JPH0542905A - Apparatus for making and filling bag, and packing - Google Patents

Abstract

PURPOSE:To shorten the length in the size of the lengthwise sealing machine independent of the vertical length of the bag produced. CONSTITUTION:Simultaneously with intermittent feeding of a web W by a paying-off part, a metal belt 1, which is being heated by a heater 2, is pressed to be put in contact with a tube-forming body T by the pressing action of a contact-withdrawal-controlling drive part 4 while being moved in the direction of the feeding of the web W. The web W undergoes heat-melt adhesion as it travels between the outer side of the tube-forming body T and the metal belt 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a vertical sealing machine on the outer surface of a tube molded body so that the vertical sealing machine can be moved in and out of the tube molded body, and the web is wound around the tube molded body by an intermittent operation of a feeding portion to form a vertical seal. The present invention relates to a bag-making filling and packaging apparatus that hangs down while forming a tubular shape by a machine and fills a bag body made of this tubular web with an article to be packaged.

[0002]

2. Description of the Related Art Conventionally, as a bag-making filling and packaging apparatus of this type, for example, a vertical sealing machine has a flat plate shape that is long in the feeding direction of a web that generates heat when energized, and its longitudinal dimension is the same as the vertical dimension of a bag body. After the web is unrolled by a predetermined amount due to the intermittent operation of the unwinding part, the vertical sealing machine is brought into contact with the tube molded body side to press it against the web to heat the overlapping parts on both sides of the web. There is one that is worn to make a tube for one bag.

[0003]

However, in such a bag-making filling and packaging apparatus, since the longitudinal dimension of the vertical sealing machine changes in accordance with the vertical dimension length of the bag body, the vertical dimension of the bag body is changed. Longer, the longitudinal dimension of the vertical sealing machine must be increased, and only the vertical sealing machine becomes larger than other tube moldings and feeding parts, and as a result, the entire apparatus becomes large and the cost increases. There is a problem.

Further, for example, when the feeding speed of the web is high or due to the material of the web, when the web is intermittently fed, friction is generated between the web and the outer surface of the molded tube, so that wrinkles can be generated in the feeding direction. However, there is a problem in that this wrinkled state is heat-sealed by a vertical sealing machine and the sealing property is significantly lowered.

In view of such conventional circumstances, the present invention aims to shorten the longitudinal dimension of the vertical sealing machine regardless of the vertical dimension of the bag body, and another object is to perform vertical sealing without causing wrinkles. To do.

[0006]

In order to solve the above-mentioned problems, the technical means of the present invention is that a vertical sealing machine winds an annular metal belt in parallel with the outer surface of a tube-molded body so that the belt can move freely. , This metal belt is moved in the feeding direction of the web at the same speed as the operating speed of the payout part, and a heater for heating the metal belt is provided so that the metal belt is intermittently operated with respect to the outer surface of the tube forming body. It is characterized in that a contact / separation drive unit for contacting is provided in series.

Further, it is preferable to provide a pressure contact surface movably in the feeding direction of the web at a position facing the metal belt on the outer surface of the tube molded body.

[0008]

According to the above technical means, while the metal belt is being heated by the heater, the metal belt is moved intermittently at the same time as the web is intermittently fed by the feeding portion, and the metal belt is pressed against the tube formed body in the feeding direction. By moving the web, the web is sandwiched between the outer surface of the tube formed body and the metal belt and is fed out and heat-sealed.

Then, as the metal belt pressed against the web moves and the web is unwound by the unwinding part, the pressure contact surface is moved in the unwinding direction, so that the web is sandwiched between the metal belt and the pressure contact surface. As it is,
It is a smooth one.

[0010]

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

In this embodiment, as shown in FIGS. 1 and 2, a vertical sealing machine A is provided on the outer surface of a tube molding T via a web W.
The metal belt 1 of FIG.
An annular belt 6 serving as a pressure contact surface C is wound around the outer surface of the tube formed body T so as to face the metal belt 1 so as to be movable in the unwinding direction of the web W.

The metal belt 1 is, for example, a steel belt or the like in which a bendable strip-shaped plate made of a metal having excellent heat conductivity is connected in an annular shape, and is a drive pulley which is axially attached to the support 1a at a distance in the feeding direction. 1b and driven pulley 1c
The straight portion 1d facing the outer surface of the tube molded body T is wound in parallel with the outer surface and is heated by the heater 2, and the drive pulley 1b is rotated by the rotary driving portion 3
To work together.

