CONTACTORS

Abstract: A contactor in which a case proper has a plurality of serially and vertically sectioned pole chambers (2,2′) and the pole chamber is provided with a traveling contact (3,4) and a pair of operation frames (5), and the traveling contact is formed by suspending a support frame (3) made of conduct­ ing material and pivotally fixing a traveling contact bar having an arm portion (12, 12′) extending in right and left directions on the top portion of the support frame (3), and the pair of the operation frames (5) are installed at right and left positions of the traveling contact, and the operation frame is provided with a frame portion having a window (15) and a leg frame portion suspending and extending integrally from one side portion of a lower surface of the frame portion, and a pair of upper and lower contact springs (21, 21′) are provided in the window (15), and the right and left arm portions of the traveling contact run through the window of the operation frame to be sandwiched by the pair of contact springs (21, 21′), and the pair of right and left operation frames are connected interlocking at the lower ends of both the leg frames, and an electromagnet (MCR, MCF) connected to each leg frame and a return spring (19) provided on the lower surface of the frame portion are provided, and at least one traveling contact terminal (13, 13′) is provided at each tip of the right and left arm portions (12, 12′) of the traveling contact bar (4) and stationary contact terminal (24, 24′) is provided at each location corresponding to the traveling contact terminals, and at one side of the pole chamber, at least one connecting terminal is provided, and at the other side of the pole chamber, at least one connecting terminal (22′) is provided.

Description: BACKGROUND OF THE INVENTION: This invention relates to integral unit contactor assemblies for reversible change-over and Y-Δ change-over or change-over for various modes and is composed of a case member, a travelling contact mechanism of metal installed in the case member a stationary contact, and terminals consisting of various terminal bars for electrical connection to the reverse surface of the case member by wirings, whereby the travelling contact mechanism and each terminal are used in common for regular and reversal rotations according to the change-over of the stationary contacts, or are used in common for Y(star) Δ(delta) change-over. Heretofore, various contactor assemblies have been available which correspond to change-over modes such as mere closing and breaking of circuit, change-over of circuit, and Y-Δ change-over in three phase AC, but the contactor assemblies of such types were of one-dimensional contact and are required to be prepared for exclusive uses by combining a plurality of contactors optionally in order to obtain various change-over modes. For example, the contactors used for reversible operation against the operations of automatic doors, valves for gas and fluid are constructed in such a way that two units of electromagnetic contactors for regular and reverse rotations were combined and circuit wirings were provided for contact construction. Therefore, wiring and mounting processes were numerous, and moreover, the wiring operations were extremely difficult in the structure of the conventional contactors, and furthermore, in the large size contactors, installation spaces became larger and the costs were beyond original calculations, resulting in numerous drawbacks of the conventional contactors. US-A-2,606,260 discloses a contactor assembly as defined in the pre-characterizing part of claims 1 and 2 in which a first support for a first travelling contact member is provided adjacent to one end of a panel structure and a second support for a second travelling contact member is provided in spaced relation thereto. Each contact member projects on opposite sides of the respective support in opposite directions and terminates in movable contact terminals which serve to establish alternate electrical connections with the aligned stationary contact terminals supported by the panel structure. These contact members are each simultaneously controlled about the centres of the supports by an arrangement of insulated actuating frames which are mounted for restricted reciprocative movement, respectively. At the other end of the panel structure there are arranged electromagnetic means respectively coupled to the actuating frames. The movement of the actuating frames in opposite directions serves to positively control the rocking movement of the contact members for alternately establishing and breaking electrical connection between the sets of movable and stationary contact terminals. However, such a construction of a contactor assembly does not allow a compact arrangement of a plurality of contact members required for reversible change-over, Y - Δ change-over and so on. US-A-3,582,847 discloses a mechanical switch interlock used for two magnetically actuated relay switches mounted on a common base plate. Up and down pushbutton switches located at a remote control station are connected to terminal groups of the relay switches and wired so as to energize the respective solenoid coil of the relay switches when one of the pushbutton switches is closed. Energization of the respective solenoid coil magnetically attracts an armature downward against return springs. Contact carriers carrying movable contact members are associated with the armature such that downward movement of the armature causes the movable contact members to contact the members to contact the fixed contacts associated with terminal groups of the respective relay switch provided for motor control and power connection, to complete a circuit between said terminal groups. The interlock structure provided to prevent simultaneous actuation of both relay switches comprises a pair of rods which are inserted in appropriate holes in the relay switch housings and a channel member affixed to said