JPH0616721Y2 - Automatic breathable bag manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention automatically manufactures a bag of a thermoplastic synthetic resin film that is breathable but impermeable to moisture, or permeable to a certain degree of moisture. Regarding the device, in more detail,
A device for automatically manufacturing a bag body having the function of providing desired air permeability and allowing even a little moisture to pass by freely providing micropores on one or both sides of the bag made of the above material. Because of its compact size, high efficiency, and low cost, some have succeeded in saving labor and reducing product costs. Demand for this type of breathable bag is rapidly increasing because it is effective for preservation of vegetables, etc. However, since the conventional product has high manufacturing cost and is expensive, the present invention provides a cheap and high-quality bag. Is.

[Conventional technology]

Conventionally, in order to produce this kind of breathable bag, a synthetic resin film sheet is passed between a needle roller having needles planted on the outer periphery and a receiving roller having a soft resin or the like attached to the surface corresponding thereto, A means for making a bag by cutting a large number of fine holes in a film and cutting the perforated sheet thus obtained is used (Japanese Utility Model Publication No. 59-22084).

[Problems to be solved by the invention]

As described above, conventionally, in order to manufacture a breathable bag, in a plane state an appropriate synthetic resin sheet, a step of punching with a needle roller, and a step of cutting the perforated sheet to form a bag body. After that, the bags will be manufactured, resulting in higher costs, higher labor wages due to difficulty in finding workers engaged in such work, and in some cases, unmanufacturable situations. Is a problem. Therefore, it is possible to consider that it is an automatic manufacturing method,
There are several points to be resolved in this. For example, it is necessary to change the size of micropores, the density of pores per unit area, that is, the degree of air permeability (called air permeability) according to the application, but these operations are complicated and require manual labor. If so, the effect of automation is diminished. Automated devices are suitable for mass production of single items, but are vulnerable to modification of details. If the raw material is started in the form of a sheet, the bag-making process and the mechanism become very complicated, so it is necessary to find a better means.

[Means for solving problems]

The present invention has been obtained as a result of various tests and studies to solve the above-mentioned problems, and is an apparatus for automatically and automatically producing a breathable bag having desired micropores, which is short of manpower and cost reduction. Both goals have been achieved. The basic technical idea will be described first. As a raw material for forming the bag, a thermoplastic synthetic resin film, for example, polyethylene, polypropylene, polyvinyl or other film formed as a tubular body is used. Then, a flat film obtained by folding the tubular film is wound around a roll and placed, and this is used as a starting material. During the sequential feeding of this by the feeding roller of the apparatus main body, the flattened tubular film is slightly swelled into a hollow shape, that is, the front and back of the sheet come into contact and become flat. It is once released.

This is achieved by enclosing and pre-sealing a separator with a thin plate-like special structure inside the tubular sheet, and at the same time, using this separator, a large number of needle rollers are provided on the front surface of the sheet, or on both the front and back surfaces. Make a small hole.

The perforated sheet is then guided to the bag making mechanism, which heats the flat sheet with a perforated tubular sheet again at regular intervals by a bag making mechanism consisting of a heater and a cutter. By forming a fusion and cutting the sheet at the lower edge line of this fusion part or by making a perforation,
A bag having an opening and a bottom is formed. Since the above-mentioned constant interval corresponds to the depth of the bag, the length of the bag can be changed by adjusting this constant interval. The size of the width of the bag is determined by the size of the diameter of the tubular sheet that is the first raw material.

Explaining this in more detail, this device is composed of a raw material feeding mechanism, a separator mechanism, a punching mechanism, a bag-making mechanism, and a winding mechanism.
A pair of rollers interlocking with a drive source (motor) of the apparatus, which is a roller mechanism that holds a sheet and sends it forward, and is installed above and below the machine casing. Figure 1
(3), (3 '), (11), and (11') are that. The separator mechanism encloses the above-mentioned separator inside a cylindrical sheet, and is supported by an external supporting roller through the sheet,
A rubber roller bearing soft rubber, soft resin or the like is mounted on the separator body. The purpose of the separator mechanism is to return the flattened tubular sheet to the hollow state, that is, to separate the front and back of the sheet. Next, the perforation mechanism perforates minute holes in the sheet by a needle roller provided so as to circumscribe the rubber roller on the separator, and is adjusted so that the tip of the needle slightly enters the rubber roller. The needle roller preferably employs means for positively rotating in association with the drive source. The bag-making mechanism is composed of a combination of a heat-sealing portion and a cutter or a perforated cutter. The take-up mechanism takes up a perforated sheet when the bag-making mechanism is first separated from the main body device, and when the bag-making mechanism is connected to the main body device, the perforated holes are continuously formed at perforations. It is a winding mechanism for winding the bag.

