A LOCKING DEVICE

Abstract: A locking device for fixedly locking a chain in a substrate comprises a yoke (32) engaging with the chain and being insertable in the locking device and fixedly lockable therein by means of a locking cylinder (28). According to the invention, the locking device has a base portion (1) with a hole (22) intended for an anchorage bolt, and a hood (11) which outwardly encloses the locking device and which, together with the yoke (32), is fixedly lockable in the base portion (1) by means of the locking cylinder (28). The base portion (1) has undercut grooves (9, 10) with shoulders (17, 18) and foot portions (15, 16) which are bent at an angle to the hood and are insertable in the grooves to a position determined by the shoulders. Furthermore, the hood (11) and the yoke (32) have mutually cooperating surfaces (12, 13; and 36, 37), respectively) which, in the locked position of the yoke (11) on the locking device, prevent withdrawal of the hood (11). In its inserted position in the locking device, the shanks (34, 35) of the yoke (32) are supported against the inside of the hood (11) and against a guide portion (6, 7, 20, 21) which also serves as a back plate for a bolt bar (31) which engages in recesses (40, 41) in the shanks and thereby locks the yoke.

Description: TITLE OF INVENTION: A LOCKING DEVICE TECHNICAL FIELD The present invention relates to a locking device which is in¬ tended to permit the fixed locking of, for example a chain, at the same time as that locking member, suitably a screw, which is em- ployed for anchorage of the locking device proper, is rendered in¬ accessible in the locked state of the locking device. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS The nature of the present invention and its aspects will be more readily, understood from the following brief description of the accompanying Drawings, and discussion relating thereto. In the accompanying Drawings: Fig. 1 is a perspective view of the locking device in the locked state; Fig. 2 is a plan view of the locking device, with its locking hood dismounted; Fig. 3 is a side elevation of the locking device with the locking hood dismounted; Fig. 4 is an end elevation of the locking device of fig. 3, seen from the left; Fig. 5 is an end elevation of the locking device of Fig. 3, seen from the right; Fig. 6 is a plan view of the insert member which is fixedly anchored in the locking device proper; and Fig. 7 is an end elevation of a modified embodiment of a base portion of the locking device. DESCRIPTION OF PREFERRED EMBODIMENT It will be apparent to the skilled reader of Fig. 1 that the locking device according to the present invention has a base 2 portion 1 which as a substantially planar bottom face 2 and two side edges 3 and 4 bent upwardly approximately at right angles therefrom. As a result, the base portion will assume the configu¬ ration of a shallow U. A spacer 5 is fixedly disposed in the base portion 1, in the longitudinal direction thereof, the spacer extending throughout the entire length of the base portion. At one end of the locking device, a guide member is mounted on the spacer 5 and has an outer end piece 6 and an inner end piece 7. Both of the end pieces are provided with lower edges 8 which are parallel to the bottom face 2 of the base portion 1, there being thereby created two elongate spaces 9, and 10 respectively, between the underface 8 of the guide member and upper face of the base por¬ tion 1, these spaces extending along the entire length of the base portion 1. A hood 11 is disposed about and over both of the end pieces 6 and 1 , as well as the rest of the locking device proper. The hood ' 11 has two side walls 12 and 13 which are interconnected, on the upper side of the locking device, by the intermediary of an arched wall 14, whereby an approximately U-shaped cross section will be imparted to the hood. Inwardly directed portions 15 and 16 are dis¬ posed along the under edges of both of the side walls 12 and 13, and may be accommodated in the two elongate spaces 9 and 10 between the bottom face 2 and the under idges 8 of the end pieces 6 and 7. As a result, the hood 11 will be shiftable in its longitudinal dir¬ ection interiorly between the two side edges 3 and 4 of the base portion 1. As will be apparent from Figs. 4 and 5, the widths of the two elongate spaces 9 and 10 are different at the two ends of the locking device. Thus, the width is less at the right-hand end of the locking device, as shown in Figs. 2 and 3, than at the left- hand end of the locking device. Abutment members, or shoulders, 17 and 18 are disposed between these portions of different width of the two elongate spaces 9 and 10, the abutment members being suit- ably located, in the longitudinal direction of the locking device, beneath the guide member. Correspondingly, there are disposed abut¬ ment members (not shown on the Drawings) in both of the 3 inwardly directed portions 15 and 16, so that the hood 11 is there¬ by prevented from being shifted further in a direction to the right than is apparent from Fig. 1, in that the abutment members disposed on the hood enter into abutment with the abutment members 17 and 18 disposed on the spacer 5. As a result of the described construction,, the hood can be slid off from the bottom