JPS6224519Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention involves transporting a continuous synthetic resin film along one or more guide plates while bending both sides, and then cutting the central part lengthwise. This relates to a bag making machine that manufactures two bags at a time by welding and welding them in the lateral direction.

Conventional technology In this type of conventional bag making machine, when guiding the film to fold both sides, it is very slippery, and the guide plates used for folding both sides are arranged horizontally, making it difficult to hold the film almost horizontally. The problem was that the device was long and required a large space to be transported.

Problems to be Solved by the Invention This invention provides a bag making machine which can prevent the film from sliding along the guide plate and which requires less space.

Means to Solve the Problem This invention involves transporting a continuous synthetic resin film along one or more guide plates while bending both sides, then cutting the central part lengthwise and fusing it laterally. The bag making machine produces two bags at a time by welding, and the surface of the guide plate is made of cloth, and the guide plate is arranged almost vertically so as to transport the film upward. The present invention provides a bag making machine characterized by extending in the direction of the present invention.

Function When the surface of the guide plate is made of cloth, it can apply an appropriate frictional force to the film, significantly preventing the film from slipping, and also provides a buffer to prevent damage to the film. Furthermore, the guide plate extends substantially vertically and guides the film upward, allowing the bag making machine to be installed even in a narrow space.

Embodiment An embodiment of this invention will be described below with reference to the drawings.

In one embodiment of the invention shown in the figure, 10 is a main body, 11 is a roll rotatably supported with respect to the main body, and 12 is a synthetic resin film wound around this roll. This film can be sent out in a stretched state by passing it along a plurality of guide rolls 13 that are rotatably supported with respect to the main body 10.

Reference numeral 15 denotes a pair of guide plates that extend substantially vertically and are arranged at appropriate intervals and together constitute a guide means for guiding the film 12 to be folded. It is covered with a cloth 17, and the lower end of each guide plate is covered with a film 1.
2 is curved in the direction in which it comes. Cloth 17
This applies an appropriate frictional force to the film 12 to prevent it from slipping, and also cushions the film 12 to prevent damage. Therefore, any kind of cloth may be used as the cloth 17, but a thick one is preferable, and rashers or flannel are particularly preferred because they do not damage the film 12 and prevent slippage. be. 18 is a support plate provided upright on the main body 10, 20 is a pair of support members extending horizontally from this support plate, and 21 is a pair of parallel guide rods with both ends fixed between the support members 20. . Reference numeral 22 denotes a threaded rod which is disposed parallel to these guide rods and rotatably supported at both ends by the support member 20, and a handle 23 is fixed to one outer end. 25 is a threaded rod 2 that passes through each guide rod 21;
2 is a movable member that can be moved laterally by operating the handle 23. The threaded rod 22, the handle 23, and the movable member 25 constitute adjustment means. Reference numeral 26 denotes a mounting plate, which is attached to the movable member 25 so as to be adjustable in the vertical direction by a pair of screws 30 that are vertically bored in a protrusion 27 extending rearward from the center and pass through elongated holes 28. Reference numeral 31 indicates a pair of screws protruding from each guide plate 15 toward the rear, and reference numeral 32 indicates a pair of elongated holes extending horizontally on both sides of the mounting plate 26, through which the screws 31 pass. 3
Reference numeral 3 designates a nut for fixing each guide plate 15 to the mounting plate 26 so that the distance between each guide plate 15 can be adjusted by screwing each screw 31 through the long hole 32 and tightening the nut. .

The film 12 is arranged along the front side of each guide plate 15 and is bent along the outer edge of the guide plate 15 so that the folded part is along the rear side of each guide plate 15 so as to move upward. You will be guided towards the destination. Reference numeral 35 designates a pair of guide rods attached to the support plate 18 so as to guide the bending of the film 12 on both sides. A trochanter 36 presses the bent portion of the film 12 along the rear side of each guide plate 15, and is rotatably supported at the tip of a support rod 37 attached to the support plate 18. A roll 38 guides the rising film 12 downward while being bent along the guide plate 15 to form bent portions 40 on both sides.

Reference numeral 41 denotes a pair of guns (respectively) for discharging from a nozzle 45 a hot melt adhesive having pressure-sensitive adhesive properties after solidification, which is supplied via a hose 43 from a melting tank 42 provided on the main body 10 for heating and melting the hot melt adhesive. (only one of which is shown) is supported against the main body 10 to form two longitudinal pressure-sensitive adhesive sections 46 between the folds 40 of the film 12 along the roll 38. There is. The melting tank 42, gun 41, and hose 43 together constitute a hot melt fusing device. One melting tank 42 may be provided in common for the two guns 41. Reference numeral 47 denotes a pair of substantially cylindrical pressing members made of synthetic resin whose width is expanded by pressing each pressure-sensitive adhesive part 46, and each of which is fixed to a shaft 48 that is rotatable with respect to the main body 10. They are fixed to the distal end of the support member 50 with screws 51, and are pressed with appropriate pressing force by springs 53, respectively. If the pressing surface of each pressing member is worn out, the screw 51
By loosening and rotating it, it is possible to maintain a nearly cylindrical shape at all times. 55 is main body 1
It is wound around a pair of reels 57 (only one of which is shown) rotatably mounted on a shaft 56 fixed relative to 0, and taken out by a guide roll 58 so as to overlap each pressure-sensitive adhesive part 46. It is a release tape made of paper or synthetic resin film. 60 is a rubber roll that is continuously driven by a power (not shown), and 61 is a rubber roll that is pressed from above. The film 12 is continuously fed out by these rolls 60 and 61.

