JPH0911331A - Spout welding equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a spout welding device that inserts and welds a spout into a bag body formed of a film to form a container. [Structure] A widening device 3 for widening the opening 1A of the bag 1 in the thickness direction of the bag, and a spout insertion for placing the spout 2 at a predetermined position in the widened opening 1A of the bag. The spout insertion device 10 is provided with a device 10 and a welding device for welding the spout and the opening, and the spout insertion device 10 has a pair of members 17 that can move the legs in the opening 1A to both ends in the width direction of the bag. , A clamp body 18 having a pair of fingers 19 and 19 that can be opened and closed to grip the spout, and the spout insertion device 1
0 indicates the pair of members 17, 1 of the widening body 16 at the forward position.
After the leg 7 is opened, the pair of fingers 19, 19 of the clamp body 18 are opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spout welding apparatus in which a spout is inserted into an opening of a bag formed of a resin film, and the spout is welded and attached.

[0002]

2. Description of the Related Art In a plastic container, usually, a cylindrical resin material called a parison is placed in a mold that can be opened and closed, and air is blown into the parison in a heated state so that the parison comes into close contact with the inner surface of the mold. It is made by blow molding in which it is inflated and molded into a predetermined shape. According to this blow molding, the container body and the spout are integrally formed.

[0003]

According to the above-mentioned blow molding, since the container body is relatively thick and requires many materials, there is a problem in saving resources, and the container is disposed of after use. Also has a problem with.
In addition to this, the mold that gives the shape to the entire container must have at least the size of the container, and must have an inner surface that is the same shape as the outer surface of the container, especially for large containers or complicated outer surface shapes. In the case of a container, there is also a problem that the cost for manufacturing the mold increases. Further, when it is necessary to slightly change the size of the container or to change a part of the shape, it is necessary to change the entire mold, which causes the problem.

The present invention solves the above-mentioned problems in conventional containers, forms a bag with a resin film which is inexpensive and easy to dispose, and welds a spout serving as a spout to the bag to obtain a container. The purpose is to provide.

[0005]

According to the present invention, the above object is to provide an opening in a bag body formed of a resin film,
In a device for inserting a spout having tapered ends at least near both ends of the opening and attaching the spout by welding to the opening of the bag, the opening of the bag is attached to the bag. The expansion device that expands in the thickness direction of the
A spout insertion device that holds the spout and disposes the spout at a predetermined position in the opening of the bag body, and a welding device that welds the spout and the opening,
The spout insertion device is provided between a widening body having a pair of members capable of open leg movement to both end positions in the width direction of the widening body in the opening of the widened body, and a pair of members of the widening body. And a clamp body having a pair of fingers that can be opened and closed to grip the spout, and the spout insertion device is configured such that the distal end portions of the pair of members of the widening body enter into an opening portion of the widened body to clamp The spout grasped at is movable to the forward position where the spout is arranged in the opening, and the pair of fingers of the clamp body are opened after the pair of members of the widening body are opened at the forward position. It is achieved by becoming.

[0006]

According to the present invention, first, the opening of the bag is expanded in the thickness direction of the bag by the expansion device. The spout inserting device for holding the spout moves toward the expanding device, and after the tips of the pair of members of the widening body enter into the opening of the bag body, separate toward the both ends in the width direction of the opening. Move to form the spout insertion space,
After that, the spout held by the pair of fingers of the clamp body enters into the insertion space of the opening and is arranged at the edge position of the opening. The spout is temporarily fixed to a part of the bag body, the spout inserting device is retracted toward the original position, and the widening body is completely out of the opening. Then, the spout and the opening of the bag are welded by the welding device, and thus the container is completed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a bag 1 and a spout (spout member) 2.
It is a perspective view showing the relationship with.

The bag body 1 is formed of a resin film. In the case of the illustrated example, two films are cut so as to form the outer shape of the bag body, and the peripheral edge except the opening 1A is welded to the bag body. I'm body 1. Opening 1 of this bag 1
A is expanded by a expanding device 3 such as a suction cup, and the spout 2 is inserted therein and then welded and attached to form a container.

The spout 2 is formed by molding resin and integrally has a shoulder portion 4 and a spout portion 5 whose both ends are tapered. In the illustrated example, the shoulder 4 has a convex lens shape in plan view, but the present invention is not limited to this, and it is sufficient if both ends 4A are tapered. A substantially cylindrical spout 5 formed in the center of the shoulder 4 has two flanges 5A, 5A and a screw 5B on the outer peripheral surface. The screw part 5
A cap 6 having a female screw on its inner surface can be screwed into B.

In the device of this embodiment shown in FIGS. 2 and 3, the spout insertion device 10 is held in an expanded state by a pair of abutting members 11 provided at a stationary position and the expansion device 3. It is composed of a main body 12 which is movable in the direction of arrow A so that it can be brought into and out of contact with the bag body 1. The reciprocating movement of the main body 12 in the A direction is performed at a cycle determined by a cylinder device (not shown).

The main body 12 includes a widening member 16 composed of a pair of bar members 17, 17 and a pair of fingers 19, 19 by four pins 14, 14 and 15, 15 provided on two parallel substrates 13. A clamp body 18 composed of is rotatably supported. The bar members 17 and 17 and the fingers 19 and 19 are all bent and formed in a V-shape, and the pins 14, 14 and 1 are bent at the bent portions.
It is supported by 5,15.

The bar members 17, 17 of the widening body 16 have the tips 17A, 17A of the bar members 17, 17 whose opening portions 1A of the bag body 1 when the main body 12 advances toward the bag body 1 by a predetermined distance. It has a length that allows it to enter inside, and the rear end 17
B and 17B are bent outward so as to contact the contact member 11 in the stationary position.

