An insulation-displacement connector connecting apparatus and method

Abstract: [Object] To improve a yield even for insulation-displacement joint connectors having many contacts and efficiently perform a connecting operation by insulation displacement and a cover mounting operation. [Solution] A press unit 200 is provided with a slide unit 220 for carrying a wire checking device for checking a housing of an insulation-displacement joint connector, a wire pushing device and a cover holder as connection-assisting parts. A wire checking operation, a wire pushing operation and a cover mounting operation are continuously performed by switching the slide unit 220 by means of a switching device 230 and successively driving the connection-assisting parts by means of one press 210.

Description: The present invention relates to an insulation-displacement connector connecting apparatus and method. Generally, a wiring harness is an electrical wiring system having a multitude of wires. In an assembling operation, wires are laid on a board-shaped device called an assembling board, and various electrical devices and wiring devices including insulation-displacement connectors, preferably insulation-displacement joint connectors are mounted on the assembling board. In the case of producing a particularly large wiring harness, such a method has been widely used according to which a plurality of unit wire assemblies called partially bundled circuits are produced, and then are electrically connected by an insulation-displacement joint connector in a fully bundling process (see, for example, Japanese Unexamined Utility Model Publication No. 61-117465). FIG. 1 is an exploded perspective view of an insulation-displacement joint connector to be connected by an apparatus according to the present invention. As shown in FIG. 1, an insulation-displacement joint connector 20 is provided with a cover 21 made of a resin, a housing 22, and an insulation-displacement terminal 23 made of an electrically conductive material. The cover 21 has a U-shaped lateral cross section and is integrally provided with a substantially rectangular top plate 21A, side plates 21B extending at the longer sides of the top plate 21A and end plates 21C extending at the shorter ends of the top plate 21A. A multitude of pushing pieces 21D extend downward from the inner surface of the top plate 21A for pushing unillustrated wires into an insulation-displacement terminal 23. The housing 22 is integrally provided with a main body 22A which faces the top plate 21A of the cover 21 and is substantially rectangular in plan view, and two groups of holding pieces 22B, 22C aligned in two lines along the longitudinal direction of the main body 22A. A multitude of holding pieces 22B, 22C stand in lines along the longitudinal direction, and temporarily holding portions 202 for temporarily holding branch wires to be connected with the insulation-displacement terminal 23 by insulation displacement are formed by holding spaces D1. Two groups of projections aligned in two lines are formed between and in parallel to the groups of holding pieces 22B, 22C, and the insulation-displacement terminal 23 is mounted between the two groups of projections. The insulation-displacement terminal 23 is made of an electrically conductive plate material and is designed for electrically connecting the insulation-displacement terminal 23 and the branch wires by holding cores of the branch wires while cutting insulation coatings thereof open. Various presses are used to electrically connect part of wires forming a wiring harness by the aforementioned insulation-displacement joint connector 20. For example, the applicant of the present invention has proposed a construction in which the housing 22 of the insulation-displacement joint connector 20 is positioned on a connector table standing on an assembling board for a wiring harness, an insulation-displacement press is detachably coupled with the connector table while being so suspended as to be movable upward and downward, and the cover 21 of the insulation-displacement joint connector 20 is mounted in the insulation-displacement press and pressed thereby to push the wires into the insulation-displacement terminal 23 for connection while mounting the cover 21 on the housing 22 (see Japanese Patent Publication No. 2970273). However, this construction cannot be applied to insulation-displacement joint connectors having many contacts since the connection of the wires by insulation displacement and mounting of the cover 21 on the housing 22 are performed solely by a pressing force of the insulation-displacement press. In view of the above, a construction provided with a pushing press for pushing the wires mounted in the housing 22 by an operator into the insulation-displacement terminal 23 prior to pressing by the insulation-displacement press has been proposed for insulation-displacement joint connectors having many contacts (see Japanese Unexamined Patent Publication No. 11-039967). However, it puts a large burden on the operator and causes a poor operability in the case of a large number of lots to attach and detach the press for mounting the cover after attaching and detaching the press for connecting the wires by insulation displacement in order to connect one insulation-displacement joint connector. As a further example, EP-A-0 833 417 which is considered to represent the closest prior art relates to the manufacture of a wire harness in which a plurality of electric wires for the wire harness are arranged and connected with pressure to a connector having a plurality of pressure-terminals, wherein the manufacture is conducted by an electric wire pressure-connecting machine. In view of the above problems, an object of the present invention is to provide an insulation-displacement connector connecting apparatus and method allowing to efficiently perform a connecting operation by insulation displacement and a cover mounting operation for insulation-displacement connectors preferably having many contacts. This object is solved according to the invention by an insulation-displacement connector connecting apparatus according to claim 1 and by an insulation-displacement connector connecting method according to claim 7. Preferred embodiments of the invention are subject of the dependent claims. According to the present invention, there is provided an insulation-displacement connector connecting apparatus, preferably an insulation-displacement joint connector connecting apparatus for connecting an insulation-displacement connector, preferably an insulation-displacement joint connector having an insulation-displacement terminal for connecting, preferably shorting a plurality of wires, a housing for receiving the insulation-displacement terminal and a cover to be mounted on the housing with the wires or a wiring harness on an assembling board for the wires or wiring harness, comprising: a pressure-receiving table for at least partly receiving the housing of the insulation-displacement joint connector, a press unit comprising, as connection-assisting parts, a wire pushing device for pushing the wires mounted in the housing on the pressure-receiving table into the insulation-displacement terminal mounted in the housing and a cover holder or mounter for holding or mounting the cover of the insulation-displacement connector, preferably the insulation-displacement joint connector to mount the cover on the housing after the wires are pushed thereinto, and adapted to press the respective connection-assisting parts, and a drive controlling means for controllably driving the press unit so as to press the wire pushing device and the cover holder as the connection-assisting parts in this order. The pressure-receiving table is mounted on the press unit and movably provided with respect to a casing of the press unit between a mounting position where the wires are or can be mounted and detached and a pressure-receiving position where it receives pressure from the press unit. Accordingly, since the wire pushing device and the cover holder as the connection-assisting parts are successively driven by the same press unit, a wire pushing operation and a cover mounting operation can be automatically performed. Preferably, the press unit further comprises, as a connection-assisting part, a wire checking device for checking the wires before they are pushed by the wire pushing device, and the drive controlling means comprises a discriminating portion for judging whether or not a state of the wire is satisfactory when the wire checking device of the press unit is driven, permits the press unit to drive the wire pushing device and the cover holder if the discriminating portion judges that the state of the wires is satisfactory and hinders the operation of the press unit if it judges that the state of the wires is unsatisfactory. With such a construction, the unsatisfactory state of the wires (e.g. wires crossing or being laid one over the other or misaligned with respect to each other) mounted in the housing of the insulation-displacement (joint) connector is detected by the wire checking device and, if it is discriminated by the discriminating portion, the drive controlling means for controlling the press unit hinders any further operation. Thus, an occurrence of an error can be prevented. With such an arrangement, since the pressure-receiving table and the press unit are incorporated into the common casing, there is no danger of inadvertently striking the housing of the connector