JPH0657600U - Thermal fusion cutting device for sheet-shaped members - Google Patents

Abstract

(57) [Abstract] [Purpose] A so-called side-seal type bag in which the sheet-like member is folded at the bottom and the both side edges are heat-sealed, and the side seals on both side edges have a uniform and good finish. (EN) Provided is a heat fusion cutting device for sheet-like members which can be manufactured with high commercial value. [Structure] A thermal fusion cutting blade 6 and a receiving member 7 are provided in the middle of a transportation path of a sheet member 1 that is folded in half, sandwiching the transportation path. The conveying means 9 and 10 which are configured to be capable of intermittent driving are provided on the downstream side and the downstream side, respectively, and the conveying means 9 on the upstream side is configured to be capable of reverse conveying driving, and the sheet shape by the heat fusion cutting means 8 is provided. After the heat fusion cutting of the member 1, both the transporting means 9 and 10 are driven in the direction in which the heat fusion cutting portions are separated from each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet-shaped member heat-sealing device for cutting (burning) a sheet member that is folded in half in the middle of a conveyance path at the same time when it is heat-sealed. It is used when manufacturing a so-called side-seal type bag in which the two-folded portion of the shaped member is the bottom portion and the heat-sealed portion is the side edge.

[0002]

[Prior art]

 In the middle of the conveyance path of the sheet member that is folded in half and on one of the upper and lower sides across the conveyance path, a heat-sealing cutting piece over the entire width of the conveyance path is provided so as to be able to move up and down. A receiving member for the upper and lower sides of the conveyance path is provided, and intermittent driving is possible on the upstream side and the downstream side of the thermal fusion cutting means by the thermal fusion cutting blade and the receiving member. A heat-fusion cutting apparatus for sheet-shaped members provided with means is already known.

This device conveys a sheet member, which is folded in half, to a predetermined position by driving both conveying means provided on the upstream side and the downstream side of the heat fusion cutting means for a predetermined time. Then, in a state where the driving of both the transporting means is stopped, the sheet-shaped member is heat-sealed and cut by the heat-sealing cutting means, and then the heat-sealing cutting edge of the heat-sealing cutting means is separated from the member. By driving only the conveying means on the downstream side, the thermal fusion cutting portions adjacent to each other, that is, the side seal portions on the side edges of the bag, are separated from each other, and the lifting movement of the thermal fusion cutting sheet with respect to the receiving member is performed. Since the sheet-like member folded in half is heat-sealed (side seal) and cut at the same time, the cutting blade is reciprocally movable in the width direction of the conveying path on the lower side of the heat-sealing means in the conveying direction. And heat fusion Compared to a heat fusion cutting device that mechanically cuts the sheet-shaped member after (side sealing), the device can operate at higher speed, and the manufacturing efficiency of side-sealed bags can be improved. have.

[0004]

[Problems to be solved by the device]

 However, when observing the side seal part of the bag manufactured by the above-mentioned device in detail, the finished state of the side seal part on both side edges is uneven on the left and right, and more specifically, on the downstream side. It was found that the side seal part on the side separated by the means had a good finish, whereas the side seal part on the side in the position-fixed state had a slightly poor finish. .

The present invention has been made in view of the above circumstances, and is a sheet-like bag that can be manufactured with a high commercial value in which the finish of the side seal portion is uniform left and right by a simple improvement. It is an object of the present invention to provide a heat fusion cutting device for a member.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a heat-sealing cutting blade over the entire width of the conveyance path in the middle of the conveyance path of the sheet member folded in half and on one side above and below the conveyance path. In addition to being provided so as to be able to move up and down, a receiving member for the thermal fusion cutting blade is provided on the other upper and lower sides of the carrying path, and upstream and downstream of the thermal fusion cutting means by the thermal fusion cutting sheet and the receiving member. In a thermal fusion cutting device for sheet-like members, which is provided with a conveying means configured to be capable of intermittent driving on both sides, the upstream conveying means is configured to be capable of reverse conveying driving, and both conveying means are driven. After the heat-fusion cutting of the sheet-shaped member by the heat-fusion-cutting means in a stopped state, both the conveying means are driven in a direction to separate the heat-fusion-cutting portions of the sheet-shaped member from each other. It is said that.

