JP3009443U - Hose fittings - Google Patents

Abstract

(57) [Abstract] [Purpose] A plastic sleeve that is attached to the abutting portion of the ends of two hoses and a sleeve that is detachably attached to the outer surface of the sleeve to compress the sleeve toward the center. In the hose joint including the fastener, the sleeve can be adhered to the hose almost uniformly, the adhesion is not reduced during use, the handling is easy, and the manufacturing cost can be reduced. [Structure] A semi-cylindrical support fitting 20 that covers almost a half circumference of a sleeve 13, and a steel rope 2 wound around the support fitting and the remaining half circumference of the sleeve.
Bolt 2 consisting of 3 and connected to both ends of the steel rope
4 is fitted with a nut 27, bolts can be inserted into both ends of the support fitting 20 in a tangential direction from the end edge side of the support fitting, and a gutter-shaped connecting portion 21 having a nut seat is provided on the sleeve side. It is formed by pressing so as to bulge outward from.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flexible hose made of plastic or rubber having a diameter of about 50 to 250 mm used for supplying and draining industrial water, and a joint for connecting the hose.

[0002]

[Prior art]

 As a joint for detachably connecting flexible hoses made of plastic or rubber, the ends of the two hoses to be connected are butted, and the outer surface of these butted parts is made of flexible plastic or rubber. It is known that a sleeve is attached and the sleeve is compressed from the outside so that the inner surface of the sleeve is brought into close contact with the outer surface of the hose.

4 and 5 show an example of such a joint structure. Reference numerals 11 and 12 denote hoses made of a synthetic resin such as polyvinyl chloride, and the outer surface of the butted portion is covered with a connecting outer sleeve 13 made of the same synthetic resin as described above. In this example, a reinforcing coil 14 made of a synthetic resin is wound around the outer surface of the outer sleeve 13 and is fixed by bonding to reinforce the outer sleeve 13. On the outside of the reinforcing coil 14, a pair of upper and lower fasteners 15, 15 formed by bending a strip plate made of metal such as iron or stainless steel into a semi-arc shape are attached, and both ends thereof are attached. The bolts 16 are inserted into the upper and lower parallel jaws 15a, 15a formed by bending outward, and the nuts 17 are fastened to fix the fasteners 15 described above.

[0004]

[Problems to be solved by the device]

 However, in the joint shown in FIGS. 4 and 5, the tightening metal 15 causes plastic deformation at the base of the jaw 15a due to the tightening pressure of the bolt 16 and the nut 17 during use. There is a problem that the above-mentioned tightening is loosened and a gap is formed between the outer surface sleeve 13 and the contact surfaces of the hoses 11 and 12 to cause water leakage. Then, in order to solve this problem, it was attempted to make the above-mentioned fasteners from a large-sized casting, but in this case, there was a problem that the manufacturing cost increased.

According to the invention, the outer sleeve can be detachably mounted on the outer sleeve so that the outer sleeve can be brought into close uniform contact with the hose, and the adhesive force does not decrease during use, which is easy to handle. It is intended to provide a hose joint that can reduce manufacturing costs.

[0006]

[Means for Solving the Problems]

 The joint for a hose of the present invention comprises a plastic or rubber sleeve that is attached to the abutting portions of the ends of two hoses made of plastic or rubber, and is detachably attached to the outer surface of the sleeve. In a hose joint consisting of a fastener for compressing to the center side, the above fastener is attached to a semi-cylindrical support fitting that covers almost the half circumference of the sleeve and the other half circumference of this support fitting and the sleeve. It consists of a steel rope that can be wrapped over, and nuts are fitted to the bolts connected to both ends of this steel rope, and the bolts are tangentially connected to both ends of the support fitting from the edge side of the support fitting. The gutter-shaped connecting part that can be inserted in the direction and has the receiving seat for the nut is formed by pressing so as to bulge outward from the sleeve side. And wherein the Rukoto.

The above-mentioned sleeve has a cylindrical shape made of plastic such as polyvinyl chloride or rubber such as natural rubber and synthetic rubber as in the conventional case, and has the reinforcing coil shown in FIGS. 4 and 5. Any of those that do not have may be used.

