JPH06167338A - Method for fixing laser device into pipe body - Google Patents

Abstract

PURPOSE:To prevent the position deviation of a laser device by the elastic force of an elastic body and the friction force due to the elastic force by inserting the elastic body between a pipe body and a laser device installed in the pipe body. CONSTITUTION:A laser device 2 is inserted into a pipe body 1 and the device 2 is placed at the lower part on the inner-periphery surface of the pipe body 1. Then, a bag 7 which is made of an elastic body is inserted into a space which is formed at the upper side of the device 2 within the pipe body 1 and compressed air from the outside is filled into the bag 7 for inflating it, thus adhering the bag 7 to the upper part of the pipe body 1 and that of the device 2 with a specific contact pressure. Then, the play between the device 2 and the pipe body 1 is eliminated, thus preventing the device 2 from being floated from the inner-periphery surface of the pipe body 1 and then moving up and down, at the same time preventing the bag 7 and the device 2 from traveling along the inner-periphery surface of the pipe body 1 by friction force generated by inner pressure, and hence completely preventing position deviation of the device 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser device fixing method for fixing a laser device in a tube such as a soil pipe or a fume pipe which is buried in the soil.

[0002]

2. Description of the Related Art In modern cities, water, sewage,
Many kinds of buried pipes are laid in the soil to drain rainwater, sewage, etc., and to bury power transmission lines, communication lines, etc. in the soil. Whether these new pipes are newly installed or rehabilitated, water should flow smoothly inside, and subsequent road rehabilitation, laying of new buried pipes, construction or In order to prevent damage during civil engineering work, it is necessary to accurately position and bury it.

In recent years, as a method of positioning such a pipe, for example, as shown in a vertical side view of FIG. 3, a laser device 2 for emitting a laser beam is arranged at one end of the pipe body 1 to make the inside of the pipe body 1. A method of emitting a laser beam B to a target 3 provided at the other end of the laser beam and detecting the presence or absence of a positional deviation based on the presence or absence of a deviation of the laser beam B from the target 3 is drawing attention.

In this pipe positioning method, the laser device 2 is provided with a main body 2a and at least three legs 2b projecting from the main body 2a, as shown in FIG. 3 and FIG. Mounted directly on the bottom of the surface or through a bracket

Further, in this pipe positioning method, the backfilling sand 5 around the pipe body 1 is tamped by the tamping machine 4 such as a vibro plate or a tamping rammer at the time of backfilling. When the vibration of the compacting machine 4 is transmitted to the laser device 2, the laser device 2 resonates and the position of the laser device 2 may shift. Therefore, in order to prevent such a positional shift, the laser device 2 is placed inside the tube body 1. Need to be fixed.

For this reason, conventionally, as shown in the front view of FIG. 4, the fixing metal fitting 6 inserted between the upper portion of the inner peripheral surface of the tube body 1 and the main body 2a is extended to extend the inner peripheral surface of the tube body 1. The main body 2a is fixed so as not to move in the tubular body 1.

The fixing bracket 6 is fixed to the main body 2a so as to straddle the upper portion of the main body 2a, and a screw 6b fixed to the upper portion of the attachment frame 6a and protruding above the attachment frame 6a.
And a cap nut 6c screwed into the cap nut from above and a handle 6d for rotating the cap nut 6c. The cap nut 6c is rotated in the screwing direction to increase the distance from the mounting frame 6a. As a result, the head of the cap nut 6c is pressed against the upper portion of the inner peripheral surface of the tube body 1 to replenish the gap between the upper portion of the inner peripheral surface of the tube body 1 and the main body 2a.

[0008]

By the way, the natural frequencies of the tube body 1 and the laser device 2 are not usually the same, and the resonance frequency with respect to the vibration of the compacting machine 4 is naturally different. Therefore, relative vibration occurs between the tube body 1 and the laser device 2, and this vibration causes a fluctuating load in which the contact pressure of the fixing metal fitting 6 to the inner peripheral surface of the tube body 1 is repeatedly changed. There is a problem that the inner peripheral surface of the tube body 1 which is not crushed is broken and a gap is generated between the fixing metal fitting 6 and the inner peripheral surface of the tube body 1, so that the fixing action is lost.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for fixing a laser device in a tubular body which can fix the laser device in the tubular body without damaging the inner peripheral surface of the tubular body. To aim.

