JPH11248084A - Pin hole repairing jig and pin hole repairing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and perfectly close a pin hole and to improve appearance after repairing by furnishing a pin hole expansion tool, an inside rivet to fasten a core in accordance with extraction of the expansion tool and an outside rivet. SOLUTION: A head end part 21b is drilled and pierced in a pin hole b and expanded by setting a drilling and piercing member 21 on an expansion tool 21. The drilling and piercing member 21a is extracted, and an inside rivet 24 with an adhesive 31 applied on it is inserted into a packing umbrella part 28a. A packing 28 is projected with a plug part 26 from a head end part 23a of the expansion tool and projected into the inside of a hose (a). When the expansion tool 21 is extracted, the hose (a) contracts in diameter by elastic restoring force and fastens a core 25. The core 25 is drawn to the front and the plug part 26 is connected to a peripheral edge part of the pin hole (b) through the packing 28. Thereafter, an outside rivet 29 with the adhesive 31 applied to it is fitted from the base end side of the core 25, and after an engagement step part is press fitted and engaged with a ring protruded part 27a, the core 25 is cut off from a cutting groove 27b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinhole repair jig for an elastic member such as a hose for closing a pinhole opened in a fire hose and a pinhole repair method.

[0002]

2. Description of the Related Art For example, a fire hose comprises a jacket in which a warp and a weft made of synthetic fibers are woven in a cylindrical shape, and a rubber or synthetic resin lining layer lined on the inner surface of the jacket. Fire hose
Because it is long, it is folded or wound up on a drum and mounted on a fire truck bed or the like. When a fire occurs, the fire engine rushes to the site, pulls out the fire hoses mounted on the carrier, connects a plurality of fire hoses with connecting fittings, extends them, and performs fire fighting activities.

[0003] Therefore, fire hoses are required to be light in weight, and although the lining layer is made as thin as possible, a large pulling force is applied by dragging the fire hoses on the road surface during a fire extinguishing activity, or the vehicle travels by stepping on. Severe use conditions, such as doing so, have been forced. For this reason, the jacket is damaged, and a pinhole is generated in the lining layer through the jacket, and water often leaks from the pinhole during water supply.

[0004]

When a pinhole occurs in a fire hose as described above, disposal of the fire hose causes a global environmental problem and is uneconomical. Therefore, repairs for closing the pinholes are performed and reused. Generally, a canvas coated with glue rubber is attached to the outside of the jacket corresponding to the pinhole position, but the outer layer has a jacket that cannot completely close the pinhole, preventing water leakage completely. Can not. Further, when the adhesive rubber is dried and hardened, the fire hose at the repaired portion becomes hard, which makes handling such as folding and winding difficult, and has a problem that the appearance is poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pinhole repairing device which can easily and completely close a pinhole and which has a good appearance after repair. Tool and pinhole repair method.

[0006]

According to the present invention, in order to achieve the above object, a first aspect of the present invention is to provide a cylindrical expander for expanding a pinhole by inserting the pinhole into an elastic member, and a tip of a core material. The plug has a plug portion having a larger diameter than the pinhole before expansion, is inserted into an elastic member by using the expansion tool as a guide, and the core material is tightened by the pinhole whose diameter is reduced as the expansion tool is removed. An inner rivet in which the plug portion is joined to the inner surface of the elastic member at the periphery of the pinhole; and an outer rivet connected to the core and joined to the outer surface of the elastic member at the periphery of the pinhole. An elastic member pinhole repair jig characterized by the following.

A second aspect of the present invention is characterized in that a packing is provided on a portion of the plug portion facing the inner surface of the elastic member. A third aspect of the present invention is characterized in that the core material according to the first aspect is provided with a cutting groove that is cut by bending after holding the elastic member between the inner rivet and the outer rivet.

