JPH08217250A - Stacking and unstacking device - Google Patents

Abstract

PURPOSE: To allow one stacking/unstacking device to stack and unstack boxes of many sorts. CONSTITUTION: The height of a box 1 fed is sensed by a sensor 11, and a drive motor 10 and a holding pawl level adjusting mechanism 8 are actuated to vary the level of a holding pawl 7, and the second elevating/sinking distance C among two-step elevation and sinking of an elevating table 2 is set equal to the height of the box 1, and when the box lis elevated by the table 3 for the second distance C, the box 1 is laid under other boxes, and the holding pawl 7 is engaged by a detention recess 13 so that the box 1 is held.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacking and stacking device for automatically stacking and taking out boxes containing products, parts and the like in factories, warehouses and the like.

[0002]

2. Description of the Related Art In recent years, with the automation of physical distribution in factories and warehouses, the introduction of devices for storing and carrying parts and products in a box is increasing. In order to reduce the storage space, the boxes are stacked in two or more steps.

An apparatus for stacking boxes or stacking stacked boxes as described above is shown in FIG. This stacking and stacking device includes a roller 17 that conveys the box 16 and an elevating table 18 that moves up and down between the rollers 17 at a constant height.
And a motor 19 which is a drive source of the lift 18 and a motor 1.
It is composed of rotating members 20 and 21 for transmitting the power of 9 and a pair of holding claws 24 which are held by a holding member 22 at a constant height and whose protrusion is controlled by a cylinder 23.

In the above structure, in the case of stacking, the box 16 conveyed by the roller 17 is detected and the motor 19 is driven to drive the motor 19 so that the base is screwed into the rotating member 21 made of a screw rod. 18 rises. Since the lift 18 is located below the box 16, the box 16 is lifted by raising it to a certain height, that is, the engaging recess 25 of the box 16.
When the carriage comes to the position corresponding to the holding claw 24,
Stops rising. Then, the holding claw 24 projects by the operation of the cylinder 23 and engages with the engaging recess 25 of the box 16,
Hold. The lift 18 then moves down and waits for the next box. In this stacking, when the box 16 ′ is already held by the holding claw 24, the new box 16 rising from the bottom is superposed on the box 16 ′ held by the holding claw 24, and It will push up only one box. In this case, in the state where the upper surface of the raised box 16 abuts the lower surface of the upper box 16 ', the holding claws 24 are retracted to release the holding of the upper box 16'.

The boxes 16 thus sequentially sent are sequentially pushed up and held in a state of being stacked under the boxes, that is, they are automatically stacked. Further, in the case of the stepped dispersion, the holding claws 24 are retracted when the lifting table 18 is raised contrary to the above, and the lowermost box 16 held.
Is placed on the lift table 18, the lift table 18 is lowered, and the box 16 is placed on the roller 17 and conveyed. During the above operation,
When the lowermost box 16 is lowered by one box, the holding claw 2
4 again projects to engage the engaging recess 25 of the upper box 16 'and hold the upper box 16'.

As described above, the conventional stacking and stacking device shown in FIG. 3 automatically stacks and stacks boxes with a relatively simple structure and is effective for storing and sending out boxes. .

[0007]

In the above conventional stacking and stacking device, the height position of the holding claw 24 is a fixed position, and accordingly, the lifting distance of the lift 18 is constant.

By the way, there are various kinds of boxes handled in warehouses and the like, and boxes having different heights cannot be stacked or stacked by one stacking and stacking device. Therefore, as shown in FIG. 4, when there are a plurality of types of boxes to be handled, a plurality of stacks,
Distributors 26, 27, 28 are provided, for example, boxes sent from a conveyor 29 are stacked according to the type of the boxes, sent to the stackers to be stacked, and then spread out from the conveyor 30. I am trying. Therefore, there is a problem that a number of stacking devices and a stacking device corresponding to the type of box are required, the equipment cost is high, and a large installation space is required.

In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide a stacking device and a stacking device which can stack and stack a plurality of types of boxes by one unit and do not take up an installation space. .

