JPS6326041Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a locking device for a pull-out shelf in a rack for storing articles.

[Conventional technology]

In factories, warehouses, etc., racks with shelves that can be freely pulled out to carry items must be designed so that the shelves can be locked in two positions: pulled out far toward the front of the rack, and fully pushed in, to prevent the shelves from accidentally retracting when loading or unloading items, or from accidentally protruding from their stored position. Furthermore, in factories, etc., heavy items are often loaded and unloaded using indoor cranes, and since workers must operate the cranes with one hand, the locking mechanism must be simple to operate and operate reliably.

As a prior art for this purpose, Utility Model Application No. 56-170118
In the publication, on the front side of the rack main body, the rear end of a locking rod is pivoted to a horizontal shaft located above the shelf so as to be movable up and down, and on the upper surface of one side of the shelf, the front free end of the locking rod is mounted on the upper surface of one side of the rack. The present invention proposes a structure in which a front stopper part and a rear stopper part that engage with a pin protruding laterally from the front and back are appropriately spaced from each other in the front and rear.

[The problem that the idea aims to solve]

According to this configuration, one tip of the pin protrudes horizontally from the front of the front strut, and the locking rod cannot be rotated more than 180 degrees.
For example, when the shelf is pushed in and the pin of the locking rod is engaged with the front stopper, to release it, rotate the pin slightly upward to remove it from the front stopper. When you pull out the shelf and then release your hand from the locking rod, the pin in the locking rod contacts the upper surface of one side of the shelf and slides as the shelf is pulled out, allowing the pin to pass over the upper surface of the rear stopper. Then, the rear end surface of the rear stopper portion and the pin become engaged.

On the other hand, when disengaging from the rear stopper part that restricts the pushing movement of the shelf in the drawn-out state, if you release the locking rod after pushing the shelf a little with the pin slightly raised, the front part of the rear stopper part can be released. When the lock is released, the shelf must be moved forward or backward a little before the locking lever can be released, so that the pin can be moved freely.

In this case, the operator has to move the locking rod up and down with one hand while moving the shelf back and forth with the other hand, which poses a danger in handling heavy objects. In particular, in the case of a shelf in a drawer state, there is a large distance from the front end of the shelf to the front of the rack body, so the rotation operation of the locking rod and the operation of pushing the shelf are performed almost simultaneously before and after the unlocking operation. The problem was that it was difficult to do so.

The present invention aims to solve this problem.

[Means to solve the problem]

Therefore, in the present invention, a front stopper part and a rear stopper part are provided on one side member of the shelf, which is supported between the left and right side frames of the rack body so that the drawer can be moved back and forth, and are appropriately spaced apart along the moving direction of the shelf. , the side frame adjacent to both stopper parts is located above one side member of the shelf, is movable up and down in the front and back part of the locking body, and is tiltable in a substantially horizontal direction perpendicular to the direction of movement of the shelf. A locking part is formed at the lower end of the front of the locking body, which can be locked to the stopper part by downward movement of the front part, so that the front part of the locking body faces the front surface of the rack main body, and A cradle is provided on the inner surface of the frame to support the front part of the locking body in an upward direction, while a cradle is provided on one side of the shelf to support the rear part of the locking body as the shelf moves forward or backward. The structure includes a guide body that abuts and guides the front part of the locking body to be removed from the cradle.

[Effect of invention]

In this way, the locking portion of the locking body supported on the side frame of the rack body so as to be movable up and down and tiltable in a substantially horizontal direction is locked to each of the stopper portions, and then the locking body is To remove the lock and release the lock, all you need to do is rotate the front part of the stopper upward and move it horizontally and then support it on the cradle in the side frame. The unlocked state can be maintained.

In this state, the rear part of the locking body is arranged in an inclined manner so that the front and rear longitudinal axis of the locking body intersects with the axis in the shelf movement direction in plan view so that the rear part of the locking body approaches a position closer to the center of the shelf.

Therefore, when the shelf is pushed in or pulled out in the unlocked state, the guide bodies provided at the front and rear midpoints of the shelf come into contact with the rear part of the locking body and receive the front part of the locking body. When removed from the stand, the locking body returns to a parallel state along the moving direction of the shelf, and the front locking part of the locking body is in contact with the upper surface of one side member of the shelf. Therefore, the shelf can be automatically locked to the other stopper portion at a substantially completed position of pushing in or pulling out the shelf.

[Effect of idea]

In this way, with the present invention, all you have to do is remove the locking body from the front or rear stopper part of the shelf and place it on the cradle of the side frame, and as the shelf moves, the guide body will move the locking body to the locked state of the shelf. Since the releasing operation of the locking body is directly connected to the locking action of the next stage, there is no malfunction and it is safe.

