JP3157709B2 - Automatic fire extinguisher for cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire extinguisher in a cooking device such as a gas stove.

[0002]

2. Description of the Related Art In a heating cooker such as a gas stove, a temperature sensor detects a heating temperature of a food on a bottom surface of a pot and when a preset heating temperature is reached, a burner is automatically activated via a heating control means. The automatic fire extinguisher that extinguishes a fire has a structure in which a temperature sensor rises and lowers in conjunction with blinking operation means of a heating cooker, and also rises and falls in synchronization with a loading and unloading operation of a pot or the like.

Therefore, a conventional automatic fire extinguisher of this type is
For example, as shown in FIG.
A temperature measuring element (not shown) in which the temperature sensor 1 'is embedded is fixed at the distal end, and an operating pin for raising and lowering the temperature sensor 1' in conjunction with blinking operation means such as a gas stove is provided at the proximal end. A movable inner cylinder 6 'to which 12' is fixed, and a movable inner cylinder 6 'which is urged upward by a spring (not shown) to be inserted and supported so as to be vertically movable by a predetermined stroke, Slit-shaped guide groove 1 for guiding the operating pin 12 '
In the double-pipe structure having the fixed outer cylinder 7 'provided with the 3' and the movable inner cylinder 6 'at either the upper limit position or the lower limit position, the lead wire lead-out portion 4' at the base end thereof. Is immersed in the base end of the fixed outer cylinder 7 '.

[0004]

In the prior art, the temperature sensor 1 'moves up and down together with the movable inner cylinder 6' every time a gas stove or the like is used (flashing operation).
It can be moved up and down with a pan. Accordingly, the lead wire 5 'connected to the temperature sensor 1' is also moved up and down as the temperature sensor 1 'moves up and down, so that the lead wire 5' is rubbed each time with the base end surface 24 'of the fixed outer cylinder 7'. Being hurt.

If the lead wire 5 'is erroneously inserted into the slit-shaped guide groove 13' of the fixed outer cylinder 7 '(see a chain line in FIG. 6), it hinders the elevation of the temperature sensor 1'. In addition, the lead wire 5 'is strongly rubbed and damaged by the lead wire lead-out portion 4' of the movable inner cylinder 6 'and the guide groove 13'.

[0006] Therefore, there has been a problem that the harmful effect such as short-circuiting or disconnection of the coating of the lead wire 5 'finally occurs, coupled with the remarkable frequency of use.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention provides an automatic fire extinguishing method for a cooking device in which a means for protecting a lead wire is provided at a lead wire lead-out portion of a tubular body to prevent damage to the lead wire. The purpose is to provide equipment.

[0008]

In order to achieve the above-mentioned object, an automatic fire extinguisher of a heating cooker according to the present invention is provided, for example, as shown in FIGS. In an automatic fire extinguisher of a heating cooker for automatically extinguishing a burner via a heating control means when a temperature sensor 1 detects a heating temperature of an object at a pan bottom 2 and reaches a preset heating temperature, A temperature measuring element 14 in which a temperature sensor 1 is buried at a tip end of a cylindrical body B installed at a central portion is urged upward by a spring 3 so as to be movable up and down by a predetermined stroke, and the cylindrical body is provided. The main feature is that a lead portion 4 of a lead wire 5 connected to the temperature sensor 1 is provided at the base end of B, and a protection means D for preventing damage to the lead wire 5 is provided at the lead wire lead portion 4. I have.

Further, a cylindrical body B is provided with a movable inner cylinder 6 to which a temperature measuring element 14 in which the temperature sensor 1 is embedded at the tip is fixed, and the movable inner cylinder 6 is urged upward by the sprung 3 to maintain a constant temperature. It consists of a fixed outer cylinder 7 that is inserted and supported so that it can move up and down by the stroke,
As the lead wire protection means D for the tubular body B, the lead wire lead-out portion 4 at the base end of the movable inner cylinder 6 is lower than the base end of the fixed outer cylinder 7 even when the movable inner cylinder 6 is at the upper limit position. In addition to providing the protruding portion 8 exposed to the outside, the protruding portion 8 of the lead wire lead-out portion 4 of the movable inner cylinder 6 is provided with an outwardly flared curved skirt 9.

