JP4467289B2 - Plug-in female fitting - Google Patents

Description

  The present invention constitutes a part of an insertion-type coupling fitting used to connect a fire hose and a fire hydrant valve, or to connect fire hoses together, and the end of the fire hose. It is related with improvement of the insertion type female metal fitting detachably inserted in the insertion type male metal fitting 2 connected to the discharge port of the fire hydrant valve and the end of the fire hose.

  In general, a joint fitting that connects a fire hose and a fire hydrant valve, or between fire fighting hoses, etc. includes a plug-in female fitting connected to the end of the fire hose, a discharge port of the fire hydrant valve, and a fire hose. A Machino-type (registered trademark) coupling metal fitting is widely used, which is composed of an insertion-type male metal fitting that is connected to an end portion of the female metal fitting and detachably inserted into the female metal fitting (for example, see Patent Document 1). . This fitting has the advantage that the connection and separation of the fire hose and the fire hydrant valve can be performed with one touch.

2. Description of the Related Art Conventionally, as a plug-in type female fitting 10 used for a coupling fitting, one having a structure shown in FIGS. 5 to 7 is known.
That is, the female metal fitting 10 has a cylindrical connecting portion 11a connected to the fire hose H at one end, and a cylindrical shape having a larger diameter than the connecting portion 11a at the other end and connected to the connecting portion 11a. A receiving metal fitting 11 provided with a receiving opening 11b, a cylindrical fastening ring 12 removably screwed to the outer peripheral surface of the receiving opening 11b of the receiving fitting 11, and an annular claw fitted in the fastening ring 12. A seat 13, a plurality of arcuate claws 14 that are disposed at equal angles on the claw seat 13 and can protrude inwardly of the claw seat 13, and are interposed between the fastening ring 12 and the claw 14. It comprises a plurality of leaf springs 15 for urging the claw 14 inward of the claw seat 13.
Further, the claw seat 13 has a plate-shaped ring portion 13a and a plurality of arc-shaped and plate-shaped portions that are connected to one side of the ring portion 13a at equal angles and regulate the amount of protrusion of the claw 14 inward. The fastening ring 13 is formed by a locking portion 13b and a plurality of notches 13c formed between the locking portions 13b so that the claw 14 can be fitted in the inside of the claw seat 13 so as to protrude inward. By being screwed onto the outer peripheral surface of the receiving portion 11 b of the metal fitting 11, the metal plate is accommodated while being held between the receiving port portion 11 b of the metal fitting 11 and the fastening ring 12.
Further, the leaf spring 15 is pinned to the outer peripheral surface of the claw 14 at the center thereof, and when the claw 14 is fitted into the notch 13c of the claw seat 13 fitted in the fastening ring 12, Both end portions of the leaf spring 15 are in elastic contact with the inner peripheral surface of the fastening ring 12 to urge the claw 14 inward.
In FIG. 5, 11c is a male screw formed on the outer peripheral surface of the receiving port portion 11b, 12a is a female screw formed on the inner peripheral surface of the fastening ring 12 and screwed into the male screw 11c of the receiving port portion 11b, 16 Is a U-shaped packing fitted in the inner peripheral surface of the receiving port portion 11b.

