JPH0755549A - Seismoscope - Google Patents

Abstract

PURPOSE:To prevent the occurrence of disconnection near the middle and both end sections of lead wires connecting a fixed electrode to a mobile electrode by using belt-like flat wires as the lead wires. CONSTITUTION:A small-ball receiving board 41 is proximately fit to a seismoscopic ball above an inner casing 2 and a lower switch 51 is provided on the upper surface of the board 41. In addition, an upper switch 52 is provided above the lower switch 51. Mobile electrode terminals 51b and 52b are continuously connected to the switches 51 and 52 and lead wires 8 are respectively soldered 9 to the leading-out end sections of the terminals 51b and 52b. On the other hand, electrode terminal fitting sections 11 are formed in corresponding to the terminals 51b and 52b on the external surface of an outer casing l and fixed electrode terminals 12 are respectively fitted to the sections 11. Then the other ends of the lead wires 8 are soldered 9 to the upper end faces of the terminals 12. Each lead wire 8 is constituted of a belt-like tinplated flat annealed copper wire having a thickness (t) of 0.02-0.05 mm and width (W) of 0.2-1.0mm. Therefore, the lead wires 8 can withstand stresses even when the stresses occur in the wires 8, since the modulus of section and flexibility of the lead wire 8 are increased as compared with round wires.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor installed in various equipment such as a gas meter, a petroleum stove, an elevator, a chemical plant, a railway, etc. for the purpose of detecting earthquake motion and preventing various disasters. Regarding the seismic device.

[0002]

2. Description of the Related Art As a seismoscope of this type, an inner casing that accommodates a seismic ball inside is rotatably accommodated inside the outer casing so that the inner casing is swingable so that it can be self-aligned. It is known that the structure has a structure in which the swing is restricted as much as possible.
When a seismic ball rolls when an earthquake occurs, a switch provided on the inner casing side is activated to detect the earthquake.

In such a vibration sensor, since it is necessary to send a signal related to opening and closing of the switch from the inner casing side to the outer casing side, the movable electrode provided on the inner casing side and the fixed electrode provided on the outer casing side. The electrodes are connected by lead wires.

Conventionally, the lead wire is generally formed of a round wire made of copper or the like having a circular cross section, and both ends of the lead wire are joined and fixed to the electrodes by soldering.

[0005]

However, in the above-described seismoscope, since the inner casing is swingably suspended by the outer casing, when the inner casing swings due to an earthquake or the like, a gap between the electrodes is generated. The lead wire laid over the wire is deformed to generate stress, which deteriorates the lead wire.
In particular, since the end portions of the lead wires are fixed by solder, the vicinity of the soldered portion is largely deformed locally during swinging, so that the stress may be concentrated on that portion and disconnection may occur.

On the other hand, in order to prevent disconnection of the lead wire,
It is considered that the lead wire is made of a material having high rigidity. However, if the rigidity of the lead wire is increased, the flexibility is decreased. Therefore, when the inner casing tries to shift to the horizontal position by the self-aligning action, the resistance of the lead wire becomes large and the lead wire moves to the horizontal position. There was a risk that the transition of No. would not be performed smoothly and the detection accuracy would be reduced.

The present invention solves the above-mentioned problems of the prior art and effectively prevents not only the disconnection of the lead wire in the middle region but also the disconnection in the vicinity of the joint fixing portions on both sides, and the self-centering action of the inner casing. It is an object of the present invention to provide a seismoscope which can smoothly shift to a horizontal posture and improve detection accuracy.

[0008]

In order to achieve the above object, in the seismoscope of the present invention, an inner casing having a seismic ball rotatably accommodated therein can be automatically centered inside the outer casing. While one end of the lead wire is joined and fixed to a movable electrode provided on the inner casing side while the other end is joined and fixed to a fixed electrode provided on the outer casing side. In the vibration sensor, the lead wire has a thickness of 0.02 mm to 0.05 mm and a width of 0.2.
The gist is that it is configured by a band-shaped flat wire of mm to 1.0 mm.