portion 1, in the open state of the lock¬ ing device, and be slid into the position illustrated in Fig. 1. On the other hand, the hood cannot, naturally, be shifted in any other direction, because of the cooperation between the side edges 3 and 4, the side walls 12 and 13 and the two inwardly directed portions 15 and 16, the bottom portion 2 and the under edges 8 of the guide member, as well as further details 23-25 in the other end of the locking device. The design of the guide member will be described in greater detail with reference to Figs. 2-4. It will thus be apparent that the guide member has a bottom 19 from which the two end pieces 6 and 7* are upwardly bent approximately at right angles. Further, the guide member has two lower side walls 20 and 21, these being -also upwardly bent from the bottom 19. The side walls 20 and 21 are lo¬ cated in between the two end pieces 6 and 7, whereby these are sta¬ yed substantially in the longitudinal direction of the locking de¬ vice. It will be apparent from the above disclosure that the lower portidn of the guide member may be considered as a box which is placed on the upper face of the spacer 5. A through hole 22 is di¬ sposed centrally in the bottom 19 of the box, the hole also ex¬ tending through the spacer 5 and the base portion 1. The purpose of this hole 22 is to accommodate that screw, bolt or the like by means of which the locking device is anchored in a substrate. Suit¬ ably, this screw or bolt may be in the form of a so-called carriage bolt and have the nut placed interiorly in the guide member, so that the nut will hereby, in the locked and closed state of the locking device, be completely enclosed and protected from tampering. 4 As has been intimated above, the guide member is permanently fixed in the spacer 5, which, in its turn,*is permanently fixed in the base portion 1. This jointing can be effected by means of wel¬ ding, rivet connection, screw connection or the like. It should al- so be observed that that screw, bolt or the like which extends through the hole 22 improves the union of the above-mentioned de¬ tails. In order to prevent the locking device from being caused to rotate about the bolt which extends through the hole 22, there is provided at least one further hole through the base portion of the locking device, for anchorage of the locking device. This extra hole may be in the form of a countersunk hole and may be placed in one or both of the two elongate spaces 9 and 10. Alternatively, this extra hole may be disposed straight through the spacer 5, in other words in the central portion of the locking device. In the right hand end of the locking device of Figs. 2 and 3, there is disposed a U-shaped member with two shanks 23 and 24 ex¬ tending upwardly from the spacer 5, the shanks being interconnected by a web 25. This web or bottom piece 25 is also permanently fixed on the upper face of the spacer 5, which, as has been mentioned above, was permanently fixed in the base portion 1. The right-hand shank 24 has semi-rounded contour with the same configuration as the two end pieces 6 and 7 on the guide member. Further, this shank 24 has an opening 26, through which may be in- serted a key to a keyhole 27 in a locking cylinder 28 which is fix¬ edly screwed by means of a nut 29 into the other shank 23. The locking cylinder 28 has, in its left-hand end in Figs. 2 and 3, a protruding pin 30 which, under the action of a key in¬ serted in the keyhole 27, may be turned through 90°. On the pro- truding pin, there is disposed an approximately rectangular bolt bar 31 which may possibly be slidable in the longitudinal direction of the protruding pin. Under any circumstances, the bolt bar 31 is rotatably disposed in the same plane as the plane of the inner end piece 7 and is moreover arranged to be moved into abutment against the right-hand side of this end piece in Figs. 2 and 3. 5 Fig. 6 shows an insert portion which is fixedly lockable in the locking device proper and which serves for the fixed retention of, for example, a chain. It is apparent from Fig. 6 that the in¬ sert portion has a U-shaped bent portion 33, from which extend two legs 34 and 35 which are parallel with one another The outer width between the two legs 34 and 35 corresponds substantially with the inner width between the two side walls 12 and 13 of the hood 11, this width also approximately corresponding to the outer width of the two end pieces 6 and 7 of the guide member, as well as the shank 24. As a result, the insert portion 32 will be insertable in its longitudinal direction interiorly in the hood 11. In the region of transition between the two legs 34 and 35 and the bent portion 33 of the insert portion 32, there are provided shoulders 36 and 37 which, on insertion of the insert portion into the hood 11, may come into abutment against the end edge of the hood. The physipal extent of these two shoulders in the width di¬ rection of the insert portion corresponds approximately to the ma¬ terial thickness of the side walls 12 and 13 of the hood, which en- " • ta'ils that the outer width of the bent portion of the insert por- tion approximately corresponds to the outer width of the hood 11. It is apparent from Figs. 3 and 4 that both end pieces 6 and 7 of the guide member have registering recesses 