JP2000213938A - Laser beam irradiation device, and adapter and holder used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately conduct in a short time an indication of a direction for a connecting piping when a mutual distance between connected pipings is long, and measurement for a center-to-center dimension of the connected pipings, using long rectilinearity of a laser beam. SOLUTION: This device is provided with a laser beam generating part 8 for emitting a laser beam unidirectionally from a cross-sectional circle center of a cylindrical hollow body 6, a reference part 6a for detecting a laser beam irradiating direction, and an engaging part 2 concentric with the laser beam, and is fitted into a fitting by the engaging part 2. An extending direction of a connecting pipe is indicated in this case by bringing an instrument such as a slope measuring device or a level into contact with the reference part 6a to regulate the laser beam irradiating direction. A center-to-center dimension of mutual connected pipings is measured using the laser beam as a reference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser beam irradiating apparatus used for determining a distance and an angle in construction work and plumbing work, and an adapter and a holder used for the same.

[0002]

2. Description of the Related Art Conventionally, when determining a distance or an angle in a construction work, a plumbing work, or the like, a horizontal line is obtained by stretching a thread horizontally, or a vertical line is obtained by using a plumb bob. A method of calculating a distance, an angle, and the like from a result measured by a scale or the like is often used.

[0003] As an example of this, FIG. 14 is an explanatory view of a method of measuring the distance between connected pipes in a conventional pipe construction. In piping work, when predicting the direction of a connecting pipe to be connected and measuring the core-to-core dimensions of the connected pipes, when the distance between the connected pipes 81 and 82 is short, as shown in FIG. Instead of a connecting pipe (not shown) to be connected, a temporary pipe 84 having a threaded portion 83 formed by threading one end of a pipe cut to an appropriate length to a connected pipe 81 is tightened. The connection pipes 81 and 82 are measured with respect to the temporary pipe 84 as a reference.

[0004]

However, when the distance between the connected pipes 81 and 82 is long, it is extremely difficult to predict the direction of the connected pipe by the temporary pipe 84 and to measure the core-to-core dimension between the connected pipes. It is not realistic to make a long temporary tube,
Use temporary pipes of appropriate length as a guide or measure and calculate based on reliable parts of the building, all of which are economical, time-consuming and labor-intensive. The burden is large and inaccuracy remains.

Further, since the temporary pipe 84 is formed to have an appropriate length according to the condition of use, it is difficult to handle and requires attention. For this reason, the screws may be damaged by dropping or colliding during use, or may be accidentally discarded or lost during construction, and must be rebuilt many times. In some cases.

[0006] These problems are not limited to the plumbing work, but also at the time of determining the distance and the angle, etc., which are also performed in the construction work, etc., the thread is stretched horizontally to obtain a horizontal line, or the vertical line is formed using a plumb bob. If a method of calculating a distance, an angle, or the like from a result measured by a scale or the like based on the above is used, economic, time, and labor burdens are similarly increased. In addition, if a thread is stretched or a down swing is used for a long distance, the measurement result may be inaccurate due to slack of the thread or the like.

Therefore, the present invention utilizes the long-distance rectilinearity of a laser beam to accurately and shortly indicate the direction of a connecting pipe when the distance between the connecting pipes is long and measure the core-to-core dimension between the connecting pipes. It is an object of the present invention to be able to perform the measurement in time, and to obtain a horizontal line and a vertical line as a reference for measuring a distance and an angle accurately and in a short time.

[0008]

A laser beam irradiation apparatus according to the present invention includes a laser beam generator for irradiating a laser beam, a reference portion for detecting a direction of laser beam irradiation, and a fitting concentric with the laser beam. And a part.

According to such a laser beam irradiation apparatus,
When a laser beam is radiated by fitting into one of the connected pipes instead of the connecting pipe to be connected from now on, the irradiation direction of the laser beam will be changed to the connected pipe fitted by the concentric fitting section. Since the center direction of the connection tube to be connected is coincident with the center direction of the connection tube, the center direction of the connection tube can be indicated by this laser beam.