[0010]

In order to achieve the above-mentioned object, the present invention is directed to an elevator for raising and lowering a box, a holding claw that can be engaged with a side portion of a lower portion of the box by insertion and withdrawal, and a box to be sent. Alternatively, it is provided with a detecting means for detecting the height of the lowermost box to be taken out, and a means for moving up and down the elevating table by two steps to the first distance and the second distance, and the height position of the holding claw is sent. The stacking and stacking device is configured to be variable according to the height of the box or the lowermost box to be taken out, and to control the second ascending / descending distance of the elevator so as to be equal to the height of the box.

[0011]

In the above structure, the height of the box that has been sent is detected, the height position of the holding claw is changed, and the second distance in the two-step elevation is made substantially equal to the height of the box. When the elevator is raised to the first distance, the upper part of the box on the elevator is
Hit the underside of the upper box, which is held by the holding claws. Next, when the lifting table is raised by the second distance, the box on the lifting table rises so that the engaging concave portion thereof is located at the position corresponding to the holding claw, and is held by the holding claw. The upper boxes will be stacked.

By repeating this operation, the boxes are sequentially stacked, but when boxes of different heights are sent, the height position of the holding claws is automatically changed, and the heights of the boxes are different. Boxes can be stacked in the same manner.

When the stacked boxes are taken out, the reverse operation is performed. That is, in the state in which the elevators are raised, the height of the lowermost part of the stacked boxes is detected and the height position of the holding claw is changed, and the second position in the two-stage ascent / descent is detected.
To be approximately equal to the height of the box. Second lift
When the box is lowered by a distance of, the upper box is also lowered, the engaging concave portion is in a position corresponding to the holding claw, and is held by the holding claw, and the lowermost box is independently moved by the first lowering of the lifting table. Taken out. By repeating this operation, the boxes are taken out in sequence, but when the boxes with different heights come to the bottom, the height position of the holding claw is automatically changed, and the boxes with different heights are also taken out. It will be.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A stacking and spreading apparatus according to an embodiment of the present invention will be described below with reference to FIG. The stacking and stacking apparatus according to the present embodiment includes a roller 2 that conveys a box 1, a lift table 3 that can be lifted and lowered by a roller 2, and a first cylinder 4 that lifts and lowers the lift table 3 by a first distance b. A second cylinder 5 for raising and lowering the elevating table 3 by a second distance C; holding claws 7 arranged in a pair on the left and right above the elevating table 3 and controlled to project by the third cylinder 6; 7, a holding claw height adjusting mechanism 8 including a screw rod screwed to a supporting member of No. 7, and a drive motor 10 for driving the holding claw height adjusting mechanism 8 via a transmission member 9.
A sensor 11 for detecting the height of a box connected to a controller (not shown) for controlling the driving of the cylinders 4, 5, 6 and the motor 10, and a sensor 31 for detecting a nail technician.
The holding claw 7 comprises a stopper 12 provided below the supporting member. The box 1 has engaging recesses 13 on both sides of the lower portion, and the engaging recesses 13 are open at the bottom.

The operation of the stacking and stacking device having the above structure will be described. This stacking and stacking device has a sufficient margin even if various boxes having different heights are positioned between the roller 2 part and the holding claw 7 part, and therefore the lift table 3 is moved in two steps. I try to do it.

First, in the stacking operation, the height of the box 1 conveyed on the roller 2 is detected by the sensor 11, the drive motor 10 is driven, and the holding claw height adjusting mechanism 8 is operated. The height of the holding claw 7 is adjusted so that the second distance C in the two-step lifting of the lifting table 3 is the same as the height of the box 1 sent.

At this time, the box 1'which was sent earlier
Is held by engaging the pair of holding claws 7 with the engaging recesses 13. Next, the first cylinder 4 operates to raise the elevating table 3 by the first distance b. Since the box 1 is pushed up by the elevating table 3 and the second distance C is previously adjusted to be equal to the height of the box 1, the upper surface of the box 1 abuts the lower surface of the upper box 1 '. In this state, the holding claw 7 is pulled in the direction of the arrow B to release the holding of the upper box 1 '.

