JPH04116739U - Seismic sensing device - Google Patents

Abstract

(57) [Summary] [Purpose] The object of the present invention is to provide a seismic sensing device that has a simple structure and is free from malfunctions caused by leakage or uneven distribution of viscous fluid. [Structure] A seismic sensor main body (4) having an earthquake motion detection mechanism is swingably suspended by a suspension shaft (10). A cylindrical member (7) is provided, and a lid (8) having a hanging shaft insertion hole (8a) in the center is fitted and fixed into the upper end opening of the cylindrical member (7). ) is filled with viscous fluid (X). As the hanging shaft (10), the shaft part (10a)
At least the upper half of the locking part (10b) is formed in the shape of a spherical bulge at the lower end, and the wing part (10c) extends laterally at the bottom of the locking part (10b).
and insert the shaft portion (10a) into the insertion hole (8
a), and at the same time insert the locking part (10b) into the insertion hole (8).
Lock it to the bottom edge of a).

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed for the purpose of detecting seismic motion and preventing various disasters, such as gas For various equipment and devices such as computers, kerosene stoves, elevators, chemical plants, railways, etc. Regarding the attached seismic device.

0002

[Conventional technology and its problems]

Conventionally, this type of seismic sensing device has been disclosed in, for example, Japanese Utility Model Application Publication No. 61-48325. The main body of the seismic sensor, which has a seismic motion detection mechanism, is always maintained in a vertical position. It is known that the equipment is suspended in a state where the rocking is restricted so that seismic motion is transmitted reliably. It is.

0003 That is, in the above-mentioned seismic device, the hanging shaft is fixed to the upper part of the seismic device body in an upwardly protruding manner. and the hanging shaft penetrates the bottom wall of the viscous fluid storage section disposed above the hanging shaft. The wing part provided at the upper end of the suspension shaft is supported to be able to swing freely in the suspended state, and the wing part provided at the upper end of the suspension shaft is used to accommodate viscous fluid. A hanging structure is used that allows it to swing within the storage compartment.

0004 However, the suspension shaft penetrates the bottom wall of the viscous fluid storage section located above it. Because it is supported so that it can swing freely in the A liquid-tight structure must be adopted, such as by interposing a bellows between the hanging shaft and the bottom wall. First, the structure becomes complicated, leading to an increase in manufacturing costs. On the one hand, the main body of the seismic sensor is swingably suspended within the outer casing, and The bottom of the outer casing is filled with viscous fluid and the seismic sensor body is attached to the casing. There are also known devices in which the swing of is restricted.

[0005] With such a structure, there is no possibility that viscous fluid may leak out during use. Although it is inconvenient, if the casing is held upside down before installation, for example, viscous fluid will be absorbed by the outer shell. If the lead wires leak outside from the lead wire exit hole of the There was a risk that it would adhere to the spots and cause poor contact. Also, the viscous fluid The thing moves from the bottom to the side, and even if it is returned to the vertical position, the viscosity remains. Because it takes a considerable amount of time for the fluid to return to its place at the bottom of the outer casing, There was a risk that seismic motion would not be detected accurately until a considerable amount of time had passed after the installation. This idea was made in view of the above-mentioned problems, and has a simple structure. , and there is no risk of malfunctions caused by leakage or uneven distribution of viscous fluid. The purpose is to provide equipment.

[0006]

[Means to solve the problem]

Therefore, the seismic sensing device according to this invention has a viscous fluid storage chamber in the upper part of the seismic sensor body. A suspension shaft is inserted through the top of the suspension shaft to allow it to swing freely. be.

[0007] That is, in the seismic sensing device according to this invention, the seismic sensor body having the seismic motion detection mechanism is suspended. A seismic sensing device swingably suspended by a lower shaft, A cylindrical member with an open top is provided at the center of the top of the seismic sensor body, and the cylindrical member has an open top. A lid body having a suspension shaft insertion hole in the center is fitted and fixed to the upper end opening, and the lid body has a cylindrical shape. While the space surrounded by the member and the lid is filled with viscous fluid, The hanging shaft has a locking member formed at least in the upper half in the shape of a spherical bulge at the lower end of the shaft. and laterally extending wing portions at the lower part thereof, and the shaft portion is loosely inserted into the insertion hole. and a locking portion is locked to a lower edge of the insertion hole. This article focuses on seismic sensing devices.

