JPH0367805A - Pallet transfer device - Google Patents

Abstract

PURPOSE:To securely carry out the taking in and out of a pallet in the above automatic warehouse by providing brackets capable of being moved toward a storing rack to an elevating body capable of being elevated or lowered along the storing rack and providing an endless chain having a recessed part capable of being engaged with the pallet to each of the brackets, and also by providing engaging hooks to the pallet. CONSTITUTION:In an elevating body 11, front and rear brackets 63, 64 capable of being moved forward or rearward to or from a storing rack along a pair of right and left linear rails 62, 62, and a movable plate 65 are provided, and an endless chain 71 is wound around sprockets 68, 69 provided to the front and rear brackets 63, 64. In this chain 71, a hook-engaging recessed part 96 is formed. On the other hand, hooks 50, 51 are formed on the front and rear lateral members 46, 46 of a pallet 34 so as to be capable of being engaged with the engaging recessed part 96 of the chain in the elevating body 11. In this constitution, by driving the brackets and the chain, the hook on the pallet side and the recessed part on the chain side can be engaged with each other for performing the taking in and out of the pallet, thus the taking in and out can be securely carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pallet transfer device that pushes a pallet on which a load such as a board is placed into a storage shelf and pulls it out.

[Conventional technology]

Special Publication No. 59-35804 and Utility Model Publication No. 80-7240
As shown in Publication No. 4, a retaining member that can be freely engaged with and detached from the pallet is movably provided on the elevating body along the storage shelf, and the pallet is stored by engaging and moving the engaging member with the pallet. A device that is pushed into a shelf and pulled out is known.

[Problem to be solved by the invention]

With such a device, the holding member reciprocates with respect to the lifting body to pull the pallet into or push it out, so the pallet can only be pushed into and pulled out of the storage shelf provided on one side of the device. Moreover, since the engaging member is actuated between the engaged state and the disengaged state, the operation becomes uncertain and the pallet may not be reliably pulled out or pushed in.

Therefore, an object of the present invention is to provide a pallet transfer device that can solve the above-mentioned problems.

[Means and effects for solving the problem] An endless chain is movably and rotatably provided on the elevating body, and hooks and hook engaging recesses are provided on the pallet stored in the storage body and the endless chain. After moving the chain, move upward and engage the hook engaging recess with the hook and rotate to pull the pallet into the lifting body, or push out the pallet on the endless chain by operating in the opposite direction as described above. It is designed so that it can be pushed into a storage shelf.

〔Example〕

As shown in FIGS. 10, 11, and 12, an automatic warehouse for plate materials is composed of storage shelves A and loading and unloading racks B.

The storage shelf A is provided with front and rear one side vertical columns 2, 2 and front and rear other side vertical columns 3°3 on the left and right of the front and rear intermediate vertical columns 1, 1, and both sides of the front and rear intermediate vertical columns 1, 1. Between and front and rear vertical pillars 2, 2
A plurality of pallet guide rails 4 are hung horizontally at intervals in the vertical direction between the other side and between one side of the front and other side vertical columns 3, 3, and the pallet guide rails 4 are straddled between adjacent pallet guide rails 4. A traveling guide rail 5 is installed horizontally between the upper portions of each vertical column.

The loading/unloading device B consists of a main body frame 10, an elevating body 11, and a transfer device 12, and the main body frame 10 is connected to a lower frame 1.
3 and the upper frame 14 as a pair of left and right vertical frames 15.15
A driving wheel 16 and a driven wheel 17 provided on the lower frame 13 are connected to each other by a running rail 18 laid along the storage shelf A.
By driving the drive wheels 16 with the travel motor 19, the entire drawer device B can be moved left and right along the storage shelf A, and the elevating body 11 is mounted on the left and right frames 20 and 21.
The planar shape becomes a square frame with the front and rear frames 22°23,
A pair of front and rear guide rollers 25 are provided on the mounting members 24 provided on the left and right frames 20 and 21, respectively, and the guide rollers 25 are placed in contact with the front and rear surfaces of the vertical frame 15 so that the elevating body 11
can be raised and lowered along the vertical frame 15, and a lifting device 26 is provided between the lifting body 11 and the main body frame 10.