The fingers 19 and 19 of the clamp body 18 are formed to be bent substantially parallel to the bar members 17 and 17 of the widening body 16 which can be bent. It is shorter than the tip of 17. Rear ends 19B, 19 of the fingers 19, 19
B is positioned so as to face the rear end portions of the bar members 17 and 17, and compression springs 20 and 20 are arranged between them. The tip portions 17A, 17A of the bar members 17, 17 are rotated inward so as to reduce the distance between them by the force of the compression springs 20, 20, but they are parallel to each other by a stopper (not shown). Further rotation is restricted at a position which is rotated slightly inward from the position. Gears 21 and 21 that mesh with each other are attached to the fingers 19 and 19, and a motor 22 that reciprocates by a predetermined angle at a predetermined time is attached to one gear 21. Therefore, the reciprocating rotation of the motor 22 causes the tip ends 19A and 19A of the fingers 19 and 19 to perform the open / close leg operation.

Next, the operation of this embodiment will be described with reference to FIG.

As shown in the state (A) of FIG. 4, the spout 2 supplied from a spout supply device (not shown) is
Clamp body 18 closed by the rotation of the motor 22
It is held by a pair of fingers 19, 19. At this time, the pair of bar members 17, 17 of the widening body 16 are substantially parallel to each other, or the tip portions 17A, 17A are slightly inwardly in contact with a stopper (not shown).

Next, the main body 12 that supports the bar members 17, 17 of the widening body 16 and the fingers 19, 19 of the clamp body 18 on the base plate 13 is expanded by the expansion device 3 in the thickness direction of the bag body 1. It moves toward the opened opening 1A (see the state (B) in FIG. 4).

When the main body 12 reaches a predetermined position, the rear end portions 17B and 17B of the bar members 17 and 17 of the widening body 16 come into contact with the abutting members 11 and 11 and enter the opening 1A of the bag body 1. The tip portions 17A, 17A of the bar members 17, 17 move away from each other toward both ends (outside) of the opening 1A,
An insertion space for the spout 2 is secured, and the spout 2 is inserted therein (see the state (C) in FIG. 4).

Next, the bag body 1 and the spout 2 are temporarily fixed by spot welding or holding pressure by a member (not shown), and then the fingers 19 and 19 are opened by the operation of the motor 22, so that the spout 2 is held in the bag body. The main body 12 returns to its original position with the bar member 17, 17 and the fingers 19, 19 left outside the bag body 1 while being arranged in the opening of the bag 1. At that time, the pair of bar members 17, 17 is moved by the force of the spring 20 to cause the tip portion 1 to move.
7A and 17A have returned to almost parallel positions (Fig. 4).
State (D)).

Then, at the position where the spout S is arranged, a welding tool (not shown) moves close to the surface of the bag body 1 and presses the opening 1A against the side surface of the spout 2 to perform heat welding or ultrasonic wave. Welding is done and thus a container is obtained.

According to the present invention, after the clamp body is supplied with the spout from the spout supply device, the widening body is inserted into the opening portion which has already been widened in the thickness direction of the bag body by the widening device, and the member is widened. The spout insertion space is secured by moving the spout in this direction, the spout held by the clamp body is inserted therein, and then the spout is welded.There is no limitation on the spout supply device or the welding device. Absent.

[0022]

As described above, according to the present invention, the opening of the bag body is expanded in the width direction by the widening body to secure the spout insertion space, and the spout is inserted therein. The spout can be easily inserted even with a bag having a narrow end. As a result, it becomes possible to obtain a container by forming a bag with a film and inserting and welding a spout, which saves material and money at the time of manufacturing compared to conventional thick containers made by blow molding. This has the effect of reducing the cost of the mold and facilitating disposal after the container has been used.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a relationship between a bag body and a spout targeted by the present invention.

FIG. 2 is a perspective view showing a schematic configuration of the device of this embodiment.

3 is a front view of the spout insertion device in FIG. 2. FIG.

FIG. 4 is a diagram showing a step of inserting a spout using the apparatus shown in FIG.

[Explanation of symbols]

 1 Bag 1A Opening 2 Spout 3 Expander 10 Spout Inserting Device 16 Wider 17 Member of Wider 17A Tip 18 Clamp 19 Finger

Claims (2)

[Claims] 1. A spout having a tapered end located at least near both ends of the opening is inserted into the opening of the bag formed of a resin film, and the spout is opened into the opening of the bag. A device for welding and attaching to a portion of the bag, the device for expanding the opening of the bag in the thickness direction of the bag, and a predetermined position in the opening of the bag for holding the spout. And a welding device for welding the spout and the opening, wherein the spout insertion device is located at both end positions in the width direction of the bag in the opening of the expanded bag. The spout insertion device is provided with a widening body having a pair of members that can be moved to open legs, and a clamp body having a pair of fingers that are between the pair of members of the widening body and that can be opened and closed to grip the spout. , The above expansion The tips of the pair of members of the width body enter into the widened opening, and the spout held by the clamp body is movable to the forward position where the spout is arranged in the opening. The spout welding apparatus is characterized in that the pair of fingers of the clamp body are opened after the pair of members of the widening body are opened. 2. A spout insertion device according to claim 1, wherein a pair of members of the widening body and a pair of fingers of the clamp body are rotatably supported at an intermediate portion, and a compression spring is provided between the members and the fingers adjacent to each other. And a contact member for contacting a part of the pair of members of the widening body and causing the pair of members to open when the spout insertion device moves to the forward position is provided at the stationary position. The spout welding device according to claim 1.