JP4941209B2 - Locking device - Google Patents

Description

  The present invention relates to a locking device that locks an article conveyed by a conveying device.

  In a transport device that transports a load, for example, a car cart composed of a cage-shaped container in which a plurality of pipes are assembled in a grid and wheels attached to the lower part of the cage-shaped container may be placed on a fork and carried. However, since the car trolley is placed in a state in which the car trolley is freely movable and travels in that state, the car trolley is transported in an unstable state. A transport device has been proposed that transports a load in a state in which the load is fixed by a load fixing and releasing means (see, for example, Patent Document 1).

In the transport apparatus described in Patent Document 1, the baggage fixing / releasing means operates an opening / closing claw mechanism by operating an opening / closing claw mechanism having a pair of claw portions and a handle turning lever as an operation portion to perform an opening / closing operation. Claw opening / closing drive means to be performed. In the luggage fixing and releasing means described in Patent Document 1, when the handle turning lever is turned, the claw opening / closing driving means is operated, and the pair of claw levers constituting the opening / closing claw mechanism is turned. The claw portion of the claw lever shifts between a state in which the bar-shaped portion of the luggage is clamped and a state in which it is released.
Utility Model Registration No. 3093419

  However, in the transport device described in Patent Document 1, when holding the bar-shaped portion of the load, the bar-shaped portion is brought into contact with a pair of opened holding portions (claw portions), and the handle is rotated in that state. The rod-shaped portion of the luggage is clamped by operating the moving lever and rotating the claw lever in the direction in which the clamping part is closed. On the other hand, in order to release the lock of the baggage by the baggage fixing and releasing means, the gripping portion is opened by operating the handle turning lever and turning the claw lever in the direction in which the pinching portion is opened. Therefore, in the luggage fixing / releasing means described in Patent Document 1, it is necessary to rotate the pair of claw levers when locking the luggage and when releasing the luggage lock. Has to be performed twice, and there is a problem that the number of operations of the handle turning lever increases and is troublesome.

  The present invention has been made paying attention to such problems, and an object of the present invention is to enable a pair of holding portions to be shifted from an unlocked state to a locked state while the lock lever is kept in the locked position. Thus, an object of the present invention is to provide a locking device that can lock an article conveyed by the conveying device without operating a lock lever.

In order to achieve the above-mentioned object, the invention according to claim 1 is supported by a base portion installed in the transfer device so as to be rotatable, and clamps the rod-shaped portion of the article when in a locked posture. 1 support member and 2nd support member, the lock position which can hold | maintain the said 1st support member and the said 2nd support member with the said lock attitude | position, and clamping of the said rod-shaped part by the said 1st support member and the said 2nd support member And a lock lever that is operated to an unlock position for switching to a state in which release is possible. The first support member is always arranged in the lock posture, and the second support member is pressed by the bar-shaped portion of the article. it midway rotation to the lock position from the receiving position to allow for, in the lock device of the first support member in contact with the first support member is rotated to move to the lock position, before Symbol The locking device further includes an engaging portion provided on the first support member and engageable with the second support member, holding means for holding the lock lever in the locked position, and the base portion. The link link member, which is rotatably supported, and the lock lever and the link link member are connected, and the link link member is interlocked in synchronism when the lock lever is operated to the unlock position. The link member for operation, the link member that connects the link member and the first support member, the link member that interlocks the first support member when the link member rotates, and the second support member When moving from the receiving posture to the locked posture, the interlock avoiding portion that brings the link member and the link member for operation into a non-interlocking state and the first support member are in the locked posture. And a biasing means for biasing the, in the state in which the second support member rotates the lock position from the receiving position, the locking lever, the actuating link and the link member by the interlocking avoidance portion Since the second support member is allowed to rotate while being held in the locked position because the member is not interlocked, the second support member is rotated from the receiving position to the locked position. The engaging portion engages with the second support member, and the lock lever is positioned at the lock position, so that the second support member is held in the lock posture. And

In this invention, in order to pinch the bar-shaped part of the article when the transport apparatus transports, the bar-shaped part of the article is pressed against the second support member in the receiving posture to rotate the second support member. The second support member changes from the receiving position to the lock position by pivoting, the first support member and the second support member for sandwiching a rod-like portion of the article cooperate. When the second support member rotates, the first support member rotates by being pushed by the second support member, so that the link member moves in conjunction with the rotation of the first support member. Since the member and the link member for operation are in a non-interlocking state, the link member for operation does not interlock with the movement of the link member. Therefore, the second support member can be changed from the receiving posture to the locked posture while the lock lever is in the locked position. When the second support member changes to the locked posture, the engaging portion and the second support member engage with each other while the rod-shaped portion of the article is sandwiched between the first support member portion and the second support member, and the second support member is engaged. The rotation of the member is restricted. Therefore, the lock on the bar-shaped portion of the article by the first support member and the second support member is not released until the lock lever is operated and moved to the lock release position.