Next, the second cylinder 5 is actuated and the lift 3 is raised by the second distance C, so that the box 1 pushes up the upper box 1'and holds the engaging recesses 13 on both sides of the lower part. Corresponds to 7. In addition, the second ascending / descending platform 3
The distance C is secured by the lifting table 3 hitting the stopper 12.

In this state, the holding claw 7 is projected by the third cylinder 6 and engages with the engaging recess 13 of the raised box 1 to hold the box 1. In this way, the boxes 1 are stacked. Then, the lift 3 descends to the position of the roller 2,
When the next box comes, the same operation as above is performed. At this time, if the height of the next box is different from the height of the previous box, the sensor 11 detects it as described above, and the position of the holding claw 7 is automatically adjusted. Therefore, this stacking and stacking device can stack sequentially in correspondence with different types of boxes sent.

Next, the stepwise operation will be described. This stacking operation is the reverse of the stacking operation, and when the lift table 3 rises to the uppermost position, the holding claws 7 are retracted in the B direction, which is the type of the lowermost box 1, that is, the height. Is detected and the position of the holding claw 7 is adjusted so that the second distance C matches the height of the box 1.

When the holding table 3 is lowered by the movement of the second cylinder 5 by the second distance C, the upper box 1'mounted on it is also lowered, where the holding claws 7 are placed on the upper box 1 '. The upper box 1'is held by engaging with the engaging recess 13 of the above.

The holding table 3 is lowered by the first cylinder 4 by the first distance b, and the lowermost box 1 is placed on the roller 2 and carried out. The elevating table 3 rises again, and by performing the above-described operations in sequence, various stacked boxes are sequentially delivered from the one below.

The stacking and stacking apparatus of this embodiment can stack and stack various boxes as described above. As shown in FIG. 2, one stacking and stacking apparatus 15 is provided on the conveyor 14. By combining and stacking various types of boxes, it is possible to reduce equipment costs.
Installation space can be reduced.

In the embodiment, the arrangement of the sensor 11 is not limited to the state shown in the drawing, but the arrangement of the sensor 11 on the upstream conveyor side of the present apparatus can start the movement of the claw during the transportation of the box. it can. Further, the stopper 12 may utilize a holding claw support member depending on the position of the engaging recess of the box. Further, the height position adjusting mechanism of the holding claw is not limited to the illustrated structure.

[0025]

As is clear from the description of the above embodiment,
The stacking and stacking device of the present invention includes a lift table for raising a box, a holding claw that can be engaged with and disengaged from an engaging recess formed in a lower part of the box, and a box that has been sent or a lowermost part to be taken out. It is provided with a detecting means for detecting the height of the box and a means for raising and lowering the elevating table by two steps to the first distance and the second distance. Since the second distance that is equal to the height of the box is made variable according to the height, even if boxes of different heights are mixed, the position of the holding claw is determined accordingly and the lifting table The second to go up and down
The distance is set so that various boxes can be smoothly stacked and stacked, which is useful from the viewpoint of reducing equipment cost and installation space.

[Brief description of drawings]

FIG. 1 is a front view of a stacking and stacking device according to an embodiment of the present invention.

FIG. 2 is a schematic view of a state in which a stacking device and a stacking device are combined with a conveyor.

FIG. 3 is a front view of a conventional stacking and spreading device.

FIG. 4 is a schematic diagram of a state in which a stacking device and a stacking device are combined with a conveyor.

[Explanation of Codes] 1 Box 2 Roller 3 Lifting Table 4 First Cylinder 5 Second Cylinder 6 Third Cylinder 7 Holding Claw 8 Holding Claw Height Adjusting Mechanism 9 Transmission Member 10 Drive Motor 11 Sensor 12 Stopper 13 Engagement Recess

Claims (1)

[Claims] 1. An elevation table for raising and lowering a box, a holding claw that is engageable with an engaging recess formed in a lower side portion of the box by insertion and withdrawal, and a height of a box to be sent in or a bottom box to be taken out. And a means for moving up and down the lifting platform by two steps to the first distance and the second distance, and the height position of the holding claw is
It is variable according to the height of the box that is sent in or the bottom box that is taken out, and the second distance of elevation of the elevating table is controlled to be equal to the height of the box. Stacking and stacking device.