[0009]

In the seismoscope of the present invention, as a lead wire for connecting the fixed electrode provided on the outer casing side and the movable electrode provided on the inner casing side which is swingable with respect to the outer casing, I am using a strip of flat wire.

For this reason, the lead wire according to the present invention can increase the section modulus and have good flexibility even when the lead wire is made of, for example, a conventional round wire, even if the lead wire has the same sectional area. Is what you can get.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an embodiment of the present invention and is a sectional view showing a seismoscope which is preferably used for a gas meter, and FIG. 2 is an exploded perspective view of the seismoscope.

As shown in both figures, this seismic sensor is rotatably accommodated in an outer casing (1), an inner casing (2) accommodated therein, and an inner casing (2). A seismic ball (3), a switch actuating part (4) including a small ball receiving plate (41) and a small ball (42), and a switch part including a lower switch (51) and an upper switch (52) ( 5), an inner lid (6) capped on the upper end of the inner casing (2), and an outer lid (7) capped on the upper end of the outer casing (1).

At the upper part of the inner casing (2), a small ball receiving plate (41) whose lower surface is formed as a concave spherical surface having a radius of curvature larger than that of the seismic ball (3) is provided to the seismic ball (3). Are fitted so as to be in a state of close proximity and separation.

A plurality of small ball receiving holes (41a) are formed in the small ball receiving plate (41) at equal distances from the center thereof at equal intervals along the circumferential direction, and each hole (41a). The switch actuating small ball (42) is housed in a vertically movable manner. In the natural state, each small ball (42) has a hole (41).
When the seismic ball (3) rolls inside the inner casing (2) and comes into contact with the small ball (42), it is arranged so as to slightly project downward from the lower end opening of a). , The small balls (42) can be lifted upward.

A lower switch (51) is provided on the upper surface of the small ball receiving plate (41). For the lower switch (51),
Corresponding to each of the plurality of small spheres (42), contact portions (51a) are continuously arranged so as to project in the outer diameter direction, and each contact portion (51a) is struck by each small sphere (42). It is arranged so that it touches.

Above the lower switch (51),
An upper switch (52) is provided so as to be close to and separated from the lower switch (51). The upper switch (52) is provided with a contact portion (52a) continuously protruding in the outer diameter direction, corresponding to each contact portion (51a) of the lower switch (51).

As described above, when the small ball (42) moves upward due to the rolling of the seismic ball (3), the contact portion (51a) of the lower switch (51) becomes the small ball (42). When pressed, the upper switch (52) bends upward and contacts (52) of the upper switch (52).
The switch part (5) is switched by contacting the contact part a).

Further, both switches (51) (52) have
The movable electrode terminals (5
1b) and (52b) are arranged in series, and the movable electrode terminals (51b) and (52b) are arranged so as to be pulled out in opposite directions outside the inner casing (2).
The lead wires (8) and (8) connected to the lead-out ends of the movable electrode terminals (51b) and (52b) will be described in detail later.

The inner lid (6) attached to the upper end opening of the inner casing (2) has a high-viscosity fluid accommodating recess (61) formed in the center of the upper surface thereof, and this recess (61).
In the state where the high-viscosity fluid (x) is filled in, the lid (6
2) is fitted.

The suspension shaft (63) inserted into the central hole of the lid (62) is provided with a substantially hemispherical engaging portion (63a) which engages with the lower surface of the lid (62). The locking part (63a)
And a wing portion (63b) provided on the lower side of the high viscosity fluid (63).

On the other hand, on the outer surface of the outer wall of the outer casing (1), the electrode terminals (51) of the switches (51) (52) are provided.
b) (52b), the electrode terminal mounting portion (11) is formed, and each electrode terminal mounting portion (1) is formed.
Rod-shaped fixed electrode terminals (12) and (12) are attached to 1) so as to be vertically penetrated.