The above steel rope is made by twisting a plurality of steel strands into a strand and further twisting a plurality of the strands. The thickness of the strand, the number of strands, and the number of strands The number of twisted wires and the like are appropriately set depending on the diameter of the hose to be connected, the amount of water flowing in the hose, the pressure, and the like. The twisting direction when twisting the strands (bottom twisting) and the twisting direction when twisting the strands obtained by the twisting (top twisting) are set in opposite directions. Is preferably opposite to the thread direction of the bolt. That is, when the thread of the bolt is a normal right-hand thread (Z twist or right twist direction), S twist (left twist) is preferable as the upper twist of the steel rope.

The means for connecting the end portion of the steel rope to the base portion of the bolt may be any means that does not easily damage the connection portion, but it should be integrated with the bolt so that the center line is aligned with the base portion of the bolt. A structure in which the end portion of the rope is inserted into the formed steel bag portion and connected by caulking is preferable. Further, the length of the steel rope is preferably such that the steel rope can be wound at least once and a half times around the sleeve on which the support fittings are stacked.

[0010]

[Action]

 A semi-cylindrical support tool is placed on the upper half of the sleeve attached to the abutting part of the two hoses, and a steel rope is wound around the sleeve on which the support fitting is placed. One end and the other end of the support fitting Insert the bolts at one end and the other end of the steel rope from below into the gutter-shaped joints, and tighten the nuts at the tips of these bolts to tighten the steel rope and put the support bracket on the sleeve. The two hoses are connected to each other and closely attached to the surface. In this case, since the steel rope is a group of thin steel wires, it has less rigidity and is more flexible than a single steel round bar or flat plate having the same thickness. Therefore, when the steel rope is wound and tightened, the steel rope closely adheres to the surface of the support metal fittings and the sleeve, the gap between the sleeve and the hose disappears, and water leakage does not occur. Further, since the connecting portions at both ends of the support metal fitting are formed in a gutter shape in the tangential direction, they are not plastically deformed by the tension of the steel rope and the tension is not loosened.

However, when the steel bag portion is integrally formed on the base portion of the bolt so that the center lines thereof coincide with each other, and the end portion of the steel rope is inserted into the steel bag portion and caulked, the bolt is In addition, the steel ropes are connected so that their center lines coincide with each other and are firmly connected, and the above steel ropes do not come off easily, and the work is easy.

Further, when the length of the steel rope is such that it can be wound around the sleeve on which the support fittings are overlapped at least once and a half times, the adhesion between the sleeve and the hose becomes even better. . Also, if the direction of the twist of the steel rope is opposite to the screw direction of the bolt, when the nut is fitted into the bolt and tightened, the tightening direction is the direction of adding the twist of the steel rope. The nut is hard to loosen.

[0013]

【Example】

 In FIGS. 1 and 2, 11 and 12 are the hoses, 13 is a sleeve, and a substantially semi-cylindrical support fitting 20 made of a mild steel plate is laid on the upper half of the sleeve 13. At one end and the other end of the support metal fitting 20, the trough-shaped connecting portion 21 is formed by press-molding the end portion of the support metal fitting outward from the inside so that the axial direction of the connection fitting 21 is an edge of the support metal fitting 20. A semicircular hole 22 is formed in the tangential direction of the portion and is provided above the connecting portion 21. The connecting portion 21 at one end (left side in FIG. 2) and the connecting portion 21 at the other end (right side in FIG. 2) are provided at positions that are slightly displaced in the axial direction of the hoses 11 and 12. Further, the upper surface of the connecting portion 21 is formed flat so as to receive a washer 26 or a nut 27 described later.

As shown in FIG. 3, the steel rope 23 is obtained by twisting a plurality of steel wires together in the Z direction and twisting the obtained 6 strands together in the S direction. Both ends thereof are inserted into a cylindrical bag portion 25 integrally provided on the base portion of the bolt 24 along the center line of the bolt 24, and fixed by caulking the bag portion 25. In addition, 25a is a flat portion which is recessed in the outer surface of the bag portion 25 by the above-mentioned caulking, 26 is a washer, and 27 is a nut. The bolt 24 is engraved with a right-hand thread.

The steel rope 23 is made such that the length including the bag portions 25 at both ends is one and a half turns of the sleeve 13. As shown in FIGS. The bolt 24 is coiled around the sleeve 13, one end of the bolt 24 is inserted into the left connecting portion 21 from below, the other end bolt 24 is inserted into the right connecting portion 21 from below, and each bolt 21 is washer. A nut 27 is attached via 26, and by rotating the nut 27 to the right, the steel rope 23 is pulled to tighten the support fitting 20 and the sleeve 13, thereby connecting the two hoses 11 and 12. To be done.