[0008]

[Effect]

The main body of the seismic sensor, which has a seismic motion detection mechanism, is suspended by a suspension shaft so that it can swing freely. This means that even if the seismic sensor is installed at a slight incline, it will always remain vertical. It will be done.

[0009] The locking part of the hanging shaft has a spherical bulge at the part that locks on the lower edge of the hanging shaft insertion hole of the lid. Since the seismic sensor body is formed in a shape, the main body of the seismic sensor can be tilted 360 degrees in any direction. The wing section provided at the lower end of the hanging shaft connects the cylindrical member of the seismic sensor body and its upper end opening. It is placed facing into the viscous fluid filled in the space surrounded by the closing lid body. Therefore, while the tilting of the seismic sensor body is allowed under regulatory conditions, the seismic motion Accurately transmitted to the main body of the device.

0010 The viscous fluid closes the cylindrical member provided at the top of the seismic sensor body and its upper opening. It is filled in the space surrounded by the lid and is suspended from the suspension shaft insertion hole of the lid. Since the shaft part of the shaft is inserted, the viscosity of the fluid prevents the fluid from leaking to the outside. There is no risk of leakage.

[0011]

【Example】

The following is an illustration of the seismic sensing device according to this invention applied to a gas meter seismic sensing device. This will be explained based on an example.

0012 The vibration sensing device of the embodiment shown in FIGS. A seismic device that houses a seismic ball (2) and has a switch section (3) above it. The main body (4) is always kept vertical inside the outer casing (5) and its rocking is restricted. It was hung in a suspended state.

[0013] In the center of the lid (6) of the inner casing (1), there is a cylindrical part with an open top. The material (7) is fixed, and a correspondingly shaped lid (8) is forcibly fitted into the upper opening. are combined.

[0014] The inner casing (1) has an inner casing (1) with both ends locked inside the outer casing (5). Attached to the side casing suspension strip material (9) and its longitudinally intermediate portion in a downwardly protruding manner. Suspended and fixed inside the outer casing (5) by a suspended suspension shaft (10) It is. This suspension shaft (10) has a spherical bulge-shaped locking portion (10b) at the lower end of the shaft (10a). ) and a disc-shaped wing part (10c) at the lower end, and a shaft part (10c). 10a) is loosely fitted into the suspension shaft insertion hole (8a) formed in the center of the lid (8). At the same time, the locking portion (10b) is locked to the lower edge of the insertion hole (8a). The inner casing (1) is swingably suspended and fixed within the outer casing (5). ing. At least the upper half of the locking portion (10b) is formed into a spherical bulge shape. It is sufficient that the wing part (10c) is not necessarily disc-shaped. It is also possible to adopt any other shape.

[0015] In addition, the dimensions of each member in the above example are such that the diameter of the shaft part (10a) of the hanging shaft (10) is Approximately 0.8 mm, the hanging shaft insertion hole (8a) into which it is inserted loosely has a diameter of approximately 1.3 mm, and its lower edge The radius of the locking part (10b) to be locked is approximately 0.75 mm, and the inner diameter of the cylindrical member (7) is approximately 6 mm. ．． 3mm, wing section (10c) placed facing the viscous fluid (X) filled inside. are each set to approximately 6 mm in diameter.

[0016] In this suspended state, the vibration of the outer casing (5) is transmitted to the inner casing (1). At the same time, the inner casing (1) is prevented from swinging due to inertia. For the purpose of A viscous fluid (X) is filled in the space. As this viscous fluid (X), The inner casing (1) can be maintained vertically at all times, and the inner casing can prevent vibrations. (1) It must be able to transmit data efficiently, its performance will not deteriorate over a long period of time, and it must be able to prevent oil leakage. For example, silicone with a viscosity of about 10,000 (cP) that satisfies various conditions such as that there is no risk of release. oil (Shin-Etsu Chemical Co., Ltd., trade name "KF-96H", etc.) is preferably used. It will be done. In addition, if necessary, a conical bar may be added between the strip material (9) and the lid (8). A swing regulating member that does not impede the alignment action of screws, etc., and a bellows to prevent viscous fluid from flowing out. It may be arranged in an intervening manner.

