JP3764909B2 - Float type inclinometer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a float-type inclinometer device, and more particularly to a float-type inclinometer device suitable for preventing rollover of a machine body such as a backhoe used for land and underwater construction.
[0002]
[Prior art]
In general, an inclinometer is used to measure the verticality and inclination angle of a structure, and the inclination angle of a moving object. Proposals have been made to apply various scientific principles, such as a gyro method that uses the inertia of a high-speed rotating body (rotary top), a downward pendulum method that uses the gravity of a weight, and a float method that uses the buoyancy of bubbles. Has been.
[0003]
For example, an inclinometer described in JP-A-62-277514, an omnidirectional inclinometer described in JP-A-60-252214, and a weight pendulum type are used for a gyro system. There are inclinometers described in JP-A-56-155808 and JP-A-8-14895, respectively. There is a well-known level in the float method using bubbles.
[0004]
In underwater work machines such as backhoes used for underwater construction on bridge piers and revetments, the boarding operator shows the workability of the aircraft's climbing ability, turning ability, etc. It is necessary to work safely.
[0005]
[Problems to be solved by the invention]
In the case of such an underwater work machine, an operator usually makes a judgment on the left and right inclination of the machine less sensibly than onshore work because of buoyancy and water pressure acting on the machine.
[0006]
In order to detect the omnidirectional inclination angle of the body of such an underwater work machine, when the inclinometer described in each of the above publications is mounted, the mechanism is complicated and the function is robust enough to withstand water pressure in water. It is difficult to say that it has the characteristics, and it is easily affected by disturbance caused by water pressure and vibration. Furthermore, none of the conventional examples satisfy the conditions for use in an underwater working machine, such as being almost impossible to use in a harsh working environment where there is no perspective, and are not practical.
[0007]
Accordingly, it is an object of the present invention to provide a float type inclinometer device that has a simple structure and can detect a tilt angle with high accuracy without being affected by disturbance.
[0008]
Another object of the present invention is to provide a float type inclinometer device that is optimal for use in underwater work machines that are used particularly in harsh environments, that satisfies the robust and high accuracy conditions, and is effective in preventing rollover of the aircraft. It is to provide.
[0009]
[Means for Solving the Problems]
The float type inclinometer of the present invention is a device main body case formed in a sealed cylindrical shape and a transparent hemispherical shape provided on the upper portion of the device main body case in the vertical direction. A degree scale is provided, and the scale of at least a specific angle of these scales is formed conductively, and the upper part of the apparatus main body case including the inside of the part scale display board is filled. A conductive material provided at the distal end of the float, the damper fluid having the required viscosity and electrical insulation and the base end of the float immersed in the damper fluid immersed in the damper fluid hinged When the needle terminal is in contact with a specific angle scale on the fraction scale display board, it is stored in a pointer float that is electrically conductive and a sealed space that divides the inside of the apparatus main body case. Needle end And alarm means for generating at least one signal of the alarm sound and the alarm light indicator when electrical conduction due to contact with the specific angle scale and,
A power supply including a storage battery that is stored in a sealed space partitioning the inside of the apparatus main body case and is connected to the specific angle scale, the needle terminal, and the alarm means to form a power supply circuit.
[0010]
In this case, it is possible to coat the area region between the specific angle scale and the maximum angle scale of the fraction scale with the conductive material, or to form all of the fraction scale including the specific angle scale in a ring shape with the conductive material. it can. Only a specific angle scale can be formed in a ring shape with a conductive material to allow an electrical signal to be taken out, and other fractional scales can be described as a display mark in a ring shape.
[0011]
The specific angle scale can be arbitrarily set, and can indicate, for example, an inclination angle of 20 ° when the apparatus main body case is inclined with respect to the vertical line.
[0012]
The specific angle scale can be set to an inclination angle when the apparatus main body case is inclined with respect to the vertical line, for example, 20 °.
[0013]
On the other hand, as well as using the main unit case on a land working machine, it is effective for use on an underwater working machine including a backhoe by forming it with a sealing property and water pressure resistance when used underwater. is there. In this case, the specific angle scale can be set in advance to 20 ° as the limit value of the inclination angle of the aircraft in order to prevent the aircraft from falling in the front-rear direction.