The device of the present invention is not limited to the fact that the above-mentioned mechanisms are integrally and compactly constructed, but also has the following features. That is,
Since the air permeability of this kind of breathable bag needs to be changed depending on the property of the item to be put in the bag, it is necessary to change the size and number of the micropores according to the demand of the user. Conventionally, automated devices are said to be for mass production of products with a certain standard, but in the case of this device, the needle roller can be easily replaced, and the structure of the needle roller is By forming a combination structure with an annular needle ring that is externally fitted to the above, it is possible to provide vertical striped small hole bands not in the entire surface of the bag but in a partial area. In addition, the conventional product has a small hole in the opening of the bag,
Since there is a drawback that it is easier to tear than this part, it is easy to perform operations such as providing a region in the width direction of the bag that does not have small holes at regular intervals so that the part without this small hole becomes the open end of the bag. It can be done. Specifically, as shown in FIG. 10, use a needle roller that has a portion where the needle is not planted in the axial direction of the needle roller, or the needle is planted in this portion, but round the tip of the needle roller to provide a punching function. A lost needle roller can also be used. A motor (M) is provided on a side surface of the main body of the apparatus, and a motor such as a chain is used to transmit the power to a feeding roller, a needle roller, and a winding roller.

[Action]

The present invention relates to the above-mentioned structure, and the operation thereof will be described.The tubular sheet (1) includes the feeding rollers (3), (3 ') and () provided on the upper and lower portions of the machine frame (19). 11) and (11 ') are sequentially pulled out in the direction of the arrow.
A pair of small rollers in which a separator (5) is enclosed in the sheet immediately below (3) and (3 ') and is attached to itself.
(6), (6 ') is supported on the supporting rollers (8), (8'), the flat sheet (1) is temporarily bulged by the separator into a hollow shape, and the front side (1x) of the sheet, The back side (1y) is the support roller (8), the small roller (6) and the support roller, respectively.
Proceed while being held between (8 ') and the small roller (6').
Next, when the front side (1x) of the sheet passes between the needle roller (10) and the rubber roller provided on the separator, fine holes are formed by the needle roller. Of course, the front side and the back side of the sheet can be punched at the same time. The sheet perforated in this way is sandwiched between the lower feeding rollers (11) and (11 ') to form a flat shape, wound on the winding roller (4), and then mounted on a bag-making device to form a bag. Alternatively, as shown in FIG. 8, the bag making mechanism and the main body device may be formed in series and the bag may be immediately made.

Next, the operation of the bag making mechanism will be described. In FIG. 8, the heater (13) and the cutter intermittently descend onto the pedestal (14), press the perforated sheet (1a), and press the front and back sides of the sheet. Fused,
At the same time as forming the fused portion (15), perforations (16) are formed at the rear end edge (with respect to the traveling direction of the sheet) of the fused portion. Since this fusing operation is intermittent, the progress of the sheets (1) and (1a) in the entire apparatus becomes an intermittent movement. In that respect, when the bag making device and the device for punching shown in FIG. 1 are separately provided,
Until the wound perforated sheet is wound up, it is in continuous motion, and only the bag-making device is in intermittent motion.

By using the needle roller (10 ′) of FIG. 10, it is possible to form a sheet having a non-perforated area (18) that does not have small holes (h) intermittently on the sheet. When you put it on the air-permeable bag (2
2) can be obtained.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. First, the case where the bag making mechanism is separated will be described. 1 to 3, (1) is a raw material sheet obtained by flatly folding a tubular body of a kind of thermoplastic synthetic resin polyethylene film, (2) is its winding roller, (3), ( 3 ') is a pair of raw material feeding rollers, and (3) is a chain (C) from a drive source motor (M).
The roller (3 ') is driven by and is pressed against the roller (3'), and both rollers hold the raw material sheet (1) (raw material feeding mechanism). (5) is a flat material sheet (1)
As shown in FIG. 4 and FIG. 5, a separator enclosed inside has a pair of small rollers (6), (6 ′) and a lower part on the upper part of a thin plate having a predetermined width and length. A rubber roller (7) bearing a soft rubber or a soft synthetic resin is provided on the separator, and this separator itself is for temporarily making the raw material sheet flat, that is, the front sheet. And the back sheet are in close contact with each other, and the whole is deformed into a bulge shape. As such, the pair of small rollers (6) and (6 ') described above are outside the sheet. It is configured to be supported by support rollers (8) and (8 ') provided on the above so as not to fall. (9) and (9 ') are pressing rollers that are lightly pressed to both sides of the lower part of the separator to prevent the separator from shaking (separation mechanism). (1
(0) is a needle roller in which needles are planted around the needle roller, which is usually a needle having a sharp tip and is needled to a desired density, which is a rubber roller attached to the separator (5) described above.
It is provided so as to come into pressure contact with (7) and is driven by a chain (C) from a drive source. As shown in the figure, the front side (1x) of the raw material sheet (1) having the front and back separated from each other passes between the needle roller and the rubber roller, so that the sheet is perforated at this time (perforation mechanism). Although the one shown in the figure is a case where only the front side of the raw material sheet (1) is perforated (Fig. 5), a needle roller is also provided on the back sheet (1y) side, and a rubber roller corresponding to this is attached to the separator (5). )
By providing another rubber roller on the top, that is, one rubber roller (7) is provided side by side above or below the rubber roller (7), and a part of the peripheral surface of this rubber roller is Similar to that shown in FIG. 1, FIG. 4 or FIG. 5, it is easy to perforate both sides of the raw material sheet (not shown) by making them appear on the back side of the separator (5). An example of a double-sided perforated sheet is shown in FIG. Thus, the sheet (1a) perforated on one side or both sides is once wound on the winding roller (4). Then, this is set in a bag-making device and finished into a bag.