rods. The channel member is provided with a pair of rollers. Horizontal movement of the channel member causes the rods to move axially. Four springs bias the two rods and the channel member toward a neutral position between the two relay switches. When the armature of one relay switch is attracted downwardly by virtue of energization of its solenoid coil, a cam surface of a bar fixed to the armature cooperates with the respective roller of the channel member to translate the vertical movement of the armature into horizontal movement of the interlock rods, whereby the distal rod ends within the non-activated switch are urged under a transverse member fixed to each armature tp prevent the movable contact members abd the fixed contacts from contacting each other. The above mentioned switch structure however, is not suitable for a change-over switch. Furthermore, US-A-3 368 171 discloses a four-pole contactor providing four separate controlled conducting path extending lengthwise through the contactor. Each of the four conducting paths is separate and electrically insulated from the adjacent paths by means of insulating pole chambers that are moulded integral with the housing part. Each conducting path comprises a separate contact member bridging two separated stationary contact terminals. Each of the bridging contact members is supported on a contact carrier in a separate one of window openings. In each of the openings a separate compression spring biases a spring support against the associated bridging contact member to retain the contact member in place and to provide for resilient contact engagement. The contact carrier further comprises a magnetic armature which is pulled against the bias of the springs into engagement with a magnetic core member. During this movement, the springs are compressed and the four bridging contact members are moved into engagement with the stationary contact terminals, whereby each of the bridging contact members closes a circuit between the associated stationary contact terminals. When the coil is de-energized, the springs will expand, moving the contact carrier together with the four bridging contact members upwards to open the circuit. The above mentioned structure of a four-pole contactor allows compact dimensions, but there is no possibility to provide a compact change-over contactor with integral structure. SUMMARY OF THE INVENTION: An object of this invention is to provide contactors assembled for change-over in which travelling contacts and stationary contacts and terminals R, S, T, U, V, W and X, Y, Z are used for regular and revere rotations in common and they are formed into an integral unit, and as a result, this invention has eliminated the various difficulties with regard to the cost load and the wirings owing to the combinations of two units of contactors for regular and reverse rotations like those of the conventional contactors. Another object of this invention is to provide a contactor assembled for Y-Δ change-over in which a contact mechanism and terminals R, S, T, U, V, W and X, Y, Z are provided in an integral unit for common use for Y - Δ change-over. A still further object of this invention is to provide a compact size contactor assembled for reversible change-over or for Y-Δ change-over by forming a contact mechanism and each terminal for primary side and secondary side for regular and revere rotations or for Y - Δ circuit in common. A yet still further object of this invention resides in the adoption of a metal travelling contact mechanism. As a result, a provision of a multi-purpose contactor by arrangement of the stationary contacts is made variable, and the contact mechanism and the terminals are used in common for regular and revere rotation or for Y - Δ circuit so that the multi-purpose contactor is provided. A separate object of this invention resides in that each terminal for primary side and secondary side is formed of a terminal bar for electrical connection by wiring on the reverse surface of the case member, and a circuit wiring process for construction of contacts of each terminal for the primary side and the secondary side is extremely easy work. Another separate object of this invention is to provide an electromagnetic contactor in which each terminal is selected optionally to be able to form a contact construction corresponding to regular and reverse rotation change-over or Y-Δ change-over or for various modes for change-over, and as a result, the wiring process is only carried out by causing the electrical connection of the terminal to correspond to various modes, and thus, the contactor for regular and reverse rotation change-over or Y-Δ change-over and change-over for various modes can be manufactured from the identical structure. A still separate object of this invention is to provide an electromagnetic contactor in which auxiliary contacts are integrally provided. The invention is defined in claim 1. Another aspect of the invention is defined in independent claim 2. Particular embodiments of the invention are set out in the dependent claims. BRIEF DESCRIPTION OF THE DRAWINGS: The invention is described in detail below with reference to the drawings, in which: Fig. 1 is a perspective view of the reversible change-over contactor assembly in which the contact mechanism is illustrated in partial section, Fig. 2 is a side view showing the part in cross section, Fig. 3 is a plan view of the assembly, Fig. 4 is a vertical cross section showing the OFF condition of the contact construction of the main contact, Fig. 5 is a perspective view of the disassembled traveling contact, Fig. 6 is a vertical cross section showing the regular operating condition, Fig. 7 is a vertical cross section showing the contact construction of the auxiliary contacts in the OFF condition, Fig. 8 is a circuit diagram showing the contact construction of the reversible change-over, Fig. 9 is a circuit diagram showing the contact construction for change-over, Fig. 10 is a plan