[0010]

In order to achieve the above object, the method for fixing a laser device in a tube according to the present invention inserts an elastic body between the tube and the laser device installed in the tube. A measure is taken to fix the laser device in the tubular body by the elastic force of the elastic body and the frictional force due to this elastic force.

The elastic body of the present invention replenishes the space between the inner peripheral surface of the tubular body and the laser device inserted therein, and contacts the inner peripheral surface of the tubular body and the laser device with an appropriate contact pressure. For example, an elastic body made of an elastic solid, an elastic body made of a expandable / contractible container and a compressive fluid enclosed therein, and at least a part made of an elastic solid An elastic body or the like made of a container that can be expanded and contracted and an incompressible fluid enclosed in the container is used.

Examples of the elastic solid include elastic metal such as steel, rubber, elastic synthetic resin, and the like.

The shape of the elastic solid is not particularly limited, and may be, for example, a plate shape, a coil shape, a ring shape, a tube shape, a cubic shape, a rectangular parallelepiped shape, a spherical shape, an elliptic spherical shape, a hemispherical shape, a semielliptic spherical shape. Examples thereof include various solid shapes, such as solid shapes, foam-containing sponge shapes, hollow shapes, and the like.

For example, taking a metal spring made of steel as an example, a compression coil spring, a torsion coil spring, a leaf spring,
Examples thereof include thin leaf springs, bamboo shoot springs, disc springs, ring springs, and the like.

Further, when rubber or synthetic resin having elasticity is formed in a hollow shape, since it becomes a container having expandability, it can be filled with a compressive fluid such as air and water inside. Alternatively, a non-compressible fluid such as oil may be filled. Further, the outer shape in this case is not particularly limited, for example, various rotating bodies such as bellows, sphere, ellipsoidal sphere, torus, hemisphere, and semielliptic sphere, and non-rotating bodies such as rectangular and cubic. Can be formed.

The expandable / contractible container of the present invention is not limited to one made entirely of an elastic solid such as rubber or elastic synthetic resin, but at least a part thereof made of an elastic solid. Alternatively, for example, a cylinder including two cylinders slidably fitted to each other or one cylinder and a piston slidably fitted in the cylinder is also included.

A container in which this cylinder is combined with rubber, an elastic synthetic resin or the like, for example, a rubber or an elastic synthetic resin or the like is provided between the cylinders forming the cylinders or between the cylinder and the viston. A container having an airtight seal with a diaphragm (for example, a diaphragm type air spring) is also included in the container having expandability.

When the compressive fluid is sealed in the expandable / contractible container, the method of applying the pressure (internal pressure of the container) to the compressive fluid is not particularly limited. In short, the internal pressure in the container before the backfilling is started. Should be given. For example,
Before inserting the container between the tube body and the laser device, a compressive fluid such as compressed air having a predetermined pressure may be sealed in the container in advance, and between the tube body and the laser device. The compressive fluid may be pressed into the container after the container is inserted.

At least a part of the expandable container is made of rubber, elastic synthetic resin, or the like, and when the incompressible fluid is enclosed inside, the method of applying pressure to the incompressible fluid is not particularly limited. Before inserting the container between the tube and the laser device, a non-compressible fluid that has been pressurized to a predetermined pressure may be sealed in the container beforehand. The container may be inserted into the container and then the incompressible fluid may be pressed into the container.