According to a fourth aspect of the present invention, there is provided an outer cylinder having an opening at a distal end portion and a proximal end portion, the distal end portion being inserted into a pinhole of an elastic member to expand the pinhole, and an opening at the distal end portion and the proximal end portion. Having an inner cylinder inserted into the outer cylinder, a rod-shaped core that can be inserted into and removed from the inner cylinder, and an inner cylinder that is provided at the distal end of the core and is inserted using the outer cylinder as a guide. A dish-shaped inner rivet that elastically deforms into a cylindrical shape by the relative movement in the axial direction and passes through the pinhole, and after passing through, elastically restores to a dish-like shape and faces the inner surface of the elastic member at the periphery of the pinhole, A pinhole repair jig comprising: a dish-shaped outer rivet that faces an outer surface of an elastic member at a peripheral portion of the pinhole using the core material as a guide and sandwiches the elastic member together with the inner rivet. .

A fifth aspect of the present invention is characterized in that a fitting groove into which an inner rivet and an outer rivet are fitted is provided at a tip portion of the core material according to the fourth aspect. A sixth aspect of the present invention is characterized in that a cutting groove which is cut by bending after holding the elastic member between the inner rivet and the outer rivet is provided at a tip portion of the core material of the fourth aspect.

A first step of inserting the distal end of the outer cylinder having openings at the distal end and the proximal end into the pinhole of the elastic member to expand the pinhole; An inner cylinder and a core having an inner rivet provided at the distal end of a rod-shaped core inserted into an inner cylinder having an opening at an end are inserted through an opening at a base end of the outer cylinder to pin the inner rivet. A second step of causing the inner rivet to face the inner surface of the elastic member at the periphery of the pinhole by passing through the elastic member and restoring it in the shape of a dish inside the elastic member, and extracting the outer cylinder from the pinhole together with the inner cylinder. A third step of reducing the diameter of the elastic member and bringing the outer rivet into contact with the outer surface of the elastic member at the periphery of the pinhole using the core material as a guide, and clamping the elastic member together with the inner rivet; Outer core In pinhole repair method being characterized in that; and a fifth step of cutting in the vicinity of and.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment, FIG. 1 shows a pinhole repair jig for repairing a pinhole of a fire hose, and FIG. 2 shows a pinhole repair method. As shown in FIG. 1, the pinhole repair jig includes an expansion tool 21, a puncture member 21 a, and a repair jig main body 22.

First, the expansion tool 21 will be described. The expansion tool 21 is formed of a metal cylinder and has a distal end 23a.
And an opening in the base end 23b, the tip 23a is formed in a tapered shape toward the tip, and an outer peripheral surface of the tip 23a is provided with a pinhole b of the fire hose a as an elastic member. An annular groove 23c that engages with the lip is provided. Further, the base end portion 23b is formed in a tapered shape whose diameter increases toward the base end side.

Next, the repair jig main body 22 will be described. The repair jig main body 22 includes a metal rod-shaped core material 25,
The core 25 has an inner rivet 24 formed integrally with a disc-shaped plug 26 having a diameter larger than that of the pinhole b before expansion and formed integrally with the tip of the core material 25.

An annular convex portion 27a is formed on the distal end side of the core member 25 at a position closer to the plug portion 26 than the plug portion 26, and an annular cutting groove 27b is provided at the proximal side adjacent to the convex portion. Cutting groove 27b
Is formed by making an annular cut in the outer periphery of the core material 25, and the core material 25 can be easily cut by applying a bending force to the core material 25.

Furthermore, an umbrella-shaped packing 2 made of synthetic resin or rubber having elasticity is provided on the proximal side surface of the plug portion 26.
The packing 28 has a core material 25 fixed thereto.
An umbrella-shaped portion 28b is provided integrally with a cylindrical portion 28a that covers the outer peripheral surface of the distal end portion.

In the figure, 29 is an outer rivet,
For example, the packing 28 is formed in the same shape as the packing 28 by a synthetic resin,
In the inner peripheral surface of the fitting hole 30, there is provided an engaging step portion 30a which press-fits and engages with the annular convex portion 27a of the core material 25.

Next, using the pinhole extending tool 21 and the repair jig body 22 constructed as described above, the fire hose a
A method of repairing (closing) the pinhole b will be described with reference to FIG. The fire hose a is composed of a jacket and a lining layer of rubber or the like lined on the inner surface of the jacket.

