JP7103650B2 - Underground fire hydrant and mediator used for it - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law Fukuoka Waterworks Exhibition October 24-26, 2018 http: // www. kyouwakk. com / http: // www. kyouwakk. com / entry10. html November 5, 2018

The present invention relates to an underground fire hydrant installed underground and a specific mediator used therein.

Underground fire hydrants are installed underground and are generally located between tap water inlets, where tap water is introduced, fire extinguishing floodways with a male mouthpiece at the tip, and between those tap water inlets and fire extinguishing floodways. It is equipped with an on-off valve that opens and closes. The male base is generally a metal plug-in type (so-called Machino type). The male base of an underground fire hydrant has a base body and a push ring as an unlocking mechanism. The base body has a large-diameter cylindrical portion and a small-diameter tubular portion. The large-diameter tubular portion is provided at the upper end of the male base, and the small-diameter tubular portion is provided below the large-diameter tubular portion so as to form a step with the large-diameter tubular portion. The push ring is movable and rotatable in the vertical direction on the outside of the small-diameter tubular portion of the base body, and is generally provided on the tubular base and its lower portion so as to be symmetrically outward. It has a structure having a flange portion having two protruding portions and a flange portion having two protruding portions.

Underground fire hydrants are generally connected to a fire hose via a stand pipe. The stand pipe is a long metal pipe used in an upright position, with a female mouthpiece similar to that of a fire hose at the lower end, and an underground fire hydrant at the upper end. It has a male mouthpiece similar to that of the one. The female base of the stand pipe has a claw portion that is urged inward by a spring. When preparing for fire extinguishing, the stand pipe can be easily connected to the underground fire hydrant simply by inserting the female base into the male base of the underground fire hydrant and locking it. The upper end of this connected stand pipe is exposed to the ground, and the female base of the fire hose is applied to the male base and inserted and locked to connect the fire hose. It is said.

When the fire extinguishing is completed, the stand pipe is unlocked by pulling the push ring of the male mouthpiece toward the fire hose side, and the fire extinguishing hose is removed. Then, the stand pipe can be removed from the underground fire hydrant by pulling up the push ring of the male base of the underground fire hydrant to release the lock.

As described above, the underground fire hydrant can be easily and quickly connected to the fire hose when preparing for extinguishing the fire by using the stand pipe. However, when the fire extinguishing is completed and the stand pipe is removed from the underground fire hydrant, usually, the push ring of the male base of the underground fire hydrant is pulled up by reaching out in the appearance of kneeling and bending over or crawling. Therefore, the work after the fire extinguishing is completed becomes complicated.

Conventionally, various techniques have been proposed so as to facilitate the fire extinguishing preparation work or the work after the fire extinguishing is completed in the underground fire hydrant. For example, Patent Document 1 discloses an underground fire hydrant in which a base portion for connecting a fire hose is formed into a stretchable nested tubular shape. This underground fire hydrant does not require a stand pipe, and the fire hose can be connected on the ground simply by pulling up the base. Further, in Patent Document 2, a communication pipe is provided in a valve box (fire hydrant main body), and a stretchable nested tubular communication pipe rotatably connected around a horizontal axis is provided in the communication pipe. An underground fire hydrant provided with a connection pipe (mouthpiece) for connecting a fire hose to the tip is disclosed. This underground fire hydrant does not require a stand pipe, and the fire hose can be connected on the ground (or on the snow surface) by rotating the connecting pipe and pulling up the connecting pipe (base).

Further, Patent Document 3 discloses a stand pipe provided with an operation unit for disconnecting the connection of the underground fire hydrant to the base portion. In this stand pipe, the movable operation part is slid upward so as to be close to the fixed operation part in the operation part, and the locking claw (claw) of the connection structure (female mouthpiece) is connected by the rod connected to the movable operation part. The lock can be released by pulling the part) upward and the locking claw protruding toward the center of the pipe is accommodated to the outside of the pipe, and the stand pipe can be removed from the underground fire hydrant. It is said.

Japanese Unexamined Patent Publication No. 8-13551 Japanese Unexamined Patent Publication No. 10-14624 Japanese Unexamined Patent Publication No. 2018-57471

However, in the underground fire hydrants disclosed in Patent Document 1 and Patent Document 2, the work of pulling up the base part in the fire extinguishing preparation work and the work of accommodating the base part in the basement in the work after the completion of fire extinguishing is a form of kneeling and bending down. Alternatively, it is difficult to say that the complexity of the work is reduced as compared with the above method using a general stand pipe, because the work is performed by reaching out for a crawling or the like. Further, the stand pipe disclosed in Patent Document 3 has a complicated structure and is expensive because it has an unlocking mechanism on the stand pipe side that is independent of the push ring of the male base of the underground fire hydrant. Inevitably, it has already become widespread as an existing fire extinguishing facility, and it is not necessary to replace all the stand pipes installed in the fire hose storage box together with the fire hose and opening tool near the underground fire hydrant. Not realistic.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an underground fire hydrant capable of using a normal stand pipe and reducing the complexity of work when removing the stand pipe. To do.

