JPH0682254A - Inclination detector - Google Patents

Abstract

PURPOSE:To set a detection angle easily with a simple structure by retaining a magnetic detection element and providing a retention lever which is formed so that the position can be adjusted. CONSTITUTION:For detecting the angle of a certain direction from the horizontal direction, the inclination detector is fixed to an object 14 to be detected in the direction for detecting the inclination by a mounting hole of a main body case of the detector. Then, the object 14 to be inspected is inclined at an angle to be set and the state is retained. a minus screw driver is inserted into a driver port 6c of one support axis 6b for rotating the retention lower 6 holding a magnet 4 so that, it is lowered from the upper surface. and then it is adjusted to a position where a lead switch 7 of a magnetic detection element is ON. At this time, a swinging pendulum 2 droops in the vertical direction being matched to the inclination of the object 14 to be inspected. Then, the object 14 to be inspected can be released to the original state. This operation allows an angle in one direction from the horizontal one to be set and hence the switch 7 to be operated and a signal to be taken out when the object 14 to be inspected is at the setting angle again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to various machines and equipment,
The present invention relates to a tilt detecting device which is attached to an object that should not tilt more than a certain angle, detects the tilt, and emits a signal when the set angle is reached.

[0002]

2. Description of the Related Art Conventionally, for equipment such as cranes and bulldozers, which are very dangerous to fall over at a certain angle, such as construction machinery such as cranes and bulldozers, it is very dangerous to detect the inclination and to make a certain angle. An inclination detection device is provided to issue an alarm when the above is reached.

There are various kinds of tilt detecting devices of this type in recent years, and a tilt detecting device detects an angle by a semiconductor magnetoresistive element opposed to a magnet rotated by a weight.
Various products are commercially available, such as a mercury switch that is turned off, a magnetic switch that moves the magnetic fluid depending on the tilt to operate the reed switch, and another that detects the tilt of a liquid or a ball on a spherical surface.

[0004]

However, the conventional inclination detecting device as described above requires precision in parts and requires a complicated electric circuit, or conversely increases precision. In principle, the detection accuracy is not high,
For example, it was impossible to set an arbitrary angle. In addition, the structure using a semiconductor magnetoresistive element and a weight has a complicated structure such as immersing the whole sensor part in oil, and therefore all of these were very expensive and could only be installed in a large device. .

In view of the above problems of the prior art, the present invention provides an inclination angle detecting device which is inexpensive and has a simple structure, in which the detection angle can be easily set, and which can be incorporated in a simple mechanical device or a carrier. It is intended to be provided.

[0006]

In order to solve the above problems, the present invention is directed to a pendulum which rotates about one fulcrum according to the inclination of an object to be inspected, and a magnet attached to the pendulum. And a detection element that faces the magnet and detects the magnetism at a position separated by a certain rotation angle with respect to the vertical direction of the pendulum in the rotation direction of the magnet, and holds the detection element and detects the position. A holding lever formed so that it can be adjusted, the predetermined tilt of the symmetrical object to be inspected is detected by the detection element when the magnet rotates at a set arbitrary angle.

Further, according to the present invention, a tank serving as a partition is provided between a pendulum provided with a magnet and a holding lever, and a liquid is put into the tank so as to exert a damping action on the vibration of the pendulum. Is. Furthermore, the detection element is a Hall IC to reduce the influence of the attraction force between the magnet and the detection element.

Further, two inclination detecting devices are provided in parallel,
The holding lever of one tilt detection device is set to an arbitrary first angle to output a signal, and the holding lever of the other tilt detection device is set to another angle so that the object to be inspected It is configured to output a signal when the first and second angles are reached.

[0009]

According to the present invention, when the object to be inspected is tilted in one direction from the horizontal, the fulcrum shaft connected to one of the holding levers is rotated to move the holding lever to the set angle of inclination of the object to be inspected. If set, the pendulum tilts according to the tilt of the object to be inspected, and when the tilt reaches a set angle, the magnet of the pendulum turns on the magnetic detection element facing the pendulum to emit a signal. Further, when the object to be inspected is tilted in a different direction from the horizontal direction, if the other holding lever is set to an angle, the other magnetic detection element is similarly turned on and a signal is emitted. That is, the tilt angles in the right and left directions with respect to the horizontal can be set arbitrarily, and a signal can be taken out when the object to be inspected is tilted at each set angle.