Further, the cylindrical body B urges the temperature measuring element 14 having the temperature sensor 1 buried at the tip thereof upward with the sprung 3 so as to be vertically movable by a predetermined stroke.
An outer flared curved skirt portion 11 is provided as a lead wire protection means D of the tubular body B at the lead wire lead-out portion 4 at the base end of the fixed tubular body 10. .

[0011]

Since the automatic fire extinguisher of the cooking device according to the present invention is constructed as described above, the lead wire 5 moves up and down together with the raising and lowering operation of the temperature sensor 1, but the lead wire 5 is pulled out of the cylindrical body B. The protection means D provided on the portion 4 for preventing the damage does not damage the base end surface of the fixed outer cylinder 7 or the like.

More specifically, in the case of the cylindrical body B having a double pipe structure comprising the movable inner cylinder 6 and the fixed outer cylinder 7, the movable inner cylinder 6
The lead wire extraction portion 4 is exposed downward from the base end of the fixed outer cylinder 7 even when the movable inner cylinder 6 is at the upper limit position by the protruding portion 8, so that the lead wire 5 is connected to the temperature sensor 1 and the movable inner cylinder. Even if it moves up and down together with 6, the base end surface of the fixed outer cylinder 7 is not damaged by touching, and the end of the protruding portion 8 of the lead wire lead-out portion 4 is formed into an outwardly flared curved hem 9. Damage due to the end face of the lead wire lead-out portion 4 is also eliminated.

Further, a cylindrical body B composed of only the fixed cylindrical body 10
Since the end portion of the lead wire lead-out portion 4 of the fixed cylindrical body 10 is formed in the outwardly flared curved hem portion 11,
Even if the lead wire 5 moves up and down together with the temperature sensor 1, no damage is caused on the base end surface of the fixed cylindrical body 10.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an automatic fire extinguisher according to an embodiment of the present invention.

In the embodiment, an automatic fire extinguisher according to the present invention is applied to a gas stove. In the embodiments shown in FIGS. 1 and 2, reference numeral 1 denotes a temperature sensor, for example, a thermistor having a thermosensitive element sealed in a glass tube. The temperature measuring element 14 is embedded and fixed in the center of the surface side of the temperature measuring element 14 with an inorganic filler 15. The temperature measuring element 14 is cylindrically movable via an inner cylinder mounting cylinder 16 and a connecting short cylinder 17. It is attached and fixed to the tip of the inner cylinder 6.

Reference numeral 7 denotes a cylindrical fixed outer cylinder which urges the movable inner cylinder 6 upward with the sprung 3 and inserts and supports the movable inner cylinder 6 so as to be vertically movable by a predetermined stroke. The fixed outer cylinder 7 and the movable inner cylinder 6 Constitutes a cylindrical body B having a double pipe structure, and a guide cylinder 19 provided integrally with the temperature measuring body 14 is slidably fitted on the upper end enlarged-diameter guide portion 18 of the fixed outer cylinder 7 so as to be fixed outside. The movable inner cylinder 6 is attached to the cylinder 7 so that it can move up and down linearly.

The spring 3 has a spring receiver 18a provided at the base end of the upper-diameter enlarged guide portion 18 of the fixed outer cylinder 7 and a guide cylinder 19.
Of the temperature sensor 14 with the temperature sensor 1 embedded therein by applying a slight preload to the spring receiver 19a provided at the tip of the
Is always urged upward.

Reference numeral 20 denotes a cover which covers the upper part of the temperature measuring element 14 in which the temperature sensor 1 is buried. The cover 20 can be freely attached to and detached from the guide cylinder 19 by an engaging / disengaging portion 21.
Reference numeral 22 denotes a skirt-shaped cover integrally provided at the lower portion of the guide cylinder 19, and both covers 20, 22 are for preventing invasion of boiled juice and the like into the inside.

Reference numeral 4 denotes a lead wire lead-out portion provided at the lower end of the movable inner cylinder 6. The lead wire lead-out portion 4 has a protruding portion 8 which extends the lower end of the movable inner cylinder 6 as it is, and is a base end of the fixed outer cylinder 7. It is provided in a state where it is exposed downward even when the movable inner cylinder 6 is at the upper limit position.

Reference numeral 5 denotes a lead wire which is connected to the connection terminal of the temperature sensor 1 and is drawn through the movable inner cylinder 6 to the outside at its lower end opening, that is, from the lead wire drawing section 4.