38 and 39. These re¬ cesses are disposed in direct conjunction with the upper edges of the two side walls 20 and 21 on the guide member. Furthermore, the recesses 38 and 39 are dimensioned in such a manner that they can accommodate, substantially without play, the legs 34 and 35 of the insert portion 32, so that the insert portion may thereby be passed into the guide member to a position shown by broken lines in Fig. 2. If one imagines the hood 11 mounted on the locking device as it is shown in Fig. 2, the inside of the hood will abut against the outer sides of both legs 34 and 35, against the edges of the end pieces 6 and 7 and against the shank 24. This entails that the :.ags 34 and 35 of the shank will be securely enclosed and guided, first by the recesses 38 and 39 of the guide member, secondly by the up¬ per edges of the side walls 20 and 21 of the guide member, and thirdly by the inside of the hood 11. 6 It will be apparent from the above discussion also that the hood cannot be shifted in a direction to the right in Fig. 2, since, in such an instance, the shoulders disposed on the inwardly directed portions 15 and 16 of the hood will come into abutment against both of the shoulders 17 and 18 disposed on the spacer 5. Furthermore, the left-hand end edge of the hood in Fig. 2 will come into abutment against the shoulders 36 and 37 on the insert portion 32. This entails that if the insert portion 32 is held fixedly locked in the locking device, the insert portion will prevent left- ward shifting of the hood 11. Correspondingly, the hood 11 is pre¬ vented from rightward shifting by cooperation with the shoulders 17 and 18. It is apparent from Fig. 6 that the insert portion 32, at the ends of both legs 34 and 35, has recesses 40 and 41 which are placed in such a manner in the longitudinal direction of the legs that they are located on the right-hand side of the end piece 7 in Fig. 2 when the shoulders 36 and 37 abut against the end edge of * the hood 11, the hood 11 being, in its turn, arrested in. its right¬ ward movement towards the shoulders 17 and 18. If, in this pos- ition, the bolt bar 31 is turned through 90° from the position shown in Fig. 2, such that both ends of the bolt bar enter into en¬ gagement with the recesses 40 and 41, withdrawal to the left of the insert portion 32 will be prevented. In this situation, the insert portion 32 can withstand very powerful traction forces, since the bolt bar 31 supports against the outside of the end piece 7 and, moreover, both legs 34 and 35 of the insert portion 32 are very ac¬ curately shored and guided not only by the guide member but also by the hood 11. On mounting of the lock on a substrate, the insert portion 32 is first dismantled when the bolt bar 31 is set by means of the key in the position shown in Figs. 2 and 3. Removal of the insert por¬ tion 32 is, here, effected by being simply pulled out to the left. Thereafter, the hood 11 is shifted out of both of the elongate spaces 9 and 10, so that it is freely released from the rest of the locking device. In this position, the bottom portion 1 of the locking device can be screwed fast using a bolt which extends through the hole 22. After tightening of the nut placed 7 interiorly in the guide member - the nut thus being urged against the bottom 19 of the guide member - and after mounting of the ex¬ tra screws mentioned above, the locking device may be considered as fully mounted. Possibly, the nut placed interiorly in the guide member may be secured in relation to the bolt by means of centre- punching, a cotter pin or the like, or alternatively the nut may be of the self-locking type so that it will rotate with the bolt if the opposite end of the bolt were to be made accessible and ro¬ tated. Thus, once the locking device has been mounted on its sub¬ strate, the hood 11 is slid into place in a direction to the right in Figs. 2 and -3, until its movement is arrested by both of the shoulders 17 and 18. In this position, the locking device is ready for use and the insert portion 32 can, for example, be employed for fixedly locking a chain, which, in such an event extends with one link about the bent portion 33 of the insert portion. Fig. 7 shows a modified embodiment of the base portion 1. This embodiment may offer production-engineering advantages and possibly also superior strength qualities. It will be apparent from the Figure that the spacer 5 and the bottom face 2 are of one-piece manufacture, quite simply in that the bottom face has been given a corresponding longitudinal outward pressing. The two elongate spaces 9 and 10 and the and the upwardly directed side edges 3 and 4 of the bottom portion are also apparent from the Figure. In order further to reinforce the construction and avoid load¬ ings on the welding joint, rivet connection, screw connection or the like employed for fixed retention of the U-shaped portion with the shanks 23 and 24, the outer shank 24 may suitably be of one- piece manufacture with the base portion 1. In such an embodiment, the bottom piece 25 and the inner shank 23 will consist of a sep¬ arate detail which is fixed in the base portion. On the other hand, the outer shank is manufactured in that the base portion is pro¬ vided with a portion, projecting in the longitudinal direction of the