Further, a gradiometer or a level is brought into contact with a reference portion for detecting the irradiation direction of the laser beam to detect the irradiation direction of the laser beam, and based on the detection result, the irradiation direction of the laser beam is determined. By adjusting and measuring the distance between the other connected pipe and this laser beam, it is possible to measure the core-to-core dimensions of the connected pipes to be connected accurately and in a short time due to the laser beam's distant rectilinearity. Becomes

It is desirable that the laser beam irradiation apparatus of the present invention further includes a tool holding portion for holding a tool for rotating a fitting portion to be fitted into the connected pipe. If the tool holder is set to an outer shape such as a hexagon or an octagon, it can be rotated using a tool such as a commercially available wrench or spanner, so that the laser beam irradiation device of the present invention is rotated to the connected pipe. It is possible to easily fix it by inserting it.
In addition, it is possible to easily remove it at the time of removal.

By the way, the adapter of the present invention is provided with a suspending body which is fitted into the fitting portion of the laser beam irradiating apparatus of the present invention to keep the direction of laser beam irradiation vertical.
Such an adapter can be easily fitted and attached to the fitting portion of the laser beam irradiation device of the present invention, and when one of the hanging members is mounted on a ceiling, a high place, or the like, the laser beam is illuminated by its own weight. The irradiation direction of the light beam is vertical. Therefore, by applying the laser beam irradiation apparatus of the present invention, even if the height is too high to use the down swing, the laser beam can be easily irradiated to obtain the vertical line accurately and in a short time. It becomes possible.

Here, as a suspended body, a fishing line, a string, a fine wire, a piano wire, or the like can be used as long as the laser beam emitted from the laser beam generating section by the weight of the laser beam irradiating device becomes vertical. Good.

On the other hand, the holder of the present invention has a vertical holding mechanism for holding the laser beam irradiation device vertically. By providing a vertical holding mechanism for holding the laser beam irradiation device vertically by its own weight, the laser beam can be irradiated vertically upward.
Therefore, applying the laser beam irradiation device of the present invention,
A vertical line can be obtained accurately and in a short time by simply irradiating a laser beam vertically upward.

Further, another adapter of the present invention is provided with a prism for refracting the laser beam irradiated from the laser beam generating section of the laser beam irradiating apparatus of the present invention by 90 °. When an adapter having such a prism is mounted on a laser beam irradiation device, it becomes possible to refract a laser beam emitted from a laser beam generator concentric with the fitting portion by 90 ° and irradiate the laser beam. Also, when used together with the above-mentioned adapter having the hanging body of the present invention or a holder having a vertical holding mechanism, the laser beam emitted from the laser beam generator of the laser beam irradiation apparatus of the present invention can be easily leveled. This makes it possible to obtain a horizontal line accurately and in a short time even if the distance is too long to obtain a horizontal line by stretching the yarn horizontally.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 is a sectional view of a laser beam irradiation device L ₀ in the embodiment of the present invention,
Figure 2 is a diagram showing details of the rear end portion lid of the laser beam irradiation device L ₀ shown in FIG. 1, (a) is a side view, (b) is a front view. Hereinafter, the laser beam irradiation device L ₀ shown in FIG.
The right end is described as a front end, and the left end is described as a rear end.

The laser beam irradiation device L _{0 according to} the embodiment of the present invention is mainly fixed to the tip of the cylindrical hollow body 6 and irradiates the laser beam in one direction from the center of the cross-sectional circle of the hollow body 6. It comprises a laser beam generating section 8 and a fitting section 2 which is provided at the rear end of the hollow body 6 and which can be fitted into a pipe joint or the like connected to the tip of a connected pipe. In addition,
The center of the fitting section 2 in the fitting direction is the laser beam generating section 8.
Are concentric with the irradiation direction of the laser beam emitted from the light source. Further, in the present embodiment, the fitting portion 2 can be fitted by screwing it into a pipe joint or the like as a male screw.

The outer peripheral surface of the hollow main body 6 serves as a reference portion 6a for use as a reference for instruments such as a gradiometer and a level for detecting the irradiation direction of the laser beam. It is formed so as to be parallel to the direction. By arranging a gradiometer, a level, or the like on the outer surface of the hollow body 6 in parallel with the irradiation direction of the laser beam, the irradiation direction of the laser beam can be measured. The hollow main body 6 is not limited to a cylindrical shape, but may have a polygonal column shape or another shape, and a reference portion may be separately provided on an outer surface thereof.