Reference numeral 12 denotes an operating pin fixed to the base end of the movable inner cylinder 6, and both ends thereof are inserted into slit-shaped guide grooves 13 provided at the base end of the fixed outer cylinder 7 so as to project outside. ,
Although not shown, an operating knob of a gas stove and a tip of an operating lever that swings via an operating cam are associated with the protruding portion 12a. The lifting of the movable inner cylinder 6 by the force of the ridge 3 is lifted, and the upper surface of the temperature measuring element 14 at the tip end is placed on the pan bottom 2 via the cover 20 at the upper limit position. When the fire extinguishing operation is performed, the distal end of the operating lever moves downward, and the movable inner cylinder 6 is held down at a lower limit position where the movable inner cylinder 6 is pushed down against the ridge 3 by a certain stroke, and the temperature measuring element at the distal end is held. 14 is separated from the bottom 2 of the pot.

Reference numeral 23 denotes a stopper pin for regulating the upper limit position of the temperature sensor 1. The stopper pin 23 is inserted and fixed at the lower end of the movable inner cylinder 6 in a direction crossing the operating pin 12 by slightly projecting both ends thereof to the outside. The rising stroke of the movable inner cylinder 6 is restricted by engaging the lower end surface 24 of the outer cylinder 7.

In the above configuration, the movable inner cylinder 6 rises by a predetermined stroke during the ignition operation, and the temperature measuring element 14 at the tip end is moved.
When the upper surface of the movable inner cylinder 6 is at the upper limit position where the upper surface of the movable inner cylinder 6 is pressed against the bottom surface 2 of the pan,
In other words, since the lead wire 5 is still exposed downward by a certain dimension a, even if the lead wire 5 moves upward together with the movable inner cylinder 6, the lead wire 5 will not be damaged by touching the base end face 24 of the fixed outer cylinder 7 or the like ( (See the state of the solid line in FIG. 1 and FIG. 2).

Also, when the movable inner cylinder 6 descends by a predetermined stroke during the fire extinguishing operation, and the temperature measuring element 14 at the distal end moves away from the pan bottom 2 and moves to the lower limit position, the base end of the movable inner cylinder 6 is also moved. Since the protruding portion 8 of the lead wire lead-out portion 4 of the portion keeps the exposed state and moves further downward, even if the lead wire 5 moves downward together with the movable inner cylinder 6, it touches the base end face 24 of the fixed outer cylinder 7 and the like. There is no damage (see the state of the chain line in FIG. 1).

The embodiment shown in FIG. 3 is similar to the embodiment shown in FIGS. 1 and 2 except that the movable inner cylinder 6 in the tubular body B having the double pipe structure composed of the movable inner cylinder 6 and the fixed outer cylinder 7 is used. In the case where the protruding portion 8 which is exposed downward even when the movable inner cylinder 6 is at the upper limit position from the base end of the fixed outer cylinder 7 is provided in the lead wire lead-out portion 4 at the base end, An outwardly flared curved skirt 9 is provided at the lower end.

In this embodiment, the lead wire lead-out portion 4
Of the lead wire 5 is not damaged by the end of the lead wire lead-out portion 4, and the protrusion 8
In addition to the protection of the lead wire 5 by the above, the lead wire 5 is effectively protected.

The other constructions and operations are the same as those of the previous embodiment, and the same parts are denoted by the same reference numerals and description thereof will be omitted.

Next, the embodiment shown in FIGS.
However, the fixed body 10 provided with the temperature sensor 14 having the temperature sensor 1 buried at the distal end thereof upwardly urged by the spring 3 through the guide tube 19 so as to be able to move up and down by a fixed stroke.
And a flared outward flared portion 1 at the end of the lead wire lead-out portion 4 at the base end of the fixed cylindrical body 10.
The upper limit position of the temperature sensor 1 is regulated such that a stopper 19b at the lower end of the guide tube 19 engages with the lower end of the guide portion 18 of the fixed tube body 10.

In this embodiment, even if the lead wire 5 moves up and down together with the temperature sensor 1 by touching the pan 33 and touches the end of the lead wire lead-out part 4, the end is bent. 11, the lead wire 5 smoothly slides along the curved skirt portion 11 and is not damaged.

