JPS5924691B2 - Resin bag stacking transfer method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides for resin bags that are manufactured and sequentially sent out, for example, in the lower part of a bag-making machine that transports raw material intermittently and performs welding and cutting during the intermittent stops. The present invention relates to a method and apparatus for stacking and transferring resin bags, in which a set number of bags are stacked and then transferred to the rear.

Conventionally, this type of method and device involves bringing resin bags into contact with a stopper, aligning them, stacking them on a conveyor, and, with a set number of bags stacked, holding the resin bags above the stopper using a presser. It has been proposed to press the object, then raise the stopper, and then move the presser as a whole while moving the conveyor, thereby transporting the object rearward.

This conventional format has the following problems.
゜The stopper rises at the same time as the presser is pressed down and allows the presser to move downward (transfer), but it descends and returns to the stopper action position only when the presser that has moved backwards. Since this is after the stopper has been raised and returned to its proper position, the time in the non-operating position becomes long, which poses a problem in terms of efficiency.

Note that when the stopper is in the non-operating position, it is possible to send out several resin bags, but since the delivered resin bags are not received by the stopper, they will be uneven, and the intended purpose of alignment will not be achieved. However, it is not possible to reliably carry out stacking. When a newly delivered resin bag is received by a stopper while the conveyor is moving, the resin bag becomes wavy due to friction with the moving conveyor, and proper stacking cannot be expected. The present invention provides a method and apparatus for stacking and transferring resin bags that can solve the above-mentioned problems, and one embodiment thereof will be described below with reference to FIGS. 1 to 7.

In FIGS. 1 to 3, an intermittent delivery roll 1 and a cutting device 2, which are the rear part of the bag making machine, are shown. Reference numeral 3 denotes a pedestal provided at the lower end of the cutting device 2, and a comb-shaped tooth space 4 is formed at the lower end thereof.

5 is a stopper disposed above the lower part of the pedestal 3;
A comb tooth space 6 is formed in the lower part thereof.

This stopper 5 is movable between a resin bag receiving position where it contacts the pedestal 3 and a non-receiving position where it escapes upward, and its movement can be performed by raising and lowering using a cylinder or by using a rotary solenoid. This is possible due to the rocking motion used. Note that both the comb tooth spaces 4 and 6 are opposed to each other. The stopper 5
A stacked resin bag clamping device 7 is provided below the pedestal 3 and the stopper 5, which is movable through the interdigitated spaces 4 and 6 of the stopper 5. That is, this clamp device 7
, a pair of left and right cylinders 8A, 8B, a receiving plate 9 that is attached between these cylinders 8A, 8B and can be positioned below the pedestal 3, and both piston rods 10A, 10B.
The presser plate is composed of a spanning board 11 installed between the two, and a plurality of presser plates 12 that are integrated with the spanning plate 11 and are positioned at the upper blade of the receiving plate 9 through the spanning tooth space 6, and that move up and down. The tips of the stacked resin bags can be held between the bag 12 and the receiving plate 9 from above and below. Reference numerals 13A and 13B denote a pair of left and right cylinder devices, which constitute a drive device for reciprocating the clamp device 7 in the resin bag delivery direction, but these may also be a pair of left and right drive chains.

Reference numeral 14 denotes a conveyor provided below the pedestal 3, which receives the stacked resin bags 15 and intermittently conveys them at a predetermined pitch.

Reference numeral 16 denotes a pressing device which is provided at the upper part of the conveyor 14 and which presses the rear part of the stacked resin bags 15 between the conveyor 14 and a pair of left and right levers 17A, 17B and between the upper ends of these levers 17A, 17B. The levers 17A and 17B are pivoted by cylinders or rotary solenoids.

