JPS5812313Y2 - Fire detector attachment/detachment device - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a device for attaching and detaching a fire detector.

Fire detectors that are generally installed on ceilings, etc. consist of a sensing head that houses the detector body, and a base.The base is fixed to the ceiling, etc., and the sensing head is detachable from the base. This allows only the sensing head to be easily removed for maintenance, inspection, replacement, etc.

However, when a fire detector is installed at a high place such as a ceiling surface, it is difficult to reach it directly, so various attachment/detachment devices having longer operating rods have been proposed and implemented.

This type of conventional attachment/detachment device includes a holder that accommodates a sensing head at one end of a long operating rod, and is operated by holding the other end of the operating rod.

Therefore, if the ceiling is high and a long operating rod is required, or if there is an obstacle below the installation location and the operation must be performed from diagonally downward, make sure that the position of the sensor mounted on the ceiling matches the holder. It was difficult, required skill to operate, and took a long time.

This invention is a fire detector attachment/detachment device that solves the above-mentioned problems, and allows the holder to be easily matched to the installation position of the fire detector.

The attaching/detaching device according to this invention will be explained in detail below based on the drawings. Fig. 1 is a longitudinal sectional view showing one embodiment of the attaching/detaching device according to this invention, and shows an operating rod B having an appropriate length.
and a vessel-shaped holder H which is attached to one end of this operating rod B at its bottom, houses the sensing head, and whose opening HO has an outer circumference approximately equal to the outer circumference of the fire detector, and this holder H. A protruding piece T for locking the sensing head is provided on the inner circumferential surface of the housing, and a spring member S for biasing the protruding piece T is opened at one end to form a large opening GD. The slope part GK becomes smaller, and the straight pipe part GT
and a guide member G whose other end is a small opening GS and is slidably connected to the outer periphery of the opening HO of the holder H, and a guide member G that is always pushed out in front of the opening HO of the holder H. It consists of a spring M that biases it.

FIGS. 2 and 3 show how the attachment/detachment device constructed as described above is used, and when the sensing head DH is fitted into the base DB attached to the ceiling C, the sensing head The DH is inserted into the holder H, and the opening O of the sensing head DH and the protruding piece T are engaged and locked.

Next, when this holder H is brought close to the base DB, the tip of the base DB enters into the large opening GD of the guide member G and comes into contact with the slope GK even if the mutual positions do not match.

In this state, when the holder H is pushed up with the operating rod B, the base DB and the guide member G move while sliding relative to each other, and the base DB and the straight pipe part GT of the guide member G coincide with each other in the lateral direction. Movement to stops.

When the holder H is further pushed up, the base DB is guided by the straight tube part GT of the guide member G and matches the upper end of the sensing head DH.

At this time, the leading end of the large opening GD of the guide member G comes into contact with the ceiling surface C, but since it retreats against the force of the spring M, this does not interfere with the series of operations described above.

If the base DB and sensing head DH match, operate the operating rod B.
Turn the terminals HT on the sensing head DH side to engage and fix the terminals BT on the base DB side.

If you pull the operating rod B in this state, the holder H will come off from the sensing head DH and the installation operation will be completed, but the above operation explanation seems to be a slow operation because it is explained step by step. In reality, it is a continuous series of operations and is completed within a very short time.

Also, when removing the sensing head DH from the base DB, attach the holder -H to the sensing head D on the ceiling C.
H, the tip of the sensing head DH enters the large opening GD of the guide member G even if the mutual positions do not match, and by pushing up the operating rod B, the sensing head DH
moves downward along the guide member G and is inserted into the holder H.

At this time as well, the guide member G retreats against the force of the spring M, so that the series of operations described above is not obstructed.

The sensing head DH inserted into the holder H has a protruding piece T.
, and is removed from the base DB by operating the operating rod B.

FIG. 4 is a longitudinal sectional view showing another embodiment of the attachment/detachment device according to this invention, in which the guide member G is installed on the operating rod B, and the other parts are as shown in FIG. 1. Same as the example.

That is, the straight tube part GT of the guide member G is extended to form a cup shape that closes at the bottom of the holder H, and the protruding member T is provided on the operating rod B by passing the operating rod B through the bottom thereof.
By intervening a spring N between it and B, it is possible to freely move forward and backward.

If the guide member G covers the entire holder H in this way, the holder H will be protected and assembly will be facilitated.

In the above embodiment, the protruding piece T is used as a method of locking the sensing head DH to the holder H, but this idea can also be implemented in attachment/detachment devices using other locking methods. Of course.

As described above, the attachment/detachment device of this invention allows the holder to be easily and quickly matched to the installation position of the fire detector without the need for a hot wire, making attachment/detachment work easier and useful during maintenance, inspection, and replacement. It is something.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view showing an embodiment of the fire detector attachment/detaching device according to this invention, Figures 2 and 3 are diagrams showing the usage state of the attachment/detachment device of Figure 1, and Figure 4 is the invention. FIG. 2 is a longitudinal cross-sectional view showing another embodiment of the fire detector attachment/detachment device according to the present invention, and the same parts are indicated by the same reference numerals throughout each figure. B... Operating rod, DH... Sensing head,
H: Holder, HO: Opening of holder, G: Guide member, GD: (dog) opening of guide member.

Claims (1)

[Scope of utility model registration request] In a fire detector attachment/detachment device comprising an operating rod and a container-shaped holder attached to the tip of the operating rod and housing the sensing head of the fire detector, the area around the opening of the holder into which the sensing head is inserted. A device for attaching and detaching a fire detector, characterized in that the front end is opened larger than the opening of the holder and a guide member in the form of a flap is provided so as to be movable forward and backward.