JPH06286031A - Reinforcement sheet conveying device in bag making machine - Google Patents

Abstract

(57) [Summary] [Purpose] A long reinforcing sheet can be cut into desired dimensions and inserted securely between two layers of long sheet material, ensuring sufficient strength. (EN) Provided is a conveying device for a reinforcing sheet in a bag making machine capable of producing a bag with high efficiency by a simple structure. [Structure] A cutting means 3 for cutting a long reinforcing sheet 5 supplied in a direction orthogonal to a long sheet material 7 into desired dimensions.
0, a first conveying means 10 for sandwiching both edges of the cut reinforcing sheet with the long sheet material 7 in the orthogonal direction, and conveying this to the long sheet material 7, and is conveyed by the first conveying means 10. Second conveying means 2 for sandwiching the side edge portion of the reinforcing sheet 5 in the cutting means direction and inserting it between the two long sheet materials 7
With 0 and.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing sheet conveying device in a bag making machine, and more particularly, to a bag having a reinforcing sheet at the inner edge of an opening thereof, and welding two layers of long sheet material. The present invention relates to a conveying device for the reinforcing sheet in a bag-making machine formed by cutting the welded portion.

[0002]

2. Description of the Related Art Generally, a bag formed of a long sheet material such as a synthetic resin sheet (hereinafter referred to as a long sheet material) is formed by stacking two long sheet materials or by stacking two long sheet materials. A long sheet material is folded and formed into two layers, which are welded to each other to form a bag having a desired size and cut at the welded portion to form individual bags. Some of such bags have a grip hole for inserting a hand to lower the bag, or a handle or the like fixed to the edge of the opening. In such a bag, when various kinds of articles are put in and lowered, the stress naturally concentrates on the part where the grip hole is formed or the part where the handle is fixed. Therefore, this part must be reinforced by some means. I won't. Therefore, it has been conventionally performed to reinforce the bag by bending the opening of the bag to make it double.

[0003]

However, even if the bag is reinforced by bending the opening portion of the bag to be doubled as described above, there are cases in which the bag cannot be sufficiently reinforced. Therefore, it is possible to form a reinforcing sheet with a material having a strength higher than that of the material forming the bag, provide the reinforcing sheet at the edge of the opening of the bag, form a grip hole in this portion, or fix a handle or the like. Was devised. In this case, if the reinforcing sheet is provided on the outer surface of the bag, problems such as impairing aesthetics and catching the reinforcing sheet occur. Therefore, naturally, the reinforcing sheet must be provided on the inner surface of the bag.

By the way, in order to provide the reinforcing sheet on the inner edge of the opening after cutting the long sheet material into a single bag, the opening of the bag is opened, and the reinforcing sheet is inserted from the opening. It is necessary to position it at a desired position and fix it with an adhesive or the like, which requires very troublesome work, and in order to automate this, it is predicted that a considerably complicated and large device is required. It For this reason, it is desired that the steps including the step of providing the reinforcing sheet be automated by a simple device in the series of steps in the bag making machine, particularly the step before welding and cutting the two-layer long sheet material.

Further, with the recent improvement in bag production efficiency, it is naturally necessary to supply the reinforcing sheet at a high speed. For example, in order to supply the reinforcing sheet formed as a single unit in advance, a large number of sheets are required. The reinforcing sheets must be neatly aligned, individually conveyed and supplied, and it is expected that a considerably complicated and large apparatus is required in this case as well. For this reason, it is desired that the reinforcing sheet is, for example, a long one wound in a roll shape, and that the reinforcing sheet can be cut into a desired size and supplied depending on the production of the bag.

The present invention has been made in view of the above circumstances, and an object of the present invention is to cut a long reinforcing sheet into a desired size and cut this into a two-layer long sheet material. It is an object of the present invention to provide a conveying device for a reinforcing sheet in a bag making machine, which has a simple structure and can be reliably inserted into a bag, and which can produce a bag having a sufficient strength with high efficiency.