First, as shown in (a), when the puncture member 21a is set on the expansion tool 21 and the tip portion 21b is punctured from outside the fire hose a into the pinhole b, the tip portion 21b
Is expanded with insertion since it is formed in a tapered shape. As shown in (b), when the extension tool 21 is further inserted deeply, the rim of the pinhole b becomes the annular groove 2 of the extension tool 21.
The extension 21 is engaged with the fire hose a.

Next, with the extension tool 21 held down, the puncture member 21a is pulled out and an adhesive 31 is applied to the proximal side surface of the umbrella-like portion 28a of the packing 28, and then the inner side is inserted from the base end 23b of the extension tool 21. The rivet 24 is inserted into the extension 21.
Since the umbrella-shaped portion 28b of the packing 28 of the inner rivet 24 is formed to be larger in diameter than the inner diameter of the expansion device 21, the umbrella-shaped portion 28b of the packing 28 is elastically deformed toward the hand. When the inner rivet 24 is inserted deeper into the expansion tool 21, the packing 28 projects together with the plug 26 from the distal end 23a of the expansion tool 21 and into the fire hose a.

Next, when the extension tool 21 is removed from the pinhole b, the fire hose a is reduced in diameter by the elastic restoring force,
As shown in (c), the core 25 is tightened by the edge of the pinhole b. Then, when the core material 25 is pulled toward the user, the plug portion 26 is pressed against the peripheral portion of the pinhole b on the inner surface of the fire hose a via the packing 28,
The packing 28 is adhered by an adhesive 31.

Next, the outer rivet 29 to which the adhesive 31 has been applied is fitted from the base end of the core 25 and the outer rivet 29 is slid toward the outer surface of the fire hose a with the core 25 as a guide. Is engaged with the annular convex portion 27a of the core member 25 by press-fitting, and the outer rivet 29 is connected to the pinhole b on the outer surface of the fire hose a.
Is bonded by an adhesive 31 to the peripheral portion of.

Next, as shown in (d), the base end of the core material 25 is bent in the direction of the arrow to cut the core material 25 from the cutting groove 27b and shortened. Is closed. The plug 26 at the end of the core material 25 that has closed the pinhole b is joined to the inner surface of the fire hose a via the packing 28, and the outer rivet 29 is joined to the outer surface of the fire hose a.

Accordingly, the core material 25 does not come off in the thickness direction of the fire hose a, completely closes the pinhole b, and can prevent water leakage. Further, although the core 25 is hard, the repair portion of the fire hose a does not become hard because the core 25 and the plug 26 having the pinhole b are extremely small, so that the fire hose a is wound up. It does not hinder folding and handling, and does not impair the appearance of the fire hose a.

FIG. 3 shows the inner rivet 24 of the first embodiment.
(A) replaces the packing 28 with O
A ring 32 is provided, and (b) a flat packing 33 is provided.

FIG. 4 shows a modified example of the outer rivet 29 of the first embodiment.
And the outer rivet 29 is provided with a screw portion 35 to be screwed to the screw portion 34. 4B, the core 25 is formed of a soft metal such as aluminum, the outer rivet 29 is formed of a hard metal such as steel, and a screw portion 36 is provided to bite into the core 25 and fix it. FIG. 3C shows an end of the core 25 plastically deformed by a punch 37 and joined to the outer rivet 29.

FIGS. 5 to 7 show a second embodiment, and FIGS.
FIG. 2A shows a pinhole repairing jig. FIG. 1A shows a pinhole extending tool 1 and FIG. 1B shows a repairing jig main body 2. First,
Explaining from the pinhole extender 1, the pinhole extender 1 includes a metal outer cylinder 3 and a metal puncture member 4, and the outer cylinder 3 has openings at the distal end 3a and the proximal end 3b. The tip 3a is tapered toward the tip, and a fire hose a
An annular groove 5 is provided which engages with the lip of the pinhole b. A male screw 6 is provided on the outer peripheral surface of the base end 3 b of the outer cylinder 3.