view showing the reversible change-over contact according to another embodiment of this invention, Fig. 11 is a vertical cross section showing the contact construction of the main contact in the OFF condition, Fig. 12 is a circuit diagram corresponding to the assembly of Fig. 11, Fig. 13 is a plan view showing the Y-Δ contactor according to the other embodiment of this invention, Fig. 14 is a vertical cross section showing the contact construction of the main contact in the OFF condition and Fig. 15 is the corresponding circuit diagram. DETAILED DESCRIPTION OF THE INVENTION: Fig. 1 shows the electromagnetic contactor for regular and reverse rotation change-over, wherein a case member S' is formed by providing side by side three pole chambers 2 for main contacts which are vertically sectioned by a plurality of diaphragms 1, and two pole chambers 2' for auxiliary contacts. Each pole chamber 2 and 2' for the main contact and auxiliary contact is provided with a travelling contact mechanism having swivellable travelling contacts and connecting terminals composed of terminal bars for wiring on the lower surface of the case member S'. Two electromagnets MCF and MCR are provided for regular and revere rotations on the lower surface of the case member S'. The travelling contact mechanism for the main contact is formed by the combination of a support frame 3 made of conducting material and a travelling contact bar 4 and a pair of actuating frames 5 as shown in Figs. 3 through 5. The support frame 3 is bent U-like and provided with a bottom portion 6 and two sheets of vertical frame portions 7, and a bearing portion 8 formed with a vertical groove is formed on the upper end of the vertical frame portion 7. The support frame 3 is fixed to a base portion 9 at the bottom portion 6 in the centre bottom portion of the case member S' by means of a screw 10. The travelling contact bar 4 is provided with a bearing portion 11 in the centre portion and right and left arm portions 12 and 12' are integrally and horizontally extended. Travelling main contact terminals 13 and 13' are provided on the lower surface of the tips of each right and left arm portions 12 and 12'. The bearing portion 11 of the travelling contact bar 4 is pivotally fixed to the bearing portion 8 of the support frame 3 by means of a shaft 14. Each actuating frame 5 is formed with an vertical leg portion 17 being part of the frame 5 and extending from one side of a lower surface of the frame portion 16 of the actuating frame 5 forming a rectangular window 15. An axial hole 18 is formed on the lower end of the leg portion 17, and a projecting member 20 for installing a return spring 19 is provided on the lower surface of the frame portion 16. The pair of the actuating frames 5 is installed vertically slidably at both sides of the support frame 3, and the right and left arm portions 12 and 12' of the travelling contact bar 4 extend through the windows 15 of the right and left actuating frames 5 respectively. In each window 15 of the right and left actuating frames 5, a pair of vertical contact springs 21 and 21' are fixed at upper ends and lower ends of the windows 15, and each arm portion 12 and 12' of the travelling contact bar 4 running through the window 15 is resiliently sandwiched between the free ends of the vertical contact springs 21 and 21'. The two pairs of vertical contact springs 21 and 21' are arranged to have the same elastic modulus and to position and retain the travelling contact bar 4 horizontally in the OFF condition. Two main contact connecting terminals 22 and 23 are disposed in staggered positions at the left side of the case member S' so as to be at a lower position on the outside and an upper position on the inside respectively, and similarly, two main contact connecting terminals 22' and 23' are disposed in staggered positions at the right side thereof so as to be at the lower position on the outside and at the upper position on the inside. Stationary main contact terminals 24 and 24' are disposed at positions corresponding to the swivelling operations of the travelling main contact terminals 13 and 13' provided on the lower surfaces of the right and left ends of the travelling contact bar 4. The stationary main contact terminal 24 is connected to the main contact terminal 23 by means of a contact bar 25 and the stationary main contact terminal 24' is connected to the main contact connecting terminal 23' by means of a contact bar 25'. The main contact connecting terminals 22, 23 and 22', 23' are provided with terminal bars 27 each of which having a wiring portion 26 projecting to the lower surface of the case member S', and similarly, the support frame 3 of the travelling contact bar 4 is fixed to the base portion 9 by means of a terminal bar 27 having the wiring portion 26. The terminal bars 27 have various shapes and lengths according to the respective mounting positions and the wiring portions 26 project on the lower surface of the case member S'. A flat plate 29 is disposed over the upper surface of a mount 28 that houses the two electromagnets MCF and MCR. A bearing portion 30 (Fig. 2) is provided on the lower surface of the flat plate 29 and a connecting lever 31 is pivotally fixed to the the bearing portion 30 in the centre portion. The lower ends of of the left and right leg portions 17 provided with the axial holes 18 and travelling iron cores 32 and 32' of electromagnets MCF and MCR are coaxially pivotally fixed at both right and left ends of the connecting lever 31. The return spring 19 is installed between the projecting member 20 provided on the lower surface of the frame portion 16 of the actuating frame 5 and a depressed portion 33 provided on the flat plate 29 of the mount 28. The travelling contact mechanism for the auxiliary contact as shown in Fig. 7 is formed by assembling the support frame 3 and the travelling contact bar 4 and the right and left operation frames 5 similar entirely to the travelling contact mechanism for the