JP2005200191A - Moving rack device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the operating performance of a lock means to lock a movable load table able to emerge and retract in the fore-and-aft direction, the locking being generated in the retracting limit position and the advancing limit position. <P>SOLUTION: The moving rack device is equipped with the movable load table 6 able to emerge and retract in the fore-and-aft direction and the lock means 43 to lock the load table 6 in the retracting limit position and the advancing limit position, wherein the lock means 43 is composed of a retracting limit side engaging member 48 and an advancing limit side engaging member 49 installed on the side with a rack frame 2, a member 47 to be engaged installed at the tail of the load table 6 to make automatic engagement with the members 48 and 49, an operating tool (lever 46) installed at the forefront of the load table 6, and an interlocking mechanism (rotary operation shaft 45) to put the operating tool (lever 46) interlocking with the member 47 to be engaged so that the operating tool (lever 46) can disengage the member 47 to be engaged. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a movable shelf device including a movable loading platform that can be moved back and forth, and locking means for locking the movable loading platform at a retreat limit position and an advance limit position.

As described in Patent Document 1, the conventional locking means in this type of movable shelf apparatus is provided with locked portions at both front and rear ends of the side of the movable carrier, and the retreat limit position is located along the moving path of the movable carrier. The locking member is pivotally supported so as to be adjacent to the front end portion of the movable loading platform, and when the movable loading platform is at the retreat limit position, the locking member is automatically engaged with the locked portion on the front end side of the movable loading platform. The movable carrier is locked at the retracted limit position, and when the movable carrier is at the advanced limit position, the locking member is automatically engaged with the locked portion at the rear end side of the movable cargo bed to bring the movable cargo base into the advanced limit position. It was configured to lock, and when moving the movable loading platform, the lock was released by operating the locking member to be removed from the locked portion.
No. 2-15847

  However, in the lock means having the conventional configuration as described in Patent Document 1, the locking member that also serves as the unlocking operation tool is disposed on the rack frame side next to the front end portion of the movable cargo bed at the retreat limit position. Therefore, there is no problem when the unlocking operation is performed on the locking member in order to pull out the movable loading platform at the retreat limit position, but the locking member is retracted to retract the movable loading platform at the advance limit position. When the unlocking operation is performed, the locking member is located on the side of the rear end of the movable cargo bed at the advance limit position, so that an operator located in front of the movable cargo bed reaches out and holds the locking member. If it is a multistage movable shelf that is configured to protrude large from the plane area of the rack frame, the movable platform must be operated, Don't wrap around Also caused a problem that can not be operated the bus locking member.

  An object of the present invention is to provide a movable shelf device capable of solving the above-described conventional problems. When the means is shown with reference numerals of embodiments to be described later, A movable shelf device comprising a movable platform 6 that can be retracted and a lock means 43 that locks the movable platform 6 at a retreat limit position and an advance limit position, wherein the lock means 43 is provided on the rack frame 2 side. The retraction limit side locking member 48 and the advancing limit side locking member 49 disposed at the rear end of the movable cargo bed 6 and the retraction limit side locking member 48 and the advancing limit side locking member. 49, the operating member (operating lever 46) disposed at the front end of the movable cargo bed 6, and the operating member (operating lever 46). The operation tool (operation lever 46) and the locked member so that the lock can be released. It is constructed from the interlocking mechanism for interlocking the 7 (rotational operation shaft 45).

  When carrying out the present invention having the above-described configuration, specifically, as described in claim 2, the interlocking mechanism is supported so as to be able to rotate on the movable platform 6 in parallel with the moving direction of the movable platform 6. The operation tool 45 includes an operation lever 46 attached to the front end of the rotation operation shaft 45, and the locked member 47 projects laterally to the rear end of the rotation operation shaft 45. The retraction limit side locking member 48 and the advance limit side locking member 49 are reversed so that the locked member 47 can ride on and pass through. It can be formed in a stop projection shape.

  According to a third aspect of the present invention, the locked member 47 is urged to rotate downward by gravity acting on the locked member 47 and the operation lever 46 without using a spring together. Can do.

  Further, as described in claim 4, an intermediate movable frame 5 is provided that can move in and out in the same direction as the movable carrier 6, and the movable carrier 6 is supported by the intermediate movable frame 5 so as to be movable in and out. In the case of a multi-stage movable shelf, the locked member 47 in a lateral posture can be supported by the side upper end 5a of the intermediate movable frame 5.

