JPH0110360Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on cement, fly ash, flour,
The present invention relates to a powder storage bag for storing bentonite, stone powder, slaked lime, etc.

Conventionally, various improvements have been made to the opening for inserting the nozzle in this type of bag, but there is no one that has a simple structure, can securely close the opening, prevent the contents from leaking, and is easy to manufacture. .

For example, Utility Model Publication No. 36-10177 has a paper strip made of a soft material that constitutes the injection port in one corner of the paper tube, but since it is a paper strip, it requires a step of pasting it to the corresponding part one by one, so it is not suitable for mass production.

Therefore, the purpose of the present invention is to provide a storage bag that can be easily manufactured and that can fix a sheet such as a film constituting a check valve without adhesion using adhesives, etc. The purpose of the present invention is to provide a bag that can prevent the wear and tear of the contents.

The above object is to form a protrusion 3' which becomes a nozzle insertion port 3 at the open end of one side of the bag body 1 consisting of multiple bag bodies 1a, 1a, and to form a protrusion 3' that becomes the nozzle insertion opening 3 in the bag body 1 including the protrusion 3'. By folding one side inward, a gusset portion 1b having a substantially M-shaped cross section is formed, and the multilayer bag body 1 on the one side is formed.
A synthetic resin film or sheet 2 having a length approximately equal to the height of the side sides is placed between a and 1a in the cross section approximately M.
The nozzle insertion port 3 is inserted into the letter-shaped gusset 1b and pulled out the tip of the film or sheet 2.
This is achieved by making the check valve 4 protrude from the protruding part 3' and folding it together with the bag elements 1a, 1a to form the check valve 4.

This will be explained below with reference to the drawings.

The storage bag according to the embodiment has a bag body 1 formed by tripling the bag body 1a, and the bag body 1 has a cylindrical bag shape with upper and lower cut ends opened, and one of the upper open ends. A protruding portion 3' serving as a nozzle insertion port 3 is formed on the side.

Both sides of the bag body 1 are each folded inward to form a gusset portion 1b having an approximately M-shaped cross section, but there is a side edge between the bag bodies 1a on one side of the bag body forming the protruding portion 3'. A film 2 having a length approximately equal to the height is sandwiched. As shown in FIG. 3, this film 2 is folded into a substantially M-shape according to the cross-sectional shape of the gusset 1b, and its leading end is pulled out to protrude from the projection 3' (see FIG. 4). In this way, the vertically long film 2 is sandwiched and fixed between the three layers of the bag body 1a, so there is no need to fix it by adhesive or other means during manufacturing. When the film 2 and the bag body 1a are folded into the main body at a substantially right angle, the protrusion 3' of the bag body 1 from which the film tip protrudes is formed into an insertion opening 3 for the nozzle n. becomes the check valve 4.

The most common method of bag making involves forming a plurality of sheets of long base paper into a tube shape using a flat-cut tube-making machine.
When the film 2 is fed between 1a and cut to a predetermined length (bag length) after being formed into a cylindrical shape, the film 2 is also cut to the same length, so the process is not complicated and it is also convenient for manufacturing the storage bag of the present invention. It's convenient. Reference numeral 5 indicates closure strips that are machine-sewn to the upper and lower folded pieces 6 of the bag body 1 with thread 7, but the bag body 1 may be attached to the bag body 1 with an adhesive. Note that the bag body 1a is not limited to three layers.

Since the present invention has the configuration described above, in the manufacturing process, the film 2 is inserted into the gusset 1b having a substantially M-shaped cross section, or the main body side cover with the film 2 interposed in advance is folded together with the film 2 into a substantially M-shape. Town 1
After forming the bag body 1, it is necessary to cut it into the shape of the bag body 1, and then make the film 2 protrude slightly.The check valve 4, which is formed by folding the film 2 inward at a substantially right angle, can be used when storing powder or granules. Nozzle n from quantitative bagging machine
If it is inserted into the insertion port 3 as shown in Figure d, it will open and powder or granules can be smoothly filled into the bag body 1. After that, if the nozzle n is removed, the check valve 4 will open as shown in Figure 5e. As shown in Figure 2, it closes naturally, preventing stored powder and granules from leaking out from the insertion port during transportation and handling.
The simple structure can reliably prevent loss of weight and leakage of powder, which are the biggest drawbacks of this type of bag.

As is clear from the above explanation, the present invention can be fixed simply by attaching the synthetic resin film or sheet 2 between the multiple bag bodies 1a, 1a, and therefore the sealing members cannot be attached one by one as in the conventional case. There is no need to apply adhesive stitches to the relevant parts and fix them, and the check valve 4 can be formed by simply folding and cutting the film or sheet 2, which greatly streamlines the manufacturing process and makes it suitable for mass production. This has the effect of being able to provide a storage bag with this structure at a low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the powder and granule storage bag according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a vertical sectional view of the main part, Fig. 3 is a cross-sectional plan view, and Fig. 4 5 is a front view cut away with a synthetic resin sheet attached to the bag body, and FIG. 5 is a perspective view showing the manufacturing sequence. 1... Bag body, 1a... Bag body, 1b... Gusset, 2... Synthetic resin film or sheet, 3...
Insertion port, 3'... protrusion, 4... check valve 4.

Claims (1)

[Scope of utility model registration request] A protrusion 3' that becomes the nozzle insertion port 3 is formed at the open end of one side of the bag body 1 consisting of multiple bag elements 1a, 1a, and one side of the bag body 1 including the protrusion 3' is inserted into the interior. By folding it in the direction, the gusset part 1b has an approximately M-shaped cross section.
between the multilayer bag bodies 1a, 1a on one side,
A synthetic resin film or sheet 2 having a length approximately equal to the height of the side sides is attached to the gusset portion 1 having a substantially M-shaped cross section.
b, and by pulling out the tip of the film or sheet 2, it protrudes from the protrusion 3' of the nozzle insertion port 3, and the film or sheet 2 is inserted into the bag body 1a, 1a.
A powder and granule storage bag characterized by being folded together to form a check valve 4.