JP2001157722A - Protective cap for sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective cap for a sprinkler head, which is so firmly secured to the head body of the protective cap as not to be easily removed by vibration or contact and yet can be easily removed therefrom with a small force when necessary. SOLUTION: In the protective cap 10 freely detachably installed on a sunken type sprinkler head which has a heat-sensitive operation section 6 on the head body 1, an engagement means free to engage and disengage is provided on the interior periphery of the upper part of the protective cap 10 formed into a cylinder form with a bottom and on the exterior periphery of the head body 1 corresponding to the interior periphery. The engagement means comprises a claw portion 11 and a groove portion 7. On the interior periphery of the protective cap 10, namely a lower part of the engagement means, there is provided a contact portion 12 which contacts the exterior periphery 8 of the head body 1 when the protective cap 10 is installed on the head body 1 with some inclination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cap for an embedded sprinkler head which is mounted on a sprinkler head to protect a deflector and a heat sensitive plate.

[0002]

2. Description of the Related Art Conventionally, in a sprinkler head as a fire extinguishing device, a heat-sensitive plate having a function of opening and closing a valve is a very important part in function, and when an external force such as an impact is applied to the heat-sensitive plate, water leakage or explosion occurs. It may cause accidents such as accidents. Therefore, conventionally, when the sprinkler system is installed, a protective cap is attached to the sprinkler head so that the sprinkler head is not damaged by any impact. And when installing this sprinkler head in a building etc.,
The head body is mounted on the ceiling surface in advance, and the ceiling surface is painted while the heat-sensitive plate is exposed.This work may inadvertently cause the heat-sensitive plate to be impacted, or the paint from the painting work may be sprayed and stained. There is. In addition, the heat-sensitive plate is often impacted by careless handling such as dropping or applying a tool during transportation or installation on piping. For this reason, after manufacturing the sprinkler head, a protective cap is attached to the sprinkler head to prevent the occurrence of the various accidents described above.

An example of a sprinkler head equipped with such a protective cap is shown in FIG.
There is an invention disclosed in JP-A-52077. The present invention has a head main body 80 of a sprinkler head having a plurality of steps 81 on an outer peripheral portion, and a claw section 91 for locking the steps 81 on an upper portion, and is detachably attached to the head body 80. At the time of shipment, the protective cap 90 is attached to a sprinkler head to protect a heat-sensitive plate and the like. Then, in this state, the sprinkler head is inserted into the mounting hole 21 provided in the ceiling 20 of the mounting site, and the screw portion 82 is screwed into the water supply pipe 22 disposed behind the ceiling to be connected.

[0004]

The above-mentioned protective cap 90 is removed from the head main body 80 when the painting work of the ceiling 20 is completed. However, the protective cap 90 is provided with a claw portion 91 and a plurality of step portions 81.
Since the protective cap 90 is pulled out from the head main body 80, a large force is required. Moreover, in order to pull out the protective cap 90 downward, even if the protective cap 90 is tilted so as to be twisted, the claw portion 91 does not come off at once by a plurality of steps, and even if one of the claw portions comes off, the opposing claw portion 91 is pulled out. There is a disadvantage that one of the claws 91 which has been detached when disengaged again meshes with the stepped portion 81 and cannot be easily disengaged, requiring a great deal of labor for detachment work.

Further, as another example of the sprinkler head in which the above-mentioned problem is solved and the protective cap is easily detached, there is an invention disclosed in Japanese Patent Application Laid-Open No. 8-755. According to the present invention, the outer diameter of the sealing cap and the inner diameter of the protective cap are formed to be substantially the same diameter, the protective cap is formed of synthetic resin, and the protective cap is protected by frictional force by press-fitting the protective cap into the sealing cap. The cap is detachably attached to the sealing cap. As described above, since the protective cap was attached to the sealing cap by the frictional force, it could be easily removed, but according to this configuration, vibration during transportation of the product, contact during construction, etc. Has caused a new problem of being easily detached.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the protective cap is firmly attached to the head body so that the protective cap does not come off easily due to vibration or contact. It is an object of the present invention to provide a sprinkler head protection cap that can be easily removed from the head main body with a small force after completion.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned object, a sprinkler head cap according to the present invention is constructed as follows. In a protective cap detachably attached to an embedded type sprinkler head having a heat-sensitive operating portion and the like in a head main body, the protective cap corresponding to an upper inner peripheral portion of the protective cap formed in a bottomed cylindrical shape and the inner peripheral portion. A detachable locking means is provided on an outer peripheral portion of the head main body, and the protective cap is inclined with respect to the head main body at an inner peripheral portion of the protection cap and below the locking means. It is characterized in that a contact portion is provided which comes into contact with the outer peripheral portion of the head main body when the state is reached.