  According to the movable shelf device of the present invention having the above-described configuration, the unlocking operation tool of the locking means for locking the movable cargo bed at the retreat limit position and the advance limit position is provided at the front end portion of the movable cargo bed and is movable. Since it moves in and out together with the loading platform, even when the movable loading platform is pulled out, the operator standing in front of the movable loading platform can easily perform the unlocking operation without extending the hand. Therefore, even when the movable platform is a large stage and the whole is a multistage movable shelf configured to protrude forward from the planar area of the rack frame, it is not necessary for the operator to go around the movable platform. It is also possible to install the device close to the wall.

  In addition, according to the structure of Claim 2 or Claim 3, this invention can be implemented cheaply with a simple structure. According to the fourth aspect of the present invention, the stopper that prevents the locked member from being turned downward by the urging force from the horizontal posture can be used as the intermediate movable frame that supports the movable bed. And the structure can be further simplified.

  A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numerals 1A and 1B denote movable shelves that are installed on the rack frame 2 in two upper and lower stages, and 3 denotes the lowest stage of the rack frame 2. It is the frame for fall prevention provided in. Since the movable shelves 1A and 1B have the same configuration, the structure will be described below by taking the lower movable shelf 1A as an example. Of course, the number of movable shelves is not limited to two.

  As shown in FIGS. 2 to 5, 11, and 12, the movable shelves 1 </ b> A and 1 </ b> B include a pair of left and right fixed rails 4 a and 4 b fixed at the same level inside the rack frame 2, an intermediate movable frame 5, and It is composed of a movable bed 6. The intermediate movable frame 5 includes a front supporting horizontal shaft roller 7 that is pivotally supported below the front ends of the fixed rails 4a and 4b, and the left and right sides of the intermediate movable frame 5 near the rear end so as to fit in the fixed rails 4a and 4b. The rear support horizontal shaft roller 8 supported on the side, the front steadying vertical shaft roller 9 supported on the inner side of the front ends of the fixed rails 4a and 4b, and the fixed rails 4a and 4b are fitted. 2 is supported so as to be able to move back and forth in the front-rear direction via a back-rest steady vertical shaft roller 10 that is pivotally supported on both the left and right sides near the rear end of the intermediate movable frame 5. Furthermore, as shown in FIG. 5, the rear limit position vertical shaft roller 10 is located in the fixed rails 4a and 4b, and the retreat limit position where the front ends of the fixed rails 4a and 4b substantially coincide with the front ends of the intermediate movable frame 5. In the middle position in the longitudinal direction It is limited between the advanced limit position abutting the stopper plate 11 which is set.

  The movable platform 6 is pivotally supported on the left and right sides near the rear end of the movable platform 6 so as to be fitted into the intermediate movable frame 5 and the front support horizontal shaft roller 12 that is pivotally supported on the inside of the front end of the intermediate movable frame 5. The rear support horizontal shaft roller 13, the front steady-state vertical shaft roller 14 supported on the inner side of the front end of the intermediate movable frame 5, and the guide rails on both the left and right sides of the intermediate movable frame 5 are fitted. 2 is supported so as to be able to move back and forth in the front-rear direction via a back-rest steady vertical shaft roller 15 that is pivotally supported on the left and right sides near the rear end of the movable carrier 6. The stroke of the movement is as shown in FIG. The retract limit position where the front end of the intermediate movable frame 5 and the front end of the movable carrier 6 substantially coincide with each other, and as shown in FIG. System attached to the middle position It is limited between the advanced limit position abutting the plate 16. When the intermediate movable frame 5 and the movable loading platform 6 are each pulled out to the advance limit position, the movable loading platform 6 protrudes forward from the planar area of the rack frame 2 as shown in FIGS. 5 and 12. become.

  Although not clearly shown in the figure, as is conventionally known, the movable platform 6 including the movable movement of the intermediate movable frame 5 so that the movable shelves 1A and 1B (movable loading platform 6) can be easily moved out and out. Of all the exit / retreat movement paths, gravity moves down in the advance direction from the retreat limit position to the middle position, and gravity rises in the retreat direction from the intermediate position to the advance limit position. The relative positions of the fixed rails 4a and 4b, the guide rails on the left and right sides of the intermediate movable frame 5, and the supporting horizontal shaft rollers 7, 8, 12, and 13 are set.