Further, since only the pendulum is immersed in the liquid in the provided tank, the pendulum can be damped with a simple structure and malfunctions and liquid leakage can be reduced. If two tilt detection devices are provided and one device sets the deflection angle and the other device sets another angle setting (for example, zero degree horizontal angle), a signal indicating which side is always tilted. Can also be taken out.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the inclination detecting device of the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a central sectional view of the inclination detecting device, and a top cover 9 is provided on a top surface of a main body case 1 of the inclination detecting device.
On the lower side of the center of the upper surface lid 9, there are provided protrusions 9a that serve as holding portions at both ends of the fulcrum pin 5 that serves as the pivot of the pendulum 2. One end 2a of the pendulum 2 is rotatably supported by the fulcrum pin 5, and a weight 3 is held at the other end.
In this embodiment, the pendulum 2 is a resin molded product, and the elastic force of the pendulum 2 holds the weight 3 on the pendulum 2 by the spring force of the weight holding portion 2a. In addition, a magnet 4 such as a ferrite magnet is provided at a substantially central portion 2b of the pendulum 2. The pendulum 2 is always oriented vertically by the weight 3, and their relative positions (angles) depend on the place where the tilt detection device body case is placed.
Will change. As for the positional relationship between the weight 3 and the magnet 4, the weight 3 is provided at the bottom and the magnetic detection element 4 is provided at the center.
This is to increase the rotational moment of the pendulum 2 that tends to become vertical so that it is not affected by load torque such as friction at the fulcrum. Further, the length of the arm of the pendulum is set as long as possible to increase the absolute amount of the rotation moment due to the weight so as to reduce the influence of the attraction force between the magnet and the magnetic detection element. In particular, in the case of a reed switch, since the suction force is strong, this effect is great and it is important for making the device small. When the Hall IC is used, its suction force can be reduced.

Further, magnetic detecting elements 7 and 17 are provided so as to face each other with the magnet 4 in the rotating direction of the magnet at a position separated by a certain rotation angle with respect to the vertical direction of the pendulum. There is. The magnetic detection elements 7 and 17 are
Although the reed switch is used in this embodiment, any element such as a Hall element (IC) or a semiconductor magnetoresistive element that operates by magnetic force may be used. In the case of a Hall IC or the like, the attraction force between the magnet and the Hall IC is small, so the device can be made compact. In addition, the ON-OFF signal can be taken out by supplying only the power, so it is very easy to use. This magnetic detection element 7,
17 is fixed to holding levers 6 and 16 provided on both outer sides of the pendulum 2. Here holding lever 6,16
The rotary fulcrum shafts 6b and 16b are provided on substantially the same axis as the fulcrum pin 5 which is the fulcrum of the pendulum 2, and are rotatably supported by the bearing portions 1a and 1a 'of the main body case. Here, the axis of the fulcrum pin 5 and the rotation fulcrum axis 6 do not necessarily have to be on the same axis, and even if they are slightly deviated from each other (about 15 mm), they need only be in a symmetrically symmetrical relational position.
(It can be moved up or down.) And its position is adjustable. It should be noted that one end of each of the rotation fulcrum shafts 6b, 16b is provided with a driver's insertion port 6c, 16c for setting a rotation angle (tilt angle) from the outside. In addition, the holding lever 6,
At the center of 16, there are holes 6a, 16a for receiving reed switches, which are magnetic detection elements, and mounting holes 6d for the lead wires.
There are 6d ', 16d, 16d', which are connected to the lead wire 11 for signal extraction at that position.

Support shafts 6b and 16b of the holding levers 6 and 16
Between the main body case 1 and the spring member 8 (O in the present embodiment).
A ring) is inserted, and the set holding lever 6 is pressure-bonded and held so as not to freely rotate due to a shock or the like. Further, a tank 10 serving as a partition is provided between the magnet 4 and the magnetic detection elements 7 and 17. The tank 10 is fitted and adhered to the groove 9b of the upper lid 9 so that the liquid therein does not leak. Further, a screw lid 12 is provided on a part of the upper surface lid 9 and serves as a liquid inlet into the tank. Here, the thickness of the tank is made as thin as possible because it directly affects the sensitivity of the magnetic detection element. By making it thinner,
Since the tank expands and contracts in response to temperature changes, it is also effective against oil leakage. The liquid to be put in the tank is used to prevent the pendulum from shaking excessively due to vibration or the like to prevent malfunction, and normally silicone oil or the like is used. Further, the tank 10, the top cover 9, the fulcrum pin 5, and the pendulum 2 are one unit. After the holding lever is assembled to the main body case, this unit is inserted to complete the assembly and service. Making it very easy. The body case 1 is provided with a mounting screw hole 1b for mounting on the tilted inspection object 14. The cover 13 also serves as a magnetic shield and a dust proof, and reduces the influence of external magnetic force on the magnetic detection element.

The operation of the above configuration will be described below. First, (1). When it is desired to detect an angle in a certain direction from the horizontal, the object to be inspected 14 is fixed by the mounting hole 1b of the main body case 1 of the tilt detecting apparatus in accordance with the direction in which the tilt is to be detected. Next, the object to be inspected 14 is tilted to the desired angle of the signal (the desired angle to be set) and held in that state, and a minus driver is inserted into the driver port 6c of one of the fulcrum shafts 6b to lower the magnet holding lever 6 from the upper surface. The reed switch 7 of the magnetic detection element is adjusted and set to a position where it is turned on. At this time, the pendulum 2 hangs vertically according to the inclination of the inspection object 14. After that, the inspection object 14 is opened to its original state. By this operation, the angle can be set in one direction from the horizontal, so the next time the inspection object 14 reaches the set angle again, the reed switch 7
Can operate and take out the signal. (2). In addition to the above case, when it is necessary to set the other angle with respect to the horizontal, the setting of the main body case is performed again in the same manner, and this time, the fulcrum shaft 16b is rotated to lower the holding lever 16 from the upper surface. The reed switch 17 is turned to adjust the ON position of the reed switch 17 to set the other angle. In this way, signals can be taken out at arbitrary angles on the left and right sides with respect to the horizontal.