FIG. 1 shows a state in which resin bags manufactured by the bag-making machine and intermittently delivered are received. That is, the stopper 5 is in the receiving position with its lower end abutting against the pedestal 3, and the extrusion device 16 is in the non-operating position. The clamping device 7 has moved forward most due to the extension of the cylinder devices 13A and 13B, and the receiving plate 9 has been positioned below the pedestal 3, and the holding plate 12 has moved upward to the non-clamping position.
is positioned at the upper blade of the receiving plate 9 through the comb tooth space 6. In this state, the resin bags are intermittently delivered one after another and are stacked up while being received by the stopper 5. For example, when the predetermined number of stacked sheets is 100 sheets, the clamp device 7 is pressed from the bag making machine side when sending out every 10 sheets or when pushing out every 20 sheets.
An activation signal is issued, and the presser plate 12 is lowered and raised each time this signal is issued. Due to the pressure caused by this downward movement, air is removed from the already stacked stacks and the stacks are tidyed up, thereby facilitating subsequent stacking. However, if it is normal to stack a predetermined number of stacks at once, this operation is omitted.
The cylinders 8A and 8B of the clamp device 7 are moved to contract in response to a signal sent out a predetermined number of times, and as shown in FIG. Clamp from above and below. At this time, the stacked resin bags 15 enter the comb tooth space 6 and are received by the receiving plate 9. At this time, the stopper 5 has been raised to the non-receiving position. Next, both cylinder devices 13A and 13B are moved to contract,
As shown in FIG. 5, the stacked resin bags 15 are pulled out from above the pedestal 3. At this time, the stopper 5 is lowered and comes into contact with the upper surface of the stacked resin bag 15 that is being drawn out, so that the newly delivered resin bag is received by the stopper 5. Although the stacked resin bag 15 being pulled out and the new resin bag come into sliding contact, the new resin bag is not disturbed because the resin surfaces are mutual. Completely pull out the stacked resin bags 15 as shown in FIG.
The first stage contraction of both cylinder devices 13A and 13B is stopped in the state where they are placed on top. At the same time as this stop, the pressing device 16
is activated, and the presser 18 presses and holds the rear part of the stacked resin bags 15 between it and the conveyor 14. Furthermore, at this time, the cylinders 8A and 8B extend, and the holding plate 12 moves upward to release the clamping, as shown by the imaginary line in FIG. Next, the cylinder devices 13A and 13B are contracted in a second stage, and as a result, as shown in FIG.
The front part is stacked on the rear part of the stacked resin bag 15 placed above. At the time of this fall, the rear part is the pressing device 16
Since the stacked resin bags 15 are held under pressure by
There is no disturbance. Next, the pressing device 16 is returned to the non-pressing position as shown by the imaginary line in FIG. 7, and then the conveyor 14 is moved by a predetermined pitch P. The clamping device 7 is then moved forward by the extension of the cylinder devices 13A, 13B and returned to the position shown in FIG. 1 again. Note that the series of operations described above are controlled by an electric circuit including measuring equipment and the like. As shown in FIG. 8, the clamp device 7 includes a connecting plate 19 attached between both cylinder devices 13A and 13B, a plurality of opening/closing drive devices 20 attached to this connecting plate 19, and a plurality of opening/closing drive devices 20 attached to the opening/closing drive devices 20. A configuration consisting of a pair of upper and lower clamp arms 21A and 21B that are moved to open and close can also be adopted. According to this configuration, since the lower clamp arm 21B passes through the comb tooth space 4 and moves to the clamping position, it is possible to reduce the sliding resistance that occurs between the stacked resin bags 15 and the pedestal 3 during withdrawal. In the above embodiment, the conveyor 14
Above, a state in which a part of the next stacked resin bag 15 overlaps with the preceding stacked resin bag 15 was shown, but this can be done by ensuring a sufficient predetermined pitch of the conveyor 14.
The transport configuration shown in the figure is also possible.

As described above, according to the resin bag stacking and transferring method of the present invention, although it is possible to reliably accomplish the intended purpose of stacking while aligning, the return movement of the clamping device is performed by lowering the stopper to the receiving position. Since this can be done later and while new stacking is being done on the pedestal, stacking can be done more efficiently than in a method in which stacking is carried out after the clamping device is restored. Furthermore, stacking is performed on a pedestal, and a predetermined number of stacked resin bags are transferred to a conveyor and then stored as the conveyor moves, so the newly stacked resin bags are not affected in any way when the conveyor moves. , both can be expected to operate smoothly. Furthermore, the operation of removing the clamping device from the stacked resin bags on the conveyor is performed by moving the clamping device further down while the rear part of the stacked resin bags is held between the pressing device and the conveyor. This can be done without disturbing the bag. In addition, according to the resin bag stacking apparatus of the present invention, the method of the present invention can be carried out easily and reliably.

[Brief explanation of the drawing]

1 to 7 show one embodiment of the present invention, FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is an A-A in FIG. 1.
A cross-sectional view, FIGS. 4 to 7 are side views showing the operating state, and FIG.
The figure is a side view showing another embodiment, and FIG. 9 is a side view showing another example of operation. 3... pedestal, 4... comb tooth space, 5...
...Stopper, 6...Comb tooth space, 7.
... Clamp device, 9 ... Reception plate, 12
...Press plate, 13A, 13B... Urinda device (drive device), 14... Conveyor, 15
...Stacked resin bags, 16...Press device, 20...Opening/closing drive device, 21A, 21B...
...Clamp arm.

Claims (1)

[Claims] 1. Stack the resin bags intermittently delivered from the bag-making section on a pedestal while aligning the tips with a stopper, and when a set number of bags have been stacked, the tips of the stacked resin bags are clamped by a clamp device. After clamping from above and below and moving the stopper to the non-receiving position, the clamping device is moved downwardly to transfer the stacked resin bags from the pedestal to the conveyor, and then the stopper is returned to the accommodating position and the bag is removed from the cradle. During this stacking, the extrusion device is operated to clamp the rear part of the stacked plastic bags between the conveyor and the clamping device is released, and then the clamping device is further lowered. A resin bag characterized in that a clamping device is removed from the tip of a stacked resin bag by moving the bag, and then the clamping device is returned to a position where it can be clamped, and a conveyor is moved by a predetermined pitch while the clamping device is released from the clamping device. Stacking transfer method. 2. At the bottom of a bag making machine that intermittently sends out resin bags, a cradle with a comb-shaped lower part is provided, and above the bottom part of this cradle, there is a holder that extends between the resin bag receiving position and the non-receiving position. A movable comb-shaped stopper is provided, the comb-tooth spaces between these pedestals and the stopper face each other, and the comb-tooth spaces between the pedestals and the stopper can be moved below the stopper and above the stopper through the comb-tooth spaces between the pedestals and the stopper. A clamping device capable of clamping the leading end of the stacked resin bags from above and below is provided, and a drive device for reciprocating this clamping device in the resin bag delivery direction is provided below the pedestal for receiving the stacked resin bags. 1. A resin bag stacking device, comprising a conveyor, and a pressing device provided at an upper part of the conveyor to clamp the rear part of the stacked resin bags between the conveyor and the conveyor.