  The fall prevention frame 3 is supported by a pair of left and right guide rails 17a, 17b fixed in the front-rear direction inside the lower end of the rack frame 2 so as to be movable back and forth in the front-rear direction. As shown in FIG. 14, it is composed of a pair of left and right front and rear direction members 18a fitted to the guide rails 17a and 17b, and a left and right direction member 18b connecting the both front and rear direction members 18a, as shown in FIGS. The horizontal shaft rollers 19 and 20 and the vertical shaft rollers 21 and 22 for steadying are pivotally supported at the intermediate position in the longitudinal direction and the rear end portion of the longitudinal member 18a, and the height can be adjusted at the tip. A grounding body 23 is provided. As shown in FIG. 2, the overturning prevention frame 3 has a retreat limit position where the entirety is accommodated in the guide rails 17a and 17b, and almost half of the longitudinal length as shown in FIGS. The level member 18b moves back and forth between the advance limit positions projecting forward from the front ends of the guide rails 17a and 17b, and the left and right direction member 18b can be used even when the fall prevention frame 3 is at the advance limit position. It arrange | positions so that it may be located back from the front end of guide rail 17a, 17b.

  Further, as shown in FIGS. 4, 5, 13, and 14, the fall prevention frame 3 is located at the upper limit position on the upper surface in the longitudinal direction of both longitudinal members 18a of the fall prevention frame 3. The rod-like member 25 close to the liner plate 24 attached to the upper inner surface in the vicinity of the front ends of the guide rails 17a and 17b is fixed in the horizontal direction. The liner plate 24 and the rod-shaped member 25 have a downward rotational force acting on the front end portions of the guide rails 17a and 17b when a forward overturning force is applied to the rack in a state where the overturn preventing frame 3 is in the advanced limit position. Is received by the fall prevention frame 3, and at this time, the front end grounding body 23 of the fall prevention frame 3 is grounded (landing).

  Next, an interlocking mechanism between the movable shelves 1A and 1B and the fall prevention frame 3 will be described. This interlocking mechanism moves the fall-preventing frame 3 in the same direction in conjunction with the movement of the movable shelves 1A and 1B, and the movable shelf moves in and out of each movable shelf 1A and 1B. Cam rails 26 arranged in parallel to each other, cam follower means 27 arranged on the side of the fall-preventing frame 3 so as to correspond to each of the fixed cam rails 26, and each of the movable shelves 1A and 1B. A pusher 28 and a movable shelf pull-out prevention stopper 29 which is provided for each movable shelf 1A, 1B and which is switched to the release posture when the overturning prevention frame 3 is in the retreat limit position are provided.

  As shown in FIGS. 2 to 5 and 13, the fixed cam rail 26 has support members at both front and rear ends arranged in parallel with the fixed rail 4 a on the upper side of the fixed rail 4 a on one side of each movable shelf 1 A, 1 B. It is attached to the fixed rail 4a through 30 and has a horizontal portion 26a which is lowered by one step and rising corner portions 26b and 26c at both front and rear ends thereof.

  The toppling prevention frame 3 is positioned outside the fixed rails 4a of the movable shelves 1A and 1B on the front-rear direction member 18a on the side where the fixed cam rail 26 is located (on the fixed rail 4a side). A columnar member 31 is erected vertically. This columnar member 31 is located behind the rear rising corner portion 26c of the fixed cam rail 26 when the fall prevention frame 3 is in the retreat limit position, and its upper end is a rack as shown in FIG. A vertically open groove-shaped guide rail 32 fixed to the upper end side of the frame 2 in the front-rear direction is engaged via a vertical shaft roller 33. Thus, the cam follower 27 is attached at a height corresponding to each fixed cam rail 26 of the columnar member 31. The upper half of the guide rail 17a on the side where the columnar member 31 is located, among the guide rails 17a, 17b that also serve as the installation legs for guiding the fall prevention frame 3, is the length of the path of movement of the fall prevention frame 3. The columnar member 31 is excised so that it can move freely, and the retreat limit position and the advance limit position of the fall-preventing frame 3 (columnar member 31) can be regulated at both front and rear ends of the excision 34.