[0017] The inner casing (1) has a recess (1a) formed in the center of the inner bottom surface. A seismic ball (2) made of steel or the like with a diameter of approximately 11.11 mm is always placed above the recess (1a). It is stored in a preserved state. On the inside upper part of this inner casing (1), A small ball receiving plate (11) for actuating the contact piece, whose lower surface is formed into a concave spherical surface corresponding to the seismic ball (2). is fitted into the seismic ball (2) in a locked position where it is close to and separated from the seismic ball (2). There is. The receiving plate (11) is oriented equidistantly from its center, as shown in particular in Figures 1 and 3. A total of six holes with a diameter of approximately 2.6 mm (11 a) are drilled through the top and bottom, and as shown in Figure 1, each of these holes (11 a) are each fitted with a small contact actuating ball (12) made of steel or the like with a diameter of approximately 2.5 mm. There is. In this fitted state, each small ball (12) is inserted into the lower end opening of each hole (11a). It is held in place by the lower end reduced diameter part (11b) in a state where it protrudes slightly downward, and it can be moved up and down. It is said to be able to move freely. The center part of the top surface of the small ball receiver (11) is for mounting an on/off switch. A protrusion (11c) is provided, and a pair of upper and lower electrode pieces (13) (14) are attached to the protrusion (11c). ) is fixed to the open/close switch (15).

[0018] This open/close switch (15) is connected to the six movable contact pieces (13a) extending radially at an angle of approximately 60 degrees; Lower electrode (13) with one narrow lead piece (13b) extending between them and an upper electric terminal having a contact piece (14a) and a pull-out piece (14b) shaped approximately correspondingly to this. It consists of poles (14). The movable contact piece (13a) is attached to the small ball receiving plate (11). The length is sufficient to cover the upper part of the corresponding hole (11a), and the holes are adjacent to each other. must be in the same phase as the hole (11a). Both electrodes above (13) (14) Electrical properties (low contact resistance), strength (durability), flexibility (flexibility) or sensitivity), an ultra-thin plate material made of Cu-Be alloy with a thickness of about 0.03 mm is used. It is preferable to punch out the above shape, plate it with gold, and then heat treat it. used.

[0019] As shown in Fig. 1, each hole (11a) of the small ball receiver (11) is The center part of the lower electrode piece (13) is attached to the small ball receiver (11) so that the movable contact piece (13a) is located. ) is fitted and fixed to the switch mounting protrusion (11c), and an insulating washer is placed on top of it. The upper electrode piece (14) is connected to each contact piece (14a) so that the upper electrode piece (14) is in a close-separated state through the contact piece (16). be in phase with the movable contact piece (13a) of the lower electrode piece (13), and the pull-out piece (13b) (14 b) are fitted and fixed in a state where they are pulled out in opposite directions.

[0020] Here, the distance between the vibration-sensing ball (2) and the small balls for each contact piece operation (12) is approximately 0.2 mm. The seismic ball (2) is rolled inside the casing (1). When the vibration sensing ball (2) touches the small ball (12) at the corresponding position, the small ball (12) is pushed. be raised. This pushed up small ball (12) is then paired with the lower electrode piece (13). Push up the movable contact piece (13a) that corresponds to the upper electrode piece (14). contact piece (14a).

[0021] When the vibration stops and the seismic ball (2) finishes rolling, the seismic ball (2) and the small ball (12 ) and movable contact piece (13a) return to their original positions and prepare for the next vibration detection. become something that

[0022] As shown in FIGS. 1 and 3, the outer casing (5) has the above-mentioned inner casing inside. It is sized to accommodate the casing (1) in a swingable manner, and the upper casing It is divided into a single half body (5a) and a lower casing half body (5b).

[0023] The lower casing half (5b) has a phase difference of 90 degrees at four locations on its outer circumferential surface. , bulges (5c) (5c) (5d) (5d) along the axial direction are integrally provided. The lower ends of the pair of opposing bulges (5c) (5c) are provided with inserts for the printed circuit board. The fixing legs (5e) (5e) are integrally extended, and the bulges (5c) (5c) are A band plate attachment part (5f) (5f) is extended from the upper end. The other pair of bulges (5d ) (5d), conductive terminal rods (17) (17) are press-fitted into the buried state. , the upper end of each terminal bar (17) (17) has an opening drawn out from the inner casing (1). The drawer pieces (13b) (14b) of the close switch (15) are connected with rivets. and an inverted L-shaped terminal plate (18) (18) is fixed to the lower end in a downwardly protruding manner. This allows direct attachment to a printed circuit board without lead wires.

[0024] The outer circumferential surface of the upper casing half (5a) is also covered with the same material as the lower casing half (5b). The bulges (5g) (5g) (5h) (5h) are formed, but a pair of opposing bulges ( 5g) (5g) is formed in a wide shape extending in the circumferential direction.

