JPH11230744A - Float type inclinometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a float type inclinometer capable of detecting a highly accurate inclination angle without being affected by disturbance, being optimum especially for adoption to an underwater work machine used under a severe environment, satisfying rigidity and high accuracy conditions, and being effective for preventing the rolling of a machine body. SOLUTION: This device is loaded on the machine body of a back hoe or the like, and when the machine body is inclined to the left or right, a device main body case is inclined corresponding to the inclination angle. When the inclination angle exceeds a limit inclination angle on a protractor gauge display panel 12, 20 deg. for instance, the needle terminal 15b of an indicating needle float 15 is brought into contact with a conductive foil body 13 and electrically connected, an alarm circuit is ON operated and an alarm bell 20 is rung. By confirming the ringing of the alarm bell 20, an operator recognizes a danger that the machine body during an operation rolls and takes a measure so as to evade the rolling of the machine body by further inclination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float-type inclinometer, and more particularly to a float-type inclinometer suitable for preventing rollover of a body such as a backhoe used on land and underwater works.

[0002]

2. Description of the Related Art Generally, inclinometers are used for measuring the verticality and inclination angle of a building, and for measuring the inclination angle of a moving object. Conventionally, various scientific principles such as a gyro method using the inertia of a high-speed rotating body (rotating top), a pendulum method using the weight of the weight, and a float method using the buoyancy of bubbles have been proposed. Have been.

For example, a gyro-type inclinometer described in Japanese Patent Application Laid-Open No.
Japanese Patent Application Laid-Open No. 56-155808 discloses an omnidirectional inclinometer described in Japanese Patent Application Publication No.
There are inclinometers described in Japanese Unexamined Patent Application Publication No. Hei 8-14895. In the float method using air bubbles,
There is a well-known level.

In underwater working machines such as backhoes used for underwater works on piers and seawalls, the boarding operator sets the inclination angle of the aircraft in the front-rear and left-right directions in order to show the workability of the aircraft's hill climbing ability and turning ability. It is necessary to work safely while visually recognizing.

[0005]

In the case of such a submersible working machine, the operator has to use the buoyancy and water pressure acting on the body to
Judgment on the left and right inclination of the aircraft is generally less perceptual than on land work.

[0006] In order to detect the omnidirectional inclination angle of the body of such an underwater working machine, when the inclinometer described in each of the above-mentioned publications is mounted, the mechanism is complicated and the hydraulic pressure in the underwater is also functional. It is hard to say that it has the robustness to withstand the pressure, and it is easily affected by disturbance due to water pressure and vibration. Furthermore,
None of the conventional examples satisfies the conditions for use in underwater working machines, for example, it is almost impossible to use them in harsh working environments where see-through is not available, and they are not practical.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a float type inclinometer device which has a simple structure and can detect a tilt angle with high accuracy without being affected by disturbance.

Another object of the present invention is to provide a float type inclination which is most suitable for use in an underwater working machine used in a severe environment, and which satisfies the robust and high-precision conditions and is effective for preventing the body from rolling over. To provide a measuring device.

[0009]

A float type inclinometer according to the present invention comprises an apparatus main body case formed in a closed cylindrical shape, and a transparent hemispherical shape provided on a vertically upper portion of the apparatus main body case. Proportional scales are provided on the omnidirectional concentric circles from the poles of the sphere, and at least a specific angle of the scales is electrically conductive. A damper fluid filled and sealed in the upper portion of the apparatus main body case having the required viscosity and electric insulation, and a base end of a float immersed in the damper fluid by buoyancy are hinged, and the float is When the needle terminal made of a conductive material provided at the tip of the device comes into contact with the specific angle scale of the degree scale display panel, a pointer float that is electrically conductive, and a hermetic partition that partitions the inside of the device body case Store in space An alarm means for generating at least one signal of an alarm sound and an alarm lighting display at the time of electrical conduction due to contact between the needle terminal of the pointer float and the specific angle scale, and in an enclosed space partitioned inside the device body case. And a power supply including a storage battery connected to the specific angle scale, the needle terminal and the alarm means to form a power supply circuit.

In this case, the area between the specific angle graduation and the maximum angle graduation of the division graduation is coated with a conductive material, or all the division graduations including the specific angle graduation are formed in an annular shape by the conductive material. can do. Only the specific angle scale is formed in a ring shape by the conductive material to enable the extraction of the electric signal, and the other division scales can be displayed in a ring shape as a display mark.