  As shown in FIGS. 6 and 7, the cam follower 27 is supported on the inner side of the columnar member 31 so that each base portion can be opened / closed swingably at the distal end side of one support shaft 35 in the horizontal direction. A pair of front and rear cam driven arms 36 and 37, a torsion coil spring 38 that urges the cam driven arms 36 and 37 to close each other, and a base side of the support shaft 35 are loosely fitted. A stationary member 40 having a rectangular block shape is fixed to the ring 39 and hangs down on the lower side of the support shaft 35 due to gravity. The support shafts parallel to the support shaft 35 are provided at the tips of the cam driven arms 36 and 37. The cam driven rollers 36a and 37a are pivotally supported. The driven member 40 has a lateral width that reaches the lower position of the pair of front and rear cam driven arms 36 and 37 that are arranged side by side on the support shaft 35.

  Thus, the two cam driven rollers 36a and 37a are arranged so as to fit within the width of the fixed cam rail 26. When the fall prevention frame 3 is at the retreat limit position as shown in FIG. The follower rollers 36a and 37a sandwich the rear corner 26c of the fixed cam rail 26 with the urging force of the torsion coil spring 38 in a posture in which the rear cam follower arm 37 stands, and as shown in FIG. When the frame 3 is in the advanced limit position, both cam driven rollers 36a and 37a are caused to urge the front corner 26b of the fixed cam rail 26 with the biasing force of the torsion coil spring 38 in a posture in which the front cam driven arm 36 stands up. It is comprised so that it may pinch | interpose.

  As shown in FIGS. 2 to 5 and 13, the pusher 28 is fixed to the side of the fixed cam rail 26 in the vicinity of the rear end of the movable loading platform 6 constituting the movable shelves 1 </ b> A and 1 </ b> B. It is made up of round bars. Specifically, the pusher (round bar) 28 has a base fixed to the inner side of the chevron 28a, and is attached by fixing one end of the chevron 28a to the side surface of the movable carrier 6. Yes. Thus, this pusher 28 enters horizontally into the movement path of the driven member 40 that hangs down on the lower side of the support shaft 35 due to gravity. As shown in FIG. 2, the movable shelves 1A and 1B and the fall prevention frame When 3 is in the retreat limit position, it is arranged so as to be located behind the driven member 40.

  As shown in FIGS. 2 to 5 and 13, the movable shelf pull-out preventing stopper 29 is pivotally supported by a horizontally-supported horizontal support shaft 41 inside the vicinity of the rear end of the fixed cam rail 26. However, as shown in FIG. 2, when the fall-preventing frame 3 is in the retreat limit position, it is lifted rearward and upward at the tip of the support shaft 35 of the cam follower 27, and the movable shelves 1A, 1B side The release posture is retracted upward from the movement path of the pusher 28, and as shown in FIG. 3, the tipping prevention frame 3 swings downward by gravity as it moves forward, and its tip (lower end) has a movable shelf. When the pusher 28 is moved by being received by a horizontal belt-like fixing plate 42 which is disposed on the upper surface of the fixed rail 4a constituting the 1A and 1B, more precisely, on the upper side of the fixed rail 4a and connected to the fixed rail 4a. It is configured to retain the movable shelf drawer blocking position entering obliquely rearward downward within. Although not shown in the drawing, the horizontal belt-like fixing plate 42 covers the cut region above the rear end of the fixed rail 4a, and a support member 30 that supports the rear end of the fixed cam rail 26 is the horizontal belt-like fixing plate. 42 is fixedly attached.

  As shown in FIGS. 8 to 12 and 14, each movable shelf 1 </ b> A, 1 </ b> B has a movable shelf on the side opposite to the side where the interlocking means (fixed cam rail 26, cam follower 27, etc.) is located. Locking means 43 is provided for locking 1A and 1B at the retreat limit position and the advance limit position. The locking means 43 includes a rotary operation shaft 45 facing in the front-rear direction supported by a cylindrical support member 44 fixed to both front and rear ends of the side surface of the movable load platform 6, and a movable load platform at the front end of the rotation operation shaft 45. 6 is disposed above the rear end of the fixed rail 4b, an operating lever 46 mounted so as to protrude forward from 6, a locked member 47 projecting from the rear end of the rotary operation shaft 45 at a right angle. The retraction limit side locking member 48 and the advancing limit side locking member 49 projecting above the front end portion of the fixed rail 4b.