By the way, in the conventional female metal fitting 10, the center portion of the leaf spring 15 is pinned to the claw 14 in advance by the pin 17, and both end portions of the leaf spring 15 are elastically brought into contact with the inner peripheral surface of the fastening ring 12. Therefore, when the claw 14 with the leaf spring 15 is fitted into the notch 13c of the claw seat 13 and the claw seat 13 is fitted into the fastening ring 12, both end portions of the leaf spring 15 as shown in FIG. Projecting outward from the claw seat 13, the leaf spring 15 becomes in the way, and the claw seat 13 cannot be fitted into the fastening ring 12 smoothly and quickly. Therefore, in the conventional female metal fitting 10, after the nail seat 13 is fitted into the fastening ring 12, the claws 14 with the leaf springs 15 must be fitted into the notches 13c of the nail seat 13 one by one. There is a problem that the assembly is complicated. However, since the leaf spring 15 must be fixed to the claw 14 with the pin 17, the number of processing steps is increased and the assembly becomes more complicated.
Further, in the conventional female metal fitting 10, the central portion of the leaf spring 15 is fixed to the claw 14 with the pin 17 and both end portions of the leaf spring 15 are brought into contact with the inner peripheral surface of the fastening ring 12. A certain space in which the leaf spring 15 can be elastically deformed must be formed between the locking portion 13 b of the seat 13 and the inner peripheral surface of the fastening ring 12. For this reason, the thickness of the locking portion 13b of the nail seat 13 cannot be increased so much, and there is a problem that the thickness of the nail seat 13 is reduced and the strength is inferior.
Further, the conventional insertion-type female metal fitting 10 has a configuration in which the claw seat 13 into which a plurality of claws 14 are fitted is held between the end face of the receiving port 11b of the metal fitting 11 and the fastening ring 12. However, there is a problem that the metal fitting 11 and the fastening ring 12 have to be formed separately, which increases the number of parts, further complicates the assembly, and increases the cost.
JP-A-8-336613

  The present invention has been made in view of such problems, and its purpose is to provide an insertion-type female metal fitting capable of simplifying assembly, reducing the number of parts, improving strength, and the like. There is to do.

In order to achieve the above object, the invention of claim 1 of the present invention comprises a cylindrical connecting portion connected to a fire hose, and a cylindrical receiving portion connected to this and having a larger diameter than the connecting portion. The support bracket provided, a cylindrical fastening ring formed integrally with the receiving portion of the support fitting, an annular claw seat detachably screwed in the fastening ring, and an equiangular arrangement on the claw seat A plug-in type consisting of a plurality of arc-shaped claws that can be projected inwardly of the nail seat and a plurality of leaf springs that are locked to the nail seat and bias each nail toward the inside of the nail seat In the female metal fitting, the claw seat has an arcuate shape in which a plate-shaped ring portion and a slit groove that is continuously provided at equal angles on one surface of the ring portion and in which a leaf spring is detachably locked are formed. And a plurality of block-shaped locking portions, and a plurality of notches formed between the locking portions so that the claws can be protruded inwardly of the nail seats. The center part of the leaf spring is inserted and locked into the lit groove, and both ends of the leaf spring are elastically brought into contact with the outer peripheral surface of the nail fitted in the notch to urge the nail toward the inside of the nail seat. There is a feature in that.

According to a second aspect of the present invention, there is provided a cylindrical connecting portion connected to a fire hose, a receiving metal fitting provided with a cylindrical receiving port having a larger diameter than the connecting portion, and a receiving metal fitting. A cylindrical fastening ring that is detachably screwed into the receiving part of the ring, an annular claw seat fitted into the fastening ring, and an inward angled projection on the claw seat that protrudes inward. An insertion-type female metal fitting comprising a plurality of possible arc-shaped claws and a plurality of leaf springs interposed between the fastening ring and the claws to bias each claw toward the inside of the claw seat. The claw seat has a plurality of arc-shaped and block-shaped ring-shaped ring portions and slit grooves that are continuously provided at equal angles on one surface of the ring portions and that can be detachably locked to the leaf springs. And a plurality of notches that are formed between the locking portions so that the claw can be protruded inwardly of the claw seat. Parts inserted into and engaged thereby locked to, a particular feature was to energizing the both end portions resiliently abut against the cut-out portion fitted into the pawl outer peripheral surface of the claw of the plate spring inwardly in the clamp seat .

