JPH059150Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for manufacturing a cushioning body made of plastic film.

[Conventional technology]

Conventionally, the cushioning material used between the product and the container when packaging the product has been shredded newspaper or long thin plastic Styrofoam materials, but these materials not only scatter and contaminate the surrounding area when the package is opened, but also cause contamination.
During transportation, friction generated electricity, causing problems. For this reason, it has been proposed to use empty plastic film bags as cushioning materials. An application for an apparatus for automatically and continuously manufacturing such a buffer body (Japanese Patent Application Laid-Open No. 61-24428) was previously filed. The above-mentioned shock absorber manufacturing apparatus will be explained below with reference to FIGS. 7 and 8.

In the figure, a is a film, and this film a
is from its guide roll b to feed rolls c, c,
The film a is guided through a guide roll d to a former e which shapes the film a into a cylindrical shape. At the front upper part of the former e, tension rolls f, f, preheating bars g, g, and fine seal rolls h, h, which clamp both side edges of the film a and pull it forward, are successively provided. In front of the fine seal rolls h and h,
A pair of sponge-like rolls i, which sandwich both sides of the film 1, are pivotally connected to rotate about a vertical axis. A conduit connected to a compressor (not shown) connects to a pipe j which extends forward via a cryogenic generator that cools the air (preferably approximately 20°C below the outside air temperature at the time of packaging); It penetrates between the sponge-like rolls i and opens at the front side. A pressure detector and a temperature detector are provided near the opening of this pipe j. In front of the sponge-like rolls i, i, horizontal sealers k, k with perforated cutters are fixed to rotatable horizontal shafts l, l,
Further, in front thereof, vertical sealers m, m having perforated cutters and vertically orthogonal to the orientation of the horizontal sealers k, k are fixed to rotatable vertical shafts n, n. A discharge conveyor and a chute are installed in front of this. The operation timing of the horizontal sealers k, k is slightly delayed from the operation timing of the vertical sealers m, m.

Next, the operation of this device will be explained.

The film a is unrolled by feed rolls c, c and shaped into a cylinder by a former e, and the joined portions of both ends thereof are heated by preheating bars g, g, and are completely sealed by fine seal rolls h, h. A pipe j is inserted into the film a, which has thus become cylindrical. This cylindrical film a is sandwiched between sponge rolls i, i from both sides. These sponge-like rolls i, i rotate a little faster than the feeding of the film a, and feed the cylindrical film a so as not to sag. A pipe j inside the tube transfers compressed air, which is colder than the outside air, to a sponge-like roll i,
The film is fed into a cylindrical film a located in front of i. The sponge-like rolls i, i also serve to prevent this air from escaping. The tip of the well-inflated cylindrical film a is first completely sealed with vertical sealers m, m, then sealed with horizontal sealers k, k, and perforations are made in each sealed portion O.
By alternating the vertical seals and horizontal seals in this way, a continuous triangular pyramid-shaped sealed empty bag P can be made, which is taken out of the machine from the discharge chamber or chute.

[Problem that the invention attempts to solve]

However, since the conventional shock absorber manufacturing apparatus described above uses a flat film to produce a triangular pyramid-shaped shock absorber, a former is required to shape the flat film into a cylindrical shape. In addition, this conventional shock absorber manufacturing equipment manufactures and stores shock absorbers in large quantities, and fills the shock absorbers with pre-cooled air to prevent the volume of air inside the shock absorbers from decreasing due to atmospheric temperature differences. There is a need. For this purpose, conventional buffer manufacturing equipment requires a compressor, an ultra-low temperature generator, a water separator, piping, and the like. Therefore, the conventional shock absorber manufacturing apparatus has problems such as being large and heavy, and being of a fixed type.

Furthermore, a cylindrical film filled with compressed air is thermocompressed using horizontal sealers k, k and vertical sealers m, m whose sealing axes are perpendicular to each other to produce a triangular pyramidal shock absorber. , as shown in FIG. 8, the fin seal part (back part) at the end of film a
q and the middle part (abdominal part) r of the film a need to be thermocompression bonded using horizontal sealers k, and this fin seal part q creates a partially thick part, which causes excessive pressure and pressure to be applied to the film. There are problems such as the need to load the horizontal sealers k with a heating temperature higher than necessary.

An object of the present invention is to provide a shock absorber manufacturing apparatus in which the entire apparatus is small and lightweight, is movable, and does not require excessive pressure or heating temperature to be applied to the heat sealer.