  More specifically, the locked member 47 includes a right-angled laterally bent portion 47a formed at the rear end of the rotation operation shaft 45, and a plate material 47b fixed to the corner of the right-angled laterally-folded portion 47a. It is configured. Further, the retraction limit side locking member 48 is connected to the fixed rail 4b in a state of covering the upper surface of the fixed rail 4b constituting the movable shelves 1A and 1B, more precisely, the cut-out portion on the rear end upper side of the fixed rail 4b. It is composed of a plate material fixedly projected on the upper side of the horizontal band-shaped fixed plate 50, and the locked member 47 that moves rearward is pushed upward to automatically pass and lock backward. However, in the locked state, it has a non-return protrusion shape that can prevent the locked member 47 from moving forward. The advance limit side locking member 49 is formed by fixing a single thick plate to the upper side of the front end of the fixed rail 4b in a vertical posture, and the locked member 47 moving forward is pushed upward. It can be automatically passed forward and locked, but in the locked state, it has a non-return protrusion shape that can prevent the locked member 47 from moving backward. As shown in FIG. 14, the locked member 47 is always received by the upper side edge 5a of the intermediate movable frame 5 and is held in a substantially horizontal horizontal posture. The rotary operation shaft 45 is fixed so as to be inclined obliquely downward on the same side as 47.

  Next, the usage and operation of the movable shelf apparatus having the above configuration will be described. As shown in FIGS. 2, 8, and 11, in a state where the movable shelves 1 </ b> A and 1 </ b> B are stored in the plane area of the rack frame 2, The fall prevention frame 3 is also in the retreat limit position, and only the front end portions of the guide rails 17a and 17b serving as installation legs protrude from the planar area of the rack frame 2. At this time, the cam followers 27 corresponding to the movable shelves 1A and 1B on the side of the toppling prevention frame 3 are, as shown in FIG. 2, the rear rising corners of the fixed cam rails 26 corresponding to the movable shelves 1A and 1B. 26c is sandwiched between cam follower arms 36 and 37 (cam follower rollers 36a and 37a), and this fall force (holding force by torsion coil spring 38) causes the fall prevention frame 3 to reach the retreat limit position. Is retained. On the other hand, as shown in FIGS. 8 and 11, the locking means 43 of each movable shelf 1 </ b> A, 1 </ b> B is in a state in which the locked member 47 is fitted on the rear side of the retraction limit side locking member 48. Thus, the movable shelves 1A and 1B (movable loading platform 6) are prevented from being pulled out.

  When pulling out the movable shelf, for example, the lower movable shelf 1A from the above state, first, the operation lever 46 in the lock means 43 of the movable shelf 1A is turned upward and inward as shown by a virtual line in FIG. The locked member 47 is rotated upward and inward via the rotation operation shaft 45 so as to be disengaged upward from the retraction limit side locking member 48, and the movable shelf 1A (movable loading platform 6) is switched out. When the movable carrier 6 is pulled forward in such a state, the movable carrier 6 is moved to the advanced limit position with respect to the intermediate movable frame 5 (the advanced limit position where the rear steady-state vertical shaft roller 15 abuts against the stop plate 16 shown in FIG. 4). Is pulled out, and then the intermediate movable frame 5 is pulled out integrally with the movable loading platform 6, so that the intermediate movable frame 5 is in the advancing limit position with respect to the fixed rails 4a and 4b (vertical axis roller for rear side stabilization shown in FIG. By pulling out the movable loading platform 6 until 10 reaches the advance limit position where it abuts against the stop plate 11, the pull out of the movable shelf 1A to the advance limit position is completed.

  After the operation of pulling out the movable shelf 1A is started, when the locked member 47 is moved to the front position from the retreat limit side locking member 48, when the hand is released from the operation lever 46, as shown in FIG. Then, due to the gravitational force acting on the operation lever 46 and the like, the locked member 47 is turned down to the original posture via the rotation operation shaft 45 and is received by the upper edge 5a on the side of the intermediate movable frame 5 so as to be in a substantially horizontal horizontal posture. Since it is pulled out integrally with the movable carrier 6 while being held, the advancement is made so that the locked member 47 rides on the advancement limit side locking member 49 immediately before the movable shelf 1A is pulled out to the advancement limit position as described above. When passing through the limit side locking member 49 forward and the movable shelf 1A is pulled out to the advanced limit position, as shown in FIGS. Move to the front, movable shelf It will lock the A to advance limit position. In other words, the locked member 47 and the advance limit side locking member 49 prevent the movable shelf 1 </ b> A from retreating unexpectedly from the advance limit position.