According to the first and second aspects of the present invention, the insertion-type female metal fitting includes a slit groove in which the central portion of the leaf spring is detachably inserted and locked at the locking portion of the claw seat, Both ends of the leaf spring are elastically brought into contact with the outer peripheral surface of the nail fitted in the notch portion of the nail seat, so that both ends of the leaf spring can be Without projecting outward, the leaf spring and the claws can be assembled to the claw seat, and then the claw seat can be assembled to the fastening ring, so that the assembly can be performed easily and quickly. Of course, the leaf springs need only be inserted into the slit grooves formed in the engaging portions of the claw seats, and the leaf springs can be assembled very easily.
Further, the insertion type female metal fitting according to claim 1 and claim 2 of the present invention elastically abuts both ends of the leaf spring to the outer peripheral surface of the claw fitted in the notch portion of the claw seat, Since the leaf spring is elastically deformed between the claw and the fastening ring, the thickness of the engaging portion of the claw seat can be increased, and the strength of the claw seat can be improved.
Further, in the plug-type female metal fitting according to claim 1 of the present invention, the receiving port of the metal fitting and the fastening ring are integrally formed, and the claw seat is detachably screwed to the inner peripheral surface of the fastening ring. Thus, the number of parts can be reduced, the assembly can be further simplified, and the cost can be reduced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a fitting using a plug-type female fitting 1 according to an embodiment of the present invention, which connects a fire hose H and a fire hydrant valve (not shown), Alternatively, it is used to connect fire hoses H and the like, and the insertion-type female fitting 1 connected to the end of the fire hose H, the discharge port of the fire hydrant valve, and the fire hose H It is comprised from the insertion-type male metal fitting 2 connected with an edge part and inserted in the female metal fitting 1 so that attachment or detachment is possible.

  As shown in FIG. 1, a female metal fitting 1 according to an embodiment of the present invention includes a cylindrical metal fitting 3 whose one end is connected to a fire hose H, and a cylinder integrally formed with the metal fitting 3. A ring-shaped fastening ring 3d, an annular claw seat 4 detachably screwed in the fastening ring 3d, a plurality of arc-shaped claws 5 arranged at equal angles on the claw seat 4, and a claw seat 4 It is composed of a plurality of leaf springs 6 that are locked to urge each claw 5 toward the inside of the claw seat 4. One end of the metal fitting 3 is inserted into the end of the fire hose H, The hose H is connected to the end of the fire hose H by winding and fixing a metal wire (not shown) such as mild steel around the outer peripheral surface of the hose H.

Specifically, as shown in FIG. 1, the metal fitting 3 is formed into a stepped cylindrical shape with a metal material such as an aluminum alloy, and a plurality of step portions are formed on the outer peripheral surface to form a fire hose H. The cylindrical connecting portion 3a is inserted into the end of the connecting portion 3a, and the cylindrical receiving portion 3b is connected to the connecting portion 3a and has a larger diameter and a larger thickness than the connecting portion 3a.
An annular packing storage groove 3c into which a synthetic rubber U-shaped packing 7 is fitted is formed on the inner peripheral surface at the back of the receiving port 3b.

  As shown in FIG. 1, the fastening ring 3 d is formed in a cylindrical shape from the same material as that of the bracket 3, and protrudes laterally (to the right in FIG. 1) on the outer peripheral surface of the receptacle 3 b of the bracket 3. It is connected in series. A female screw 3e to which a later-described claw seat 4 is detachably screwed is formed on the inner peripheral surface of the fastening ring 3d, and a synthetic rubber protective band (not shown) is formed on the outer peripheral surface of the fastening ring 3d. An annular shallow groove 3f into which (omitted) is fitted is formed.

As shown in FIGS. 1 to 3, the claw seat 4 is formed in an annular shape by a metal material such as an aluminum alloy, and is connected to the thick plate-shaped ring portion 4a and one surface of the ring portion 4a at equal angles. A plurality of locking portions 4c formed with slit grooves 4b that are provided and detachably inserted and locked to the leaf springs 6, and formed between the locking portions 4c, the claw 5 can protrude inward of the claw seat 4. And a plurality of notches 4d to be fitted in.
Further, each locking portion 4c of the claw seat 4 is formed in an arc-shaped block body having the same width as that of the ring portion 4a, and a leaf spring 6 is inserted and locked on the front surface of each locking portion 4c. The slit groove 4b to be formed is formed in a posture along the tangential direction of the ring portion 4a.
Furthermore, both end surfaces of each locking portion 4c are formed as inclined surfaces along the tangential direction of the ring portion 4a, and when the claw 5 disposed in the notch portion 4d moves inward of the claw seat 4. Locking to both ends of the claw 5 restricts the amount of protrusion of the claw 5 inward.
And the nail | claw seat 4 is each formed with the external thread 4e screwed together with the female thread 3e of the fastening ring 3d on the outer peripheral surface of the ring part 4a and each latching | locking part 4c, and the male screw 4e is attached to the fastening ring 3d. By screwing into the female screw 3e, it can be detachably mounted in the fastening ring 3d.

