JPS6324545Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas leak alarm, and an object of the present invention is to make the main body and mounting base of the alarm device impossible to remove without tools.

Generally, a gas leak alarm consists of a main body that houses a gas detection element, a detection circuit element, etc., and a mounting base into which the main body is fitted and connected in order to connect the gas detection element etc. to a power source. .

However, in the past, the main body of the gas leak alarm was designed to be able to be removably inserted into the mounting base without using any tools, so anyone could easily remove the main body from the mounting base. For this reason, there are problems in the handling of gas leak alarms, especially those with centralized monitoring installed in underground malls, hospitals, condominiums, etc. If the main unit is removed from the mounting base, a false alarm will be issued. An undesirable problem occurs in the system.

For this reason, recently, in order for a gas leak alarm to be certified as an excellent housing component, the main body of the alarm must be such that it cannot be removed from the mounting base without tools.

The present invention was developed in view of these circumstances, and focused on the fact that the main body of a gas leak alarm device is generally equipped with a plurality of parallel slits that form vents on the circumferential side thereof. The main body is then fixed to the mounting base using a fixing fitting via screw means. This fixture has a structure with a plurality of parallel hooks that are hooked onto the aforementioned vent forming slits in the gas leak alarm body, so the screw means can be loosened using a tool such as a screwdriver. The main body cannot be removed from the mounting base unless the fixing metal fittings are removed.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a state in which the main body 1 of the central monitoring type gas leak alarm is removed from the mounting base 2. As shown in FIG.

The fitting connection between the main body 1 and the mounting base 2 is as follows.
As is well known in the art, this is done by fitting a pair of power connection blades 3a, 3b provided on the back of the main body 1 into a pair of power supply insertion slits 4a, 4b provided in the mounting base 2, respectively, and rotating and hooking them. At the same time, a pair of signal line external terminals 5 of the main body 1 are connected.
a and 5b are also fitted and guided into corresponding insertion slits 6a and 6b of the mounting base 2, respectively.

Note that the power connection blades 3a and 3b have insertion slits 4.
These slits 4 are hooked on a and 4b.
Contact with the power terminals installed in a and 4b,
In addition, the signal line external terminals 5a and 5b also come into contact with the signal terminals installed in the insertion slits 6a and 6b, but such a fitting connection structure between the main body 1 and the mounting base 2 is different from the present invention. Since it is not directly related to the gist of , and is well known, a detailed explanation thereof will be omitted.

Further, as described above, the gas leak alarm main body 1 has a plurality of vent holes formed on its circumferential side, for example, seven
It has two parallel slits 7, 7a to 7g, and this slit portion is commonly called "garari".
Although this slit for forming a ventilation hole is not shown,
It is also formed on the front side of the main body.

Therefore, the gas leak alarm main body 1 having such a configuration has a fixing fitting 8 as shown in FIGS. 2a to 2c.
is fixed to the mounting base 2 via screw means.

The fixing metal fitting 8 has a plurality of, for example, five parallel hooking claws 9, 9a to 9e at one end thereof, and
The other end has a screw-fitting notch 10. The five hooking claws 9, 9a to 9e of this fixture 8 are
As shown in FIGS. 3 and 4, five of the vent forming slits 7 on the peripheral side of the gas leak alarm main body 1
It is hooked on the two slits 7b to 7f. Also,
The screw 11 passes through the notch 10 of the fixture 8 and is fitted into a hole 12 formed on the peripheral side of the mounting base 2 and a hole 14 formed in a protrusion 13 protruding into the hollow interior of the mounting base 2. hole 1 in 13
The nut 16 is inserted into the nut storage opening 15 formed perpendicularly to the mounting base 4 from the rear side of the mounting base. In this installed state of the fixing metal fitting 8, the hooking claws 9, 9a to 9c are hooked to the vent forming slits 7, 7b to 7f of the gas leak alarm main body 1, so that the main body 1 can be It cannot be rotated and cannot be removed from the mounting base 2.

By fixing the gas leak alarm main body 1 to the mounting base 2 via the screws 11 using such a fixing fitting 8, in order to remove the main body 1 from the mounting base 2, first tighten the screws 11 with a tool such as a screwdriver. It is necessary to loosen and remove the fixing fitting 8 from the mounting base 2 using a tool, and therefore the gas leak alarm main body 1 cannot be removed without tools.

Although one embodiment of the present invention has been described above with reference to the drawings, the present invention is by no means limited to this specific embodiment. For example, the number of hooks 9 on the fixture 8 may be equal to the number of vent forming slits 7 in the gas leak alarm main body 1, and the fixing structure of the fixture 8 to the mounting base 2 by screws 11 may be Other suitable structures may be used. Furthermore, an external terminal 5 for a signal line connected to the central monitoring board
Of course, the present invention can also be applied to gas leak alarms that do not have the slits 6a, 5b and the insertion slits 6a, 6b.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a gas leak alarm with the main body and mounting base separated, and Fig. 2a is a plan view showing an example of a fixing fitting used to fix the gas leak alarm main body to the mounting base. Fig. 2b is a front view of the device, Fig. 2c is a side view thereof, Fig. 3 is a view showing the main body of the gas leak alarm fixed to the mounting base with a fixing bracket, and Fig. 4 is a diagram showing the installation of this fixing bracket. It is a diagram showing the state in cross section. 1...Gas leak alarm body, 2...Mounting base, 7, 7a to 7g...Slit for forming vent hole,
8...Fixing metal fittings, 9, 9a-9e...Hooking claws, 1
0...notch, 11...screw, 16...nut.

Claims (1)

[Scope of utility model registration request] A fixing bracket having a plurality of parallel hooks hooked to some or all of the slits is attached to a gas leak alarm main body having a plurality of parallel slits forming a vent on the circumferential side, and this fixing bracket A gas leak alarm, characterized in that the main body is fixed to a mounting base into which the main body is fitted and connected by screw means.