  Further, when releasing the locked state of the article, the operation link member is operated by operating the lock lever from the lock position to the lock release position, and the connection link member is rotated via the operation link member. And a 1st support member is interlocked with rotation of a connection link member via a link member, and engagement with an engaging part and a 2nd support member is cancelled | released when a 1st support member rotates. Thereafter, when the bar-shaped portion of the article is moved in a direction away from the first support member and the second support member, the sandwiched state of the article is released and the second support member returns to the receiving posture.

  The invention according to claim 2 is the invention according to claim 1, wherein two sets of the first support member and the second support member are disposed so as to sandwich the connection link member therebetween, and one connection link is provided. It is provided that two link members that respectively connect the two first support members to the member are provided, and the two link members are positioned symmetrically with respect to the rotation center of the connection link member. To do.

In this invention, since one article can be clamped at two locations by the two sets of the first support member and the second support member, the article can be securely locked.
Further, if the lock lever is operated to move from the lock position to the lock release position, the two second link members move in conjunction with the rotation of one connection link member, and each set of first support members. And engagement of a pair of engaging part provided in the 2nd support member can be cancelled | released. Therefore, since the engagement of the pair of engaging portions in the two sets of the first support member and the second support member can be simultaneously released by operating the lock lever once, the lock on the article can be easily released. .

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the urging means has a first end attached to the base portion and a second end supported by the first support. The gist is that it is composed of a spring member attached to the member.

  In this invention, since the spring member can directly apply a biasing force to the first support member, the first support member is held in a locked posture as compared with the case where the biasing force is indirectly applied to the first support member. Therefore, it is possible to accurately apply the urging force necessary for the purpose.

  According to the present invention, the pair of holding portions can be shifted from the unlocked state to the locked state while the lock lever is in the locked position, so that the article conveyed by the conveying device without the operation of the lock lever. Can be locked.

  Hereinafter, an embodiment in which the present invention is embodied in a lock device mounted on a low lift truck as a transport device will be described with reference to FIGS. In the present embodiment, the forward direction of the low lift truck is described as the front, and the front, rear, upper, lower, left, and right are defined based on the forward direction. In the case of the locking device, the front, rear, upper, lower, left, and right are defined corresponding to each direction of the low lift truck based on the state of being attached to the low lift truck.

  As shown in FIG. 1A, the low lift truck 11 is provided with a deck 13 on which a driver stands on the rear side of the vehicle body 12, and a battery storage portion 14 and a battery storage device on the front side of the vehicle body 12. A fork 15 extending forward from the lower portion of the portion 14 is supported so as to be movable up and down. A plurality of rear wheels 16 are provided at the lower portion of the vehicle body 12, and a plurality of front wheels (not shown) are provided at the lower portion on the tip side of the fork 15.

  The fork 15 is configured to be insertable below the base portion 19 of the car cart 18 as an article, and is configured to be placed by being lifted while being inserted below the base portion 19. The car carriage 18 is composed of a cage-shaped container 21 configured by assembling a plurality of pipes 20 as rod-shaped portions in a lattice shape, and a wheel 17 attached to the lower part of the cage-shaped container 21. The base portion 19 constitutes the bottom portion of the cage-shaped container 21. And the car trolley | bogie 18 is comprised so that it may accommodate so that a load may be enclosed with the cage | basket | car shape container 21, and it may move, if it is pushed by the operator.

  The vehicle body 12 is provided with an operation control device 23 for operating forward and backward movement of the low lift truck 11 and transfer by the fork 15 at the upper part thereof. As shown in FIG. 1B, a pair of brackets 24 are provided at the lower left and right sides of the battery storage portion 14, and a support frame formed in an inverted U shape by bending a pipe-like member at two locations. Both end portions of 25 are attached to the battery storage portion 14 via a pair of brackets 24.

  A lock device 27 that locks the car carriage 18 is fixed to the support frame 25 on a pipe base portion 26 that extends in the left-right direction of the low lift truck 11 and exists between two bent portions.

  As shown in FIG. 2, the locking device 27 includes a plate-like first base portion 29 that is directly fixed to the pipe pedestal portion 26 by a plurality of bolts 28. The center portion of the first base portion 29 projects to the fork 15 side (front side), and the bracket 24 is formed in a cross-sectional channel shape with respect to the portion projecting to the fork 15 side (front side) (see FIG. 4). ) Is joined. A plate-like second base portion 31 is fixed on the bracket 24 by a plurality of bolts 30.

  The second base portion 31 is plate-shaped with respect to the central portion in the left-right direction (width direction), and the first end portion 32a on the deck 13 side (rear side) is curved to form a hook shape in plan view. The connected link member 32 is rotatably supported by a bolt 33. Here, the connection link member 32 is provided with a bearing hole (not shown) through which the shaft portion of the bolt 33 can be inserted, and the connection link member 32 is rotatably supported by inserting the shaft portion of the bolt 33 into the bearing hole. Has been. The shaft portion of the bolt 33 is screwed into a screw hole (not shown) provided in the second base portion 31. In addition, the bolt described below shall support the object member with the same structure so that rotation is possible unless it mentions especially.

