JP2000249296A - Magnet type curve corresponding fixture of gas leakage warning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnet type curve corresponding fixture of a gas leakage warning device, which is capable of fitting a gas leakage warning device to a gas storage tank simply and surely. SOLUTION: This fixture is provided on a gas leakage warning device 8, and includes a fixture base 11 which can be deformed to meet corresponding to the shape of the fitting object position of a gas storage container, and a magnet 12 which is provided on the gas leakage warning device 8 and/or the fixture base to allow deformation of the fixture base 11, and exhibits magnetic attracting force to the fitting object position of the gas storage tank so that the fixture base 11 keeps the state of matching the fitting object position of the gas storage tank 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leak alarm device for mounting a gas leak alarm device on a gas storage container magnetized by an external magnetic field and exhibiting magnetism.

[0002]

2. Description of the Related Art In general, a gas storage container for storing a large amount of gas is formed of a material which is magnetized by an external magnetic field and exhibits magnetism.
There is widely known a mode having a valve mechanism for putting a gas into or out of the gas storage unit. The form (shape) of the gas storage unit depends on the environment, use, and the like. There is a wide variety. In addition, the said gas storage container may be called "bulk" commonly.

It is desirable that a gas leak alarm be attached to the gas storage container in order to detect a gas leak promptly and to take appropriate measures such as closing a failure point. In addition, since such a gas leak is highly likely to be caused by a failure of the valve mechanism of the gas storage container, it is desirable to mount the gas leak alarm on the gas storage container in the vicinity of the valve mechanism.

FIG. 5 shows a fixture for mounting a gas leak alarm on a wall near a valve mechanism of a gas storage container.
As shown in (a), a flat rigid magnet 51 is attached to the flat back surface of the gas leak alarm 8 with an adhesive or the like, and its magnetic attraction force causes the vicinity of the valve mechanism of the gas storage container 9 to be provided. As flat as possible the mounting target position (wall surface) 9
b (FIG. 5B), there is a mode (fixing tool 50) in which the gas leak alarm 8 is attached.

[0005]

However, the gas storage container 9 whose respective parts are formed in a cylindrical shape as shown in FIG.
In contrast to the conventional fixing device 50 described above,
In the case where the gas leak alarm 8 is mounted, the wall near the valve mechanism which is the mounting target position 9a for mounting the gas leak alarm 8 described above has an almost concave curved surface.

Therefore, as shown in FIG. 5 (c), in the gas storage container 9, between the mounting target position 9a curved into a concave curved shape near the valve mechanism of the gas leak alarm 8 and the rigid magnet 51 having a flat plate shape. Since a gap is generated, the magnetic attraction force of the rigid magnet 51 does not sufficiently reach the mounting target position 9a, so that it is extremely difficult to mount the rigid magnet 51. Even if it is mounted, it lacks stability and is not reliable as an alarm device. There was a fear that the property would be impaired.

In such a case, the flat rigid magnet 51 of the conventional fixture 50 may be formed to have a convex curved shape corresponding to the concave curved shape of the mounting position 9a. Although it is conceivable, a wide variety of rigid magnets must be manufactured according to the shape of the mounting target position in the vicinity of the valve mechanism of the gas storage container 9 in various forms (shapes). Did not.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to solve the above-mentioned drawbacks. It is an object of the present invention to provide a magnet type curved surface fixing device for a gas leak alarm that can easily and reliably attach the gas leak alarm to a gas storage container without limiting the gas leak detector.

[0009]

According to a first aspect of the present invention, there is provided a gas leakage alarm device having a magnet-type curved surface fixing fixture for mounting a gas leakage alarm device on a gas storage container magnetized by an external magnetic field and exhibiting magnetism. A magnet-type fixture for a curved surface of a gas leak alarm device, wherein the fixing device base is provided on the gas leak alarm device and can be deformed so as to conform to the shape of a mounting target position of the gas storage container. And a gas leak alarm and / or a fixture provided on the fixture base to allow deformation of the fixture base, exhibiting magnetic attraction to a mounting target position of the gas storage container, and And a magnet for maintaining the state in which the base matches the shape of the mounting target position of the gas storage container.

