JP3038232U - Fire fitting fittings - Google Patents

Abstract

(57) [PROBLEMS] To provide a male fitting for a fire fighting joint capable of engaging with female fittings having different sizes. SOLUTION: A base end 1a is attached to a water outlet A, and an outer cylindrical body 1 having an outer annular projection 12 for locking a large-diameter female metal fitting E is provided on an outer peripheral surface 8 of a distal end 1b. A first sliding tube 3 for unlocking the large-diameter female metal fitting E fitted movably, an inner cylinder 2 slidably inserted in the outer cylinder 1, and a tip 2b of the inner cylinder 2. And an annular member 5 for locking the small-diameter female metal fitting provided on the outer peripheral surface 7. Further, a second sliding pipe 4 for unlocking the small-diameter female metal fitting which is slidably fitted on the inner cylindrical body 2 is provided, and the second sliding tube 4 is elastically urged toward the outer cylindrical body 1 side. An elastic member 6 is provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a male fitting for a fire fighting joint.

[0002]

[Prior art]

 Conventionally, male fittings for fire fighting fittings that are attached to spouts such as pumps and fire hydrants of fire trucks have locking tabs for female fittings (which are attached to the base end of the fire hose) at the tip of the tubular fitting body. It had an annular protrusion with a predetermined outer diameter for stopping, and a sliding pipe for unlocking the female fitting that was fitted onto the joint body.

[0003]

[Problems to be solved by the device]

 However, this male fitting was able to engage only with the female fitting commensurate with its diameter. In other words, only the female metal fitting having the diameter corresponding to the predetermined outer diameter of the annular projection can be connected to the male metal fitting. For this reason, for example, if the male fitting attached to the water outlet of the fire hydrant does not match the diameter of the female metal fitting of the fire hose that was brought to the fire extinguishing site, the fire hose could not be connected to the fire hydrant and water was sprayed. There was a problem that fire fighting activities could not be performed.

Therefore, an object of the present invention is to provide a male fitting of a fire fighting joint that can be engaged with female fittings of different sizes.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a male fitting of a fire fighting fitting according to the present invention has a base end attached to a water outlet and an inner annular projection on an inner and outer peripheral surface of a tip and an outer fitting for locking a large diameter female fitting. An outer cylindrical body having an annular protruding portion, and a first sliding member for unlocking a large-diameter female metal fitting that is slidably fitted on the outer cylindrical body and is attached so as to come into contact with the outer annular protruding portion. A pipe, an inner cylindrical body slidably inserted into the outer cylindrical body and having a sliding contact portion that slidably contacts the inner peripheral surface of the outer cylindrical body, and an outer peripheral surface of a tip of the inner cylindrical body. An annular member for locking a small-diameter female metal fitting, and a second sliding tube for unlocking a small-diameter female metal fitting, which is slidably fitted onto the inner cylindrical body and abuts against the annular member. And an elastic member for elastically urging the outer flange portion provided at the base end of the second sliding tube toward the outer cylindrical body.

Further, a joint body having a large tubular portion from the base end to the middle and a small tubular portion from the middle to the tip and having an outer annular protrusion for locking a large-diameter female fitting on the outer peripheral surface of the large tubular portion, , A first sliding tube for slidably externally fitting to the large tubular portion and attached to the outer annular projection for unlocking a large-diameter female metal fitting, and an outer periphery of the tip of the small tubular portion. An annular member for locking the small-diameter female metal fitting provided on the surface, and further, for unlocking the small-diameter female metal fitting that is slidably fitted on the small tubular portion and can abut the annular member. In addition to providing the second sliding tube, an elastic member for elastically urging the outer collar portion provided at the base end of the second sliding tube toward the large cylinder portion is provided.

Further, the outer diameter of the outer annular protrusion of the outer cylinder is made equal to the outer diameter of the outer flange of the second sliding tube so that the outer peripheral surface of the outer annular protrusion and the outer circumference of the outer flange are equal. The surface and the surface are the same as each other. In addition, the outer diameter of the outer annular projection of the large tubular portion and the outer diameter of the outer flange of the second sliding tube are made equal to each other so that the outer peripheral surface of the outer annular projection and the outer peripheral surface of the outer flange are mutually connected. It has the same surface.