  A pair of first support plates 34A and 34B as first support members and second support plates 35A and 35B as second support members are provided on both left and right sides of the second base portion 31 with the connecting link member 32 interposed therebetween. Each is attached to the second base portion 31. The first support plate 34A and the second support plate 35A are rotatably supported by bolts 36A and 37A and are provided adjacent to each other. Similarly, the first support plate 34B and the second support plate 35B are rotatably supported by bolts 36B and 37B and are provided adjacent to each other. The first support plate 34A and the second support plate 35A in one set and the first support plate 34B and the second support plate 35B in the other set are separated from each other by an interval between the pipes 20 provided on the car carriage 18 and extending vertically. They are separated by the same distance.

  The first support plate 34A is provided with a first recess 38A on the front end side (fork 15 side) along the peripheral surface of the pipe 20 in the car carriage 18. The first support plate 34A is in a locked posture with the first recess 38A facing the second support plate 35A. The first support plate 34A is provided with a step portion 39A as an engaging portion at the end of the first recess 38A, and on the base end side (deck 13 side), the first locking plate 40A is located near the second support plate 35A. Is erected. Note that the step portion 39A has a step surface 76A that extends away from the second support plate 35A as it goes from the distal end side to the proximal end side of the first support plate 34A.

  Then, at a position separated from the first locking plate 40A toward the second support plate 35A, the base end portion is fastened to the second base portion 31 by the bolt 41A and the distal end portion is directed to the first locking plate 40A side. A bent second locking plate 42A is provided. A first end 44A of a support plate spring member 43A as an urging means is attached to the first locking plate 40A, and a second end 45A of the support plate spring member 43A is attached to the second locking plate 42A. Is attached. The support plate spring member 43A is a tension spring that urges the first support plate 34A in the counterclockwise direction in FIG. 2 to maintain the lock posture.

  The second support plate 35A adjacent to the first support plate 34A is provided with a second recess 47A made of a curved surface having a length equal to half of the entire circumference of the pipe 20 on the tip side (fork 15 side). As shown in FIG. 3A, the second support plate 35A is a distance T1 between the rotation center P1 existing at the center of the bolt 37A and the tip 48A on the first support plate 34A side of the second recess 47A. Is configured to be longer than the shortest distance T2 from the rotation center P1 to the step portion 39A of the first support plate 34A. Further, the second support plate 35A is in a receiving posture, and the distance T1 from the rotation center P1 to the tip 48A on the first support plate 34A side of the second support plate 35A is the first support from the rotation center P1. The plate 34A is configured to be shorter than the longest distance T3 to the stepped portion 39A. The second support plate 35A is configured to rotate on a plane parallel to the rotation surface of the connecting link member 32, and the second recess 47A of the second support plate 35A faces the first support plate 34A side. When the posture is changed to the locked posture, the second support plate 35A has the tip portion 48A on the first support plate 34A side engaged with the stepped portion 39A. Then, the second support plate 35A is restricted from rotating in the direction in which the second recess 47A faces the front side.

  Here, in the vicinity of the base end side of the second support plate 35A, a receiving posture stopper 49A formed in a square plate shape is erected at a position between the second support plate 35A and the second locking plate 42A. Has been. The receiving posture stopper 49 </ b> A is provided by joining the base end portion thereof to the second base portion 31. Further, the receiving posture stopper 49A restricts the second support plate 35A in the receiving posture from rotating further outward (clockwise in FIG. 2). That is, the second support plate 35A is held in the receiving posture by contacting the receiving posture stopper 49A. In the state where the second support plate 35A is held in the receiving posture, the tip 48A is located slightly closer to the first support plate 34A and the second recess 47A is opened obliquely forward, and the pipe of the car carriage 18 20 can be pressed against the second recess 47A. Here, as shown in FIG. 3A, between the side on the left side of the contact portion 59A of the second support plate 35A that contacts the stopper 49A for receiving posture and the rotation center P1 of the second support plate 35A. The distance is formed to be shorter than the distance T4 between the contact portion 59A of the second support plate 35A and the rotation center P1 of the second support plate 35A.

  As shown in FIG. 2, the first support plate 34A, the second support plate 35A, the spring member 58, the receiving posture stopper 49A, and the second locking plate 42A are arranged with the connecting link member 32 interposed therebetween. The other first support plate 34B, the second support plate 35B, the support plate spring member 43B as an urging means, the receiving posture stopper 49B, and the second locking plate 42B, which are arranged symmetrically, are the members described above. It has the same configuration.

