JPS63267615A - Pallet separating device - Google Patents

Abstract

PURPOSE:To make it possible to eliminate the necessity of a pawl drive means so as to simplify the constitution of a pallet separating device by rotating a reciprocatable and rotatable L-like pawl in association with the vertical motion of a lifter so that the pawl is released from its supported condition during elevation of the lifter while it is supported during lowering of the same. CONSTITUTION:When a lifter 3 is lowered in such a condition that pallets 1a, 1b are supported by the lifter 3, the lowermost pallet 1a presses one side 8c of a pawl 8 which is therefore turned clockwise so that a side 8b enters into between the upper and lower plates 1b1, 1b2. Accordingly, the pawl 8 abuts against a stopper 10 while a side 8a is held horizontally so that the side 8b supports the pallet 1b. As a result, the pallet 1a is separated and is shifted onto a conveyer 2. When the lifter 3 is again elevated, the pawl 7 is rotated reversely so that the side 8c is returned so as to support the lower side of the pallet 1b. With this arrangement it is possible to a eliminate the necessity of a pawl drive means, thereby it is possible to simplify the constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a pallet separating device that separates loaded pallets and supplies them to a conveyor.

(Prior Art) Palletizing work that has been commonly performed will be described with reference to the plan view shown in FIG. 6. Reference numeral 1 denotes pallets stacked on a conveyor 2, with both sides open in the direction of travel.

This pallet 1 is separated one by one from the bottom by separating devices 4, 4 arranged on both sides of the conveyor 2, and then conveyed to the conveyor 2.
and sent to the downstream palletizing process. In this palletizing process, the robot 5 arranges the workpieces 6 on the pallet 1 and sends them to the next process.

In such a palletizing process, a device as shown in FIGS. 7 and 8 has conventionally been used to separate stacked pallets. That is, a lifter 3 is disposed on the inner extension 1 of the roller conveyors 2, 2, and separation devices 4, 4 are disposed on the outer side.

Here, the lifter 3 has a lifting surface 3c attached to a base 3a via a link 3b, and an air cylinder 3d swingably attached to the base 3a causes the link 3b to expand and contract.
Move the lifting surface 3C up and down.

Further, the separation devices 4, 4 are disposed opposite to each other with the conveyor 2 in between, and claws 4a that support the pallet 1 on the conveyor 2.
They each have This pawl 4a is rotationally driven by a motor 4d via gears 4b and 4c so that it can be retracted from above the conveyor 2 when the pallet 1 is not supported.

(Problems to be Solved by the Invention) However, in the above-described configuration, for example, when the pallet 1b is supported by the claws 4a, the amount of movement of the air cylinder is controlled to support the upper plate 1b of the pallet.

The claw 4a must be inserted between the lower plate 1b2 and the lower plate 1b2. Further, a drive source such as a motor is required to operate the pawl 4a, resulting in a large and expensive device.

Therefore, it is an object of the present invention to provide a pallet separating device capable of separating pallets only by the operation of a lifter without having a drive source for driving claws for supporting pallets.

[Structure of the Invention] (Means for Solving the Problems) That is, the present invention includes a lifter disposed within a conveyor for lifting a pallet loaded on the upper part of the conveyor, and a lifter disposed on both sides of the conveyor for lifting a pallet loaded on the upper part of the conveyor. The separator comprises a reciprocating L-shaped claw that normally supports the bottom layer of the pallet by one side and pivots upward to release this support when the pallet is lifted by the lifter. , when the pallet is lowered by the lifter, the pallet comes into contact with the other side of the pawl, causing the pawl to rotate, and the second side from the bottom of the stacked pallets is supported. do.

(Function) According to the above-described configuration, simply by moving the lifter up and down, the pallet pushes the claw of the separation device and rotates back and forth, and one side of the claw that supports the pallet supports the stacked barrettes. are sequentially moved from the bottom to the top, so the pallets are sequentially separated from the bottom and sent onto the conveyor.

(Example) The present invention will be described below with reference to an example shown in FIGS. 1 and 2. Figure 1 is a front sectional view of the pallet separating device.
FIG. 2 is a partial plan view of FIG. 1. As shown in the figure, the arrangement of this embodiment is similar to the conventional example, with the roller conveyor 2
．． A lifter 3 is arranged inside the 2, and a separation device 7 is installed on both outsides.
, 7 are arranged. Here, since the conveyor 2 and lifter 3 are the same as those in the conventional example, the separation device 7 will be explained in detail below.

