JPH0144145B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (Field of Industrial Application) This invention is directed to making bags from a synthetic resin film band or tube band using a bag making machine and feeding them one by one or two at a time. This device relates to a device that neatly stacks incoming bags on a pedestal when a predetermined number of bags has been reached, gathers them, grabs them, and transports them to the next bag processing position.

(Prior art) As a prior art, first, each time a predetermined number of bags are stacked on a pedestal, the bag making machine is not stopped and the next bag is sent out for a very short time, e.g. A stopper is raised to grab a predetermined number of bags within seconds and stack the bags in an orderly manner.
A device that removes the bag group and lowers the stopper onto the pedestal again to prepare for the next bag to be sent out, and a device that is equipped with a pressing member that presses the upstream short part of the bag group on the pedestal each time. It was published as Publication No. 52-47649.

Other prior art devices have structures as shown in FIGS. 1 to 3. That is, a pedestal 2 is provided immediately downstream of a pair of upper and lower clamping type conveyor (including rollers) 1 for sending out bags of the bag making machine A.
This upstream end 3 is supported in a cantilever manner by the machine frame 4, and is formed into a comb-teeth shape toward the downstream direction. This pedestal 2
A downward comb-shaped stopper 6 whose upper end serves as a support part 5 is provided on the top. It is provided so that it can move up and down so that it can be retracted upward from a position where it can be inserted between the comb teeth of the bag. , the stopper 6 is provided so as to be retracted upward.

Furthermore, the bag group conveying means 7 has a pair of upper and lower gripping claws 8 that match the position between the comb teeth of the pedestal, and each time a predetermined number of bags are stacked on the pedestal 2, There is known an apparatus that advances from the side to the pedestal 2 position, clamps the stacked bags on the pedestal 2 between the comb teeth of the pedestal 2, and transports them to the next bag processing position on the downstream side.

Furthermore, if the bag group conveyance means is of a belt conveyor type, and while the bag group is being moved by the movement of the conveyor, there is a special device for receiving the bags sent out from the bag making machine on the auxiliary pedestal following the auxiliary pedestal. 1977-
As seen in Publication No. 39951, the one developed earlier by the applicant is known.

(Problem to be Solved by the Invention) However, in the first prior art mentioned above, when a predetermined number of bags are sent out, the time required for the next bag to be sent out is extremely short (0.6 seconds). Between,
This involves lifting and lowering the stopper to stack the bags in an orderly manner, reciprocating the conveying means, and moving the group of bags, resulting in rapid movement of these devices, which is accompanied by severe vibration and noise.

Further, since the pressing member presses the upstream end of the stacked bag group, the volume of the downstream portion of the bag group that grips the bag group is not necessarily compressed, and there is a risk of failing to grip the bag group.

On the other hand, in the second prior art, the operation of the bag making machine A is stopped while the bag group conveying means 7 grabs and conveys the stacked bags on the pedestal 2, and the operation of the bag group conveying means 7 is stopped. Although the operation is relaxed, the operating rate of the bag making machine A is low due to this pause operation, and an extra control device is required for this pause.

Furthermore, in the third prior art, not only is it difficult to transfer the bags temporarily received on the auxiliary pedestal onto the belt conveyor, but even if the auxiliary pedestal holds the bags, the bag group cannot be moved. Since the movement is based on the movement of the belt conveyor, the bag group is likely to collapse during this movement, and there are drawbacks to its practicality as a means of grouping the bags together and conveying them all at once to the next processing position. .

Therefore, the present invention improves the drawbacks of each of the above-mentioned prior art techniques, and when the bag group conveying means having gripping claws is in operation, succeeding groups of bags are sequentially received on a second pedestal serving as an auxiliary pedestal. Without temporarily stopping the bag-making machine, and without reducing the operating rate of the bag-making machine, the bags are stacked on the pedestal and are compressed by being held down by the second pedestal. This is to ensure that the gripping claws of the group conveying means are used to hold the group, so that it can be conveyed accurately without failing to grasp it.

