JP2007267764A - Head dustproof structure and dustproof cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent water spray trouble caused by a cap separated from a head water-discharge section separated from a water discharge pressure. <P>SOLUTION: The head 10 has a band fixing fitting projection 24 projecting from the head body 12, and a positioning projection 24 projecting adjacent thereto. Dustproof caps 16-1 and 16-2 have cap bodies 18-1 and 18-2 mounted on head water-discharge sections 14-1 and 14-2, band fixing sections 22-1 and 22-2 to be fixed to the head body 12, and band sections 20-1 and 20-1 connecting the cap bodies 18-1 and 18-2 to the band fixing sections 22-1 and 22-2. The band fixing sections 22-1 and 22-2 are fitted to the fitting projection 24 and the direction of the band sections 20-1 and 20-2 is so set as to prevent the cap bodies 18-1 and 18-2 separated from the positioning projection 34 from causing the water spraying trouble. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a head dustproof structure and a dustproof cap that are detachably mounted on a head that is disposed at the tip of a pipe and sprays fire-extinguishing water.

  Conventionally, water spray heads used for tunnel disaster prevention equipment, open sprinkler heads used for disaster prevention equipment, foam heads, etc. are dry-type pipes that are not filled with water, so insects and dust enter from the discharge part of the head and clog holes. there is a possibility. Also, depending on the surrounding environmental conditions such as vehicle exhaust gas, hot springs, coastal areas, etc., the metal discharge part may corrode and the predetermined watering performance may not be maintained. In order to solve this problem, a dust cap is attached to the head.

  FIG. 9 shows a dust-proof cap for a water spray head installed in a conventional tunnel. The head 110 is composed of a head water discharge unit 101 mounted on the head main body 104, and the cap 100 is mounted on the head water discharge unit 101 and integrated with the cap 100. The end of the band 102 connected to the head body 104 is connected to the head main body 104 by fitting a hole provided in the band 102 into the band holding projection 106. The head main body 104 is provided with two head water discharge portions 101 and uses two caps 100 each having a band 102.

In the event of a fire, the cap 100 is detached and sprinkled with water discharge pressure applied to the head water discharge unit 101. Since the cap 100 released by the water discharge pressure is connected to the head main body 104 by the band 102, it does not scatter and the cap 100 is fitted back into the head water discharge portion 101 after the water discharge is stopped.
JP 2001-95935 A Japanese Patent Laid-Open No. 11-4908

  However, in such a conventional dustproof cap, when the cap 100 is detached and sprinkled by the water discharge pressure applied to the head water discharge unit 101, the removed cap 100 is connected to the head main body 104 by the band 102. Therefore, although it does not scatter, since it does not leave from the immediate vicinity of the head water discharge part 101 with the band 102, the water sprayed hits the cap 100, causes the problem of water spraying, and has the problem that the expected water distribution cannot be maintained.

It is an object of the present invention to provide a head dustproof structure and a dustproof cap that can reliably prevent a water spray failure caused by a cap that is detached from a head water discharge portion due to a water discharge pressure.

In order to achieve this object, the present invention is configured as follows. The present invention provides a head dustproof structure. The present invention relates to a head dustproof structure in which a dustproof cap is detachably attached to a head water discharge portion of a head disposed at the tip of a pipe.
The head includes a band-fixing fitting protrusion protruding from the head body and a positioning protrusion protruding in the vicinity of the protrusion.
The dustproof cap includes a cap body attached to the head water discharge part, a band fixing part fixed to the head body, a band part in which the cap body is connected to one end and the band fixing part is connected to the other end, and a band fixing part. The fitting hole formed and fitted to the fitting protrusion of the head and the positioning hole fitted to the positioning protrusion of the head and determining the arrangement direction of the band are integrally formed of a flexible material. To do.

  Here, the positioning protrusion is provided at a position where the direction of the straight line connecting the positioning protrusion and the fitting protrusion is the direction away from the watering direction of the cap body that has been detached by the water spraying of the head water discharge portion.

  The fitting protrusion provided on the head body has a retaining head following the protruding shaft, and the fitting hole of the dust cap is smaller in diameter than the retaining head, and a slit is formed in the direction across the fitting hole. The fitting hole can be expanded, and the positioning hole is also used as a slit.