According to the first aspect of the present invention, the fixture base provided on the gas leak alarm has a shape (for example, a flat surface) at a position to which the gas storage container is to be mounted. Shape, concave curved shape, convex curved shape,
(A concave bent shape, a convex bent shape, etc.) and can be deformed so as to match, and the gas leak alarm and / or the magnet provided on the fixture base allow deformation of the fixture base. In addition, the magnetic attraction force is exerted on the mounting position of the gas storage container, and the state in which the fixture base matches the shape of the mounting position of the gas storage container can be maintained by the magnetic attraction force of the magnet. become. Therefore, the magnetic attraction force of the magnet is sufficiently exerted on the mounting target position of the gas storage container without generating a gap between the shape of the mounting target position of the gas storage container and the fixture base,
The gas leak alarm can be easily and reliably mounted to any shape of the mounting target position of the gas storage container, a predetermined stability is obtained, and the reliability as the alarm is not impaired.

According to a second aspect of the present invention, there is provided a gas leakage alarm device with a magnet corresponding to a curved surface according to the first aspect, wherein the fixing member base is provided with an external magnetic field. It is characterized by being made of a material that is magnetized to show magnetism.

According to the magnet type curved surface fixing device for a gas leak alarm according to the second aspect, a material (iron, cobalt, nickel, or an alloy containing at least one of these materials) which is magnetized by an external magnetic field and exhibits magnetism Etc.), the magnetic flux lines generated from the magnet are concentrated in the base, and the magnetic flux lines by the magnet and the magnetized magnetic flux lines by the fixture base are matched. As a result, the magnetic force on the gas leak alarm side is increased, and the magnetic attraction of the gas leak alarm on the gas storage container is strengthened. Therefore, the further enhanced magnetic attraction force of the magnet is exerted on the mounting position of the gas storage container, and the gas leak alarm is easily and more securely mounted on any shape of the mounting position of the gas storage container. The predetermined stability can be obtained, and the reliability as an alarm device is not impaired.

According to a third aspect of the present invention, there is provided the gas leakage alarm device according to the first or second aspect, wherein the fixture base comprises: It is characterized by having at least an annular peripheral wall portion, and providing a plurality of notched grooves on an opening peripheral edge of the annular peripheral wall portion.

According to the magnet-type curved surface fixing device of the gas leak alarm according to the third aspect, the fixing device base is deformed by the application of an external force and retains its current shape unless an external force is applied. In the case where the annular peripheral wall has a predetermined strength, it is possible to maintain a predetermined shape before and after the deformation by the annular peripheral wall, and a plurality of notches provided on the peripheral edge of the opening of the annular peripheral wall. The opening side of the annular peripheral wall provided with the cutout groove is easily expanded, and the annular peripheral wall can be bent so as to conform to the shape of the mounting target position. Therefore, even if the gas leak alarm is repeatedly attached to and detached from the gas storage container, the fixture base before and after the deformation can be maintained in a predetermined shape, and the magnetic attraction force of the magnet increases the mounting of the gas storage container. By exerting it to the target position, the gas leak alarm can be easily and securely mounted to any shape of the mounting position of the gas storage container, and the predetermined stability can be obtained. Reliability is not impaired.

In the case where the annular peripheral wall is magnetized by an external magnetic field as described in claim 2 to exhibit magnetism, the shape of the annular peripheral wall is shifted to the center thereof. The magnetic flux generated by the magnet is efficiently concentrated in the peripheral wall of the magnet, and the magnetic flux line by the magnet is aligned with the magnetic flux line by the magnetized fixture base. As a result, the magnetic force on the vessel side is increased, and the magnetic attraction of the gas leak alarm to the gas storage container is strengthened. Therefore,
The enhanced magnetic attraction of the magnet is exerted on the mounting position of the gas storage container, and the gas leak alarm can be easily and more securely mounted on any shape of the mounting position of the gas storage container. As a result, predetermined stability is obtained, and the reliability as an alarm is not impaired.