As shown in FIGS. 2 and 3, each of the claws 5 is formed in a circular arc shape by a metal material such as bronze, and is engaged with both end surfaces of the engaging portions 4 c of the claw seat 4 at both ends thereof. A stepped portion 5a that regulates the inward protrusion amount of the claw 5 is formed.
Moreover, the inner peripheral surface of each nail | claw 5 is formed in the inclined surface 5b so that it may function as a guide surface when the male metal fitting 2 is inserted.

  As shown in FIGS. 2 and 3, the leaf spring 6 is formed in a substantially mountain shape by a metal plate made of an elastic material, and its central portion is detachably inserted and locked in the slit groove 4 b of the claw seat 4. At the same time, both end portions thereof are elastically brought into contact with the outer peripheral surface of the claw 5 fitted in the notch portion 4d so as to press and urge the claw 5 toward the inside of the claw seat 4.

  When assembling the female metal fitting 1, first, the claws 5 are respectively fitted into the notches 4 d of the claw seat 4, and the leaf springs 6 are inserted into the slit grooves 4 b of the engaging portions 4 c of the claw seat 4. The center portions are inserted and locked, and both end portions of each leaf spring 6 are elastically brought into contact with the outer peripheral surface of the claw 5. Next, the claw seat 4 assembled with the claw 5 and the leaf spring 6 is opposed to the receiving fitting 3 so that the locking portion 4c faces the end face of the receiving opening 3b of the receiving fitting 3, and in this state the fastening ring 3d Screw into the female screw 3e. Finally, a retaining screw (not shown) is screwed into the fastening ring 3d so that the screwing of the fastening ring 3d and the claw seat 4 is not loosened.

The male metal fitting 2 coupled to the female metal fitting 1 is connected to the end of the fire hose H, and has the same structure as a conventionally known one.
That is, the male metal fitting 2 is integrally formed with the cylindrical connecting portion 8a connected to the end portion of the fire hose H and having a plurality of steps on the outer peripheral surface, and the outer peripheral surface of the distal end portion. A metal fitting 8 having a cylindrical insertion portion 8 c formed with an annular locking protrusion 8 b to be engaged with the claw 5 of the female fitting 1, and an axis line on the insertion portion 8 c of the insertion fitting 8. It is composed of a metal-made cylindrical push ring 9 that is slidably fitted in the direction so as to disengage the claw 5 of the female metal fitting 1 and the engaging protrusion 8b of the insertion metal fitting 8.

Thus, when the female fitting 1 and the male fitting 2 described above are coupled, the insertion portion 8 c of the fitting 8 of the male fitting 2 is inserted into the claw seat 4 of the female fitting 1. Then, the distal end of the insertion portion 8c of the insertion fitting 8 comes into contact with the claw 5 protruding inward of the claw seat 4, but since the inner surface of the claw 5 is an inclined surface 5b, the claw 5 is pressed by the pressing force of the insertion fitting 8. 5 is pushed outward against the elastic force of the leaf spring 6. Thereby, the front-end | tip part of the insertion metal fitting 8 is inserted in the nail | claw seat 4 sequentially.
When the locking protrusion 8b of the insertion portion 8c of the insertion fitting 8 is inserted to a position beyond the claw 5, the claw 5 protrudes inward of the claw seat 4 by the elastic force of the leaf spring 6, and the engagement projection of the insertion fitting 8 It will be locked to the back side of the strip 8b, and the female metal fitting 1 and the male metal fitting 2 are joined in a state of being prevented from coming off.
On the other hand, when the coupling between the female metal fitting 1 and the male metal fitting 2 is released, the push ring 9 of the insertion fitting 8 is moved to the distal end side of the insertion portion 8c. Then, the tip of the push ring 9 pushes the inclined surface 5 b of the claw 5, and the claw 5 pushes outward beyond the outer diameter of the locking protrusion 8 b of the insertion fitting 8 against the elastic force of the leaf spring 6. Then, the locking projection 8b and the claw 5 are unlocked. Thereby, the male metal fitting 2 can be pulled out from the female metal fitting 1.