Further, the outer diameter of the outer flange portion of the second sliding tube is made smaller than the outer diameter of the outer annular protrusion of the outer tubular body, and an annular groove is formed on the outer end surface of the outer annular protrusion. It is formed so that the outer flange portion is fitted in the groove. Further, the outer diameter of the outer collar portion of the second sliding tube is made smaller than the outer diameter of the outer annular protrusion of the large tubular portion, and an annular groove is formed on the outer end surface of the outer annular protrusion. The outer flange portion is fitted in the groove.

Further, the sliding contact portion has a resistance adding member that makes sliding contact with the inner peripheral surface of the outer cylindrical body, and the frictional resistance force of the resistance adding member is made larger than the elastic force of the elastic member. .

[0010]

[Embodiment of the invention]

 Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments.

FIG. 1 shows an embodiment of a male fitting of a fire fighting fitting according to the present invention. The male fitting includes an outer tubular body 1 and a first externally slidably fitted external tubular body 1. The sliding tube 3, the inner cylindrical body 2 slidably inserted in the outer cylindrical body 1, the second sliding tube 4 slidably fitted in the inner cylindrical body 2, and the inner cylindrical body 2 An annular member 5 provided on the outer peripheral surface 7 of the tip 2b and an elastic member 6 for elastically urging the second sliding tube 4 toward the outer cylinder 1 are provided, and are engaged with female metal fittings of different sizes. It can be combined.

More specifically, the outer cylindrical body 1 is provided with a male screw portion 9 on an outer peripheral surface 8 of a base end 1a thereof for screwing and coupling to a female screw portion of a discharge port such as a pump or a fire hydrant of a fire engine. In addition, an inner annular protrusion 11 and an outer annular protrusion 12 are provided on the inner and outer peripheral surfaces 10 and 8 of the tip 1b. Incidentally, a female screw portion may be formed on the inner peripheral surface 10 of the base end 1a of the outer cylindrical body 1 so as to correspond to the spout having the male screw portion.

The first sliding tube 3 fitted on the peripheral wall 15 of the outer tubular body 1 has an outer flange portion 14 at its base end 3 a, and a tip on the outer peripheral surface 8 of the outer tubular body 1. By sliding to the side, the tip edge portion 16 thereof comes into contact with the outer annular projection portion 12. The outer peripheral surface 13 of the first sliding tube 3 is in the same plane as the outer peripheral surface 17 of the outer annular projection 12 or at a position outside thereof.

The inner cylindrical body 2 has a sliding contact portion 19 which is in sliding contact with the inner peripheral surface 10 of the outer cylindrical body 1 on the outer peripheral surface 7 of the base end 2 a, and the male screw 21 is provided on the outer peripheral surface 7 of the tip 2 b. Has been formed. The sliding contact portion 19 includes an annular wall portion 23 projecting outward from the peripheral wall 18 of the inner cylindrical body 2 and a ring-shaped resistance adding member 20 fitted in a groove 22 on the outer peripheral surface of the annular wall portion 23. And the resistance adding member 20 is in contact with the inner peripheral surface 10 of the outer cylindrical body 1. The resistance adding member 20 will be described in detail later.

The peripheral wall 18 of the inner tubular body 2 is slidably inserted (from the opening side of the base end 1 a of the outer tubular body 1) into the hole of the inner annular protrusion 11 of the outer tubular body 1. There is. Then, the sliding contact portion 19 of the inner tubular body 2 and the inner annular projection 11 of the outer tubular body 1 are engaged with each other and are prevented from being pulled out from each other.

The second sliding tube 4 is provided with a small tube portion 24 a having an inner diameter dimension substantially equal to the outer diameter dimension of the inner cylindrical body 2 peripheral wall 18, and a peripheral wall of the inner cylindrical body 2 provided at the tip of the small tube portion 24 a. It has a large pipe portion 24b forming a gap M between it and the outer pipe portion 25 and an outer collar portion 25 provided at the base end of the small pipe portion 24a. It is fitted from the 2b side. The outer diameter of the outer collar portion 25 is set equal to the outer diameter of the outer annular protrusion 12 of the outer cylindrical body 1, and the outer peripheral surface 25a of the outer collar 25 and the outer peripheral surface 17 of the outer annular protrusion 12 are connected to each other. Are flush with each other.

The annular member 5 attached to the tip 2b of the inner cylinder 2 has a stepped portion 5a on the outer peripheral surface, and a female screw 26 that is screwed onto the male screw 21 of the tip 2b of the inner cylinder 2 on the inner peripheral surface. Has been formed.

