JPH0325265Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a detachable device for a fire detector that is detachably installed via a base fixed to a ceiling.

Fire detectors are normally installed in a removable manner via a base fixed to the ceiling, but because they are located at a high location, they require a detachable device to be attached or detached during inspection or in the event of a false alarm. Various attachment/detachment devices have been proposed in the past, and a main body that accommodates a fire detector to be attached and detached is attached to the tip of a support rod for attachment/detachment operation, and a protrusion or recess provided on the main body and a recess for the fire detector are attached. Alternatively, there are devices that can be attached and detached by engaging the protrusions and transmitting the rotation of the support rod to the fire detector by friction between the friction member such as rubber provided on the main body and the fire detector. As is known, fire detectors vary in shape and size depending on the type of fire detector, and for this reason, various detachable devices are currently manufactured individually depending on the type of fire detector. be. Therefore, when multiple types of fire detectors are installed, separate attachment/detachment devices suitable for each fire detector must be prepared, which is not only uneconomical, but also makes work difficult if the wrong attachment/detachment device is prepared. There were drawbacks, such as the possibility that it would not work.

Therefore, the present invention enables the attachment and detachment of various fire detectors of different shapes and sizes using the same attachment/detachment device. 1 is the support rod for attachment/detachment operation, 2 is the support rod 1
3 is a cylindrical body that slides up and down on the outer surface of the cylindrical body 2, which houses a fire detector that can be attached and detached between the cylindrical body 2 and the cylindrical body 3. 4 is formed. The vessel body 2 is provided with a plurality of friction members 5 extending radially from the bottom surface to the upper edge through the inner surface thereof, and the cylinder body 3 is provided with an annular friction member 5 having a plurality of tongues inside on the upper edge thereof. A friction member 6 is provided. Further, a movable protrusion 7 is provided on the outside of the vessel body 2 so as to constantly protrude from the side surface of the vessel body 2 due to the repulsive force of a spring 8.
This movable protrusion 7 can be retracted into the container body 2 by operating a lever 9 whose one end is supported. A plurality of holes 10 are bored in the side surface of the cylinder 3, and the movable protrusion 7 is engaged with one of them depending on the type of fire detector to be attached or detached. Note that 11 is a cut to avoid a confirmation light provided depending on the type of fire detector.

The present invention is constructed as described above, and when attaching or detaching the fire detector, first move the free end of the lever 9 toward the support rod 1 against the repulsive force of the spring 8, and move the movable protrusion 7 to the vessel body. The depth of the main body 4 is adjusted by retracting it inside and sliding the cylindrical body 3 up and down, and engaging the movable protrusion 7 with the hole 10 corresponding to the fire detector to be attached/detached. As shown in FIGS. 3 to 6, examples of how the movable protrusion 7 and the hole 10 engage in different engagement positions are shown in FIGS.
When the removable fire detector 12 is placed inside, one or both of the friction members 5 and 6 of the container body 2 and the cylinder body 3 are appropriately combined to come into close contact with the fire detector 12, and the support rod 1 is rotated. The fire detector 12 also rotates due to the friction with the friction members 5 and 6, and the base 14 is fixed to the ceiling 13.
It can be attached to or removed from the base 14. That is, in FIG. 3, due to the friction between the friction member 5 of the vessel body 2 and the entire surface of the fire detector 12, in FIG. 5, by the friction between the friction member 6 and the upper part of the fire detector 12, and in FIG. 6, by the friction between the friction member 6, especially the tongue piece. They are attached and detached by friction with the side surface of the fire detector 12, respectively. Note that the tongue piece of the friction member 6 deforms itself freely when it acts in close contact with the fire detector, so it is highly adaptable to changes in the shape and size of the fire detector. In addition, in the above embodiment, the vessel body 2
The movable protrusion 7 is provided in the cylindrical body 3, and the hole 10 is made in the cylindrical body 3, but it may be reversed.Furthermore, although the friction members 5 and 6 are respectively made radial and annular, the present invention is not limited thereto. Other suitable shapes may also be used.

As described above, according to the present invention, the main body housing the detachable fire detector is composed of the vessel body each provided with a friction member and the cylindrical body sliding up and down on the outer surface of the body, and the body housing the detachable fire detector By adjusting the depth of the main body by sliding the cylindrical body according to the shape and size of the detector, one or both of the above-mentioned friction members are appropriately combined and brought into close contact with the fire detector. Therefore, various fire detectors of different shapes and sizes can be attached and detached using the same attachment/detachment device.
It has excellent effects such as being economical and easy to work with.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, FIG. 2 is a plan view thereof, and FIGS. 3 to 6 show cases in which the engagement positions of the movable protrusion 7 and the hole 10 are different, respectively. It is a longitudinal cross-sectional view showing each example of a usage form. 1...Support rod, 2...Vessel body, 3...Cylinder body, 4...
...Main body, 5, 6...Friction member, 7...Movable protrusion,
10...hole, 12...fire detector.

Claims (1)

[Claims for Utility Model Registration] 1. A main body housing a removable fire detector is attached to the tip of a support rod for attaching/detaching operation, and the fire detector can be attached/detached by friction with a friction member provided on the main body. In the detachable device, the main body is
It consists of a vessel body each provided with a friction member and a cylinder body that slides up and down on the outer surface of the vessel body, and a mechanism that adjusts the depth of the body by sliding the cylinder body, and the mechanism Therefore, by adjusting the depth of the main body, one or both of the friction members of the vessel body and the cylindrical body are combined as appropriate depending on the shape and size of the fire detector to be attached or detached, and are brought into close contact with the fire detector. A detachable device for a fire detector characterized by the following features. 2 The mechanism that adjusts the depth of the main body by sliding the cylinder consists of a movable protrusion that constantly protrudes due to the repulsive force of a spring provided on one side of the vessel and the cylinder, and a hole in the cylinder that is formed on the other side. A fire detector attachment/detachment device according to claim 1, which comprises a plurality of holes that are slidably engaged with the movable protrusion. 3. The attachment/detachment device for a fire detector according to claim 1 or 2, wherein the friction member provided on the cylindrical body has a plurality of tongues inside thereof.