  On the other hand, as shown in FIG. 2, the driven member 40 of the cam driven means 27 holding the rear rising corner portion 26 c of the fixed cam rail 26 is moved forward together with the movable bed 6 by pulling out the movable bed 6. The pushing tool 28 to be pushed backs up. Thus, although the driven member 40 tries to rotate forward around the support shaft 35, the rotation is prevented by the cam driven arm 36 and the horizontal portion 26 a of the fixed cam rail 26. The movement is transmitted to the fall prevention frame 3 via the driven member 40, the cam follower arm 36, the support shaft 35, and the columnar member 31, and the fall prevention frame 3 at the retreat limit position is integrated with the movable bed 6. Will move to advance. The other cam follower arm 37 that has stood up at the rear side of the rear rising corner portion 26c of the fixed cam rail 26 is tilted rearward and downward against the biasing force of the torsion coil spring 38. To the lower side of the horizontal portion 26a. That is, the two cam driven arms 36 and 37 of the cam driven means 27 are moved forward and forward by the horizontal portion 26a of the fixed cam rail 26, as shown by solid lines in FIGS.

  When the movable carrier 6 is pulled out to reach the advance limit position with respect to the intermediate movable frame 5, the cam follower 27 that has moved forward integrally with the movable carrier 6 rises in front of the fixed cam rail 26 as shown in FIG. 4. When the corner 26b is reached and the cam follower roller 36a is disengaged forward from the horizontal portion 26a of the fixed cam rail 26, the cam follower arm 36, which is pushed back by the driven member 40 and receives a rotational force in the upper front direction, is supported by the support shaft 35. It will be in the state which can be rotated upwards around. Therefore, the driven member 40 and the cam follower arm 36, which are pushed back by the pusher 28 on the movable carrier 6 side, rotate upward integrally around the support shaft 35, and only the pusher 28 passes forward. It will be. At this time, as shown in FIG. 4, the overturning prevention frame 3 has reached the advanced limit position, and the two cam driven arms 36 and 37 (cam driven rollers 36a and 37a) of the cam driven means 27 are fixed to the fixed cam rail 26. Since the front rising angle portion 26b is sandwiched by the urging force of the coil spring 38, the fall prevention frame 3 is held at the advanced limit position via the columnar member 31 provided with the cam follower 27. .

  As apparent from the above-described operation, when the lock means 43 is released and the movable shelf 1A (movable loading platform 6) is pulled out to the advance limit position, the overturning prevention frame 3 is automatically pulled out to the advance limit position, and the movable shelf 1A The (movable loading platform 6) is automatically locked by the locking means 43 at the advance limit position, and the toppling prevention frame 3 is held at the advance limit position.

  Furthermore, as shown in FIG. 2, the movable shelf pull-out prevention stopper 29 supported in a state where it is lifted at the tip end portion of the support shaft 35 of the cam follower 27 is movable movable shelf 1A ( A movable shelf pull-out preventing posture in which the cam follower 27 (support shaft 35) is moved downward by gravity due to the forward movement of the movable carrier 6) and the tip is received by the fixed rail 4a (horizontal belt-like fixed plate 42). However, the cam follower 27 corresponding to the movable shelf 1B that is not pulled out is operated in the forward movement of the cam follower 27 and the switching action of the movable shelf pullout prevention stopper 29 to the movable shelf pullout prevention posture. And the movable shelf pull-out prevention stopper 29 are also performed in the same manner, so that the movable shelf 1A is pulled out and left in the retreat limit position as described above. Even when the movable shelf 1B to be pulled out is further pulled out by the movable shelf pull-out prevention stopper 29, the pusher 28 that moves forward integrally with the movable platform 6 of the movable shelf 1B is switched to the movable shelf withdrawal prevention posture. Since the forward movement is prevented, the movable shelf 1B cannot be pulled out. That is, when one of the movable shelves 1A and 1B is pulled out, the other movable shelf cannot be pulled out.