locking device, this portion being bent up at right angles to the base portion. Also in this embodiment, it is important that both of the longitudinal spaces 9 and 10 extend throughout the 8 entire length of the locking device and hence also beyond the outer shank 24, which, to this end, suitably has recesses in conjunction with the upper face of the base portion. Correspondingly, the guide portion can be manufactured in two separate parts in which the outer end piece 6 is of one-piece manu¬ facture with the base portion 1. The construction will, here, be fully analogous with that disclosed above for the outer shank 24. The above-considered modifications may be particularly well- suited in such an embodiment in which the base portion and spacer have been produced as a single unit. Neither is it, according to the present invention, necessary that>the two shoulders 17 and 18 which, in the above-described em¬ bodiment, are placed on the spacer 5 for cooperation with cor¬ responding shoulders on both of the inwardly directed portions 15 and 16 of the hood 11, need be placed and designed in this manner. In particular in one such embodiment in which the spacer 5 is of one-piece manufacture with the bottom portion, it may be more ap- , propriate to design these shoulders or arrest means, which prevent shifting of the hood in one direction relative to the base portion, in a manner different from that described. Thus, for example, counterparts to the two shoulders 17 and 18 may be realised by pro¬ viding flap-shaped recesses in the base portion 1, the material forming the flaps being impressed, so that they extend into the two longitudinal spaces 9 and 10. Naturally, a corresponding placing of the arrest means of the hood 11 must then be arranged. Counterparts to the two shoulders 17 and 18 can also be placed on the guide member or on the U-shaped portion with the shanks 23 and 24. Furthermore, analogous abutments or arrests may also be placed on both side edges 3 and 4, for example in that these have upper por- " tions inwardly bent towards one another and being parallel with the bottom face 2 of the base portion and being accommodatable in cor¬ responding recesses in both side walls 12 and 13 of the hood 11. The invention may be modified further without departing from the spirit and scope of the appended claims.

Claims: CLAIMS 1. Locking device for fixedly locking, for example, a chain in a substrate and comprising an insert portion (32) for engagement with the chain, the insert portion being insertable in and, by means of a locking mechanism (28), fixedly lockable in a major por- tion (1, 11) of the locking device, characterised in that the major portion comprises a base portion (1) which, by anchorage means ex¬ tending through an opening (22), is anchorable to the substrate, and a hood (11) which is disposed outwardly to enclose the locking device and which is fixedly lockable by means of the locking mech- anism (28) in relation to the base portion together with the insert portion. 2. Locking device according to claim 1, characterised in that the hood (11) and the base portion (1) have mutually position- ally-fixing engagement portions (15, 16; 2-4; 17, 18, respectively)> • and that the hood and the insert portion (32) dis¬ play surfaces (12, 13; 36, 37, respectively) cooperating with one another in the locked state of the locking device for locking the hood in the base portion by the intermediary of the insert portion. 3. Locking device according to claim 1 or 2, characterised in that the insert portion (32), in its position accommodated in the locking device, is in positionally-fixing cooperation with a guide member (6, 7, 19-21) and with the inside of the hood (11), and that the guide member has a locking surface (7) against which a locking portion (31) may be brought into abutment and is, under the action of the locking mechanism (28), movable between a position engaging in recesses (40, 41) in the insert portion, and an inactive position where the insert portion may be withdrawn from the locking device. 4. Locking device according to claim 3, characterised in that the opening (22) is disposed through a portion (19) of one piece manufacture with the locking surface (7) of the guide mem¬ ber (6, 7, 19-21). IQ 5. Locking device according to any one of claims 2 - 4, characterised in that the base portion (1) is in the form of a shallow U-shaped profile body with a bottom portion (2) and two parallel side portions (3, 4), that the hood (11) is in the form of an approximately channel-shaped body with two side walls (12, 13), that the hood is, in its longitudinal direction, insertable with the side walls between the side portions, first engagement portions (15, 16) on the hood being in the form of portions bent inwardly from the side walls and being accommodatable in cor- responding grooves (9, 10) in the base portion in conjunction with the side portions, and that shifting of the hood in one direction is restricted by means of second engagement portions (17, 18) which are in the form of mutually abuttable locking surfaces on the base portion and the hood.

Inventors: HAGEBERG THORLEIF, HAGEBERG, THORLEIF
Applicants: SIGARTH IND AB, INDUSTRI AB SIGARTH
Application year: 1985
Main classification: E05B73
IPC codes: E05B9, E05B73