JPH0241738Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a fire detector.

(Prior Art) Thermal type fire detectors, so-called heat detectors, that detect a temperature rise due to the occurrence of a fire are equipped with a heat-sensitive actuator that performs a switching operation when the ambient temperature reaches a predetermined set temperature.

Conventional fire detectors have an insertion hole in the detector body into which the heat-sensitive actuator is inserted, and the heat-sensitive actuator is inserted into the insertion hole and temporarily fixed in place with adhesive, and after the temporary fixation is completed. Furthermore, adhesive was filled from the ceiling mounting side of the sensor body to secure it in place.

(Problems that the invention aims to solve) However, with such conventional fire detectors, not only do they require two work steps, temporary fixing and final fixing, but also the adhesive solidifies. There was a problem in that the work efficiency of the assembly work was extremely low because it took a long time, for example, 12 hours.

Furthermore, in the final fixing operation, a large amount of adhesive is filled, which may cause the adhesive to flow out to the heat-sensitive side of the heat-sensitive actuator, which is the side opposite to the ceiling mounting surface. When the spilled adhesive adheres to the heat-sensitive part of the heat-sensitive actuator, the heat in the heat-sensitive part is radiated by the adhering adhesive, resulting in a significant decrease in the heat-sensing effect and a problem of poor sensitivity of the heat sensor.

(Means for Solving the Problem) The present invention has been made in view of the above-mentioned problems, and does not require the use of adhesive when attaching the heat-sensitive actuating body to the main body of the sensor, allowing for reliable and easy installation. In order to provide the sensor, an L-shaped locking part is provided on the heat-sensitive actuating body, a guide part is provided in the insertion hole of the sensor body to guide the locking part, and the heat-sensitive actuating body is provided with a guide part that guides the locking part. The pressing fixing part that fixes the conductive terminal of the heat-sensitive actuating body in a pressed state by inserting and turning the body is formed by bending the terminal of the sensor body into an L-shape.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is an overall view, partially in section, of an embodiment of the present invention.

First, to explain the configuration, 1 is the sensor body of the heat sensor. 2 is a heat-sensitive actuator, which includes a heat-sensitive plate 3;
It is composed of locking parts 4a, 4b, conductive terminals 5a, 5b, and an internally built-in switching means, and when the temperature sensitive from the heat sensitive plate 3 reaches a predetermined temperature or higher,
One conductive terminal 5a, which drives the switching means.
Short-circuit between 5b. The distance between the pair of conductive terminals 5a and 5b is set to a predetermined distance d. Further, a pair of L-shaped locking portions 4a and 4b (not shown) are provided on the side surface of the heat-sensitive actuating body 2. The heat sensitive device main body 1 is provided with an insertion hole 6 into which the heat sensitive actuator 2 is inserted, and a pair of guide portions 7a and 7b are provided at the lower side of the insertion hole 6 at positions corresponding to the pair of locking portions 4a and 4b, respectively. are provided in a protruding manner to guide the corresponding locking portions 4a and 4b. 8a and 8b
are terminals, which are fixed with screws 9a and 9b, respectively. Reference numerals 10a and 10b are pressure fixing parts, and the ends thereof are bent into an L-shape using the same material as the terminals 8a and 8b, respectively. The distance D between the press fixing parts 10a and 10b
Is it equal to the distance d between the conduction terminals 5a and 5b?
or is set lower than that.

FIG. 2 is an explanatory diagram showing the installation state shown in FIG. 1 in a plan view.

The attachment of the heat-sensitive actuator 2 to the sensor main body 1 will be explained with reference to FIG. First, the heat-sensitive actuator 2 is inserted into the insertion hole 6 of the sensor body 1. At this time, a pair of locking parts 4a and 4b, which are recessed in an L-shape on the side surface of the heat-sensitive actuating body 2, are guided by guide parts 7a and 7b, which are provided in protrusions at corresponding positions, respectively. Here, as shown in FIG. 2, the heat-sensitive actuator 2 is rotated in the direction of the arrow. The distance D between the pressing fixing parts 10a and 10b is equal to the distance between the conduction terminal 5a of the heat-sensitive actuating body 2.
By setting the distance to be equal to or less than the distance d between the conductive terminals 5a and 5b, the pair of conductive terminals 5a and 5b are fixed in a pressed state by rotating the heat-sensitive actuating body 2.

In this embodiment, the locking parts 4a and 4b are
The guide portions 7a, 7b are provided in a concave manner, and the locking portions 4a, 4b are provided in a protruding manner.
7b may be an L-shaped recess.

Fig. 3 is a partial sectional view showing another embodiment of the present invention, Fig. 4 is an explanatory view showing the X-X cross section of the sensor main body in Fig. 3 rotated by 90 degrees, and Fig. 5 is an explanatory view showing another embodiment of the present invention. FIG. 5 is a bottom view of FIG. 4;

Another embodiment of the present invention will be described with reference to FIGS. 3 to 5.