The heater 2 has a conventionally known structure which generates heat when energized. In the case of this embodiment, two heaters 2 each having a belt-shaped heating surface 2a formed in a straight line are provided inside the metal belt 1. One on the outside of the metal belt 1 is arranged so as to face both of the straight portions 1d and 1e of the metal belt 1 so as to face each other. Between the two heaters 2 and 2 on the inside of the metal belt 1, there is elasticity such as a leaf spring. When the body 2b is erected and the metal belt 1 shown in FIG. 1 is separated, the linear portion 1d of the metal belt 1 is slightly projected to the tube molded body T side.

The rotation driving unit 3 moves the metal belt 1 in the feeding direction at the same speed as the operating speed of the feeding unit B. In the case of the present embodiment, for example, a motor separate from the driving source of the feeding unit B is used. The drive pulley 1b is constantly rotated at a constant speed.

Further, the support 1a of the metal belt 1 is provided with the metal belt 1 on the outer surface of the tube molding T.
Contact / separation drive unit 4 that is moved only when the feeding unit B is intermittently operated.
To line up.

The contact / separation drive section 4 is, for example, an air cylinder whose operation is controlled based on the intermittent operation of the feeding section B, and at the same time when the intermittent operation of the feeding section B is started, the support 1a is provided.
To the tube molded body T side to press the linear portion 1d of the metal belt 1 against the web W, and at the same time when the intermittent operation of the feeding section B ends, the support body 1a is moved away from the tube molded body T side. The straight portion 1d of the belt 1 is separated from the web W.

On the other hand, on the outer surface of the tube molded body T, a concave portion T1 is provided at a position facing the linear portion 1d of the metal belt 1, and a pair of driven pulleys 5 and 5 are separated in this concave portion T1 in the feeding direction. And the driven pulleys 5 and 5, and an annular belt 6 made of a metal such as steel or a heat-resistant rubber having excellent heat resistance is wound around the driven pulleys 5 and 5 so as to be movable in the payout direction. The straight portion 6a facing the metal belt 1 is slightly projected from the outer surface of the tube molded body T toward the metal belt 1 side.

Between the driven pulleys 5 and 5, a plurality of rollers 5a having the same diameter as the driven pulleys 5 are axially mounted at equal intervals in the feeding direction, and when the metal belt 1 is driven, the linear belt of the annular belt 6 is linearly moved. In order to prevent the portion 6a from bending and deforming in the contact direction, in the present embodiment, the driven pulleys 5 and the rollers 5a are axially attached to the support frame 7 having a U-shape in plan view, and then the support frame 7 is attached. It is fitted in the recess T1 on the outer surface of the tube molded body T.

Next, the operation of the bag-making filling and packaging apparatus will be described.

First, when the feeding portion B is inoperative, as shown in FIG. 1, the support 1a is moved away from the outer surface of the tube molded body T by the contact / separation drive portion 4, and the linear portion 1d of the metal belt 1 is moved.
The web W does not come into contact with the web W, and the metal belt 1 is moved at a constant speed by the rotation driving unit 3 to heat the entire metal belt 1 to a uniform temperature.

From this state, when the intermittent operation of the feeding section B is started and the web W starts to be fed, at the same time, the supporting member 1a is brought into contact with the tube molded body T side by the contacting / separating driving unit 4, As shown in FIG. 4, the linear portion 1d of the metal belt 1 is pressed against the linear portion 6a of the annular belt 6 via the web W.

At this time, the heater 2 inside the metal belt 1
Due to the elastic body 2b interposed between the two, the entire linear portion 1d of the metal belt 1 comes into contact with the linear portion 6a of the annular belt 6 while cushioning, and along with the movement of the metal belt 1 and the feeding of the web W of the feeding portion B, The annular belt 6 moves in the feeding direction.

Therefore, the web W is sandwiched between the straight portion 1d of the metal belt 1 and the straight portion 6a of the annular belt 6, and is unwound and thermally fused by the heat of the metal belt 1.

After that, when the web W is fed out by a predetermined amount and the intermittent operation of the feeding portion B is completed, the supporting member 1a is separated from the tube molding T by the contacting / separating driving portion 4 at the same time, and again shown in FIG. As shown, the linear portion 1d of the metal belt 1 separates from the web W.

After that, the above-described operation is repeated.

Further, FIG. 5 shows another embodiment of the present invention, which is a pressure contact surface C at a position facing the metal belt 1 on the outer surface of the tube molded body T at regular intervals in the feeding direction. A large number of rollers 8 are provided so as to be rotatable in the feeding direction.