Further, a resilient member 6 such as a coil spring is inserted in the inner cylindrical body 2 and provided between the annular member 5 and the second sliding tube 4, and the second sliding tube 4 is fitted to the outer cylinder. Repulsive force toward body 1. Specifically, between the base end surface of the annular member 5 and the front end surface of the second sliding tube 4 small tube portion 24a, and the base end side of the elastic member 6 is housed in the gap M. The elastic member 6 presses the proximal end surface 27 of the outer flange 25 of the second sliding tube 4 into contact with the distal end surface 28 of the outer tubular body 1.

Therefore, the resistance adding member 20 of the sliding contact portion 19 of the inner cylindrical body 2 is made of a material having a large frictional resistance such as rubber, and the resistance adding member 20 is attached to the inner peripheral surface 10 of the inner cylindrical body 2. The frictional resistance is made larger than the elastic urging force of the elastic member 6. Therefore, as shown in FIG. 2, when not in use, the inner cylinder 2 is slid toward the base end 1a side of the outer cylinder 1 to bring the entire shortened state. Since a large frictional resistance is generated in the inner cylinder body 2, the inner cylinder body 2 is not returned by the elastic member 6 and the entire shortened state can be maintained. The overall length is minimized when the tip of the large tube portion 24b of the second sliding tube 4 contacts the stepped portion 5a of the annular member 5.

Next, FIG. 3 shows a connected state of the male fitting and the large-diameter female fitting E of the fire fighting fitting of the present invention. Here, the large-diameter female metal fitting E will be briefly described. The female metal fitting E includes a hose mounting cylinder portion 42 and a connecting portion 43 having an annular elastic body 44 on the outer peripheral surface. The peripheral wall 43a has the locking claws 41, which are elastically urged toward the axial center by springs 45, and a seal member 46 provided near the locking claws 41.

Explaining the mounting order, first, the male screw portion 9 of the base end 1 a of the outer tubular body 1 is screwed to the female screw portion of the spout A and mounted. Then, the male fitting is inserted into the opening of the large-diameter female fitting E attached to the base end 40a of the fire hose 40. Then, the locking claws 41 ... Protrudingly provided from the surrounding wall 43a of the large-diameter female fitting E are locked to the outer annular projection 12 (for locking the large-diameter female fitting E) of the outer cylinder body 1, The female metal fitting E and the male metal fitting are connected to each other.

At this time, between the stepped portion 47 provided on the inner surface side of the peripheral wall 43 a and the locking claw 41, the outer annular projection 12 of the outer cylindrical body 1 and the outer collar portion of the second sliding tube 4 are provided. 25 mate. The sealing member 46 of the female metal fitting E is in close contact with the outer peripheral projections 17 and 25a of the outer collar portion 25 and prevents water leakage.

In order to connect the male fitting (of the present invention) to the large-diameter female fitting E, the width W ₀ of the outer annular projection 12 and the thickness T ₀ of the outer collar 25 are total dimensions W _1, together with is set substantially equal to the predetermined distance dimension from the stepped portion 47 of the large径雌bracket E until the locking claw 41, outside of the outer annular projection 12 and the outer flange portion 25 of the The diameter dimension D ₁ is set to be substantially equal to the inner diameter dimension of the peripheral wall 43a of the connecting portion 43 of the female metal fitting E. Further, the male fitting is configured such that the maximum outer diameter of the second sliding tube 4 on the tip side of the outer collar portion 25 is smaller than the inner diameter D ₂ of the hose mounting tubular portion 42 of the female fitting E. ing.

Further, (as described above), the outer peripheral surface 17 of the outer annular projection portion 12 and the outer peripheral surface 25a of the outer collar portion 25 are flush with each other, and the outer collar portion 25 is formed in the same shape. By being elastically urged to the side, when the female fitting E and the male fitting are disengaged, the locking claw 41 can slide smoothly on both outer peripheral surfaces 17 and 25a (without being caught). it can.

To remove the female fitting E in the locked state from the male fitting, as shown in FIGS. 3 and 4A, the tip of the first sliding pipe 3 (for releasing the locking of the large diameter female fitting E) The rim 29 is inserted into the gap between the outer cylinder 1 and the female fitting E, and is pressed until it comes into contact with the outer annular projection 12. Then, the locking claw 41 of the female fitting E is retracted into the peripheral wall 43a by the leading edge 29, and the locked state is released. Then, as shown in FIG. 4B, when the female metal fitting E is pulled (in the direction of arrow C), the locking claw 41 slides on the outer peripheral surface 17, 25a of the outer annular projection 12 and the outer collar 25. The female metal fitting E is disengaged from the male metal fitting.