For tightening the sleeve 13 having an outer diameter of 180 mm, a steel rope 23 having a diameter of 5 mm having the above-described structure is prepared, and an outer diameter of 11 mm is provided integrally with an end portion of a bolt 24 having an outer diameter of 8 mm and a length. The end of the steel rope 23 was inserted into the 40 mm bag 25 and caulked. Ten tensile tests were performed on the 10 steel ropes 23 thus obtained. The load required to remove the caulked portion was It was at least 850 kg, and when water was poured into the hose, it was confirmed that there was no water leakage and that it was practical.

[0017]

[Effect of device]

 According to the invention described in claim 1, a plastic or rubber sleeve is attached to the abutting portions of the ends of two hoses made of plastic or rubber, and the sleeve is detachably attached to the outer surface of the sleeve. In a hose joint consisting of a fastener for compressing a pipe, the fastener extends over a semi-cylindrical support fitting covering almost the half circumference of the sleeve and the other half circumference of the support fitting and the sleeve. A steel rope that can be wound around the steel rope.Nuts are fitted to the bolts connected to both ends of the steel rope, and the bolts are attached to both ends of the support bracket from the edge of the support bracket in the tangential direction. The gutter-shaped connecting part that can be inserted through the sleeve and has the receiving seat for the nut is formed by press work so as to bulge outward from the sleeve side. From above, wrap a steel rope around the sleeve on which the above-mentioned support fittings are stacked, insert the bolts at both ends into the connecting part of the support fitting, and tighten the nuts at the protruding ends of these bolts Connected.

In this invention, since the steel rope, which is a collection of thin steel wires, is wound, compared to the case where one steel round bar or flat plate having the same thickness is wound around the steel rope. It adheres well to the surface of the support metal fittings and the sleeve, so that the gap between the sleeve and the hose disappears and water leakage does not occur. Further, since the connecting portions at both ends of the support metal fitting are formed in a gutter shape in the tangential direction, the tensile force of the steel rope does not plastically deform to loosen the tension, and the durability is excellent. There is.

According to a second aspect of the invention, there is provided the steel bag according to the first aspect, wherein the end portion of the steel rope is formed integrally with the bolt by aligning the center line with the base portion of the bolt. Since it is inserted into the section and connected by caulking, it is easy to connect the steel rope and bolts, and the connection section is not easily damaged.

Further, in the invention described in claim 3, in the invention described in claim 2, since the steel rope is wound around the sleeve on which the support fittings are overlapped at least once and a half times, the sleeve The adhesion between the hose and the hose will be even better, and water leakage will be more reliably prevented.

Further, in the invention described in claim 4, in the invention described in claim 3, since the twist direction of the steel rope is opposite to the screw direction of the bolt, When the nut is fitted and fastened, the direction in which the nut is turned is the direction in which the steel rope is twisted, which makes it difficult for the nut to loosen.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a partially cutaway view of a connecting portion between a steel rope and a bolt.

FIG. 4 is a partially cutaway front view showing an example of a conventional joint.

5 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

11, 12: Hose, 13: Sleeve, 14: Reinforcing coil, 20: Support metal fitting, 21: Gutter-shaped connecting portion, 22:
Hole, 23: steel rope, 24: bolt, 25: bag part, 2
6: Washer, 27: Nut.

Claims (4)

[Scope of utility model registration request] 1. A sleeve made of plastic or rubber that is attached to the abutting portions of the ends of two hoses made of plastic or rubber, and a sleeve detachably attached to the outer surface of the sleeve with the sleeve facing the center. In a hose joint consisting of a fastener for compression, the fastener is wrapped around a semi-cylindrical support fitting covering almost the half circumference of the sleeve and the other half circumference of the support fitting and the sleeve. A steel rope that can be used, and nuts are fitted to the bolts connected to both ends of this steel rope, and the bolts are inserted tangentially from the end edge side of the support bracket into both ends of the support bracket. And a gutter-shaped connecting portion having the above-mentioned nut receiving seat is formed by press work so as to bulge outward from the sleeve side. Hose fitting. 2. The steel rope is inserted into a steel bag portion integrally formed with the bolt with its center line aligned with the base portion of the bolt, and is connected by caulking the bag portion. The hose joint described. 3. The hose joint according to claim 2, wherein the steel rope is wound around the sleeve on which the support fittings are stacked at least once and a half times. 4. The hose joint according to claim 3, wherein the twist direction of the steel rope is opposite to the screw direction of the bolt.