[Means for solving problems]

The present invention includes a hollow film guide body disposed between half-folded films to open the half-folded film, and a fin disposed downstream of the film guide body to seal one side of the half-folded film. a heat sealer, a blower pipe connected to the film guide body and provided with an opening at a location downstream of the fin heat sealer, and a cylindrical film connected to the film guide body and sealed on one open side. A blower is installed downstream of the opening of the air pipe to fill air into the air through the film guide body and the air pipe, and the blower is installed downstream of the opening of the air pipe to pinch and close the cylindrical film filled with air. An air backflow preventer that prevents backflow,
A rectangular parallelepiped film is placed downstream of the air backflow preventer to prevent the filled air from flowing back, and is activated later than the air backflow preventer to seal the fin heat sealer. A sealing heat sealer that seals with a sealing shaft parallel to the shaft, a film guide body, a fin heat sealer,
It is characterized by being equipped with a feeding mechanism that sequentially feeds the air to the backflow preventer and the sealing heat sealer.

[Effect]

By using a half-folded film, the present invention eliminates the need for a former to form a flat film into a cylindrical shape. Further, by making the film guide body that opens the half-folded film hollow, the film guide body constitutes a part of the air pipe. Furthermore, by using a blower as a means for filling air into the cylindrical film, an ultra-low temperature generator, water separator, piping, etc. are unnecessary compared to a compressor.

Furthermore, by arranging the sealing axis of the fin heat sealer and the sealing axis of the sealing heat sealer in parallel, you can simply seal the middle part of the film with the sealing heat sealer, and the fin seal part at the end of the film and the middle part of the film can be sealed. No need to seal.

〔Example〕

Hereinafter, one embodiment of the shock absorber manufacturing apparatus according to the present invention will be described with reference to FIGS. 1 to 6.

In the figure, 1 is a film, and this film 1
is the feeding direction A of the film 1, as shown in FIG.
A so-called half-folded film 1 that is folded in half along
Then, this half-folded film 1 is wound around the shaft 2. This shaft 2 is rotatably supported on a frame (not shown) of the device of the present invention.

3 is a guide roller rotatably disposed on the downstream side of the shaft 2 of the frame.

Reference numeral 4 denotes a film guide body disposed on the downstream side of the guide roller 3 of the frame. A half-folded film 1, which is arranged in an inserted state and fed by a guide roller 3, is opened left and right. The tip of this guide body 4, that is, the end that comes into contact with the fold line 1b side of the half-folded film 1 is curved.

Reference numeral 5 denotes a fin heat sealer disposed downstream of the film guide body 4 of the frame. It consists of a pressure roller 5b. Two of the fin heat sealers 5 are arranged so that the thermocompression rollers 5b sandwich the end of the half-folded film 1 on the open side from both outside sides.

6 is an air pipe arranged between the half-folded films 1;
This blower pipe 6 has a hollow rectangular parallelepiped shape, and its upper end is connected to the lower surface of the tip of the film guide body 4 described above so as to communicate with the film guide body 4. It is located downstream from the fin heat sealer 5.

Reference numeral 7 denotes a blower mounted on the frame, and the discharge port of the blower 7 is connected to the base end of the film guide body 4 described above.

Reference numeral 8 denotes an air backflow prevention body disposed on the downstream side of the opening 6a of the blast pipe 6, and this air backflow prevention body 8
is rotatably connected to the frame, and the above-mentioned shaft 2,
It consists of a shaft 8a attached parallel to the sealing shaft of the guide roller 3 and fin heat sealer 5, and a clamping plate 8b integrally attached to the shaft 8a in a direction of 180 degrees.
Two air backflow prevention bodies 8 are disposed such that a clamping plate 8b clamps the film 1 from the outside. Further, in this air backflow prevention body 8, the shaft 8a rotates synchronously, and each time the shaft 8a rotates 180 degrees, the clamping plate 8b clamps and closes the outside of the film 1 to prevent air from flowing back.