  On the other hand, the first base portion 29 provided at a position one step lower than the second base portion 31 has a plate-like shape in a posture that stands on the right side and with respect to the side on the deck 13 side (rear side). A lock lever bracket 50 is joined. In the lock lever bracket 50, a connecting portion 51 is extended toward the deck 13 side (rear side) at a substantially central portion in the longitudinal direction. As shown in FIG. 4, a dog-shaped lock lever 52 is attached to the connecting portion 51 in a state of being rotatably supported by a bolt 53.

  The lock lever 52 extends from the connecting plate 54 directly attached to the tip of the connecting portion 51, and the first end 54a of the connecting plate 54, and bends toward the deck 13 side (rear side) along the way. 55. The operating rod 55 is provided with a grip at the tip.

  The connecting plate 54 is provided with a locking portion 57 extending toward the deck 13 (rear side). An endless locking groove capable of locking the first end 58 a of the spring member 58 is formed on the front end side of the locking portion 57.

  On the other hand, the locking lever bracket 50 is provided with a locking plate 60 that extends toward the deck 13 (rear side) at a position spaced to the left from the locking portion 57 and that bends the tip end upward. ing. The locking plate 60 is formed with a locking groove at its distal end that can lock the second end 58 b of the spring member 58.

  Then, the first end 58 a of the spring member 58 is locked in the locking groove of the locking portion 57 and the second end 58 b of the spring member 58 is locked in the locking groove of the locking plate 60. The spring member 58 is stretched between the locking portion 57 and the locking plate 60. The spring member 58 is a tension spring and biases the locking portion 57 toward the locking plate 60. Therefore, when no external force is applied to the lock lever 52, the connecting plate 54 is in contact with a rectangular parallelepiped lock position stopper 62 protruding from the lock lever bracket 50 to the deck 13 side (rear side). The lock position stopper 62 is fastened to the lock lever bracket 50 by a bolt 64. The holding means for holding the lock lever in the lock position includes a lock position stopper 62, a locking portion 57, a locking plate 60, and a spring member 58.

  A rectangular parallelepiped lock release position stopper 63 that protrudes from the lock lever bracket 50 to the deck 13 side (rear side) is provided below the lock position stopper 62 with the lock lever 52 interposed therebetween. The lock release position stopper 63 is fastened to the lock lever bracket 50 by a bolt 64 and abuts against the lock lever 52 operated downward against the spring member 58 so that the lock lever 52 moves downward from the lock release position. It functions to regulate what you do.

  As shown in FIG. 2, the second end portion 54b of the connecting plate 54 (the base end portion of the lock lever 52) and the first end portion 32a of the connecting link member 32 are first and second at both ends, respectively. The joint portions 65 and 66 are connected via a substantially rod-shaped actuating link member 67 provided.

  The first joint portion 65 is fitted with a shaft portion of a bolt (not shown) penetrating the second end portion 54 b of the connecting plate 54 in a state where there is play in a receiving hole (not shown) of the first joint portion 65, so The end 54b is connected. Therefore, the first joint portion 65 allows the connecting plate 54 to rotate in the vertical direction and restricts the operation link member 67 from rotating in the front-rear direction with the first joint portion 65 as a fulcrum.

  The 2nd joint part 66 is connected with the 1st end part 32a of the connection link member 32 via the volt | bolt 71 (refer FIG. 4) penetrated by the long hole 70 as an interlocking avoidance part. The second joint portion 66 allows the connecting link member 32 to rotate in the front-rear direction and restricts the actuation link member 67 from rotating in the vertical direction with the second joint portion 66 as a fulcrum.

  As shown in FIG. 3B, the long hole 70 is formed in the first end portion 32a of the connection link member 32, and the rotation center P2 of the connection link member 32 existing at the center of the bolt 33 and the first end 32a. The center line extends on a virtual circle having a radius of a line S2 connecting the two joint portions 66. The length R of the long hole 70 indicates that the second joint portion 66 moves relative to the long hole 70 when the first support plate 34A and the second support plate 35A change from the receiving position to the locked position. It is set to an allowable length.

  As shown in FIG. 2, the second end portion 32b of the connecting link member 32 and the base end side of the first support plate 34A are substantially rod-shaped, and the first joint portion 73A and the second joint are formed at both ends. It is connected via a first link member 75A provided with a portion 74A.

  The first joint portion 73A of the first link member 75A is connected to the second end portion 32b of the connection link member 32 via a bolt (not shown) that penetrates the second end portion 32b of the connection link member 32. The first joint portion 73A allows the connection link member 32 to rotate in the front-rear direction.

  The second joint portion 74A of the first link member 75A is connected to the base end side of the first support plate 34A via a bolt (not shown) penetrating the base end side of the first support plate 34A. The second joint portion 74A allows the connection link member 32 to rotate in the front-rear direction.