against a member of the press unit when the pressure-receiving table and the press unit are positioned with respect to each other as compared to a case where the pressure-receiving table is provided on the assembling board for the wiring harness. Further, since the pressure-receiving table is movable between the mounting position and the pressure-receiving position, it can be easily done to mount the housing on the pressure-receiving table and to place the wires in the mounted housing. Further, in a specific embodiment, the press unit preferably comprises: a press for performing a pressing operation in correspondence with, preferably substantially right above the pressure-receiving table, a reciprocally movable unit adapted to carry the connection-assisting parts and reciprocally movable within a range of a specified stroke, a switching device for switchingly setting the respective connection-assisting parts at a pressing position set in the press via the reciprocally movable unit in an order of the wire pushing device and the cover holder, and a transmitting means for transmitting a driving force of the press to the connection-assisting part set at the pressing position. Such a press unit can be inexpensively constructed since a plurality of operation steps can be performed using the same press. In a further specific preferred embodiment of the invention, the reciprocally movable unit preferably comprises a shank detachably mountable on a shank holder of the press, and an elevatable block provided for each of the connection-assisting parts and individually movable towards and away from the pressure-receiving table, preferably substantially upward and downward. With such a reciprocally movable unit, it is possible to individually change settings for the elevatable blocks for each of the connection-assisting parts and to set suitable elevation conditions (or pressing conditions) for each connection-assisting part. In another preferred embodiment of the present invention, the reciprocally movable unit preferably comprises an elevatable plate adapted to integrally or unitarily carry the respective connection-assisting parts and directly driven by the press to move towards and away from the pressure-receiving table, preferably substantially upward and downward. Such a reciprocally movable unit can have a simplified construction. Further, since the respective connection-assisting parts are directly mounted on the elevatable plate, the pressing operation can be performed by a relatively small press. Most preferably, the pressure-receiving table and the press unit are positioned with respect to each other by means of at least one pin provided on one of the pressure-receiving table and the press unit and by a corresponding recess provided on the other of the pressure-receiving table and the press unit. According to the invention, there is further provided an insulation-displacement connector connecting method, in particular for use in an apparatus according to the invention or an embodiment thereof, for connecting an insulation-displacement connector, preferably an insulation-displacement joint connector, having at least one insulation-displacement terminal for connecting preferably shorting a plurality of wires, a housing for receiving the insulation-displacement terminal and a cover to be mounted on the housing with the wires on an assembling board for the wires, comprising the following steps: positioning the housing of the insulation-displacement connector on a pressure-receiving table, wherein the pressure-receiving table is mounted on the press unit and wherein the pressure-receiving table is movably provided with respect to a casing of the press unit between a mounting position where the wires can be mounted and detached and a pressure-receiving position where it receives pressure from the press unit, pressing the wires into connection with the insulation-displacement terminal by means of a wire pushing device for pushing the wires, and subsequently mounting the cover on the housing after the wires are pushed thereinto by means of a cover holder or mounter for holding or mounting the cover of the insulation-displacement connector. According to a preferred embodiment of the invention, the method further comprises the step of checking the wires before they are pushed by the wire pushing device, wherein it is judged whether or not a state of the wire is satisfactory when the wire checking device of the press unit is driven, the wire pushing device and the cover holder being driven if it is judged that the state of the wires is satisfactory whereas the wire pushing device and the cover holder being hindered from operation if it judged that the state of the wires is unsatisfactory. These and other objects, features and advantages of the present invention will become more apparent upon reading of the following detailed description of preferred embodiments and accompanying drawings. It should be understood that even though embodiments are separately described, single features thereof may be combined to additional embodiments. FIG. 1 is an exploded perspective view of an example of an insulation-displacement joint connector to be connected by a connector connecting apparatus according to the invention, FIG. 2 is a perspective view of the connector connecting apparatus according to one preferred embodiment of the invention, FIG. 3 is an exploded perspective view showing a portion of the connector connecting apparatus according to the embodiment of FIG. 2, FIG. 4 is an exploded perspective view showing a portion of a casing according to the embodiment of FIG. 2, FIG. 5 is a partly exploded perspective view of a slide unit according to the embodiment of FIG. 2, FIG. 6 is a perspective view showing a driving construction of the slide unit according to the embodiment of FIG. 2, FIGS. 7(A), 7(B) and 7(C) are schematic front views showing a relationship between the slide unit and the casing according to the embodiment of FIG. 2 during a wire checking operation, during a wire pushing operation and during a cover mounting operation, respectively, FIGS. 8(A), 8(B) and 8(C) are perspective views showing displaced states of the slide unit according to the embodiment of FIG. 2 during the wire checking operation, during the wire pushing operation and during the cover mounting operation, respectively, FIG. 9 is an enlarged perspective view showing a relationship between the slide unit and a pressure-receiving table according to the embodiment of FIG. 2, FIGS. 10(A) and 10(B) are schematic lateral sections showing a wire checking device as a connection-assisting part according to the embodiment of FIG. 2 at the time of checking a good product and at the time of a defective product, FIG. 11 is a schematic longitudinal section of the wire checking device of FIG. 10, FIG. 12 is a schematic section of a wire pushing device as the connection-assisting part according to the embodiment of FIG. 2, FIG. 13 is a schematic section of a cover holder as the connection-assisting part according to the embodiment of FIG. 2, FIG. 14 is a schematic front view of an operation box according to the embodiment of FIG. 2, FIG. 15 is a flow chart of an operation procedure according to the embodiment of FIG. 2, FIG. 16 is a perspective view showing a schematic construction of an embodiment, which is not covered by the invention, FIG. 17 is a perspective view showing a schematic construction of a press portion according to the embodiment of FIG. 16 when viewed from behind, FIG. 18 is an exploded perspective view of a pressure-receiving table according to the embodiment of FIG. 16, FIG. 19 is a simplified perspective view showing a portion of the press unit according to the embodiment of FIG. 16, FIG. 20 is an exploded perspective view showing a construction of a rotatable unit according to the embodiment of FIG. 16, FIG. 21 is a perspective view showing a press mechanism according to the embodiment of FIG. 16, FIG. 22 is a perspective view showing a phase of the rotatable or pivotable unit during a wire checking operation according to the embodiment of FIG. 16, FIG. 23 is a perspective view showing a phase of the rotatable or pivotable unit during a wire pushing operation according to the embodiment of FIG. 16, and FIG. 24 is a perspective view showing a phase of the rotatable or pivotable unit during a cover mounting operation according to the embodiment of FIG. 16. Hereinafter, preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. FIG. 2 is a perspective view of a connector connecting apparatus 100 according to one preferred embodiment of the present invention. With reference to FIG. 2, in the shown embodiment, a press unit 200 of a connector connecting apparatus 100 is suspended by a suspension means, preferably an unillustrated chain above or near a conveyance line of endlessly conveying a plurality of assembling boards 1 on which a wiring harness WH is assembled, and an insulation-displacement joint connector 20 as a preferred insulation-displacement connector(see FIG. 1) is or can be connected with part of branch wires (wires) of the wiring harness WH held by holders (so-called U-shaped jigs) 2 on the conveyed assembling board 1 by the connector connecting apparatus 100. With reference to FIGS. 2 and 3, the connector connecting apparatus 100 according to the shown embodiment is provided with the press unit 200, a pressure intensifying tank 300 for driving the press unit 200, a control box 310 and an operation box 320. As shown in FIG. 