Other structures and operations are described in FIG.
The same parts as those of the embodiment of FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

The burner A is provided with an annular mixing chamber 26.
A burner head 29 having a large number of flame opening grooves 28 radially mounted on a burner main body 27 having a plurality of main flame openings 30 is provided on a peripheral edge thereof. The cylindrical body B described above is inserted into the central air hole 31 of A, and this is attached and fixed to the mounting plate 25. 32 is a gas stove's gotoku and 33 is a pot placed on the gotoku 32.

[0032]

According to the automatic fire extinguisher of the heating cooker of the present invention, the lead wire lead-out portion of the tubular body is provided with a protection means for preventing the lead wire from being damaged, so that the lead wire is prevented from being damaged. It is possible to eliminate the adverse effects such as accidental short-circuiting or disconnection of the wire coating.

As the protection means, when the cylindrical body has a double-tube structure of a movable inner cylinder and a fixed outer cylinder, the movable body is fixed to the lead-out portion of the movable inner cylinder even when the movable inner cylinder is at the upper limit position. In addition to providing a projection that is exposed below the base end of the outer cylinder,
An outward flare-shaped curved hem is provided at the end of the protruding portion, and an outer flared curved hem is provided at the end of the lead wire lead-out portion in the case of only the fixed cylindrical body, so that it is simple. The lead wire can be reliably protected under a simple structure.

[0034] Therefore, in this type of automatic fire extinguisher, the damage of the lead wire, which has been a problem in the past, can be eliminated, so that the safety and durability are improved, and the structure is very simple, so that the cost is reduced. Is also inexpensive and is advantageous in implementation.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing only an essential part of an embodiment of an automatic fire extinguishing apparatus for a cooking device according to the present invention.

FIG. 2 is an enlarged sectional view of only the sensor main body.

FIG. 3 is a side view of a sensor main body having a different structure of a lead wire lead-out portion.

FIG. 4 is a partially cut front view of only a main part of a different embodiment.

FIG. 5 is an enlarged sectional view of only the sensor main body.

FIG. 6 is a partially cutaway front view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature sensor 2 Pan bottom 3 Spiral B cylindrical body 4 Lead wire lead-out part 5 Lead wire D Protective means 6 Movable inner cylinder 7 Fixed outer cylinder 8 Projecting part 9 Curved hem 10 Fixed cylindrical body 11 Curved hem 14 Thermometer

Claims (4)

(57) [Claims] 1. A temperature sensor for detecting a heating temperature of a food.
Is installed at the center of the burner (A) in the automatic fire extinguisher of the heating cooker which automatically extinguishes the burner through the heating control means when the temperature reaches a preset heating temperature detected by the pan bottom (2). A temperature sensor (14) in which a temperature sensor (1) is embedded at the tip of the cylindrical body (B) is urged upward by a spring (3) so as to be movable up and down by a certain stroke,
Further, a lead portion (4) of a lead wire (5) connected to the temperature sensor (1) is provided at a base end of the tubular body (B), and the lead wire (4) is connected to the lead wire lead portion (4). 5) An automatic fire extinguisher for a cooking device, comprising a protection means (D) for preventing the damage of (5). 2. A movable inner cylinder (6) in which a cylindrical body (B) has a temperature sensor (14) in which a temperature sensor (1) is buried at a distal end thereof, and a movable inner cylinder (6) is formed. (3) a fixed outer cylinder (7) which is urged upward and inserted and supported so as to be able to move up and down by a fixed stroke, and as the lead wire protection means (D) for the cylindrical body (B), The protruding portion exposed below the base end of the fixed outer cylinder (7) even when the movable inner cylinder (6) is at the upper limit position in the lead wire lead-out portion (4) at the base end of the inner cylinder (6). The automatic fire extinguisher of claim 1, further comprising (8). 3. A lead wire lead-out part (4) of a movable inner cylinder (6).
3. The automatic fire extinguisher of a heating cooker according to claim 1, wherein an outwardly flared curved hem (9) is provided on the projection (8). 4. A tubular body (B) provided with a temperature sensor (14) having a temperature sensor (1) buried at the tip thereof upwardly urged by a spring (3) so as to be vertically movable by a predetermined stroke. The fixed cylindrical body (10) is provided only as a lead wire protecting means (D) for the cylindrical body (B), and is directed outward to the lead wire lead-out portion (4) at the base end of the fixed cylindrical body (10). 2. The automatic fire extinguisher according to claim 1, further comprising a flare-shaped curved skirt.