The laser beam generator 8 at the tip of the hollow body 6
A lid 9 having a small hole 10 for radiation is attached to the end of the lid 9. The lid 9 and the hollow main body 6 are connected to a female screw formed on the lid 9 and a distal end of the hollow main body 6. It can be attached and detached by a male screw.

The fitting portion 2 at the rear end of the hollow main body 6 is used to irradiate a laser beam from a tool holder 3a and a laser beam generator 8 for holding a tool for rotating the fitting portion 2 as shown in FIG. It is formed as a male screw on a separately manufactured unit 3 having a switch mechanism 5 for turning on / off. The external shape of the tool holder 3a is a hexagonal nut-like shape, and can be rotated using a commercially available tool such as a wrench or a spanner. The switch mechanism 5 is externally operated by a push button 1 provided through the unit 3. The switch mechanism 5 can be operated more. The unit 3 further includes a main body connection portion 4 formed as a male screw, and is detachably mounted by being screwed into a female screw formed at the rear end of the hollow main body 6.

[0021] Thus, in the laser beam irradiation device L ₀ in the embodiment of the present invention, the cover 9 and the rear end of the tip portion of the laser beam irradiation device L ₀ most damaged easily during the fall or collision Since the unit 3 is detachable and made separately, even if it is damaged, only the lid 9 or the unit 3 needs to be replaced as a part, so that maintenance management becomes easy.

The laser beam irradiator L _{0 having} such a configuration is provided.
The user removes the unit 3 at the rear end of the hollow main body 6, inserts the battery 7, and attaches the unit 3 to the rear end of the hollow main body 6. At this time, the tool hook 3 provided in the unit 3
Since the unit 3 can be easily rotated by using a spanner or the like and screwed into the hollow main body 6 according to a, the battery 7 can be easily replaced. When the push button 1 is pressed from the outside of the unit 3, a laser beam is emitted from the emission small hole 10 at the tip of the hollow body 6.

Next, a description will be given of a method using a laser beam irradiation device L ₀ in the embodiment of the present invention. Figure 3 is an explanatory diagram showing a use state of the laser beam irradiation device L ₀ in the embodiment of the present invention. Here, a description will be given of a case where the connection pipe 12a as a connection source and the connection pipe 12b as a connection destination are located far apart, and a case where these two connection pipes 12a and 12b are connected.

The laser beam irradiator L ₀ is a push button 1
Press to leave the laser beam 14 irradiated,
The laser beam irradiation device L ₀ the connection pipe 12a, 12
b, a pipe joint 1 connected to the tip of one connected pipe 12a
It is screwed into 1a by the fitting portion 2. At this time, unit 3
Can be screwed to the pipe joint 11a readily rotate the laser beam irradiation device L ₀ using a wrench or the like by a tool hook 3a provided in. Then, the reference portion 6a of the hollow body 6
The pipe joint 11a is adjusted so that the level is brought into contact with and level.

If the level is adjusted with reference to the reference portion 6a parallel to the irradiation direction of the laser beam 14, the laser beam 14 radiated far and travels straight also becomes horizontal. (Not shown) can be horizontal. In addition, since the laser beam 14 indicates the extension direction of the connection pipe connected far away,
If the distance from the point A to the center point B of the other connected pipe is measured based on the laser beam, the distance between A and B is equal to that of the pipe joint 11a at the tip of the connected pipe 12a to be connected. It is possible to measure the core-to-core dimensions of the connected pipes 12b accurately and in a short time.

That is, due to the long rectilinearity of the laser beam, even if the distance between the connected pipes is too long to use the conventional method using a temporary pipe, the distance can be easily and accurately determined in a short time. in it is possible to measure, the laser beam irradiation device L ₀ as compared with conventional appropriate length tentative tube as it becomes possible to shorten the handling even simpler construction period because it shorter.