2, the press unit 200 is positioned with respect to the wiring harness WH on the assembling board 1 by a locking device 3 mounted or mountable on the assembling board 1. The locking device 3 includes a plate portion 3a secured on the assembling board 1 e.g. by screws and a pair of locking projections 3b standing at or projecting from the substantially opposite sides of the plate portion 3a and projecting at an angle different from 0° or 180°, preferably substantially vertically extending on the inclined assembling board 1. The press unit 200 can be positioned by engaging hooks 3c provided atop the locking projections 3b with rings 111 mounted on the bottom surface of a casing 110. FIG. 3 is an exploded perspective view showing a portion of the connector connecting apparatus 100 according to the embodiment of FIG. 2. The casing 110 of the press unit 200 is integrally or unitarily provided with a pair of side walls 112 whose intermediate portions are recessed in a complicated manner, a top plate 114 provided on the upper ends of the side walls 112, a shelf plate 115 arranged right below the top plate 114, a table 116 arranged right below the shelf plate 115 and mounted on the upper edges of recessed portions, and an end plate 117 arranged in a position slightly retracted from the front ends of the side walls 112. An unillustrated bottom plate is provided at the bottom of the end plate 117, and the rings 111 are mounted on this bottom plate. An unillustrated chain or suspension means is connected with the top plate 114, and the casing 110 is suspended from the ceiling by this chain. An air cylinder 210 to be described later is fixed to the shelf plate 115. A mount plate 118 is or can be fixed at the front part of the recessed portions of the side walls 112, and an LM guide 119 is fixed to the front surface of this mount plate 118 for guiding a pair of guide rails 201 fixed to a slide unit 220 of the press unit 200 to be described later by means of corresponding grooves 119a (see FIG. 3) and carrying the slide unit 220 so as to be reciprocally movable along transverse direction. A pair of left and right handle arms 120 are preferably so mounted on the substantially opposite sides of the mount plate 118 as to cantilever therefrom. Grips 121 project from the free ends of the respective handle arms 120, so that an operator can move the connector connecting apparatus 100 by holding the respective grips 121. Further, start switches SW, which are push-buttons, are provided atop the grips 121 and electrically connected with the operation box 320 to be described later. Though not specifically shown, a cover made e.g. of an acrylic resin is provided in a suitable position of the casing 110 to secure safety during the operation of the press unit 200. Coil-shaped wire catchers 122 are preferably mounted at the substantially opposite sides of the table 116, and branch wires W of the wiring harness WH can be so held as to extend substantially along the upper surface of the table 116 by the wire catchers 122. A pressure-receiving table 140 for receiving a housing 22 of the insulation-displacement joint connector 20 (see FIG. 1) is mounted on the table 116 via a slide guide 141. FIG. 4 is an exploded perspective view showing a portion of the casing 110 according to the embodiment of FIG. 2. As shown in FIG. 4, a groove 116a extending in forward and backward or longitudinal directions of the slide guide 141 is preferably formed substantially in the middle of the table 116, and a pair of guiding pieces 142 are secured at the opposite sides of the groove 116a by screws, thereby constructing the slide guide 141 as a whole. On the other hand, the pressure-receiving table 140 includes a base 140a, a pair of ribs 140b formed on the upper surface of the base 140a, and a connector accommodating portion 140c defined between the ribs 140b. The housing 22 of the insulation-displacement joint connector 20 can be positioned and held in the connector accommodating portion 140c. A rib 140d corresponding to the groove 116a of the slide guide 141 is formed on the lower surface of the base 140a, and the pressure-receiving table 140 can be so guided as to be displaceable as a whole only in forward and backward directions by fitting the rib 140d into the groove 116a. Though not shown, a bottomed oblong hole is formed in the bottom surface of the rib 140d, and a stroke of the pressure-receiving table 140 in forward and backward or longitudinal directions can be restricted by a screw 116b standing in a specified position of the groove 116a. Thus, the pressure-receiving table 140 is movable between a mounting position where it projects forward from the slide guide 141 and a pressure-receiving position where it is located within or shifted along the slide guide 141. During a connecting operation by insulation displacement described later, the pressure-receiving table 140 is displaced to the mounting position to mount or detach the branch wires W (see FIG. 2) on the assembling board 1 into or from the housing 22 of the insulation-displacement joint connector 20 accommodated in the connector accommodating portion 140c, and is displaced to the pressure-receiving position to enable a series of operations to be described later. Further, thought not specifically shown, the table 116 is provided with a detection means realized by a limit switch or the like. Thus, unless the pressure-receiving table 140 is located at its proper pressure-receiving position, the press unit 200 cannot be actuated even if the start switch SW is operated. The screw 116b is located before the end plate 117 of the casing 110 so that a projecting amount can be adjusted below the table 116. Accordingly, the pressure-receiving table 140 can be detached from the table 116 during maintenance. In the shown embodiment, a grip 140e projects from the front end surface of the pressure-receiving table 140 to facilitate the insertion and withdrawal of the pressure-receiving table 140 as described above. Next, with reference to FIG. 3, the press unit 200 includes the air cylinder 210, the slide unit 220 transversely displaceable by the LM guide 119 of the casing 110, a switching cylinder 230 for reciprocally moving the slide unit 220 in transverse direction with respect to the positioned branch wires W. In the shown embodiment, the air cylinder 210 is a preferred embodiment of a press machine, and is so constructed as to move a rod 211 (see FIG. 7) thereof upward and downward. A flange 212 as a shank holder is fixed to the rod 211 as shown in FIG. 7. A pressing position where the rod 211 is moved upward and lowered or moved toward and away from the pressure receiving table 140 by the air cylinder 210 is set right above the pressure-receiving table 140. FIG. 5 is a partly exploded perspective view showing the slide unit 220 according to the embodiment of FIG. 2; FIG. 6 is a perspective view showing a driving construction of the slide unit 220 according to the embodiment of FIG. 2; FIGS. 7(A), 7(B) and 7(C) are schematic front views showing a relationship between the slide unit 220 and the casing 110 during a wire checking operation, during a wire pushing operation and during a cover mounting operation, respectively; FIGS. 8(A), 8(B) and 8(C) are perspective views showing displaced states of the slide unit 220 during the wire checking operation, during the wire pushing operation and during the cover mounting operation, respectively; and FIG. 9 is an enlarged perspective view showing a relationship between the slide unit 220 and the pressure-receiving table 140. With reference to FIGS. 5 to 9, the slide unit 220 according to the shown embodiment is provided with a slide block 221 in the form of a substantially rectangular parallelepiped elongated in transverse direction, and three elevatable blocks (222, 223, 224 for checking wires, for pressing the wires and for mounting a cover) substantially continuous with the slide block 221 right therebelow. The slide block 221 preferably is a hollow metallic member, and is provided on its rear surface with the pair of guide rails 201 to be guided by the grooves 119a (see FIG. 3) of the LM guide 119. The respective elevatable blocks 222 to 224 are preferably hollow blocks substantially in the form of a rectangular parallelepiped, and are relatively and individually movable upward and downward with respect to the slide block 221 with shanks 225 fixed to the upper surfaces thereof pierced through the slide block 221 to project upward. Turn-stop pins 226 (only one is shown by hidden line in FIG. 6) project at four corners of the upper surface of each of the elevatable blocks 222 to 224, and the respective elevatable blocks 222 to 224 are so coupled to the slide block 221 as to be relatively displaceable only along extension or vertical direction by the turn-stop pins 226. The shank 225 of each elevatable block 222 to 224 is provided with a C- or channel-shaped coupling member 227, which includes a bottom plate 227a, end plates 227b opposed to each other at the front and rear ends of the bottom plate 227, and upper edge portions 227c horizontally extending from the upper ends of the end plates 227b while being opposed to each other in forward and backward directions. The coupling member 227 is coupled to the flange 212 forming the shank holder by the lower surfaces of the upper edge portions 227c with the rod 211 (see FIG. 7) of the air cylinder 210 inserted through a slit between the upper edge portions 227c. As shown in FIGS. 7(A) to 7(C), a pair of carrying