A pair of inner casing support pieces (13) and (13) are formed on the outer surface of the peripheral wall of the outer casing (1) so as to project upward.
3) A plate member (14) for suspending the inner casing is provided so as to bridge over between (13).

Then, the plate member (14) for suspending the inner casing
An upper end of the suspension shaft (63) is swingably attached to an intermediate portion in the longitudinal direction of the. As a result, the inner casing (2) is suspended in the outer casing (1) in a self-alignable state in which the axial direction is automatically aligned with the vertical direction by its own weight. At the time of swinging the inner casing, the high-viscosity fluid (63) acts as a resistance material against the swinging motion, preventing the inner casing (2) from swinging due to inertial force, and accurately maintaining the horizontal posture. It is designed to be done.

As shown in FIGS. 3 and 4, the movable electrode terminals (51b) (52b) of the switches (51) (52) provided on the inner casing (2) side have lead wires (8).
One end side of (8) is joined and fixed by solder (9), and the other end side of the lead wires (8) and (8) is the same as the upper end surface of the fixed electrode terminals (12) and (12) on the outer casing (1) side. It is joined and fixed by solder (9).

As shown in FIG. 5, the lead wire (8) is composed of a strip-shaped annealed copper wire having a flat wire plated with tin (Sn) for corrosion resistance.

This flat wire has a thickness (t) of 0.02.
mm or more and 0.05 mm or less can be used, especially 0.03 mm or more and 0.04 mm or less can be suitably used, and further, the width (w) is 0.2 m.
It is possible to use those having a length of m or more and 1.0 mm or less, and particularly preferably those having a diameter of 0.3 mm or more and 0.5 mm or less.

That is, the lead wire (8) is required to have a cross section of a predetermined size in order to accurately transmit and receive signals, but a wire whose thickness (t) is less than 0.02 mm is used. Then, the width (w) increases in order to secure a predetermined cross section, and it becomes impossible to secure a sufficient solder attachment region to the electrode terminals (12) (51b) (52b), which is not preferable. Furthermore, if the thickness (t) exceeds 0.05 mm, the rigidity is increased and the flexibility is lowered, which may hinder the automatic alignment, which is not preferable. Similarly, if the width (w) is less than 0.2, the thickness (t)
Increase and the rigidity becomes too high, and the width (w)
Is more than 1.0 mm, the solder mounting area cannot be sufficiently secured, which is not preferable.

When the both ends of the lead wire (8) having such a structure are joined and fixed to the movable electrode terminals (51b) (52b) and the fixed electrode terminal (12), it is preferable to form some allowances in the intermediate region. Good. To form the clearance, for example, there is a method of slackening the intermediate region of the lead wire (8) or forming it into a U-shape or a wavy shape.

According to this vibration sensor, the lead wire (8) for connecting the movable electrode terminals (51b, 52b) on the inner casing side and the fixed electrode terminals (12, 12) on the outer casing side. As (8), since a strip-shaped flat wire is used, for example, when compared with a conventional lead wire made of a round wire,
Even if the cross-sectional areas are the same, the cross-sectional modulus can be increased and good flexibility can be obtained. For this reason, the inner casing (2) swings with respect to the outer casing (1) due to the occurrence of an earthquake or the passage of a vehicle, etc., and the lead wire (8) between the two.
Even if a stress occurs in the lead wire (8), the lead wire (8) can withstand the stress, and it is possible to effectively prevent the breakage of the lead wire intermediate region as well as the breakage in the vicinity of the joint fixing portion on both sides. Further, when the inner casing (2) shifts to the horizontal posture by the self-aligning action, the resistance force of the lead wire (8) becomes small, the shift to the horizontal posture is smoothly performed, and high detection accuracy is obtained. be able to.