According to a third aspect of the present invention, the fixture base further includes a bottom portion so as to close one opening in the annular peripheral wall portion. It is good also as an aspect formed in a box shape.
This bottom portion functions as a reinforcing member of the peripheral wall portion, and is deformed by the application of external force, and has a certain degree of strength so as to maintain the current shape unless external force is applied. Accordingly, the predetermined shape before and after the deformation can be maintained, and the maintenance performance of the shape of the annular peripheral wall before and after the deformation can be improved.

According to a fourth aspect of the present invention, there is provided the gas leakage alarm device according to the first or second aspect, wherein the fixture base is curved. It is characterized by having a free seat portion.

According to the magnet type curved surface fixing device of the gas leak alarm according to the fourth aspect, the fixing device base can conform to any shape by the bendable sheet portion. Therefore, the magnetic attraction force of the magnet is sufficiently exerted on the mounting target position of the gas storage container without generating a gap between the shape of the mounting target position and the fixture base,
The gas leak alarm can be easily and reliably mounted to any shape of the mounting target position of the gas storage container, a predetermined stability is obtained, and the reliability as the alarm is not impaired.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIG. 1 (a) is a schematic perspective view showing an embodiment of the present invention, and FIG. 1 (b) is a schematic cross-sectional view of FIG. 1 (a).

The magnet-type curved surface fixing fixture 10 of the gas leak alarm shown in FIG. 1 is for attaching the gas leak alarm 8 to the gas storage container 9 which is magnetized by an external magnetic field and exhibits magnetism. It is provided on the back side surface of the gas leak alarm 8 and is deformed by the application of external force so as to conform to the shape of the mounting target position 9a of the gas storage container 9 and maintains its current shape unless external force is applied. The fixture base 11 is provided on the fixture base 11 so as to allow deformation of the fixture base 11, and is attached to the mounting target position 9 a of the gas storage container 9 via the fixture base 11. A magnet sheet 12 which indirectly exerts a magnetic attraction force and maintains a state in which the fixture base 11 conforms to the shape of the mounting target position 9a of the gas storage container 9.

The fixture base 11 is magnetized by an external magnetic field like the gas storage container 9 to exhibit magnetism, and has annular peripheral wall portions 11a and 11b and the annular peripheral wall portions 11a and 11b.
a, bottom 1 provided to close one opening of 11b
1c and the peripheral wall portion 11b provided with the bottom portion 11c.
And a fixing portion 11d fixed to the back side surface of the gas leak alarm 8 and formed in a box shape.
Here, the fixing body 11 is configured such that the fixing portion 11 d is fixed to the back side surface of the gas leak alarm 8 by the screw 13. In addition, as another mode of the fixture base 11, for example, a cross section along the curved direction of the attachment target surface 9a of the gas storage container 9 is formed in such a manner that a thick portion and a thin portion having an uneven shape are formed continuously. It is also possible to use an extremely thin metal plate and bend the portion of the thin portion so as to conform to the shape of the mounting target position of the gas storage container 9.

Further, an annular peripheral wall portion 11a, the symmetrical position of the peripheral wall portion 11a at one opening side of 11b, since a plurality of notch grooves 11a ₁ is provided, FIG. 1
When the fixture base 11 so as to conform to the shape of the curved mounting object located 9a on the concave curved surface shape of the gas reservoir 9 as shown in (b) is curved, the provided with a plurality of cutout grooves 11a ₁ The plurality of notched grooves 11 are formed along the curved direction in which the hard peripheral wall portion 11 a is curved into the concave curved surface shape of the gas storage container 9.
By expanding the opening side provided with a ₁ , the fixture base 11 is formed to be curved. Incidentally, the cutout groove 11a ₁ as described above, an annular peripheral wall portion 11a, 11b
May be provided over the entire periphery of one of the openings, or may be provided over the entire periphery of the other opening of the annular peripheral wall portions 11a and 11b. It is possible to be more effective.

Further, since the box-shaped fixture base 11 is formed of a material which is magnetized by an external magnetic field and exhibits magnetism as described above, the flux lines generated from the magnet sheet 12 are well passed and concentrated. The magnetic flux lines from the magnet sheet 12 and the magnetic flux lines from the fixture base 11 magnetized by the magnet sheet 12 are combined to increase the magnetic force on the fixture base 11 side. It serves to enhance the magnetic attraction of the gas leak alarm 8 to the mounting target position 9a of the gas storage container 9.