The lifting device 26 includes a movable sprocket 27 provided on the mounting member 24 and a fixed sprocket 28 provided on the upper frame 14.
, a driving sprocket 1, etc. driven by a lift motor 29 via a reducer 30, and a pair of chains 32.
is connected to the upper frame 14 to form a movable sprocket 27, a fixed sprocket 29, a driving sprocket 31, and an elevating body 1.
The sprocket 31 is connected to the lower frame 13 via the sprocket 33 provided in the
By rotating forward and backward, the elevating body 11 is raised and lowered.

Note that an upper guide member 33 that moves along the running guide rail 5 is provided on the upper frame 14 of the main body frame 10 to guide the main body frame 10 so as not to swing during running.

The transfer device 12 stores and pulls out a special pallet 34 for placing plate materials in the storage shelf A, and a plate material 35 is placed on the special pallet 34 via a lumber 36 and a skid 37. and the plate material 3 is moved by the load positioning rod 38.
5, and the pallet 34 is moved by a pair of left and right rollers 39.
It is equipped with

Next, details of each part will be explained.

As shown in FIGS. 8 and 9, the pallet guide rail 4 has a long rail 42 and a short rail 43 provided at intervals in the longitudinal direction on a horizontal piece 41 of an L-shaped rail body 40. , roller guide surface 4a of pallet guide rail 4
has a recess 4 into which the roller 39 of the pallet 34 is recessed.
4 is formed, and the rail main body 40 is reinforced with a reinforcing material 45.

As shown in FIGS. 8 and 9, the pallet 34 is connected in a lattice shape by a plurality of horizontal members 46 and connecting members 47, and a pair of front and rear connecting members 48 are connected to the U-shaped end connecting members 48 at both left and right ends. rollers 39, 39 and a pair of front and rear side rollers 49, 49 are provided, and a pair of left and right front hooks 50 and a rear hook 51 are provided on the lower surface of the front and rear cross members 46, 46 to protrude downward. A stopper piece 52 is provided at a rear position on the lower surface of the pallet 34, and the pallet 34 is moved into the storage shelf A by the rollers 39 provided on the left and right rolling along the roller guide surfaces 4a of the left and right pallet guide rails 4. When the pallet 4 is stored or pulled out, and the pallet 4 is stored in the storage shelf A, the rear roller 39 fits into the recess 44 and is positioned, and the pallet 34
is held so that it does not move from the storage shelf A due to vibrations, etc., and if for some reason the roller 39 attempts to climb over the recess 44 and move outward from the storage shelf A, the stopper piece 52 moves from the vertical surface of the recess 44, In other words, the pallet 34 comes into contact with the end surface 43a of the short rail 43 to prevent the pallet 34 from moving outward any further.

The transfer device is constructed as shown in FIGS. 1 to 5.

In other words, the front and rear frames 22 and 23 that constitute the elevating body 11
A pair of left and right connecting plates 60 are horizontally suspended between them, a flat beam 61 is mounted on the connecting plate 60, and a pair of left and right linear rails 62, 62 are provided on the beam 61 in parallel in the front-rear direction. At the same time, a front bracket 63, a rear bracket 64, and a movable plate 65 are provided along the linear rails 62, 62 so as to be movable back and forth via a linear bearing 66, and the front bracket 63, rear bracket 64, and movable plate 65 A chain guide 67 is provided over the area, a driven sprocket 68 is supported on the front bracket 63, and a drive shaft 70 having six drive sprockets is supported on the rear bracket 64. An endless chain 71 is wound around the driven sprocket 68 and the driven sprocket 68.

The left and right movable plates 65, 65 are integrally connected by a connecting beam 72, and the output side of a chain drive motor 73 provided on the lower surface of this connecting beam 72 is connected to a reducer 74, a torque limiter 75, and a chain transmission mechanism 76. A pair of left and right sprockets 7 are connected to the rotating shaft 77 through the rotating shaft 77.
Each sprocket 78 is connected to a sprocket 80 provided on the drive shaft 70 via a drive chain 79, and when the chain drive motor 73 is driven, the left and right endless chains 71 rotate synchronously. It's like driving.