(3). When it reaches a horizontal angle (zero degree)
When you want to take out only the signal, set the main body case 1 horizontally as shown in FIG. 3, turn one holding lever 6 counterclockwise as shown in the figure, and set the reed switch 7 to ON. To do. Similarly, the magnetic detecting element 16 on the other side of the drawing is turned clockwise (in the drawing) to set. At this time, the respective holding levers 6 and 16 have angles α ₀ and β ₀ as shown in the figure. Here, the angle of α ₀ + β ₀ is determined by the size of the magnet 4, the strength of the magnetic force, the sensitivity of the reed switch, the position from the fulcrum where they are attached, etc., but the smaller this value, the larger the set angle range. Taken and desirable.
By setting in this way, even when the inspected object 14 is swaying, a signal can always be emitted when the object 14 is horizontal. (4). Further, if it is desired to take out a signal at a certain angle even if the main body case 1 is tilted right and left like the above, the same setting may be performed by inclining the body case 1 to the set angle. (5). When it is necessary to set a total of three angles, that is, the horizontal angle and any left and right angles, two of the tilt detection devices are arranged, one of which is set to the above (2) and the other is set to (3). Should be carried out. A state diagram of this setting is shown in FIG. 3B, in which α ₀ and β _{0 set} a horizontal angle of zero, and α ₁ and β ₁ set left and right angles.

[0017]

As described above, according to the present invention, a pendulum that rotates about one fulcrum according to the inclination of the object to be inspected,
A magnet attached to the pendulum, a detection element for detecting the magnetism facing the magnet at a position separated from the vertical direction of the pendulum by a certain rotation angle in the rotating direction of the magnet, and the detection element. A holding lever formed to hold the element and adjust its position so that the detection element detects a predetermined inclination of the symmetrical object to be inspected when the magnet rotates at an arbitrary set angle. It is an inexpensive and simple structure, the detection angle can be easily set, and it can be incorporated in a simple mechanical device or a carrier. Moreover, since the angle setting is adjusted and set by inclining to an actual angle, the reproduction accuracy is very high because it is not affected by the accuracy of each component or the characteristics of the magnet, the magnetic detection element, and the like.
Further, when the magnetic detection element is a Hall IC, since the attraction force between the magnet and the Hall IC is almost zero, the position change of the pendulum due to the attraction force can be ignored and the accuracy is improved. Further, it is not necessary to increase the length of the arm of the pendulum in order to reduce the influence of the attraction force, so that it can be made compact. Furthermore, it is turned on only by supplying power.
Since the -OFF signal can be taken out, the electric circuit can be greatly simplified. Also, since the switch action can be taken out directly as in the case of using the reed switch, this inclination detecting device itself can be directly connected to other equipment, devices, computers, etc., which is easier and more convenient to use.

Further, a tank serving as a partition is provided between the pendulum provided with a magnet and the holding lever, and a liquid is put in the tank so that the pendulum has a damping action. The pendulum can be damped with a simple structure because it is immersed in the liquid in the tank provided with, and malfunctions can be reduced. If two tilt detection devices are provided and one device sets the deflection angle and the other device sets another angle setting (for example, zero degree horizontal angle), a signal indicating which side is always tilted. Can also be taken out.

[0019]

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a tilt detecting device according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a tilt detecting device according to an embodiment of the present invention.

FIG. 3 (a) is an angle setting procedure diagram of the embodiment.
(B) It is a schematic diagram of the setting angle of the same Example.

[Explanation of symbols]

 1 main body case 2 pendulum 3 weight 4 magnet 5 fulcrum pin 6,16 holding lever 6b, 16b rotation fulcrum shaft 7,17 detection element (reed switch) 8,18 spring material (O-ring) 9 top cover 10 tank 11 lead wire 12 screw lid 13 cover 14 object to be inspected

Claims (4)

[Claims] 1. A pendulum that rotates about one fulcrum according to the inclination of an object to be inspected, a magnet attached to the pendulum, and a rotation direction of the magnet that is constant with respect to a vertical direction of the pendulum. At a position distant from the rotation angle by facing the magnet to detect the magnetism, and a holding lever formed to hold the detection element and adjust its position, and set any A tilt detecting device, wherein a predetermined tilt of the symmetrical object to be inspected is detected by the detecting element when the magnet is rotated at an angle. 2. The tilt detecting device according to claim 1, wherein the detecting element is a Hall IC. 3. A pendulum provided with a magnet and a holding lever are provided between the holding levers, and a liquid is introduced into the tank so that the pendulum has a damping action. The tilt detection device described. 4. The two tilt detecting devices according to claim 1 are provided in parallel, the holding lever of one tilt detecting device is set to an arbitrary first angle to output a signal, and the other A tilt detecting device, wherein a holding lever of the tilt detecting device is set to another angle, and a signal is output when the object to be inspected reaches the first and second angles.