The magnet sheet 12 is provided in the bottom portion 11c of the fixture base 11 by its magnetic attraction force, and employs a sheet that can expand and contract so as to allow deformation of the fixture base 11. ing.

According to this embodiment, the mounting target position 9a of the gas storage container 9 curved into a concave curved surface and the annular peripheral wall portion 11 of the fixture base 11 provided with the magnet sheet 12 are provided.
a, 11b are matched with each other, and the magnetic attraction force of the magnet sheet 12 is fixed to the fixture base 1 without forming a gap between the mounting target position 9a of the gas storage container 9 and the fixture base 12.
1 so as to sufficiently reach the mounting target position 9a curved into a concave curved surface shape of the gas storage container 9 through the fixture base 1
Since it is possible to maintain a state in which the peripheral wall portions 11a and 11b of the first gasket 1 match the mounting position 9a of the gas storage container 9, the gas leak alarm 8 can be simplified with respect to the shape of the mounting position 9a of the gas storage container 9. And it can be attached securely.
The predetermined stability can be obtained, and the reliability as an alarm device is not impaired.

In this embodiment, the fixture base 11 is made up of annular peripheral walls 11a and 11b and a bottom 11c.
And the fixing portion 11d, and the magnet sheet 12 is provided on the bottom portion 11c. However, for example, when the gas leak alarm 8 is magnetized by an external magnetic field to show magnetism, it is not always necessary. It is also possible to adopt a mode in which the magnet sheet 12 is provided directly on the back surface of the gas leak alarm 8 by its magnetic attraction force without providing the bottom 11c. In this case, it is not always necessary to use the stretchable magnet sheet 12 as in the present embodiment, and it is also possible to use a rigid magnet.

In addition, when the above-mentioned magnet-type curved surface fixing fixture 10 of the gas leak alarm is mounted on the flat mounting target position 9b of the gas storage container 9 as shown in FIGS. 2 (a) and 2 (b). The fixing base 11 can be mounted simply by fixing it to the rear side of the gas leak alarm 8 in a flat state without bending the fixing base 11.

In the above-mentioned magnet type curved surface fixing fixture 10 of the gas leak alarm device, the case where the mounting position of the gas storage container is a concave curved surface shape and the case where the gas storage container is a flat shape has been described. When the shape of the target position is a convex curved surface or the like, the fixing portion 11d of the fixture base 11 is formed into a thick shape so as to function as a support base for the annular peripheral wall portions 11a and 11b and the bottom portion 11c. ,
A predetermined space may be secured between the positions of the annular peripheral wall portions 11a, 11b and the bottom portion 11c and the gas leak alarm 8.
According to this aspect, when the shape of the mounting target position of the gas storage container is a concave curved surface shape, and not only in the case of a planar shape,
Even when the mounting target position of the gas storage container is a convex curved shape or the like, the fixture base 11 can be made to match the shape.

Embodiment 2 FIG. 3 (a) is a schematic perspective view showing another embodiment of the present invention, and FIG. 3 (b) is a schematic cross-sectional view of FIG. 3 (a).

The magnet type curved surface fixing fixture 20 of the gas leak alarm shown in FIG. 3 is for attaching the gas leak alarm 8 to the gas storage container 9 which is magnetized by an external magnetic field and shows magnetism. A fixture base 2 that is provided on the back side of the gas leak alarm 8 and that can be flexibly deformed so as to correspond to the shape of the mounting target position 9 a of the gas storage container 9.
1 and a plurality of rods provided on the fixture base 21 so as to allow flexible deformation of the fixture base 21 and exerting a magnetic attraction force directly on the mounting target position 9a of the gas storage container 9. And a magnet 22.

