JPS60123308A - Method and device for opening flat tube, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field] The present invention relates to a flat tube made of a synthetic resin film manufactured by an inflation method and a bottom seal type bag manufactured from the same (hereinafter simply referred to as "flat tube etc."). ) This relates to a device that expands the opening edge of a flat packaging tube, etc., for packaging items to be packaged, and is generally incorporated into a part of the packaging device.

[Prior art]

Conventionally, as a method and device for widening the opening edge of a T such as a flat tube of this kind, a pair of clamping members 1.2 are equipped with several vacuum suction cups 6.4, and the clamping members 1.2 are clamped by these, and each -
One film on the side is sucked by the vacuum suction cup, and the clamps are released to open the opening edge T1 of the bag (see Figure 1).

On the other hand, in the case of a long flat tube band T2, a core 6 that can slide is inserted into the flat tube band in advance, and the core is held in that position and the film on the opening edge of the flat tube is sequentially removed. A method and device are known in which the flat tube band is opened sequentially by pinching it with claws 7 and pulling it up (see Fig. 12).

However, the former method using the vacuum suction cup 6.4 is not suitable for quick work because the air itself is compressible, and the opening/closing amount of the air valve and the gas flow neck of the air system cause noise.

Furthermore, if a heat sealer is provided near these, the heat of the heat sealer is taken away by the air flow of these air systems, causing heat spots on the heat sealer.

On the other hand, in the latter method and device, the core 6 is always in contact with the inside of the flat tube band T2, which may cause scratches on the inside and impede or deteriorate the airtightness of the flat tube band T2. This frictional force requires additional power to convey the flat tube band. Furthermore, this method cannot be used for bags with bottoms.

[Purpose of the invention]

The present invention completely eliminates the disadvantages of the known methods and devices as described above, and is based on an idea completely different from the conventional opening methods and means, for widening the opening edge TI of a T such as a flat tube. This is to enable the opening edge 'h to be opened without using suction with reduced pressure air as the main opening method and means, and with almost no damage to the TIC, such as a flat tube.

〔composition〕

This invention involves clamping the opening of a flat tube made of synthetic resin film from both sides along the flat surface along the opening, and while maintaining this clamping state, only one side of the film is moved in the width direction at a certain position. At least one loose part that is a ridge in the length direction of the flat tube etc. is formed on each of the films on both sides, and then the ridges on the films on different sides protrude in different directions from each other. This is a method for opening a flat tube, etc., which is characterized by gripping the tubes and then separating them from each other while maintaining this grip to expand the open OR of the flat tube.

Another invention is provided with a pair of elongated clamping parts that are separated from each other and can clamp the opening edge of a flat box made of a synthetic resin film to be opened, along which the opening edge of the flat box made of a synthetic resin film is to be opened. A main clamping member capable of clamping at least the center portion of the diary section such as the flat tube is fixed to each base member, and a main clamping member on each side is provided on each side of the main clamping member. A movable clamping member having a clamping surface flush with the clamping surface of the movable clamping member slides in the length direction of each of the clamping parts, so that the side surface of the main clamping member and the side surface of the movable clamping member can come into contact with and separate from each other. It is provided to be able to slide freely against the base plate.
The clamping surface of the movable clamping member is provided at a position where it comes into contact with the clamping surface of the main clamping member or the movable clamping member of the opposing clamping part when the clamping parts are brought into pressure contact with each other. The clamping member moves from a position in which the pair of clamping parts are in mutual pressure contact with each other, from a position where they are separated in the direction of the main clamping member, to a position where they contact, and while maintaining that state, separates the pair of clamping parts from each other. This is an opening edge opening device for an opening edge of a flat tube, etc., characterized in that a sequence control device is provided to cause the main clamping member, which is the movable clamping member, to separate from the main clamping member.

[Description of implementation]

First, the present invention will be explained based on a typical embodiment of the mounting device.

Embodiment 1 of the device invention In Figures 6 to 8, reference numeral 10.11 is a clamping portion, each base member 12.13 is long in the width direction of the flat tube, and a main clamping member is provided on the opposing surfaces. 14.15 are attached, and these pair of main clamping members 14.15 can be moved laterally toward each other (see Figure 4), so that they can press against each other at the center part 0, and can press against each other at the side part B. The base member 12.13 extends laterally opposite to the base member 12.13.