In order to achieve the above object, the underground fire hydrant according to claim 1 includes a tap water introduction channel into which tap water is introduced, a fire extinguishing discharge channel having a male mouthpiece at the tip, and the tap water introduction channel and fire extinguishing channel. In an underground fire hydrant provided with an on-off valve portion that opens and closes between drainage channels, the male mouthpiece has a base body portion, a push ring, and an locking release assisting portion, and the base body portion is said to be described above. It has a large-diameter tubular portion provided at the upper end of the male mouthpiece and a small-diameter tubular portion provided below the large-diameter tubular portion, and the push ring is the main body of the base. The outside of the small-diameter tubular portion can be moved in the vertical direction, and the unlocking auxiliary portion includes an auxiliary shaft portion having one end attached to the push ring and the other end can extend upward or extend upward. It is characterized by having a grip portion provided at the other end of the auxiliary shaft body portion.

The underground fire hydrant according to claim 2 is the underground fire hydrant according to claim 1, wherein the auxiliary shaft body portion is rotatably attached to the push ring, and the female base of the stand pipe is the same. When it is inserted against the male mouthpiece, it rotates and the other end side extends upward.

The underground fire hydrant according to claim 3 is the underground fire hydrant according to claim 2, wherein the unlocking auxiliary portion further has a stand pipe receiving portion connected to the auxiliary shaft body portion. The stand pipe receiving portion is characterized in that when the female base of the stand pipe is inserted against the male base, the stand pipe is brought into contact with the stand pipe and pushed into the base pipe.

The underground fire hydrant according to claim 4 is the underground fire hydrant according to claim 3, wherein the stand pipe receiving portion orbits the outside of the base body portion, and the female base of the stand pipe is the male. It is characterized by having a stand pipe contact portion with which the stand pipe comes into contact when the stand pipe is applied to the mold base and inserted.

The underground fire hydrant according to claim 5 is the underground fire hydrant according to claim 4, wherein the stand pipe receiving portion has an upright portion erected substantially perpendicular to the outer peripheral portion of the stand pipe receiving portion. It is characterized by doing.

The underground fire hydrant according to claim 6 is the underground fire hydrant according to any one of claims 3 to 5, wherein the push ring has a protruding portion, and the stand pipe receiving portion is a stand. It is characterized in that a holding stopper for holding the auxiliary shaft body portion in a substantially horizontal direction by contacting the upper surface of the protruding portion of the push ring in the state before connecting the pipe is provided.

The specific mediator according to claim 7 is a specific mediator having a male mouthpiece at the upper part and a female type mouthpiece connected to an underground fire extinguisher at the lower part, and the male type mouthpiece is pressed with the base body portion. It has a ring and an unlocking auxiliary portion, and the base body portion is provided with a large-diameter tubular portion provided at the upper end portion of the male-shaped mouthpiece and a lower side of the large-diameter tubular portion. The push ring has a small-diameter tubular portion, and the push ring can move in the vertical direction on the outside of the small-diameter tubular portion of the base body portion, and one end of the lock release assisting portion is the push ring. It is characterized by having an auxiliary shaft body portion that is attached to the other end and the other end side can extend upward, and a grip portion provided at the other end portion of the auxiliary shaft body portion.

According to the underground fire hydrant according to the present invention, a normal stand pipe can be used, and the complexity of the work when removing the stand pipe can be reduced. Further, according to the mediator specific according to the present invention, a normal stand pipe can be used in the existing underground fire hydrant to which the stand pipe is connected, and the complexity of the work when removing the stand pipe can be reduced. ..

It is sectional drawing which shows the underground fire hydrant which concerns on embodiment of this invention (the sectional view cut at the position shown by line AA of FIG. 3). It is a front view which shows the underground type fire hydrant of the same above. It is a top view which shows the underground fire hydrant of the same above. It is the front view which shows in the reduced view when the stand pipe is connected to the underground fire hydrant of the same above. A cross-sectional view (position shown by line BB in FIG. 3) showing an enlarged vicinity of the male base (and the female base of the stand pipe) of the underground fire hydrant when the stand pipe is connected to the underground fire hydrant of the same above. It is a cross-sectional view cut in. It is a front view which shows in a reduced scale when it hits the underground fire hydrant of the same above so that a stand pipe is connected. It is a front view which shows in a reduced state on the way to the state of FIG. 4 after hitting the underground fire hydrant of the same as the stand pipe as shown in FIG. It is a front view which shows the example which made the auxiliary shaft body part of the underground fire hydrant of the same above into a nested tubular shape. It is a top view which shows the example which provided the grip part connection part in the underground type fire hydrant of the same above. It is a cross-sectional view cut at the position shown by the line CC of FIG. 3 of the underground fire hydrant of the same above, and shows the vicinity of the holding stopper. FIG. 5 is a cross-sectional view (cross-sectional view corresponding to FIG. 1) showing an example in which the above-mentioned underground fire hydrant is configured by connecting a mediator concrete to an existing underground fire hydrant. It is sectional drawing which shows the structure of an example shown in FIG. 11 of the above-mentioned underground fire hydrant, (a) is a concrete mediator, and (b) is an existing underground fire hydrant. It is a front view which shows the example which joined the auxiliary shaft body part of the underground type fire hydrant of the same above, and attached to the protruding part of the cross part of a push ring. It is a plan view of the example shown in FIG. 13A of the above-mentioned underground fire hydrant, in which (a) is not provided with a grip portion connecting portion, and (b) is provided with a grip portion connecting portion. It is a front view which shows another example which joined the auxiliary shaft body part of the same underground type fire hydrant and attached to the protruding part of the cross part of a push ring, and (a) shows the contracted state, (b). Indicates a stretched state. It is a front view showing still another example in which the auxiliary shaft body part of the underground fire hydrant of the same above is joined and attached to the protruding part of the crossguard part of the push ring, and (a) shows the contracted state, (b). ) Indicates a stretched state. It is a front view showing still another example in which the auxiliary shaft body part of the underground fire hydrant of the same above is joined and attached to the protruding part of the crossguard part of the push ring, and (a) shows the contracted state, (b). ) Indicates a stretched state. It is a top view corresponding to FIGS. 16A (a) and 16A (b) of the above-mentioned underground fire hydrant. FIG. 16A of the above-mentioned underground fire hydrant is a front view showing an example in which expansion and contraction is automatically performed, in which (a) shows a contracted state and (b) shows an extended state. .. It is a top view corresponding to FIG. 17A (a) of the underground fire hydrant of the same above.