[0007]

[Action]

 According to the above configuration, after the sheet-shaped member is heat-sealed and cut, when the downstream-side transport means is driven to transport, the upstream-side transport means is also temporarily driven in reverse transport, so that they are adjacent to each other. As a result, the heat-sealing cutting parts are separated under the same conditions, and the side seal parts on both side edges of each individual bag have a uniform finish.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a synthetic resin sheet member that is wound in a roll shape and is folded in approximately two with both edges in the width direction being wound in the same direction. While passing through the hook striking portion 2, a male hook a is attached to one winding edge portion and a female hook a is attached to the other winding edge portion at predetermined intervals. There is.

Reference numeral 3 denotes a thermal fusion cutting device disposed in the middle of the conveying path of the sheet-shaped member 1, and as shown in FIG. In addition to being provided above, the movable frame 5 is equipped with a heat fusion cutting blade 6 over the entire width of the transport path, while a receiving member 7 for the heat fusion cutting edge 6 is provided below the transport path. Conveying means 9 and 10 are provided on the upstream side and the downstream side of the heat-sealing cutting means 8 formed by the heat-sealing cutting case 6 and the receiving member 7.

Returning to FIG. 1, reference numeral 11 in the drawing is a slack absorbing means for the sheet-like member 1 provided between the hook striking portion 2 and the heat-sealing cutting device 3, and is a pair of fixed rollers 12 and 12. It comprises a movable roller 13 which is moved up and down between the rollers 12, and the movable roller 13 is lifted and biased by a biasing means (not shown) such as a spring, and the three rollers 12, 13, 12 are provided. The sheet-like member 1 wound in this order is configured so that it can be naturally tensioned.

Next, the detailed structure of each part of the thermal fusion cutting device 3 will be described. The thermal fusion cutting chamber 6 is controlled to a high temperature by an electric heater H incorporated therein as shown in FIG. As shown in FIG. 3, a coating c such as Teflon tape for preventing the adhesion of the molten resin is provided on the surface so that it can be replaced.

The movable frame body 5 provided with the heat fusion cutting blade 6 and the air cylinder 4 are provided with a locking metal member 15 fixed to a movable member 14 connected to the air cylinder 4 with a screw or the like. They are interlockingly connected to each other through an engaging groove 16 formed in the movable frame 5, and a vertical clearance is provided between the engaging groove 16 and the engaging metal fitting 15 engaged with the engaging groove 16. d is formed, and due to the existence of the accommodation gap d, the thermal fusion cutting blade 6 is pressed against the receiving member 7 by its own weight, irrespective of the descent driving force of the air cylinder 4. There is.

The transfer means 9 and 10 have a function of transferring the sheet-like member 1 in a synchronized manner, and are composed of upper and lower transfer elements 17 and 18, respectively, and have a lower transfer element 18 on the upstream side and a downstream transfer element 18 on the downstream side. The upper transporting element 17 is of a drive type and is fixedly positioned on the fixing member 19. The upper transporting element 17 on the upstream side and the lower transporting element 18 on the downstream side are the drive type transporting elements. In the driven type driven by Nos. 18 and 17, the upper transfer element 17 on the upstream side is fixed to the fixing member 19 and the lower transfer element 18 on the downstream side is air cylinder 20. It is provided on the elevating member 21 which is controlled to elevate and lower by.

More specifically, all of the transport elements 17 and 18 are structurally the same, and the upstream transport means 9 is used as an example, as shown in FIGS. The shafts 22 and 23 are provided at a predetermined interval, and a plurality of rubber rollers 24 having a large diameter in which a circumferential groove e is formed are provided on the upstream rotary shaft 22 at predetermined intervals, and the downstream rotary shaft is provided. 23, a metal roller 25 having a small diameter is provided, while an endless coil spring 26 is wound around the rubber roller 24 and the metal roller 25 in a state of being immersed in the circumferential groove e.