  The band portion of the dustproof cap may be bent in a V shape with respect to the longitudinal direction.

  In the head dustproof structure of the present invention, when the dustproof head has at least two head water discharge portions, two sets of dustproof caps corresponding to the head water discharge portions are attached to the head main body by the fitting holes and positioning holes of the respective band fixing portions. The cap projections and the positioning projections are fitted and fixed, and in this fixed state, each cap body is mounted on each head water discharge portion with the band portions of the two dustproof caps twisted at least once.

  The present invention provides a dustproof cap that is detachably attached to a head disposed at the tip of a pipe. The dustproof cap of the present invention includes a cap body attached to the head water discharge part of the head, a band fixing part fixed to the head main body of the head, a band in which the cap body is connected to one end and the band fixing part is connected to the other end. , A fitting hole that is formed in the band fixing portion and is fitted into the fitting protrusion of the head, and a positioning hole that is fitted into the positioning protrusion of the head and determines the arrangement direction of the band is integrated with a flexible material. It is characterized by being formed.

Here, the slit is formed in a direction crossing the fitting hole of the dustproof cap so that the fitting hole can be expanded, and the positioning hole is also used as the slit. The band portion may be bent in a V shape with respect to the longitudinal direction.

  According to the present invention, when fixing the band portion of the dustproof cap to the head body, the fitting protrusion and the positioning protrusion are provided on the head body, and the fitting hole and the positioning hole are correspondingly provided in the band fixing portion of the dustproof cap. The cap body is detached from the head water discharge part by watering by supporting the band part in the direction of a straight line extending from the fitting protrusion and the positioning protrusion of the head body. When the free state is reached, the cap body can be held in a direction away from the watering direction of the head watering portion, so that it is possible to reliably prevent watering troubles caused by the water sprayed on the detached cap body.

  In addition, by bending the band part of the dust-proof cap into a V shape, when the cap body is blown away with water sprayed from the head watering part, the bent part of the V shape extends in the release direction and absorbs the stress applied to the band part. And it can prevent reliably that a band part is fractured | ruptured with the force added with watering pressure, and a cap main body is lost.

  In addition, when two sets of dust caps are attached to the head body with the band fixing part, the cap body is detached by watering by attaching each cap body to each head water discharge part after twisting the two band parts once In addition, by returning the twist of the band part, it is possible to detach more reliably to a position deviating from the watering direction.

Further, rattling of the fitting portion with respect to the head main body of the band fixing portion is not caused by twisting of the band portion, and the band portion can be integrated and the appearance can be improved.

  FIG. 1 is an explanatory view showing an embodiment of a head dustproof structure according to the present invention. In FIG. 1, the head 10 has a head main body 12, and in the present embodiment, two head water discharge portions 14-1 and 14-2 are attached to the head main body 12. The head main body 12 is provided with a fitting protrusion 24, and a positioning protrusion 26 is provided in the vicinity of the fitting protrusion 24.

  Two sets of dust caps 16-1 and 16-2 are attached to the head 10. The dust caps 16-1 and 16-2 are composed of cap bodies 18-1 and 18-2, band portions 20-1 and 20-2, and band fixing portions 22-1 and 22-2. 1 and 2-2 are fitted and fixed to a fitting protrusion 24 and a positioning protrusion 26 provided on the head body 12.

  The dust caps 16-1 and 16-2 can be made by injection molding of a flexible synthetic resin. The synthetic resin used for the dustproof caps 16-1 and 16-2 preferably has a load deflection temperature exceeding 100 ° C. in order to prevent it from loosening and coming off due to a temperature rise, and further use a polyester-based elastomer. Is desirable. Of course, other synthetic resins such as polyethylene may be used.

  Here, the fitting protrusion 24 and the positioning protrusion 26 provided on the head main body 12 are arranged so that the direction of the straight extension line 11 connecting the both is in the direction of the cap main bodies 18-1, 18-2 of the dustproof caps 16-1, 16-2. Is set to be in a direction that does not hinder the water spraying deviated from the water discharging direction from the head water discharging units 14-1 and 14-2 when the water is released by water spraying from the head water discharging units 14-1 and 14-2.