Hereinafter, modes for carrying out the present invention will be described. As shown in FIGS. 1 to 3, the underground fire hydrant 1 according to the embodiment of the present invention includes a tap water introduction passage 2 into which tap water is introduced, a fire extinguishing discharge passage 4 having a male mouthpiece 3 at the tip, and a fire extinguishing discharge passage 4. It is provided with an on-off valve portion 5 that opens and closes between the tap water introduction passage 2 and the fire extinguishing discharge passage 4. The on-off valve portion 5 functions so that the lower end 5b opens and closes between the tap water introduction passage 2 and the fire extinguishing discharge passage 4 by rotating the upper end 5a using an opening tool or the like (see FIG. 1).

The male base 3 of the underground fire hydrant 1 has the function of a plug-in type (Machino type) male base similar to the male base of a normal underground fire hydrant, and is unlocked from the base body 31. It has a push ring 32 as a mechanism. The base body portion 31 has a large-diameter tubular portion 31a and a small-diameter tubular portion 31b. The large-diameter tubular portion 31a is provided at the upper end of the male base 3, and the small-diameter tubular portion 31b is provided below the large-diameter tubular portion 31a so as to form a step with the large-diameter tubular portion 31a. The male base 3 can be made of metal.

The push ring 32 is movable and rotatable in the vertical direction on the outside of the small-diameter tubular portion 31b of the base body portion 31, and has a tubular base portion 32b and a crossguard portion 32a provided below the tubular base portion 32b. It is composed. The tubular base portion 32b is a portion that surrounds the outside of the small-diameter tubular portion 31b of the base body portion 31. The crossguard portion 32a has two projecting portions 32aa that project outward symmetrically (symmetrically with respect to the axis of the male base 3) (see FIG. 3). The protruding portion 32aa extends outward from the large-diameter tubular portion 31a of the base body portion 31 (see FIG. 3). The projecting portion 32aa has an auxiliary shaft body portion mounting portion 32aaa below the projecting portion 32aa (see FIG. 5). The auxiliary shaft body portion 32aaa refers to a portion to which the auxiliary shaft body portion 33a described later can be attached, and the shape thereof is not particularly limited, and is particularly distinguished from other parts of the protruding portion 32aa. It does not have to be the shape to be formed. Further, in FIG. 3, the line originally appearing around the male base 3 in the portion below the male base 3 is omitted for the sake of comprehension.

The stand pipe SP can use a general stand pipe, and has a female base SA and a flange portion SF serving as a peripheral portion at the bottom thereof (connection portion with the underground fire hydrant 1) (FIG. FIG. 5). The female mouthpiece SA has a claw portion SAa that is urged inward by a spring (see FIG. 5). When preparing to extinguish a fire, the stand pipe SP is locked by inserting the female base SA into the male base 3 of the underground fire hydrant 1 and bringing the claw portion SAa into contact with the small diameter tubular portion 31b of the base body 31. As shown in FIGS. 4 and 5, it is possible to connect to the underground fire hydrant 1. Further, when the fire extinguishing is completed, the stand pipe SP is a cylinder by pulling up (pulling toward the stand pipe SP side) the push ring 32 (specifically, the protruding portion 32aa of the flange portion 32a) of the male base 3 of the underground fire hydrant 1. The shape base portion 32b moves the claw portion SAa of the stand pipe SP outward to release the lock. As a result, the stand pipe SP can be removed from the underground fire hydrant 1.

The male base 3 of the underground fire hydrant 1 further has an unlocking assisting portion 33 that assists in unlocking by the push ring 32. In the present embodiment, the unlocking auxiliary portion 33 has an auxiliary shaft body portion 33a, a grip portion 33b, and a stand pipe receiving portion 33c (see FIG. 2 and the like).