Moreover, the operation is extremely easy, as it only requires a slight operation of lifting the locking body a little and placing it on the cradle. The structure of the entire locking device is extremely simple as it requires only three parts: the locking body, the pedestal, and the guide body, and has the effect of reducing manufacturing costs.

After performing this lock release operation, the operator does not need to hold the locking body in hand, and can concentrate on moving the shelf back and forth, and can move the shelf forward and backward without any additional effort. At the same time, the locking body is removed from the cradle, and the locking body can take a posture ready to lock onto the stopper part, and is stabilized in a position where it can lock with both stopper parts, and the shelf can move forward or As the shelf moves backward, it automatically locks with the rear stopper or front stopper, and locks the shelf in the stored state so that it cannot be pulled out or when it is pulled out and cannot be pushed in. This improves work efficiency and improves workability when unlocking the shelf. This has the effect of improving safety.

〔Example〕

Next, an embodiment of the present invention will be described. Reference numeral 1 indicates front and rear supports 2, 2' having a rectangular cross section, etc.
This figure shows a rack main body in which side frames 4 are connected to each other and are erected at appropriate distances from each other to the left and right via cross beams 5, 5 in the frontage direction.

Reference numeral 6 indicates a shelf which is arranged in multiple stages vertically between the left and right side frames 4, 4 of the rack main body 1 and is movable back and forth. It is formed into a letter shape, with its openings facing outward, and wheels 9, 9, which fit into rails 8, 8, which will be described later, are rotatably supported at the rear end portions of both side members 7, 7.

The rail 8 is a U-shaped rail in cross section that is disposed facing the side members 7, 7 of the shelf 6 so as to guide and support both left and right sides of the shelf 6 in the front and back direction.
8 are arranged substantially horizontally inside the left and right side frames 4, 4, facing each other at the same height, a bracket 1 having an L-shaped cross section or the like is installed at the front and rear of each rail 8.
0 and 10' are fixed, and both brackets 10 and 10' are brought into contact with the side surfaces of the front and rear struts 2 and 2', and fixed with bolts or the like. In addition, the left and right front brackets 10
Support rollers 11 are provided to support the lower surfaces of the left and right side members 7 of the shelf 6, respectively.

Reference numerals 12 and 13 denote a front stopper part and a rear stopper part which are formed on the outer edge of the side member 7 on either the right or left side of the shelf 6 along the front and back direction of the drawer of the shelf 6 and are appropriately spaced from each other in the front and rear. In the embodiment shown in FIGS. 3 and 4, the outer edge of the upper plate of the left side member 7 of the shelf is cut out by an appropriate width into a rectangular shape in plan view to form a front stopper part 12 and a rear stopper part 13, respectively.

Reference numeral 14 denotes a front-rear midway point on a horizontal shaft 15 that projects horizontally at right angles to the moving direction of the shelf 6 at a position closer to the front of the inner surface of the side frame 4 facing one side edge of the shelf where the stoppers 12 and 13 are provided. This is a locking body that is supported so as to be movable up and down and tiltable in a substantially horizontal direction perpendicular to the direction of movement of the shelf. The center of gravity of the locking body 14 is formed so that the center of gravity is located at the lower end of the front of the locking body 14.
A locking part 17 that can be locked to the locking member 13 is formed in a downwardly stepped shape, while an abutment part 16 is provided at the rear of the locking body 14 to protrude toward the center of the shelf perpendicular to the direction of movement of the shelf.

Further, on the inner surface of the side frame 4, a cradle 18 for supporting the front part of the locking body 14 in an upward direction is provided, while on the upper surface of one side member 7 of the shelf 6, the front part of the shelf 6 or As the guide body 19 moves backward, the guide body 19 comes into contact with the contact portion 16 at the rear of the locking body 14, tilting the front part of the locking body 14 toward the center of the shelf, and removing it from the pedestal 18. will be established.

With this configuration, when the locking body 14 is placed on the pedestal 18 with the front part thereof facing upward as shown by the two-dot chain line in FIGS. 4 and 5, the locking portion 17 of the locking body 14 is removed from the front stopper portion 12, while the locking body 14, which is tiltably supported by the horizontal shaft 15, is tilted so that its rear portion approaches the center of the shelf.

When the shelf 6 is pulled out in this state, the guide body 19 on the one side member 7
When it hits, the rear part moves away from the center of the shelf,
On the contrary, since the front part tilts closer, the front part of the locking body 14 comes off the pedestal 18 and moves downward as the front part tilts.

Then, the shelf 6 is pulled out by a certain distance, and the rear stopper part 13 at the rear of the shelf is connected to the locking part 17 in the locking body 14.
When the shelf is aligned with the shelf, it can be engaged and locked to prevent the shelf from retreating.