According to the first aspect of the present invention, the locking means comprises a claw provided on an inner peripheral portion of the protective cap and a groove or a step provided on an outer peripheral portion of the head body. It is characterized in that the groove portion or the step portion is detachably engaged.

According to the first aspect of the present invention, the locking means comprises a concave portion provided on an inner peripheral portion of the protective cap and a claw portion provided on an outer peripheral portion of the head body. It is characterized by being detachably locked.

According to the first to third aspects of the present invention, the contact portion provided on the inner peripheral portion of the protective cap is slightly separated from the outer peripheral portion of the head main body when the locking means is in the locked state. It is characterized in that it is formed by a step portion or a protrusion portion.

[0011] In the second aspect of the present invention, the cylindrical protective cap comprises a small-diameter portion whose lower end is smaller in diameter than the upper portion, and a large-diameter portion above the lower portion. By fitting the portion into the small-diameter portion, it becomes possible to polymerize, and a concave portion is provided on the outer peripheral portion of the small-diameter portion so that the claw portion provided on the inner peripheral portion of the large-diameter portion is removably engaged. The feature is.

According to the third aspect of the present invention, the cylindrical protective cap comprises a small-diameter portion having a lower end portion having a smaller diameter than the upper portion and a large-diameter portion above the lower portion. The protrusion is made to be freely overlapped by fitting the portion to the small-diameter portion, and a projection is provided on the outer periphery of the small-diameter portion so as to be removably engaged with the recess provided on the inner periphery of the large-diameter portion. The feature is.

[0013]

FIG. 1 is an exploded view of a first embodiment of the present invention, partly in section, and FIG. 2 is a partial sectional view showing a state in which a protective cap is attached to a head body. These figures 1,
2, a head main body 1 constituting a sprinkler head has a thread portion 2 having a water passage at a central portion and screwed to a water supply pipe.
And a flange portion 3 provided below the screw portion 2;
It is composed of a cylindrical frame 4 provided on the lower surface of the flange portion 3, and cut grooves 5, 5 with which the attachment / detachment tool engages at equal intervals are provided on the outer periphery of the flange portion 3.

A frame 4 provided on the lower surface of the flange portion 3 of the head body 1 is provided by being screwed to the lower surface of the flange portion 3, and a fusible alloy is provided in the hollow portion of the cylindrical frame 4. It has a link mechanism and a part of a deflector that are disassembled and detached from the hollow part when the temperature exceeds a predetermined temperature, and a heat-sensitive operating part 6 made of a heat-sensitive plate or the like is attached to the lower end of the frame 4. ing. A bottomed cylindrical protective cap 10 molded from a synthetic resin material is removably attached to the sprinkler head having the heat-sensitive operating portion 6 and the like in the head body 1 described above.

Protective cap 1 molded in a cylindrical shape
0 is an example of a large-diameter portion 1 having an upper half cylindrical shape.
0a and a small-diameter portion 10b formed in a cylindrical shape with a bottom below.
It consists of: The large diameter portion 10a is formed to have a height sufficient to cover the height from the lower surface to the lower end of the flange portion 3 of the head body 1, that is, the height of the frame 4 in consideration of the height of the frame 4. In addition, the height of the small-diameter portion 10 b is formed to be lower than the lower surface of the heat-sensitive operating unit 6. Large diameter portion 10a of the protective cap 10
Is formed slightly larger than the outer diameter of the frame 4 of the head body 1, and therefore, the protective cap 10
Is attached to the head body 1 with a small gap 1 between them.
9 occurs. The above protective cap 1
0 can be formed with the same diameter as a whole without comprising the large diameter portion 10a and the small diameter portion 10b.