In the female metal fitting 1, a slit groove 4 b in which the central portion of the leaf spring 6 is detachably inserted and locked is formed in the locking portion 4 c of the claw seat 4, and both ends of the leaf spring 6 are notched in the claw seat 4. Since the outer periphery of the claw 5 fitted into the portion 4d is elastically brought into contact with the outer periphery of the claw 5, the claw 5 is moved inwardly of the claw seat 4 even if both end portions of the leaf spring 6 do not contact the fastening ring 3d. Further, both end portions of the leaf spring 6 do not protrude outward from the claw seat 4. As a result, the female metal fitting 1 can be assembled easily and quickly because the claw seat 4 can be assembled to the fastening ring 3d after the leaf spring 6 and the claw 5 are assembled to the claw seat 4. Of course, the leaf spring 6 only needs to be inserted and locked in the slit groove 4b of the locking portion 4c of the claw seat 4, and the leaf spring 6 can be assembled very easily.
Further, the female metal fitting 1 has both end portions of the plate spring 6 elastically contacted with the outer peripheral surface of the claw 5 fitted into the notch portion 4d of the claw seat 4, and the plate spring 6 is connected to the claw 5 and the fastening ring 3d. Therefore, the thickness of the locking portion 4c of the nail seat 4 can be increased, and the strength of the nail seat 4 can be improved.
Further, the female metal fitting 1 integrally forms the receiving port 3b and the fastening ring 3d of the receiving fitting 3, and attaches and detaches the claw seat 4 in which the claw 5 and the leaf spring 6 are assembled to the inner peripheral surface of the fastening ring 3d. Since it is configured to be freely screwed, it is possible to reduce the number of parts, further simplify assembly, and reduce costs.

FIG. 4 shows an insertion-type female metal fitting 1 according to another embodiment of the present invention. The female metal fitting 1 has an annular flange portion 4f on the outer peripheral surface of the ring portion 4a of the claw seat 4. The flange portion 4f is in contact with the end face of the fastening ring 3d when the claw seat 4 is screwed into the fastening ring 3d, and an annular protrusion formed at one end of the outer peripheral surface of the fastening ring 3d. An annular shallow groove 3f into which a protective band (not shown) is fitted is formed on the outer peripheral surface of the fastening ring 3d by the strip and the flange portion 4f of the claw seat 4.
The female metal fitting 1 is configured in the same structure as the female metal fitting 1 shown in FIG. 1 except that the flange portion 4f is integrally formed on the claw seat 4, and the female metal fitting 1 shown in FIG. The same members / parts are denoted by the same reference numerals, and detailed description thereof is omitted.
This female metal fitting 1 can also exhibit the same effects as the female metal fitting 1 shown in FIG.

  In each of the plug-type female metal fittings 1 (shown in FIGS. 1 and 4) according to the above-described embodiments, the receiving opening 3b and the fastening ring 3d of the metal fitting 3 are integrally formed. In addition, a female screw 3e is formed on the inner peripheral surface of the fastening ring 3d, and a male screw 4e is formed on the outer peripheral surface of the claw seat 4 to be screwed with the female screw 3e of the fastening ring 3d. In the embodiment, like the conventional female metal fitting shown in FIG. 5, the receiving opening 3b and the fastening ring 3d of the receiving fitting 3 are formed separately, and the claw seat 4 and the claw 5 are formed in the fastening ring 3d. And the plate spring 6 may be assembled, and then the fastening ring 3d may be screwed into the receiving port 3b of the metal fitting 3. In this case, it is a matter of course that a male screw is formed on the outer peripheral surface of the receiving port 3b of the metal fitting 3 and a female screw that is screwed to the male screw of the receiving port 3b is formed on the inner peripheral surface of the fastening ring 3d. Further, it is not necessary to form a male screw on the outer peripheral surface of the nail seat 4.