Next, FIG. 5 shows a connected state of the male fitting and the small-diameter female fitting S. By inserting the male fitting into the opening of the small-diameter female fitting S, the female fitting S is attached to the stepped portion 5a of the annular member 5 (for locking the small-diameter female fitting S) provided at the tip 2b of the inner cylinder 2. While the locking claws 41 ... Are locked, the annular member 5 is fitted between the locking claw 41 of the female metal fitting S and the stepped portion 47, and the male metal fitting and the small diameter female metal fitting S are connected to each other. Further, the sealing member 46 of the female metal fitting S adheres to the outer peripheral surface of the annular member 5 to prevent water leakage.

In other words, the male fitting (of the present invention) has a width W ₂ from the tip surface 30 of the annular member 5 to the stepped portion 5 a in order to be connectable to the small-diameter female fitting S. It is set to be approximately equal to the predetermined distance from the stepped portion 47 of S to the locking claw 41, and the outer diameter dimension D ₃ of the annular member 5 is the inner diameter dimension of the peripheral wall 43a of the connecting portion 43 of the female metal fitting S. Are set almost equal to.

Then, in order to remove the female fitting S in the locked state from the male fitting, as shown in FIGS. 5 and 6A, the second sliding pipe (for unlocking the small diameter female fitting S) The tip edge 39 of 4 is inserted into the gap between the annular member 5 and the female fitting S, and is pressed until it comes into contact with the stepped portion 5a of the annular member 5. Then, the locking claw 41 of the female fitting S is retracted into the peripheral wall 43a by the leading edge 39, and the locked state is released. Then, as shown in FIG. 6B, when the female metal fitting S is pulled (in the direction of arrow C), the locking claw 41 moves on the outer peripheral surface of the annular member 5, and the female metal fitting S is removed from the male metal fitting. It When the second sliding tube 4 is released, the elastic member 6 causes the second sliding tube 4 to return to the outer cylinder 1 side (as indicated by the phantom line).

Next, FIG. 7 shows another embodiment of the male fitting of the fire fighting fitting of the present invention. This male fitting has a large cylindrical portion 32a from the base end 31a to the middle 31b and an intermediate 31b to the tip 31c. The joint main body 32 having a small tubular portion 32b extending to the front, the first sliding tube 3 for slidably fitting the large tubular portion 32a for unlocking the large-diameter female fitting, and the small tubular portion 32b. An annular member 5 for locking a small-diameter female metal fitting provided on the outer peripheral surface 34 of the tip 31c, and a second sliding tube 4 for unlocking the small-diameter female metal fitting slidably fitted on the small tubular portion 32b. And an elastic member 6 for elastically urging the outer collar portion 25 provided at the base end of the second sliding tube 4 toward the large cylinder portion 32a.

More specifically, the joint body 32 is a combination of the outer cylinder body 1 and the inner cylinder body 2 described in FIG. 1, and is attached to the discharge port on the outer peripheral surface 33 of the base end 31 a thereof. And an outer annular projection 12 for locking a large-diameter female metal fitting on the outer peripheral surface 33 of the middle 31b, and a female screw 26 of the annular member 5 on the outer peripheral surface 34 of the tip 31c. It has a male screw 21 to be screwed.

The second sliding tube 4 includes a pipe body 36 that is spaced from the outer peripheral surface 34 of the small tube portion 32 b of the joint body 32 and forms a gap M, and an outer pipe provided at the proximal end of the pipe body 36. It is composed of a collar portion 25 and an inner collar portion 37, and the inner peripheral surface of the inner collar portion 37 is slidable on the small tubular portion 32b. Further, the elastic member 6 is inserted by the small tubular portion 32b and is provided between the base end surface of the annular member 5 and the inner flange portion 37 of the second sliding tube 4, and the elastic member 6 is provided in the gap M. A part of is stored.