A nut member 81 is provided on each of the left and right movable plates 65, and this nut member 81 connects the beam 61 and the connecting plate 60.
They protrude downward from long holes 61a and 60a formed in the longitudinal direction, and are screwed into feed screw rods 82, respectively.

A chain shift motor 84 is provided on a vertical plate 83 provided on the lower surface of one of the connecting plates 60, and its output side is connected to a rotating shaft 86 via a transmission mechanism 85 using a timing belt. are connected to the input sides of transmission mechanisms 87 provided on the left and right connecting plates 60, respectively, and the transmission mechanisms 8
The output side of 7 is out of phase by 90 degrees with respect to the input end, and the feed screw rod 82 is connected to the output side, and when the chain shift motor 84 is driven, the left and right feed screw rods 82 are synchronized and corrected. It rotates in the opposite direction, thereby causing the left and right endless chains 71 to move forward and backward in synchronization.

A pallet support roller 88 is provided on each of the front bracket 63 and the rear bracket 64, and the pallet support roller 88 projects slightly upward from the upper surface of the endless chase 1.

As shown in FIGS. 6 and 7, the endless chain 71 connects a pair of links 90 and 90 to a pin 9 through a roller 91.
It is a multi-row roller chain in which four rows of single-row endless chains 93 are connected in two rows, and the central two rows of single-row endless chains 93.
At this point, a plurality of links 90 and rollers 91 are removed to form a space 94, and a pair of long rollers 95 are attached to the space 94 with a pin 92 to form a pair of hook engaging recesses 96. The distance between the pair of hook engaging recesses 96, 96 is equal to the distance between the front and rear hooks 50, 51 provided on the pallet 34 and the distance between them.

Next, the operation of pulling out the plate material 35 from the storage shelf A and picking it up will be explained.

(2) The plate material 35 is placed on a pallet 34, and is stored in the storage shelf A with the rollers 39 of the pallet 34 placed on the pair of pallet guides 4, 4 of the storage shelf A.

At this time, the rear roller 39 fits into the recess 44 formed in the roller guide surface 4a of the pallet guide rail 4, and
It is positioned and stored in a predetermined position.

■ The main body frame 10 of the loading/unloading device B is connected to the running rail 18.
At the same time, the lifting body 11 is raised and lowered to face the pallet 34 from which the transfer device 12 is pulled out as shown in FIG. In other words, the upper surface of the endless chain 71 of the transfer device 12 is connected to the front and rear hooks 50° 51 of the pallet 34.
Position it downward by a distance that does not interfere with the

■ Drive the chain shift motor 84 of the transfer device 12 to move the left and right endless chains 71 forward toward the storage shelf A, and move the endless chains 7 as shown in FIG. 13(b).
1 hook engagement recess 96 to the rear hook 51 of the pallet 34.
The position should be directly below.

■ Raise the elevating body 11 of the loading/unloading device B to move the loading/unloading device 12
The pallet supporting roller 88 is brought into contact with the lower surface of the pallet 34, and as shown in FIG.
is removed from the recess 44 of the pallet guide rail 4, and the hook engaging recess 96 is fitted into the rear hook 51 of the pallet 34.

■ Drive the chain drive motor 13 of the transfer device 12 to drive the endless chain 71 in the direction of the arrow to move the pallet 3
4 from the storage shelf A via the rear hook 51.

At this time, the rear hook 51 comes into contact with the long roller 95 of the hook engaging recess 96 of the endless chain 71, and the pallet 34 is moved so that one roller 39 is moved along the roller guide surface 4a of the pair of pallet guide rails 4. Since it rolls, the pallet 34 can be smoothly pulled out from the storage shelf A by driving the endless chain 71 with a light force.

■ When the pallet 34 is pulled out by approximately half with the endless chain 71, the chain shift motor 84 of the transfer device 12 is driven in the opposite direction to that described above to move the endless chain 71 backward and onto the elevating body 11. Rotate the endless chain 71 while returning it to the first
As shown in Figure 3(d), the pallet 34 is connected to an endless chain 71.
It is placed on top and supported on the elevating body 11 of the loading/unloading device B to pick up the cargo.