  Furthermore, in this embodiment, the dustproof caps 16-1 and 16-2 are fixed to the fitting protrusion 24 and the positioning protrusion 26 of the head body 12 by fitting the band fixing portions 22-1 and 22-2. After forming the twisted portion 38 by twisting the band portions 20-1 and 20-2 once, the cap main bodies 18-1 and 18-2 at the tip are attached to the head water discharge portions 14-1 and 14-2. ing.

  By providing the twisted portion 38 in the band portions 20-1 and 20-2, the return from the watering direction when the cap main bodies 18-1 and 18-2 are detached can be facilitated by the recovery action of the twist. In the mounted state, rattling of the band fixing parts 22-1 and 22-2 with respect to the fitting protrusion 24 and the positioning protrusion 26 is suppressed by twisting by the twisting part 38, and further, the parts of the band fixing parts 22-1 and 22-2 The appearance is improved by putting together.

  If necessary, the cap main bodies 18-1 and 18-2 can be attached to the head without twisting the band portions 20-1 and 20-2 after being fixed by fitting the band fixing portions 22-1 and 22-2. You may mount | wear with the water discharge parts 14-1 and 14-2.

  FIG. 2 is an explanatory view showing the head main body 12 taken out in the present embodiment. 2A is a front view, FIG. 2B is a right side view, and FIG. 2C is a rear view.

  In FIG. 2A, a fitting protrusion 24 is provided on the lower side of the head main body 12, and a positioning protrusion 26 is disposed adjacent thereto. The hole portion of the band fixing portion 22-1 is fitted to the fitting protrusion 24 and the positioning protrusion 26. The fitting protrusion 24 is formed with a large-diameter retaining portion 24b following the projecting shaft portion 24a, and the opening portion 24b of the band fixing portion 22-1 is widened and pushed into the projecting shaft portion 24a. To prevent it from coming off.

  Further, a water discharge part connection port 28-1 is formed in the upper part of the head body 12, and a water discharge part connection port 28-2 is also formed on the front side. Here, as shown in FIG. 2 (B), the water discharge part connection port 28-2 is disposed downward, for example, by about 10 ° with respect to the horizontal direction in the illustrated state.

  3A and 3B are explanatory views of the dust-proof cap in the present embodiment. FIG. 3A is a plan view, FIG. 3B is a cross-sectional view, and FIG. 3C is a side view.

  In FIG. 3, the dust-proof cap 16-1 forms a cap body 18-1 at one end, forms a band portion 20-1 following the cap body 18-1, and a band fixing portion on the opposite side of the band portion 20-1. 22-1 is integrally formed. A fitting hole 32 is opened in the band fixing portion 22-1. As shown in the cross-sectional view of FIG. 3C, this fitting hole is a tapered hole having a large diameter on the pushing side with respect to the head body and a small diameter on the upper side.

  Further, a slit 34 is opened in the direction of the band portion 20-1 with respect to the fitting hole 32, and stop holes 36 for preventing further cracks are formed at both ends of the slit 34. Since the slit 34 formed in the direction crossing the fitting hole 32 is smaller in diameter than the retaining portion 24b in the fitting projection 24 shown in FIG. 2A, the slit 34 is formed in the retaining portion 24b. A slit 34 is formed to widen the fitting hole 32 when being pushed.

  In the present embodiment, the slit 34 formed in the band fixing portion 22-1 also functions as a positioning hole for fitting the positioning projection 26 provided on the head body 12. Therefore, at the same time that the fitting protrusion 24 of the head main body is fitted into the fitting hole 32, the positioning protrusion 26 is positioned at the slit 34 on the rear side, and the direction of the extension line 11 connecting the fitting hole 32 and the slit 34. The band 22-1 is supported toward

  FIG. 4 is an explanatory view of the embodiment of FIG. 1 as viewed from the cap body 18-1. In this state, when pressurized fire-extinguishing water is supplied to the head main body 12 and water is sprayed from the head water discharge portions 14-1 and 14-2, the cap main bodies 18-1 and 18-2 are separated by water spraying, and the separation shown in FIG. It becomes a state.

  In FIG. 5, the cap main body 18-1 attached to the head water discharge unit 14-1 and the cap main body 18-2 attached to the head water discharge unit 14-2 are provided in the head main body 12. The band portions 20-1 and 20-2 return in the direction of the extension line connecting the fitting projection 24 and the positioning projection 26, and in either the water spray direction of the head water discharge portion 14-1 or the water spray direction of the head water discharge portion 14-2. In contrast, the disengagement position is sufficiently distant from the cap body 18-1, 18-2 after the disengagement.