  When returning the drawn movable shelf 1A, the operation lever 46 of the locking means 43 is operated in the same way as when unlocking, and the locked member 47 is released from the advance limit side locking member 49 to the unlocking posture. The movable shelf 1A may be moved back and forth in the switched state. Also in this case, when the locked member 47 passes the advance limit side locking member 49 backward, the operation lever 46 is released, and the locked member 47 is moved by gravity at the upper end 5a on the side of the intermediate movable frame 5. By returning to the supported horizontal and horizontal posture, the locked member 47 passes over the retraction limit side locking member 48 and passes immediately before the movable shelf 1A (movable loading platform 6) reaches the retreat limit position. When the movable shelf 1A (movable loading platform 6) reaches the retreat limit position, as shown in FIGS. 8 and 11, the locked member 47 falls to the rear side of the retreat limit side lock member 48 and engages. Then, the movable shelf 1A (movable loading platform 6) is locked at the retreat limit position.

  On the other hand, as shown in FIG. 5, the pusher 28 that moves backward together with the movable platform 6 engages with the front rising corner 26b of the fixed cam rail 26 to hold the fall prevention frame 3 at the advanced limit position. The driven member 40 of the cam driven means 27 (which is in a state of being hung directly under the support shaft 35 by gravity) is pushed rearward, but the rearward rotation of the driven member 40 is the horizontal portion of the fixed cam rail 26. Since it is blocked by the cam follower arm 37 (cam follower roller 37a) that is in contact with 26a, the pusher 28 that moves backward together with the movable carrier 6 has the driven member 40, the cam follower arm 37, the support shaft 35, And the fall prevention frame 3 is moved backward from the advance limit position via the columnar member 31. Then, after the movable platform 6 reaches the retreat limit position with respect to the intermediate movable frame 5, the intermediate movable frame 5, the movable platform 6, and the fall prevention frame 3 move together as a unit.

  The cam follower arm of the cam follower 27 that moves backward together with the fall prevention frame 3 when the intermediate movable frame 5 and the movable carrier 6 and the fall prevention frame 3 are moved backward to the position immediately before the retreat limit position. 37 (cam driven roller 37a) is moved rearward from the horizontal portion 26a of the fixed cam rail 26, and the cam driven arm 37 can be rotated upward, so that it is pushed rearward by the pressing tool 28 on the movable bed 6 side. The driven member 40 and the cam follower arm 37 that have been rotated together around the support shaft 35 are rotated rearward and upward, and the pusher 28 moves rearwardly under the driven member 40. At this time, the distal end portion of the support shaft 35 of the cam follower 27 pushes up the movable shelf pull-out prevention stopper 29 to switch to the movable shelf pull-out prevention release posture. The lower side of the stopper 29 also moves rearwardly.

  As described above, when the movable shelf 1A and the overturn prevention frame 3 reach the original retreat limit position shown in FIG. 2, the two cam driven arms 36 and 37 (cam driven rollers 36a, 37a) pinches the rear rising corner portion 26c of the fixed cam rail 26 so that the fall prevention frame 3 is held at the retreat limit position, and the retraction limit side locking member 48 rides immediately before and passes backward. The locked member 47 of the locking means 43 falls to the rear side of the retraction limit side locking member 48 and engages to lock the movable shelf 1A at the retreat limit position.

  The fall prevention frame 3 is not essential for the present invention. Even when the fall prevention frame 3 is provided, the interlocking means between the fall prevention frame 3 and the movable shelves 1A and 1B is not limited to that of the above embodiment. Of course, the number of movable shelves and the structure of each movable shelf itself are not limited to those shown in the above embodiment. Further, the operating tool of the locking means 43 may be a rotary knob type operating tool or a push button type operating tool, and the arrangement position may be an intermediate position in the width direction of the front end portion of the movable cargo bed 6. good. Further, the locked member 47 of the lock means 43 is not limited to the lever type shown in the embodiment, and the position of the locked member 47 can also be set to the intermediate position in the width direction of the rear end portion of the movable cargo bed 6. is there. Accordingly, the attachment position of the retraction limit side locking member 48 and the advance limit side locking member 49 on the rack frame 2 side is not limited to the movable rail supporting fixed rail 4b fixed to the rack frame 2 shown in the embodiment. The retraction limit side locking member 48 and the advance limit side locking member 49 can also be attached to a beam material or the like installed on the rack frame 2 so as to be positioned below the moving path of the movable carrier 6. Further, the interlocking mechanism is not limited to the rotation operation shaft 45, and an appropriate one such as a release wire can be used according to the positional relationship between the locked member 47 and the operation tool (operation lever 46).