Reference numeral 9 denotes a sealing heat sealer disposed downstream of the air backflow prevention body 8 described above. , a seal shaft of the fin heat sealer 5, and a shaft 9a installed parallel to the shaft 8a of the air backflow preventer 8;
It consists of a crimp plate 9b integrally attached to the shaft 9a in a direction of 180 degrees. This sealing heat sealer 9 is 2
A stand and a pressure bonding plate 9b are arranged to pressure the film 1 from the outside. A rubber 9c is integrally provided at the tip of one crimp plate 9b of these two sealing heat sealers 9, and a sawtooth 1 is provided at the tip of the other crimp plate 9b.
Provide d. In addition, this sealing heat sealer 9 is
The shafts 9a rotate synchronously, and each time the shaft 9a rotates 180 degrees, the pressure bonding plate 9b seals the film 1 by thermocompression bonding from the outside, and the sawtooth 9d seals each time the shaft 9a rotates 360 degrees. Perforations are made at every other seal portion 1d. Furthermore, this sealing heat sealer 9
operates slightly later than the operation of the air backflow preventer 8 described above. That is, after a slight delay after the clamping plates 8b of the air backflow prevention body 8 clamp the outside of the film 1, the pressure bonding plate 9b of the sealing heat sealer 9 is configured to press and seal the outside of the film 1. .

Reference numeral 10 denotes a feeding mechanism disposed downstream of the above-mentioned sealing heat sealer 9. This feeding mechanism 10 is rotatably connected to the above-mentioned frame, and is connected to the above-mentioned shaft 2, guide roller 3, sealing shaft of the fin heat sealer 5, and air backflow. A shaft 10a attached parallel to the shaft 8a of the preventer 8 and the seal shaft (shaft 9a) of the sealing heat sealer 9;
It consists of a feed plate 10b integrally attached to the shaft 10a in a direction of 180 degrees. The two feeding mechanisms 10 are arranged so that the feeding plates 10b grip the film 1 from the outside. Moreover, the saw feeding mechanism 10 is
The shafts 10a rotate synchronously, and each time the shafts 10a rotate 180 degrees, the feed plate 10b clamps the outside of the film 1 and feeds the film 1 downward. Further, in this feeding mechanism 10, when the holding plate 8b of the air backflow preventer 8 and the crimp plate 9b of the sealing heat sealer 9 are in a horizontal state, the feeding plate 10b is in a vertical state, and the holding plate of the air backflow preventer 8 is in a vertical state. 8b and the crimp plate 9b of the sealing heat sealer 9 are in the vertical position, the feed plate 10b is in the horizontal position. As a result, there is no possibility that the air backflow prevention operation of the air backflow prevention body 8, the sealing operation of the sealing heat sealer 9, and the feeding operation of the feeding mechanism 10 will interfere with each other.

The shock absorber manufacturing apparatus of the present invention in this embodiment has the above-mentioned configuration, and its operation will be described below.

First, the half-folded film 1 wound around the shaft 2 is guided by the guide roller 3 and sent in the direction of arrow A. The half-folded film 1 is opened left and right by the film guide body 4, and the ends 1c of the opened film 1 are thermocompressed by a fin heat sealer 5, so that the half-folded film 1 is formed into a cylindrical shape. The cylindrical film 1 is filled with air from the blower 7 via the film guide body 4 and the air pipe 6. The film 1 filled with air is first clamped and closed by the clamping plates 8b of the air backflow prevention body 8 from both outside sides to prevent the air from flowing back. Subsequently, the pressure bonding plate 9b of the sealing heat sealer 9 seals the intermediate portion of the film 1. At this time, since the sealing axis of the fin heat sealer 5 and the sealing axis of the sealing heat sealer 9 are parallel, as shown in FIG.
There is no need to seal the fin seal portion 1c at the end of the film 1 and the intermediate portion of the film 1. Therefore, the fin seal portion 1c creates a partially thick walled portion, and there is no need to load the sealing heat sealer 9 with more pressure than necessary or heating temperature more than necessary.

By sealing the air-filled film 1 with the sealing heat sealer 9 as described above,
A rectangular parallelepiped air-filled buffer body 1A is formed. Every other horizontal seal portion 1d of this buffer body 1A is perforated with saw teeth 9d. This buffer body 1A is sent in the direction of arrow A by the feeding mechanism 10.

By using the half-folded film 1 in this manner, there is no need for a former to form a flat film into a cylindrical shape. Moreover, by making the film guide body 4 hollow when the half-folded film 1 is opened, the film guide body 4 constitutes a part of the air pipe. Further, by using the blower 7 as a means for filling air into the cylindrical film 1, an ultra-low temperature generator, a water separator, and piping are unnecessary compared to a compressor. Therefore, the entire arrangement can be made smaller and lighter, and the apparatus can be configured to be movable.