Further, (similarly to the description with reference to FIGS. 1 and 3), the outer diameter dimension of the outer annular protrusion 12 of the large tubular portion 32a and the outer diameter dimension of the outer collar portion 25 of the second sliding tube 4 are made equal. Then, the outer peripheral surface 17 of the outer annular protrusion 12 and the outer peripheral surface 25a of the outer collar 25 are made flush with each other, and the width dimension of the outer annular protrusion 12 and the thickness dimension of the outer collar 25 are The total dimension W _{1 is} for the large diameter female fitting E.

Next, FIG. 8 shows another embodiment, which is an outer diameter dimension of the outer flange portion 25 of the second sliding tube 4 fitted on the small tubular portion 32b of the joint body 32. Is smaller than the outer diameter of the outer annular projection 12 of the large tubular portion 32a of the joint main body 32, and an annular groove 48 is formed on the outer (front end) end surface of the outer annular projection 12. The outer brim portion 25 is fitted in the groove 48.

This eliminates the boundary between the outer annular projection 12 and the outer collar 25 on the outer peripheral surface side, so that when the large-diameter female fitting E is engaged with and disengaged from the male fitting, the outer annular projection of the locking claw 41 is removed. 12 The movement (sliding) to the outer peripheral surface 17 becomes smoother. In this case, it is preferable that the outer peripheral surface of the second sliding tube 4 is provided with the ridge portion 38 for finger hanging.

Further, also in the case of the male fitting described in FIG. 1, the outer diameter dimension of the outer collar portion 25 of the second sliding tube 4 is made smaller than the outer diameter dimension of the outer annular protrusion 12 of the outer tubular body 1. At the same time, it is also preferable to form an annular recessed groove 48 on the outer (front end side) end surface of the outer annular protrusion 12 so that the outer flange 25 is fitted into the recessed groove 48.

[0036]

[Effect of the invention]

 Since the present invention is configured as described above, the following effects can be obtained.

It is possible (according to claim 1 or 2) to engage with female fittings of different sizes. Therefore, if a male metal fitting (of the present invention) is attached to the water outlet of a fire hydrant or the like at the fire site, whichever diameter (large or small diameter) the female metal fitting of the fire hose brought to the fire scene can be installed. By connecting the female metal fitting to the male metal fitting and connecting the fire hose to the water outlet such as a fire hydrant, the fire can be extinguished by spraying water. In other words, it is possible to quickly discharge water without making a mistake in selecting the fire hose that matches the male fitting.

When not in use (according to claim 1), the inner cylindrical body 2 can be pushed into the outer cylindrical body 1 to shorten the whole compactly for storage and storage. The number of parts is small (according to claim 2) and the assembly is easy.

Since no step is formed at the boundary between the outer annular projection 12 and the outer collar 25 (according to claim 3 or 4), when the large-diameter female metal fitting E is locked or unlocked with the male metal fitting. The locking claws 41 of the female fitting E can slide smoothly without being caught on the outer peripheral surface 17, 25a of the outer annular projection 12 and the outer collar 25. That is, the large-diameter female metal fitting E can be smoothly attached to and removed from the male metal fitting.

Since no boundary between the outer annular protrusion 12 and the outer collar 25 is formed on the outer peripheral surface 17 of the outer annular protrusion 12 (according to claim 5 or 6), the large-diameter female metal fitting E is attached to the male metal fitting. When locking or unlocking the female metal fitting E, the locking claws 41 of the female metal fitting E slide more smoothly on the outer peripheral surface 17 of the outer annular projection 12 to attach the large diameter female metal fitting E to the male metal fitting. Removal can be done more smoothly.

(According to the seventh aspect) With the resistance adding member 20, the inner cylindrical body 2 can be pushed into the outer cylindrical body 1 to maintain a compact and shortened state.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of an essential part showing a shortened state.

FIG. 3 is a sectional front view showing a connected state with a large-diameter female fitting.

FIG. 4 is an operation explanatory view showing a connection release state with a large-diameter female fitting.

FIG. 5 is a sectional front view showing a connected state with a small-diameter female fitting.

FIG. 6 is an operation explanatory view showing a connection release state with a small-diameter female fitting.

FIG. 7 is a cross-sectional view of a main part showing another embodiment.

FIG. 8 is a main-portion cross-sectional view showing another embodiment.