One end (base end) of the auxiliary shaft body portion 33a is attached to the protruding portion 32aa of the crossguard portion 32a of the push ring 32, and the other end side can extend upward (usually upward in the vertical direction) (FIG. FIG. 4). Normally, two auxiliary shaft body portions 33a are provided corresponding to the protruding portions 32aa of the two crossguard portions 32a (see FIG. 3). Specifically, the auxiliary shaft body portion 33a is rotatably attached to the protruding portion 32aa of the collar portion 32a at the auxiliary shaft body portion mounting portion 32aa (see FIG. 5), and the female base SA of the stand pipe SP is used. When it is inserted against the male mouthpiece 3, it rotates and the other end side extends upward (see FIG. 4). At this time, the other end (upper end) of the auxiliary shaft body 33a can be brought to the ground or near the ground below the ground, depending on the depth of installation of the underground fire hydrant 1. In the state before the stand pipe is connected before the stand pipe SP is inserted, the auxiliary shaft body portion 33a is normally extended in a substantially horizontal direction (see FIG. 6), and rotates when the stand pipe SP is inserted (see FIG. 6). (See FIG. 7). As the auxiliary shaft body portion 33a, a thin rod-shaped one or a thin pipe-shaped one can be used.

The auxiliary shaft body portion 33a is specifically attached to the auxiliary shaft body portion mounting portion 32aa of the protruding portion 32aa of the collar portion 32a by the mounting member 32aa (see FIG. 5). The auxiliary shaft body portion 33a and the auxiliary shaft body portion mounting portion 32aaa each have a hole portion, and no female screw is formed in the hole portion (through hole) of the auxiliary shaft body portion 33a, and the auxiliary shaft body portion mounting portion 32aaa A female screw is formed in the hole of the. The mounting member 32aa passes through the hole of the auxiliary shaft body 33a and is screwed into the hole of the shaft body mounting portion 32aa. As a result, the auxiliary shaft body portion 33a is rotatably attached to the protruding portion 32aa of the collar portion 32a. A female screw is formed in the hole of the auxiliary shaft body 33a, and the hole of the auxiliary shaft body mounting portion 32aaa can be made a through hole in which the female screw is not formed.

The material of the auxiliary shaft body portion 33a is not particularly limited, or is not particularly limited to one type of material alone or a combination of two or more types of materials, but the attachment portion of the collar portion 32a to the protruding portion 32aa is not particularly limited. The portion 33ab extending toward the other end side of the vicinity portion 33aa can be made of a light structure and / or material. For example, the portion 33aa in the vicinity of the attachment portion of the flange portion 32a to the protruding portion 32aa may be a casting, and the portion 33ab extending to the other end side thereof may be made of a stainless steel pipe or a resin. Then, when the other end side of the auxiliary shaft body portion 33a is rotated so as to extend upward, it becomes easy to rotate. In FIGS. 1 to 3, a part of the portion 33aa inserted into the portion 33ab is shown by a broken line at the connecting portion between the portion 33aa and the portion 33ab.

The auxiliary shaft body portion 33a can be expanded and contracted by forming a nested tubular shape or the like. For example, the portion 33ab of the auxiliary shaft body portion 33a can be composed of a nested tubular portion 33aba and a portion 33abb, as shown in FIG. Then, the other end (tip) of the auxiliary shaft body 33a (the upper end when the connection of the stand pipe SP is completed) is placed above or below the ground in response to various distances from the underground fire hydrant 1 to the ground. It can be made even easier to reach the vicinity of the ground. Note that FIG. 8 shows a state in which the portion 33ab is contracted, and a part of the portion 33ab inserted into the portion 33ab is shown by a broken line.

The grip portion 33b is provided at the other end (tip portion) of the auxiliary shaft body portion 33a so that the operator can grip it. The grip portion 33b can be provided by being integrally molded with the auxiliary shaft body portion 33a or by being joined to the auxiliary shaft body portion 33a by welding or the like. The grip portion 33b is not particularly limited, but can be extended in the horizontal direction when the other end side of the auxiliary shaft body portion 33a is extended upward so as to be easy to grip (FIG. 4). reference). Normally, two grip portions 33b are provided, and each is provided on each auxiliary shaft body portion 33a. In that case, as shown in FIG. 9, it is possible to connect the two grip portions 33b to provide the grip portion connecting portion 33ba. Then, the two auxiliary shaft bodies 33a can be operated (specifically, pulled up) from the grip portion connecting portion 33ba with one hand via the two grip portions 33b, and another operation (for example, for example) can be performed with the other hand. Support for the stand pipe SP, etc.) is also possible.

The stand pipe receiving portion 33c is connected to the auxiliary shaft body portion 33a. The stand pipe receiving portion 33c can be joined to the auxiliary shaft body portion 33a by welding or the like, or can be integrally formed with the auxiliary shaft body portion 33a to be connected. Further, all of the parts of the stand pipe receiving portion 33c, which will be described later, are preferably integrally formed, but some of them may be joined by welding or the like. The stand pipe receiving portion 33c is pushed into the stand pipe SP (specifically, the flange portion SF) in contact with the stand pipe SP when the female base SA of the stand pipe SP is inserted against the male base 3 (see FIG. 6). Is done. As a result, the auxiliary shaft body 33a rotates with the attachment point of the auxiliary shaft body 33a to the protruding portion 32aa of the crossguard 32a as a fulcrum, and the other end side extends upward (FIGS. 7 and 4). reference).