By the way, as shown in FIGS. 6 (a) and 6 (b), the soft material (10a) is attached to the fixed portion of the lead wire (8) to the fixed electrode terminal (12) and the movable electrode terminal (not shown). Is applied so as to cover the area of the lead wire (8) from the solder fixing portion to the vicinity of the solder fixing portion,
Due to the elastic action of the soft material (10a), the vicinity of the solder fixing portion of the lead wire (8) is not locally deformed at the time of swinging, and the concentration of stress is avoided, so that the disconnection of the lead wire (8) is prevented. It can be prevented more effectively.

As the soft material (10a), an adhesive or the like can be used, and any material having elasticity in the cured state can be used. For example, silicone-based, synthetic rubber-based, urethane-based, resin-based, etc. adhesives can be preferably used.

Further, as shown in FIGS. 7A and 7B, the fixed electrode terminal (12) on the outer casing side of the lead wire (8).
In place of solder, the conductive soft adhesive (10) is fixed to the movable electrode terminal (not shown) on the inner casing side.
According to b), similarly to the above, the vicinity of the joint fixing portion of the lead wire (8) is not locally deformed during swinging, and the concentration of stress is avoided, so that the lead wire (8) The disconnection can be prevented more effectively. further,
Compared with the end treatment shown in FIG. 6, the end treatment of the lead wire does not require soldering work, and thus can be easily performed.

As the conductive soft adhesive (10b), any adhesive can be used as long as it has elasticity when cured and has conductivity. For example, a synthetic rubber adhesive, Acrylic-based, epoxy-based, vinyl-based, modified urethane-based, and phenol-based materials can be preferably used. However, after soldering, the conductive soft adhesive (10b) may be used to coat the periphery of the solder as shown in FIG.

[0034]

According to the seismoscope of the present invention, the lead for connecting the fixed electrode provided on the outer casing side and the movable electrode provided on the inner casing side which is swingable with respect to the outer casing. Since a strip-shaped flat wire is used as the wire, when compared with a conventional lead wire made of round wire, for example,
Even if the cross-sectional areas are the same, the cross-sectional modulus can be increased and good flexibility can be obtained. Therefore, even if the inner casing oscillates with respect to the outer casing due to the occurrence of an earthquake or the passage of a vehicle, and the stress is generated in the lead wire between them, the lead wire can withstand the above stress. Not only the disconnection of the region but also the disconnection in the vicinity of the joint fixing portion on both sides can be effectively prevented. Furthermore, when the inner casing shifts to the horizontal posture by the self-aligning action, the resistance force due to the lead wire becomes small, the shift to the horizontal posture is smoothly performed, and high detection accuracy can be obtained. can get.

[Brief description of drawings]

FIG. 1 is a sectional view showing a seismoscope according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the seismoscope of the embodiment.

FIG. 3 is a plan view showing the seismoscope of the embodiment with the outer lid removed.

FIG. 4 is a perspective view showing a joint portion of a lead wire in the seismoscope of the embodiment.

FIG. 5 is a cross-sectional view showing a lead wire of the seismoscope according to the embodiment.

FIG. 6 is a diagram showing a joint portion of a lead wire in a seismoscope of a modified example.

FIG. 7 is a diagram showing a joint portion of a lead wire in a seismoscope according to another modification.

[Explanation of symbols]

 1 ... Outer casing 2 ... Inner casing 3 ... Seismic ball 8 ... Lead wire 12 ... Fixed electrode terminal 51b, 52b ... Movable electrode terminal

Claims (1)

[Claims] 1. An inner casing rotatably accommodating a seismic ball inside is oscillatably accommodated inside an outer casing so as to be automatically aligned, while one end side of a lead wire is an inner casing. In a seismoscope which is joined and fixed to a movable electrode provided on one side, and the other end side is joined and fixed to a fixed electrode provided on the outer casing side, the lead wire has a thickness of 0.02 mm to 0.05 mm. , A width 0.2 mm to 1.0 mm band-shaped flat wire.