JPH075350Y2 - Spiral reinforced hose fittings - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a spiral reinforced hose joint, more specifically, a spiral reinforced hose having pressure resistance and a device, machinery, etc. for pumping high-pressure fluid to the hose. It relates to a joint used for connection.

(Prior Art) This kind of spiral reinforcing hose has a structure in which a metal or synthetic resin reinforcing wire is embedded in a spiral shape in a hose body molded of a soft resin material.

(Problems to be solved by the invention) Since this spiral reinforced hose is highly rigid and the end part is difficult to expand and deform, once the connecting end is heated with a burner or softened in hot water, oil is applied. Then, the connecting tube portion of the joint is forcibly inserted, and the band is further tightened to connect with the joint. However, it requires a work to soften the hose connection end, and the connection work is troublesome. If the softening is insufficient, there is a possibility that the hose connecting end of the joint tube portion of the joint that is forcibly inserted may be cut off and liquid may leak.

The present invention has been made in view of the above conventional circumstances, and its purpose is to also serve as a seal that bulges radially in a portion to be inserted into the connecting end of the spirally reinforced hose and closely adheres to the inner peripheral surface of the connecting end of the hose. It is an object of the present invention to provide a joint for a spirally reinforced hose provided with a stopper.

(Means for Solving the Problem) The technical means taken to achieve the above-mentioned object is to insert the insertion tube portion loosely fitted in the connection end of the spiral reinforcement hose and the insertion end corresponding to the connection end of the hose. Provided on the outer peripheral surface of the joint body between the joint main body having a guide screw portion provided on the outer peripheral surface portion of the tubular portion, the stopper portion provided around the insertion tubular portion, and the guide screw portion of the stopper portion. A sealing body formed of an elastic material, and a fastening metal fitting that is screwed to the guide screw portion and has a pressing cylinder portion that enters the hose and crushes the sealing body. Is the gist.

(Operation) According to the above technical means, the seal body sandwiched by the pressing cylinder portion of the tightening fitting and the stopper portion is crushed by the leading end of the cylinder portion and bulges in the radial direction, Push the inner surface of the spiral reinforcement hose up to connect it.

(Effect of the Invention) Since the present invention is configured as described above, it has the following advantages.

Since the spiral reinforcing hose can be connected to the spirally reinforced hose without causing liquid leakage by simply rotating the tightening fitting, the connection is simple and simple.

Since the pressing cylinder is simply loosely fitted to the connection end of the spiral reinforcement hose, the connection end of the hose is not damaged by the cylinder at the time of insertion, and the durability is not deteriorated.

(Example) Next, the Example of this invention is described based on drawing.

1 to 3 show the first embodiment, and FIG. 4 shows the second embodiment.

In FIGS. 1 to 3, A is a spiral reinforcing joint, which is composed of a joint main body a ₁ and a fastening metal fitting a ₂ .

The joint body a ₁ is provided with a connection tube portion 2 connected to a device or a machine for pressure-feeding the hose B at the tip of the insertion tube portion 1 loosely fitted in the connection end of the spiral reinforcement hose B. Have one.

A stopper portion 3 is provided around the tip of the insertion tube portion 1, and a guide screw portion 4 is engraved on the outer peripheral surface portion corresponding to the connection tube of the hose B. Further, the stopper portion 3 and the guide screw portion 4 are provided. A seal body 5 formed of an elastic material is provided between the two.

The stopper portion 3 is a collar 3b interposed between a seal ring 5 and a stop ring 3a fixed to the inner end of the insertion tube portion 1.
It consists of

The seal body 5 is fitted to a portion of the insertion tube portion 1 between the collar 3b and the guide screw portion 4, or is fixed so as to cover the same portion in the circumferential direction.

The tightening metal fitting a ₂ is a flanged nut composed of a pressing cylinder portion 6 and a nut portion 7 which are screwed into the guide screw portion 4 and enter from the connecting end of the hose B.

Out of the stopper portion 3, the seal body 5, and the pressing cylinder portion 1, the outer diameter of the insertion cylinder portion 1 is adjusted so that the maximum diameter thereof matches the spiral reinforcement hose B having the smallest diameter with large variation in the inner diameter tolerance. It is set.

Then, when the insertion tube portion 1 provided with the stopper portion 3, the seal body 5, and the fastening metal fitting a ₂ is inserted into the connection end of the spiral reinforcing hose B and the nut portion 7 is fastened, the fastening hardware The seal body 5 bulges in the radial direction by being crushed by the tip of the pressing cylinder portion 6 of a ₂ and the collar 3b of the stopper portion 3 and elastically spreads the spiral reinforcing hose B to form a seal / prevention prevention portion. To do.

Figure 4 is an embodiment in which the circumferentially provided with projections 8 of bamboo shoots shape on the outer peripheral surface each of the pressing tube part 6 of collar 3b and fastening fittings a ₂ of Example.

In the case of this embodiment, since the protrusion 8 on the outer peripheral surface of the collar 3b has a downward slope toward the inner end side of the insertion tube portion 1 as shown in the figure, the protrusion 8 guides the insertion. When the tubular portion 1 is easily inserted into the connection end of the hose B and is fastened with the fastening band 9 to further increase the connection strength, the spiral reinforcing hose B is inserted into the front and rear projections 8 and 8 that sandwich the seal body 5. However, there is an advantage that the connection is stronger.

[Brief description of drawings]

The drawings show an embodiment of a spiral reinforced hose joint of the present invention, FIG. 1 is a vertical cross-sectional view of the first embodiment, showing a state before tightening a fastening metal fitting, and FIG. 2 is the same vertical cross-sectional view. Third, showing connection status
The drawing is an enlarged sectional view taken along line (3)-(3), and FIG. 4 is a longitudinal sectional view of the second embodiment, showing a connected state. In the figure, B: Spiral reinforcement hose, a ₁ : Fitting body 1: Insert tube part, 4: Guide screw part 3: Stopper part, 5: Seal body a ₂ : Tightening fitting, 6: Pressing cylinder part A: Spiral reinforced hose fittings

Claims (1)

[Scope of utility model registration request] 1. A joint body having an insertion tube portion loosely fitted in a connection end of a spiral reinforcing hose and a guide screw portion provided on an outer peripheral surface portion of the insertion tube portion corresponding to the connection end of the hose. A sealing member formed of an elastic material, which is provided on the outer peripheral surface of the joint body between the stopper portion provided around the insertion tube portion and the guide screw portion of the stopper portion, and the guide screw portion. A joint for a spirally reinforced hose, which is attached to the spiral hose, and which comprises a pressing metal fitting having a pressing cylinder portion that is inserted into the hose and crushes the seal body.