  FIG. 6 shows another embodiment according to the present invention. In this embodiment, the head has a long water discharge portion. In FIG. 6A, a head water discharge portion 14 is mounted on the head body 12 in a downward direction orthogonal to the pipe connection port 30, and the head water discharge portion 14 includes a spiral nozzle guide and has a dimension in the axial direction. It is a long structure.

  A cap body 18 is attached corresponding to the head water discharge portion 14. The dust cap 16 has a band portion 20 formed integrally with the cap body 18, a band fixing portion 22 is formed on the opposite side of the band portion 20, and the band fixing portion 22 is positioned with the fitting protrusion 24 of the head body 12. The protrusion 26 is fitted and fixed.

  As in the present embodiment, even when the cap main body 18 has a long dimension according to the head water discharge portion 14, if the cap main body 18 is detached by the water spray pressure by supplying pressurized fire extinguishing water to the head main body 12, The cap main body 18 is separated upward by the band portion 20 and is held at a position sufficiently away from the water spraying direction of the head water discharging portion 14, so that watering failure can be reliably prevented.

  7A and 7B are explanatory views showing another embodiment of the dustproof cap used in the head dustproof structure of the present embodiment, in which FIG. 7A is a plan view and FIG. 7B is a side view.

  The embodiment of FIG. 7 is characterized in that a V-shaped band part 40 is provided as a band part for connecting the cap body 18 and the band fixing part 22. When the V-shaped band portion 40 receives a water spray pressure on the band fixing portion 22 and receives a pulling force in the scattering direction when the cap body 18 is scattered, the V-shaped band portion 40 spreads to the band fixing portion 22. The applied stress is reduced, and the band portion is reliably prevented from being cut by the force when the cap body 18 is scattered by the water spray pressure.

  In addition, when the V-shaped band portion 40 is twisted with respect to the band fixing portion 22 and attached to the head water discharge portion, the band portion is formed into a V shape, so that bending stress accompanying twisting is dispersed throughout the band, and the entire band is twisted. Directional stress occurs. For this reason, the bending wrinkle generated in the V-shaped band portion 40 in a state of wearing for a long period of time can be reduced, the entire length of the band portion can be shortened, and the rotational axis of the rotational force applied to the cap body 18 that is detached by watering is V-shaped. The band part 40 can be used as a rotating shaft in a plurality of directions, so that the cap body 18 can be easily and reliably detached from the head watering part.

  FIG. 8 is an explanatory view of an embodiment using a dustproof cap provided with the V-shaped band portion 40 of FIG. In FIG. 8, with respect to the fitting protrusion 24 and the positioning protrusion 26 of the head body 12, the band fixing part 22- of the dustproof caps 16-1, 16-2 provided with V-shaped band parts 40-1, 40-2. 1 and 2-2 are fitted in an overlapped state.

  After forming the twisted portion 38 by twisting the base portions of the V-shaped band portions 40-1 and 40-2 once after the band fixing portions 22-1 and 22-2, 18-2 are attached to the head water discharge portions 14-1 and 14-2, respectively.

  When comparing the case where the V-shaped band portions 40-1 and 40-2 shown in FIG. 8 are provided with the case where the straight band portions 20-1 and 20-2 shown in FIG. It can be seen that the band portions 40-1 and 40-2 can disperse the stress due to the twist of the band portion applied to the band portion, and the stress deformation in the state of wearing for a long time can be sufficiently suppressed.

  Further, when the cap bodies 18-1 and 18-2 are scattered from the head water discharge portions 14-1 and 14-2 by the supply of pressure water, the straight portions of the band portions 20-1 and 20-2 in FIG. Therefore, the band fixing portions 22-1 and 22-2 directly receive the force due to the separation of the cap bodies 18-1 and 18-2.

  On the other hand, in the case of FIG. 8, when the cap bodies 18-1 and 18-2 are scattered by the water sprayed from the head water discharge portions 14-1 and 14-2, the V-shaped band portions 40-1 and 40-2. The deformation of the V-shaped band portions 40-1 and 40-2 can sufficiently reduce the force applied to the band fixing portions 22-1 and 22-2 and reliably prevent the band from being cut. it can.

