JPH06144629A - Carriage structure of bag in bag manufacturing machine - Google Patents

Abstract

PURPOSE:To provide carriage structure of a bag in a bag manufacturing machine capable of certainly carrying out processing of various processes while preventing turning of the bag at the time of carriage. CONSTITUTION:This is carriage structure of a bag 20 in a bag manufacturing machine constituted to carry the bag 20 to various processes by way of sandwiching the bag 20 by at least a pair of conveyor belts 30 facing to each other, and it is furnished with a through hole 41 passing through to the front and the back, an absorption belt 40 provided in parallel with the conveyor belts 30 and delivered synchronously with the conveyor belt 30, a duct 50 having an opening 51 on the back side of this absorption belt 40 and an air blowing device 60 to discharge air of this duct 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-conveying structure in a bag-making machine. The present invention relates to an improvement of a bag carrying structure in a machine.

[0002]

2. Description of the Related Art For example, in a bag-making machine for manufacturing bags as shown in FIG. 1, a step of placing an upper hook and a lower hook,
Various processes such as a process of inspecting whether upper and lower hooks are placed are provided, and the bag is transported to each process by various transport structures. Conventionally, as a transport structure for transporting a bag to various processes, there is a transport structure that includes a pair of transport belts that face each other, and that the transport belt holds the bag and transports the bag.

[0003]

However, in such a conventional conveying structure, if the portions to be processed in various steps are sandwiched by the conveying belts, the conveying belts become an obstacle and the processing cannot be performed. The part to be processed cannot be clamped by the conveyor belt. For this reason, the processed part of the bag cannot be held at all, and this part may be rolled up due to wind pressure during transportation, static electricity generated between various devices and the bag, or the like. In particular, in order to meet the recent demand for higher production speed, the transport speed is increased, and with the improvement of the quality of the material of the bag, the bag is made of a material that is sufficiently strong even if it is very thin to improve flexibility. As a result, the bag becomes easier to roll during transportation.

When the bag is curled in this manner, the processing is surely performed in various steps, for example, the hook is not placed, or even if the hook is placed, it is not placed at a desired position. Not only does it hurt
The rolled bag may get stuck in the bag-making machine and stop the entire bag-making machine, or even damage the bag-making machine in some cases. Therefore, when the bag is rolled,
We must prevent it by all means.

The present invention has been made in order to solve such a problem, and an object thereof is to prevent the occurrence of curling at the time of conveyance and to ensure the treatment of various steps. It is an object of the present invention to provide a bag transporting structure in a bag-making machine that can be performed by a simple structure.

[0006]

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. "The bag 10 is formed by at least a pair of conveyor belts 30 facing each other. Nip it and put it in various processes 140, 15
Bag making machine 1 configured to convey to 0, 160, 170
And a suction belt 40 that has a through-hole 41 penetrating the front and back sides, is arranged in parallel with the conveyance belt 30 and is fed in synchronism with the conveyance belt 30, and the back side of the suction belt 40. A duct 50 having an opening 51 in the
And a blowing device 60 for discharging the air in the duct 50.

[0007]

The bag making machine 1 of the present invention having the above structure
The transport structure of the bag 20 in 00 operates as follows.

First, when the blower 60 is operated, the duct 5
Although the air of 0 is discharged, the duct 50 has an opening on the back side of the suction belt 40, and the suction belt 40 has through holes 41 penetrating the front and back sides. Therefore, on the front side of the suction belt 40, air is sucked from the through-hole 41 of the suction belt 40. When the bag 20 is placed on the front side of the suction belt 40, the bag 20 is attached to the suction belt 40. Will be adsorbed.

Next, the bag 20 is sandwiched between at least a pair of opposed conveyor belts 30 and conveyed.
A suction belt 40 is arranged in parallel with the transport belt 30,
The suction belt 40 is sent in synchronization with the conveyor belt 30. Therefore, the bag 20 is always sucked by the suction belt 40 and conveyed by the conveyance belt 30, and the portion sucked by the suction belt 40 is prevented from being curled up by wind pressure, static electricity, or the like during conveyance. .

[0010]

EXAMPLE Next, the bag 20 in the bag making machine 100 of the present invention.
An example of the transport structure of 1 will be described in detail with reference to the drawings.

In this embodiment, as shown in FIG.
An example in which the carrying structure of the present invention is applied to a bag-making machine 100 that manufactures a sheet-shaped bag 20 formed of a highly flexible material such as vinylon, polypropylene, or another synthetic resin, paper, cloth, or the like will be described.

This bag making machine 100, as shown in FIG.
A tubing step 110 for forming a tubular sheet by folding one sheet of raw sheet material 10 and adhering its ends, or by making two original sheets 10 face each other and adhering their ends. Sumi-cutting step 120 for cutting the upper portion of the bag 20 into a desired shape, flying cutting step 130 for cutting the tubular sheet into the shape of the single bag 20 and adhering the bottom portion of the bag 20, upper end of the cover material 25 of the bag 20 Lower hook placing step 140 for folding the lower hook 22 and placing the lower hook 22, upper hook placing step 150 for folding the upper end of the backing 26 of the bag 20 and placing the upper hook 21, upper hook 2
Inspecting step 16 for inspecting whether or not the lower hook 22 and the lower hook 22 are reliably placed, and selecting the defective product 24 from the good product 23
0, and each step of the unloading step 170 for unloading the non-defective product 23. Then, the transport structure of the present invention is adopted as a transport means for the bags 20 formed from the flying cut process 130 formed on the single bag 20 to the carry-out process 170.