stays 115a extend downward from the shelf plate 115 of the casing 110 at the opposite sides of the air cylinder 210. The stays 115a carry holding plates 115 corresponding to the configuration of the coupling members 227. By holding the coupling members 227 not coupled with the flange 212 of the air cylinder 210 by the holding plates 115b as shown in FIGS. 7(A) to 7(B), all the shanks 225 (accordingly also the corresponding elevatable blocks) not coupled to the air cylinder 210 are prevented from descending. As shown in FIG. 5, the end plates 222a to 224a are detachably mounted by screws so that the inside of the respective elevatable blocks 222 to 224 can be exposed. Connection-assisting parts used to connect the insulation-displacement joint connector 20 (see FIG. 3) are or can be mounted on the respective elevatable blocks 222 to 224 (specifically, a wire checking device 250 shown in FIGS. 10 and 11 in the elevatable block 222, a wire pushing device 260 shown in FIG. 12 in the elevatable block 223 and a cover holder 270 shown in FIG. 13 in the elevatable block 224). As shown in FIG. 6, 8 and 9, gauge dogs 228 are secured to the rear surfaces of the respective elevatable blocks 222 to 224, so that the stroke of the air cylinder 210 can be controlled after a switch 229a of a lower-limit gauge or sensor 229 mounted at the rear side of the table 116 of the casing 110 is pushed down to a specified position. Further, stopper pins 143 stand on the respective ribs 140b of the pressure-receiving table 140. By receiving the descending elevatable block 222 to 224 by the stopper pins 143, the connection-assisting part (or a cover 21) in the elevatable block 222 to 224 is pressed against the housing 22 of the insulation-displacement joint connector 20 at a uniform pressure. A positioning pin 144 having a smaller diameter than the stopper pins 143 preferably substantially concentrically projects from at least one stopper pin 143, and a positioning hole 144a corresponding to the positioning pin 144 is formed in the bottom surface of each elevatable block 222 to 224, so that the housing 22 of the insulation-displacement joint connector 20 held on the pressure-receiving table 140 and the connection-assisting parts mounted on the respective elevatable blocks 222 to 224 can be precisely positioned with respect to each other. Since the positioning pin 144 projects from the pressure-receiving table 140 in the shown embodiment, the wires are prevented from getting jammed when the pressure-receiving table 140 and the elevatable block 222 to 224 are positioned, taking advantage of the projective shape of the positioning pin 144. Next, with reference to FIG. 6, the switching cylinder 230 is provided as a mechanism for sliding the respective elevatable blocks 222 to 224 by driving the slide unit 220 in transverse direction with respect to the pressure receiving table 140 or in longitudinal direction with respect to the branch wires W in the shown example. The switching cylinder 230 includes a main body 231 installed at a rear part of the casing 110, a pivotal arm 232 mounted below the main body 231, and a cam roller 233 mounted on the upper or lateral surface of the free end of the pivotal arm 232. Inside the main body 231 are provided a pinion gear 234 concentrically arranged with a center of rotation of the pivotal arm 232 and integral or unitary to the pivotal arm 232, a pair of rack gears 235, 236 symmetrically arranged at the opposite sides of the pinion gear 234, and air nozzles 237, 238 which are so mounted at one shorter end of the main body 231 as to correspond to the respective rack gears 235, 236. The pinion gear 234 is rotated or pivoted by selectively driving one rack gear 235 (236) by either one of the air nozzles 237 (238), thereby causing the pivotal arm 232 coupled with the pinion gear 234 to pivot to the right or left. On the other hand, a forked link 221 a to be coupled with the cam roller 233 of the pivotal arm 232 is secured to the slide block 221 of the slide unit 220. The slide unit 220 is transversely displaced upon being subjected to a force of the pivotal arm 232 transmitted from the link 221 via the cam roller 233, with the result that any one of the elevatable blocks 222 to 224 can be coupled with the air cylinder 210 (see FIG. 7) as shown in FIGS. 7(A) to 7(C) and FIGS. 8(A) to 8(C) by adequately displacing or shifting or sliding the slide unit 220. Here, right and left limits of the pivoting movement of the pivotal arm 232 can be defined by the stoppers 239, 240 provided at the other shorter end of the main body 231, and the pivotal arm 232 is stopped at a middle position of its pivotal range by projecting a rod 242a of an air cylinder 242 (see FIGS. 3 and 6) provided at a side of the switching cylinder 230 at a specified timing to precisely couple the shank 225 of the elevatable block 223 corresponding to the wire pushing device 260 with the air cylinder 210. Next, the connection-assisting parts mounted on the respective elevatable blocks 222 to 224 are described in detail. FIGS. 10(A) and 10(B) are schematic lateral sections showing the wire checking device as the connection-assisting part according to the embodiment of FIG. 2 at the time of checking a good product and at the time of a defective product, and FIG. 11 is a schematic longitudinal section of the wire checking device of FIG. 10. With reference to FIGS. 10 and 11, the elevatable block 222 for checking the wires which is provided at one end of the slide block 221 is provided with the wire checking device 250 as the connection-assisting part. The wire checking device 250 includes a plurality of wire sensors 251 provided in correspondence with the contacts of the insulation-displacement joint connector 20 to be connected, and a block 252 carrying the wire sensors 251. By securing the block 252 to a bottom portion 222b of the elevatable block 222 by screws 253, the presence of the branch wires W mounted in the housing 22 can be checked preferably in a non-contact manner. As shown in FIG. 11, an elevatable plate 254 is provided below the block 252 and is movably supported upward and downward by a pair of front and rear rods 255. Sleeves 256 having a larger diameter than the rods 255 are fitted atop the respective rods 255, which are fixed to the bottom of the elevatable block 222 via the sleeves 256. A coil spring 257 is provided between the bottom surface of each sleeve 256 and the elevatable plate 254 to constantly bias the elevatable plate 254 downward or toward and away from the pressure receiving table 140. The elevatable plate 254 pushes the branch wires W (see FIG. 10) mounted in the housing 22 (see FIG. 1) during the descent of the elevatable block 222, thereby straightening the branch wires to prevent a failure connection by insulation displacement. Further, at least one opening 254a for exposing the respective wire sensors 251 to the wires is formed in the middle of the elevatable plate 254. On the other hand, if the branch wires W cross or laid one over the other, they cannot be dealt with only by being pushed by the elevatable plate 254. Thus, the coil springs 257 are set not to be compressed to prevent the elevatable plate 254 from being lowered any further in the case that a reaction force subjected to the elevatable plate 254 during the wire pushing operation is larger than a predetermined value. As shown in FIGS. 10(A) and 10(B), a projection 254b for detecting inclination project at an intermediate position of the elevatable plate 254 with respect to its longitudinal direction and a failure detecting sensor 258 for detecting a failed arrangement of the wires by the inclination of the projection 254b is fixed to the bottom portion 222b. Thus, if the branch wires W mounted in the housing 22 of the insulation-displacement joint connector 20 should cross or be laid one over the other or misaligned with respect to each other, the elevatable plate 254 cannot be lowered to a proper height as shown in FIG. 10(B). Such a failed wire arrangement is detected by detecting a gap G between the proper height and an actual height of the elevatable plate 254, preferably of its projection 254b. FIG. 12 is a schematic section of the wire pressing device 260 as the connection-assisting part according to the embodiment of FIG. 2. With reference to FIG. 12, the wire pushing device 260 is a die including a block member 261 to be mounted in a recess 223c formed in the lower surface of a bottom portion 223b of the elevatable block 223 used to push the wires, and pushing projections 262 projecting from the bottom surface of the block member 261. The number of the pushing projections 262 corresponds to that of the contacts of the insulation displacement joint connector 20 to be connected so as to push the individual branch wires W at once and connect them with the insulation-displacement terminal 23 (see FIG. 1) mounted in the housing 22 by insulation displacement. FIG. 13 is a schematic section of the cover holder 270 as the connection-assisting part according to the embodiment of FIG. 2. As shown in FIG. 13, the cover holder 270 includes a main body 271 secured by screws 242 to a bottom portion 224b of the elevatable block 224 for mounting the cover, and an accommodating recess 272 formed in the bottom surface of the main body 271. The accommodating recess 272 is formed such that the cover 21 of the insulation-displacement joint connector 20 can be at least partly accommodated therein only when being properly positioned. This is designed to