[0020]

[Operation] In the present invention, an elastic body is inserted between the tubular body and the laser device installed in the tubular body, and the elastic body is adhered to the inner peripheral surface of the tubular body and the laser device with a predetermined elastic force. By eliminating the gap between the laser device and the tube,
It is prevented that the laser device floats up and down from the inner peripheral surface of the tubular body in the tubular body and moves up and down, and also that the laser device and the elastic body are prevented from moving along the inner surface of the tubular body by the frictional force due to the internal pressure. It

Further, the relative vibration between the laser device and the tube is prevented from being absorbed by the elasticity of the elastic body, and the mechanical shock force is not repeatedly applied to the inner peripheral surface of the tube, and the laser device and the tube are prevented. The contact pressure acting on the tubular body can be reduced by distributing the forces acting on each other due to the relative vibration with the body to a wide area by the elastic body.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of fixing a laser device in a tube according to an embodiment of the present invention will be described below with reference to the front view of FIG.

A laser device 2 is provided in a tube body 1 buried in the soil.
Is inserted, and the laser device 2 is placed under the inner peripheral surface of the tube body 1. Then, the bag 7 made of an elastic body such as rubber or synthetic resin having elasticity is inserted into the space formed above the laser device 2 in the tubular body 1, and the bag 7 is filled with compressed air from the outside. The bag 7 is inflated, and the bag 7 is brought into close contact with the upper portion of the inner peripheral surface of the tubular body 1 and the upper portion of the laser device 2 with a predetermined contact pressure.

The bag 7 is provided with a joint 7a with a self-sealing valve in order to let compressed air in and out, and a simple foot-operated air pump is used as a device for pressurizing air into the bag 7. To be

When the bag 7 is brought into close contact with the upper portion of the inner peripheral surface of the tubular body 1 and the upper portion of the laser device 2 with a predetermined contact pressure, the play between the laser device 2 and the tubular body 1 is eliminated, and the laser Device 2
Is prevented from floating above the inner peripheral surface of the tubular body 1 and floating up and down, and the bag 7 and the laser device 2 are prevented from moving along the inner peripheral surface of the tubular body 1 due to the frictional force generated by the internal pressure. As a result, the displacement of the laser device 2 is completely prevented.

Further, the relative vibration between the laser device 2 and the tubular body 1 is prevented from being absorbed by the elasticity of the bag 7 and the mechanical impact force is repeatedly applied to the inner peripheral surface of the tubular body 1, and By increasing the contact area between the bag 7 and the inner peripheral surface of the tubular body 1, the forces acting on each other during relative vibration between the tubular body 1 and the laser device 2 are distributed over a wide range to the inner peripheral surface of the tubular body 1. The contact pressure of the tube body 1 can be reduced, and as a result, the inner peripheral surface of the tube body 1 is prevented from being crushed, and the position rubbing prevention effect of the bag is reduced by the crushing of the inner peripheral surface of the tube body 1. , Can be prevented from being lost.

In this embodiment, the bag 7 is the laser device 2.
Although it is inserted on the upper side of the laser device, instead of this, the bag 7 divided into two may be inserted on both lateral sides of the laser device 2, and one bag or three bags may be inserted. The divided bags 7 may be inserted into the upper side and both lateral sides of the laser device 2.

FIG. 2 is a front view showing a procedure of a method for fixing a laser device in a pipe body according to another embodiment of the present invention. In this embodiment, the laser device 2 is supported by a mounting bracket 8 and the pipe body is supported. Installed in 1.

In this case, it is possible to insert the bag 7 between the laser device 2 and the inner peripheral surface of the tubular body 1 to fix the laser device 2 directly in the tubular body 1, but in the present embodiment. Then, the bracket 8 is fixed in the tube body 1 by the bag 7, and the position of the laser device 2 can be adjusted after the bracket 8 is fixed in the tube body 1.

The other construction, operation and effect of this embodiment are the same as those of the above-mentioned one embodiment, and therefore their explanation is omitted to avoid duplication.

In each of the above-described embodiments, the shape and size of the bag 7 may be appropriately set in accordance with the inner diameter of the tubular body, the shape of the laser device 2 or the bracket 8. The internal pressure of the bag 7 may be empirically determined.