The puncture member 4 is inserted from the proximal end 3b of the outer cylinder 3 so that the distal end 4a becomes the distal end 3a of the outer cylinder 3.
And the distal end portion 4a is formed at a sharp point toward the distal end. At the base end 4b of the puncturing member 4, a fitting recess 7 is formed to fit into the base end 3b of the outer cylinder 3. In this fitting recess 7, a female screw 8 screwed with the male screw 6 of the outer cylinder 3 is formed. Is provided.

Next, the repair jig main body 2 will be described. The repair jig main body 2 is composed of a metal inner cylinder 9 and a metal rod-shaped core 10, and the inner cylinder 9 is inside the outer cylinder 3. It has an outer diameter that fits tightly on the peripheral surface, and can be inserted and removed in the axial direction with respect to the inner cylinder 9. Further, the distal end portion 9a and the proximal end portion 9
b has an opening, and the tip 9a is the tip 3a of the outer cylinder 3.
Is formed in a tapered shape in accordance with the shape of the above, and a concave portion 9c having a streamlined cross section is formed on the inner peripheral surface.

An annular fitting groove 11 is provided at the tip end portion 10a of the core material 10, and a first fitting groove 11 is provided adjacent to the annular groove 11.
Cutting groove 12 is provided. Further, a second cutting groove 13 is provided at a substantially middle portion in the longitudinal direction of the core material 10. The first and second cutting grooves 12 and 13 are formed by making annular cuts in the outer periphery of the core material 10,
By applying a bending force to 0, it can be easily cut.

A dish-shaped inner rivet 14 made of a flexible synthetic resin or rubber is fitted in the fitting groove 11 of the core material 10. The inner rivet 14 has a curved surface 14a that is concave toward the base end 10b of the core 10 in a free state.
have. When the core material 10 is retracted by holding the base end portion 10b, the curved surface 14a of the inner rivet 14 comes into contact with the distal end portion 9a of the inner cylinder 9, and when the core material 10 is further retracted, the distal end portion 9a of the inner cylinder 9 The inner rivet 14 is pushed in the distal direction, and is elastically deformed into a cylindrical shape with its central portion serving as a fulcrum, and is joined to the concave portion 9c of the inner cylinder 9,
At this time, the second cutting groove 13 and the base end face of the inner cylinder 9 are aligned.

Next, a method of repairing (closing) the pinhole b of the fire hose a using the pinhole extending tool 1 and the repair jig main body 2 configured as described above will be described with reference to FIG. . The fire hose a is composed of a jacket and a lining layer of rubber or the like lined on the inner surface of the jacket.

First, as shown in (a), the puncture member 4 is inserted from the base end 3b of the outer cylinder 3, and the distal end 4a is projected from the opening of the distal end 3a of the outer cylinder 3, so that the puncture member 4 is removed. By turning, the female screw 8 of the fitting recess 7 is screwed with the male screw 6 of the outer cylinder 3 to integrally connect the outer cylinder 3 and the puncture member 4. Since the tip 4a of the puncture member 4 has a sharp pointed tip, the tip is punctured into the pinhole b from outside the fire hose a.

Further, when the puncture member 4 is inserted deeply, the pinhole b is gradually expanded by the taper, and the edge of the pinhole b engages with the annular groove 5 of the outer cylinder 3 and the fire hose a
The outer cylinder 3 is held. Next, with the outer cylinder 3 held down, the puncture member 4 is turned in the opposite direction to rotate the female screw 8 and the male screw 6.
Is released, and the puncture member 4 is pulled out of the outer cylinder 3.

On the other hand, the repair jig main body 2 is in a state in which the core material 10 is inserted into the inner cylinder 9 as shown in (b), and after the adhesive 15 is applied to the curved surface 14a of the inner rivet 14. When the core material 10 is retracted by holding the base end portion 10b, the curved surface 14a of the inner rivet 14 is
Contact with a. When the core material 10 is further retracted, (c)
As shown in (1), the inner rivet 14 is pushed in the distal direction by the distal end portion 9a of the inner cylinder 9, and is elastically deformed into a cylindrical shape with the central portion as a fulcrum, and joined to the concave portion 9c of the inner cylinder 9. At this time, since the second cut groove 13 and the base end face of the inner cylinder 9 coincide with each other, the base end 10 Ob of the core 10 is bent in the direction of arrow A to cut the core 10 from the second cut groove 13 to shorten it. .

