JPH0541369Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a tilting device equipped with a level device, which is equipped with a detector for detecting tilting, overturning, or vibration of various devices, and a level device for inspecting the level. This is related to fall and vibration sensors.

(Prior Art) A detector for detecting inclination or vibration (vibration), which is provided in the conventional safety device of various devices such as a stove, is separate from a level device for inspecting the level.

(Problem to be solved by the invention) However, separating the detector for detecting inclination or vibration and the leveler for inspecting the level increases the number of parts.

Therefore, in a box whose bottom can be seen through, an optical fiber is optically coupled to a light emitting element disposed on the ceiling of the box and hangs down, and the light from the light emitting element that passes through the optical fiber is emitted from the bottom of the box. A weight is suspended on the bottom of the box at a slight distance from the bottom, and when the box is horizontally stationary on the bottom of the box and the weight is suspended and stationary, the weight is released from the bottom surface of the weight. A light-receiving element is arranged at a position where the light hits to receive the light, and a position indicating line is marked on the bottom of the box to indicate the position where the box is horizontally stationary and the weight is hanging down. A detection means for detecting inclination, overturning, or vibration received by the box, and an inspection means for inspecting the horizontality of the box by checking the overlap between the weight and the position indicating line, There is a tilt/vibration sensor with a level (Japanese Unexamined Patent Publication No. 1-185411) that is packed in a single box.

However, since the tilt/vibration sensor with a level is equipped with a level function so that the inside of the box can be seen through, the light-receiving element that makes up the detector cannot detect external light from outside the box. I also receive it.

This can be improved considerably by using light outside of visible light and applying an optical filter to the light-receiving part of the light-receiving element, but it is not perfect and the cost increases due to the countermeasures. cormorant.

(Means for Solving the Problems) In order to solve the above problems, an optical fiber is optically coupled to a light emitting element arranged on the ceiling of the box and hangs down in a box whose bottom can be seen through. A weight provided so that the light from the light emitting element coming through the optical fiber is emitted from the bottom surface is hung on the bottom of the box slightly apart from the bottom, and the box is horizontally resting on the bottom of the box. A light-receiving element is arranged at a position where the light emitted from the bottom surface of the weight hits when the weight hangs down and stands still, and receives the light, and when the box stands still horizontally at the bottom of the box, the weight hangs down. A detection means for marking a position indicating line indicating the position at rest and detecting tilting, overturning, or vibration that the box receives; and detecting means for detecting the overlap of the weight and the position indicating line to determine the horizontality of the box. In the tilt vibration sensor equipped with a level function comprising an inspection means for inspection, the bottom of the weight is recessed, and the light-receiving surface of the light-receiving element is arranged to protrude upward from the bottom of the box. The weight is hung so that the recess at the bottom of the weight covers the light-receiving surface of the light-receiving element that protrudes upward, so that the light-receiving element does not receive external light. It is something.

(Function) Based on the above structure, the tilt/vibration sensor with a level device of the present invention can be installed in various devices, so that when the device is tilted, overturned, or generated or receives vibration, the tilt/vibration sensor with a level device of the present invention can When the box constituting this sensor is tilted, overturned, or vibrated, light is emitted from the bottom surface of the weight due to the movement of the weight suspended by the optical fiber due to the tilting, overturning, or vibration. The tilting, overturning, or vibration in the entire circumferential direction is detected by receiving a change in the amount of light based on a change in the emission direction of the weight using a light receiving element and obtaining this as an electric signal. The light receiving surface of the light receiving element is provided with a recess at the bottom thereof, and further, the light receiving surface of the light receiving element is arranged to protrude upward from the bottom of the box, and the light receiving surface of the light receiving element is arranged so that the recess at the bottom of the weight protrudes upward. Since the light receiving element is covered and hung so that the light receiving element does not receive external light, the detection can be performed stably without receiving external light.

In addition, the horizontality of the device equipped with this sensor is visually indicated from the overlap between the position indicating line marked on the bottom of the box and the weight.

(Example) An example of the present invention will be described below with reference to the drawings.

FIG. 1 is an internal perspective view of a tilt/vibration sensor with a level device showing an embodiment of the present invention, FIG. The figure shows a cross-sectional perspective view of a photodetector based on the light receiving element 8. As shown in FIG.

In FIG. 1, a box 1 is designed so that at least the inside of the bottom can be seen through, and a light emitting element 3 is mounted on the ceiling.
Allocate. An optical fiber 5 is optically coupled to the light emitting element 3 through a connector 4, and the optical fiber 5 is suspended. Further, at the tip of the optical fiber 5, a weight 6 with a concave bottom is inserted through the center of the weight 6, and the bottom of the weight 6 is suspended at a height slightly away from the bottom of the box 1. Light from the light emitting element 3 coming through the optical fiber 5 is weighted 6
is emitted from the bottom of box 1 toward the bottom of box 1. Also,
When box 1 stands still horizontally and weight 6 hangs down, weight 6
At the bottom of the box 1, which is exposed to the light emitted from the bottom surface of the box 1, a light receiving element 8 with a light receiving surface protruding upward is arranged so that the protrusion covers the recess of the weight 6.
The light emitted from the bottom surface of the weight 6 is received.

Furthermore, on the bottom of the box 1, mark a position indicating line 7 that matches the outline of the bottom surface of the weight 6 indicating the position at the position where the box 1 is horizontally stationary and the weight 6 is hanging and stationary. .