Since the shock absorber manufacturing apparatus of the present invention is small and movable, it is possible to manufacture shock absorbers when necessary.
There is no need to manufacture and store a large amount of buffers at once. For this reason, the volume of the sealed air changes due to fluctuations in atmospheric temperature. However, in the shock absorber manufacturing apparatus of the present invention, since the shock absorbers are manufactured and used within the same seasonal range, the temperature and pressure are The fluctuations in the volume of sealed air are also small. For example, when the atmospheric temperature difference is 5°C, the volume variation rate is about 2%, and when the atmospheric temperature difference is 10°C, the volumetric variation rate is about 3.5%. As a result, the buffer manufacturing apparatus of the present invention does not require the need to cool air in advance and fill the buffer with the cooled air. etc. are unnecessary, and from this point of view, the entire device can be made smaller and lighter, and moreover, it can be configured to be movable.

[Effect of idea]

As is clear from the above, the shock absorber manufacturing apparatus of the present invention uses a half-folded film, thereby eliminating the need for a former for forming a flat film into a cylindrical shape. Further, by making the film guide body that opens the half-folded film hollow, the film guide body constitutes a part of the air pipe. moreover,
By using a blower as a means to fill air into a cylindrical film, a cryogenic generator, water separator, and piping are not required compared to a compressor.
Therefore, the entire device can be made smaller and lighter, and can be configured to be movable.

Further, since the shock absorber manufacturing apparatus of the present invention is small and movable, it is possible to manufacture shock absorbers when necessary, and there is no need to manufacture and store a large amount of shock absorbers at once. For this reason, the volume of the sealed air changes due to fluctuations in atmospheric temperature, but in the buffer manufacturing apparatus of the present invention, the buffer is manufactured and used within the same seasonal range, so the temperature and pressure are The fluctuations in the volume of the sealed air are also small. As a result, the buffer manufacturing apparatus of the present invention does not require the need to cool air in advance and fill the buffer with the cooled air. etc. are unnecessary, and from this point of view as well, the entire device can be made smaller and lighter, and moreover, it can be configured to be movable.

Furthermore, by arranging the sealing axis of the fin heat sealer and the sealing axis of the sealing heat sealer in parallel, you can simply seal the middle part of the film with the sealing heat sealer, and the fin seal part at the end of the film and the middle part of the film can be sealed. No need to seal. Therefore, the fin seal portion creates a partially thick walled portion, and there is no need to load the sealing heat sealer with more pressure than necessary or heating temperature more than necessary.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the shock absorber manufacturing apparatus according to the present invention, in which Figure 1 is a perspective view, Figure 2 is a front view, Figure 3 is a side view, and Figure 4 is a half-folded view. FIG. 5 is a perspective view of the film, FIG. 5 is a perspective view of the film guide body and the blower tube, and FIG. 6 is an explanatory view showing the sealing operation state of the sealing heat sealer. FIG. 7 is a perspective view showing a conventional shock absorber manufacturing apparatus, and FIG. 8 is an explanatory view showing the sealing operation state of the horizontal sealer. DESCRIPTION OF SYMBOLS 1... Film, 2... Shaft, 3... Guide roller, 4... Film guide body, 5... Fin heat sealer, 6... Air pipe, 6a... Opening, 7...
...Blower, 8...Air backflow preventer, 9...Sealing heat sealer, 10...Feeding mechanism.

Claims (1)

[Scope of utility model registration request] a hollow film guide body disposed between the half-folded films to open the half-folded films; a fin heat sealer disposed downstream of the film guide body for sealing one side of the half-folded films; A blower pipe is connected to the film guide body and has an opening downstream of the fin heat sealer, and a cylindrical film connected to the film guide body and sealed at one side is configured to supply air into the cylindrical film. , a blower that fills the air through the film guide body and the air pipe, and an air disposed downstream of the opening of the air pipe that clamps and closes the cylindrical film filled with air to prevent backflow of air. A backflow prevention body and a rectangular parallelepiped-shaped film disposed downstream of the air backflow prevention body to prevent the filled air from flowing back.
A sealing heat sealer operates later than the air backflow preventer and seals with a sealing axis parallel to the sealing axis of the fin heat sealer, and the film is sequentially sent to the film guide body, fin heat sealer, air backflow preventer, and sealing heat sealer. A shock absorber manufacturing device characterized by comprising a feeding mechanism.