main contact, with the travelling contact bar 4 being swivellably operated by the lifting motion of the right and left actuating frames 5. However, the travelling contact bar 4 for the auxiliary contacts is provided with auxiliary travelling contacts 34, 34', 35, 35' at four locations on the upper surface and lower surface of each tip of the right and left arm portions 12 and 12', and four pieces of auxiliary contact stationary terminals 36, 36', 37, 37' corresponding to the four auxiliary contact travelling terminals 34, 34', 35, 35' are connected to locations corresponding to the swivelling operations of each auxiliary contact travelling terminals 34, 34', 35, 35' in the upper and lower parts of the right and left of the travelling contact bar 4 and are connected to auxiliary contact terminals 38, 38', 39, 39'. These auxiliary contact terminals 38, 38', 39 and 39' are disposed in staggered manner at a lower stage on the outside and at an upper stage on the inside of the right and left of the case member S' similar to the main contact connecting terminals 22, 22', 23, 23', wherein the stationary terminal 36 is connected to the terminal 38, the stationary terminal 37 is connected to the terminal 39, the stationary terminal 36' is connected to the terminal 38', and the stationary terminal 37' is connected to the terminal 39' respectively. The travelling contact mechanism for the auxiliary contact has a construction in which, in order to form a b-contact in the Off condition, two kinds of long and short contact springs 40 and 40', whose resilient forces are identical, are installed in the window 15 of the operation frame 5 as a pair and the travelling contact bar 4 is retained in an inclined mode in which the auxiliary travelling controls 34' and 35' thereof are in contact with the stationary contacts 37 and 36', respectively, as shown in Fig. 7. In this case, the respective travelling contact bars 4 in the auxiliary contact pole chambers 2' for regular and reverse rotations, respectively, are crossed orthogonally to construct the b contact whereby the wiring is conveniently formed. By the way, said left and right actuating frames 5 provided in each pole chamber 2,2' are serially and integrally formed as shown in Fig. 5, wherein the leg portion 17 is suspended only on the lower surface of the actuating frames 5 positioned at each end of said assembly. Beside each leg portion 17 one return spring 19 is provided. The main contact connecting terminals 22 of the three pole chambers for the main contact of the case member S' are set to be the connecting terminals R, S, T, the connecting terminals 23 are set to be the connecting terminals Z, X, Y, the connecting terminals 23' are set to be the connecting terminals U, V and W, and the connecting terminals 22' are set to be the connecting terminals Mc, Mf, Mr to be connected to the electromagnets MCF and MCR for regular and reverse rotations, the connecting terminal 38 of each auxiliary contact pole chamber 2' for regular and reverse rotation is set to be 1a or 1b', the connecting terminal 39 is set to be 1b or 1a', the connecting terminal 38' is set to be 1b' or 1a, and the connecting terminal 39' is set to be 1a' or 1b. The respective main contact connecting terminals 22, 23, 22' and 23' connect the terminals R, S, T to each travelling contact of each of the three pole chambers 2 by means of the wiring portion 26 of each terminal bar 27, whereby the contact is formed by connecting the connecting terminals U and X and the connecting terminals V and Y and the connecting terminals W and Z. This invention has the foregoing construction, so that the travelling contact bar 4 of the main contact is positioned horizontally by the contact springs 21 and 21' in the OFF condition, and the main contact travelling terminals 13 and 13' and the main contact stationary terminals 24 and 24' are separated, and the travelling contact bar 4 of the auxiliary contact is caused to be inclined by the long and short contact springs 40 and 40', and is connected to the b contact. When the electromagnet MCF for regular rotation is excited, the travelling iron core 32' is attracted and the actuating frame 5 at the regular rotation side descends by loading the spring 19, and the main travelling terminal 13' and the main contact stationary terminal 24', namely, the connecting terminals U, V and W are connected. Simultaneously, in the auxiliary contact the b-contact is open and the a-contact is closed. Each travelling contact bar 4 of the main contact and the auxiliary contact is constructed in such a way that the pair of the upper and lower contact springs 21 and 21' and 40 and 40' elongate or contact, wherein a contact is maintained with the proper contact pressure. Since the power source connecting terminals R, S and T are connected to the travelling contact bar 4, as shown in the wiring diagram of Fig. 8, R-U-X, S-V-Y and T-W-Z are connected, and the circuit for regular rotation is closed. When the excitation of the electromagnet MCF for regular rotation is released, the actuating frame 5 restores by the return spring 19. Next, when the electromagnet MCR for reverse rotation is excited, the main contact travelling terminal 13 and the main contact stationary terminal 24, namely, the connecting terminals Z, X and Y are connected, and as shown in Fig. 8, R-Z-W, S-X-U and T-Y-V are connected and the circuit for reverse rotation is closed. Simultaneously, the a-contact is opened and the b-contact is closed. As described in the foregoing, the main contact connecting terminals 22, 22', 23, 23' are used in common for regular and reverse rotations, and the reversible change-over can be effected. Furthermore, only by changing the wiring of the terminal bar 27, the contact construction can be simply formed as the change-over contactor as shown in the circuit diagram of Fig. 9. Fig. 10 through Fig. 12 show a reversible change-over electromagnetic contactor according to another embodiment of this invention. In