These many rollers 8 are respectively axially mounted in the recesses T1 formed in the outer surface of the tube molded body T, and the tips of the rollers 8 facing the straight portions 1d of the metal belt 1 are respectively attached to the tubes. While slightly protruding from the outer surface of the molded body T toward the metal belt 1 side, the molded body T is arranged on a straight line parallel to the linear portion 1d of the metal belt 1, and the outer diameter of each roller 8 and the distance between each roller 8 are reduced. The portion that does not come into pressure contact with the web W when the metal belt 1 is moved is made as small as possible.

Further, in this embodiment, each roller 5a is axially attached to the support frame 7 having a U-shape in plan view, and then the support frame 7 is formed.
Is fitted in the recess T1 on the outer surface of the tube molded body T, and an elastic body 9 such as a spring is installed between the support frame 7 and the recess T1, so that the rollers 8 ... The whole is surely brought into contact with the straight portion 1d of the metal belt 1.

In the embodiment shown above, the heater 2 is partially arranged close to the metal belt 1, and the metal belt 1 is moved at a constant speed by the rotation drive unit 3 which is separate from the drive source of the feeding unit B. Although the entire metal belt 1 is heated to a uniform temperature, the present invention is not limited to this. For example, the entire metal belt 1 is heated to a uniform temperature without moving, and the drive source of the feeding section B and the drive pulley 1b are linked. The metal belt 1 may be moved only during the intermittent operation of the feeding section B.

The arrangement position of the contact / separation drive unit 4 is not limited to that shown in the figure, and may be anywhere as long as the same operation is performed.

[0031]

Since the present invention has the above-mentioned structure, it has the following advantages. 1. While heating the metal belt with a heater, at the same time as intermittent feeding of the web by the feeding unit,
By moving the metal belt in the feeding direction while pressing it against the tube molded body, the web is sandwiched between the outer surface of the tube molded body and the metal belt and heat-fused while being fed, so that the bag body It is possible to shorten the longitudinal dimension of the vertical sealing machine regardless of the vertical dimension of.

Therefore, as compared with the conventional one in which the longitudinal dimension of the vertical sealing machine changes according to the vertical dimension of the bag body, the longitudinal dimension of the vertical sealing machine remains constant even if the vertical dimension of the bag body becomes long. As a result, the size of the entire apparatus does not increase, and the cost can be reduced.

2. The movement of the metal belt pressed through the web and the movement of the pressure contact surface in the unwinding direction along with the unwinding of the web at the unwinding portion allow the web to be smoothed while being sandwiched between the metal belt and the pressure contact surface. Since it is extended to, it can be vertically sealed without wrinkles.

Therefore, during intermittent feeding of the web, due to the friction generated between the web and the outer surface of the tube molded body,
The sealing property is improved as compared with the conventional one in which the web is longitudinally sealed with wrinkles in the feeding direction.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional front view of a bag-making filling and packaging apparatus according to an embodiment of the present invention, showing a state in which a vertical sealing machine is separated.

FIG. 2 is a cross-sectional plan view taken along line 2-2 of FIG.

FIG. 3 is a vertical sectional side view taken along line 3-3 of FIG.

FIG. 4 is a vertical cross-sectional front view showing a state in which the vertical sealing machine is moved.

FIG. 5 is a vertical cross-sectional front view of a bag-making filling and packaging apparatus showing another embodiment of the present invention, showing a state where the vertical sealing machine is separated.

[Explanation of symbols]

A vertical sealing machine B feeding part C pressure contact surface T tube molded body W web 1 metal belt 2 heater 4 contact / separation drive part

Claims (2)

[Claims] 1. A vertical sealing machine is provided on the outer surface of the tube molded body so as to be movable in and out of contact with the web via a web, and the web is wound around the tube molded body by intermittent operation of a feeding portion and formed into a tube shape by the vertical sealing machine. While hanging down, in the bag-making filling and packaging apparatus for filling the object to be packaged in the bag body made of this tubular web, the vertical sealing machine moves the annular metal belt in and out parallel to the outer surface of the tube molded body. The metal belt is freely wound and moved in the web feeding direction at the same speed as the operating speed of the feeding portion, a heater for heating the metal belt is provided, and the metal belt is attached to the outer surface of the tube molded body. A bag-making filling and packaging apparatus characterized in that a contacting / separating drive unit for contacting and moving only during intermittent operation is continuously provided. 2. The bag making filling and packaging apparatus according to claim 1, wherein a pressure contact surface is provided at a position facing the metal belt on the outer surface of the tube molded body so as to be movable in the feeding direction of the web.