JPH0881058A - Depalletizer - Google Patents

Abstract

PURPOSE: To provide a depalletizer of high capacity that can pick up at a unit of one article. CONSTITUTION: A depalletizer is provided with a lifter for vertically moving stacked articles W, a stopper 5 for supporting the article W at the uppermost stage, a pickup body 4 for picking up the article W in cooperation with the stopper 5, and a pickup roller 14 built in the pickup body 4 and brought into contact with the article W to pick it up. The depalletizer is further provided with plural conveyor belts 13 forming a conveying path, and a belt pulley 11 with a clutch provided at a driving shaft 10 for driving the conveyor belts 13 so as to control the rotation of the conveyor belts 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a depalletizer for carrying out and sorting articles stored in a distribution center.

[0002]

2. Description of the Related Art Generally, articles are stacked in a plurality of stages on a pallet basis in a three-dimensional automatic warehouse in a distribution center, and the articles stacked in a plurality of stages are arranged in a plurality of rows and stored. A truck running on a track is provided on the entrance side of the three-dimensional automated warehouse, and the loaded articles are loaded on the truck in pallet units and conveyed to a depalletizer.

A conventional depalletizer is disclosed in, for example, Japanese Patent Laid-Open No. 57-57.
As described in JP-A-77123, the uppermost articles stacked on the pallet are gripped and transferred in plane units, and these are further conveyed individually by a conveyor route. In this type of depalletizer, the minimum unit is depalletizing per surface.

[0004]

However, in most cases, the required number of articles does not match the number of articles for one surface. Therefore, when sending out only the necessary articles, it is necessary to store the fractional articles by some method. In this case, a flow rack, a small stacker crane or the like is required as a storage place, and there is a problem that the equipment becomes large. When a request for leaving a large number of articles is issued, the articles are delivered from the depalletizer. Further, when a request for delivery of a small number of articles is issued, it is confirmed whether the required articles are in stock in the flow rack or stacker crane, and if they are in stock, they are delivered from these.
Therefore, the conveyor line for joining and branching the articles discharged from each of the debaretizer, the flow rack, the stacker crane, etc. becomes very complicated, and the information and control method become complicated. It is an object of the present invention to provide a depalletizer which does not require a storage place for a fractional number of articles and can pick even a quantity of one article at a high speed.

[0005]

The above object of the present invention is to provide a lifter for moving a loaded article up and down, a stopper for supporting the uppermost article of the loaded articles from the rear in the transport direction, and a stopper for this stopper. A pickup main body that is self-propelled in a direction of approaching and separating and picks up the article in cooperation with a stopper, a pickup roller that is built in the pickup body and that contacts the article and conveys the article, and an axis line of the pickup roller. By a depalletizer characterized by comprising a plurality of conveyor belts stretched in a direction perpendicular to the direction and a clutch pulley provided on the drive shaft of the conveyor belts and controlling the rotation of the conveyor belts. To be achieved.

[0006]

According to the depalletizer of the present invention constructed as described above, the stopper is placed on one side of the loaded uppermost article, and the pickup body is pressed against the article from the opposite side of the stopper. By this pressing on the pickup body side, the article is loaded on the pickup roller, the article rolls over the pickup roller by the rotation of the pickup roller and is guided to the conveyor belt.The following conveys the article through the pickup belt to the next route. Be transported. If only a certain number of articles guided on the conveyor belt is required, the conveyor belt in the range where unnecessary articles are placed is the conveyor belt that is rotated in the opposite direction by the belt car with the clutch stopping its rotation. The upper unwanted articles are returned to the pallet. Thereafter, the pickup body can be moved to the stopper side and the pickup roller can be pressed against the next article to continue the pickup operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. In FIG. 2, the depalletizer 1 is engaged with a frame structure 2 formed at a predetermined height and guide members 3 and 3 on both sides of the frame structure 2 provided in the longitudinal direction, and the depalletizer 1 is in the direction of arrow A in FIG. A self-propelled pickup main body 4, a stopper 5 provided at one end of the frame structure 2, a vertically movable lifter 6 provided below the stopper 5 and the pickup main body 4 And an apron roller conveyor 20 that is constructed by being rotatably provided on the chain 7 and is erected along the guide member 3 and is locked to the apron roller conveyor 20. The frame structure 2 has a frame structure formed by combining, for example, angles and square tube members, and the guide members 3 and 3 use C channel members having concave portions on their inner side surfaces. Wheels (not shown) provided on both outer sides of the pickup body 4 are engaged with the inner side surfaces of the guide members 3 and 3, and a frame structure is provided by a drive motor (see FIG. 1) M provided in the pickup body 4. It is designed to be self-propelled in the longitudinal direction of the body 2.

