JPH0125836Y2 - - Google Patents

Description

[Detailed description of the invention] ● Industrial application field This invention prevents the axial movement of the outer cylinder when tightening and attaching the hose body to the fitting, thereby reducing the tightening work of the polymeric layer of the tightening material. This invention relates to a joint structure for fire hoses, etc., which is intended to ensure reliable and effective operation.

● Conventional technology Conventionally, in the joint structure of a fire hose, a hose body inserted between the outer surface of the joint cylindrical portion of the joint fitting and the inner surface of the outer cylinder overlapped on the outside is inserted into the outer cylinder. Two cylindrical cylinders each having at least one window or hole in the hose that is inserted through the insertion hole provided and fastened with a polymeric layer of fastening material, or that is inserted into the joint attachment part. While fitting the rings, each ring is guided through the window or hole provided in one of the cylindrical rings by going around between each ring and the hose and leading out to the window or hole provided in the other cylindrical ring. For example, there is a method in which a band or wire is arranged to tension the outer periphery of the hose in response to rotating operations in opposite directions.
35070, Jitko 52-29303 or Jitko 52-2118
It is known from publications such as No.

In these conventional structures, all the outer cylinders are supposed to be able to move freely in the axial direction, so during the tightening work, this moves in the axial direction, causing the hose body attached to the outer periphery of the cylindrical part of the fitting to move. There is a problem in that it is difficult to wrap and tighten the polymer layer of the tightening material at the desired position with respect to the tightening groove.

● Means for solving the problems On the other hand, the invention of this application eliminates these problems of the conventional structure. The inner surface of the root portion of the mantle cylinder is fitted onto the outer surface of a root cylindrical portion having a larger diameter than the outer diameter of the joint cylindrical portion provided at the root, and the inner surface of the root portion of the mantle cylinder; In the axial direction of the outer cylinder, the locking wires are inserted through the insertion holes provided in the outer cylinder into the concave circumferential grooves provided opposite to the outer surface of the base cylinder portion of the joint fitting. The movement of the hose in the polymeric layer of the clamping material is prevented from moving in the axial direction while keeping the rotation of the mantle cylinder free. Since the body tightening position is secured, when tightening the hose body to the fitting, it is possible to prevent the outer cylinder from moving in the axial direction and tighten the hose body reliably and effectively, which is extremely useful. .

This invention will be explained below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of this invention, and FIG. 5 shows a sectional view explaining its operation,
A hose body 6 is disposed between the outer surface 3 of the joint cylindrical portion 2 of the joint fitting 1 and the inner surface 5 of the outer cylinder 4 superimposed on the outside.
is inserted, and the hose body 6 is inserted into the outer cylinder 4.
A joint provided at the base of the joint cylindrical part 2 of the joint fitting 1 in a hose joint for firefighting, etc., which is fastened with a polymeric layer 8 of a band-shaped fastening material inserted through an insertion hole 7 provided in the joint. The outer cylinder 4 is attached to the outer surface 3 ' of the base cylindrical part 2' which has a larger diameter than the outer diameter of the cylindrical part.
The inner surface 5 ' of the root portion 9 of the mantle cylinder 4 is fitted, and the inner surface 5 ' of the root portion 9 of the mantle cylinder 4 faces the outer surface 3 ' of the root cylindrical portion 2' of the joint fitting 1, respectively. The outer cylinder 4 is prevented from moving in the axial direction by a locking wire 13 inserted into the concave circumferential grooves 10 and 11 provided through the insertion hole 12 provided in the outer cylinder 4. .

In addition, in the drawing, 6' is the interior of the hose body,
Reference numeral 14 indicates a concave circumferential groove for tightening the hose body provided on the outer surface 3 of the cylindrical joint portion 2 of the joint fitting 1.

FIG. 6 shows another embodiment of this invention, in which a linear body is used as the fastening material, and the other structural parts are the same as the embodiment shown in FIGS. 1 to 4.

According to the invention of this application, on the outer surface 3' of the base cylindrical part 2', which is provided at the base of the joint cylindrical part 2 of the joint fitting 1 and has a larger diameter than the outer diameter of the joint cylindrical part 2 ,
The inner surface 5 ' of the root portion 9 of the outer cylinder 4 is fitted, and the inner surface 5 ' of the root portion 9 of the outer cylinder 4 and the outer surface 3' of the root cylindrical portion 2' of the joint fitting 1 are fitted. concave circumferential grooves 10 and 11 provided facing each other;
The locking wire 13 inserted through the insertion hole 12 provided in the outer cylinder 4 prevents the outer cylinder 4 from moving in the axial direction. This prevents the related position from moving in the axial direction while maintaining free rotation, and thereby secures the position where the polymer layer of the fastening material tightens the hose body. When tightening the hose body, it is possible to prevent the outer cylinder from moving in the axial direction and tighten the hose body reliably and effectively, which is extremely useful.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of this invented structure, Figs. 2 and 3 are cross-sectional views taken along the lines - -, Fig. 1, Fig. 4 is a sectional view taken along the lines - Fig. 2, and Fig. 5 is a sectional view taken along the lines - FIG. 6, which is a sectional view illustrating the operation of this invented structure, shows another embodiment. In the drawings, the same reference numerals indicate the same or equivalent parts, 1 is the joint fitting, 2 is the joint cylindrical part, 2' is the root cylindrical part, 3 is the outer surface of the joint cylindrical part 2, and 3 ' is the root cylindrical part 2. 4 is the outer surface of the mantle cylinder, 5 is the inner surface thereof, 5 ' is the inner surface of the base portion 9 of the mantle cylinder 4, 6
1 is a hose body, 7 and 12 are insertion holes, 8 is a polymeric layer of tightening material, 10 and 11 are concave circumferential grooves, and 13 is a locking wire.

Claims (1)

[Scope of utility model registration request] A hose body is inserted between the outer surface of the joint cylindrical portion of the joint fitting and the inner surface of the outer cylinder superimposed on the outside thereof, and the hose body is inserted through an insertion hole provided in the outer cylinder. In a hose joint that is tightened with a polymeric layer of tightening material, the mantle is provided on the outer surface of the root cylindrical portion of the joint metal fitting, which has a larger diameter than the outer diameter of the joint cylindrical portion. The inner surface of the root portion of the cylinder is fitted into a concave circumferential groove provided opposite to the inner surface of the root portion of the mantle cylinder and the outer surface of the root cylindrical portion of the joint fitting. A hose joint structure for fire fighting, etc., characterized in that movement of the jacket cylinder in the axial direction is prevented by a locking wire inserted through an insertion hole provided in the jacket cylinder.