The dimension of the central portion C is approximately 1/1 of the width of T such as a flat tube.
It is about 2 to 1/6. These main clamping members 14,
Opponent clamping part 10.1 opposing the side B part of 15
Each of the ten base members 12 and 13 is provided with a movable clamping member 16,17 that can slide in the length direction thereof, that is, in the direction of the opening edge T1 of the flat tube T to be clamped. It is integrated with the movable member 20.21 of the F cylinder device 18.19 which is attached to 16,
The clamping surfaces 26.27 of these base members 16.17 are flush with the clamping surfaces 24.25 of the main clamping member 14.15, and each clamping surface 24.25.26.27 has a large coefficient of friction. The elastic rubber layer is pasted. Thus, when the mutually facing sides of the main clamping member 14.15 and the movable clamping member 16.17 are separated from each other at the maximum distance, the distance between them is 0.5 to 2cI.
The movable clamping member 16.1 is moved by the F cylinder device 18.19 from this position to a position where it can be pressed at about It.
7 moves while in service.

In the illustrated embodiment, a suction hole 22.1 is connected to a reduced pressure air source in a part of the surface of the main clamping member 14.15.
26 is provided. Instead of the suction hole 22.260, a suction cup connected to a reduced pressure air source may be provided on the base member 12.16, and this suction cup may be located below the main clamping member 14.15.

These suction holes or suction cups are only auxiliary.
Not necessarily necessary.

Next, Embodiment 1 of the method invention will be described together with the operation of this aspect.

First, the pair of clamping parts 10.11 are opened,
The movable clamping members 16, 17 also move on the base member 12, 16 and are separated from the fixed clamping members 14, 15, respectively, and the opening of the application tube T is inserted between them (Figure 6, Figure 6). (See Figure 4).

Then, the pair of clamping parts io and ii are closed and clamped at the opening of the flat tube T by F cylinder devices 28 and 29, which are a type of reciprocating mechanism (see Figure 6).

Next, when the movable clamping members 16.17 are moved toward the main clamping members 14.15 of the respective clamping parts 10.11 by the air cylinder devices 18 and 19, the film Ts of the flat tube T that is in frictional contact with the movable clamping members 16.17 (or '['4
) slides on the film 'L'4 (or Ta) on the opposite side and relaxes, so that the ridges T5 or T6 protruding outward in the length direction of the T such as a flat tube are exactly attached to the respective main clamping members 1.
4 (or 15) and movable clamping member 16 (or 17), and finally these members 14 and 16 and 15 and 17
, the films T3 and T4 on each side are gripped (see Figure 7).

In this case, in an embodiment with suction holes 22.26, the film T
3 and T4 are adsorbed separately.

Finally, the pair of jaws 10.11 are separated by the F-cylinder device 28.29, and the flat tube T is accordingly expanded (see Figure 8).

Thereafter, a nail is inserted into the inside of the opening of the flat tube T which has been expanded by a means outside the device of the present invention, and while it is further expanded and kept under tension, the movable holding members 16 and 17 are returned to their original positions. .

The above operation is carried out when the flat tube T is held by a pair of clamps 10.11.
It is repeated every time it is supplied in between.

Embodiment 2 of the device invention This is shown in Figs. 9 to 12, and the difference from the embodiment of the device invention is that movable clamping members 16.16a and 17.17a are provided on both sides of the main clamping member 14.15, respectively. The positions between these and the main clamping members 14, 15 are completely different from each other with respect to the opposing clamps.

Next, Embodiment 2 of the method invention will be explained together with the operation of this embodiment.

First, the pair of clamps 10.11 are opened,
and movable clamping members 16.16a and 17.17, respectively.
A is separated from the main clamping member 14.15, and a flat tube or other T-shaped opening e is inserted between the main clamping members 14.15 and the pair of clamping members 10.11 are closed (see Figure 10).

Thus, all movable clamping members 16.16a and 17.
17a at the same time toward the center of the clamping group until they abut against the main clamping members 14 and 15, and between the main clamping member 14 and the movable clamping members 16, 16a and the main clamping member 15.
and the movable clamping member 17.17a, each film 'I'a of T, such as a flat tube,
T4 is relaxed outward to form ridges T5 and T6, respectively, and these parts are clamped. That is, 1. Hold each film T3 and T4 at two places (see Figure 11).