[Explanation of symbols]

 1 Outer Cylinder 1a Base End 1b Tip 2 Inner Cylinder 2b Tip 3 First Sliding Tube 4 Second Sliding Tube 5 Annular Member 6 Repulsive Member 7 Outer Surface 8 Outer Surface 10 Inner Surface 11 Inner Annular Protrusion 12 Outer annular protrusion 17 Outer peripheral surface 19 Sliding contact 20 Resistance addition member 25 Outer collar 25a Outer peripheral surface 31a Base end 31b Intermediate 31c Tip 32 Joint body 32a Large tube 32b Small tube 33 Outer peripheral surface 34 Outer surface 48 Circular groove A Water spout E Large-diameter female metal fitting S Small-diameter female metal fitting

Claims (7)

[Utility model registration claims] 1. An outer cylinder having a base end 1a attached to a water outlet A and having an inner annular projection 11 and an outer annular projection 12 for locking a large-diameter female fitting E on inner and outer peripheral surfaces 10, 8 of a tip 1b. A body 1 and a large-diameter female metal fitting E which is slidably fitted on the outer cylinder body 1 and is attached so as to be able to abut on the outer annular projection 12 for unlocking.
The sliding tube 3, the inner cylindrical body 2 slidably inserted into the outer cylindrical body 1 and having a sliding contact portion 19 in sliding contact with the inner peripheral surface 10 of the outer cylindrical body 1, and the inner cylindrical body 2 An annular member 5 for locking the small-diameter female metal fitting S provided on the outer peripheral surface 7 of the distal end 2b of the front end 2b, and further slidably fitted on the inner cylindrical body 2 and abutting on the annular member 5. Second sliding tube 4 for unlocking possible small diameter female metal fitting S
And a resilient member 6 that resiliently urges the outer collar portion 25 provided at the base end of the second sliding tube 4 toward the outer cylinder body 1 side. Male fittings. 2. A large cylindrical portion from the base end 31a to the middle 31b
32a and a joint body 32 having a small tubular portion 32b from the middle 31b to the tip 31c and an outer annular projection 12 for locking a large diameter female metal fitting E on the outer peripheral surface 33 of the large tubular portion 32a;
a first sliding tube 3 for unlocking the large-diameter female metal fitting E, which is slidably fitted over a and is attached so as to be able to abut on the outer annular projection 12, and a tip 31c of the small tubular portion 32b. An annular member 5 for locking a small-diameter female metal fitting S provided on the outer peripheral surface 34 of the small-diameter member, and a small-diameter member slidably fitted on the small-cylindrical portion 32b and abutting on the annular member 5. A second sliding tube 4 for unlocking the female fitting S is provided, and an elastic member that elastically urges the outer collar portion 25 provided at the base end of the second sliding tube 4 toward the large cylinder portion 32a side. Male fittings for fire fighting, characterized by having 6. 3. The outer diameter of the outer annular projection 12 of the outer cylindrical body 1 and the outer diameter of the outer collar 25 of the second sliding tube 4 are made equal to each other and the outer circumferential surface 17 of the outer annular projection 12 is formed. The male fitting for a fire fighting joint according to claim 1, wherein the outer peripheral surface (25a) of the outer collar portion (25) is flush with each other. 4. The outer diameter of the outer annular projection 12 of the large cylindrical portion 32a and the outer diameter of the outer collar 25 of the second sliding tube 4 are made equal to each other and the outer peripheral surface 17 of the outer annular projection 12 and The male fitting for a fire fighting joint according to claim 2, wherein the outer peripheral surface 25a of the collar portion 25 is flush with each other. 5. The outer diameter dimension of the outer collar portion 25 of the second sliding tube 4 is made smaller than the outer diameter dimension of the outer annular protrusion portion 12 of the outer cylindrical body 1, and the outer end surface of the outer annular protrusion portion 12 is provided. The male fitting for a fire fighting joint according to claim 1, wherein an annular groove (48) is formed so that the outer collar portion (25) is fitted into the groove (48). 6. The outer diameter of the outer collar portion 25 of the second sliding tube 4 is made smaller than the outer diameter of the outer annular protrusion 12 of the large cylindrical portion 32a, and the outer end surface of the outer annular protrusion 12 is circular. The male fitting for a fire fighting joint according to claim 2, wherein an annular groove 48 is formed so that the outer collar portion 25 is fitted into the groove 48. 7. The sliding contact portion 19 has a resistance adding member 20 in sliding contact with the inner peripheral surface 10 of the outer cylindrical body 1, and the frictional resistance force of the resistance adding member 20 is greater than the elastic force of the elastic member 6. The male fitting of the fire fighting joint according to claim 1, 3 or 5, which is enlarged.