The separating devices 7, 7 are disposed opposite to each other with the conveyor 2 in between, and each has a claw 8 for supporting the pallet 1 on the conveyor 2. The claws 8 have an L-shape, and as shown in FIG. 2, a set of claws connected by a connecting rod 8d at a bent portion 8a is disposed in each separation device, and rotates back and forth around the bent portion 8a. It is installed so that it can be moved. One side of the claw 8 that supports the pallet is 8b, and the other side is 8b. c.
Then, the length of each is long enough to support the pallet when it is placed horizontally, and - the side 8b is such that the bottom pallet (la) is in contact with the other side 8C of the nail, as shown in Figure 1. When the claw 8 rotates, the upper plate 1b of the pallet 1b one above
1 and the lower plate 1b2.

A weight 9 is attached to the claw 8 so that this posture is maintained when the negative side 8b faces upward as the pallet 1 rises, and a stopper 10 is provided to support the weight 9. When the pallet is supported by one side 8b of the pawl 8, the other side 8c comes into contact with the stopper 10 to restrict the rotation of the pawl 8 and keep the negative side 8b horizontal.

The operation of the apparatus having the configuration described above will be explained below with reference to FIGS. 3 to 5. Although only two pallets are shown in the drawing, if there are three or more pallets, the same operation will be repeated. First of all, Figure 3 shows palette la,
lb is lifted by the lifter 3, and when the lid 3 is gradually lowered from this state, the lower end of the pallet 1a pushes down the other side 8c of the claw 8, and the claw 8 rotates clockwise in the figure. At this time, one side 8b of the claw 8 is attached to the pallet 1 as shown in FIG.
It gets into between the upper plate 1b and the lower plate 1b2 of b.

When the lifter 3 is further lowered, one side 8b of the claw 8 supports the upper pallet 1b while being held horizontally.
The lower pallet 1a remains on the lid 3 and is supplied onto the roller conveyor 2. After the pallet 1a is transferred on the roller conveyor 2, when the lifter 3 is raised again, the lower plate 1b2 of the pallet 1b pushes up one side 8b of the claw 8, returning to the state shown in FIG.

According to the embodiment described above, the pallet 1 can be separated from the roller conveyor 1 by only the vertical movement of the lifter 3 without having a drive source for driving the claws 8 for supporting the pallet 1.
It is now possible to supply above.

In the embodiment described above, two claws 8 are connected to each other by a connecting rod 8d for each separation device, but the same effect can be obtained with one claw by making the width of the claw 8 wider. It will be done.

[Effects of the Invention] As explained above, according to the present invention, an L-shaped claw for supporting a pallet by reciprocating rotation is attached to the separating device,
This pawl is pushed by the pallet that is moved up and down by the lifter and rotates to support the pallet above in order, so the pallets are separated and fed onto the conveyor without a drive source to drive the pawl. It became possible.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention, FIG. 1 is a front sectional view, FIG. 2 is a partial plan view of the main part, and FIGS. 3 to 5 are operation explanatory diagrams, FIG. 6 is a plan view for explaining the palletizing work, FIG. 7 is a diagram corresponding to FIG. 1 of the conventional example, and FIG. 8 is a diagram equivalent to FIG. 2 of the conventional example. 1...Pallet, 2...Roller conveyor, 3...
・Lifter, 7... Separation device, 8... Claw, 9.
...Weight, 10...stopper. Agent Patent Attorney Nobuaki Chika Ken Daikomaru Figure 1

Claims (1)

[Claims] It consists of a lifter disposed inside the conveyor to lift the pallets loaded on the top of the conveyor, and a separation device disposed on both sides of the conveyor and having L-shaped claws that reciprocate at the top, and the claws are constantly supports the lowest layer of the pallet on one side, and when the pallet is lifted up by the lifter, swings upward to release this support, and when the pallet is lowered by the lifter, the pallet rests against the other side of the claw. A pallet separating device characterized in that the claws are pivoted in contact with each other so that one end supports the second one from the bottom of the stacked pallets.