[0025] This invention uses a conventionally known seismic sensor instead of the seismic sensor body shown in the above embodiment. This allows the use of the seismic device itself. In other words, the bottom has a gentle inverted conical shape. A seismic ball is housed in the formed casing, and the seismic ball is placed on top of the casing, and the bottom side is the seismic ball. The plunger has a disk-shaped portion formed into a concave spherical surface with a larger radius of curvature. The concave spherical surface is arranged to be movable up and down with the seismic sphere in contact with the seismic sphere. One end of the pressing plate is pivotally attached to a shaft protruding from the center of the upper end of the plunger. At the same time, the operating lever of the open/close switch is placed on the upper surface of the middle part of the press plate. The tip is pressed downward and the vibration-sensitive ball rolls inside the casing due to the vibration. By moving the ball, the concave spherical surface of the plunger is pushed upward, which causes The upper end shaft of the plunger pushes up the pressure plate, and the operating lever is pushed up accordingly. It is also possible to use a device that operates so that the contacts of the open/close switch are closed when the switch is closed.

[0026] Moreover, this invention is applicable to the seismic sensing device for gas meters as shown in the above embodiment. but not limited to, kerosene stoves, elevators, chemical plants, railways, etc. The present invention can also be applied to seismic sensing devices for various types of equipment and devices.

[0027]

[Effect of the idea]

As described above, the seismic sensing device according to the present invention is a seismic sensor having an earthquake motion detection mechanism. Since the main body of the seismic device is swingably suspended from a hanging shaft, it is tilted slightly. The seismic sensor body can always be maintained in a vertical position even when installed in an inclined position.

[0028] In addition, the locking part of the hanging shaft that is locked to the lower edge of the hanging shaft insertion hole of the lid body has a spherical bulge shape. The main body of the seismic sensor is always kept in the lead position even if it is installed tilted in any direction. Can be held straight.

[0029] Furthermore, the wing section provided at the lower end of the hanging shaft is attached to the upper center of the seismic sensor body. The viscosity is filled in the space surrounded by the cylindrical member and the lid that closes the upper opening. Because it is placed facing into the fluid, the vibration of the seismic sensor body is prevented under regulated conditions. seismic motion is accurately transmitted to the seismic sensor body.

[0030] Moreover, the viscous fluid is surrounded by the cylindrical member and the lid that closes the upper end opening. Since it is filled in a closed space, there is no risk of it leaking outside during normal use. Of course, there is no suspension shaft insertion hole in the lid, but there is a Since the shaft of the hanging shaft is inserted loosely, the viscosity of the viscous fluid causes Even if the vehicle is held in an overturned state, there is no risk of the fluid leaking to the outside. Therefore, maintenance management In addition to making it easier to detect seismic motion, it is also possible to accurately detect seismic motion immediately after installation.

[0031] In addition, although the structure is extremely simple as mentioned above, there is a risk of leakage of viscous fluid. Unlike conventional products, there is no bellows-like structure to prevent viscous fluid from leaking. No special liquid-tight maintenance member is required. Therefore, due to leakage or uneven distribution of viscous fluid, This eliminates the possibility of malfunction occurring due to malfunction.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a vibration sensing device.

FIG. 2 is a perspective view showing the suspension member of the seismic sensor body in a separated state.

FIG. 3 is a perspective view showing the seismic device in a separated state.

[Explanation of symbols]

4...Seismic sensor body 7...Cylindrical member 8...Lid body 8a…Suspension shaft insertion hole 10…Hanging shaft 10a...Shaft part 10b…Locking part 10c...wing section X...Viscous fluid

Claims (1)

[Scope of utility model registration request] 1. A seismic sensing device in which a seismic sensor main body (4) having an earthquake motion detection mechanism is swingably suspended by a suspension shaft (10), wherein the upper end of the seismic sensor main body (4) A cylindrical member (7) with an upper end opening is provided in the center, and a lid (8) having a suspension shaft insertion hole (8a) in the center is fitted and fixed in the upper end opening. The space surrounded by the shaped member (7) and the lid (8) is filled with viscous fluid (X), and the hanging shaft (10) has at least the upper half at the lower end of the shaft (10a). The locking part (10
b) and a laterally extending wing portion (10c) at its lower part, the shaft portion (10a) is loosely inserted into the insertion hole (8a), and the locking portion (10b) is inserted into the insertion hole (8a). A seismic sensing device characterized by being locked to the lower edge of the insertion hole (8a).