respect of the arrangement of the case member S', the travelling contact mechanism and the connecting terminals, it is entirely similar to the reversible change-over electromagnetic contactor shown in Fig. 1 through Fig. 7. Namely, the case member S' is formed by providing side by side the three pole chambers 2 for main contacts and the two pole chambers 2' for auxiliary contacts as shown in Fig. 10, and the pole chamber 2 for the main contact is assembled by the support frame 3, the travelling contact bar 4 and the pair of the actuating frames 5 as shown in Fig. 11, wherein the contact bar 4 is horizontally positioned and sandwiched by a pair of vertically disposed contact springs 21 and 21 in the OFF condition, and swivellably operated according to the lifting motion of the respective actuating frames 5. The main contact terminals 22, 22', 23, 23' are disposed at a lower stage on the outside and at an upper stage on the inside at the right and left of the case member S'. However, in this embodiment, the main contact traveling terminals 41, 41', 42 and 42' are provided at four locations, namely at the upper surface and the lower surface of the right and left arm portions 12 and 12' of the travelling contact bar 4 of the main contact. Accordingly four main contact stationary terminals 43, 43', 44, 44' corresponding to the four main contact travelling terminals 41, 41', 42, 42', are disposed at locations corresponding to the swivelling operations of the travelling terminals 41, 41', 42, 42' in the upper and lower parts of the right and left of the travelling contact bar 4. The main contact stationary terminals 43 and 44 are connected to the main contact connecting terminal 23 by means of contact bars 45 and 46, and the main contact stationary terminal 44' is connected to the main contact connecting terminal 23' by means of a contact bar 47, and the main contact stationary terminal 43' and the main contact terminals 22, 22', 23' are provided with a wiring portion 26 provided on the respective terminal bar 27 and projecting to the lower surface of the case member S. As shown in Fig. 10, the connecting terminals 23 are set to be R, S, T and the connecting terminals 22' are set to be U, V, W, and the connecting terminals 23' are set to be Z, X, Y, and, as shown in Fig. 12, the connecting terminals Z and U, X and V, Y and W are connected by means of the wiring portions 26 provided on the respective terminal bars 27. The stationary terminal 43' beside the connecting terminals Z and U is connected to the connecting terminal Y, the stationary terminal 43' beside the connecting terminals X and V is connected to the connecting terminal Z and the stationary terminal 43' beside the connecting terminals Y and W is connected to the connecting terminal X. Also, the auxiliary contact has a contact construction entirely identical with the embodiment shown in Fig. 7 so that the description is hereby omitted. When the electromagnet MCF at the regular rotation side is excited, the terminals R-Z-U, S-X-V and T-Y-W are connected, and the regular rotation circuit is closed or turned ON, and when the electromagnet MCR at the reverse rotation is excited, the terminals R-Y-W, S-Z-U and T-X-V are connected and the reverse rotation circuit is turned ON or closed. Furthermore, Fig. 13 to Fig. 15 show the Y-Δ electromagnetic contactor according to another embodiment. The contactor is composed of the case member S' the travelling contact mechanism, main contact connecting terminals and four main contact stationary terminals having the same construction as shown in the embodiment of Fig. 11, and are illustrated by the same symbol. As shown in Fig. 14, the main contact connecting terminals 22 and 23 are connected by means of a terminal bar 47, and the main contact connecting terminal 23 is connected to the main contact stationary terminal 44 by means of a contact bar 48, wherein the main contact connecting terminal 23' connects the main contact stationary terminals 43' and 44' by means of contact bars 49 and 50, and the main contact stationary terminal 43 is wired as a common contact S'' by means of the wiring portion 26 of the terminal bar 27 as shown with dotted line in the circuit diagram of Fig. 15. The connecting terminals 22 are set to be the connecting terminals R, S, T, and the terminals 23 are set to be the connecting terminals U, V, W, and the terminals 23' are set to be the connecting terminals Z, X, Y. When the electromagnet MCS for Y(star)-circuit is excited, the terminals R-U-Z, S-V-X and T-W-Y are connected to form the Y-circuit. When the electromagnet MCD for Δ(delta)-circuit is excited, the Δ-circuit is formed by means of the common contact S''. Accordingly , this invention provides a reversible change-over contactor or a Y-Δ change-over contactor which allows multi-purpose contacting of the contact by forming the metal travelling contact, and as a result, the connecting terminals R, S, T, U, V, W and X, Y, Z are used in common for the regular and reverse rotation change-over or for Y-Δ change-over as an integral unit, and therefore, this invention has eliminated the various difficulties such as high cost and expensive wiring resulting from the provision of two contactors for regular and reverse rotations or two contactors for Y and Δ-circuit like in the conventional reversible contactors or Y-Δ change-over contactors. Moreover, this invention can provide a contactor having a supercompact size, and moreover the wiring process for the contact construction can easily be performed as the wiring construction is made on the lower surface of the case member by a wiring portion provided on the terminal bar. Furthermore 2 contact system Y-Δ contactors or 3 contact system Y-Δ contactors can be easily and optionally manufactured in the identical structural unit by changing the connection and wiring through various formations of the contact bars of the stationary contact and the terminal bars, which are advantageous features of this invention.