The film 12 that is continuously fed out by the rolls 60, 61 is guided by the guide rolls 62, 63, 64, 6.
A rubber roll 6 that is intermittently driven via 5
6 and a rubber roll 67 that presses from above, and is fed out intermittently. Therefore, in order to maintain the stretched state of the film 12 at all times, the rolls 62 and 64 are supported by a movable frame 68 rotatably attached to the main body 10, and are moved up and down by the rotation of this movable frame. There is. Reference numeral 70 denotes a cutting member consisting of a blade that automatically cuts the central portion of the film 12 between the roll 65 and the rolls 66, 67 by moving the film into two parts.

Reference numeral 71 denotes a welding member 71 which descends when the rolls 66 and 67 are stopped, welds the film 12 in the transverse direction and welds both sides, and then ascends. Therefore,
Two bags 90 are obtained in one operation. 7
Reference numeral 2 denotes a pedestal; 73 is made of silicone rubber; it passes between the welding member 71 and the pedestal 72, stops when the film 12 is fused and welded, and then is intermittently driven to form the bag 90;
The endless belt 75 that moves the bag 90 is an endless belt that pinches the bag 90 sent from the endless belt from above and below and sends it out.

In the configuration as described above, when the bag 90 is manufactured from the film 12, the film 1
Even if the widths of the two bent portions 40 are initially equal, they gradually become different. In such a case, the handle 23 may be rotated to simultaneously move each guide plate 15 to the side where the width of the bent portion 40 is longer. Further, when the width of the film 12 or the width of the bent portion 40 needs to be changed, the distance between the guide plates 15 can be changed by loosening the nut 33.

Various modifications can be made to this invention. For example, only one guide plate 15 may be used to form the bent portion 4 with a predetermined width determined by the width of the film 12.
0 may be formed, and the guide plate 15
A plurality of these may be provided on both sides in the moving direction of the film 12. Further, the surface of the guide plate 15 that is in contact with the film 12 may be covered with cloth 17, and the plate 16 may be made of other materials such as synthetic resin or wood in addition to metal.
The cutting member 70 may be a blade-shaped member that is placed at a predetermined position and cuts the film 12 as it advances, as shown in the figure, or a blade that descends from above to cut the film 12 when it is stopped. It is also possible to use a blade body that is fused or cut by heating.

Effects of the invention In this invention, since the surface of the guide plate 15 that guides the bending of both sides of the film 12 is made of cloth 17, it is possible to apply an appropriate frictional force to the film 12 and prevent the film 12 from slipping. , and film 1
2. The bent portion 40 can be formed in such a manner as to buffer the movement of 2 and prevent damage. Furthermore, since the guide plate 15 extends substantially in the vertical direction, the length of the device for forming the folded portion 40 on the film 12 in the front-back direction is shortened, and less space is required for installation.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the rear side of an embodiment of this invention, Fig. 2 is a side view showing the front side, Fig. 3 is a rear view showing the main parts, and Fig. 4 is a plan view thereof. 5
The figure is a longitudinal sectional view of a part of the guide plate, and FIG. 6 is an explanatory view showing the process of manufacturing a bag from a film. 10 is the main body, 12 is the film, 15 is the guide plate,
17 is cloth, 21 is a guide rod, 22 is a threaded rod, 23 is a handle, 25 is a movable member, 26 is a mounting plate, 35
36 is a guide rod, 36 is a trochanter, 38 is a roll, 40 is a bending part, 41 is a gun, 42 is a melting tank, 46 is a pressure sensitive adhesive part, 55 is a tape, 70 is a cutting member, 71
90 is a bag.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A continuous synthetic resin film is transported along one or more guide plates while bending both sides, and then the central part is cut in the longitudinal direction and welded and welded in the transverse direction. A bag making machine that manufactures two bags at a time, wherein the surface of the guide plate is made of cloth, and the guide plate is arranged in a substantially vertical direction so as to transport the film upward. A bag making machine that is characterized by being elongated. 2. The bag making machine according to claim 1 of the utility model registration claim, further comprising a guide roll that guides the film that has passed through the guide plate in a downward direction;
It is characterized by including a hot melt fusing device equipped with guns for discharging a hot melt adhesive capable of obtaining pressure-sensitive adhesive properties after solidification from above on both sides of the central portion toward the film guided by the roll. Bag making machine.