[0007]

[Means for Solving the Problems] The means adopted by the present invention for solving the above problems will be described with reference to the reference numerals used in the drawings. "A reinforcing sheet 5 is provided at the inner edge of the opening 4. A conveyance device for the reinforcing sheet 5 in a bag-making machine, comprising: forming a bag 1 having two layers of long sheet material 7 welded to each other and cutting at the welded portion. Cutting means 30 arranged in a step prior to the welding and cutting steps and for cutting the long reinforcing sheet 5 supplied in a direction orthogonal to the long sheet material 7 into desired dimensions, and the cut reinforcing sheet 5. First conveying means 10 for sandwiching both edges of the long sheet material 7 in the direction orthogonal to the long sheet material 7 and conveying it to the long sheet material 7, and a cutting means 30 for the reinforcing sheet 5 conveyed by the first conveying means 10. Of the long sheet material 7 of two layers by sandwiching the side edge in the direction A conveying device "of the reinforcing sheet 5 at the bag making machine is characterized in that a second transport means 20 to be inserted into.

[0008]

The transporting device for the reinforcing sheet 5 in the bag-making machine of the present invention thus constructed operates as follows.

First of all, in this carrying device, a long sheet material 7 is welded and cut in a series of steps of a bag making machine to form a single bag 1
The reinforcing sheet 5 is disposed in the step before the step of forming the reinforcing sheet 5, and when the reinforcing sheet 5 is inserted between the two long sheet materials 7 of two layers, the opening 4 of the single bag 1 is opened and the reinforcing sheet 5 is formed. Need not be inserted and the structure will be simplified.

Next, this conveying device is provided with a cutting means 30. The cutting means 30 cuts the long reinforcing sheet 5 into a desired size, and the cut reinforcing sheet 5 becomes a single piece. If they are sequentially conveyed, it is not necessary to orderly arrange a large number of reinforcing sheets 5 that are individually formed in advance, and the structure is further simplified.

As described above, according to this carrying device, the long reinforcing sheet 5 is cut sequentially according to the production of the bag 1 by the simplified structure, and the bag is conveyed between the long sheet materials 7. Since it can be inserted, it can be sufficiently applied to a bag-making machine that produces the bag 1 with high efficiency.

By the way, the reinforcing sheet 5 cut into a single piece from the long sheet is conveyed in the direction of the long sheet material 7 by the first conveying means 10. At this time, the first sheet is conveyed. The means 10 is the long sheet material 7 of the reinforcing sheet 5.
Since it is configured to be carried while sandwiching both edge portions on the side orthogonal to the above, there is no adverse effect such as the first carrying means 10 interfering with the remaining long reinforcing sheet 5 or cutting means 30. The reinforcing sheet 5 is surely conveyed in the direction of the long sheet material 7 without any trouble. Then, the conveyance of the reinforcing sheet 5 by the first conveying means 10 ends before the first conveying means 10 interferes with the long sheet material 7.

Next, the reinforcing sheet 5 conveyed in the direction of the long sheet material 7 by the first conveying means 10 is conveyed by the second conveying means 20 and inserted between the two long sheet materials 7. However, at this time, the second conveying means 20 nips and conveys the side edge of the reinforcing sheet 5 in the direction of the cutting means 30, so that the second conveying means 20 conveys the first conveying means 10 and the long sheet material 7 or the like. Without causing harmful effects such as interference with
The reinforcing sheet 5 is reliably conveyed without any trouble and is inserted between the two long sheet materials 7.

When the reinforcing sheet 5 thus inserted between the two long sheet materials 7 by the second conveying means 20 is pressed and bonded, or heated and pressed to be welded, The reinforcing sheet 5 can be reliably fixed to the long sheet material 7.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a conveying device for a reinforcing sheet 5 in a bag making machine according to the present invention will be described in detail with reference to the drawings.

First, FIG. 1 shows an example of a bag 1 formed by a bag making machine. In this bag 1, a long sheet material 7 made of a synthetic resin is folded, the folded portion is a bottom portion 2, and the welded and cut portions having a desired size are both side portions 3. A reinforcing sheet 5 is provided on the inner edge of the opening 4, and both ends of the reinforcing sheet 5 are welded to the bag 1. Further, a grip hole 6 is formed in the portion provided with the reinforcing sheet 5 so that the bag 1 can be lowered by inserting a hand.