The method of applying the internal pressure to the bag 7 is not limited to the method of applying the bag 7 after the bag 7 is inserted between the laser device 2 and the tubular body 1, but the bag 7 is filled with air in advance. Store bag 7 in laser device 2
It may be inserted between the pipe body 1 and the pipe body 1.

Further, in each of the above embodiments, the bag 7 is made of an elastic body such as rubber or elastic synthetic resin, so that a compressive fluid other than air is, of course, contained therein.
An incompressible fluid such as water or oil, or an elastic solid such as rubber, sponge, or foam molding resin can be filled.

Further, instead of the bag 7, for example, FIG.
A leaf spring 9 made of metal, rubber, synthetic resin, or the like, which is bent in a "V" shape or a "U" shape as shown in FIG.
A compression coil spring 10 made of metal, synthetic resin or the like as shown in (b), a circular spring 11 made of metal, rubber, synthetic resin or the like as shown in FIG. 3 (c), and FIG. 3 (d). Waste shown, bellows 12 made of synthetic resin, etc., circular tube spring 13 made of metal, rubber, synthetic resin, etc. as shown in FIG. 3 (e), tennis as shown in FIG. 3 (f) A ball 14 such as a ball, an air cylinder 15 composed of a pair of metal tubular bodies 15a and 15b slidably fitted to each other as shown in FIG. 3 (g), as shown in FIG. 3 (h). It is also possible to use a diaphragm-type air spring 16 or the like in which the lower surface of a flat cylindrical body 16a with a lid is covered with a diaphragm 16b.

The present invention can be applied not only to the fixing of the laser device but also to the fixing method of the target in the tube body, which causes the same problem. Further, it can be applied not only when the pipe is buried horizontally or at a gentle slope close to horizontal, but also when it is buried vertically or at a steep slope close to it.

[0036]

As described above, according to the method of fixing the laser device to the tube body of the present invention, the displacement of the laser device is prevented by the elastic force of the elastic body and the frictional force due to the elastic force.

Further, since the relative vibration between the laser device and the tube is absorbed by the elasticity of the elastic body, the forces acting on each other with the vibration are dispersed over a wide range, and the contact pressure is lowered. Crushing of the inner surface of the body is reliably prevented,
There is no fear that the position fixing action of the elastic body will be impaired by the crushing of the inner peripheral surface of the tubular body.

[Brief description of drawings]

FIG. 1 is a front view illustrating a procedure of a method of the present invention.

FIG. 2 is a front view illustrating another procedure of the method of the present invention.

FIG. 3 is a vertical cross-sectional side view showing a backfilling operation of a tubular body which is the background of the present invention.

FIG. 4 is a perspective view of a conventional fixture.

[Explanation of symbols]

 1 Tubular Body 2 Laser Device 7 Bag 9 Leaf Spring 10 Compression Coil Spring 10 11 Circular Spring 12 Bellows 13 Cylindrical Spring 14 Ball 15 Air Cylinder 16 Diaphragm Air Spring

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[Procedure amendment]

[Submission date] June 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 is an explanatory diagram of an elastic body of the present invention.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

FIG. 4 shows the backfill work that is the background of the present invention.
It is a vertical side view shown .

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

FIG. 5 is a front view of a conventional fixture. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 13, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

FIG. 5 is a front view showing a conventional method.

Claims (4)

[Claims] 1. An elastic body is inserted between a tubular body and a laser device installed in the tubular body, and the laser device is fixed in the tubular body by an elastic force of the elastic body and a frictional force due to the elastic force. A method for fixing a laser device, comprising: 2. The laser device fixing method according to claim 1, wherein an elastic body made of an elastic solid is used. 3. The method for fixing a laser device according to claim 1, wherein an elastic body made of an expandable / contractible container and a compressive fluid sealed inside is used. 4. The laser apparatus fixing according to claim 1, wherein an elastic body is used, which comprises an expandable / contractible container at least a part of which is made of an elastic solid and an incompressible fluid enclosed in the container. Method.