prevent the operator from erroneously mounting the cover 21. In the shown example, a sensor 224c is mounted in the bottom portion 224b of the elevatable block 224 for detecting the presence or absence of the cover 21. With reference to FIG. 2, the air cylinder 210 and the switching cylinder 230 are constructed to operate upon receiving pressurized air from the pressure intensifying tank 300. The air supply from the pressure intensifying tank 300 is controlled by the control box 310 constructing a drive controlling means, and the control box 310 is controlled by operating the operation box 320 likewise constructing the drive controlling means. FIG. 14 is a schematic front view of the operation box according to the embodiment of FIG. 2. With reference to FIG. 14, a mode changeover switch 321, a home-position return switch 322, a step-operation switch 323, a reset switch 324, a facility working display lamp 325, a confirmation lamp 326, an emergency-stop switch 327, a buzzer 328 as a notifying device, a message number display 329, a wire number input switch 330 and a lower limit display unit 331 are provided on a front panel 320 of the operation box 320. The mode changeover switch 321 is adapted to switch the operation control of the press unit 200 to an automatic operation (so-called automatic mode) and a condition setting operation (so-called condition setting mode) for confirming whether or not a facility will properly operate. The home-position return switch 322 is adapted to return the respective elements to their home positions upon power application to the apparatus or upon restarting the press unit 200 after an emergency stop. The step operation switch 323 is adapted to perform one operation step every time the start switch SW (see FIGS. 2 and 3) is pressed in the case that the automatic mode is selected by the changeover switch 321. The reset switch 324 is adapted to perform an abnormality processing by canceling a controlled state upon an occurrence of an abnormality. The facility working display lamp 325 is one example of the display means for displaying that the facility is working. The confirmation lamp 326 is turned on to notify an operator of an abnormality when an abnormality occurs or the cover is not mounted. The emergency-stop switch 327 is adapted to forcibly stop the operation of the press unit 200 upon an occurrence of an emergent abnormality. The buzzer 328 operates as a notification means upon an occurrence of an abnormality or upon completion of the operation to notify the operator of it. The message number display 329 is formed of a liquid crystal display and is adapted to preferably numerically display an error code upon an occurrence of an abnormality, product numbers in the automatic mode, and the number of wires in the condition-setting mode. Additionally or alternatively, comprehensive error messages may be displayed. The wire number input switch 330 is adapted to input the number of the wires in the condition-setting mode. The lower limit display unit 331 is a digital unit provided with a liquid crystal display 331a and an unillustrated operation button. When the operation button is operated, the lower limit positions of the elevatable blocks 222 to 224 when the wire pressing/cover mounting operation is to be performed are displayed and tolerances are or can be inputted. The operation of the press unit 200 can be controlled as described next by suitably operating the respective switches 321, 322, 323, 324, 327 and 330. The operation box 320 is also electrically connected with the start switches SW and the sensors provided in the respective elements of the press unit 200. Further, a bar code reader 350 is connected with the operation box 320 in order to respond to a plurality of product numbers. The connecting operation is or can be controlled based on the product number read by the bar code reader 350. FIG. 15 is a flow chart of an operation procedure according to the embodiment of FIG. 2. With reference to FIG. 15, initialization is performed in Step S1 in the aforementioned embodiment. Specifically, the mode is set, the lower limit positions are set, conditions are set for each product number, and the product number is specified by reading it preferably by means of the bar code reader 350. In this setting operation, the slide unit 220 is so initialized by the switching cylinder 230 that the elevatable block 222 for checking the wires is coupled to the air cylinder 210 as shown in FIG. 7(A) and 8(A). With reference to FIG. 2, upon starting the operation, the operator connects the casing 110 with the conveyed assembling board 1 by engaging the rings 111 of the casing 110 with the locking device 3 of the assembling board 1 while holding the grips 121 provided on the handle arms 120 of the casing 110. In this way, the pressure-receiving table 140 provided in the casing 110 is positioned with respect to a portion of the insulation-displacement joint connector 20 to be connected. Next, the operator draws the pressure-receiving table 140 held in the casing 110 from the pressure-receiving position to the mounting position, mounts the housing 22 of the insulation-displacement joint connector 20 to mount the branch wires W of the wiring harness WH in the housing 22, and returns to the pressure-receiving table 140 to the pressure-receiving position (see FIG. 9). The operator also mounts the cover 21 in the cover holder 270 (see FIG. 13) mounted on the elevatable block 224 for mounting the cover 21. The connecting apparatus 100 waits on standby until the cover 21 is mounted (Step S2) after the initialization (Step S1). Unless the cover 21 is detected, a cover-unmounted state is indicated by means of the confirmation lamp 326 or the like (Step S3) and the connecting apparatus 100 is set not to operate even if the start switch SW is operated. This can prevent the operator from carelessly forgetting to mount the cover 21. Next, when the start switch SW is operated with the cover 21 mounted, the checking operation is first performed (Steps S4, S5). In this checking operation, the air cylinder 210 lowers the rod 211 to relatively lower the elevatable block 222 via the shank 225. This causes the positioning projection 144 to fit into the positioning hole 114a of the elevatable block 222 as shown in FIG. 9, thereby positioning the wire checking device 250 which is the connection-assisting part of the elevatable block 222 and the housing 22 on the pressure-receiving table 140. Subsequently, the gauge dog 228 is lowered until it pushes the switch 229a of the lower limit gauge 229. As a result, the elevatable block 222 stops while the lower surface of the bottom portion 222b is held in contact with the respective stopper pins 143, thereby pressing the wire checking device 250 against the housing 22 preferably at a specified (predetermined or predeterminable) substantially uniform pressure. With reference to FIG. 10(A), the elevatable plate 254 presses the wires in a proper position by a biasing force of the coil springs 257 as shown if the branch wires W are properly mounted in the housing 22 or located only slightly above their properly mounted positions. As a result, the error detecting sensor 258 detecting the orientation of the elevatable plate 254 by the projection 254 judges that the wires W are properly laid (step S6). Since the presence of the branch wires W is simultaneously detected by the wire sensor 251, even if mounting of the branch wires W should be forgotten, it can be detected. On the other hand, if the elevatable plate 254 cannot be lowered to its proper height due to a failed arrangement of the wires as shown in FIG. 10(B), the gap G is detected by the error detecting sensor 258. Thus, the wire checking device 250 judges a failed wire arrangement (NO in step S6). Alternatively or additionally, an error is also judged if the wire sensor 251 cannot detect the branch wires W as specified. Upon judging an error, a control system (microprocessor and the like) in the control box 310 stops the operation (see Step S7) preferably after performing an error processing such as an error display. This prevents the insulation-displacement joint connector 20 experiencing a failed wire arrangement or the like from being connected with the wire harness WH, thereby improving a yield. When the arranged state of the branch wires W is judged to be proper by the wire checking device 250 and the elevatable block 222 is raised to its initial position, the control enters the wire pressing operation (see Step S8). In this operation, the switching cylinder 230 first causes the slide unit 220 to move forward by one position to couple the shank 225 of the elevatable block 223 for pushing the wires to the flange (shank holder) 212 provided on the rod 211 of the air cylinder 210, thereby movably coupling the elevatable block 223 upward and downward or toward and away from the pressure receiving table 140 (see FIG. 7(B)). As described above, this positioning is or can be preferably precisely performed by causing the rod 242a of the air cylinder 242 to project. Then, the elevatable block 223 for pressing the wires is lowered by the air cylinder 210 in the same manner as described above, and is positioned as in the case of the elevatable block 222 as described with reference to FIG. 9. The pushing projections 262 of the wire pushing device 260 mounted on the elevatable block 223 pushes the corresponding branch wires W in the housing 22 to press them into the insulation-displacement terminal 23 mounted in the