The fixture base 21 is not affected by an external magnetic field, and is provided with a resin sheet portion 21a made of silicon, rubber, or the like, and is provided on both sides of the sheet portion 21a. And a soft fixing portion 11d that is fixed to the back side surface of the base member. Here, the fixture base 11 is
The soft fixing portion 21b is fixed to the gas leak alarm 8 by the screw 23.
It is designed to be fixed to the back side of the vehicle.

The seat portion 21a is flexibly curved so as to correspond to the mounting position 9a which is curved into a concave curved surface of the gas storage container 9 (FIG. 3B). .

The plurality of rod-shaped magnets 22 are embedded in the sheet portion 21a of the fixture base 21, and are arranged at predetermined intervals so as to allow the fixture base 11 to be flexibly deformed. ing. The plurality of rod-shaped magnets 22 embedded in the sheet portion 21 are merely covered with relatively thin films, respectively, so that the magnetic attraction force to the outside is sufficiently exhibited.

According to this embodiment, the mounting position 9a of the gas storage container 9 which is curved into a concave curved surface, and the sheet portion 21 provided with the plurality of rod-shaped magnets 22 of the fixture base 21 are provided.
a, and the magnetic attraction force of the plurality of rod-shaped magnets 22 is directly applied to the concave curved surface shape of the gas storage container 9 without forming a gap between the concave curved surface shape of the gas storage container 9 and the fixture base 12. The fixing member base 21 is configured to sufficiently extend to the mounting target position 9a, and the seat portion 21a of the fixture base 21 can be maintained in a state that matches the mounting target position 9a of the gas storage container 9. The gas leak alarm 8 can be easily and reliably mounted on the mounting target position 9a, a predetermined stability is obtained, and the reliability as the alarm is not impaired.

In this embodiment, the fixture base 21 is composed of a sheet portion 21a and a fixing portion 21b, and a plurality of rod-like magnets 22 are attached to the sheet portion 11a.
Are provided at predetermined intervals, but instead of the plurality of rod-shaped magnets 22, for example, a plurality of rectangular magnet pieces may be provided for each of the subdivided sections, or a mode in which a magnet sheet or the like is employed. By adopting such an aspect, it is possible to cope with any shape, which is more effective.

In the above-described magnet-type curved surface fixing fixture 20 of the gas leak alarm device, the seat portion 21a of the fixture base 21 can be flexibly deformed, and the seat portion 21a has a concave curved shape of the gas storage container 9. Mounting position 9 curved to
a, but also to a flat mounting target position 9b of the gas storage container 9.

Further, in the fixture base 21 of the magnet type curved surface fixing fixture 20 of the gas leak alarm device, a sheet portion 21a which can be flexibly deformed is employed. It is also possible to adopt a material such as plastic made to have a high strength, which is deformed by the application of an external force and which returns to its original shape when no external force is applied.

It should be noted that the fixture base can be flexibly deformed as described above, or deformed by the application of external force as described above,
If a fixture base that can be deformed so as to return to its original shape when no external force is applied is used, the arc storage portion 9a can be accurately positioned on the concave portion of the gas storage container 9 at the mounting target position 9a. It is desirable to set the degree of slack or flexure so as to correspond to the above, and secure a stable mounting function of the gas leak alarm 9.

In the magnet type curved surface fixing fixture 20 of the gas leak alarm described above, the case where the mounting position of the gas storage container is a concave curved surface shape and a planar shape is described. In a case where the shape of the mounting target position of the gas storage container is a convex curved surface or the like, the fixing portion 21b of the fixture base 21 is formed in a thick shape so as to function as a support for the sheet portion 21a. A predetermined space may be secured between the position of the seat portion 21a and the gas leak alarm 8. According to this aspect, not only in the case where the shape of the mounting target position of the gas storage container is a concave curved surface shape and in the case of a flat shape, but also in the case where the shape of the mounting target position of the gas storage container 8 is a convex curved surface shape or the like. The fixture base 21 can be made to conform to the shape.

[0041]

According to the first aspect of the present invention, there is provided a gas leakage alarm fixing device for a magnet-type curved surface, which is mounted on a gas storage container magnetized by an external magnetic field to show magnetism. A fixture provided on the gas leak alarm, the fixture base being deformable to correspond to the shape of the mounting position of the gas storage container; and The gas leak alarm and / or the fixture base is provided on the fixture base so as to allow deformation of the fixture base, and exerts a magnetic attraction force with respect to a mounting target position of the gas storage container. And a magnet for maintaining a state conforming to the shape of the mounting target position of the container.