Then, according to the distance between A and B measured in this way, a connection pipe (not shown) that is to be connected to the pipe joint 11a at the tip of the connection pipe 12a is connected to the connection pipe 12b.
Of the connecting pipe (not shown) to be connected to the pipe joint 11b at the end of the pipe.

FIG. 4 is a view showing another use state of the laser beam irradiation device L _{0 according to} the embodiment of the present invention.
(A) is an explanatory view when a connecting pipe to be connected needs a gradient, and (b) is an explanatory view when there is a change in a skeleton supporting the connecting pipe to be connected.

As shown in FIG. 4 (a), when connecting a pipe to the end of a connected pipe 20 supported by a hanging hardware 22 suspended by a suspending rod 23 from an insert 24 provided on a ceiling 21. A slope is required for a connecting pipe (not shown) to be connected to the connected pipe 20, and a hanging rod (not shown) for hanging a metal fitting (not shown) of the connecting pipe from an insert 24 provided on a ceiling 21. To know the length of the pipe joint 2 (not shown),
0a is irradiated with a laser beam B ₀ by screwing a laser beam irradiation device L ₀ in the embodiment of the present invention, to direct the direction of the pipe path of the connecting tube by the laser beam B _0.

[0030] Then, the hanging bars by the distance from the insert 24 of the points for suspending the (not shown) until the laser beam B ₀ is measured using the measure 25, the connection to be connected from the insert 24 of the respective points Since the distance to the pipe can be known, a hanging rod (not shown) can be used without performing complicated calculations from the inclination angle of the connecting pipe to be connected.
Can be calculated.

On the other hand, as shown in FIG. 4B, frames 26a, 26b, 26 for supporting a connecting pipe (not shown) to be connected to a pipe joint 20a connected to the connected pipe 20.
even when the c there is a change, as in the case of FIG. 4 (a), that each skeleton 26a, 26b, the distance from the insert 24 of 26c to the laser beam B ₀ is measured using the measure 25 Thus, the dimensions of the hanging bar 23 at each point can be calculated.

[0032] Thus, fire pipe using a laser beam irradiation device L ₀ in the embodiment of the present invention, to it black support ironmongery from the ceiling in the plumbing of hot and cold water piping and the air conditioning piping, or wall support This makes it possible to easily perform inking of hardware in a short time. It is also possible to determine an obstacle on the connection path of the connection pipe to be connected by the laser beam.

The laser beam irradiation apparatus according to the embodiment of the present invention can be used alone as described above. However, when a plurality of the laser beam irradiation apparatuses are used simultaneously, more efficient work can be performed. Becomes possible. FIG. 5 is an explanatory diagram showing a use state when two laser beam irradiation apparatuses according to the embodiment of the present invention are used.

As shown in FIG. 5, when the distance between the connected pipes 32a and 32b to be connected is long and the height is different, the pipe joint 31 of each connected pipe 32a and 32b is connected.
The laser beam irradiators L ₁ and L ₂ that irradiate the laser beams to a and 31b are screwed in, and the laser beams B ₁ and B ₂ are adjusted using a level or the like so that the laser beams B ₁ and B ₂ are horizontal. Then, by measuring the length of the perpendicular between these laser beams B ₁ and B ₂ , the core length (C−C) of the connected pipes 32 a and 32 b can be obtained.
(Distance between points D) can be calculated, and the length of the pipe in the vertical portion necessary for the pipe route can be known.

Further, as shown by the dotted lines in FIG. 5, the laser beam irradiators L ₁ and L ₂ are connected to the respective laser beams B ₁ and B 2.
_{When the} pipe joints 31a and 31b are moved and adjusted so that the _two cross each other, it becomes possible to know the length of the remaining pipes necessary for the pipe path. That is, the laser beam irradiation device L ₁ is intact, the laser beam B the laser beam irradiation device L _2
1 by B ₂ is adjusted so as to intersect, it is possible to measure the distance from point C to the center of the connection pipe 32a, it is possible to know the one length of the remaining pipe. Similarly, if the reverse procedure is performed, the length of one remaining pipe can be known, so that it is not necessary to perform cumbersome calculations or to measure one pipe at a time on site.