The bag 20 made into a single body by the flying cutting process 130 is, as shown in FIG.
Placed on 3. Then, when the upper first conveyor 31 disposed on the upper side of the lower conveyor 33 and tilting at a predetermined interval (arrow A in FIG. 3) descends, the conveyor belt 30 of the lower conveyor 33 and the conveyor belt 3 of the upper first conveyor 31 are moved.
It is sandwiched by 0 and conveyed toward the upper second conveyor 32. Here, the lower conveyor 33 and the upper second conveyor 3
In No. 2, the feeding of the respective conveyor belts 30 is stopped at predetermined time intervals, and when the conveyor belt 30 is stopped, the bag 20 is stopped at each process position. In addition,
As the conveyor belt 30, a toothed belt having a tooth profile formed on the back surface is adopted so that slippage does not occur in the feeding of the conveyor belt 30.

As shown in FIG. 4, the suction belt 40 is arranged in parallel with the conveyor belt 30 of the lower conveyor 33, and the bag 2
The upper part of 0 is placed on the suction belt 40. The through hole 41 of the suction belt 40 is provided in the portion where the bag 20 is placed, so that the suction efficiency is further improved. The suction belt 40 also employs a toothed belt, like the transport belt 30, so that the suction belt 40 can be reliably fed in synchronization with the transport belt 30. Then, on the back side of the suction belt 40, a duct 50 having a substantially U-shaped cross section and having an opening 51 on the back side of the suction belt is provided. The lower portion of the duct 50 communicates with the blower device 60. is there. The suction force of the suction belt 40 can be easily adjusted by adjusting the air volume of the blower 60.

Incidentally, the lower hook driving step 140 of this embodiment.
In FIG. 5, as shown in FIG. 5, the surface material 25 of the bag 20 is adsorbed to the adsorption pad 141 to float, and the floated portion is folded and the lower hook 22 is placed. Since the backing material 26 is attracted to the suction belt 40, the front material 25 and the backing material 26 can be reliably separated even when the front material 25 and the backing material 26 are attached to each other due to static electricity or the like. Therefore, the lower hook driving step 140 can be surely processed.

As described above, in this embodiment, the single bag 20 is used.
An example was shown in which a pair of conveyor belts 30 are sandwiched in the horizontal direction, one suction belt 40 is disposed below the bag 20, and the bag 20 is conveyed in the horizontal direction. However, the present invention is not limited to this. For example,
A single or a plurality of connected sheet-like bags 20 is vertically sandwiched by a pair of conveyor belts 30, and a plurality of suction belts 40 are arranged on one or both sides of the bag 20 to make the bags 20 vertical. It may be transported to the. Also, various processes 130, 140, 150, 160, 170 for manufacturing the bag 20.
Is of course not limited to this embodiment.

[0017]

As described in detail above, in the bag conveying structure of the bag making machine of the present invention, the suction belts for adsorbing the bags are arranged in parallel on the pair of conveying belts that sandwich and convey the bags. The suction belt is sent in synchronization with the conveyor belt.

Therefore, according to the present invention, it is possible to prevent the roll-up from occurring during the transportation, and to carry out the processing of various steps with certainty. Can be provided by.

Further, when the step of peeling the front material and the backing material of the bag is included by, for example, a suction pad, there is an effect that the front material and the backing material can be reliably peeled off.

[Brief description of drawings]

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

FIG. 2 is a plan view showing an example of steps of the bag making machine.

FIG. 3 is a front view showing an example of a conveyor belt.

FIG. 4 is a partial perspective view showing an embodiment of a bag conveying structure in the bag making machine of the present invention.

FIG. 5 is a sectional side view showing a lower hook driving step.

[Explanation of symbols]

 10 original sheet material 20 bag 21 upper hook 22 lower hook 23 good product 24 defective 25 surface material 26 backing material 30 conveyor belt 31 upper first conveyor 32 upper second conveyor 33 lower conveyor 40 adsorption belt 41 through hole 50 duct 51 opening 60 Air blower 100 Bag making machine 110 Tubing process 120 Sumi cutting process 130 Flying cutting process 140 Lower hook placing process 141 Adsorption pad 150 Upper hook placing process 160 Inspection process 170 Outgoing process

Claims (1)

[Claims] 1. A bag conveying structure in a bag-making machine configured to sandwich a bag between at least a pair of opposed conveyor belts and convey the bag to various processes, which has through holes penetrating the front and back sides. A suction belt arranged in parallel with the conveyor belt and fed in synchronism with the conveyance belt; a duct having an opening on the back side of the suction belt; and a blower for discharging air from the duct. Conveying structure of bag in bag making machine.