The stand pipe receiving portion 33c is located above the attachment portion of the auxiliary shaft body portion 33a to the protruding portion 32aa of the flange portion 32a in the state before the stand pipe is connected, and is in contact with the stand pipe SP (stand pipe contact portion 33ca). ) (See FIG. 2). When the stand pipe SP is pushed in, the stand pipe contact portion 33ca serves as a fulcrum at the attachment point of the auxiliary shaft body portion 33a to the protruding portion 32aa of the collar portion 32a. The stand pipe contact portion 33ca orbits the outside of the base body portion 31 (see FIG. 3). When the stand pipe contact portion 33ca orbits in this way, the contact area with the stand pipe SP becomes large, so that the stand pipe SP can be pushed in stably.

Further, the stand pipe contact portion 33ca has a central portion (central portion in a plan view) extending outward (see FIG. 3), and an upright portion 33cc erected substantially vertically is provided on the outer peripheral portion thereof. There is. The upright portion 33cc extends above the large-diameter cylindrical portion 31a of the base body portion 31 (see FIG. 2).

The portion of the stand pipe contact portion 33ca that extends outward can be brought into contact with the stand pipe SP having a large flange portion SF so that it can be pushed in stably. By contacting the standing portion 33cc with the stand pipe SP before pushing it into the standing pipe SP to confirm the position, the centering (alignment) of the stand pipe SP becomes easy.

Further, the portion of the stand pipe contact portion 33ca that extends outward and the standing portion 33cc are located at positions away from the attachment portion (fulcrum portion) of the auxiliary shaft body portion 33a to the protruding portion 32aa of the collar portion 32a. Therefore, it is possible to have a function as a balancer for rotating the auxiliary shaft body portion 33a so that the other end side extends upward. That is, the force that causes the auxiliary shaft body 33a to return to the state before the stand pipe is connected due to the balance between the weight of the portion that extends outward and the weight of the standing portion 33cc and the weight of the auxiliary shaft body 33a in the stand pipe contact portion 33ca. Can be reduced to make it easier for the auxiliary shaft body portion 33a to stand up.

The stand pipe receiving portion 33c has a portion (auxiliary shaft body connecting portion 33cc) that connects (connects) the stand pipe contact portion 33ca and the auxiliary shaft body portion 33a (see FIG. 2).

Further, as shown in FIGS. 3 and 10, the stand pipe receiving portion 33c is in contact with the upper surface of the protruding portion 32aa of the flange portion 32a in the state before the stand pipe is connected, so that the auxiliary shaft body portion 33a is substantially horizontal. A holding stopper 33cd for holding the extended state is provided. Specifically, the holding stopper 33cd is provided so as to be connected to the auxiliary shaft body connecting portion 33cc. The holding stopper 33cd may be provided on only one of the two protruding portions 32aa of the crossguard portion 32a (the upper one in FIG. 3), but may be provided on both. Further, the holding stopper 33cd has an R (R) on the protruding portion 32aa or a taper so that the protruding portion 32aa does not block the movement when the auxiliary shaft body portion 33a rotates (see FIG. 10). It can be attached. In FIG. 3, a portion hidden under the holding stopper 33cd (a part of the protruding portion 32aa or the like) is indicated by a broken line.

In the male base 3 having the unlocking auxiliary portion 33 having the structure described above, when the female base SA of the stand pipe SP is inserted when preparing for fire extinguishing, the auxiliary shaft body portion 33a rotates and the other end. The side extends upward. Since the auxiliary shaft body portion 33a rotates at the time of insertion, it can be confirmed that the stand pipe SP is accurately inserted. When the fire extinguishing is completed, the auxiliary shaft body portion 33a in a state of extending upward to above the ground or near the ground below the ground is pulled up by gripping and pulling up the grip portion 33b. At this time, it is not necessary to reach out in the appearance of kneeling and bending over or crawling on the stomach. As a result, the push ring 32 (specifically, the protruding portion 32aa of the collar portion 32a) is pulled up to release the lock between the male base 3 and the female base SA, and the stand pipe SP can be removed from the underground fire hydrant 1. can.

In the underground fire hydrant 1, a general ordinary stand pipe can be used for the stand pipe SP without using a stand pipe having a particularly special structure (for example, Patent Document 3 or the like). Further, in the underground fire hydrant 1, the lock between the male base 3 and the female base SA can be released by using the unlocking auxiliary portion 33 having a simple structure, and the male type base 3 and the female type base SA can be released, and the person is dressed as kneeling and bending down. Since it is not necessary to reach for a crawling or the like, it is possible to reduce the complexity of the work when removing the stand pipe SP. Further, when the stand pipe SP is removed, the auxiliary shaft body portion 33a rises upward from the push ring 32 (it is attached in a state of being established on the push ring 32), so that it is handled specially for the operator. It can be understood that the locking can be released by pulling up the gripping portion 33b of the locking release assisting portion 33 at first glance without the need for an instruction manual or the like. Further, when mud or the like is caught and fixed between the push ring 32 and the stand pipe SP, it is possible to remove the mud or the like by holding the grip portion 33b and moving it up or down or rotating it.

Further, in the existing underground fire hydrant, the existing male base can be simply replaced with the male base 3 described above, or the structure of the existing male base can be processed to obtain the male base 3. .. When the configuration of the existing male base is processed into the male base 3, various forms are possible. For example, a form using the mediator concrete 3A as shown in FIG. 11 is also possible.