It is a longitudinal cross-sectional view of the coupling metal fitting using the insertion type female metal fitting which concerns on embodiment of this invention. It is the sectional view on the AA line of FIG. It is a top view of the state which showed the nail | claw seat of the female metal fitting, the nail | claw, and the leaf | plate spring, and disassembled some components. It is a longitudinal cross-sectional view of the insertion type female metal fitting which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view of the conventional insertion type female metal fitting. FIG. 6 is a sectional view taken along line B-B in FIG. 5. It is a top view of the state which showed the nail | claw seat of the conventional female metal fitting, the nail | claw, and the leaf | plate spring, and decomposed | disassembled some components.

Explanation of symbols

  1 is a female fitting, 3 is a receiving fitting, 3a is a connecting portion, 3b is a receiving port, 3d is a fastening ring, 3e is a female screw, 4 is a claw seat, 4a is a ring portion, 4b is a slit groove, and 4c is a latch 4d is a notch, 4e is a male screw, 5 is a claw, 6 is a leaf spring, and H is a hose.

Claims (2)

A cylindrical coupling part (3a) coupled to the fire hose (H) and a receiving bracket (3b) connected to the cylindrical coupling part (3a) and having a cylindrical receptacle part (3b) larger in diameter than the coupling part (3a) ), A cylindrical fastening ring (3d) formed integrally with the receiving opening (3b) of the receiving metal fitting (3), and an annular claw seat ( removably screwed into the fastening ring (3d)). 4), a plurality of arcuate claws (5) disposed at equal angles on the nail seat (4) and projecting inward of the nail seat (4), and latched on the nail seat (4) In the insert-type female metal fitting (1) composed of a plurality of leaf springs (6) for urging each claw (5) inward of the claw seat (4), the claw seat (4) An arc shape in which a plate-like ring portion (4a) and a slit groove (4b) which is continuously provided at equal angles on one side of the ring portion (4a) and in which the leaf spring (6) is detachably locked are formed. And block-like plural The engaging portion (4c) and a plurality of notches (4d) formed between the engaging portions (4c) and into which the claw (5) can be protruded inwardly of the claw seat (4) The outer periphery of the claw (5) in which the center portion of the leaf spring (6) is inserted and locked in the slit groove (4b) of the claw seat (4), and both ends of the leaf spring (6) are fitted into the notches (4d) An insertion-type female metal fitting characterized in that the nail (5) is urged inward of the nail seat (4) by elastically contacting the surface. A cylindrical coupling part (3a) coupled to the fire hose (H) and a receiving bracket (3b) connected to the cylindrical coupling part (3a) and having a cylindrical receptacle part (3b) larger in diameter than the coupling part (3a) ), A cylindrical fastening ring (3d) that is detachably screwed into the receiving port (3b) of the receiving metal fitting (3), and an annular claw seat (4) fitted in the fastening ring (3d) A plurality of arcuate claws (5) disposed at equal angles on the claw seat (4) and projecting inward of the claw seat (4), a fastening ring (3d) and a claw (5) In the plug-type female metal fitting (1) comprising a plurality of leaf springs (6) interposed between the plurality of leaf springs (6) for urging each claw (5) inward of the claw seat (4), The claw seat (4) is connected to the plate-shaped ring portion (4a) and one surface of the ring portion (4a) at equal angles, and the slit groove (4b) to which the leaf spring (6) is detachably locked. ) Formed in a circular arc shape and bromine A plurality of hook-shaped locking portions (4c) and a plurality of notches (4d) formed between the locking portions (4c) and into which the claw (5) is fitted so as to protrude inward of the nail seat (4) The nail | claw which inserted and latched the center part of the leaf | plate spring (6) in the slit groove | channel (4b) of the said nail | claw seat (4), and was fitted by the notch part (4d) at both ends of the leaf | plate spring (6) An insertion-type female metal fitting characterized in that the claw (5) is urged inward of the claw seat (4) by elastically contacting the outer peripheral surface of (5) .

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