According to the magnet type curved surface fixing fixture of the gas leak alarm according to the first aspect, the fixture base provided in the gas leak alarm is formed in a shape (for example, a flat surface) at a mounting target position of the gas storage container. Shape, concave curved shape, convex curved shape,
(A concave bent shape, a convex bent shape, etc.) and can be deformed so as to match, and the gas leak alarm and / or the magnet provided on the fixture base allow deformation of the fixture base. In addition, the magnetic attraction force is exerted on the mounting position of the gas storage container, and the state in which the fixture base matches the shape of the mounting position of the gas storage container can be maintained by the magnetic attraction force of the magnet. become. Therefore, the magnetic attraction force of the magnet is sufficiently exerted on the mounting target position of the gas storage container without generating a gap between the shape of the mounting target position of the gas storage container and the fixture base,
The gas leak alarm can be easily and reliably mounted to any shape of the mounting target position of the gas storage container, a predetermined stability is obtained, and the reliability as the alarm is not impaired.

According to a second aspect of the present invention, there is provided the gas leakage alarm device according to the first aspect of the present invention, wherein the fixture base is provided with an external magnetic field. It is characterized by being made of a material that is magnetized to show magnetism.

According to the magnet type curved surface fixing device of the gas leak alarm according to the second aspect, a material (iron, cobalt, nickel, or an alloy containing at least one of these materials) that is magnetized by an external magnetic field and exhibits magnetism Etc.), the magnetic flux lines generated from the magnet are concentrated in the base, and the magnetic flux lines by the magnet and the magnetized magnetic flux lines by the fixture base are matched. As a result, the magnetic force on the gas leak alarm side is increased, and the magnetic attraction of the gas leak alarm on the gas storage container is strengthened. Therefore, the further enhanced magnetic attraction force of the magnet is exerted on the mounting position of the gas storage container, and the gas leak alarm is easily and more securely mounted on any shape of the mounting position of the gas storage container. The predetermined stability can be obtained, and the reliability as an alarm device is not impaired.

According to a third aspect of the present invention, there is provided the gas leakage alarm device according to the first or second aspect, wherein the fixing member base comprises: It is characterized by having at least an annular peripheral wall portion, and providing a plurality of notched grooves on an opening peripheral edge of the annular peripheral wall portion.

According to the magnet type curved surface fixing device of the gas leak alarm according to the third aspect, the fixing member base is deformed by the application of external force, and maintains its current shape unless external force is applied. In the case where the annular peripheral wall has a predetermined strength, it is possible to maintain a predetermined shape before and after the deformation by the annular peripheral wall, and a plurality of notches provided on the peripheral edge of the opening of the annular peripheral wall. The opening side of the annular peripheral wall provided with the cutout groove is easily expanded, and the annular peripheral wall can be bent so as to conform to the shape of the mounting target position. Therefore, even if the gas leak alarm is repeatedly attached to and detached from the gas storage container, the fixture base before and after the deformation can be maintained in a predetermined shape, and the magnetic attraction force of the magnet increases the mounting of the gas storage container. By exerting it to the target position, the gas leak alarm can be easily and securely mounted to any shape of the mounting position of the gas storage container, and the predetermined stability can be obtained. Reliability is not impaired.

In the case where the annular peripheral wall is magnetized by an external magnetic field as described in claim 2 to exhibit magnetism, the shape of the annular peripheral wall is shifted to the center thereof. The magnetic flux generated by the magnet is efficiently concentrated in the peripheral wall of the magnet, and the magnetic flux line by the magnet is aligned with the magnetic flux line by the magnetized fixture base. As a result, the magnetic force on the vessel side is increased, and the magnetic attraction of the gas leak alarm to the gas storage container is strengthened. Therefore,
The enhanced magnetic attraction of the magnet is exerted on the mounting position of the gas storage container, and the gas leak alarm can be easily and more securely mounted on any shape of the mounting position of the gas storage container. As a result, predetermined stability is obtained, and the reliability as an alarm is not impaired.