It is a side view of the whole movable shelf apparatus which shows the state which pulled out the movable shelf of the upper stage with a virtual line. It is a partially longitudinal side view which shows a lower movable shelf and a fall prevention frame from the side with an interlocking means. FIG. 3 is a partially longitudinal side view illustrating a state in which the lower movable shelf in FIG. 2 is slightly pulled out. FIG. 3 is a partially longitudinal side view showing a state where the lower movable shelf in FIG. 2 is pulled out to an intermediate position. FIG. 3 is a partially longitudinal side view showing a state in which the lower movable shelf in FIG. 2 is pulled out to the advance limit position. It is a top view which shows a cam follower. It is a partially vertical side view which shows the cam follower from the inner side. It is a partially vertical side view which shows a lower movable shelf and a fall prevention frame from the side with a locking means. FIG. 9 is a partially longitudinal side view illustrating a state in which the lower movable shelf in FIG. 8 is slightly pulled out. It is a partially longitudinal side view which shows the state which pulled out the lower stage movable shelf of FIG. 8 to the advance limit position. It is a partially notched top view which shows the state which locked the lower movable shelf to the retreat limit position. It is a partially cutaway top view which shows the state which pulled out and locked the lower movable shelf to the advance limit position. It is an enlarged front view which shows the principal part by the interlocking means side. It is an enlarged front view which shows the principal part by the side of a locking means.

Explanation of symbols

1A, 1B Movable shelf 2 Rack frame 3 Fall prevention frames 4a, 4b A pair of left and right fixed rails 5 Intermediate movable frame 6 Movable load platform 7, 8, 12, 13, 19, 20 Horizontal shaft rollers 9, 10, 14, for support 15, 21 and 22 Stabilizing vertical shaft rollers 11 and 16 Stop plates 17a and 17b Installation leg / guide rail 18a A pair of left and right longitudinal members 18b Left and right direction members 23 Adjustable grounding body 24 Liner plate 25 Bar-shaped member 26 Fixed cam rail 26a Cam rail horizontal portion 26b, 26c Cam rail rising corner portion 27 Cam driven means 28 Pushing tool 29 Stopper 31 for preventing movable shelf withdrawal Columnar member 32 Groove guide rail 33 Vertical shaft roller 35 Support shaft 36, 37 Cam driven arm 36a, 37a Cam driven roller 38 torsion coil spring 39 Ring 40 Driven member 43 Locking means 45 Rotating operation shaft (interlocking mechanism)
46 Control lever (control tool)
47 Locked member 48 Retraction limit side locking member 49 Advance limit side locking member

Claims (4)

  A movable shelf device comprising a movable loading platform that can be moved back and forth, and locking means for locking the movable loading platform at a retreat limit position and an advance limit position, wherein the lock means is disposed on the rack frame side. The retraction limit side locking member and the advance limit side locking member, which are disposed at the rear end of the movable cargo bed, and are automatically engaged with the retraction limit side locking member and the advance limit side locking member. A locked member, an operating tool disposed at the front end of the movable platform, and an interlock that links the operating tool and the locked member so that the locked member can be unlocked by the operating tool. A movable shelf device composed of a mechanism.   The interlock mechanism is composed of a rotary operation shaft that is supported so as to be able to rotate on the movable load platform in parallel with the moving direction of the movable load platform, and the operation tool is composed of an operation lever attached to the front end of the rotary operation shaft, The locked member is protruded laterally at the rear end of the rotation operation shaft and biased to rotate downward, and the retraction limit side locking member and the advance limit side locking member are: The movable shelf apparatus according to claim 1, wherein the locked member is formed in a check protrusion shape on which the locked member can ride and pass.   The movable shelf apparatus according to claim 2, wherein the locked member is biased so as to rotate downward by gravity acting on the locked member and the operation lever.   An intermediate movable frame that can move in and out in the same direction as the movable carrier is provided, the movable carrier is supported on the intermediate movable frame so as to be movable in and out, and the locked member in a lateral posture is attached to the intermediate movable frame. The movable shelf apparatus of Claim 2 or 3 supported by a side edge upper end.