A stopper 5 is provided at one end of the frame structure 2. The stopper 5 is a stopper having an inner side surface inclined obliquely upward, and is moved by the cylinder 9 so as to slightly project toward the inner side of the frame structure 2. The lower edge of the moved stopper 5 is adapted to the lower side of the uppermost article W loaded on the pallet on the lifter 6. The lifter 6 is a platform that moves in the vertical direction (arrow B) by a pantograph and a cylinder, and is configured to be moved stepwise according to the height direction of the articles W to be loaded. Therefore, the lower side of the uppermost stage of the loaded articles W is made to coincide with the lower edge of the stopper 5.

On the front side of the pickup body 4, there is provided a conveying roller 8 which is movable in the direction A through a chain 7 and rotatably mounted on the two chains 7 and 7, and an apron roller conveyor 20. Is configured. This apron roller conveyor 20 has the guide members 3, 3
And a guide surface 3, 3
Is hung downward from the left end of the. As the pickup body 4 moves, it can be expanded and contracted so as to cover the upper surface of the frame structure 2. Further, each of the transport rollers 8 is rotated in the same direction via a belt (not shown) to transport the article W sent to the transport rollers 8 forward.

The pickup body 4 is, as shown in FIG.
A drive shaft 10 is provided on the side where the apron roller conveyor 20 is provided, and a drive motor M is provided on the drive shaft 10. The drive shaft 10 is provided with a plurality of large-diameter clutch pulleys 11 having a built-in clutch. These belt wheels with a clutch 11 rotate when the clutch is ON, and only the drive shaft 10 rotates when the clutch is OFF.

A driven belt wheel 12 of small diameter corresponding to the belt wheel with clutch 11 is rotatably provided in the rear of the pickup body 4, and the belt wheel with clutch 11 is provided.
Between the driven belt wheel 12 and the driven belt wheel 12, respectively.
3 is wound. The diameter of the clutch-equipped belt wheel 11 is larger than that of the driven belt wheel 12, and the conveyor belt 13
The upper surface side of the is wound obliquely. The transport surface of the apron roller conveyor 20 is aligned with the top surface of the belt wheel 11 with a large diameter clutch, so that the article W transported on the transport belt 13 can be smoothly transported to the transport roller 8. It has become.

A pickup roller 14 is provided on the rear side of the side on which the driven belt wheel 12 is provided, via a chain sprocket 15 and a chain 16 provided at the end of the drive shaft 10. The pickup roller 14 is formed of a small-diameter cylindrical body and is divided into a plurality of pieces.
These pickup rollers 14 are designed to rotate simultaneously in the same direction as the drive shaft 10. In addition, the conveyance roller 8 provided on the front side of the pickup body 4 also
The drive shaft 10 and the transmission 17 are interlocked by a belt to rotate in the same direction as the clutch-equipped belt wheel 11.

An accumulated conveyor 1 for conveying an article W is provided ahead of the apron roller conveyor 20.
8 is provided, and the pallets sorted and carried out by the depalletizer 1 are carried to a predetermined route by the accumulation conveyor 18.

The operation of the depalletizer 1 described above will be described below with reference to FIGS. In FIG. 3, the uppermost stage of the articles W loaded on the lifter 6 is aligned with the carry-in position. When the cylinder 9 is operated in this state, the stopper 5 contacts the right side of the uppermost article W.