[0014]
Therefore, the operator on board the aircraft can tip the aircraft by checking it with an alarm signal or lighting display using an electrical signal, with 20 ° as the limit, regardless of the front, back, left or right tilt of the aircraft. It can be prevented.
[0015]
In the case of mounting on an underwater work machine, the specific angle scale of 20 ° can be recognized by an operator who has boarded the underwater work machine, and the underwater work machine is operated by a water remote control. It can be taken out as an alarm electric signal.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a float-type inclinometer according to the present invention will be described below in detail with reference to the drawings.
[0017]
1 to 3 are a side view, a plan view, and a front view showing an appearance of a backhoe 2 that is an underwater work machine equipped with the float-type inclinometer device 1 of the present embodiment.
[0018]
The backhoe 2 performs operations such as leveling by the operation of an operator who has boarded the operator chamber 5 at the bottom of the water by a bucket 4 attached to the tip of a work arm 3 that bends and stretches by hydraulic drive. It is also possible for a diving operator to work while receiving pressure from a support vessel or the like on the water with the pressure supply system 6 or to perform remote operation from the water with complete unmanned operation.
[0019]
4 and 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-resistant rigidity and sealability is cylindrical. A hemispherical dome-shaped fraction scale display panel 12 is provided on the top of the apparatus main body case 10 on the vertical line in the vertical direction, using a synthetic resin material such as transparent tempered glass or transparent acrylic.
[0020]
The fraction scale display panel 12 has a pole at the top of the dome, that is, a central vertical line of 0 °, and has an angle range of 10 °, 20 °, 30 °, 40 °, 45 ° up to 45 ° on the same axis. The divergence angle scales of 10 °, 20 °, 30 °, 40 °, and 45 ° of omnidirectional concentric circles indicating the respective angles are displayed. These fractional scales are written so that an operator in the operator room 5 can clearly see the above from the top.
[0021]
Further, as is apparent from the schematic diagram of FIG. 6, the conductive foil body 13 (shown by a chain line in the figure) covering the scale range from an angle of 20 ° to an angle of 45 ° along the spherical inner surface of the partial scale display board 12. Part) is adhesively bonded. Instead of the conductive foil body 13, a conductive paint may be applied to the inner surface of the sphere.
[0022]
Further, the inside of the apparatus main body case 10 including the upper part scale display panel 12 is a sealed space partitioned from the lower side by the upper partition plate 22. The sealed space is filled with a damper oil 14 which is a damper fluid according to the present invention having an appropriate viscosity and electrical insulation, such as acrylic oil.
[0023]
In the damper oil 14, a pointer float 15 is immersed and provided. The pointer float 15 is composed of a hollow sphere float 15a, a needle terminal 15b at a tip portion penetrating the center, and a rod 15c for securing the float 15a from buoyancy. The shape of the float 15a is not limited to the hollow sphere as shown in the figure, and can be an optimum shape for indicating an accurate inclination angle. The needle terminal 15b at the tip is formed of a suitable conductive material, and can be always pressed against and contacted with the inner surface of the hemispherical dome of the division scale display board 12 by buoyancy acting on the float 15a.
[0024]
Therefore, when the conductive foil body 13 provided on the inner surface of the sphere of the partial scale display board 12 and the needle terminal 15b on the pointer float 15 side move and come into contact with each other, an electrical signal can be taken out by electrical connection. ing.
[0025]
Further, the base end portion 15d of the rod 15c for floating support is hinged on the upper partition plate 22 so as to be rotatable in all directions of 360 ° from the vertical line. The hinge base end portion 15d is connected to a power source 16 by, for example, a rechargeable battery via a wiring 17.
[0026]
When the pointer float 15 having such a structure is immersed in the damper oil 14 having viscosity, the disturbance caused by mechanical vibration or the like from the backhoe body propagates to the pointer float 15 through the case body 11 by absorbing the vibration. To prevent.