According to a third aspect of the present invention, the fixture base further includes a bottom portion so as to cover one opening in the annular peripheral wall portion. It is good also as an aspect formed in a box shape.
This bottom portion functions as a reinforcing member of the peripheral wall portion, and is deformed by the application of external force, and has a certain degree of strength so as to maintain the current shape unless external force is applied. Accordingly, the predetermined shape before and after the deformation can be maintained, and the maintenance performance of the shape of the annular peripheral wall before and after the deformation can be improved.

According to a fourth aspect of the present invention, there is provided the gas leak alarm device according to the first or second aspect, wherein the fixture base is curved. It is characterized by having a free seat portion.

According to the magnet type curved surface fixing fixture of the gas leak alarm according to the fourth aspect, the fixture base can be adapted to any shape by the bendable sheet portion. Therefore, the magnetic attraction force of the magnet is sufficiently exerted on the mounting target position of the gas storage container without generating a gap between the shape of the mounting target position and the fixture base,
The gas leak alarm can be easily and reliably mounted to any shape of the mounting target position of the gas storage container, a predetermined stability is obtained, and the reliability as the alarm is not impaired.

[Brief description of the drawings]

FIG. 1A is a schematic perspective view showing an embodiment of the present invention, and FIG. 1B is a schematic cross-sectional view of FIG. 1A.

FIG. 2A is a schematic perspective view showing another mode of use of FIG. 1A, and FIG. 2B is a schematic cross-sectional view of FIG. 2A.

FIG. 3 (a) is a schematic perspective view showing another embodiment of the present invention, and FIG. 3 (b) is a schematic transverse sectional view of FIG. 3 (a).

FIG. 4 is a schematic perspective view showing an embodiment of a gas storage container to which a gas leak alarm is mounted, and a mounting position of the gas leak alarm.

FIG. 5 (a) is a schematic perspective view showing a conventional technique, and FIG. 5 (b) shows a mode in which the conventional fixing tool of FIG. 5 (a) is mounted on a flat mounting target position of a gas storage container. FIG. 5 (c) is a schematic plan view showing a mode in which the conventional fixing device of FIG. 5 (a) is mounted at a mounting mode position curved into a concave curved shape of the gas storage container.

[Explanation of symbols]

Reference Signs List 8 gas leak alarm device 9 gas storage container 10, 20 magnet type curved surface fixing fixture of gas leak alarm device of the present invention 11, 21 fixture base 12 magnet sheet 13, 23 screw 22 rod-shaped magnet 50 of conventional gas leak alarm device Fixture 51 Rigid magnet with flat shape

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroyuki Takaoka 23 Minamikashima, Futamata-cho, Tenryu-shi, Shizuoka F-term in Yazaki Keiki Co., Ltd. (Reference) 3E072 AA10 GA30 5C086 AA02 DA40 GA10

Claims (4)

[Claims] 1. A magnet type curved surface fixing device for mounting a gas leak alarm device on a gas storage container magnetized by an external magnetic field and exhibiting magnetism, provided on the gas leak alarm device. A fixture base that can be deformed so as to correspond to the shape of the mounting target position of the gas storage container; and the gas leak alarm and / or the fixture that allows deformation of the fixture base. A magnet that is provided on the base, exerts a magnetic attraction force on the mounting target position of the gas storage container, and maintains the state in which the fixture base matches the shape of the mounting target position of the gas storage container. A magnet type curved surface fixing device for a gas leak alarm. 2. The apparatus according to claim 1, wherein the fixture base is magnetized by an external magnetic field to show magnetism.
The magnet-type curved surface fixing device of the gas leak alarm described in 1. 3. The fixture base body has at least an annular peripheral wall portion, and a plurality of cutout grooves are provided on an opening edge of the annular peripheral wall portion.
The magnet-type curved surface fixing fixture of a gas leak alarm according to claim 1 or 2, wherein: 4. The fixture according to claim 1, wherein the fixture base has a bendable sheet portion.