Next, as shown in (d), when the repair jig main body 2 is inserted into the outer cylinder 3, the inner cylinder 9 of the repair jig main body 2 is inserted.
Is in close contact with the inner peripheral surface of the outer cylinder 3. Next, the outer cylinder 3
To the connecting member 16. The connecting member 16 has a cylindrical shape with a bottom. A female screw 17 is provided on the inner peripheral surface of the connecting member 16, and a main pillar 18 is provided at the center of the bottom.
When the female screw 17 is screwed into the male screw 6 of the outer cylinder 3 by turning the connecting member 16, the main column 18 abuts on the base end surface of the core 10 and presses the core 10 in the direction of the distal end 10 a.

Therefore, as shown in FIG.
The inner rivet 14 is moved forward with respect to the inner cylinder 9.
Escape from the recess 9c. Inner rivet 14 is concave 9c
, The inner rivet 14 passes through the pinhole b and is located inside the fire hose a, and the curved surface 14a elastically restored to a dish shape and coated with the adhesive 15 faces the inner surface of the fire hose a.

Next, as shown in FIG.
, The annular groove 5 of the outer cylinder 3 is disengaged from the edge of the pinhole b, and the outer cylinder 3 and the inner cylinder 9 integrally escape from the core material 10. Therefore, the expanded pinhole b is elastically restored and contracted, and the rim of the pinhole b comes into close contact with the outer peripheral surface of the front end portion 10a of the core material 10.

Next, as shown in (g), an outer rivet 19 having a curved surface 19a coated with an adhesive 15 is fitted to the base end 10b of the core material 10. The outer rivet 19 is made of the same material and has the same shape as the inner rivet 14. The outer rivet 19 is pushed in the direction of the tip 10 a of the core 10 by a pushing jig 20 a fitted to the core 10. At this time,
By providing the receiving stand 20b on the opposite side of the pushing jig 20a, the fire hose a becomes flat and the inner rivet 1
4 is in a state of being sandwiched by the lining layers of the fire hose a.

As shown in (h), when the outer rivet 19 passes over the first cutting groove 12, it falls into the fitting groove 11, and finally the inner rivet 14 is moved by the pushing jig 20a and the pedestal 20b. By sandwiching the outer rivet 19, the inner rivet 14 and the outer rivet 19 are bonded and fixed to the inner and outer surfaces of the fire hose a around the pinhole b.

Next, when the core material 10 is bent in the direction of arrow B, as shown in FIG. 7, the core material 10 is cut from the first cut groove 12, and the pinhole b is closed with the tip portion 10a of the remaining core material 10. State. Heartwood 1 closing pinhole b
The inner end rivet 14 and the outer rivet 19 fitted in the fitting groove 11 do not come off the front end 10a of the zero in the axial direction (thickness direction of the fire hose a). Can be prevented.

The core 10 is hard, but the tip 10a of the core 10 closing the pinhole b has a very small area, and the inner rivet 14 and the outer rivet 19 are flexible. The repaired portion does not become hard, does not hinder winding, folding and handling of the fire hose a, and does not impair the appearance of the fire hose a.

In the above embodiment, the core material 10
Although the fitting groove 11 is provided in the front end portion 10a and the inner rivet 14 is fitted in the fitting groove 11, a flexible inner rivet may be provided integrally with the core material 10. The curved surface 14a of the inner rivet 14 and the curved surface 1 of the outer rivet 19
Although the adhesive 15 is applied to 9a, the adhesive 15 is not necessarily applied.

In the above-described embodiment, the repair of the pinhole of the fire hose has been described. However, the repair jig of the present invention can be applied to any of the elastic synthetic resin hoses, rubber hoses, rubber boats, air tents and other pinholes. Applicable for repair.