Note that the optical coupling between the light emitting element 3 and the optical fiber 5 may be performed directly without using the connector 4. Furthermore, although a conical weight is used as the weight 6 in this embodiment, other shapes such as a triangular pyramid may also be used. Alternatively, the box may be made so that the inside cannot be seen through, omit the position indicator line for inspecting the level, and have only a detector (sensor) that detects tilting, falling, or vibration without a level function. .

When such a structure is placed horizontally, tilted or overturned, and when it is subjected to vibration, first of all, when it is horizontally stationary, the outline of the bottom of the weight 6 suspended by the optical fiber 5 is It comes to a position directly above the position display line 7. From this, the horizontality of the box 1 can be inspected by looking at the overlap between the bottom surface of the weight 6 and the position indicating line 7. Further, in this case, the light from the light emitting element 3 that emits light due to the voltage applied to the lead terminal 2 of the light emitting element 3 is emitted from the bottom surface of the weight 6 through the optical fiber 5, and the light receiving surface of the light receiving element 8 is emitted from the bottom surface of the weight 6. irradiate and turn on the light receiving element 8. Thereby, by outputting the horizontal state of the box 1 as an ON electric signal from the lead terminal 9 of the light receiving element 8, the horizontal state of the box 1 can be detected.

Next, when the box 1 is tilted or tipped over, the optical fiber 5 suspending the weight 6 is bent by the weight of the weight 6 received in the direction of the tilt or tipping of the box 1, causing the weight 6 to move. Therefore, the contour of the bottom surface deviates from the position indicating line 7 in the direction of inclination or overturning. From this, the contour of the bottom of the weight 6 and the position display line 7
The direction in which the box 1 is tilted or overturned can be determined by looking at the deviation from the box 1. Furthermore, in this case, the light emitted from the bottom surface of the weight 6 through the optical fiber 5 deviates from the light-receiving surface of the light-receiving element 8 .
Turn off. As a result, the inclination or overturning of the box 1 can be detected by taking out the tilted or overturned state of the box 1 as an OFF electric signal from the lead terminal 9 of the light receiving element 8.

Also, during vibration, the weight 6 suspended from the optical fiber 5 swings in the direction of the vibration that the box 1 receives, and as the box 1 swings, light is emitted from the bottom of the weight 6 through the optical fiber 5. The direction of the light receiving element 8 changes to turn the light receiving element 8 ON and OFF. As a result, the vibration of the box 1 is extracted as an ON-OFF electric signal from the lead terminal 9 of the light receiving element 8, and the box 1
vibration can be detected.

(Effects of the invention) Since the present invention is configured as described above, it produces the effects described below.

Since the weight suspended by the optical fiber is suspended so that the recess of the weight covers the protruding light-receiving surface of the light-receiving element, the light-receiving element does not receive external light. Even if the entire interior of the box is made transparent for the purpose of making horizontal inspection easier, detection is reliable without being affected by extraneous light noise.

In addition, this type of sensor can be manufactured at low cost because the light color of the light emitting element and the light receiving element can be freely selected, such as by using visible light, without requiring measures against external light noise.

In addition, even if the weight is subjected to a fall, a large incline, or a vibration, the inner edge of the recess of the weight stops against the outer edge of the light-receiving surface where the light-receiving element protrudes. Or reduce the vibration inertia moment from vibration to horizontal standstill.

This also facilitates horizontal installation adjustment and speeds up detection of the area or return to horizontal rest from a fall or vibration.

In addition, in order to reduce the vibrational moment of inertia, in normal use, the strength of the optical coupling part between the light emitting element and the optical fiber that supports the suspended weight and the optical fiber that suspends the weight is easily maintained.
Furthermore, the impact between the inner edge of the recess in the weight and the protrusion of the light receiving element that hits it is small, and the strength of the light receiving element is easily maintained. It may be as simple as reinforcing the protrusion with a ring.

In addition, from these things, we can eliminate aging and
Improve durability and detection reliability.

[Brief explanation of the drawing]

FIG. 1 is an internal perspective view of a tilt/vibration sensor with a level device showing an embodiment of the present invention, FIG. The figure is a cross-sectional perspective view of a photodetector based on a light receiving element 8. 1... Box, 2... Lead terminal of light receiving element, 3...
...Light emitting element, 4...Connector, 5...Optical fiber, 6...Weight, 7...Position display line, 8...Light receiving element, 9...Lead terminal of light receiving element.

Claims (1)

[Claims for Utility Model Registration] An optical fiber is optically coupled to a light-emitting element disposed on the ceiling of the box in a box through which at least the inside of the bottom can be seen, and the optical fiber is hung down through the lower end of the box. A weight applied so that the light from the light emitting element is emitted from the bottom surface is hung on the bottom of the box slightly apart from the bottom, and when the box is horizontally stationary at the bottom of the box and the weight is suspended and stationary. A light receiving element is arranged at a position where the light emitted from the bottom surface of the weight hits, receives the light, and further indicates the position at the bottom of the box when the box is horizontally stationary and the weight is hanging down. A detecting means for marking a position indicating line to detect tilting, overturning, or vibration received by the box, and an inspection means for inspecting the horizontality of the box by checking the overlap between the weight and the position indicating line. In the tilt vibration sensor equipped with a level function, the bottom of the weight is recessed, and the light-receiving surface of the light-receiving element is arranged to protrude upward from the bottom of the box, so that the weight is A tilt/vibration sensor with a level, characterized in that a recess at the bottom of the weight covers and suspends the light receiving surface of the light receiving element which projects upward.