housing 22. As a result, the cores of the respective branch wires W are electrically connected with the insulation-displacement terminal 23 after the coatings thereof are torn or cut (i.e. connected by insulation displacement). When the elevatable block 223 is returned to its original position again upon completion of the wire pushing operation, the control enters the cover mounting operation (Step S9). In the cover mounting operation, after the air cylinder 242 (see FIGS. 3 and 6) causes the rod 242a to contract to release the pivotal arm 232 of the switching cylinder 230, the pivotal arm 232 is rotated or pivoted in forward direction to move the slide unit 220 forward and movably couple the elevatable block 224 for mounting the cover with the air cylinder 210 upward and downward (see FIG. 7(C)). Subsequently, the elevatable block 224 is lowered by the air cylinder 210 in the same manner as above to position the cover 21 and the housing 22 as in the cases of the elevatable blocks 222 and 223, thereby connecting them with each other. Upon completion of the cover mounting operation, the respective elements are preferably returned substantially to their home positions (Step S10), thereby completing the connector connecting operation. A more specific example of use may be such that the home-position return switch 322 is operated only once when the power switch is turned on (initialization in Step S1) and the state of the apparatus is returned to the cover mounting standby state (Step S2) from the return to the home positions (Step S10). As described above, in the aforementioned embodiment, operation steps from the wire checking operation to the cover mounting operation can be automatically performed, and a yield can be improved since an occurrence of an error can be prevented by the wire checking device and the like. Particularly, since the pressure-receiving table 140 is insertably and with-drawably provided between the mounting position where the branch wires W are mounted on and detached from the casing 110 carrying the press unit 200 and the pressure-receiving position with respect to the press unit 200, the pressure-receiving table 140 and the press unit 200 are incorporated into the common casing 110. Thus, as compared to a case where the pressure-receiving table 140 is provided on the assembling board 1 for the wiring harness WH, there is no danger of striking the housing 22 of the insulation-displacement joint connector 20 against a member (e.g. casing 110) of the press unit 200 when the pressure-receiving table 140 and the press unit 200 are positioned with respect to each other. Further, the pressure-receiving table 140 is so constructed as to be insertable and withdrawable between the mounting position and the pressure-receiving position, it can be easily done to mount the housing 22 on the pressure-receiving table 140 and to place the branch wires W in the mounted housing 22. Further, this embodiment includes the press (air cylinder 210 in the shown example) for moving the shanks 225 provided in the elevatable blocks 222 to 224 upward and downward or toward and away from the pressure receiving table 140, preferably right above the pressure-receiving table 140, the connecting units (elevatable blocks 222 to 224 in the shown example) for connecting the connection-assisting parts (wire checking device 250, wire pushing device 260 and cover holder 270) with the flange 212 (shank holder) of the air cylinder 210, and the switching device (switching cylinder 230, etc.) for switching an elevating order of the respective connected connection-assisting parts 250, 260, 270. Thus, a plurality of operation processes can be performed commonly using the same air cylinder 210 as a press, which contributes to a reduction of the production cost of the press unit 200. The press unit 200 of this embodiment is provided with the air cylinder 210 for moving the flange 212 as a shank holder upward and downward right above the pressure-receiving table 140, the shank 225 detachably attachable to the flange 212 of the air cylinder 210, the elevatable clocks 222 to 224 each provided for the corresponding connection-assisting part 250, 260, 270 and individually movable upward and downward, the slide unit 220 for carrying the respective connection-assisting parts 250, 260, 270 via the corresponding elevatable blocks 222 to 224 in the aforementioned order, and the switching cylinder 230 for selectively coupling the shank 225 of the elevatable block 222 to 224 with the flange 212 of the air cylinder 210 by reciprocally moving the respective connection-assisting parts 250, 260, 270 via the slide unit 220. Thus, it is possible to individually change settings for the elevatable blocks 222 to 224 for each of the wire checking device 250, the wire pushing device 260 and the cover holder 270 as connection-assisting parts and to set suitable elevation conditions (or pressing conditions) for each connection-assisting part. Next, a further embodiment, which is not covered by the invention shown in FIGS. 16 to 24 is described. FIG. 16 is a perspective view showing a schematic construction of an embodiment, which is not covered by the present invention, and FIG. 17 is a perspective view showing a schematic construction of a press unit 500 of the embodiment shown in FIG. 16 when viewed from behind. With reference to FIGS. 16 and 17, a pressure-receiving table 400 is separated from the press unit 500 and is to be fixed to each assembling board in the shown embodiment. This embodiment is particularly preferable in the case that assembling boards 1 are not of movable type, but of fixed type. FIG. 18 is an exploded perspective view of the pressure-receiving table 400 according to the embodiment of FIG. 16. With reference to FIGS. 16 and 18, the pressure-receiving table 400 is provided with a mounting block 401 secured or securable to the assembling board 1, a table member 403 to be secured to the mounting block 401 by screws 402, and a pressure-receiving plate 404 integrally or unitarily formed atop the table member 403. The housing 22 can be detachably held in an accommodating recess 404a formed in the upper surface of the pressure-receiving plate 404. In the shown example, the pressure-receiving plate 404 is formed with positioning holes 404c. Further, L-shaped wire catchers 404b are provided at the opposite sides of the pressure-receiving plate 404. With reference to FIGS. 16 and 17, the press unit 500 is provided with a casing 510, a coupling arm 520 for coupling the casing 510 with the pressure-receiving table 400, an arm driving cylinder 530 for driving the coupling arm 520 and an air cylinder 540 as a press corresponding to the air cylinder 210 of the embodiment of FIG. 2. With reference to FIG. 17, the casing 510 is integrally or unitarily formed with a vertically extending back plate 511, a shelf plate 512 which is mounted to cantilever from the top of the back plate 511 and extend forward, and a suspended plate 514 secured to the rear part of the shelf plate 512 and bent substantially in L-shape. Chains 516 are coupled with mount fittings 515 provided at the top of the suspended plate 514 as suspension means to movably suspend the entire press unit 500 upward and downward e.g. from the ceiling. With reference to FIGS. 16 and 17, the coupling arm 520 is rotatably or pivotably supported on the front side of the shelf plate 512 of the casing 510 in its intermediate position by means of a shaft 520a, and has its base end portion pivotally coupled to the casing 510 via a link 521 bent or articulated in one position. By being coupled to the arm driving cylinder 530 via a coupling portion 523 coupled with a joint 522 of the link 521, the coupling arm 520 pivots about a transversely extending axis to move its free end forward and backward, thereby being engaged or engageable with the rear surface of the pressure-receiving plate 404 of the pressure-receiving table 400 with the block member 518 seated on the mounting block 401. As a result, the entire press unit 500 can be lockingly engaged with the pressure-receiving table 400 thereby being removably mountable thereon. In the shown embodiment as well, handles 517 project from the opposite sides of the casing 510. Arm switches SW1 for actuating the arm driving cylinder 530 and press switches SW2 for actuating the air cylinder 540 are provided in vicinity of the both handles 517 (only one side is shown in FIG. 16). The block member 518 is provided at the bottom end of the front surface of the back plate 511. FIG. 19 is a perspective view showing a simplified portion of the press unit 500 according to the embodiment of FIG. 16. As shown in FIG. 19, a pair of positioning projections 519 are provided on the bottom surface of the block member 518, whereas the mounting block 401 of the pressure-receiving table 400 is formed with insertion or fitting holes 401a corresponding to the respective positioning projections 519. Connection-assisting parts 450, 460, 470 (FIGS. 20-22) similar to the wire checking device 250, the wire pushing device 260 and the cover holder 270 in the embodiment of FIG. 2 can be precisely positioned with respect to the housing 22 mounted on the pressure-receiving table 400 by placing the block member 518 on the upper surface of the mounting block 401 while inserting the positioning projections 519 into the fitting holes 401a (see FIG. 17). At one side of the block member 518 is provided a sensor 520' for detecting that the block member 518 is correctly seated on or positioned