B. Structure of the Invention (Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention receives bags B that are sent out sequentially by a pair of upper and lower clamping type conveyor 1, and the upstream end is placed in the machine frame 4. A pedestal 2 is cantilever-supported and has a comb-teeth shape facing downstream from the pedestal 2, and each time a predetermined number of bags are stacked on this pedestal 2, the bags are aligned between the comb-teeth of the pedestal. A bag group conveying means 7 is provided for grasping the stacked bags B with a gripping means having a pair of upper and lower gripping claws 8 at a position, and transporting the stacked bags B to the next bag processing position downstream of the pedestal 2. A comb-shaped stopper 6 is provided on the top at the base of the bag group conveying means 7 and is directed downward at a position that does not contact the gripping claws 8 of the gripping means.
In this device, the stopper 6 is arranged so as to be retracted upward from the pedestal only when the conveyor 1 is activated, and the stopper 6 is always moved up and down within the range where the bags B delivered from the conveyor 1 collide with each other. There are, and downstream of these,
A presser foot/second pedestal 13 whose downstream end is cantilever-supported by a support part and has comb teeth extending in an upstream direction from this point.
The presser foot/second pedestal 13 is arranged so that its comb teeth do not come into contact with the stopper and the gripping claws of the bag group conveyance means 7, and the presser/second pedestal 13 a vertical reciprocating drive for vertically reciprocating the presser/second pedestal 13, which is connected to a horizontal reciprocating drive means for horizontally reciprocating horizontally between a position above the pedestal 2 and a position downstream of the stopper 6; It is also connected to means, and while the bags are being stacked on the pedestal,
When a predetermined number of bags are stacked, the presser foot/second pedestal 13 located on the downstream side of the stopper is moved up and down by the vertical reciprocating drive means, presses the bag on the pedestal 2 against it, and then lifts up. The automatic stocker in the bag making machine A is characterized in that the automatic stocker is moved once to a downstream position of the stopper 6 by the horizontal reciprocating drive means.

(Operation of the Invention) When a bag material strip is supplied to the bag making machine A in the apparatus of the present invention configured as described above and the entire apparatus of the invention is operated, the stopper 6 first moves to the pedestal 2.
The presser foot/second pedestal 13 is in the upwardly lowered state.
The operation is started from a position where the bags B sent out by the conveyor 1 do not get in the way of being stacked on the pedestal 2.

The downstream end (tip) of each bag B hits the stopper 6, and the bags B are stacked one after another on the pedestal 2 in an orderly manner (fourth (see figure).

Next, when the number of bags in the bag group B ₂ reaches a predetermined number, the presser/second pedestal 13 moves from its standby position to the pedestal 1 by passing between the comb teeth of the stopper 6. The presser foot/second pedestal 13 is moved to a position above the upper bag part by the horizontal driving means, and is further moved by the vertical driving means to hold a predetermined number of bags B ₂ on the pedestal 2. 2 to compress its bulky dimensions.

While the bag group is being compressed by the presser/second holder 13, the bags _B1 that are sent out one after another are stacked one after another along the stopper 6 on the presser/second holder 13.

Next, the presser foot/second pedestal 13 is returned to the position downstream of the stopper by the horizontal driving means. At this time, the movement of the several bags _B2 on the presser/second pedestal 13 is prevented by the stopper 6, so they are stacked on top of the bag group B2 stacked on the pedestal ₂ . .

When a predetermined number of bags _B2 are stacked on the pedestal 2, the presser/second pedestal 13 is again moved from the downstream position of the stopper 6 between the comb teeth of the stopper 6 by the horizontal driving means. The bag group B 2 is advanced onto the bag group on the pedestal 2, and the presser/second pedestal 13 is lowered by the horizontal drive means to press the bag group B ₂ onto the pedestal 2.

Next, the bag group conveying means 7 advances from the standby position with the gripping claws 8 opened up and down, and from between the comb teeth of the stopper 6, the second
The downstream end of the bag group _B2 is held between the comb teeth from above and below. Concurrently with these operations, the stopper 6 rises enough to allow the bag group B2 grabbed by the gripping claws ₈ to pass (Figs. 6 and 8).
(see figure).

Next, the bag group conveyance means 7 moves downstream and conveys the bag group _B2 all at once to the next bag processing position.
Immediately after this conveyance is completed, the stopper 6 descends and returns to its original position.

During this time, the bags are stacked one after another on the presser/second pedestal 13 (see FIG. 7).

Finally, the presser and second pedestal 13 is also moved to the waiting position on the downstream side of the stopper 6, and the several bag groups _B1 on this presser and second pedestal 13 are transferred onto the pedestal 2. , and then the bags B are sent out by the conveyor 1 and stacked on top of this one after another.

Thereafter, the above-described operation is repeated.

These sequential operations are performed by operating the stopper 6, the presser and second pedestal 13, and the bag group conveyance means 7 in response to command signals from the sequence control device. Alternatively, the above-mentioned command signals may be performed by driving each of the above-mentioned driving means using sequential output signals according to a program preinstalled in a computer.

(Example) The apparatus of the present invention will now be described in more detail based on an example.

In the embodiment, it is of course equipped with the structure of the above-described device invention, but also includes the presser foot/second pedestal 13 and separate drive means for moving it horizontally and vertically. This constitutes a presser/second pedestal device 10.