In the upstream conveying means 9, the rotary shafts 22 and 22 are provided on the fixed member 19 so that the upper and lower rubber rollers 24 are brought into contact with each other with the peripheral groove e having different phases. At the same time, with respect to the other rotary shafts 23, 23, this is provided on the fixing member 19 so that there is a gap between the peripheral surfaces of the metal roller 25, and the upper and lower coil springs 26 are provided on the opposite coil sides. The sheet-shaped member 1 can be inserted between the springs 26, and a motor 27 capable of controlling forward / reverse rotation and driving stop can be interlocked with the lower rotating shaft 22 to connect the sheet-like member 1 to either forward or reverse directions. It is also configured so that it can be intermittently driven in the direction.

On the other hand, in the downstream conveying means 10, the upper and lower rotary shafts have the same configuration as the upstream conveying means 9 described above with the elevating member 21 raised to a predetermined position. 22 and 22 are provided on the fixing member 19 and the elevating / lowering member 21, and the rotating shafts 23 and 23 on the other side are moved up and down with respect to the fixing member 19 so that there is a gap between the peripheral surfaces of the metal rollers 25. It is provided on the member 21 so that the upper and lower coil springs 26 are slightly inserted between the coil springs 26 of the opposite side, and the forward rotation controlled motor 28 is interlockingly coupled to the upper rotary shaft 22. The sheet-shaped member 1 can be intermittently driven and driven to the downstream side by driving the motor 28 and moving the lifting member 21 up and down.

The receiving member 7 is composed of a heat-resistant rubber roller having a Teflon coating f 3 on its peripheral surface for preventing adhesion of molten resin, and is conveyed by an interlocked motor 29. It is constructed so as to be rotationally driven intermittently in synchronization with the means 9 and 10.

Next, a so-called side seal type bag manufacturing operation by the heat fusion cutting device 3 having the above configuration will be described. As shown in FIG. 6, in a state where the heat fusion cutting blade 6 is lifted to a predetermined position, the upstream-side and downstream-side conveying means 9 and 10 are normally driven for a predetermined time to move the sheet-shaped member 1 to a predetermined position. Transport downstream across the dimension.

At this time, in the upstream portion of each of the conveying means 9 and 10, the sheet-shaped member 1 is transferred to the conveying action portion of the coil spring 26 so as to be peeled off from the rubber roller 24 by the coil spring 26, and is moved up and down. The rubber roller 24 and the coil spring 26 smoothly convey the material to the downstream side. On the other hand, since the upper and lower coil springs 26 are inserted into each other at the downstream side portions of the respective conveying means 9 and 10, the sheet-shaped member 1 becomes wavy in the width direction, so-called stiffness becomes strong. In addition, since the metal roller 25 around which the coil spring 26 is wound has a small diameter, the sheet-shaped member 1 is separated from the coil spring 26 by the strength of its own waist. There is no need to worry about being caught up and down.

Here, as shown in FIG. 7, while the driving of the upstream side transporting means 9 is stopped, the lower side transporting element 18 of the downstream side transporting means 10 is lowered so that the downstream side transporting means 10 is also substantially. The driving is stopped, and the heat-sealing cutting sheet 6 is lowered so that the sheet-shaped member 1 is sandwiched between the heat-sealing cutting sheet 6 and the receiving member 7. As a result, the sheet-shaped member 1 is heat-sealed (side-sealed) by the heat-sealing cutting blade 6 as shown by the phantom line in FIG. 3, and at the same time, the intermediate portion of the adjacent heat-sealed portion is heated. The fusion cutting blade 6 cuts (burns out with heat fusion).

At this time, if the roll-shaped sheet-shaped member 1 is continuously conveyed, the sheet-shaped members 1 that are sequentially conveyed are slackened randomly in the upstream portion of the conveying means 9, and the sheet-shaped member 1 is conveyed on the subsequent conveying surface. This causes inconvenience, but the slack of the sheet-shaped member 1 is absorbed by the movable roller 13 which is urged upwardly above the slack absorbing means 11.