[0027]
Here, the battery power source 16 is stored in a sealed space of the apparatus body case 10 partitioned by the lower partition plate 18. An alarm bell 20 which is an alarm means in the present invention is stored in a sealed space provided between the lower partition plate 18 and the middle partition plate 19 in the middle part. The alarm bell 20 is used to warn the operator that an alarm sound is generated when the body of the backhoe 2 is tilted further left and right. In addition, a sealed space is also provided between the middle partition plate 19 and the upper partition plate 22, and an illumination lamp 21 that constitutes alarm means together with the alarm bell 20 is arranged here as a so-called patrol light of a rotary type or the like. Yes. The illumination lamp 21 has a low visibility under water in the degree angle scales 10 °, 20 °, 30 °, 40 °, and 45 ° of the degree scale display panel 12 so that the operator can clearly see even in a dark environment. Illuminate from below.
[0028]
The alarm bell 20 and the illumination lamp 21 constituting such an alarm means are connected to the battery power source 16 through the respective wirings 17 to form an alarm circuit.
[0029]
More specifically, an alarm circuit can be formed by presetting, for example, an angle scale of 20 ° to a specific angle among the respective degree angle scales of 10 °, 20 °, 30 °, 40 °, and 45 °. When the specific angle of 20 ° is set, the conductive foil body 13 covers the entire region having a maximum angle of 45 ° exceeding the angle of 20 °.
[0030]
Therefore, according to the above configuration, the present embodiment operates as follows. Of the angle scales 10 °, 20 °, 30 °, 40 °, and 45 ° displayed on the fraction scale display panel 12, the angle 20 ° is set in advance as a specific angle.
[0031]
As shown in FIGS. 7 and 8, in the bottom of the working water, there are many cases where the backhoe 2 is tilted forward in the uphill direction by an angle θ due to the ground shape of the bottom of the water or the slope of the surface to be constructed. In this case, the operator can work relatively safely in terms of sensation by means of an inclination angle display means indicating the climbing ability of the aircraft.
[0032]
As shown in FIG. 8, when the body of the backhoe 2 tilts to the left and right, the inclinometer device 1 on the body also tilts as shown in FIGS. When the tilt angle exceeds 20 ° which is the limit tilt angle set on the fraction scale display board 12, in the pointer float 15 inside the case body 11, the needle terminal 15b contacts the conductive foil body 13, and electrically When connected, the alarm circuit is turned on, and the alarm bell 20 is sounded.
[0033]
The operator recognizes that the alarm bell 20 is ringing and recognizes that there is a risk that the aircraft being operated will roll over, and may take measures to avoid the aircraft from rolling over by tilting further. it can.
[0034]
On the other hand, FIG. 11 is a plan view schematically showing the fraction scale display board 12 on the upper part of the second embodiment of the float-type inclinometer device 1.
[0035]
In this case, instead of the conductive foil body 13 shown in the first embodiment of FIG. 6, all the angle scales of 10 °, 20 °, 30 °, 40 °, and 45 ° of concentric circles are formed by the conductive materials 30 to 34. It is formed in a circle or is displayed in a circle by conductive paint.
[0036]
Therefore, when the needle terminal 15b on the pointer float 15 side contacts any one of the 10 °, 20 °, 30 °, 40 °, and 45 ° scales, an electrical signal corresponding to the inclination angle can be taken out. . Of course, it is also possible to provide a circuit in which any one of the division angle scales is set to a specific angle in advance. Actually, the inclination angle of 10 ° in the above-mentioned fractional angle scale is slight as an angle that the backhoe 2 rolls over from experience, and is hardly a problem. In this embodiment, even when the angle is 10 °, the conductive material 30 is used to detect an electric signal.
[0037]
On the other hand, FIG. 12 is a plan view schematically showing the third embodiment of the fraction scale display board 12.
[0038]
Also in this case, instead of the conductive foil body 13 shown in the first embodiment of FIG. 6, the angle 20 ° among the concentric partial angle scales 10 °, 20 °, 30 °, 40 °, 45 °. Is defined in advance at a specific angle and formed in a circular shape with the conductive material 40, or is displayed in a circular shape with a conductive paint. All the other fraction angle scales 10 °, 30 °, 40 °, and 45 ° are displayed in a circle as normal inclination angle display marks without any conductive function.
[0039]
Therefore, in this case, when the needle terminal 15b on the pointer float 15 side contacts the circular conductive material 40 showing the fraction angle scale 20, the alarm circuit is turned on by the electrical signal. When the circuit is turned on, the alarm bell 20 of the alarm means sounds and the patrol-type illumination lamp 21 is turned on. An operator who recognizes such an alarm can quickly detect that there is a risk of rollover when the backhoe body tilts further in the left and right direction, and can prevent a fall accident.