The fitting portion 2 of the laser beam irradiation apparatus according to the embodiment of the present invention is formed in accordance with a pipe having a diameter of 15A or 20A which is often used in piping work or the like. In order to connect to a different adapter, a different diameter adapter as shown in FIGS. 6 and 7 can be used. FIG. 6 is a cross-sectional view of a different-diameter adapter used by being fitted into the fitting portion 2 of the laser beam irradiation device shown in FIG.
FIG. 7 is an explanatory view showing a use state of the different diameter adapter shown in FIG. 6.

As shown in FIG. 6, the different diameter adapter 41 is
A female screw portion 42 screwed to the fitting portion 2 of the laser beam irradiation device L _0, 25A, and a male screw portion 43 formed in accordance with the diameter of the predetermined piping, such as 32A and 40A. The female screw portion 42 and the male screw portion 43 are formed so as to be concentric. By preparing such a different diameter adapter 41 and screwing it into a connected pipe 44 having a predetermined diameter as shown in FIG.
It is possible to easily cope with pipes of other various diameters simply by replacing the pipe 1.

(Embodiment 2) FIG. 8 is a sectional view of a laser beam irradiation apparatus according to another embodiment of the present invention. The laser beam irradiation device according to the second embodiment mainly differs from the laser beam irradiation device according to the first embodiment shown in FIG.

As shown in FIG. 8, the laser beam irradiation apparatus according to the second embodiment has a reference portion 6 similar to that of the first embodiment.
a hollow body 51 having a strong magnet 53 at the rear end and a unit 52 having a fitting portion 2 detachable by the magnet 53. The rear end of the hollow main body 51 is formed as a convex portion 54a, and one of the units 52 is formed with a concave portion 54b to be fitted with the convex portion 54a. I try not to.

A cap 57 is provided on the convex portion 54a of the hollow body 51. The cap 57 is attached and detached to replace the battery 7, and ON / OFF of laser beam irradiation is provided at a rear portion of the laser beam generator 8. This is performed by the switch mechanism 56. The switch mechanism 56 has a built-in timer circuit, and has a function of simply turning on / off the laser beam irradiation and a function of automatically turning off the switch after a set time has elapsed since the switch was turned on.

In the laser beam irradiation apparatus shown in the first embodiment, the whole apparatus is mounted and removed by directly screwing the entire apparatus into the pipe joint.
Due to the nature of the screw, it may fall out of hand when it is out of place. Therefore, in the laser beam irradiation device of the second embodiment, first, the unit 52 is screwed into the pipe joint and attached, and then the laser beam irradiation device on the hollow body 51 side is attached by the magnet 53. on the other hand,
At the time of removal, first, the laser beam irradiation device on the hollow main body 51 side is removed, and then the unit 53 is twisted and removed. Thereby, it is possible to prevent the laser beam irradiation device on the hollow body 51 from accidentally dropping when being attached to or detached from the pipe joint.

Further, in the laser beam irradiation device according to the second embodiment, shock absorbing covers 55a and 55b are attached to the outer peripheral portion and the tip portion of the maximum diameter of the hollow main body 51, respectively. Also, the impact is not transmitted directly to the hollow body 51 or the inside thereof.

(Embodiment 3) FIGS. 9A and 9B are diagrams showing details of an adapter provided with a hanging body to be fitted into a fitting portion of a laser beam irradiation apparatus, wherein FIG. 9A is a side sectional view, and FIG.
FIG. 10 is a plan view, and FIG. 10 is an explanatory view showing a use state of the adapter shown in FIG.

The adapter according to the third embodiment, in the adapter body 61, a female screw portion 62 screwed to the fitting portion 2 of the laser beam irradiation device L _0, hanging member for hanging attached to a ceiling or a high place or the like And a take-up portion 64 from which the 63 can be pulled out and returned. The drawing hole 65 of the suspension 63 is formed so as to be concentric with the center of the female screw portion 62.

[0045] As shown in FIG. 10, such an adapter is capable of mounting in easily screwed into the fitting portion 2 of the laser beam irradiation device L _0, dangle Attach one hanging member 63 to the high place And the laser beam irradiation device L ₀
Irradiating direction of the laser beam B ₀ is vertically by its own weight. Therefore, even if the use of the plumb bob is such that its height is too high, it is possible to obtain accurate and in a short time easily vertical line by using a laser beam irradiation device L _0.