with respect to the mounting block 401. This sensor 520' serves as a safety switch for the arm switches SW1. If the sensor 520' is not detecting a seated state of the block member 518, the arm driving cylinder 530 is not or cannot be actuated, thus the coupling arm 520 is not actuated even if an operator operates the arm switches SW1. Although not specifically shown, the arm switches SW1 are formed of, e.g. self-hold circuits such that the coupling arm 520 is locked in its coupled state even if the operator operates the arm switches SW1 until a specified operation completed state is detected after the coupling arm 520 is coupled. A substantially rod- or spline-shaped support shaft 525 rotatably or pivotably stands on the block member 518 via an unillustrated bearing, and a pivotable or rotatable unit 600 is provided on this support shaft 525. FIG. 20 is an exploded perspective view showing the construction of the rotatable unit 600 according to the embodiment of FIG. 16, FIG. 21 is a perspective view showing a press mechanism according to the embodiment of FIG. 16, FIG. 22 is a perspective view showing a phase of the rotatable unit 600 during a wire checking operation according to the embodiment of FIG. 16, FIG. 23 is a perspective view showing a phase of the rotatable unit 600 during a wire pushing operation according to the embodiment of FIG. 16, and FIG. 24 is a perspective view showing a phase of the rotatable unit 600 during a cover mounting operation according to the embodiment of FIG. 16. With reference to FIGS. 19 and 20, the rotatable unit 600 (reciprocally movable unit in this embodiment) includes a sleeve 601 slidably fittable to the support shaft 525 only in axial direction, and a substantially fan-shaped rotatable plate 602 (elevatable plate in this embodiment) provided below the sleeve 601. The connection-assisting parts 450, 460 and 470 similar to the aforementioned connection-assisting parts 250, 260 and 270 of the embodiment shown in FIG. 2 are mounted or mountable on the lower surface of the rotatable plate 602 or on the surface thereof facing the pressure receiving table 400. In the shown example, positioning projections 602a project down from the lower surface of the rotatable plate 602. The housing 22 on the pressure-receiving plate 404 is selectively positioned with respect to the connection-assisting part 450, 460 or 470 mounted on the rotatable plate 602 by fitting or inserting the corresponding positioning projections 602a into the positioning holes 404c of the pressure-receiving plate 404 in each of the respective positions to be described later. A coil spring 603 to be mounted on the support shaft 525 during assembling is provided between the rotatable unit 600 and the block member 518, so that the rotatable unit 600 is so coupled to the support shaft 525 as to be elastically or resiliently movable upward and downward or along the longitudinal direction of the support shaft 525. Since the support shaft 525 is rotatably supported on the block member 518, the rotatable unit 600 can be rotated or pivoted in both directions about the longitudinal axis of the support shaft 525. A rotary actuator 620 is mounted on the casing 510 to rotate the rotatable unit 600, and the support shaft 525 is coupled thereto via a coupling 621. The rotary actuator 620 is adapted to reciprocally move the rotatable unit 600 along circumferential direction and so constructed as to intermittently rotate it about the support shaft 525 at an interval of, e.g. 60°. The connection-assisting parts 450, 460 and 470 preferably are substantially equally arranged so as to conform to this rotation interval, so that they can stop at a pressing position determined or determinable in advance. As shown in FIG. 21, the pressing position is set such that, when the block member 518 is positioned with respect to the mounting block 401 of the pressure-receiving table 400, the air cylinder 540 carried on the casing 510 is located substantially right above or corresponding to the pressure-receiving plate 404. By moving a rod 541 of the air cylinder 540 upward and downward at this pressing position, the rotatable plate 602 of the rotatable unit 600 can be pressed from above by a substantially arch-shaped pressing element 542 fixed to the bottom end of the rod 541, and the connection-assisting part 450 (460, 470) mounted on the lower surface of the rotatable plate 602 can be pressed against the housing 22 on the pressure-receiving table 404. In the shown example, the rotatable plate 602 is positioned during its ascent and descent (or extension and contraction or forward and backward movements) by the positioning hole 404c formed in the upper surface of the pressure-receiving table 404 and the positioning projections 602a extending down from the lower surface of the rotatable plate 602. The press unit 500 is also provided with the driving device (pressure intensifying tank 300) and the drive controlling means (control box 310 and operation box 320) described with respect to FIG. 2, which can cause the press unit 500 to operate as follows. With reference to FIG. 16, in the above construction, the operator first places or positions the housing 22 on the pressure-receiving plate 404 of the pressure-receiving table 400 and mounts the cover 21 into the cover holder 470 as one of the connection-assisting parts of the press unit 500. Subsequently, the operator moves the suspended casing 510 while gripping the handles 517 preferably by both hands, and causes the block member 518 to be seated on the mounting block 401 while fitting the positioning projections 519 of the block member 518 into the fitting holes 401a of the mounting block 401 provided on the pressure-receiving table 400 of the assembling board 1. This causes the sensor 520 to detect the correct or seated state of the block member 518, making the arm switches SW1 operable. Subsequently, when the operator operates the arm switch SW1, the arm driving cylinder 530 lowers the coupling portion 523 to engage the free end of the coupling arm 520 with the rear surface of the pressure-receiving plate 404 of the pressure-receiving table 400, thereby lockingly engaging the press unit 500 with the pressure-receiving table 400. In the shown embodiment, an unillustrated control system is so programmed as to confirm whether or not the cover 21 is mounted as the coupling arm 520 is coupled. If mounting of the cover 21 is detected to have forgotten at this point of time, the cover-unmounted state display is made as in the case described with reference to the flow chart for the embodiment shown in FIG. 2 and a next operation step does not follow until mounting of the cover 21 is detected (see Steps S2, S3 of FIG. 15). Subsequently, when the operator operates the press switch SW2, operations of Steps S5 to S10 of FIG. 15 are basically carried out to automatically perform the wire checking operation, the wire pushing operation and the cover mounting operation. With reference to FIG. 22, the phase of the rotatable plate 602 of the rotatable unit 600 is set such that the wire checking device 450 is located at the pressing position (see FIG. 21) during the wire checking operation. In this state, the air cylinder 540 shown in FIG. 21 causes the rod 541 to extend to lower the pressing element 542, thereby pushing the rotatable plate 602 down (hereinafter, "pressing operation"). In this way, the wire checking operation similar to the one described with reference to Steps S5 to S7 of FIG. 15 can be performed. Next, with reference to FIGS. 22 and 23, when the air cylinder 540 causes the rod 541 to contract upon completion of the wire checking operation, the rotatable unit 600 (accordingly the rotatable plate 602) is moved up by the biasing force of the coil spring 603 (see FIG. 20) supporting the rotatable unit 600. Then, the rotary actuator 620 moves the rotatable unit 600 forward by one position to bring the wire pushing device 460 to the pressing position. Thereafter, the wire pushing operation can be performed by repeating the pressing operation. Further, with reference to FIGS. 22 and 24, when the rotatable unit 600 is moved up as above after completion of the wire pushing operation, the rotary actuator 620 moves the rotatable unit 600 forward by one position to bring the cover holder 470 to the pressing position. Thereafter, the cover mounting operation can be performed by repeating the pressing operation. When the rotatable unit 600 is moved up or away from the pressure receiving table 400 after completion of the cover mounting operation, the rotary actuator 620 rotates the ratable unit 600 backward until the wire checking device 450 is returned to the pressing position. The locked state of the arm switches SW1 is canceled upon completion of the returning movement of the rotatable unit 600, and the operator operates the arm switch SW1 again to disengage the coupling arm 520 from the pressure-receiving plate 404 of the pressure-receiving table 400. Thereafter, the operator detaches the press unit 500 from the pressure-receiving table 400 by gripping the handles 517, thereby completing the whole operation. In the aforementioned embodiment as well, the operation steps from the wire checking operation to the cover mounting operation can be automatically performed and an occurrence of an error can be prevented by the wire checking device and the like. Therefore, a yield can be improved. Further, in this embodiment as well, a plurality of connection-assisting parts (wire checking device, wire