When forming such a bag 1, the long sheet material 7 is folded and formed by a bag-making machine which carries out a series of processes. The long sheet material 7 is welded in a desired size,
In the process before cutting, the conveying device for the reinforcing sheet 5 of the present invention shown in FIGS. 2 and 3 is provided. In this bag-making machine, the reinforcing sheet 5 inserted between two layers of the long sheet material 7 is welded to the long sheet material 7 by the welding means 200 to form the grip holes 6, and then the individual individual bags are formed. The long sheet material 7 is welded and cut so that

As shown in FIG. 2, the reinforcing sheet 5 is formed in a long shape from a material that is adhered by heating and pressing, and is wound into a roll shape. Then, one surface of the reinforcing sheet material is treated so as not to adhere even when heated and pressed, and one surface of the reinforcing sheet material is an adhesive surface. Therefore, when the reinforcing sheet 5 is brought into contact with the adhesive surface and the long sheet material 7 and heated and pressed by the welding means 200, the reinforcing sheet 5 is welded to the long sheet material 7. At this time, The other surface of the reinforcing sheet 5, that is, the surface which is not the adhesive surface is not welded at all.

Further, the reinforcing sheet 5 is supplied so as to be laminated in two layers with the adhesive surface facing outward, and cut into desired dimensions by the cutting means 30. As shown in FIGS. 2A and 2B, the cut reinforcing sheet 5 is conveyed by the first conveying means 10, and the two-layer reinforcing sheet conveyed by the first conveying means 10. 5
As shown in FIGS. 2C and 2D, is inserted between the two long sheet materials 7 by the second conveying means 20 and is welded to each long sheet material 7. .

In this embodiment, a desired amount of long reinforcing sheet 5 is fed by a feed roller (not shown), and when the feed roller is stopped, a fixed cylinder (not shown) is operated to reinforce the reinforcing sheet 5. Is clamped and fixed. Then, the fixed reinforcing sheet 5 is cut by the operation of a cutter by the operation of a cutting cylinder (not shown). Further, a so-called one-way clutch that transmits rotational drive in one direction but does not transmit rotational drive in the other direction is used for the feed roller, and a lever (not shown) that swings by the operation of a feed cylinder (not shown) is used. ) It is made to rotate by the swing drive.

The reinforcing sheet 5 cut to a desired size is
It is conveyed by the first conveying means 10 and the second conveying means 20 of the conveying device as shown in FIGS. 3 to 4, and is inserted between the two long sheet materials 7 of two layers. The first conveying means 10 includes a first clamping portion 11 for clamping the long sheet material 7 of the reinforcing sheet 5 and both edges of the reinforcing sheet 5 in the direction orthogonal to the first clamping cylinder 12 by operation.
The second conveying means 20 is provided with a second holding portion 21 for holding the side edge portion of the reinforcing sheet in the cutting means 30 direction by the operation of the second holding cylinder 22. And
The first transfer means 10 and the second transfer means 20 are adapted to slide independently by the operation of the first transfer cylinder 13 and the second transfer cylinder 23, respectively.

The two-layer reinforcing sheet 5 inserted between the two-layer long sheet material 7 is welded to the long sheet material 7 at both edges by the operation of the welding cylinder 201. However, not limited to this, for example, an adhesive is filled between the long sheet material 7 and the reinforcing sheet material 5 for adhesion, or the long sheet material 7 and the reinforcing sheet material 5 are fixed by rivets. Good.

The cylinders in this transfer device are controlled so as to operate at the timing shown in FIG. First, when the feed cylinder moves forward, the feed roller is rotated and the desired amount of the reinforcing sheet 5 is fed. Then, the feed cylinder stops and the fixed cylinder moves forward to fix the reinforcing sheet. At this time, at the same time, the first clamping cylinder 12 moves forward, and the first clamping section 11 clamps the reinforcing sheet 5. Then, the feed cylinder retreats, but at this time, the feed roller does not rotate in the opposite direction due to the one-way clutch. And
The cutting cylinder advances to operate the cutter to cut the reinforcing sheet 5 into a desired length. After this, the cutting cylinder retracts, returns to the initial state, and waits for the next cutting of the reinforcing sheet 5.