[0044]

As described above, according to the present invention, the pinhole can be easily and completely closed, and the core material that closes the pinhole has a very small area, and the inner rivet and the outer rivet Because it is flexible, the repaired parts will not be hard, and even if used for fire hoses, it will not hinder winding, folding and handling, and it will also impair the appearance of fire hoses There is no effect.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a pinhole repair jig showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a pinhole repair method according to the embodiment;

FIG. 3 is a semi-vertical side view showing a modified example of the inner rivet of the embodiment.

FIG. 4 is a semi-longitudinal side view showing a modified example of the outer rivet of the embodiment.

FIG. 5 is a longitudinal side view of a pinhole repair jig showing a second embodiment of the present invention.

FIG. 6 is an explanatory view showing a pinhole repair method according to the embodiment;

FIGS. 7A and 7B show the fire hose after pinhole repair according to the embodiment, wherein FIG. 7A is a front view and FIG. 7B is an enlarged cross-sectional view of the pinhole portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Expansion tool 24 ... Inner rivet 25 ... Core material 26 ... Plug part 27b ... Cutting groove 28 ... Packing 29 ... Outer rivet

Claims (7)

[Claims] 1. A tubular expansion device for expanding a pinhole by being inserted into a pinhole of an elastic member, and a plug having a diameter larger than that of the pinhole before expansion at an end of a core material, wherein the expansion device is provided. An inner rivet, which is penetrated by an elastic member as a guide, and the core is tightened by a pinhole that is reduced in diameter as the dilator is pulled out, and the plug is joined to an inner surface of the elastic member at a peripheral portion of the pinhole; An outer rivet connected to the core and joined to an outer surface of an elastic member at a peripheral portion of the pinhole. 2. The pinhole repair jig according to claim 1, wherein a packing is provided at a portion of the plug portion facing the inner surface of the hose. 3. The pinhole repair jig according to claim 1, wherein said core member is provided with a cutting groove which is cut by bending the elastic member between the inner rivet and the outer rivet and then bending the elastic member. 4. An outer cylinder having an opening at a distal end portion and a proximal end portion to extend the pinhole by inserting the distal end portion into a pinhole of an elastic member, and an opening at the distal end portion and the proximal end portion. Then, an inner cylinder inserted into the outer cylinder, a rod-shaped core material that can be inserted into and removed from the inner cylinder, and an axial direction of an inner cylinder that is provided at a distal end portion of the core material and inserted by using the outer cylinder as a guide. After passing through the pinhole, it is elastically deformed into a cylindrical shape by the relative movement, and after passing through, elastically restores to a dish-like shape, and a dish-shaped inner rivet facing the inner surface of the elastic member at the periphery of the pinhole; and A pinhole repair jig comprising: a guide-shaped outer rivet that faces an outer surface of a hose at a peripheral portion of the pinhole and that sandwiches an elastic member together with the inner rivet. 5. The pinhole repair jig according to claim 4, wherein a fitting groove into which an inner rivet and an outer rivet are fitted is provided at a tip portion of said core material. 6. The pinhole repair according to claim 4, wherein a cutting groove is provided at a tip portion of the core material, the cutting groove being cut by bending after holding an elastic member by an inner rivet and an outer rivet. jig. 7. A first step of expanding a pinhole by inserting a distal end of an outer cylinder having an opening at a distal end and a proximal end into a pinhole of an elastic member; An inner cylinder and a core provided with an inner rivet at the tip of a rod-shaped core inserted into the inner cylinder having an opening are inserted through the opening at the base end of the outer cylinder, and the inner rivet passes through the pinhole. A second step of causing the inner rivet to face the inner surface of the elastic member at the peripheral edge of the pinhole by resiliently restoring into a dish shape inside the elastic member, extracting the outer cylinder from the pinhole together with the inner cylinder, and reducing the pinhole. A third step of bringing the outer rivet into contact with the outer surface of the elastic member at the peripheral portion of the pinhole by using the core material as a guide, and clamping the elastic member together with the inner rivet; Near outer rivets In pinholes repairing method of the fifth step of cutting, characterized by comprising a.