Next, the bag making mechanism will be described. In FIG. 8, (12) is a bag making mechanism including a heater (13), a pedestal (14) for the heater (13), and a perforation blade or a cutter (not shown). The perforated sheet (1a) is fused to the front and back of the sheet at regular intervals, and the fused portion
Perforations (16) are provided at the ends of (15). A winding roller (4) is provided after the bag making mechanism. FIG. 8 shows an apparatus in which the raw material sheet (1) is perforated to bag making in series.

Various deformable bodies are used for the needle roller if necessary, but the one shown in FIG. 9 is of a type in which a short needle ring (20) is fitted and fixed to the shaft (21), and
What is shown in the figure is that the needle roller is provided with a portion (17) lacking the needle by a predetermined width in the axial direction. Also, although needles are planted around the entire circumference of the roller, a needle (not shown) is used in which the tip of a needle having a constant width in the axial direction is formed into a round shape so that holes cannot be punched in the sheet. This is for forming a non-perforated part in the sheet to form a bag having no small hole (h) in the opening of the bag.

〔effect〕

INDUSTRIAL APPLICABILITY As described above, the present invention can automatically manufacture a breathable bag having a micropore in a bag made of a synthetic resin film, and can determine the density of the micropores, the shape and size of the perforated band, etc. Since it is an automatic bag manufacturing device that can be easily changed,
It has many practical effects such as labor saving and cost reduction effects and easy work, and is of great practical value.

[Brief description of drawings]

FIG. 1 is an overall front view of the device of the present invention excluding the bag making mechanism, and FIG.
The figure is the same side view, FIG. 3 is the front view of the separator, FIG. 4 is the same side view, and FIG. 5 is an explanatory view showing the engagement state of the separator with the support roller and the needle roller, FIG.
FIG. 7 is an explanatory view showing an example of a perforated sheet, FIG. 8 is an overall view of the device of the present invention, FIG. 9 is another example of a needle roller, a is an external view, b is a side view, and FIG. 10 is FIG. 11 is a side view of the needle roller with a part of the needle missing, and FIG. 11 is an explanatory view showing an example of a perforated bag. Symbol explanation (1) …… Raw material sheet, (1a) …… Perforated sheet, (1x), (1y)
...... One side of the sheet, (2) …… Wrapping roller, (3), (3 ′)
…… Feeding roller, (4) …… Winding roller, (5) ……
Separator, (6), (6 ′) …… Small roller, (7) …… Rubber roller, (8), (8 ′) …… Supporting roller, (9), (9 ′) ……
Pressing roller, (10) …… Needle roller, (11), (1
1 ') …… Feeding roller, (12) …… Bag-making mechanism, (13) ……
Heater, (14) …… pedestal, (15) …… fused part, (16) …… perforation, (17) …… needleless part, (18) …… non-hole band, (19) …… Machine frame, (20) …… Needle ring, (21) …… Shaft, (C) …… Chain, (h) …… Micro hole (small hole), (M) …… Motor, (g)
……guide roller.

Claims (4)

[Scope of utility model registration request] 1. A raw material winding roller (2) in which a tubular body of a thermoplastic synthetic resin film is flattened, and raw material feeding rollers are mounted on the upper and lower portions of a machine frame. A small roller on a thin plate at an intermediate position of the feeding roller
(6), (6 ') and a rubber roller (7) mounted separator (5), the small rollers (6), (6') is a separator
By being supported by support rollers (8) and (8 ') provided outside of (5), they are supported by these support rollers (8) and (8') and circumscribed on the rubber roller (7). A needle roller (10) is provided, and the lower feeding roller (11), (1
1 ') followed by a heater (13), a cradle (14), a bag making mechanism (12) consisting of perforated cutters and a winding roller (4) . 2. The rubber roller (7) mounted on the separator (5) is provided at two upper and lower sides, and the needle rollers (10) circumscribing the rubber roller (7) are respectively provided before and after the separator (5). 1. An automatic manufacturing apparatus for breathable bags according to 1. 3. The apparatus for automatically manufacturing a breathable bag according to claim 1 or 2, wherein the needle roller (10) has a needleless portion (17) in which no needle is planted by a constant width in the roller axial direction. 4. A rear device comprising a bag making mechanism and a winding roller, and a main body portion before the rear device are separate bodies.
The automatic manufacturing apparatus of the breathable bag of any one of Claims 1-3.