Reference numeral 11 denotes a sensor main body of a composite fire detector incorporating a photoelectric smoke detection section and a heat detection section. 12 is a heat-sensitive actuator, which includes a heat-sensitive plate 13, conduction terminals 14a, 1
4b and a built-in switching means, and when the heat-sensitive temperature obtained through the heat-sensitive plate 13 reaches a predetermined temperature or higher, the switching means is operated to shorten the distance between the pair of conductive terminals 14a and 14b. The conduction terminals 14a and 14b are guided along a guide portion to be described later, and function as a locking portion that is locked into the sensor main body 11 by pressing the pressing and fixing portion. The heat-sensitive actuator mounting surface 15 on the lower side of the sensor main body 11 is provided with an insertion hole 16 into which the heat-sensitive actuator 12 is inserted, and guide portions 17a and 17b that guide conductive terminals 14a and 14b as locking portions. is provided. That is, the guide portions 17a and 17b are drilled to have the same shape as the conductive terminals 14a and 14b as the locking portions.
A pair of guide portions 17a inside the sensor body 11
A pair of corresponding pressing and fixing parts 18a and 18b are provided above 17b. The pair of press fixing parts 18a and 18b are formed of the same material as the sensor main body 11, and are bent so as to have downward elastic force. Reference numeral 19 denotes a dark box having a labyrinth structure, and a stopper 23 is provided extending directly downward from the top of the dark box 19 located at the center of the insertion hole 16. This stopper 23 is pressed by the heat-sensitive actuating body 12 onto the fixed portion 18.
By being inserted against the elastic force of a and 18b, the heat-sensitive actuating body 12 is stopped at a predetermined position, and the pair of pressing fixing parts 18a and 18b are prevented from being damaged. A pair of relay terminals 2 are provided on the outside of the dark box 19.
0a and 20b are provided. One end of each of the pair of relay terminals 20a and 20b is electrically connected to the corresponding continuity terminal 14a and 14b, and the pair of relay terminals 20a and 20b
The other end of each is connected to a screw 21a provided correspondingly.
and 21b, it is electrically connected to an external terminal (not shown).

FIG. 6 is an explanatory diagram showing the attachment of the heat-sensitive actuating body 12, taken along the line X--X in FIG. 3.

The installation of the embodiment of FIG. 3 will be explained with reference to FIG. As shown in FIG.
The heat-sensitive actuating body 12, which is bent so that a and 18b have one end facing downward, is inserted into the insertion hole 16. That is, as shown in FIG. 6B, the heat-sensitive actuating body 12
A pair of conduction terminals 14a and 14b as locking portions provided in the guide portions 17 provided correspondingly
a and 17b. In this state, the heat-sensitive actuating body 12 is rotated in a depressed state. That is, by pushing the heat-sensitive actuating body 12, the heat-sensitive actuating body 12 is rotated in the direction of the arrow while the press-fixing parts 18a and 18b are lifted against the elastic force of the pair of press-fixing parts 18a and 18b. let Heat sensitive actuator 1
2, a pair of conductive terminals 14a and 14b
are guided along guide plates 22a and 22b, and as shown in FIG. 6C, a pair of conductive terminals 14a and 14b are electrically connected to corresponding relay terminals 20a and 20b. Also,
The heat-sensitive actuating body 12 is fixed to the sensor main body 11 in a pressed state through a pair of press-fixing parts 18a and 18b. Note that 24a and 24b are stoppers.

(Effects of the invention) As explained above, according to the invention, the heat-sensitive actuator is provided with an L-shaped locking part, and the insertion hole of the sensor body is provided with a guide part for guiding the locking part. established,
Furthermore, a pressing fixing part is formed by bending the terminal of the sensor body into an L shape, which fixes the conductive terminal of the heat sensitive actuating body in a pressed state by inserting and rotating the heat sensitive actuating body through the guide part. When attaching the heat-sensitive actuator to the device main body, it can be attached reliably and easily without using adhesive. Also,
Since it can be installed without using adhesive, the efficiency of assembly work can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is an overall view showing a positional embodiment of the present invention with a partial cross section, Fig. 2 is an installation explanatory diagram showing the installation state of Fig. 1 in a plan view, and Fig. 3 is another embodiment of the present invention. A partial sectional view showing an example, FIG. 4 is an explanatory diagram showing the X-X cross section of the sensor body in FIG. 3 rotated by 90 degrees, FIG. 5 is a bottom view of FIG. 4, and FIG. 6 is the third
FIG. 3 is an explanatory diagram showing the attachment of the heat-sensitive actuating body according to a cross section taken along the line XX in the figure. 1, 11... Sensor body, 2, 12... Heat-sensitive actuating body, 3, 13... Heat-sensitive plate, 4a, 4b... Locking portion, 5a, 5b, 14, 14b... Continuity terminal,
6, 16...insertion hole, 7a, 7b, 17a, 17
b... Guide section, 8a, 8b, 20a, 20b...
Terminal, 9a, 9b, 21a, 21b...screw, 1
0a, 10b, 18a, 18b...pressing fixing part,
15...Heat-sensitive actuator mounting surface, 19...Dark box, 22
a, 22b...Guide plate, 23, 24a, 24b
...stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] A heat-sensitive actuating body incorporating a switching means that performs a switching operation when a predetermined set temperature is reached, and having a conduction terminal for transmitting the output of the switching means; A fire detector comprising a sensor body having a terminal that connects to the conduction terminal when the heat-sensitive actuator is inserted, wherein the heat-sensitive actuator is provided with an L-shaped locking part, and the sensor body The insertion hole is provided with a guide part that guides the locking part, and a pressing fixing part that fixes the conductive terminal of the heat-sensitive actuator in a pressed state by inserting and rotating the heat-sensitive actuator through the guide part. A fire detector characterized in that the terminal of the detector body is bent into an L shape.