(Embodiment 4) FIG. 11 is an explanatory view of a holder used in a laser beam irradiation apparatus, and FIG. 12 is a view showing details of a vertical holding mechanism of the holder shown in FIG. FIG. 13B is a cross-sectional plan view, FIG. 13B is a cross-sectional side view, and FIG. 13 is a cross-sectional view of an adapter having a prism used in a laser beam irradiation device.

The retainer 71 in the fourth embodiment, the vertical holding mechanism 73 for holding the laser beam irradiation device L ₀ vertically
And legs 72 for supporting the vertical holding mechanism 73. Vertical holding mechanism 73 includes a gripper 74 for gripping the leading end portion of the hollow body 6 to the laser beam emitted from the laser beam irradiation device L ₀ upward, gripping portion 74
Support 75 provided with a bearing 75a for rotatably supporting the shaft 75
And a shaft support 76 having a bearing 76a for rotatably supporting the shaft support 75.

[0048] When to hold the laser beam irradiation device L ₀ on such holder 71, by a vertical retaining mechanism 73 provided with two shaft support 75 and 76, the laser beam irradiation device L ₀
Becomes vertical by its own weight, it is possible to irradiate the laser beam B ₀ vertically upward. Therefore, it is possible to easily obtain a vertical line accurately and in a short time. In this case, mounting an adapter according to the third embodiment in the fitting portion 2 of the laser beam irradiation device L _0, swing down to the hanging member 63 6
By attaching 6, a more accurate vertical line can be obtained.

[0049] Further, before the laser beam emitted from the laser beam generating portion 8 of the laser beam irradiation device L ₀ which has thus retained in the retainer 71, the adapter comprising a prism 77 as shown in FIG. 13 78 Can also be attached.
This prism 77 refracts a laser beam by 90 °, and an adapter 78 having such a prism 77 is provided.
Is mounted on the laser beam irradiation device L ₀ , the laser beam B ₀ emitted from the laser beam generator 8 concentrically with the fitting portion 2.
Is refracted by 90 ° to irradiate the laser beam B _H horizontally.
Can be easily obtained. Therefore, even when the distance is too long to obtain a horizontal line by stretching the yarn horizontally, the horizontal line can be obtained accurately and in a short time. Also,
If the adapter 78 can be rotated by 360 ° about the vertical axis, it is possible to change the direction of the laser beam _BH simply by rotating the adapter 78.

[0050]

According to the present invention, the following effects can be obtained.

(1) The fitting portion is easily fitted into the pipe to be connected by a laser beam irradiation device having a reference portion for detecting the irradiation direction of the laser beam and a fitting portion concentric with the laser beam. Since it is possible to irradiate the laser beam in the same direction as the core direction of the connection pipe to be connected, the laser beam can indicate the core direction of the connection pipe. Further, by adjusting the irradiation direction of the laser beam with reference to the reference portion and measuring the distance between the connected pipes with reference to the laser beam, it is possible to accurately and quickly connect the tubes by the long straightness of the laser beam. It is possible to measure the core-to-core dimensions of the connecting pipes. Therefore, even when the distance between the connected pipes is long, it is possible to easily measure the distance accurately and in a short time, and the handling is simple and the construction period can be shortened.

(2) Further, by using a laser beam irradiating device provided with a tool hook for hooking a tool for rotating the fitting portion, it is possible to easily rotate the tool using a commercially available tool such as a wrench or a spanner. Therefore, attachment and detachment to and from the connected pipe can be performed easily and smoothly.

(3) When one of the suspended members is attached to a ceiling, a high place, or the like by an adapter which is attached to a fitting portion of the laser beam irradiation device and has a suspended member for keeping the irradiation direction of the laser beam vertical, the laser beam is irradiated. The irradiation direction of the laser beam becomes vertical due to the weight of the irradiation device, and even if the height is too high to use the plumb bob, the laser beam can be easily irradiated to obtain a vertical line accurately and in a short time. It becomes possible.