The cut reinforcing sheet 5 is released from the fixing by retracting the fixed cylinder, and the first transfer cylinder 1
When 0 is retracted, it is conveyed in the direction of the long sheet material. Then, the second holding cylinder 22 moves forward to operate the second holding portion 21 to hold the reinforcing sheet 5, and at the same time,
The first sandwiching cylinder 12 retracts to release the sandwiching of the reinforcing sheet 5 by the first sandwiching portion 11. Then, the second transport cylinder 23 advances to insert the reinforcing sheet 5 between the two long sheet materials 7. At this time, the first transfer cylinder 1
3 moves forward, returns to the initial state, and stands by for the next conveyance of the reinforcing sheet 5.

The reinforcing sheet 5 inserted between the two layers of the long sheet material 7 is welded to the long sheet material 7 by advancing the welding cylinder 201. At this time, the feed cylinder moves forward to rotate the feed roller, and the next reinforcing sheet 5
And the above-described operation is repeated to convey the reinforcing sheet 5 and weld it to the long sheet material 7.

The embodiment of the conveying device for the reinforcing sheet 5 in the bag making machine according to the present invention which employs the cylinder has been described above, but the present invention is not limited to this, and for example, a motor as a drive source is used. Etc. may be adopted, or the operation timing of each drive may be changed.

[0027]

As described in detail above, the conveying device for the reinforcing sheet in the bag making machine of the present invention is arranged in the process before welding and cutting the long sheet material, and The reinforcing sheet for ensuring strength can be sequentially cut into a desired length from a long sheet depending on the production of the bag, and can be inserted between the two layers of long sheet material.

Therefore, according to the present invention, it is possible to cut a long reinforcing sheet into a desired size and surely insert it between two layers of long sheet material, so that sufficient strength is secured. It is possible to provide, with a simple structure, a device for conveying a reinforcing sheet in a bag making machine capable of producing the produced bags with high efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a bag.

FIG. 2 is a side view showing an outline of a reinforcing sheet conveying device in the bag making machine according to the present invention.

FIG. 3 is a plan view showing the outline of a reinforcing sheet conveying device in the bag making machine according to the present invention.

FIG. 4 is a front view showing an example of a transport device.

5 is a side view of the transfer device shown in FIG. 4. FIG.

FIG. 6 is a plan view of the transfer device shown in FIG.

FIG. 7 is a timing chart showing the operation timing of each cylinder of the transfer device.

[Explanation of symbols]

 1 Bag 2 Bottom 3 Side 4 Opening 5 Reinforcing Sheet 6 Gripping Hole 7 Long Sheet Material 10 First Transfer Means 11 First Clamping Part 12 First Clamping Cylinder 13 First Transfer Cylinder 20 Second Transfer Means 21 Second Clamping Part 22 Second clamping cylinder 23 Second transfer cylinder 30 Cutting means 100 Transfer device 200 Welding means 201 Welding cylinder

Claims (1)

[Claims] 1. Conveying the reinforcing sheet in a bag-making machine, which comprises forming a bag having a reinforcing sheet on the inner edge of the opening by welding two layers of long sheet material to each other and cutting at the welded portion. An apparatus, which is a cutting means disposed in a step prior to the welding and cutting steps of a long sheet material and for cutting a long reinforcing sheet supplied in a direction orthogonal to the long sheet material into desired dimensions. And a first conveying means for sandwiching both edges of the cut reinforcing sheet with the long-side sheet material in the direction orthogonal to the long-sheet material and conveying the same to the long-sheet material, and cutting the reinforcing sheet conveyed by the first conveying means. A conveying device for a reinforcing sheet in a bag-making machine, comprising: a second conveying means that holds a side edge portion in the means direction and inserts it between two long sheet materials.