The specific angle scale can be set arbitrarily, and may indicate, for example, an inclination angle of 20 ° when the apparatus body case is inclined with respect to the vertical line.

The specific angle scale can be set to an inclination angle when the apparatus body case is inclined with respect to the vertical line, for example, 20 °.

On the other hand, of course, not only can the device body case be mounted on a land-based working machine, but also it can be mounted on a submersible working machine including a backhoe by forming it with sealability and water pressure resistance when used underwater. Is also effective. In this case, in order to prevent the body from falling in the left-right and front-rear directions, the specific angle scale can be set to 20 ° in advance as a limit value of the body inclination angle.

[0014] Therefore, the operator on board the aircraft can be tilted by 20 ° regardless of the inclination of the aircraft in any of the front, rear, right and left directions.
By checking the limit with an alarm sound or lighting display by an electric signal, it is possible to prevent the body from tipping over.

In the case of mounting on a submersible working machine, a warning indicating the specific angle scale of 20 ° can be recognized by an operator on the submersible working machine. If so, it can be extracted as an alarm electric signal.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a float type inclinometer according to the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 3 are a side view, a plan view and a front view showing the appearance of a backhoe 2 which is an underwater working machine equipped with a float type inclinometer apparatus 1 of the present embodiment.

The backhoe 2 performs a work such as leveling by an operation of an operator in an operator room 5 at the water bottom by using a bucket 4 attached to the tip of a working arm 3 which bends and extends by hydraulic drive. It is also possible for the diving operator to work while being pressurized by the pressure supply system 6 from a support boat or the like on the water, or to perform remote operation from the water with complete unmanned operation.

FIG. 4 and FIG. 5 are a front view and a plan view of the inclinometer device 1 shown in a partial cross section. The apparatus main body case 10 having a sealed structure with required pressure resistance rigidity and sealing properties is cylindrical. Above the vertical line of the apparatus body case 10 in the vertical direction, a hemispherical dome-shaped degree scale display panel 1 made of a synthetic resin material such as transparent tempered glass or transparent acrylic.
2 are provided.

On the minute scale display panel 12, the pole at the top of the dome, that is, the center vertical line is set to 0 °, and the angle range up to 45 ° on the same axis is set to 10 °, 20 °, 3 °.
The angle is divided into 0 °, 40 °, and 45 °, and the degree angles of the omnidirectional concentric circles indicating the respective angles are 10 °, 20 °, 30 °, 40 °, and 4 degrees.
5 ° is displayed. These minute scales are written so that the operator in the operator room 5 can clearly see the view from above.

As is apparent from the schematic diagram of FIG. 6, a conductive foil 13 (see FIG. 6) covering the scale range from 20 ° to 45 ° along the inner surface of the sphere of the scale display panel 12. , A dashed line display section) are adhesively bonded. This conductive foil 1
Instead of 3, a conductive paint may be applied to the inner surface of the sphere.

Further, the inside of the apparatus main body case 10 including the upper scale display panel 12 is an enclosed space partitioned from the lower side by an upper partition plate 22. This closed space is filled with a damper oil 14 such as an acrylic oil, which is a damper fluid according to the present invention and has appropriate viscosity and electrical insulation.

In the damper oil 14, a pointer float 15
Is provided by immersion. This pointer float 15
It is composed of a float 15a of a hollow sphere, a needle terminal 15b at the tip end penetrating the center, and a rod 15c for securing the float 15a from buoyancy. The shape of the float 15a is not limited to a hollow sphere as shown,
The shape can be made optimal for guiding an accurate inclination angle. The needle terminal 15b at the distal end is formed of a suitable conductive material, and can be constantly pressed against and contacted with the inner surface of the hemispherical dome's degree scale display panel 12 by buoyancy acting on the float 15a.

Therefore, when the conductive foil 13 provided on the inner surface of the ball of the minute scale display panel 12 and the needle terminal 15b on the pointer float 15 move relatively and come into contact with each other, an electrical signal can be taken out by electrical connection. It has become.

The base end 15d of the rod 15c for holding the float is 360 ° above the vertical line on the upper partition plate 22.
The hinge shaft is rotatably supported in all directions. The hinge base end 15 d is connected to a power supply 16 by a rechargeable battery, for example, by a wiring 17.

When the pointer float 15 having such a structure is immersed in the viscous damper oil 14, disturbance such as mechanical vibration from the backhoe body is caused by the case body 1.
Propagation to the pointer float 15 through 1 is prevented by absorbing the vibration by the damper action.