(4) The laser beam emitted from the laser beam generating unit is refracted by 90 ° concentrically with the fitting part by an adapter having a prism for refracting the laser beam emitted from the laser beam irradiating device by 90 °. When used together with the holder of the present invention, the laser beam emitted from the laser beam generator of the laser beam irradiation device of the present invention can be easily leveled. Even if the distance is too long to obtain a horizontal line by extending the horizontal line, it is possible to easily irradiate the laser beam and obtain the horizontal line accurately and in a short time.

(5) It is possible to irradiate a laser beam vertically upward by a holder provided with a vertical holding mechanism for vertically holding a laser beam irradiation device. By applying the laser beam irradiation device of the present invention, Even if the height is too high to use the down swing, it is possible to easily irradiate a laser beam and obtain a vertical line accurately and in a short time.

[Brief description of the drawings]

FIG. 1 is a sectional view of a laser beam irradiation device according to an embodiment of the present invention.

2A and 2B are diagrams showing details of a rear end cover of the laser beam irradiation device shown in FIG. 1, wherein FIG. 2A is a side view and FIG. 2B is a front view.

FIG. 3 is an explanatory diagram illustrating a use state of the laser beam irradiation device according to the embodiment of the present invention.

4A and 4B are diagrams showing another usage state of the laser beam irradiation device according to the embodiment of the present invention, wherein FIG. 4A is an explanatory diagram when a connecting pipe to be connected needs a gradient, and FIG.
FIG. 4 is an explanatory diagram in a case where there is a change in a skeleton supporting a connection pipe to be connected.

FIG. 5 is an explanatory diagram showing a use state when two laser beam irradiation apparatuses according to the embodiment of the present invention are used.

FIG. 6 is a cross-sectional view of a different-diameter adapter used by being fitted into a fitting portion of the laser beam irradiation device shown in FIG.

FIG. 7 is an explanatory view showing a use state of the different diameter adapter shown in FIG. 6;

FIG. 8 is a sectional view of a laser beam irradiation device according to another embodiment of the present invention.

FIG. 9 is a view showing details of an adapter having a suspension used by being fitted into a fitting portion of the laser beam irradiation device;
(A) is a side sectional view, and (b) is a plan view.

FIG. 10 is an explanatory diagram showing a use state of the adapter shown in FIG. 9;

FIG. 11 is an explanatory diagram of a holder used in the laser beam irradiation device.

12 is a view showing details of a vertical holding mechanism of the holder shown in FIG. 11, wherein (a) is a plan sectional view and (b) is a side sectional view.

FIG. 13 is a sectional view of an adapter including a prism used in a laser beam irradiation device.

FIG. 14 is an explanatory diagram of a method of measuring a distance between connected pipes in a conventional pipe construction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Push button 2 Fitting part 3 Unit 3a Tool holding part 4 Main body connection part 5 Switch mechanism 6 Hollow main body 6a Reference part 8 Laser beam generation part 9 Lid 10 Small emission hole 41 Different diameter adapter 42 Female screw part 43 Male screw part 51 Hollow body 52 Unit 53 Magnet 54a Convex part 54b Concave part 55a, 55b Shock absorbing cover 56 Switch mechanism 57 Cap 61 Adapter body 62 Female screw part 63 Hanging body 64 Winding part 65 Pull-out hole 66 Down swing 71 Holder 72 Leg 73 Vertical holding mechanism 74 Holder 75, 76 Shaft support 75a, 76b Bearing 77 Prism 78 Adapter

Claims (5)

[Claims] 1. A laser beam irradiation apparatus comprising: a laser beam generator for irradiating a laser beam; a reference unit for detecting an irradiation direction of the laser beam; and a fitting unit concentric with the laser beam. 2. A laser beam irradiation apparatus according to claim 1, further comprising a tool hook for hooking a tool for rotating said fitting section. 3. An adapter provided with a suspension body which is fitted into the fitting portion of the laser beam irradiation device according to claim 1 or 2 and keeps the irradiation direction of the laser beam vertical. 4. An adapter comprising a prism for refracting a laser beam irradiated from the laser beam irradiation device according to claim 1 by 90 °. 5. A holder provided with a vertical holding mechanism for holding the laser beam irradiation device according to claim 1 vertically.