At this time, the front and rear hooks 50.51 of the pallet 34 fit into the pair of hook engaging recesses 96.96 of the endless chain 71, and are supported so as not to move back and forth and left and right.

Next, the pallet 34 supported by the elevating body 11 is placed on the storage shelf A.
Explain the operation of pushing the cargo into the container and placing it there.

(2) As shown in FIG. 14(a), the elevating body 11 is raised and lowered to face the pallet guide rail 4 on which the pallet 34 is placed.

■ Drive the chain drive motor 73 of the transfer device 12 to rotate the endless chain 71 in the opposite direction to the first
4. Push the pallet 34 onto the pallet guide rail 4 of the storage shelf A via the roller 39 as shown in FIG. 4(b).

2 ■ After pushing the pallet 34 in to a certain extent, drive the chain shift motor 84 to move the endless chain 71 to the 14th position.
The pallet 34 is moved forward toward the storage shelf A as shown in Figure (c), and the pallet 34 is completely pushed onto the pallet guide rail 4.

■ Lower the elevating body 11 and move the endless chain 71 to the 14th
It is lowered as shown in Figure (d) to disengage the hook engaging recess 96 from the rear hook 51, and at the same time, the roller 39 is dropped into the recess 44 of the roller guide surface 4a.

■ Drive the chain shift motor 84 of the transfer device 12 to move the endless chain 71 backward away from the storage shelf A, and move the endless chain 71 as shown in FIG. 14(e).
1 is returned onto the elevating body 11, and the endless chain 71 is rotated to bring the pair of hook engaging recesses 96 into predetermined positions.

In the above embodiment, the transfer device 12 is an endless chain 71.
The hook engaging recess 96 of the pallet 34 is engaged with the hook of the pallet 34 to push the pallet 34 along the pair of pallet guide rails 4, 4 in the storage shelf A and pull it out. A hook may be provided so as to be movable toward the storage shelf, and the engaging hook may be engaged with the pallet and detached from the pallet to be pushed into the storage shelf or pulled out.

〔Effect of the invention〕

By moving the bracket relative to the elevating body 11, the endless chain 71 is exposed to the inside of the storage shelf and the hook engaging recess 96 is moved.
to face the hook, move the elevating body 11 upward, engage the hook engaging recess 96 with the hook, and open the endless chain 71.
By rotating the pallet 34, the pallet 34 can be pulled onto the elevating body 11 and loaded, and by operating in the opposite direction to the above, the pallet 34 can be pulled onto the elevating body 11.
The pallet 34 on top can be pushed out and stored on the storage shelf.

Therefore, by moving the endless chain 71 to the opposite side and rotating it in the opposite direction, it is possible to push the pallet into the storage shelves provided on both sides and pull it out to store and pick up the cargo.

In addition, the endless chain 71 is moved up and down together with the elevating body 11 to engage the hook engaging recess 96 with the hook,
Since the lever separates, its operation becomes reliable and the pallet can be pulled out and pushed in securely.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the transfer device, FIG. 2 is a plan view, FIG. 3 is a side view, FIG. 4 is a front view, and FIG. 6 and 7 are a plan view and a side view of the endless chain, FIG. 8 is a perspective view of the storage shelf and pallet, and FIG. 9 is a side view of the pallet in the stored state.
Figures 10, 11, and 12 are front views, side views, and cross-sectional views of the automated warehouse, Figures 13 (a) to (d) are explanatory diagrams of the loading operation, and Figures 14 (a) to ( e) is an explanatory diagram of the loading operation. A is a storage shelf, 11 is an elevating body, 34 is a pallet, 71 is an endless chain, and 96 is a hook engaging recess. 5 6 Symbol Hei 3 678υb (15) Unexamined Japanese Patent Publication No. 3 67805 (17) Unexamined Publication Hei 3 67805 (18)

Claims (1)

[Claims] A bracket is provided on the elevating body 11 that moves up and down along the storage shelf so as to be movable toward the storage shelf, and an endless chain 71 having a hook engagement recess 96 is rotatably provided on the bracket. A pallet transfer device characterized in that the pallet 34 stored in the storage shelf is provided with a hook facing downward.