The upper inner peripheral portion of the protective cap 10 and the outer peripheral portion of the head body 1 (that is, the frame 4 in the embodiment) corresponding to the inner peripheral portion are provided with detachable locking means. In the first embodiment shown in FIGS. 1 and 2, the locking means is a claw 1 provided on the inner peripheral portion of the protective cap 10.
1 and a groove 7 provided on the outer peripheral portion of the head main body 1. The protective cap 10 is detachably attached to the head main body 1 by engaging and disengaging the claw 11 and the groove 7. It is. The claw 11 is formed in the groove 7 through the space 19 between the protective cap 10 and the head body 1.
Is formed at a height reaching the height. As an example, a plurality of the claw portions 11 provided on the inner peripheral portion of the protective cap 10 are scattered in the same circumferential portion, while the groove portions 7 provided on the outer peripheral portion of the head main body 1 have the outer peripheral portion. The parts are continuously formed.

Further, on the inner peripheral portion of the protective cap 10 and below the locking means, the head body 1
The space 19 is maintained and the protective cap 1
0 is provided on the head main body 1 with a contact portion 12 which comes into contact with the outer peripheral portion of the head main body 1 when the mounting state is inclined as described later. That is, the contact portion 12 provided on the inner peripheral portion of the protective cap 10 is slightly separated from the outer peripheral portion of the head main body 1 when the locking means is in the locked state as shown in FIGS. It is formed in the step part which consists of. Then, as shown in FIG. 3, when the protective cap 10 is pulled out from the head main body 1, when the protective cap 10 is in an inclined mounting state with respect to the head main body 1,
The head body 1 is configured to come into contact with a corner portion 8 which is an outer peripheral portion. In addition, when the protective cap 10 is attached to and detached from the head main body 1, the locking and unlocking of the claw 11 of the protective cap 10 and the groove 7 of the head main body 1 can be easily performed. Claw part 1 of upper opening
Notches 15 are provided at both ends of 1 so that the vicinity of the claw portion 11 is curved. Further, a step 16 is provided below the contact portion 12 provided on the inner periphery of the protection cap 10, and when the protection cap 10 is attached to the head body 1, the step 16 is moved to the lower end 8 of the outer periphery of the head body 1. Protective cap 1
0 is inserted farther than specified so as not to give a shock to the heat-sensitive operation unit 6.

On the other hand, in the second embodiment shown in FIG. 7, the locking means comprises a concave portion 11a provided on the inner peripheral portion of the protective cap 10 and a claw portion provided on the outer peripheral portion of the head body 1. 7
The protection cap 10 is removably attached to the sprinkler head by the concave portion 11a and the claw portion 7a being detachably engaged with each other. The basic configuration of the second embodiment is the same as that of the first embodiment. Therefore, common parts are indicated by the same reference numerals. The bottom wall of the protective cap 10 has a drain hole 1
4, 14 are provided. In addition, a level display unit for displaying a mounting position on the ceiling 20 can be provided on an outer wall of the protective cap 10.

Next, as shown in FIG.
A concave portion 13 is provided in the outer peripheral portion of Ob to engage with the claw portion 11 provided on the inner peripheral portion of the large-diameter portion 10a so as to be freely engaged and disengaged. The outer diameter of the small diameter portion 10b is substantially the same as the inner diameter of the large diameter portion 10a with the claw portion 11. Then, as described above, the cylindrical protective cap 10 has a small-diameter portion 10b whose lower end portion is smaller in diameter than the upper portion and a large-diameter portion 1.
As shown in FIG. 6, the protective caps 10 and 10 are connected to each other with a large diameter portion 10a and a small diameter portion 10a.
b makes it superimposable by fitting, and
Since the claw portion 11 provided on the inner peripheral portion of the large diameter portion 10a is engaged with the concave portion 13 on the outer peripheral portion of the small diameter portion 10b in a detachable manner, they are engaged with each other to ensure the polymerization state. So that it can be maintained. Further, the protective caps 10, 1
By polymerizing 0, there is an advantage that it is suitable for carrying and reduces the storage space. In the second embodiment shown in FIG. 7, the protrusion which engages with the concave portion 11a provided on the inner peripheral portion of the large-diameter portion 10a with the outer peripheral portion of the small-diameter portion 10b is detachable. The protective caps 10 and 10 in the second embodiment are provided with a portion 13a.
In this case, the projection 13a is engaged with the recess 11a.

In order to mount the protective cap 10 configured as described above on the head main body 1, first, in the state shown in FIG. 1, the cap main body 10 is inserted into the sprinkler head from below and strongly pushed up. Then, a claw portion 11 is provided on the inner peripheral portion of the protective cap 10 as locking means, and the groove portion 7 is formed on the outer peripheral portion of the head main body 1. Lock it,
The protective cap 10 is held on the head body 1 in a semi-fixed state. At this time, the upper end of the protective cap 10 is located slightly below the lower surface of the flange 3.

Next, the operation of the present invention will be described with reference to FIGS. FIG. 2 shows a state at the time of shipment, and a protective cap 10 is attached to the sprinkler head.
The thermal operation part 6 is covered and protected.

The sprinkler head transported to the installation site in this state is, as shown in FIG.
The upper part is inserted into the mounting hole 21 provided in the water supply pipe 22, and the tool is engaged with the cut groove 5 of the flange part 3 to connect the screw part 2 to the water supply pipe 22.
And connected. After the sprinkler head is connected to the water supply pipe 22, water is supplied from the water supply pipe 22 to the sprinkler head. If there is water leakage in the sprinkler head, the leaked water is discharged from the drain hole 14 of the protective cap 10. Therefore, water leakage can be confirmed from the outside.

In this state, the ceiling plate 20 is painted. At this time, the paint may adhere to the outer periphery of the protective cap 10 and stain the protective cap 10. When the painting of the ceiling plate 20 is finished, as shown in FIG. 3, the user holds the protective cap 10 soiled with the paint with his thumb and forefinger and pulls it downward.
Alternatively, if the finger is pinched and pulled downward, the protective cap 10 is detached from the head main body 1, so that no paint stain remains on the sprinkler head. In this case, the protective cap 10
Is held by a special locking means with the head body 1, so that the holding cap 10 can be removed from the head body 1 with a small force, as described below.

Next, the head body 1 of the protective cap 10 will be described.
2 to 4 show the procedure for releasing the lock from the cable and removing the lock.
A description will be given based on a and b. First, from the state shown in FIGS. 2 and 4a, when the outer peripheral portion of the protective cap 10 is picked up by hand and pulled diagonally downward, the protective cap 10 is tilted obliquely with the claw portion 11 on the pulled side as a fulcrum, and is pulled in the opposite direction. Side claw part 1
1 comes out of the groove 7 of the head main body 1, and at this time, as shown in FIGS. 3 and 4 b, the projection 8 which is the outer peripheral portion of the head main body 1 comes into contact with the contact part 12 in the protective cap 10. Then, when the protective cap 10 is pulled in the opposite direction to the above, the protrusion 8
-Since the protective cap 10 is rotated and pulled downward with the contact portion 12 as a fulcrum, the remaining claw portions 11 in the locked state are held.
And the groove 7 can be very easily released with a weak force, and the protective cap 10 can be removed from the head body 1.

FIG. 8 shows a third embodiment of a sprinkler head to which a protective cap according to the present invention is attached, in which a frame 4 of a head main body 1 is connected to an upper portion having a small outer peripheral width and a lower portion having a large outer peripheral width. And a step portion 7a between them.
Is provided. The claw portion 11 provided on the inner peripheral portion of the protective cap 10 is hooked and locked by the step portion 7a. Also in this configuration, the protective cap 10 can be easily removed by the above-described two downward operations. The parts common to the first embodiment are denoted by the same reference numerals.

In the above description, the case where the present invention is applied to a sprinkler head as shown in the drawings is shown. However, the present invention can be applied to a sprinkler head having another structure. It can also be implemented in a structure where a sealing cap is attached to the head body.
The present invention is not limited to this example, and can be appropriately changed. Further, the shape of the protective cap is not limited to a cylindrical shape, but can be appropriately changed to a polygonal shape or the like according to the shape of the sprinkler head. Further, even when a large number of claw portions 11 of the protection cap 10 are provided, since the protection cap 10 is molded from a synthetic resin material,
When 1 comes off, the outer diameter is slightly deformed, and the other claw portions 11 become easy to come off, and can be easily removed by two lowering operations as described above. The claw 11 may be provided at the uppermost end of the upper opening of the protective cap 10.