  The first support plate 34B disposed symmetrically with respect to the first support plate 34A (left side in FIG. 2) with the connecting link member 32 interposed therebetween is a second member having the same shape as the first link member 75A. It is connected via a link member 75B. In the second link member 75B, the first joint portion 73B is connected to the connection link member 32, and the second joint portion 74B is connected to the proximal end side of the first support plate 34B. As shown in FIG. 3B, the distance S1 between the first joint portion 73A of the first link member 75A and the rotation center P2 of the connecting link member 32 is the first joint of the second link member 75B. It is equal to the distance S3 between the portion 73B and the rotation center P2 existing at the center of the bolt 33.

Next, the operation of the lock device 27 configured as described above will be described.
When the car truck 18 is transported by the low lift truck 11, the car truck 18 is placed on the fork 15 and then locked so that the car truck 18 does not lose its balance or move unexpectedly during the transport. The device 27 restricts and locks the movement of the car cart 18. When the car cart 18 is locked by the locking device 27, first, the car cart 18 has a separation with the lock lever 52 positioned at the lock position and allowing the second support plates 35A and 35B to rotate. The pipes 20 are simultaneously pressed against the second recesses 47A and 47B of the second support plates 35A and 35B so that the line connecting the two pipes 20 is parallel to the left-right direction. And 2nd support plate 35A, 35B rotates so that 2nd recessed part 47A, 47B of 2nd support plate 35A, 35B may face the 1st support plate 34A, 34B side. Then, as shown in FIG. 5, the tip portions 48A, 48B of the second support plates 35A, 35B abut against the step portions 39A, 39B of the first support plates 34A, 34B to push the first support plates 34A, 34B. Thus, a force that overcomes the urging force of the support plate spring members 43A and 43B is applied to the first support plates 34A and 34B. Then, the first support plates 34A and 34B are rotated so as to be inclined toward the second support plates 35A and 35B, so that the shortest distance from the rotation center P1 of the second support plates 35A and 35B to the step portion 39A is long. Thus, the tip portions 48A, 48B of the second support plates 35A, 35B get over the tops of the step portions 39A, 39B. When the tip portions 48A, 48B of the second support plates 35A, 35B get over the tops of the step portions 39A, 39B, the first support plates are biased by the biasing force of the support plate spring members 43A, 43B against the first support plates 34A, 34B. 34A and 34B rotate to return to the locked posture, and the second support plates 35A and 35B also have the locked posture.

  Here, when the second support plates 35 </ b> A and 35 </ b> B change from the receiving posture to the locked posture, the connecting link member 32 rotates via the first link members 75 </ b> A and 75 </ b> B, but the second joint of the operating link member 67. The portion 66 is only displaced relative to the long hole 70, and the second joint portion 66 does not substantially move. That is, even if the connection link member 32 rotates, the operation link member 67 does not move in conjunction with each other, and the operation link member 67 and the connection link member 32 are in an unlinked state. Accordingly, the second support plates 35A and 35B change from the receiving posture to the locked posture without operating the lock lever 52, and as shown in FIG. 6, two sets of the first concave portions 38A and 38B and the second concave portions 47A and 47B. Thus, the two pipes 20 of the car cart 18 are sandwiched.

  In the state where the first support plate 34A and the second support plate 35A are changed to the locked posture, the first recess 38A and the second recess 47A face each other, and the step 39A provided on the first support plate 34A includes The second support plate 35A engages with the tip 48A on the first support plate 34A side, and the rotation of the second support plate 35A is restricted. Therefore, when the low lift truck 11 moves backward with the car cart 18 placed thereon, the movement of the car cart 18 is restricted. That is, since the rotation of the second support plate 35A is regulated by the step portion 39A, the second support plates 35A and 35B are not rotated and changed to the receiving posture. Therefore, the car carriage 18 can be locked by the first support plates 34A and 34B and the second support plates 35A and 35B without any trouble even when the low lift truck 11 performs the transport operation.

  Further, when unlocking the car carriage 18, first, the lock lever 52 is rotated toward the lock release position (in the direction of the arrow shown in FIG. 4) to move the lock lever 52 from the lock position to the lock release position. The operating link member 67 is moved to the right side. Then, as shown in FIG. 7, the connection link member 32 rotates in conjunction with the movement of the operation link member 67, and the first and second link members 75 </ b> A, 75 </ b> B interlock with the rotation of the connection link member 32. Move symmetrically with respect to the rotation center P2 on the same plane. When the first and second link members 75A and 75B move, the two first support plates 34A and 34B are inclined from the locked state (the state shown in FIG. 6) to the second support plates 35A and 35B. Rotate. Then, the shortest distance from the rotation center P1 of the second support plates 35A and 35B to the step portions 39A and 39B becomes longer, and the tip portions 48A and 48B of the second support plate 35A get over the top portions of the step portions 39A and 39B. By moving to the front end side of the first support plates 34A and 34B, the engagement between the step portions 39A and 39B and the front end portions 48A and 48B of the second support plates 35A and 35B is released. After that, when the car carriage 18 locked by the two sets of the first support plates 34A and 34B and the second support plates 35A and 35B is pulled out from the lock device 27, the pipe 20 has the first recesses 38A and 38B and the second recesses 47A. 47B, the holding state of the pipe 20 is released, and the second support plates 35A, 35B return to the receiving posture.