Claims: A contactor assembly comprising a case member (S'), travelling contact members each of which including a support member (3) being made of conducting material and a travelling contact bar (4) arranged on the support member, said travelling contact bar (4) having an arm portion (12) extending in the left direction, an arm portion (12') extending in the right direction and at least one travelling contact terminal (13, 13') provided at the tip of each of said left and right arm portions (12, 12'), respectively, right and left actuating frames (5) liftably arranged adjacent the right and left arm portions (12, 12') of the travelling contact bar (4) and interlockingly connected to electromagnetic means (MCR, MCF; MCD, MCS) for actuating said travelling contact bar (4), return springs (19), stationary contact terminals (24, 24') provided in the path of movement of the travelling contact terminals (13, 13') and connecting terminals (22, 23, 22', 23'), characterized in that the support member (3) is formed frame-like for pivotally fixing the travelling contact bar (4) on the top thereof, that the case member (S') is provided with a plurality of pole chambers (2, 2') being arranged side by side along the longitudinal axis of the assembly and vertically sectioned by diaphragms (1) and each of which housing one of said travelling contact members and the corresponding right and left actuating frames (5), that at least two connecting terminals (22, 23) are provided at one side of the case member (S') and at least one connecting terminal (22', 23') is provided at the other side thereof, that each of said actuating frames (5) is formed with a window (15) through which the adjacent arm portion (12, 12') of said travelling contact bar (4) extends, and includes a pair of upper and lower contact springs (21, 21') arranged in said window (15) for sandwiching said arm portion (12, 12') therebetween and a vertical leg portion (17) being part of the frame (5) and extending downwardly from one side of the lower surface of said frame (5), said right and left actuating frames (5) being interlockingly connected at the lower ends of said leg portions (17) with the electromagnetic means (MCR, MCF; MCD, MCS), that the return springs (19) are installed between the lower surface of said actuating frames and said electromagnetic means, and that corresponding to the respective switching function of the assembly at least some of the connecting terminals (22, 22', 23, 23') are provided with a terminal bar (27) having a wiring portion (26) projecting on the lower surface of the case member (S'). A contactor assembly comprising a case member (S'), travelling contact members each of which including a support member (3) being made of conducting material and a travelling contact bar (4) arranged on the support member, said travelling contact bar (4) having an arm portion (12) extending in the left direction, an arm portion (12') extending in the right direction and at least one travelling contact terminal (13, 13') provided at the tip of each of said left and right arm portions (12, 12'), respectively, right and left actuating frames (5) liftably arranged adjacent the right and left arm portions (12, 12') of the travelling contact bar (4) and interlockingly connected to electromagnetic means (MCR, MCF; MCD, MCS) for actuating said travelling contact bar (4), return springs (19), stationary contact terminals (24, 24') provided in the path of movement of the travelling contact terminals (13, 13') and connecting terminals (22, 23, 22', 23'), characterized in that the support member (3) is formed frame-like for pivotally fixing the travelling contact bar (4) on the top thereof, that the case member (S') is provided with a plurality of pole chambers (2, 2') being arranged side by side along the longitudinal axis of the assembly and vertically sectioned by diaphragms (1) and each of which housing one of said travelling contact members and the corresponding right and left actuating frames (5), that at least two connecting terminals (22, 23) are provided at one side of the case member (S') and at least one connecting terminal (22', 23') is provided at the other side thereof, that each of said actuating frames (5) is formed with a window (15) through which the adjacent arm portion (12, 12') of said travelling contact bar (4) extends, and includes a pair of upper and lower contact springs (21, 21') arranged in said window (15) for sandwiching said arm portion (12, 12') therebetween, that the right actuating frames are formed side by side along the longitudinal axis of the assembly as one part and a vertical leg portion (17) is suspended on the lower surface of the right actuating frames at each end of said assembly, that the left actuating frames are formed side by side along the longitudinal axis of the assembly as one part and a vertical leg portion (17) is suspended on the lower surface of the left actuating frames at each end of said assembly, that said right and left actuating frames (5) are interlockingly connected at the lower ends of said leg portions (17) being part of the respective frames with the electromagnetic means (MCR, MCF; MCD, MCS), that the return springs (19) are installed between the lower surface of said actuating frames and said electromagnetic means, and that corresponding to the respective switching function of the assembly at least some of the connecting terminals (22, 22', 23, 23') are provided with a terminal bar (27) having a wiring portion (26) projecting on the lower surface of the case member (S'). The contactor assembly according to claim 1 or 2, characterized in that the upper and lower contact springs (21, 21') are formed to have the same length dimension and the same elastic modulus. The contactor assembly according to claim 1 or 2, characterized in that the upper and lower contact springs (21, 21') are fixed to the upper and lower ends, respectively, of the window (15) provided in each of said actuating frames (5), and the respective free ends are guided to vertically expand and contract parallel to the leg portion (17). The contactor assembly according to claim 1 or 2, characterized in that a bearing member (30) is provided under the lower surface of a flat plate (29) covering the mount (28) for the electromagnetic means (MCR, MCF; MCD, MCS) and a connecting lever (31) is pivotally fixed to the bearing member (30) at its centre portion, the leg portion (17) of the left actuating frame (5) being pivotally fixed to the left end of the connecting lever (31) and the leg portion (17) of the right actuating frame (5) being pivotally fixed to the right end of the connecting lever (31). The contactor assembly according to claim 1 or 2, characterized in that a respective travelling contact terminal (13, 13') is provided on the lower surface of the tip of each of the right and left arm portions (12, 12'), that a respective stationary contact terminal (24, 24') is provided at least at the lower position in the path of movement of each of said right and left travelling contact terminals (13, 13'), that three pole chambers (2) are provided, that the one connecting terminal (22) provided at the one side of the first pole chamber (2) is set to be a R-terminal; the one connecting terminal (22) provided at the one side of the second pole chamber (2) is set to be a S-terminal; and the one connecting terminal (22) provided at the one side of the third pole chamber (2) is set to be a T-terminal; that the other connecting terminal (23) provided at the one side of the first pole chamber (2) is set to be a Z-terminal; the other connecting terminal (23) provided at the one side of the second pole chamber (2) is set to be a X-terminal; and the other connecting terminal (23) provided at the one side of the third pole chamber (2) is set to be a Y-terminal; that the connecting terminal (23') provided at the other side of the first pole chamber (2) is set to be a U-terminal; the connecting terminal (23') provided at the other side of the second pole chamber (2) is set to be a V-terminal; and the connecting terminal (23') provided at the other side of the third pole chamber (2) is set to be a W-terminal; that the stationary contact terminal (24) provided at the one side of the first pole chamber (2) is connected to the Z-terminal by a contact bar (25); the stationary contact terminal (24) provided at the one side of the second pole chamber (2) is connected to the X-terminal by a contact bar (25); and the stationary contact terminal (24) provided at the one side of the third pole chamber (2) is connected to the Y-terminal by a contact bar (25); that the stationary contact terminal (24') provided at the other side of the first pole chamber (2) is connected to the U-terminal by a contact bar (25'); the stationary contact terminal (24') provided at the other side of the second pole chamber (2) is connected to the V-terminal by a contact bar (25'); and the stationary contact terminal (24') provided at the other side of the third pole chamber (2) is connected to the W-terminal by a contact bar (25'); that the R-terminal is connected to the travelling contact member (4) of the first pole chamber (2), the S-terminal is connected to the travelling contact member (4) of the second pole chamber (2) and the T-terminal is connected to the travelling contact member (4) of the third pole chamber (2); that the Z-terminal is connected to the W-terminal; the X-terminal is connected to the U-terminal; and the Y-terminal is connected to the V-terminal, and that the terminals R, S, T, Z, X, Y, U, V and W are each connected by the respective wiring portion (26) thereof; whereby a contact construction for reversible change-over is provided. The contactor assembly according to claim 1 or 2, characterized in that on the respective upper and lower surfaces of the tip of each of the right and left arm portions (12, 12') a respective travelling contact terminal (41, 41', 42, 42') is provided, that in the lower and upper positions in the path of movement of each of said right and left travelling contact terminals, respectively, a respective stationary contact terminal (43, 43', 44, 44') is provided, that three pole chambers (2) are provided, that the connecting terminal (23) provided at the one side of the first pole chamber (2) is set to be a R-terminal; the connecting terminal (23) provided at the one side of the second pole chamber (2) is set to be a S-terminal; and the connecting terminal (23) provided at the one side of the third pole chamber (2) is set to be a T-terminal; that the one connecting terminal (23') provided at the other side of the first pole chamber (2) is set to be a Z-terminal; the one connecting terminal (23') provided at the other side of the second pole chamber (2) is set to be a X-terminal; and the one connecting terminal (23') provided at the other side of the third pole chamber (2) is set to be a Y-terminal; that the other connecting terminal (22') provided at the other side of the first pole chamber (2) is set to be a U-terminal; the other connecting terminal (22') provided at the other side of the second pole chamber (2) is set to be a V-terminal; and the other connecting terminal (22') provided at the other side of the third pole chamber (2) is set to be a W-terminal; that the stationary contact terminals (43, 44) provided in the lower and upper positions at the left side of the first pole chamber (2) are connected to the R-terminal by contact bars (45, 46); the stationary contact terminals (43, 44) provided in the lower and upper positions at the left side of the second pole chamber (2) are connected to the S-terminal by contact bars (45, 46); and the stationary contact terminals (43, 44) provided in the lower and upper positions at the left side of the third pole chamber (2) are connected to the T-terminal by contact bars (45, 46); that the stationary contact