Here, the battery power source 16 includes:
The apparatus main body case 10 partitioned by the lower partition plate 18
Stored in a closed space. Further, in the closed space provided between the lower partition plate 18 and the middle partition plate 19 in the middle part,
The alarm bell 20 which is an alarm means in the present invention is stored. The alarm bell 20 is used to warn the operator that the body of the backhoe 2 is tilted further left and right by sounding an alarm sound. Further, a closed space is provided between the middle partition plate 19 and the upper partition plate 22, and here, as a commonly known patrol light such as a rotary type,
An illumination lamp 21 that constitutes alarm means together with the alarm bell 20 is arranged. The illumination lamp 21 is provided for each of the minute angle scales 10 °, 20 °, 30
°, 40 ° and 45 ° are illuminated from below so that the visibility is poor underwater and the operator can clearly see it even in a dark environment.

The alarm bell 20 and the illumination lamp 21 constituting such alarm means are connected to the battery power supply 16 by respective wirings 17 to form an alarm circuit.

More specifically, each degree angle scale is 10 °,
Of the 20 °, 30 °, 40 °, and 45 °, for example, an angle scale of 20 ° can be preset to a specific angle to form an alarm circuit. When a specific angle of 20 ° is set, the entire area of an angle of up to 45 ° exceeding this angle of 20 ° is covered with the conductive foil 13.

Therefore, with the above configuration, the present embodiment operates as follows. Of the angle scales 10 °, 20 °, 30 °, 40 °, and 45 ° displayed on the minute scale display panel 12, an angle of 20 ° is set in advance to a specific angle.

As shown in FIGS. 7 and 8, on the bottom of the water below the working water depth, there are many cases where the backhoe 2 is inclined forward at an angle θ in the hill-climbing direction due to the ground shape of the bottom and the inclination of the creation surface. . In this case, the operator can perform the operation relatively intuitively and relatively safely by displaying the inclination angle indicating the climbing ability of the aircraft.

As shown in FIG. 8, when the body of the backhoe 2 tilts left and right, the inclinometer device 1 on the body also tilts as shown in FIGS. 9 and 10. The inclination angle is 20 ° which is the limit inclination angle set on the minute scale display panel 12.
Is exceeded, the needle terminal 15b of the pointer float 15 inside the case main body 11 contacts the conductive foil 13 and is electrically connected, the alarm circuit is turned on, and the alarm bell 20 sounds.

By confirming the sound of the alarm bell 20, the operator recognizes that there is a danger of the aircraft being rolled over, and takes measures to prevent the aircraft from rolling over by tilting further. It can be carried out.

FIG. 11 shows a float type inclinometer 1
FIG. 13 is a plan view schematically showing a degree scale display panel 12 on the upper part of the second embodiment.

In this case, instead of the conductive foil 13 shown in the first embodiment of FIG.
0 °, 20 °, 30 °, 40 °, 45 ° are conductive materials 30 ~
34, a circle is formed, or a circle is formed by conductive paint.

Therefore, the needle terminal 15b on the pointer float 15 side is provided with a degree angle scale of 10 °, 20 °, 30 °, 40 °.
When contact is made with any of the angles of 45 ° and 45 °, an electric signal corresponding to the inclination angle can be taken out. Of course, it is also possible to provide a circuit in which any of these degree angle scales is set to a specific angle in advance. Actually, the inclination angle of 10 ° in the above-mentioned minute angle scale is slight as an empirical angle at which the backhoe 2 rolls over and is not a problem. In this embodiment, even when the angle is 10 °, the conductive material 30 is used to detect an electric signal.

On the other hand, FIG.
It is a top view showing typically about 3rd Embodiment of it.

Also in this case, the conductive foil body 13 shown in the first embodiment of FIG.
Angle 20 among 0 °, 20 °, 30 °, 40 °, and 45 °
The angle is previously set to a specific angle, and is formed in a circular shape with the conductive material 40, or is displayed in a circular shape with conductive paint. All other degree angle scales 10 °, 30
°, 40 °, and 45 ° are circularly displayed as normal inclination angle display marks without any conductive function.

Therefore, in this case, the pointer float 1
When the needle terminal 15b on the fifth side comes into contact with the circular conductive material 40 indicating the degree angle scale 20, the alarm signal is turned on by the electric signal. When the circuit is turned on, the alarm bell 20 of the alarm means sounds and the patrol light illumination lamp 2
1 turns on. When the operator recognizes such a warning, the backhoe will tilt further left and right in that direction,
It is possible to quickly detect the danger of rollover and prevent a fall accident before it occurs.