In this embodiment, the following effects can be obtained.
(1) The locking device 27 includes a first support plate 34A provided with a first recess 38A on the distal end side, and a second support plate 35A provided with a second recess 47A on the distal end side, and the first support plate 34A. The second support plate 35A is connected to the connecting link member 32 via the first link member 75A. The connection link member 32 is connected to the lock lever 52 via the operation link member 67, and the connection link member 32 is a length serving as an interlock avoidance unit that brings the operation link member 67 and the link member into an unlinked state. A hole 70 is provided. Therefore, regardless of the operation of the lock lever 52, the second support plate 35A is locked from the receiving position by pressing the pipe 20 of the car carriage 18 against the second recess 47A while the lock lever 52 is positioned at the lock position. Can change to posture. And the pipe 20 of the car trolley | bogie 18 can be clamped by the 1st recessed part 38A and the 2nd recessed part 47A by making the 1st support plate 34A and the 2nd support plate 35A into a lock attitude | position. Therefore, it is not necessary to operate the lock lever 52 when locking the car cart 18, and the work of locking the car cart 18 can be simplified accordingly.

  (2) The first support plate 34A is provided with a step portion 39A as an engaging portion at the end of the first recess 38A. When the first support plate 34A and the second support plate 35A are in the locked posture, the lock lever 52 is positioned at the lock position, and the step portion 39A and the tip end portion 48A of the second support plate 35A are engaged. Match. Therefore, the first support plate 34A and the second support plate 35A can be held in a locked posture in which the pipe 20 of the car carriage 18 is sandwiched by the first recess 38A and the second recess 47A.

  (3) The lock lever 52 is attached in a state where it is rotatably supported by the bolt 53. The lock lever 52 and the connecting link member 32 are connected via an operating link member 67. Then, by rotating the lock lever 52 from the lock position to the lock release position, the engagement between the stepped portions 39A and 39B and the end portions 48A and 48B of the second support plates 35A and 35B can be released. When the car carriage 18 is pulled out, the pipe 20 can be detached from the first recesses 38A and 38B and the second recesses 47A and 47B.

  (4) Two sets of first support plates 34 </ b> A and 34 </ b> B and second support plates 35 </ b> A and 35 </ b> B are disposed on both the left and right sides of the second base portion 31 with the connecting link member 32 interposed therebetween. Accordingly, the two pipes 20 of the car carriage 18 can be sandwiched and locked by the two sets of the first support plates 34A and 35B and the second support plates 35A and 35B, respectively. Therefore, the car cart 18 can be reliably locked by the lock device 27 as compared with the case where only one pipe 20 is sandwiched.

  (5) The two sets of first and second support plates 35A and 35B are connected to the connecting link member 32 by the first and second link members 75A and 75B, respectively, and the first and second link members 75A and 75B. Are interlocked with the rotation of the connecting link member 32 and arranged symmetrically with the rotation center P2 in between. Then, the operating link member 67 is moved by operating the lock lever 52 to move to the unlocking position, and the first and second link members 75A and 75B are simultaneously moved via the connecting link member 32. Therefore, in the two sets of the first support plates 34A and 34B and the second support plates 35A and 35B, the engagement between the step portions 39A and 39B and the tip portions 48A and 48B of the second support plates 35A and 35B can be simultaneously released. The car cart 18 can be easily unlocked.

  (6) The support plate spring members 43A and 43B are attached to the first locking plates 40A and 40B whose first end portions 44A and 44B are erected from the upper surfaces of the first support plates 34A and 34B, respectively. Two end portions 45A and 45B are attached to second locking plates 42A and 42B provided on the second base portion 31, respectively. Accordingly, since the support plate spring members 43A and 43B can directly apply a biasing force to the first support plates 34A and 34B, compared to a case where the biasing force is indirectly applied to the first support plates 34A and 34B. Thus, it is possible to accurately apply the urging force necessary to hold the first support plates 34A and 34B in the locked posture.

  (7) The receiving posture stoppers 49A and 49B are provided at positions where they come into contact with the second support plates 35A and 35B changed to the receiving posture. Therefore, when the car cart 18 is not locked, the second support plate 35A can be held in a receiving posture in which the pipe 20 of the car cart 18 can be pressed against the second recess 47A. Therefore, when the car carriage 18 is to be locked, it is possible to avoid a problem that the pipe 20 cannot be pressed against the second recess 47A because the second support plate 35A is not in the receiving posture. it can.

