JPS6233840Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connection device for flexible wind pipes used for ventilation in subway construction and mines.

Normally, when ventilating underground work, a large number of unit flexible wind pipes are connected one after another and air is supplied or exhausted using these wind pipes. A hard flange or ring made of a metal material or the like and having a diameter larger than the outside diameter is attached, and it is common to use these flanges or rings to connect the flexible wind pipes. According to such conventional connection devices, when working by passing a flexible wind pipe through a limited-sized through hole in a partition wall of a concrete winding machine, etc., it is difficult to connect the partition wall and a long connecting wind pipe. When it becomes necessary to make relative movement between the unit wind pipes, the connection between the unit wind pipes must be removed, the partition wall or the disconnected wind pipe must be moved, and the joints must be reconnected. Sometimes.

The flexible wind pipe connection device of this invention solves the above problems by providing a fastener (slide chuck) at the end of the flexible wind pipe, and is simple in structure and operation. In this system, there is almost no air leakage, and a pair of removable fasteners is fixed in an annular shape to the adjacent ends of the flexible air pipes to be connected, and the flexible air pipes on the windward side of the ventilation are fixed. The outside of one lengthwise end of a highly airtight and flexible air leak prevention tube is fixed to the inside of the pipe, and the other end of the air leak prevention tube extends beyond the aforementioned fastener when connecting both flexible air tubes. It is characterized in that the airflow reaches the flexible wind pipe on the downwind side.

To explain this invention with reference to the drawings, in FIG. 1, reference numeral 1 denotes unit flexible wind pipes connected to each other, which are made of airtight cloth, such as cloth coated with synthetic resin, for example. The flexible wind pipe 1 can also be provided with a reinforcing member such as a spiral body or ring made of a metal material or the like. 2 is a hanging cloth provided in the longitudinal direction on the upper part of the flexible wind pipe 1, and 3 is a mark indicating the ventilation direction.

As shown in FIGS. 1 and 2, in this invention, removable fasteners (slide chucks) 4 are attached to the adjacent ends 1a, 1b of the flexible wind pipes 1, 1 to be connected. The pair of joining pieces 4a and 4b are each fixed in an annular shape by any means 5 such as sewing or gluing. In the illustrated example, joint pieces 4a and 4b are sewn to the outer surfaces of the wind pipe ends 1a and 1b. The removable fastener 4 described above is one that can completely separate the connecting pieces 4a and 4b when the slider 4c opens the joint pieces 4a and 4b. As clearly shown in Fig. 2, the length of the joining pieces 4a, 4b is slightly longer than the entire circumference of the wind pipe 1, and the pieces are fixed to the wind pipe ends 1a, 1b by sewing or other means. It is desirable that the lengths of the portions 5, 5 to be made to correspond to the total circumferential length of the wind pipe 1 are approximately the same. According to this configuration, during connection, the slider 4c of the fastener is advanced from the position shown in FIG. This is because it polymerizes at the other end and improves airtightness. In the connection device of this invention, as clearly shown in FIG. 3, a leak prevention cylinder 6 with excellent airtightness and flexibility is provided inside the connection part of the flexible wind pipes 1, 1, spanning the fastener 4 part. has been done. Examples of the material for the air leak prevention tube 6 include airtight cloth and soft synthetic resin sheets. The outer diameter of the air leak prevention tube 6 is the same as that of the flexible air pipe 1.
The outside of one longitudinal end of the air leakage prevention tube 6 is approximately equal to the inner diameter of the flexible air tube 1 on the windward side of ventilation.
Any fixing means 7 such as gluing, welding, sewing etc.
The other end of the air leak prevention tube 6 is made to protrude an appropriate length from the end 1a of the flexible air pipe 1, and is closed when both flexible air pipes 1, 1 are connected. It is designed to fit into the inside of the flexible wind pipe 1 on the leeward side of the ventilation beyond the fastener 4 portion that has been closed.

In addition, in the figure, 8 indicates both ends 1a, 1 of the flexible wind pipe 1.
A plurality of presser pieces are provided at appropriate intervals in the circumferential direction of b, and are used to stop the entire wind pipe 1 by pressing with hands when opening and closing the slider 4c of the fastener 4, and to move the slider 4c easily. . Each presser piece 8 in the illustrated example is formed of an elongated piece of cloth, and both ends are fixed to the outer peripheral surface of the wind pipe 1 by sewing or the like, so that fingers can be inserted into the presser piece 8. Further, the holding piece 8 can also be used as a stopper for engaging the puller 4d of the slider 4c to prevent it from sliding open when the slider 4c is closed.
As shown in FIGS. 1 and 4, the slider 4c of the illustrated example is provided with two pulls 4d, and the outer ends of each pulls 4d are provided with two male and female hook pieces 9.
Each puller 4d is detachably attached to the presser piece 8 on each side by the hook 9, and when the slider 4c is closed, together with the presser piece 8, the slider 4c is prevented from unintentionally opening. prevent.

The device for connecting flexible wind pipes of this invention described above has a flexible structure as a whole, so it is possible to connect multiple flexible wind pipes to the insertion hole in the partition wall of underground construction. 1, and if it becomes necessary to move the flexible wind pipes 1 and the partition wall relative to each other, the connection between the flexible wind pipes 1 and 1 must be removed one by one. In addition to improving work efficiency, it is advantageous in terms of safety because long-term interruptions in ventilation can be avoided. Furthermore, the connecting device of the present invention has a simple structure, and it is easy to connect or disconnect the flexible wind pipes 1, 1, and during ventilation, the connection device of the present invention has four parts of the fastener, that is, the connection of the flexible wind pipes 1, 1. At the ends 1a and 1b, the air-tight and flexible air-leak prevention cylinder 6 is brought into close contact with the inner surfaces of the flexible air pipes 1, 1 due to the static pressure of the circulating gas, so there is almost no ventilation leakage. Has many advantages.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the flexible wind pipe connection device of this invention, Fig. 2 is an enlarged partial plan view of the main part with the slider puller omitted, and Fig. 3 is the same main part. FIG. 4 is an enlarged front view showing the slider of the fastener. 1...Flexible wind pipe, 1a, 1b... Ends of flexible wind pipe, 4... Fastener, 6... Air leak prevention tube.

Claims (1)

[Scope of utility model registration request] Adjacent ends 1 of flexible wind pipes 1, 1 to be connected
Connecting pieces 4a and 4b forming a pair of removable fasteners 4 are fixed to a and 1b in an annular shape, respectively, and a leak prevention tube with excellent airtightness and flexibility is provided inside the flexible wind pipe 1 on the windward side of ventilation. 6, and the other end of the air leak prevention tube 6 is fixed to the outside of one longitudinal end of the tube 6, and the other end of the air leak prevention tube 6
A connecting device for a flexible wind pipe, characterized in that when connected, the flexible wind pipe 1 is connected beyond the fastener 4 portion to reach the flexible wind pipe 1 on the leeward side of ventilation.