As shown in FIG. 12A, the mediator specific 3A includes the above-mentioned base body portion 31 (that is, the above-mentioned large-diameter tubular portion 31a and the above-mentioned small-diameter tubular portion 31b) and the push ring 32 (that is, the above-mentioned crossguard). It has a portion 32a, a cylindrical base portion 32b), and an unlocking auxiliary portion 33 (that is, the auxiliary shaft body portion 33a, the grip portion 33b, and the stand pipe receiving portion 33c described above). The mediator concrete 3A also has a female base 34 at the bottom thereof, which is similar to the female base SA of the stand pipe SP described above. A flange portion 35 is provided around the female base 34. The female mouthpiece 34 has a claw portion 34a similar to the claw portion SAa described above.

As shown in FIG. 12B, the existing underground fire hydrant 1'has its own base body portion 31'(that is, the large-diameter tubular portion 31a'and the small-diameter tubular portion 31b') and its own push. It has a ring 32'(ie, a collar 32a'and a tubular base 32b'). As shown in FIG. 11, the mediator concrete 3A is connected to the underground fire hydrant 1'by contacting the claw portion 34a with the small-diameter tubular portion 31b'of the mouthpiece main body 31'and locking the female mouthpiece 34. Be connected. In this way, the underground fire hydrant 1 composed of the mediator concrete 3A and the underground fire hydrant 1'becomes a part composed of the mediator concrete 3A, the base body 31'and the push ring 32' as the male base 3. It can be used in the same manner as that described above based on FIGS. 1 to 10.

This underground fire hydrant 1 can be easily constructed because it is sufficient to manufacture a mediator concrete 3A at a factory or the like, carry it and connect it to an existing underground fire hydrant 1', and the underground fire hydrant 3A is an underground fire hydrant. Since it can be attached to 1'with one touch in a short time, efficient construction is possible. In this case, for example, the mediator can be attached to the underground fire hydrant 1'with the mediator concrete 3A attached to the stand pipe SP in advance, and then the stand pipe SP can be removed by the unlocking auxiliary unit 33. Even when the specific 3A is attached to the underground fire hydrant 1', it is not necessary to reach for the appearance of kneeling and bending over or crawling on the stomach. It is also possible to connect the mediator concrete 3A to the underground fire hydrant 1'that is not already installed (not yet installed) to form the underground fire hydrant 1.

Although the underground fire hydrant according to the embodiment of the present invention has been described above, the present invention is not limited to the one described in the above-described embodiment, and various matters within the scope of the claims. The design can be changed.

For example, the operations of the two auxiliary shaft body portions 33a may become independent, or some of the above-mentioned advantages regarding the stand pipe contact portion 33ca may not be obtained, but the stand pipe contact portion 33ca is the base main body portion. It is also possible so that the stand pipe receiving portion 33c is divided so as not to go around the outside of the 31.

Further, in some cases, it is possible to omit either of the two auxiliary shaft body portions 33a (and the grip portion 33b) to make one of the two auxiliary shaft body portions 33a (and the grip portion 33b). In this case, the stand pipe receiving portion 33c that orbits the outside of the base body portion 31 is also rotated to the other side of the push ring 32 (for example, the other of the two protruding portions 32aa of the crossguard portion 32a of the push ring 32). If it is attached as possible, the push ring 32 can be smoothly pulled up even if one of the auxiliary shaft body portions 33a (and the grip portion 33b) is attached.

Further, the auxiliary shaft body portion 33a is rotatably attached to the protruding portion 32aa of the crossguard portion 32a of the push ring 32, but as shown in FIGS. 13A and 13B, the auxiliary shaft body portion 33a is in a state of extending upward (while being established). It is also possible to join (fix it so that it cannot rotate) and attach it to the protruding portion 32aa of the collar portion 32a. In this case, the other end side of the auxiliary shaft body portion 33a always extends upward, and the auxiliary shaft body portion 33a does not rotate when the stand pipe SP is inserted, so that the auxiliary shaft body portion 33a is inserted accurately. It is no longer easy to check. On the other hand, since the rotation function and the stand pipe receiving portion 33c can be omitted, the cost can be reduced. In the example shown in FIG. 13A, the auxiliary shaft body portion 33a has a male screw formed at the lower end thereof, which penetrates the protruding portion 32aa and is attached to the lower side by a mounting member (nut or the like) 32aac. It is also possible to attach by welding or the like without using the attachment member 32aac. Further, as described above, as shown in FIG. 13B (b), it is also possible to provide the grip portion connecting portion 33ba by connecting between the two grip portions 33b. Further, in FIGS. 13A and 13B (and FIGS. 14, 15, 16A, 16B, 17A, and 17B described later), all but the male base 3 are omitted.