The embodiment is not limited to the above, and may be embodied as follows, for example.
○ Instead of directly urging the first support plates 34A, 34B by the support plate spring members 43A, 43B as the urging means, an urging means for urging via the connecting link member is provided, and the urging means The first support plate may be biased so as to be in a locked posture. For example, in FIG. 2, a spring member is disposed on the right side of the connecting link member 32, the first end of the spring member is attached to the second end of the connecting link member 32, and the second end is connected to the second base portion. If the second end portion of the connecting link member 32 is biased so as to be inclined toward the first supporting plate by being attached to the standing locking plate, the first supporting plate is connected to the connecting link member 32 and the first link. It is biased so as to be indirectly received through the member 75A.

  ○ Instead of arranging two sets of the first support plates 34A and 34B and the second support plates 35A and 35B so that the connecting link member 32 is sandwiched therebetween, only one set of the first support plate and the second support plate is provided. Good. Moreover, while providing only one set of a 1st support plate and a 2nd support plate, the position spaced apart from the 1st support plate and the 2nd support plate in the left-right direction by the space | interval between the pipes 20 in the lower part of the 2nd base part 31. Alternatively, a block-shaped support made of resin may be provided. And the recessed part which has a concave surface along the surrounding surface of the pipe 20 is formed in a support body, and it is made to clamp by pushing a pipe part into the recessed part. If comprised in this way, since two pipe parts can be pinched | interposed by a 1st support plate, a 2nd support plate, and a support body, since the car trolley 18 is locked in one place, the car trolley 18 rotates. Can be suppressed.

  ○ Since the interlock avoiding portion only needs to be able to bring the link member and the link member for operation into the non-interlocking state when the first support plates 34A and 34B and the second support plates 35A and 35B change from the receiving posture to the locked posture, In addition, an interlock avoidance unit that avoids the connection link member from rotating in conjunction with the movement of the second link members 75A and 75B may be provided. For example, the rotation center P2 of the connecting link member 32 and the first joint portions 73A, 73B are connected to the connecting link member portion where the first joint portions 73A, 73B of the first link member 75A and the second link member 75B are connected. A long hole having a center line located on a virtual circle having a radius connecting a line connecting the two is formed. Then, the first and second link members are inserted when the second support plates 35A and 35B are changed from the receiving posture to the locked posture by inserting the bolt into the elongated hole and then connecting to the first joint portions 73A and 73B. Even if 75A and 75B move, the connecting link member 32 does not rotate, so that the operating link member is prevented from interlocking.

  ○ Instead of providing a long hole as the interlock avoidance portion, the interlock avoidance portion may be configured by a long groove. For example, a long groove having a center line located on a virtual circle having a radius connecting a rotation center P2 of the connecting link member and the first joint portions 73A and 73B is formed, and the first end of the connecting shaft member is formed in the long groove. If the second end portion of the connecting shaft member is inserted into the second joint portion of the operating link member and connected, the long groove is in an unlinked state between the first and second link members and the operating link member. It functions as an interlock avoidance unit.

  (Circle) You may change the shape of the 1st recessed part formed in the front end side of 1st support plate 34A, 34B. For example, a first recess having a shape that follows the outer shape of the square pipe portion and can be engaged with the corner portion of the square pipe may be formed so as to sandwich the square pipe portion having a rectangular cross section. Moreover, you may make the 1st recessed part the shape which can respond to both a round pipe and a square pipe. In this case, for example, the shape of the first recess may be a shape having a part of the outer shape of the square pipe and a part of the outer shape of the round pipe.

  (Circle) You may change the shape of the 2nd recessed part formed in the front end side of 2nd support plate 35A, 35B. For example, a second recess having a shape that follows the outer shape of the square pipe portion and can be engaged with the corner portion of the square pipe may be formed so that the square pipe having a rectangular cross section can be sandwiched. Moreover, you may make the 2nd recessed part the shape which can respond to both a round pipe and a square pipe. In this case, for example, the shape of the second recess may be a shape having a part of the outer shape of the square pipe and a part of the outer shape of the round pipe.

  A first auxiliary support plate may be provided on the top surface on the front end side of the first support plate, and a second auxiliary support plate may be provided on the top surface on the front end side of the second support plate. And while providing the 1st recessed part which followed the outline of the rod-shaped part of the articles | goods currently set as clamping object accurately in a 1st auxiliary | assistant support plate, it followed the outline of the rod-shaped part of articles | goods set as clamping object accurately. The second recess is provided in the second auxiliary support plate. If comprised in this way, the locking device which can pinch | interpose the rod-shaped part of articles | goods reliably can be manufactured, without raising cost significantly.

  The stoppers 49A and 49B for receiving postures may be omitted. In this case, when performing the locking operation with respect to the car carriage 18, the operator holds the second support plates 35 </ b> A and 35 </ b> B in the receiving posture and presses the pipe 20 of the car carriage 18 against the second recesses 47 </ b> A and 47 </ b> B in this state. Then, the second support plates 35A and 35B can be rotated to change to the locked posture.