After the heat-sealing of the sheet-like member 1, as shown in FIG. 8, the lower conveying element 18 of the conveying means 10 on the downstream side is raised to switch the conveying means 10 to the conveying drive mode. At the same time, the upstream side transporting means 9 is temporarily switched to the reverse transporting drive mode and transporting in the reverse direction by several mm. As a result, the heat-sealed and cut heat-sealed cut portions of the sheet-shaped member 1 are separated under the same condition centering around the cut portion, and the separated heat-sealed cut portions are finished. Will be uniform. In addition, the thermal fusion cutting blade 6 is configured to be lifted after the thermal fusion cutting portions of the sheet-shaped member 1 are separated by the both transporting means 9 and 10, but both transporting means 9 and 10 are used. It is also possible to configure and implement so that the heat-fusion cutting portion of the sheet-shaped member 1 is lifted at the same time as the separation.

After the heat treatment, as described above, both the conveying means 9 and 10 are driven in a state where the heat-sealing cutting case 6 is lifted to a predetermined position, and when the sheet-shaped member 1 is conveyed over a predetermined dimension, both are conveyed. The transport means 9 and 10 are intermittently stopped and driven, and the heat-sealing cutting rule 6 is lowered to heat-seal the sheet-shaped member 1 at a predetermined position, and the heat-sealing cutting rule 6 is raised. In addition, by repeatedly driving both the conveying means 9 and 10 in the direction in which the heat-sealing cutting portions are separated from each other, the finish of the heat-sealing cutting portions, that is, the side seal portions on both side edges can be left and right. Uniform, hooked bags are automatically and efficiently manufactured.

[0024]

[Effect of device]

 As described above, according to the present invention, the separation of the heat-fusion cutting part after the heat-fusion cutting of the sheet-shaped member is performed under the same condition by a simple improved technique in which the upstream-side transportation means is configured so that the reverse transportation can be driven. This has led to the production of high-value bags with side seals on both sides that are uniform and have a good finish.

[Brief description of drawings]

FIG. 1 is a schematic side view of bag making equipment.

FIG. 2 is a vertical sectional side view of the heat fusion cutting device.

FIG. 3 is a detailed view of a thermal fusion cutting blade.

FIG. 4 is a vertical sectional side view of a conveying unit.

FIG. 5 is a plan view of a main part of a transfer unit.

FIG. 6 is an explanatory diagram showing a conveyance state of a sheet-shaped member.

FIG. 7 is an explanatory diagram of thermal fusion cutting in a state where conveyance of a sheet-shaped member is stopped.

FIG. 8 is an explanatory diagram of a state in which the heat-sealing cutting portions are moved in a direction in which they are separated from each other.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheet-shaped member, 6 ... Thermal fusion cutting blade, 7 ... Receiving member,
8 ... Thermal fusion cutting means, 9, 10 ... Conveying means.

Claims (1)

[Scope of utility model registration request] 1. A heat-sealing cutting piece over the entire width of the conveyance path is provided so as to be vertically movable in the middle of the conveyance path of the sheet member that is folded in half and on one side above and below the conveyance path. Receiving members for the fusion cutting blades are provided on the other upper and lower sides of the transport path, and intermittent driving is possible on the upstream side and the downstream side of the thermal fusion cutting means by the thermal fusion cutting sheets and the receiving members. In a heat fusion cutting apparatus for a sheet-shaped member, which is provided with the configured transporting means, the upstream-side transporting means is configured to be capable of reverse transport driving, and the heat-melting of the sheet-shaped member is stopped while driving of both transporting means is stopped. After the thermal fusion cutting by the adhesive cutting means, the thermal fusion of the sheet-shaped member is configured to be driven in a direction of separating the thermal fusion cutting parts of the sheet-shaped member from each other. Dressing and cutting device.