terminal (44') provided in the upper position at the right side of the first pole chamber is connected to the Z-terminal by a contact bar (47); the stationary contact terminal (44') provided in the upper position at the right side of the second pole chamber (2) is connected to the X-terminal by a contact bar (47); and the stationary contact terminal (44') provided in the upper position at the right side of the third pole chamber (2) is connected to the Y-terminal by a contact bar (47); that the stationary contact terminals (43') provided in the lower positions at the right side of the three pole chambers and the terminals Z, X, Y, U, V and W are each provided with a respective terminal bar (27) having the wiring portion (26) projecting on the lower surface of the case member (S') for respective connection; that the stationary contact terminal (43') provided in the lower position at the right side of the first pole chamber (2) is connected to the Y-terminal; the stationary contact terminal (43') provided in the lower position at the right side of the second pole chamber (2) is connected to the Z-terminal; and the stationary contact terminal (43') provided in the lower position at the right side of the third pole chamber (2) is connected to the X-terminal; and that the Z-terminal is connected to the U-terminal; the X-terminal is connected to the V-terminal; and the Y-terminal is connected to the W-terminal; whereby a contact construction for reversible change-over is provided. The contactor assembly according to claim 1 or 2, characterized in that on the respective upper and lower surfaces of the tip of each of the right and left arm portions (12, 12') a respective travelling contact terminal (41, 41', 42, 42') is provided, that at the upper and lower positions in the path of movement of each of said right and left travelling contact terminals, respectively, a respective stationary contact terminal (43, 43', 44, 44') is arranged, that three pole chambers (2) are provided, that the one connecting terminal (22) provided at the one side of the first pole chamber (2) is set to be a R-terminal; the one connecting terminal (22) provided at the one side of the second pole chamber (2) is set to be a S-terminal and the one connecting terminal (22) provided at the one side of the third pole chamber (2) is set to be a T-terminal; that the other connecting terminal (23) provided at the one side of the first pole chamber (2) is set to be a U-terminal; the other connecting terminal (23) provided at the one side of the second pole chamber (2) is set to be a V-terminal; and the other connecting terminal (23) provided at the one side of the third pole chamber (2) is set to be a W-terminal; that the connecting terminal (23') provided at the other side of the first pole chamber (2) is set to be a Z-terminal; the connecting terminal (23') provided at the other side of the second pole chamber (2) is set to be a X-terminal; and the connecting terminal (23') provided at the other side of the third pole chamber (2) is set to be a Y-terminal; that the stationary contact terminal (44) provided in the upper position of the left side of the first pole chamber (2) is connected to the U-terminal by a contact bar (48); the stationary contact terminal (44) provided in the upper position of the left side of the second pole chamber (2) is connected to the V-terminal by a contact bar (48); and the stationary contact terminal (44) provided in the upper position of the left side of the third pole chamber (2) is connected to the W-terminal by a contact bar (48); that the stationary contact terminals (43) provided in the lower positions at the left side of the three pole chambers (2) are each provided with a respective terminal bar (27) having the wiring portion (26) projecting on the lower surface of the case member (S') for respective connection; that the stationary contact terminal (43) provided in the lower position of the left side of the first pole chamber (2), the stationary contact terminal (43) provided in the lower position of the left side of the second pole chamber (2) and the stationary contact terminal (43) provided in the lower position of the left side of the third pole chamber (2) are connected to form a common terminal (S''); that the stationary contact terminals (44', 43') provided in the upper and lower positions of the right side of the first pole chamber (2) are connected to the Z-terminal by contact bars (49, 50); that the stationary contact terminals (44', 43') provided in the upper and lower positions of the right side of the second pole chamber (2) are connected to the X-terminal by contact bars (49, 50); and that the stationary contact terminals (44', 43') provided in the upper and lower positions of the right side of the third pole chamber (2) are connected to the Y-terminal by contact bars (49, 50); that the R-terminal is connected to the U-terminal by a contact bar (47); the S-terminal is connected to the V-terminal by a contact bar (47); and the T-terminal is connected to the W-terminal by a contact bar (47); whereby a contact construction for Y - Δ change-over is provided. The contactor assembly according to claim 1 or 2, characterized in that there are provided adjacent to the plurality of pole chambers (2) auxiliary contact pole chambers (2') having the same construction as said pole chambers (2) with the exception that the right and left actuating frames (5) liftably arranged in each of said auxiliary contact pole chambers (2') include in each window (15) short and long contact springs (40, 40') having the same elastic modulus, such that said travelling contact bar (4) of the auxiliary contact is inclined at a predetermined angle when said travelling contact bar (4) in each of said pole chambers (2) is at a neutral position.

Inventors: MIYAMOTO, MOTOMU
Applicants: ICHIEMON SHOSHA COMPANY LTD.
Application year: 1983
Main classification: H01H50
IPC codes: H01H51, H01H50