[0040]

As described above, the float-type inclinometer according to the present invention has a simple structure and can detect a tilt angle with high accuracy without being affected by disturbance. It is ideal for use in underwater working machines used in harsh environments with poor visibility and satisfies robust and high-precision conditions, and is effective in preventing rollover of the machine.

[Brief description of the drawings]

FIG. 1 is an external side view showing an example in which an embodiment of a float-type inclinometer according to the present invention is mounted on a backhoe of an underwater working machine.

FIG. 2 is an external plan view thereof.

FIG. 3 is an external front view thereof.

FIG. 4 is an assembled vertical sectional view showing a single unit of the float-type inclinometer device of the present embodiment.

FIG. 5 is an assembly plan view thereof.

FIG. 6 is a plan view schematically showing each degree angle scale and a conductive region in a degree scale display panel of a main part according to the first embodiment.

FIG. 7 is an external side view showing a state in which the backhoe is inclined in a climbing direction.

FIG. 8 is an external front view showing a state in which the backhoe is tilted in the left-right direction.

FIG. 9 is an assembled vertical sectional view showing a state where the float-type inclinometer device according to the first embodiment is tilted in FIG.

FIG. 10 is an assembled plan view thereof.

FIG. 11 is a plan view schematically showing a division angle scale and a case where they are formed of a conductive material as a second embodiment.

FIG. 12 is a plan view schematically showing a case in which only a specific angle scale of 20 ° among the degree angle scales is formed of a conductive material as a third embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 inclinometer device 2 backhoe of underwater working machine 10 device body case 11 case body 12 minute scale display panel 13 conductive foil body (conductive area) 14 damper oil (damper fluid) 15 pointer float 15 a float 15 b needle terminal 15 c Rod for rechargeable battery 16 Rechargeable battery power supply 17 Power supply circuit wiring 20 Alarm bell (alarm means) 21 Patlite type lamp which also serves as illumination for minute scales 30 to 34 Concentric conductive material indicating each minute angle scale 40 Limit inclination angle 20 ° Conductive material that shows a degree angle scale

Claims (10)

[Claims] 1. An apparatus body case formed in a closed cylindrical shape, and a transparent hemisphere provided on an upper part of the apparatus body case in a vertical direction, and a diopter scale provided in a concentric circle in all directions from a pole of the sphere. A degree scale display panel on which at least a specific angle scale of these degree scales is formed conductive; and an upper portion of the apparatus body case including the inside of the degree scale display panel filled and sealed. A damper fluid having a required viscosity and electrical insulation, and a base end of a float floated and immersed in the damper fluid by buoyancy are hinged, and a needle terminal made of a conductive material provided at a tip end of the float is provided. When contacting the specific angle scale of the minute scale display panel, and a pointer float that is electrically conductive, stored in an enclosed space partitioned inside the device body case,
An alarm means for generating at least one of an alarm sound and an alarm light-on signal when the needle float of the pointer float and the specific angle scale are electrically connected to each other, and stored in an enclosed space partitioned inside the device body case. ,
A power supply including a storage battery connected to the specific angle scale, the needle terminal and the alarm means to form a power supply circuit;
A float type inclinometer device comprising: 2. The float type inclinometer device according to claim 1, wherein an area area between the specific angle scale and the maximum angle scale of the minute scale is coated with a conductive material. 3. The float type inclinometer according to claim 1, wherein all of the minute scales including the specific angle scale are formed in a ring shape by a conductive material. 4. The float type inclination according to claim 1, wherein only the specific angle scale is formed in a ring shape by a conductive material, and the other division scales are displayed in a ring shape as display marks. Instrument. 5. The float type inclinometer according to claim 1, wherein the specific angle scale is set arbitrarily. 6. The float-type inclinometer device according to claim 5, wherein the specific angle scale indicates a tilt angle of 20 ° when the device main body case is tilted with respect to a vertical line. . 7. The float type inclinometer device according to claim 1, wherein the device main body case is formed with a sealing property and a water pressure resistance when used underwater. 8. The float-type inclinometer according to claim 7, wherein the float-type inclinometer is used by being mounted on an underwater working machine including a backhoe. 9. The float-type inclinometer device according to claim 8, wherein the specific angle scale indicates a limit tilt angle at which a warning is issued to prevent the underwater working machine from rolling over. 10. The warning indicating the limit tilt angle is recognized by an operator who has boarded the underwater work machine, or can be taken out as an alarm electric signal when the underwater work machine is operated by a remote controller on the surface. The float type inclinometer device according to claim 9, wherein