In addition, this invention is not limited to said embodiment, The appropriate deformation | transformation which does not impair the objective and advantage is included. In the present embodiment, the case where one or two head water discharge portions are provided in the head body is taken as an example. However, if necessary, three or more head water discharge portions are provided. In other words, dust caps corresponding to the number of head water discharge portions are attached in the same manner.

Explanatory drawing which showed embodiment of the head dust-proof structure by this invention Explanatory drawing showing the head body of FIG. Explanatory drawing of embodiment of the dustproof cap by this invention Explanatory drawing which looked at embodiment of FIG. 1 from another direction Explanatory drawing of the state where the cap body is removed and retracted Explanatory drawing which showed other embodiment of the head dust-proof structure by this invention. Explanatory drawing of other embodiment of the dustproof cap by this invention Explanatory drawing of embodiment using the dustproof cap of FIG. Illustration of a conventional dustproof cap attached to a water spray head for tunnels

Explanation of symbols

10: Head 12: Head main body 14, 14-1, 14-2: Head water discharge part 16, 16-1, 16-2: Dust-proof cap 18, 18-1, 18-2: Cap main body 20, 20-1, 20-2: Band part 22, 22-1, 22-2: Band fixing part 24: Fitting protrusion 24a: Projection shaft part 24b: Retaining part 26: Positioning protrusion 28-1, 28-2: Water discharge part connection port 30: Piping connection port 32: Fitting hole 34: Slit 36: Stop hole 40, 40-1, 40-2: V-shaped band part

Claims (8)

In the head dustproof structure in which a dustproof cap is detachably attached to the head water discharge part of the head arranged at the tip of the pipe,
The head is
A fitting protrusion for fixing the band protruding from the head body,
A positioning protrusion protruding in the vicinity of the fitting protrusion;
With
The dust cap is
A cap body attached to the head water discharge unit;
A band fixing portion fixed to the head body;
A band part that connects the cap body to one end and the band fixing part to the other end;
A fitting hole formed in the band fixing portion and fitted into the fitting protrusion of the head;
A positioning hole that is fitted to the positioning protrusion of the head and determines the arrangement direction of the band;
A dustproof structure of a head, wherein the head is integrally formed of a flexible material.
2. The head dustproof structure according to claim 1, wherein an extension direction of a straight line connecting the positioning protrusion and the fitting protrusion is a direction in which the cap main body separated by water spraying of the head water discharge portion is removed from the water spraying direction. A head dustproof structure, wherein the positioning projection is provided at a position.
The dust cap according to claim 1,
The fitting protrusion provided on the head body includes a protruding head portion followed by a retaining head portion,
The fitting hole of the dust cap is smaller in diameter than the retaining head, and the fitting hole can be expanded by forming a slit in a direction crossing the fitting hole, and the positioning hole is also used as the slit Dust-proof structure featuring the head.
2. The dustproof structure according to claim 1, wherein the band portion is bent in a V shape with respect to the longitudinal direction.
2. The dustproof cap according to claim 1, wherein when the dustproof head has at least two head water discharge parts, two sets of the dustproof caps corresponding to the head water discharge parts are fitted to the fitting holes of the respective band fixing parts and The cap body is fixed to each head water discharge portion in a state in which the band portions of the two dustproof caps are twisted together at least once in the fixed state. Head dust-proof structure characterized by wearing.
In the dustproof cap that is detachably attached to the head located at the tip of the pipe,
A cap body attached to the head water discharge part of the head;
A band fixing part fixed to the head body of the head;
A band part that connects the cap body to one end and the band fixing part to the other end;
A fitting hole formed in the band fixing portion and fitted into the fitting protrusion of the head;
A positioning hole that is fitted to the positioning protrusion of the head and determines the arrangement direction of the band;
A dust-proof cap characterized in that it is integrally formed of a flexible material.
7. The dust-proof cap according to claim 6, wherein a slit is formed in a direction across the fitting hole of the dust-proof cap so that the fitting hole can be expanded, and the positioning hole is also used as the slit. Dust-proof cap.
  7. The dustproof cap according to claim 6, wherein the band portion is bent in a V shape with respect to the longitudinal direction.

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