To explain in more detail, the downstream end of the presser/second pedestal 13 is the base 11, and the second comb teeth 12 extend upstream from this.
The comb teeth 12 are positioned so that they do not come in contact with the comb teeth of the stopper 6 and the gripping claws 8 of the bag group conveying means 7, and the presser foot/second pedestal 13 is approximately the same size as the pedestal 2. be. Further, the above-mentioned vertical movement and horizontal movement in the upstream and downstream directions of the presser foot/second pedestal 13 are performed by air cylinder devices 16 and 17, which are respectively one type of vertical driving means and horizontal driving means. It has been installed.

In other words, the support part 1 at the downstream end of the presser and second pedestal 13
1 is fixed to a vertically moving member (rod integrated with a piston) 14 of an air cylinder device 16 in the vertical direction,
The cylinder of the vertical air cylinder device 16 is fixed to the horizontally movable member 15 of the horizontal air cylinder 17, and the cylinder, which is a stationary part of the horizontal air cylinder device, is fixed to the machine frame. , 17, the presser foot/second pedestal 13 can be moved in the vertical direction and the upstream/downstream direction (see FIGS. 4 to 8).

Therefore, by the horizontal air cylinder 17,
The presser/second holder 13 has a position on the upstream side of the stopper 6 where the bag B is temporarily received and pressed, and a position where the bag B is temporarily held and pressed on the upstream side of the stopper 6.
It is designed to be able to move to a position that is more downstream than the above, and can be moved to an upper position and a pressing position by means of a vertical air cylinder 16.

The aforementioned driving means consisting of the two air cylinder devices 16 and 17 is just an example, and the air cylinder device 16 may be one in which two air cylinder devices are connected in series above and below, or a part of the air cylinder device 16 may be connected to a motor or other device. or other driving means.

Next, the bag group conveyance means 7 is also provided so as to reciprocate along the conveyance direction by an air cylinder device, as illustrated in FIGS. 4 to 9.

(Operation of the embodiment) To stack the bags B on the pedestal 2, the horizontal air cylinder device 17 is activated, the presser/second pedestal 13 is positioned downstream of the stopper 6, and the vertical air cylinder device 17 is activated. By means of the device 16, the presser foot/second pedestal 13 is placed in the upper standby position, and the bag group conveying means 7 is placed in the standby position at a position downstream of the stopper 6 with the gripping claws 8 open. I'll leave it as that.

Next, the stopper 6 is lowered, and the starting position is such that the lower ends of the comb teeth are inserted between the comb teeth of the pedestal 2.

Then, the stopper 6 is lowered, and the state where the lower ends of the comb teeth are inserted between the comb teeth of the pedestal 2 is set as the starting position.

When the entire device is operated, the bags B are sent out one by one by the pair of clamping type conveyor 1.
sequentially, their downstream ends hit the stopper 6,
Following this, they are stacked one after another in an orderly manner on the pedestal 2.

Next, if this predetermined number of sheets is stacked, for example, 100 sheets, each time the number of sheets reaches 20, the horizontal air cylinder device 17 operates the presser foot/second pedestal 13, and the presser/second pedestal 13 is activated. The comb teeth of
The bags are advanced onto the pedestal 1 through the comb teeth of the stopper 6, moved downward by the vertical air cylinder device 16, and pressed onto the pedestal 2 every time 20 bags are added. do.

Even while this presser/second holder 13 is pressing, the subsequent bag groups _B1 are temporarily received on this presser/second holder 13 one after another. Next, the presser foot/second holder 13 is again moved downstream from the stopper 6 by the horizontal air cylinder device 17, and at this time, a small number of sheets (approximately 2 to 5 sheets) are placed on the presser/second holder 13. Bag group B ₁ is prevented from moving by stopper 6,
Only the presser and second pedestal 13 is pulled out, and the small number of bags _B1 is stacked on top of the bag group B2 already stacked on the pedestal ₂ .

Next, according to the above-mentioned example, when the number of bags in the bag group _B2 reaches 100, the above-mentioned presser and second pedestal 13 is again placed on top of the bag group _B2 on the pedestal 2, as in the device of the present invention. At the same time, the bag group conveying means 7 also advances and the bag group
Hold B ₂ . Since the other functions are the same as those of the apparatus of the present invention, the explanation will be omitted.

When the number of bags in the bag group B ₂ is 100 or 200 and transported to the next bag processing position, the presser and second pedestal 13 is used to press every 20 or 25 bags as described above. Program it in advance and run it.