At this time, the pickup body 4 is on the guide member 3 of the depalletizer 1 and is in a standby state. Next, as shown in FIG. 4, when the drive motor M in the pickup body 4 is operated to move the pickup body 4 to the stopper 5, the already rotating pickup roller 14 contacts the left end of the article W. They come into contact with each other and cooperate with the inclined surface of the stopper 5 to enter the lower side of the leading article W and move the article W onto the conveyor belt 13 as the pickup body 4 moves to the right. Then, the front article W is carried out onto the carrying roller 8 of the apron roller conveyor 20 by the rotation of the clutch-equipped belt wheel 11.

As shown in FIG. 5, the second row of articles W on the lifter 6 and the third row of articles W are successively carried out as the pickup body 4 moves to the stopper 5 side. You can When the uppermost article W is unloaded, the pickup body 4 returns to the position shown in FIG. 3 and prepares for the positioning of the second article W by the lifter 6. Thereafter, the same process is repeated, and the required final row is the conveyor belt 1.
When the sheet is placed on No. 3, the rightmost pickup roller 14 and the conveyor belt 13 stop rotating.

In the above-mentioned operation, the loaded article W is placed.
If there is an unnecessary article W inside, a belt wheel with a clutch 11 that drives a conveyor belt 13 on which the unnecessary article W is placed.
Will be stopped immediately. Then, as shown in FIG. 6, only the conveyor belts 13 in the other rows are rotated to feed the article W onto the apron roller conveyor 20, and the clutch belt wheel 11 on which the unnecessary article W is placed is reversely rotated to remove the article W. Unload it to the lifter 6 side and return it to the original position. At this time, the pick-up body 4 can place the article W on the lifter 6 at a position different from the initial position. A control device (not shown) that controls the drive of the conveyor belt 13 recognizes in advance whether the article W to be loaded is necessary or unnecessary. Then, all the articles W facing the pickup body 4 are once placed on the conveyor belt 13, but the unnecessary articles W are then returned to their original positions.

In the above description, the apron roller conveyor 20 connected and interlocked with the pickup body 4 is connected.
Can be handled in the same way even with a normal roller conveyor.

[0019]

As described above, in the depalletizer of the present invention, the stopper having an inclined surface supports the group of articles on the lifter from the rear, and the pickup main body that reciprocates left and right on the frame is pressed against the stopper. Since an article can be placed on the conveyor belt via the pickup roller and carried out to the conveyor path side, and unnecessary articles can be detected and returned to the lifter side, an automatic depalletizer that can supply only the necessary articles to the conveyor route. Can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a pickup main body of a depalletizer showing an embodiment of the present invention.

2 is an external perspective view of a depalletizer using the pickup body of FIG.

FIG. 3 is a side view of the depalletizer of FIG. 2 at an initial stage of operation.

FIG. 4 is a side view of the depalletizer of FIG. 2 in operation.

5 is a side view of the depalletizer of FIG. 2 at the end of operation.

FIG. 6 is an operation side view when returning an unnecessary article in the depalletizer of FIG. 2.

[Explanation of symbols]

 1 Depalletizer 4 Pickup Main Body 5 Stopper 6 Lifter 10 Drive Shaft 11 Belt Car with Clutch 13 Conveyor Belt 14 Pickup Roller

Claims (1)

[Claims] 1. A lifter (6) for moving a loaded article (W) up and down, and a stopper (5) for supporting the uppermost article (W) among the loaded articles (W) from the rear in the transport direction.
And self-propelled in the direction of approaching and separating from this stopper (5),
A pickup body (4) for picking up the article (W) in cooperation with a stopper (5), and an article (W) which is built in the pickup body (4) and abuts on the article (W) to convey the article (W). Provided on a pickup roller (14), a plurality of conveyor belts (13) stretched in a direction perpendicular to the axial direction of the pickup roller (14), and a drive shaft (10) of the conveyor belt (13). Belt car with clutch (1) that controls the rotation of the conveyor belt (13)
1) The depalletizer (1), characterized by comprising: