JP2576619Y2 - Operating tool for sprinkler head - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an operating tool which is used when a sprinkler head is screwed and mounted on a piping material arranged behind a ceiling. More specifically, a screwing connection portion for a piping material is provided at a base end in an axial direction. The formed sprinkler head is provided with a cylindrical main body that can be fitted from the distal end side in the axial direction, and a screw-in rotary operation force receiving member formed to protrude outward in the radial direction at the base end side of the sprinkler head. The present invention relates to an apparatus in which a rotation operating part which is engaged with a driven engagement part for use in a state where relative rotation is impossible in accordance with fitting of the main body part to a sprinkler head is integrally connected to the main body part.

[0002]

2. Description of the Related Art For example, as shown in an embodiment described later, a plurality of bars are juxtaposed and suspended and supported on a ceiling slab, and a specific two of them are formed at a small interval to form a slit between them. In a sprinkler fire extinguishing system of a building having a system ceiling in which a ceiling board or a lighting device is erected between bars facing each other at a large interval, a sprinkler head often faces under the ceiling through the slit, The operation tool to which the present invention is applied is used for connecting or disconnecting the sprinkler head to a piping material arranged in the space above the ceiling or for replacement, including such a case. And, in the sprinkler head, generally, a portion on the proximal end side of the sprinkler head is formed in a hexagon inscribed in the outer peripheral surface of the sprinkler head like a bolt head or a nut when viewed in the axial direction, so that the outer peripheral surface is formed. The driven engaging portion is formed from each of the six corners projecting outward in the radial direction. As an operating tool for screwing such a sprinkler head into and out of the piping material, using the technology of general tools, the main unit has a wrench-shaped rotary operating unit similar to a box wrench for bolts and nuts. Are known in a series. However, when using the above conventional technology
Has a circular outer shape when viewed in the axial direction and an inner shape when viewed in the axial direction.
Is a wrench-shaped that fits and engages the hexagonal driven engagement part.
Since the rotary operation part was formed in a cylindrical shape,
The outer shape is the outer shape of the driven engagement part of the sprinkler head.
It was larger by its thickness than the shape. Toes
When the size is as small as possible, the rotation
Had a large diameter. As a result, for example,
The sprinkler fire extinguishing system on the ceiling
However, there are the following disadvantages. That is, the system
Before installing the ceiling, place the sprinkler head in the space above the ceiling.
There is no problem if it can be connected to the installed piping material, but
The sprinkler head after the ceiling
It is often necessary to screw connection to the piping material between
There are many. In such a case, remove the ceiling board and lighting equipment.
Making sprinkler head connection is very work
It is not easy to remove the ceiling board and lighting
Insert the wrinkler head and operating tool into the slit from under the ceiling
Through and connect the sprinkler head to the piping material
Is desired. However, the slit is
The sprinkler head so that the
Although it is configured with a width that can be inserted, the spring
Operation with a rotary operation unit that is larger in diameter than the Clarhead
Not necessarily wide enough to allow the
Today, it is important to improve the design of the ceiling looking up.
Lits tend to be as narrow as possible. Therefore,
When according to the prior art, spray after the ceiling construction as described above
If you need to connect a wrinkler head,
The slit that makes the sprinkler head face under the ceiling
To ensure the construction and operation of the sprinkler head
Only extra headroom to the sprinkler head dimensions.
With the sprinkler head under the ceiling
If the body is formed to the minimum width,
Make the diameter as small as possible, as long as it fits into the sprinkler head
By configuring it, its thickness is greater than that of the sprinkler head.
Only slightly larger, you can insert the slit
However, the larger rotary operation part can be inserted
Not work, poor workability of removing ceiling boards and lighting equipment
In many cases, work styles had to be adopted. Ma
In addition, the shape of the driven engagement portion is a flange shape, and
The cuts for fitting the projections of the
When targeting sprinkler heads
No. 47-91459 (Jpn.
No. 9), as described in the microfilm,
A projection formed on the distal end with a projection that fits into the break in the dynamic engagement section
A rotating operation unit, and a main body formed to have the same diameter as the rotating operation unit.
An operating tool is formed of a cylindrical member made of
If the protrusions can be fitted into the cuts,
The outer diameter of the rolling operation part / main body part is the maximum diameter of the driven engagement part.
The slit width is smaller than the sprinkler
-The head is set to the minimum width that can be inserted from under the ceiling.
Even if it is, it can be attached and detached from below.

[0003]

[Problems to be solved by the invention ]
In the case of the prior art, the thickness of the rotary operation part (especially the protrusion)
If it is larger, the outer diameter is larger than the slit width.
And the insertion operation cannot be performed.
The upper limit of the thickness dimension of is smaller than the outer diameter dimension of the driven engagement portion
It is necessary to set to the value, the rotation operation part becomes thin,
Tighten the sprinkler head with sufficient torque
However, there is a disadvantage that the tightening becomes difficult and insufficient tightening is likely to occur.
An object of the present invention, the connection of the sprinkler head employs a good form of workability, when it is possible to perform disengagement co
Another object of the present invention is to provide an operating tool capable of applying a sufficient rotational torque .

[0004]

A feature of the operating tool for a sprinkler head according to the present invention is that the rotary operating section is provided with a front end.
A large-diameter portion having a diameter larger than the outer dimensions of the main body portion;
And a small diameter portion having a diameter equal to or smaller than the diameter .

[0005]

For example, as shown in an embodiment described later, when the main body of the operating tool for which the driven engaging portion is a hexagonal sprinkler head is configured to have a diameter that allows a slit having a minimum width to be inserted, the conventional operating tool cannot be used. However, the rotation operation part protrudes outward in the radial direction from the main body part in the entire circumference and cannot be inserted through the slit, but in the operation tool of the present invention, the rotation operation part is the rotation of the main body part. Larger diameter than external dimensions
A large diameter portion and a diameter smaller than or equal to the diameter of the main body portion.
And a small-diameter portion.
It can be inserted along the slit width and inserted through the slit
It works. That is, a slit having a width that allows the main body to be inserted can be inserted into the slit regardless of the presence of the rotary operation unit. In addition, the large-diameter portion is made thick.
Of the sprinkler head.
The required torque can be applied during the attachment / detachment operation
Mechanical strength can be ensured at the large diameter portion.
And apply sufficient rotational torque to the sprinkler head.
Screw firmly or securely fastened
It is possible to remove the sprinkler head
You.

[0006]

Therefore, according to the present invention, even if the slit for allowing the sprinkler head to face under the ceiling is formed to a minimum width, the rotation operation for the sprinkler head is performed from under the ceiling through the slit. While applying sufficient torque to the rotation operation.
An operation tool for a sprinkler head which can be implemented in a real manner can be provided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a system ceiling has a plurality of bars B juxtaposed and suspended and supported by a ceiling slab (not shown). A ceiling board C and a lighting fixture D are erected between bars B arranged close to each other so as to form a slit S and opposed to each other at a large interval. The sprinkler fire extinguishing system is configured such that the sprinkler head 1 is disposed so as to face below the ceiling through the slit S, and a sprinkler pipe for supplying water to the sprinkler head 1 is arranged in a space above the ceiling. The sprinkler head 1 is provided with a screw connection portion 1a to a pipe material at a base end in an axial direction.
Is formed on the head main body 1A formed with the above, a driven engaging portion 1b for receiving a screw-in rotational operation force is formed, and a movable portion 1B which is operated to protrude by a heat sensitivity higher than a set temperature is assembled so as to protrude from the tip. ing. The head main body 1A has a circular outer shape when viewed in the axial direction, and the driven engagement portion 1b is formed on the base end side of the head main body 1A so as to circumscribe the outer peripheral surface of the head main body 1A. The outer shape when viewed in the axial direction is constituted by each corner of a hexagonal portion. That is, the driven engagement portion 1b projects radially outward. The movable part 1B has a deflector, a heat collector, a fuse pull metal and the like assembled. In short, the sprinkler head 1 has a known structure. The sprinkler pipe is configured by branch-connecting an unwinding pipe A (an example of the pipe material) having the lower end connected to the sprinkler head 1 to a distribution pipe E arranged in a horizontal posture. The slit S is formed to have a minimum width enough to allow the sprinkler head 1 to pass therethrough. An operating tool L for rotating the sprinkler head 1 is, as shown in FIGS.
A ratchet wrench, comprising a lever LB having a ratchet therein, and a socket portion detachably mounted on the lever LB. The socket portion is provided on a cylindrical main body portion 2 which can be fitted to the sprinkler head 1 from the tip side. As the main body 2 is fitted to the sprinkler head 1, the driven engagement portion 1
The rotary operation unit 3 that engages with the relative rotation-prohibited state is integrally provided with the rotary operation unit b. The main body 2 is provided at its end opposite to the rotary operation part 3 with a mounting part 2a which can be attached to and detached from the mounting shaft F of the lever LB. The rotation operating unit 3, before
The small diameter portion 20 having the same diameter La as the diameter Lb of the main body portion 2
And a large-diameter portion 21 having a diameter larger than the outer diameter of the main body 2.
It is provided with . Specifically, the large-diameter portion 21
Is a partial arcuate portion provided in each of the locations diametrically opposed orthogonal to the set diameter direction, the outer peripheral surface is formed in a circular arc surface, the inner circumferential surface, said Hidogakarigo Driven part 1 in a plurality of rotation positions with respect to part 1b
A plurality of engaging recesses 3a are formed on a wave surface in which the plurality of engaging recesses 3a are juxtaposed so as to engage with b. The small diameter portion 20 is formed in a shape obtained by cutting two diametrically opposed portions of a dodecagonal socket of a socket wrench. 4 is a cover elastically fitted to the sprinkler head 1. According to the above-described configuration, even when the outer diameter of the large diameter portion 21 is larger than the width Ls of the slit S, the operating tool L is set in the posture in which the small diameter portion 20 is aligned with the width direction of the slit S. Can be inserted.

[0008] In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a main part of a system ceiling.

FIG. 2 is a longitudinal sectional front view showing a use state.

FIG. 3 is a cross-sectional plan view showing a use state.

[Explanation of symbols]

A Piping material 1a Threaded connection part 1 Sprinkler head 2 Main body part 1b Driven engagement part 3 Rotation operation part 20 Small diameter part 21 Large diameter part

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsuhiko Horiuchi 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Takenaka Corporation Inside the Osaka main store (72) Inventor Shiro Kaneda Nakatsu, Kita-ku, Osaka-shi, Osaka 6-8-4 Nishihara Sanitary Industry Co., Ltd., Osaka store (72) Inventor Kazuo Abe 23, Senjuhashido-cho, Adachi-ku, Tokyo Inside Senju Sprinkler Co., Ltd. (56) References Real Opening 49-48899 (JP) , U) (58) Field surveyed (Int. Cl. ⁶ , DB name) A62C 35/68

Claims (1)

(57) [Scope of request for utility model registration] 1. A tubular main body which can be fitted from the distal end side in the axial direction to a sprinkler head (1) having a threaded connection portion (1a) to a pipe member (A) formed at a base end in the axial direction. The main body part (2) is provided on a driven engagement part (1b) for receiving a screwing rotation operation force formed in a state protruding radially outward from a base end side of the sprinkler head (1). ) Is an operating tool for a sprinkler head which is integrally connected to the main body (2) with a rotary operating portion (3) which engages with the sprinkler head (1) in a state where relative rotation is impossible. Te, the rotation operating portion (3), wherein the
A large-diameter portion (21) larger than the outer dimensions of the body (2);
The diameter of the main body part (2) or a smaller diameter part (2
0), an operating tool for a sprinkler head.