JP3196156B2 - Fastener connection wind tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air duct for sending ventilation air to a construction site in tunnel construction or the like. More specifically, the present invention relates to a fastener connection portion of the wind tube.

[0002]

2. Description of the Related Art In tunnel construction, subway construction, water and sewage construction, and the like, air is passed from an opening to a site in order to send air to the site. This type of wind pipe is made by connecting the required number of wind duct pipes made of tarpaulin or canvas fabric on site. This wind duct is 10m long
To some extent, diameters range from 1.5 to 2 m.
Fasteners (slide fasteners) are used to connect the air ducts. That is, one side of a fastener piece is attached to each end of each airway tube, the ends of the airway tubes to be connected are abutted with each other, a slider is fitted, and this is slid to engage the fasteners (work teeth) of the fastener. That is, the fastener is closed and connected.

By the way, as described above, the zipper connection wind pipe is constructed by connecting the wind duct pipes one after another with a zipper. However, depending on the construction, the length of the wind pipe may be as long as 2 to 3 km, so that it is high when blowing air. It blows by applying wind pressure. At this time, there is a problem that air leaks from a gap or an end portion of the fastener at a fastener connection portion of the wind tube, and the air blowing efficiency is reduced. In order to solve this problem, on the inner surface near the end of the windpipe on the windward side of the zipper connection part, an airtight enough length that the zipper connection part is crawled into the windpipe on the leeward side at the time of connection. It has been proposed to mount a leak-proof cylinder having flexibility and flexibility (Japanese Utility Model Application Laid-Open No. 58-10650).
No. 0). However, this proposed means has disadvantages such as the end of the air leakage prevention tube flapping at the time of air blowing, causing a turbulent flow and resistance to the flow of air, and a reverse flow occurring at this portion to leak air from the connection portion. There was an inconvenience that the direction of use of the vessel was determined.

Further, as an improvement of the above-mentioned air leakage, in a wind pipe sequentially connected by fasteners provided near both sides of the wind duct pipe, a zipper for a wind duct pipe connecting portion is provided on the windward side of the wind duct pipe. On the outer periphery on the more leeward side, a short outer cylinder for reinforcement having substantially the same diameter as the wind path pipe is provided, and an outer pipe is connected to the auxiliary outer pipe of the windward wind path pipe at the windward end of the short outer pipe. Attach a fastener, and on the leeward side of the wind duct tube, on the outer periphery slightly upwind from the wind duct tube connection fastener, attach a reinforcing outer cylinder of approximately the same diameter as the wind duct pipe, A wind pipe has been proposed which is provided so as to cover a fastener and extends to the leeward side, and a zipper for connecting an outer cylinder to a short outer cylinder for reinforcement of a leeward wind path tube is provided at a leeward end of the outer cylinder. (Japanese Utility Model Publication No. 5-22736). Although the above-mentioned inconvenience can be solved and the improvement of the prevention of air leakage from the fastener connection portion has been seen in this air tube, the air leakage cannot be eliminated.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a zipper connection pipe for preventing leakage from a zipper connection portion as much as possible.

[0006]

That is, the present invention relates to a wind pipe in which an air duct made of a flexible material is connected by a zipper, wherein the zipper connection portion makes the material a double inner and outer layer,
The zipper connection tube is characterized in that the respective fabrics are connected to each other with a zipper, the inner fabric is connected with a zipper having a large worm, and the outer fabric is connected with a zipper having a small worm. It is preferable that the fastener tape of the above-mentioned fastener with small worms is impermeable. Further, the above-mentioned fastener having a small size is preferably an airtight fastener.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. FIG. 1 shows a connection portion of a fastener connection air tube of the present invention, and is a partial sectional view in the length direction thereof. Reference numerals 1 and 2 denote wind ducts. 3 and 4 are the inner fabrics and 5 and 6 are the outer fabrics. Then, the inner fabrics 3 and 4 are connected by a fastener 9 having a large worm, and the outer fabrics 5 and 6 are connected by a fastener 10 having a small worm. Reference numerals 7 and 8 are sewing portions. That is, the zipper connection part is made of the inner layers 3, 4
And outer layers 5 and 6, the inner fabrics 3 and 4 and the outer fabrics 5 and 6 are connected to each other by fasteners 9 and 10, respectively, and the inner fabric is connected by fasteners 9 having large worms. The outer fabric is connected with a small-sized fastener 10.