pushing device 460 and cover holder 470) are provided on the rotatable unit 600 right above the pressure-receiving table 400, and the same air cylinder 540 is commonly used as the press. Therefore, the press unit can be more inexpensively constructed. The aforementioned embodiments are merely preferable specific examples of the present invention, and the present invention is not limited thereto. For example, a positioning pin may stand on the pressure-receiving table 404, and a corresponding positioning hole may be formed in the lower surface of the rotatable plate 602 in the embodiment shown in FIGS. 16 to 24. It should be appreciated that various other design changes can be made without departing the scope of the present invention as claimed. As described above, the operation steps from the wire checking operation to the cover mounting operation can be automatically performed and a yield can be improved since an occurrence of an error can be prevented by the wire checking device and the like. Thus, the present invention can provide remarkable effects of a higher yield even for insulation-displacement joint connectors having many contacts and an efficient performance of the connecting operation by insulation displacement and the cover mounting operation. LIST OF REFERENCE NUMERALS 1 conveyed assembling board 2 insulation-displacement joint connector 21 cover 22 housing 23 insulation-displacement terminal 100 connector connecting apparatus 110 casing 140 pressure-receiving table 200 press unit 210 air cylinder (press) 212 flange (shank holder) 220 slide unit 222 elevatable block for checking wires 223 elevatable block for pushing wires 224 elevatable block for mounting a cover 225 shank 230 switching cylinder (switching device) 250 wire checking device (connection-assisting part) 260 wire pushing device (connection-assisting part) 270 cover holder (connection-assisting part) 310 control box (element of a drive controlling means) 320 operation box (element of the drive controlling means) 400 pressure-receiving table 450 wire checking device (connection-assisting part) 460 wire pushing device (connection-assisting part) 470 cover holder (connection-assisting part) 500 press unit 510 casing 540 air cylinder (press) 600 rotatable unit (reciprocally movable unit/transmitting means) 602 rotatable plate (elevatable plate) 620 rotary actuator (switching device) SW start switch SW1 arm switch SW2 press switch W branch wire WH wiring harness

Claims: An insulation-displacement connector connecting apparatus (100) for connecting an insulation-displacement connector (20), preferably an insulation-displacement joint connector (20), having at least one insulation-displacement terminal (23) for connecting, preferably shorting a plurality of wires (W; WH), a housing (22) for receiving the insulation-displacement terminal (23) and a cover (21) to be mounted on the housing (22) with the wires (W; WH) on an assembling board (1) for the wires (W; WH), comprising: a pressure-receiving table (140;) for at least partly receiving the housing (22) of the insulation-displacement connector (20), a press unit (200) comprising, as connection-assisting parts (222-226), a wire pushing device (223) for pushing the wires (W; WH) mounted in the housing (22) on the pressure-receiving table (140; 400) into the insulation-displacement terminal (23) mounted in the housing (22) and a cover holder (224) for holding the cover (21) of the insulation-displacement connector (20) to mount the cover (21) on the housing (22) after the wires (W; WH) are pushed thereinto, and adapted to press the respective connection-assisting parts (223-226), and a drive controlling means (310; 320) for controllably driving the press unit (200; 500) so as to press the wire pushing device (223) and the cover holder (224; 470) as the connection-assisting parts (222-226) in this order characterized in that the pressure-receiving table (140) is mounted on the press unit (200), wherein the pressure-receiving table (140; 400) is movably provided with respect to a casing (510) of the press unit (200; 500) between a mounting position where the wires (W; WH) can be mounted and detached and a pressure-receiving position where it receives pressure from the press unit (200; 500). An insulation-displacement connector connecting apparatus according to claim 1, wherein the press unit (200) further comprises, as a connection-assisting part (222-226), a wire checking device (222) for checking the wires (W; WH) before they are pushed by the wire pushing device (223), and the drive controlling means (310; 320) comprises a discriminating portion for judging (S6) whether or not a state of the wire (W; WH) is satisfactory when the wire checking device (222) of the press unit (200) is driven, and permits (S8) the press unit (200) to drive the wire pushing device (223) and the cover holder (224) if the discriminating portion judges (S6) that the state of the wires (W; WH) is satisfactory and hinders (S7) the operation of the press unit (200; 500) if it judges (S6) that the state of the wires (W; WH) is unsatisfactory. An insulation-displacement connector connecting apparatus according to one or more of the preceding claims, wherein the press unit (200) comprises: a press (210) for performing a pressing operation in correspondence with, preferably right above the pressure-receiving table (140), a reciprocally movable unit (220) adapted to carry the connection-assisting parts (223-226) and reciprocally movable within a range of a specified stroke, a switching device (230) for switchingly setting the respective connection-assisting parts (223-226) at a pressing position set in the press (210) via the reciprocally movable unit (220) in an order of the wire pushing device (223) and the cover holder (224), and a transmitting means (211; 212) for transmitting a driving force of the press (210) to the connection-assisting part (223-226) set at the pressing position. An insulation-displacement connector connecting apparatus according to claim 3, wherein the reciprocally movable unit (220) comprises a shank (211) detachably mountable on a shank holder (212) of the press (210), and an elevatable block (227) provided for each of the connection-assisting parts (223-226) and individually movable towards and away from the pressure-receiving table (140), preferably substantially upward and downward. An insulation-displacement connector connecting apparatus according to claim 3, wherein the reciprocally movable unit comprises an elevatable plate (602) adapted to integrally or unitarily carry the respective connection-assisting parts and directly driven by the press to move towards and away from the pressure-receiving table (140), preferably substantially upward and downward. An insulation-displacement connector connecting apparatus according to one or more of the preceding claims, wherein the pressure-receiving table (140) and the press unit (200) are positioned with respect to each other by means of at least one pin (144) provided on one (140) of the pressure-receiving table (140) and the press unit (200) and by a corresponding recess (144a) provided on the other (200) of the pressure-receiving table (140) and the press unit (200). An insulation-displacement connector connecting method for connecting an insulation-displacement connector (20), preferably an insulation-displacement joint connector (20), having at least one insulation-displacement terminal (23) for connecting preferably shorting a plurality of wires (W; WH), a housing (22) for receiving the insulation-displacement terminal (23) and a cover (21) to be mounted on the housing (22) with the wires (W; WH) on an assembling board (1) for the wires (W; WH), comprising the following steps: positioning the housing (22) of the insulation-displacement connector (20) on a pressure-receiving table (140), wherein the pressure-receiving table (140) is mounted on the press unit (200) and wherein the pressure-receiving table (140) is movably provided with respect to a casing (510) of the press unit (200) between a mounting position where the wires (W; WH) can be mounted and detached and a pressure-receiving position where it receives pressure from the press unit (200), pressing the wires (W; WH) into connection with the insulation-displacement terminal (23) by means of a wire pushing device (223) for pushing the wires (W; WH) and subsequently mounting the cover (21) on the housing (22) after the wires (W; WH) are pushed into the housing by means of a cover holder (224) for holding the cover (21) of the insulation-displacement connector (20). An insulation-displacement connector connecting method according to claim 7, further comprising the step of checking the wires (W; WH) before they are pushed by the wire pushing device (223), wherein it is judged (S6) whether or not a state of the wire (W; WH) is satisfactory when the wire checking device (222; 450) of the press unit (200) is driven, the wire pushing device (223) and the cover holder (224) being driven (S8) if it is judged (S6) that the state of the wires (W; WH) is satisfactory whereas the wire pushing device (223; 460) and the cover holder (224) being hindered (S7) from operation if it judged (S6) that the state of the wires (W; WH) is unsatisfactory.

Inventors: FUJITA KOJI, HASHIMOTO KENJI, ITAI TOSHIO, SHIRAKAWA JUNICHI, FUJITA, KOJI, HASHIMOTO, KENJI, ITAI, TOSHIO, SHIRAKAWA, JUNICHI
Applicants: SUMITOMO WIRING SYSTEMS
Application year: 2001
Main classification: H01R4
IPC codes: H01R4, H01R31, H01R43