(Effects of the Invention) In the device of the present invention constructed and operated as described above, the bags stacked on the pedestal 2 are
When carrying out B ₂ from this by the bag group conveyance means 7, the bag making machine A can be operated continuously without stopping at all, and the bag making machine A can be operated continuously during stacking once or more every time several bags are stacked. A group of bags are stacked up to the set number by repeated pressing with the presser and second holder.
Since B ₂ is pressed at least once, the air between each bag B is eliminated, and the stacked bag group B ₂ is compressed, and each bag B is in close contact with each other, so that there is no air in the work area during stacking. There is no risk of the load collapsing due to air currents, etc., and the pedestal 2 and presser foot 2
Since the bag group B ₂ is grabbed by the bag group conveying means 7 while being held by the cradle 13, the bag group B ₂ can be accurately grabbed.
Accurate transportation is possible. In addition, these operations can take more time than the interval between feeding each bag, and the operation of each operating part does not move suddenly and is quiet, with little vibration and ensures the removal of air between each bag. becomes.

Therefore, even if the bag is made of extremely thin film or has a seal on one side, it is possible to precisely bundle and convey a predetermined number of bags.

(Effects of the Embodiment) As mentioned above, in addition to the effects of the present invention, the bag group _B2 being stacked is repeatedly pressed once or more every time several bags are stacked until a predetermined number of bags are stacked. Even if there are a large number of sheets, they can be stacked neatly and transported accurately.

In the above-mentioned embodiment, the bag material strip F is fed out for one bag length and cut by the cutter 9 to form the bag B, but one piece of bag material that has already become an independent bag is Even if it is a device that feeds out one sheet,
The same applies to this invention. Further, if the bags B are stacked two times and sent out at once by a conveyor, the present invention is the same even if two or more bags are sent out in parallel at the same time.

[Brief explanation of drawings]

The drawings show things related to this invention,
Fig. 1 is a side view of a conventionally known device in which bags are being stacked, Fig. 2 is a side view of the device shown in Fig. 1 in a state where a group of stacked bags is being held between gripping claws, and Fig. 3 is a plan view of Fig. 2. 4 to 8 show typical embodiments of the present invention. FIG. 4 is a side view of the one in which the presser foot and second holder are on standby, and FIG. 5 is a side view of the second holder that also serves as the presser foot. 6 is a side view of the bag group being held by the gripping claws; FIG. 7 is a side view of the bag group being conveyed by means of conveying the group; FIG. 8 is a front view of the pedestal; 9th
This figure is a side view similar to FIG. 4 showing another embodiment. Code, A...Bag making machine, 1...Conveyor, 2...
... cradle, 3 ... upstream end, 4 ... machine frame, 5 ... support section, 6 ... stopper, 6a ... comb tooth, 7 ... bag group conveyance means, 8 ... gripping claw, 10 ... Presser cum second
pedestal device, 11... support section, 12... comb teeth, 13
...Presser/second pedestal member, 14...Vertical movement frame, 1
5... Horizontal moving frame, 16, 17... Air cylinder device.

Claims (1)

[Scope of Claims] 1. The bags are sent out sequentially by a pair of upper and lower clamp conveyors, and the upstream end is cantilever-supported by the machine frame, and a comb-like receiving table is provided toward the downstream side of the bag. A group of bags that is provided and has a pair of upper and lower gripping claws at positions corresponding to the comb teeth on the pedestal to grasp the stacked bags and transport them to the next bag processing position downstream of the pedestal. A conveying means is provided, and a comb-shaped stopper is provided on the pedestal, the upper part of which is a base and faces downward at a position where the upper part is not in contact with the gripping claws of the gripping means, and only when the bag group conveying means is activated.
In a device that is provided to be retracted upward from the pedestal, the stopper is positioned so that it always moves up and down within the range where the bags sent out from the conveyor collide. A presser foot/second pedestal is provided, the end of which is cantilever-supported by the support portion, and has comb teeth extending upstream from the presser foot/second pedestal, and the comb teeth of the presser foot/second pedestal are located at the stopper. and a position where it does not come in contact with the gripping claw of the bag group conveying means, and the presser/second pedestal horizontally reciprocates the presser member between a temporary bag receiving position on the pedestal and a position downstream of the stopper. The bag is connected to a horizontal reciprocating drive means for vertically reciprocating the presser foot and the second cradle, and is also connected to a vertical reciprocating drive means for vertically reciprocating the presser foot and the second pedestal, and while the bags are being stacked on the pedestal,
When a predetermined number of bags have been stacked, the presser foot/second pedestal located on the downstream side of each stopper is moved up and down by the reciprocating drive means, presses the bag on the pedestal against it, and then rises. An auto stocker for a bag making machine, characterized in that it is moved once to a downstream position of a stopper by a reciprocating drive means.