The above-mentioned fastener connection air tubes are obtained by sequentially connecting a required number of air passage tubes as shown in FIG. In FIG. 2, 1 is an airway tube. The outer fabric 5 exists near the right end. The outer cloth 5 is formed in a short cylindrical shape having substantially the same diameter as the airway tube 1, and one end thereof is sewn 7 to the outside of the airway tube 1. In the case of this example, the fabric of the airway tube 1 constitutes the fabric 3 inside. Therefore, the inner fabric 3 and the outer fabric 5 exist in this portion, and are doubled. At the right end of the inner cloth 3, a fastener piece 9 ′ of a zipper with a large worm is attached, and at the right end of the outer cloth 5, a zipper piece 10 ′ of a zipper with a small worm is attached. Have been.

An outer fabric 6 is present near the left end of the airway tube 1 in FIG. The outer fabric 6 is formed in a short tubular shape having substantially the same diameter as the airway tube 1, and one end thereof is sewn 8 to the outside of the airway tube 1. In this case,
The fabric of the airway tube 1 constitutes the inner fabric 4. Therefore, the inner fabric 4 and the outer fabric 6 exist in this portion, and are doubled. At the left end of the inner cloth 4, a fastener piece 9 "of a zipper having a large worm is attached, and at the left end of the outer cloth 5, a zipper piece 10" of a zipper having a small worm is attached. Have been. In the above example, a short tubular fabric is sewn on the outside of the airway tube to make it double, but a short tubular fabric may be sewn on the inside of the windway tube to make it double. The airway tube and the short cylindrical fabric are tarpaulins and canvases commonly used in wind tubes.

[0010] The required number of air duct tubes whose both ends are hand-crafted as described above is prepared, and these are sequentially connected to obtain the fastener connection wind pipe of the present invention. In FIG. 2, reference numeral 2 denotes an air duct connected to the right side of the air duct 1. In FIG. 2, only the left end of the airway tube 2 is shown, and the right end is omitted. In order to connect the airway tube 1 and the airway tube 2, first, a fastener piece 9 ′ having a large bug at the right end of the fabric 3 inside the airway tube 1 and the left end of the fabric 4 inside the airway tube 2 A fastener piece 9 "having a large worm is butted, a fastener slider is fitted therein, and the slider is slid to engage the fastener worm to form a fastener connection portion 9. This connection procedure itself is a known method. Then, a fastener piece 10 'having a small worm at the right end of the fabric 5 outside the wind duct tube 1 and a fastener piece 10 "having a small worm at the left end of the fabric 6 outside the wind duct tube 2 are butted. A fastener slider is fitted therein, and the slider is slid to mesh with the fastener worm to form a fastener connection portion 10. Thus, the connecting portion shown in FIG. 1 can be configured.

In the above, when the fastener piece is attached to the peripheral portion of the inner fabric and when the fastener piece is attached to the peripheral portion of the outer fabric, the attachment start point and the attachment end point of the fastener piece overlap by 5 to 15 cm. It is preferred that At this time, the attachment end point is located farther from the edge than the attachment start point. FIG.
FIG. 4 is a front view showing a mounting state of the fastener piece.
Reference numeral 1 denotes an airway tube, and 11 denotes one end of the airway tube 1.
9 'is a fastener piece. Reference numeral 12 denotes a mounting start point of the fastener piece 9 ', and reference numeral 13 denotes a mounting end point of the fastener 9'. With this type of installation, when the airway tubes are connected to each other using fastener pieces, the fasteners are doubled between the fastener installation start point and the installation end point, preventing leakage from this part. it can.