  In the case where the transport device transports two car carts of a half size to the car cart 18 in the embodiment, the two car carts may be locked by one locking device. In this case, a pair of the first support plate 34A and the second support plate 35A sandwiches the pipe portion of one car cart, and the pair of the first support plate 34B and the second support plate 35B sandwiches the pipe of the other car cart. The part may be clamped. In this case, a block-shaped support body made of resin is provided at the lower part of the second base part 31, two recesses that can be engaged with the pipe 20 are formed in the support body, and the pipe parts are respectively pushed into the recesses to be sandwiched. If it makes it, it can suppress that two car trolley | bogies rotate.

  ○ What the locking device locks is not limited to the car car pipe. For example, when the conveying device is placed on a fork to convey an article formed by bundling a plurality of plastic rod members, a single rod member is sandwiched between the first recess and the second recess. It may be locked and transported.

  ○ The transport device with the locking device is not limited to the low lift truck. For example, a lock device may be mounted on a forklift as a transport device. In this case, even if the forklift does not perform the tilting operation, it is possible to restrict the movement of the article placed on the fork of the forklift during transportation. Further, if a lock device is mounted on the forklift, it is possible to prevent the load placed on the fork from falling over. Moreover, you may mount in the towing vehicle which pulls and conveys a car trolley | bogie etc. In this case, if the locking device is attached to the rear portion of the towing vehicle and the first recess formed in the first support member and the second recess formed in the second support member are arranged to face the rear side, the towing vehicle is The pipe part of the towed car cart can be pinched and locked.

(A) is a side view of a low lift truck, (b) is a rear view of a low lift truck. The schematic plan view of the locking device in this embodiment. (A) is an enlarged plan view of a 1st support plate and a 2nd support plate, (b) is a partial enlarged plan view which shows the link member connected with the connection link member and the connection link member. The side view which shows the support structure of a lock lever and a lock lever. The top view which shows the state in the middle of the locking device locking the pipe part in this embodiment. The top view which shows the state which the locking device locked the pipe part in this embodiment. The top view which shows the state which the locking device released the lock | rock of the pipe part in this embodiment.

Explanation of symbols

  P2: Rotation center of the connecting link member, 11 ... Low lift truck as a transport device, 18 ... Car cart as an article, 20 ... Pipe portion as a rod-shaped portion, 27 ... Lock device, 29 ... First base portion, 31 ... 2nd base part, 32 ... Connection link member, 34A, 34B ... 1st support plate as 1st support member, 35A, 35B ... 2nd support plate as 2nd support member, 39A, 39B ... As an engaging part , 43A, 43B ... Spring member for supporting plate as biasing means, 44A ... First end, 45A ... Second end, 52 ... Lock lever, 67 ... Link member for operation, 70 ... Interlocking avoidance part A first link member as a link member, 75B a second link member as a link member.

Claims (3)

A first support member and a second support member, which are rotatably supported with respect to a base portion installed in the transport device, and sandwich a bar-shaped portion of an article when in a locked posture;
A lock position where the first support member and the second support member can be held in the lock posture, and a lock release position where the pinching of the rod-like portion by the first support member and the second support member can be released. And a lock lever operated by
The first support member is always arranged in the locking posture,
The second support member abuts on the first support member and rotates the first support member during the rotation from the receiving posture allowing the rod-shaped portion of the article to be pressed to the locked posture. In the locking device that moves to the locking posture,
Before SL locking device further includes a second support member and engageable with the engaging portion together provided in the first support member,
Holding means for holding the lock lever in the locked position;
A connecting link member rotatably supported with respect to the base part;
An operation link member that connects the lock lever and the connection link member, and interlocks the connection link member in synchronization when the lock lever is operated to the unlock position;
A link member that connects the connection link member and the first support member and interlocks the first support member when the connection link member rotates;
When the second support member moves from the receiving posture to the locked posture, the interlock avoiding portion that brings the link member and the link member for operation into a non-interlocking state;
Biasing means for biasing the first support member so as to be in the locked posture;
In a state where the second support member rotates from the receiving posture to the locking posture, the lock lever is locked because the link member and the link member for operation are not linked by the interlock avoidance unit. Allowing the second support member to rotate while being held in position;
In a state where the second support member is rotated from the receiving posture to the lock posture, the engaging portion engages with the second support member and the lock lever is positioned at the lock position, so that the first 2. The locking device, wherein the support member is held in the locking posture. Two sets of the first support member and the second support member are disposed so as to sandwich the connecting link member therebetween,
Two link members for connecting the two first support members to one connection link member are provided,
The locking device according to claim 1, wherein the two link members are positioned symmetrically with respect to a rotation center of the connection link member. The said urging means is comprised from the spring member with which the 1st end part was attached to the said base part, and the 2nd end part was attached to the said 1st support member. Item 3. The locking device according to Item 2.

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