As shown in FIG. 14, the auxiliary shaft body portion 33a is joined in a state of extending upward (fixed so as not to be rotatable) and attached to the protruding portion 32aa of the crossguard portion 32a of the push ring 32. It can be expanded and contracted by including a nested tubular portion 33ac and a portion 33ad. Further, as shown in FIG. 15, the auxiliary shaft body portion 33a can be made bendable by including a portion 33ae and a portion 33af that can rotate with respect to the portion 33ae. Further, in the example shown in FIGS. 14 and 15 (and FIG. 16A (FIG. 16B) described later), the grip portion connecting portion 33ba is provided by connecting between the two grip portions 33b in the same manner as described above. In that case, in addition to the above-mentioned effects, the expansion / contraction operation or the bending operation (and vice versa) becomes easy. As the plan view corresponding to FIGS. 14 (a), 14 (b) and 15 (b), the same plan view as shown in FIG. 13B can be used.

Further, as shown in FIGS. 16A and 16B, the auxiliary shaft body portion 33a includes the portion 33ag and the slidable portion 33ah in parallel with the portion 33ag (parallel by changing the position in the plan view). It can also be expanded and contracted. In FIGS. 16A and 16B, what is indicated by reference numeral 33ai is a member that changes the positions of the portion 33ag and the portion 33ah in a plan view. In this way, since there are few restrictions on the length of the portion 33ah, the difference in expansion and contraction can be increased.

Further, it is also possible to automatically expand and contract the auxiliary shaft body portion 33a by inserting and removing the stand pipe SP by using the configurations shown in FIGS. 16A and 16B. In this case, as shown in FIGS. 17A and 17B, a stand pipe receiving portion 33c'having the same configuration as the above-mentioned stand pipe receiving portion 33c and an auxiliary shaft body supporting portion 33d connected thereto can be provided. .. The auxiliary shaft body support portion 33d can have a shape substantially similar to that obtained by extending the length of the portion 33aa of the auxiliary shaft body portion 33a shown in FIGS. 1 to 3 and the like. The stand pipe receiving portion 33c'and the auxiliary shaft body supporting portion 33d can be rotatably attached to the push ring 32 (see FIGS. 17A and 17B), or the housing of the underground fire hydrant 1 below the stand pipe receiving portion 33c'and the housing of the underground fire hydrant 1 below it (for example, It can be rotatably attached to the attachment portion of the male base 3 or the peripheral wall portion of the fire extinguishing drainage channel 4. When attached to the housing or the like of the underground fire extinguisher 1 below the push ring 32, the rotation center axis is lowered, so that the length of the auxiliary shaft body support portion 33d can be made longer, and the grip portion 33b can be placed on the ground or on the ground. It can be extended further upward to near the ground below the ground.

In this way, if the stand pipe SP is not inserted, as shown in FIG. 17A (a), the portion 33ah of the auxiliary shaft body portion 33a is in the lowered state, that is, the auxiliary shaft body portion 33a is in the contracted state. be. When the stand pipe SP is inserted, the stand pipe receiving portion 33c'receives it, the auxiliary shaft body supporting portion 33d rotates, and as shown in FIG. 17A (b), the portion 33ah of the auxiliary shaft body portion 33a is inserted. When pushed up, the auxiliary shaft body portion 33a is in an extended state. When the stand pipe SP is removed, the stand pipe receiving portion 33c'and the auxiliary shaft body support portion 33d rotate in the opposite direction to those when the stand pipe SP is inserted, and the portion 33ah of the auxiliary shaft body portion 33a descends. The state returns to the state shown in FIG. 17A (a). In FIG. 17A, (a) and (b) are shown vertically offset from each other for convenience of illustration.

Further, the locking release assisting portion 33 can be directly attached to the protruding portion 32aa of the flange portion 32a of the push ring 32, or can be attached to the protruding portion 32aa via another member. Further, the underground fire hydrant 1 can be applied even when the push ring 32 does not have the protruding portion 32aa of the crosspiece 32a (furthermore, the case where the crossguard 32a itself is not provided). In that case, an external member that replaces the protruding portion 32aa is joined or integrally formed with the flange portion 32a or the tubular base portion 32b by welding or the like, and the auxiliary shaft body portion 33a is rotated on the external member as described above. It can be mounted movably (or, in the example of FIG. 13A, joined (fixed non-rotatably)). Alternatively, instead of the protruding portion 32aa, a portion corresponding to the protruding portion 32aa is added to the auxiliary shaft body portion 33a so that it can be rotatably attached to the collar portion 32a or the cylindrical base portion 32b (or, in the example of FIG. 13A, it is joined (rotated)). It can also be attached)) by fixing it impossible. By doing so, the auxiliary shaft body portion 33a is attached to the push ring 32 via the external member or the additional portion of the auxiliary shaft body portion 33a.

Further, the mediator concrete 3A is shown in FIG. 13A and FIG. 13B, FIG. 14, FIG. 15, FIG. 16A and FIG. 16B, FIG. 17A and FIG. It is also possible to.

It should be noted that the underground fire hydrant 1 includes not only one placed underground such as a road, but also one placed below the surface of the structure in which a person's foot touches. Needless to say, the underground fire hydrant 1 can also be applied to a fire hydrant 1 having a combined function such as having an air valve.