The fastener used in the present invention is obtained by implanting a synthetic resin or metal worm into a fastener tape. The size of the fastener is determined by the width of the meshing portion when the fastener is closed. According to the present invention, the large-sized fastener has a width of 7 m when the fastener is closed.
m or more. 9 mm or more is preferable in terms of robustness. Further, the fastener having a small worm is preferably a fastener having a meshing portion width of 1 to 8 mm when the fastener is closed. It is preferable that the fastener tape of the fastener having a small worm is subjected to an air-impermeable treatment by coating with natural rubber, synthetic rubber, or synthetic resin. In addition, as a fastener having a small insect, an airtight fastener (for example, Japanese Utility Model Publication No. 63-13687) in which a meshing portion of the insect is in close contact.
Gazette). Further, a waterproof fastener using a waterproof tape used for a raincoat, ski wear, and the like (for example, see Japanese Patent Publication No. 63-14963) is also preferably used. Attachment of the fastener is performed by sewing or bonding or a combination of both means.

[0013] A large tensile tension is applied to the fastener connection portion of the wind tube by the blowing pressure, and vibration occurs at the time of blowing. In order to prevent the fastener engagement portion of the connection portion from coming off due to such tension or vibration, a robust fastener having a large thread is required for the fastener of the connection portion. However, the meshing portion of the fastener with large worms has a large gap, and air leaks from here, and the blowing efficiency is reduced. Therefore, in the present invention, the connection portion of the zipper connection wind tube is doubled, the connection force is strong for connecting the fabric inside, and a robust fastener having a large bug that does not come off even if tension is applied. Was used to secure the connection strength. In addition, the above-mentioned air leakage was reduced by using a fastener having a small worm and a small gap at the meshing portion for connecting the outer cloth, and having a small air leakage. for that reason,
It is possible to obtain a wind tube having excellent connection strength and preventing a decrease in the blowing efficiency. In addition, if a small zipper is used to connect the inner fabric and a large zipper is used to connect the outer fabric, the inner connection is weak and easy to come off. I can not achieve my purpose.

[0014]

According to the present invention, there is provided a wind pipe in which air ducts made of flexible fabric are connected by fasteners, and the fastener connecting portion doubles the fabrics of the inner and outer layers, and the fabrics are connected to each other by fasteners. The inner fabric is connected with a zipper with a large worm and the outer fabric is connected with a zipper with a good airtightness with a small worm, so that the connection strength is high, the leakage is reduced, and the blowing efficiency can be increased. .

[Brief description of the drawings]

FIG. 1 is a partial longitudinal front view of an example of a connection portion of a fastener connection air tube according to the present invention.

FIG. 2 is a partial longitudinal front view of an example of an airway tube used in the present invention.

FIG. 3 is a front view showing how to attach a fastener piece.

[Explanation of symbols]

1, 2 Airway tube 3, 4 Inner fabric 5, 6 Outer fabric 7, 8 Sewing part 9 Fastener with large worm 9 ', 9 "Fastener piece with zipper with large worm 10 Airtight zipper 10', 10 "zipper piece of airtight zipper 12 zipper piece mounting start point 13 zipper piece mounting end point

──────────────────────────────────────────────────続 き Continued on the front page (56) References Japanese Utility Model Hei 1-175253 (JP, U) Japanese Utility Model Hei 7-26639 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) F24F 13/02

Claims (3)

(57) [Claims] 1. A wind pipe in which a wind duct made of a flexible fabric is connected by a fastener, said fastener connecting portion makes the fabric double in inner and outer layers, and connects the respective fabrics to each other by a fastener, and A zipper connection tube characterized in that the inner fabric is connected with a large zipper and the outer fabric is connected with a small zipper. 2. The fastener-connecting air tube according to claim 1, wherein the fastener tape of the fastener having a small worm is subjected to air-impermeable treatment. 3. The zipper-connecting wind tube according to claim 1, wherein the zipper having a small size is an airtight zipper.