[0027]

As is apparent from the above description, the present invention is capable of engaging and disengaging the upper inner peripheral portion of the protective cap detachably mounted on the sprinkler head and the outer peripheral portion of the head main body corresponding to the inner peripheral portion. Abutment means for contacting the outer peripheral portion of the head main body when the protective cap is in a state of being inclined with respect to the head main body at an inner peripheral portion thereof and below the above-mentioned engaging means. Since the protective cap is attached to the head body firmly by the above-mentioned locking means, it does not come off easily by vibration or contact, and after the ceiling painting work is completed, Since the contact portion of the protective cap contacts the outer peripheral portion of the head main body in combination with the locking means and serves as a lever, there is an effect that the protective cap can be easily removed from the head main body with a small force. . Moreover, since the ceiling is painted with the protective cap attached to the head body and the protective cap that has been soiled with paint is removed after painting, the paint adheres to the exposed parts of the head body, such as the heat-sensitive operating parts, when painting the ceiling. In addition to the above, it is possible to reliably avoid damage to these by construction members.

Since the cylindrical protective cap is composed of a small-diameter portion and a large-diameter portion, the protective caps can be made superimposable by fitting the large-diameter portion to the small-diameter portion, thereby facilitating portability. This has the effect that the storage space can be reduced. Furthermore, since the claw or recess provided on the inner periphery of the large-diameter portion is provided on the outer periphery of the small-diameter portion with a recess or claw that is removably engaged, these are engaged with each other. This has the effect of reliably maintaining the polymerization state.

[Brief description of the drawings]

FIG. 1 is an exploded view of a first embodiment of the present invention.

FIG. 2 is a partial sectional view showing an assembled state of FIG.

FIG. 3 is an operation explanatory view of FIG. 2;

FIG. 4 is an explanatory diagram of an enlarged operation of a main part of FIGS.

FIG. 5 is a partially broken bottom view of the protective cap.

FIG. 6 is a partial cross-sectional view showing a polymerization state of a protective cap.

FIG. 7 is an explanatory diagram of a second embodiment.

FIG. 8 is an explanatory diagram of a third embodiment.

FIG. 9 is a partial sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head main body 2 Screw part 3 Flange part 4 Frame 5 Cutting groove 6 Heat-sensitive operation part 7 Groove part 8 Protrusion part 10 Protective cap 10a Large diameter part 10b Small diameter part 11 Claw part 12 Contact part 13 Concave part 14 Drain hole 15 Notch 16 steps Part 19 Air gap 20 Ceiling board 21 Mounting hole 22 Water supply pipe

Claims (6)

[Claims] 1. A protective cap detachably mounted on an embedded sprinkler head having a heat-sensitive operating portion and the like in a head body, wherein an upper inner peripheral portion of a protective cap formed into a bottomed cylindrical shape and an inner peripheral portion thereof are provided. A detachable locking means is provided on an outer peripheral portion of the head body corresponding to the peripheral portion, and the protective cap is provided on an inner peripheral portion of the protective cap and below the locking means. A protection cap for a sprinkler head, wherein a contact portion is provided for contacting an outer peripheral portion of a head main body when the mounting state is inclined. 2. The locking means comprises a claw provided on an inner periphery of the protective cap and a groove or a step provided on an outer periphery of the head body, and the claw is engaged with the groove or the step. 2. The protective cap for a sprinkler head according to claim 1, wherein the cap is freely locked. 3. The locking means comprises a concave portion provided on an inner peripheral portion of the protective cap and a claw portion provided on an outer peripheral portion of the head main body, and the concave portion and the claw portion are removably locked. The protective cap for a sprinkler head according to claim 1, wherein: 4. A contact portion provided on an inner peripheral portion of the protective cap is formed by a step or a protrusion slightly separated from an outer peripheral portion of the head body when the locking means is in a locked state. 4. The protective cap of a sprinkler head according to claim 1, wherein the protective cap is formed. 5. The cylindrical protective cap comprises a small-diameter portion whose lower end is smaller in diameter than the upper portion and a large-diameter portion above the lower portion, and the protective caps are fitted with the large-diameter portion to the small-diameter portion. 3. The method according to claim 2, wherein the outer peripheral portion of the small-diameter portion is provided with a concave portion in which the claw portion provided on the inner peripheral portion of the large-diameter portion is detachably engaged.
A protective cap for a sprinkler head according to item 1. 6. The cylindrical protective cap comprises a small-diameter portion whose lower end is smaller in diameter than the upper portion and a large-diameter portion above the lower portion, and the protective caps are fitted with the large-diameter portion to the small-diameter portion. 4. A projection which is made free to be polymerized by doing so and is provided on the outer peripheral portion of the small diameter portion so as to be removably engaged with the concave portion provided on the inner peripheral portion of the large diameter portion.
A protective cap for a sprinkler head according to item 1.