When pushing in the shelf 6, if the pushing of the shelf is completed in the same manner as described above, it is possible to prevent the shelf from being pulled out.
In this way, the locking operation of the shelf can be performed after the shelf has been pulled out or pushed in by simply placing the front part of the locking body 14 on the cradle 18 in order to release the locking with the shelf before moving the shelf back and forth. This makes lock operation easier and prevents malfunctions.

What is shown in FIGS. 6 and 7 is a double drawer prevention mechanism for a multi-stage upper and lower shelf 6, in which one side member 7 provided with both stopper portions 12 and 13 in each shelf has the following features:
A front-rear longitudinal push-up body 20 with a height dimension (H) is provided along the front and rear midway positions, and the inner surface of the side frame 4 on which the locking body 14 is disposed is provided close to the outer surface of the locking body 14. A longitudinal rod 21 is provided to be vertically movable, and the vertical rod 21 is provided with a contact member 22 such as a roller shape that can come into contact with the upper surface of the push-up body 20 of the shelf 6 of each stage, and a stopper piece 23. will be established. Also, locking body 1 for each shelf location
The upper part 17a of the stepped locking part 17 at 4 is formed longitudinally in the front and back, and the lower part 17b is formed short, while the front stopper part 12 in each shelf is shaped like a longitudinal longitudinal groove into which the upper part 17a fits. The rear stopper portion 13 is formed in the shape of a short slot in the front and rear into which only the lower portion 17b fits.

On the upper surface of each locking body 14, an upper portion 17 of the stepped locking portion 17 of the locking body 14 is provided.
When a is locked to the front stopper part 12, it is located on the front side of the stopper piece 23, and when the locking body 14 is placed on the pedestal 18, and the lower part of the locking part 17 is 17b is the rear stopper part 13
A latch piece 24 is provided so as to be located on the rear side of the stopper piece 23 when it is to be locked to the stopper piece 23.

With this configuration, when all the shelves are pushed into the rack body 1 and the locking body 14 of the shelf 6 to be pulled out is placed on the holder 18 of the side frame 4, as shown by the dashed line in FIG. The locking body 1
The latch piece 24 at 4 is inclined so as to be located rearward than the stopper piece 23 at the vertical rod 21.

If you pull out the shelf in this state, the push-up body 2
0 pushes up the abutment 22 of the vertical rod 21 by the height dimension (H), and the stopper piece 23 at each shelf location rises by the height dimension (H) and locks with the front stopper part 12 of the shelf in the stored state. Since the stopper piece 23 is located behind the latch piece 24 of the locking body 14, the locking body 14 cannot be rotated upward (see FIG. 8), and therefore the shelf in the stored state cannot be pulled out. It is possible to prevent double drawers of the shelves and prevent the entire rack from falling due to shifting of the center of gravity to the front.

As shown in FIG. 9, when the lower locking portion 17b of the locking body 14 is fitted and locked in the rear stopper portion 13 of the shelf once pulled out, the latch piece 24 of the locking body 14 is in the raised position. It is located on the rear side of the stopper piece 23 of the vertical rod 21 to prevent the two from interfering with each other.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of the rack, Fig. 2 is a side view, Fig. 3 is a plan view taken along the - line in Fig. 2, and Fig. 4 is a plan view of the main part of Fig. 3. Figure 5 is a side view taken from the - line in Figure 4, Figure 6 is a side view of the main parts of the double drawer prevention mechanism, Figure 7 is a view taken from the - line in Figure 6, and Figure 8 is an explanation of the function. 9A and 9B are action explanatory diagrams showing the shelf drawer state. 1... Rack body, 4, 4... Side frame, 6...
Shelf, 7, 7... Side member, 8, 8... Rail, 12
...Front stopper part, 13...Rear stopper part,
14... Locking body, 15... Horizontal shaft, 16... Contact portion, 17... Locking portion, 18... Rest, 19...
Guide body, 20... thrusting body, 21... vertical rod,
22...Abutment, 23...Stopper body, 24...
Latch piece.

Claims (1)

[Scope of utility model registration request] A front stopper part and a rear stopper part are provided on one side member of the shelf supported between the left and right side frames of the rack main body so as to be movable back and forth, and a front stopper part and a rear stopper part are appropriately spaced apart along the moving direction of the shelf. The side frame adjacent to the shelf is provided with a locking member at a position above one side member of the shelf so as to be movable up and down and tiltable in a substantially horizontal direction perpendicular to the direction of movement of the shelf. A locking part that can be locked to the stopper part is formed at the lower end of the front of the body by downward movement of the front part, the front part of the locking body faces the front surface of the rack main body, and the inner surface of the side frame has the locking part that can be locked to the stopper part. A cradle is provided to support the front part of the locking body in an upward position, and one side member of the shelf is provided with a cradle that comes into contact with the rear part of the locking body as the shelf moves forward or backward, A locking device for a pull-out shelf in a rack, comprising a guide body for guiding the front part of the locking body to be removed from the cradle.