[0040]
【The invention's effect】
As described above, the float type inclinometer device according to the present invention has a simple structure and can detect a tilt angle with high accuracy without being affected by disturbances. It is ideal for use in underwater work machines that are used in harsh environments, is robust and satisfies high-precision conditions, and is effective in preventing rollover of the aircraft.
[Brief description of the drawings]
FIG. 1 is an external side view showing an example in which an embodiment of a float type inclinometer device according to the present invention is mounted on a backhoe of an underwater work machine.
FIG. 2 is an external plan view thereof.
FIG. 3 is an external front view thereof.
FIG. 4 is an assembled longitudinal 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 main part scale display board as the first embodiment.
FIG. 7 is an external side view showing an inclined state of a backhoe in an uphill 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 longitudinal sectional view showing a state when the float-type inclinometer device according to the first embodiment is tilted in FIG. 8;
FIG. 10 is an assembly plan view thereof.
FIG. 11 is a plan view schematically showing a case where a degree angle scale and those formed of a conductive material are formed as a second embodiment.
FIG. 12 is a plan view schematically showing a case where only a specific angle scale of 20 ° is formed of a conductive material in a fractional angle scale as a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inclinometer apparatus 2 Backhoe of an underwater working machine 10 Apparatus body case 11 Case body 12 Minute scale display board 13 Conductive foil body (conductive area)
14 Damper oil (damper fluid)
15 Pointer float 15a Float 15b Needle terminal 15c Float locking rod 16 Rechargeable battery power supply 17 Power supply circuit wiring 20 Alarm bell (alarm means)
Patrite lamps 30 to 34 that also serve as 21-minute scale illumination Concentric conductive material 40 showing each fraction angle scale Conductive material showing a fraction angle scale with a limit inclination angle of 20 °

Claims (10)

An apparatus body case formed in a sealed cylindrical shape;
It is a transparent hemisphere provided in the upper part of the device body case in the vertical direction, and a division scale is provided on the omnidirectional concentric circle from the pole of the sphere, and the scale of at least a specific angle of these division scales is made conductive. The formed scale scale display board,
A damper fluid that fills and encloses the upper part of the apparatus main body case including the inside of the scale display panel, and has a required viscosity and electrical insulation;
When the base end of the float immersed in this damper fluid under buoyancy is hinged, and the needle terminal made of a conductive material provided at the distal end of the float comes into contact with a specific angle scale on the partial scale display panel A pointer float that is electrically conductive,
Alarm means stored in a sealed space partitioning the inside of the apparatus main body case and generating at least one signal of an alarm sound and an alarm lighting display at the time of electrical conduction by contact between the needle terminal of the pointer float and the specific angle scale; ,
A power source including a storage battery stored in a sealed space partitioning the inside of the apparatus main body case, connected to the specific angle scale, the needle terminal, and the alarm means to form a power circuit;
A float-type inclinometer device comprising: The float-type inclinometer device according to claim 1, wherein an area region between a specific angle scale and a maximum angle scale of the partial scale is coated with a conductive material. 2. The float type inclinometer device according to claim 1, wherein all of the fractional scales including the specific angle scale are formed in an annular shape from a conductive material. 2. The float type inclinometer device according to claim 1, wherein only the specific angle scale is formed in a ring shape with a conductive material, and the other fractional scales are indicated in a ring shape as display marks. The float type inclinometer device according to claim 1, wherein the specific angle scale is arbitrarily set. 6. The float type inclinometer device according to claim 5, wherein the specific angle scale indicates an inclination angle of 20 ° when the device main body case is inclined with respect to a vertical line. The float type inclinometer device according to any one of claims 1 to 6, wherein the device main body case is formed with a sealing property and a water pressure resistance when used in water. The float type inclinometer device according to claim 7, wherein the float type inclinometer device 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 inclination angle that warns in order to prevent a rollover of the underwater work machine. The warning indicating the limit inclination angle is recognized by an operator who has boarded the underwater work machine, or can be extracted as an alarm electric signal when the underwater work machine is operated by a water remote controller. The float type inclinometer device according to claim 9.

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