Thus, the pair of clamps 10 and 11 are separated. Thereafter, the same operations as in Embodiment 1 of the apparatus are performed.

In other figures, parts with the same reference numerals as those in Figures 6 to 8 are the same components and have the same functions.

Embodiment 6 of the device invention This is shown in Figures 16 and 17, and the same reference numerals as in Embodiment 2 of the device are the same components.

The difference is that the main clamp member 14.15 and the movable clamp members 16.16a and 17.17a are a pair of clamp members 10.
11 in a completely symmetrical position.

Next, the effect of this embodiment and embodiment 6 of the co-formulation method invention will be explained together.

First, as shown in Figure 16, the movable clamping member 16.16a
, 17 and 17a are all separated from the main clamp members 14 and 15, the opening of a T such as a flat tube is supplied between them, the pair of clamps 10 and 11 are closed, and the T such as a flat tube is clamped ( (See figure 14).

Next, the movable clamping member 16 of only the clamping member 10 or 11 on one side
．． 16a or 17.17a first, its main clamping member 14
Or move it in 15 directions at the same time to move flat tubes etc.
Hold the films 'I'3 and T4 on one side of the screen in three places (
(See Figure 15).

Next, the movable clamping member 17.1 of the remaining clamps 11 or 10
7a or 16.16a is brought to its main clamping portion 15 or 14, and the remaining film is clamped at three locations (see Figure 16).

Thereafter, the same operation as in the second embodiment of the device invention is performed.

[Effects of method invention]

Since the above-mentioned method allows T films such as flat tubes to be grasped and expanded purely mechanically, the opening operation can be performed accurately, and unlike known pressure-sensitive adsorption methods, there is no risk of uneven operation time. There is no.

Further, since the flat tube T is only grasped at a small area near the opening edge Tl, there is no risk of scratching the flat tube or the like.

In the method of Embodiment 1 of the method invention, since vacuum adsorption is used as an auxiliary method, the opening of the T such as a flat tube is not easily distorted when opening, and it is different from the method of opening only by vacuum adsorption. By comparison, there is no need to increase the degree of pressure reduction.

Method Invention Embodiment 2 In this embodiment, a film T such as a flat tube is used.
3. When T4 is held in two places with films 'I'a and T+ on each side and expanded at the same time, the shape of the opening is wide and close to a rectangle, making post-processing easy. becomes.

Embodiment 3 of the method invention In this embodiment, the positions for holding the T such as a flat tube are completely symmetrical, and the shape of this opening edge T1 expanded is a perfect rectangular shape, and post-processing, that is, delivery of the flat tube, etc. It is easy to insert items to be packaged.

[Effects of device invention]

In this device invention, in addition to being able to carry out the method invention described above, since it has the above-mentioned effect, the opening of the T such as a flat tube is reliable, the operation is purely mechanical, and it is better than a pneumatic type device. In other words, almost no malfunctions or malfunctions occur.

In addition, there are only slight grip marks left between the main clamping member 14 or 15 and the movable clamping member 16 or 17, and there are no scratches or wrinkles left on the T such as the flat tube, and the T such as the flat tube remains after the object to be packaged is loaded. It has remained in beautiful condition, and its structure is relatively simple, with no complicated structure that could cause trouble.

Effects of Embodiment 1 of the device invention The structure is simple, and the thick film, for example, 50μ to 2
Suitable for flat tubes made of film with a thickness of about 0μ, etc., and for such thick harpoons, there is almost no need to use vacuum suction means, but flat tubes with a T width of approximately 15 cm are suitable. or when the thickness of the film is less than 20μ, the suction hole 22 is used as a vacuum suction means.
．． It is better to provide 26.

In the case where suction holes 22 and 26 are provided, the opening of the T such as a flat tube will not be distorted, and a part of the film will not loosen and hang down when the pair of clamping jaws are expanded.

Effects of Embodiment 2 of the Apparatus Invention In addition to the effects of the apparatus invention described above, the method of Embodiment 2 of the method invention can be carried out, and the T film T3, T
4 can be held in two places on each side, so T, such as a flat tube, can be expanded into a nearly rectangular shape.

Also, movable clamping members 16.16a and 17.17b on both sides
Because they all move at the same time, there are fewer parts to slide on the inner surface of the film on both sides, and the loose part is more secure.
There is no risk of losing your grip.