1, 1'Underground fire extinguisher 2 Tap water introduction path 3 Male mouthpiece 31, 31'Mouthpiece body 31a, 31a'Large diameter tubular part 31b, 31b'Small diameter tubular part 32, 32' Push ring 32a, 32a' Push Ring collar 32aa Auxiliary shaft attachment part of the protrusion of the push ring flange 32aa Auxiliary shaft attachment part of the protrusion of the push ring flange 32aa Mounting member 32aac Mounting member 32b, 32b'Cylindrical base of push ring 33 Unlocking auxiliary part 33a Auxiliary shaft body part of unlocking auxiliary part 33aa Protrusion of collar part in auxiliary shaft part of unlocking auxiliary part The part near the attachment point to the part 33ab The part on the other end side of the auxiliary shaft part of the unlocking auxiliary part 33aba The part on one side of the nested tubular part in the auxiliary shaft part of the locking release assisting part 33abb Unlocking assistance The other side of the nested tubular part in the auxiliary shaft part of the part 33ac The part near the attachment point of the collar part in the auxiliary shaft part of the unlocking auxiliary part 33ad In the auxiliary shaft part of the unlocking auxiliary part Part on the other end side 33ae Part near the attachment point of the collar on the auxiliary shaft of the unlocking auxiliary part 33af The part on the other end side of the auxiliary shaft of the unlocking assisting part 33ag A part of the auxiliary shaft body of the stop release assisting part near the attachment point of the flange to the protruding part 33ah A part of the auxiliary shaft body of the locking release assisting part on the other end side 33ai Auxiliary shaft body of the locking release assisting part A member that changes the position of the portion near the mounting location and the portion on the other end side in a plan view 33b Grip part of the unlocking assisting part 33ba Gripping part connecting part of the unlocking assisting part 33c, 33c'Unlocking assisting part Stand pipe receiving part of the part 33ca Stand pipe contact part of the stand pipe receiving part of the unlocking auxiliary part 33cc Standing part of the stand pipe receiving part of the unlocking auxiliary part 33cc Assisting the stand pipe receiving part of the unlocking auxiliary part Shaft body connection part 33cd Holding stopper of stand pipe receiving part of unlocking auxiliary part 33d Auxiliary shaft body support part of locking release assisting part 34 Mediator concrete female base 34a Mediating metal concrete female mouthpiece claw 35 Mediating metal concrete flange 3A Mediating metal concrete 4 Fire extinguishing water discharge channel 5 On-off valve part 5a Upper end of on-off valve part 5b Lower end of on-off valve part SP Stand pipe SA Stand pipe female base SAa Stand pipe Claw part of female mouthpiece SF Stand pipe flange part

Claims (7)

In an underground fire hydrant provided with a tap water introduction channel into which tap water is introduced, a fire extinguishing discharge channel having a male mouthpiece at the tip, and an on-off valve portion that opens and closes between the tap water introduction path and the fire extinguishing discharge channel.
The male mouthpiece has a mouthpiece main body, a push ring, and an unlocking auxiliary part.
The base body has a large-diameter tubular portion provided at the upper end of the male base and a small-diameter tubular portion provided below the large-diameter tubular portion.
The push ring can move in the vertical direction on the outside of the small-diameter cylindrical portion of the base body portion.
The unlocking auxiliary portion includes an auxiliary shaft body portion whose one end is attached to the push ring and whose other end side can extend upward or extends, and a grip portion provided at the other end of the auxiliary shaft body portion. An underground fire hydrant characterized by having. In the underground fire hydrant according to claim 1,
The auxiliary shaft body portion
It is rotatably attached to the push wheel and
An underground fire hydrant characterized in that when a female mouthpiece of a stand pipe is inserted against the male mouthpiece, it rotates and the other end side extends upward. In the underground fire hydrant according to claim 2.
The unlocking auxiliary portion is
Further, it has a stand pipe receiving portion connected to the auxiliary shaft body portion.
The stand pipe receiving portion is an underground fire hydrant characterized in that when the female base of the stand pipe is inserted against the male base, the stand pipe is brought into contact with the stand pipe and pushed into the base pipe. In the underground fire hydrant according to claim 3,
The stand pipe receiving portion is
An underground fire hydrant that circulates around the outside of the base body and has a stand pipe contact portion that the stand pipe comes into contact with when the female base of the stand pipe is inserted against the male base. .. In the underground fire hydrant according to claim 4,
The stand pipe receiving portion is
An underground fire hydrant characterized by having an upright portion erected substantially vertically on the outer peripheral portion of the stand pipe receiving portion. In the underground fire hydrant according to any one of claims 3 to 5.
The push ring has a protrusion and
The stand pipe receiving portion is
Underground, which is provided with a holding stopper that holds the auxiliary shaft portion in a substantially horizontal direction by contacting the upper surface of the protruding portion of the push ring in the state before connecting the stand pipe. Type fire hydrant. A vector with a male cap at the top and a female cap at the bottom that connects to an underground fire hydrant.
The male mouthpiece has a mouthpiece main body, a push ring, and an unlocking auxiliary part.
The base body has a large-diameter tubular portion provided at the upper end of the male base and a small-diameter tubular portion provided below the large-diameter tubular portion.
The push ring can move in the vertical direction on the outside of the small-diameter cylindrical portion of the base body portion.
The unlocking auxiliary portion includes an auxiliary shaft body portion whose one end is attached to the push ring and whose other end side can extend upward or extends, and a grip portion provided at the other end of the auxiliary shaft body portion. The intermediary money specifically characterized by having.

Images