Effects of Embodiment 6 of the Apparatus Invention In addition to the effects of the device invention described above, Embodiment 6 of the Method Invention
This method can be implemented. Furthermore, in this embodiment, the pair of clamping jaws 10.11 are completely symmetrical, and each movable clamping member 16.16a117.17a is also symmetrical and mutually compatible; T such as a flat tube has a film T3 on each side. Since the film is gripped at two positions completely line-symmetrical to I'4, it can be completely expanded into a rectangular shape on a plane.

[Brief explanation of drawings]

The drawings show things related to the present invention, and Figure 1 is a perspective view showing the principle of a conventional device, and Figure 2 is a side view of the principle of another conventional device. Figures N13 to 17 show typical embodiments of the present invention,
Figure 6 is a side view showing the outline of the device, Figure 4 is a partially cross-sectional plan view of the clamping jaws of the town of invention 1 of the device, Figures 1 and 1-5 are longitudinal sectional side views of Figure 4, and fangs 6. Figures 18 to 18 are schematic plan views of the clamping jaws showing the steps and device of Embodiment 1 of the method invention, and Figures 9 to 12 show the steps and device of Embodiment 2 of the method invention, respectively. Figures 16 and 17 are schematic plan views of the clamping jaws, respectively, illustrating the steps and device of embodiment 6 of the method invention. Main symbols in the figure T...Flat tube etc. 'I'a, T4...Film, T5, T6
・・・・・・Ridge, 10.11 ・Pinching jaw, 12.1
3... Base member, 14.15... Main clamping member, 16.18 16 all 7 a... Moving clamping member, 24.25.26.27... Clamping surface . Patent applicant Taiyo Shokai Co., Ltd.

Claims (1)

[Claims] 1) Hold the opening of a flat tube made of a synthetic resin film from both sides with flat surfaces along the opening, and while maintaining this clamping state, remove the film from one side at a certain position. At least one loose part, which is a ridge in the length direction of the flat tube, etc., is formed on each of the films on both sides, and then different parts protruding in different directions are formed. A method for opening a flat tube, etc., characterized by gripping the ridges of the film on the side, and then separating from each other while maintaining this gripping state to widen the opening edge of the flat tube, etc. 2) Claim 1, characterized in that the ridges are formed at different positions on both sides of the film.
How to open flat tubes etc. as described in section. 6) The method for opening a flat tube or the like according to claim 1, wherein the gripped ridges are provided at two locations near both sides of the film on each side. 4) The timing of forming and gripping the ridges is a method in which a flat tube or the like is being held, and a slight time difference is provided between opposing film sides.
How to open flat tubes etc. as described in section. 5) A pair of elongated clamping jaws are provided that can clamp the opening edge of a flat tube made of synthetic resin film or the like to be opened along the opening edge, and the pair of clamping jaws &
For each base member, a main clamping member that can hold the mouth edge part (at least the center part) of the flat tube is fixedly provided, and the main clamping members on each side are fixed to each base member. A movable clamping member having a clamping surface flush with the clamping surface,
each of the clamping jaws is slidable in the length direction of the base member so that the side surface of the main clamping member and the side surface of the movable clamping member can come into contact with and separate from each other; , the clamping surface of each movable clamping member is provided at a position where it comes into contact with the clamping surface of the main clamping member or the movable clamping member of the other clamping member when the clamping units are brought into pressure contact with each other, and each movable clamping member The member is moved from a position where the pair of clamps are in mutual pressure contact, opposite the main clamp member direction KM, to a position where they are in contact, and while maintaining that state, the pair of clamps are separated from each other, and then An opening edge opening device for a flat tube or the like, characterized in that a sequence control device for separating the movable clamping member from the main clamping member is provided. 6) The movable clamping member has one
An opening device such as a flat tube according to claim 5, characterized in that the opening device is provided at a position 111. 7) The opening (b) of a flat tube or the like according to claim 5, wherein the movable clamping members are provided symmetrically on both sides of the main clamping member. 8) An opening device such as a flat tube, characterized in that the sequence control device includes a control means for operating the movable clamping member with a time difference between the movable clamping member and the other movable clamping member at a position where the movable clamping member is substantially in contact with the other movable clamping member.