CN112082536A

CN112082536A - Laser irradiation device

Info

Publication number: CN112082536A
Application number: CN202010540475.5A
Authority: CN
Inventors: 青木武夫
Original assignee: Topcon Corp
Current assignee: Topcon Corp
Priority date: 2019-06-14
Filing date: 2020-06-15
Publication date: 2020-12-15
Also published as: JP7457462B2; JP2020204484A

Abstract

The invention provides a laser irradiation device which ensures the operability of a holding part and enables an operator and the like to easily retrieve a device in a pipe. A laser irradiation device (2) is a laser irradiation device for setting a reference line when civil engineering is performed, and is provided with: a housing (21) having a substantially cylindrical shape and having, at one end (281), an inclined surface (211) inclined such that a normal line (N) extends obliquely upward in an installation state when a reference line is set; a laser oscillator (22) which is provided inside the housing (21) and has an emission unit (221) that emits a laser beam (L) toward a target and a light receiving unit (222) that receives a reflected laser beam reflected by the target; an operation unit (23) provided on the inclined surface (211); and a grip portion (24) connected to a lower end portion (234) of the operation portion (23) and extending from the lower end portion (234) along the normal line (N).

Description

Laser irradiation device

Technical Field

The present invention relates to a laser irradiation device for setting a reference line in civil engineering work.

Background

In civil engineering, a horizontal reference line or a reference line inclined at a desired angle with respect to the horizontal line is necessary. A laser reference level device is used as a means for setting such a reference line. For example, in a drainage work, when a concrete pipe is buried, the concrete pipe must be installed underground with a predetermined inclination and without being bent. If the concrete pipe to be embedded is meandering in the vertical direction or the horizontal direction, the liquid may be retained in the concrete pipe or may be blocked or leaked to the ground. In that case, the concrete pipe cannot function as a flow path. Therefore, when a concrete pipe is buried, it is necessary to set an appropriate reference line.

Laser light is suitable as such a reference line. Since the laser beam does not slacken like a line, the laser beam can reach a long distance in a straight line, and does not obstruct the work of burying the concrete pipe, and there is no risk of interference with the concrete pipe and cutting.

Patent document 1 discloses a laser reference level device including a laser irradiation device and a target. The laser irradiation device described in patent document 1 includes a cylindrical body portion. A laser oscillator is provided inside the housing of the main body, and the laser oscillator is provided so as to be capable of swinging in both the vertical direction and the horizontal direction. The laser oscillator irradiates laser beams in both the horizontal direction and the vertical direction, and detects a reflected laser beam reflected by a target from the laser beam emitted in the horizontal direction.

The rear side portion of the main body described in patent document 1 is provided with an inclined surface also provided with an operation panel. The operation panel is provided with various operation switches, a display unit, and the like. Since the display portion is provided on the inclined operation panel, an operator or the like can confirm the contents displayed on the display portion from the outside (upper side) of the vertical hole. A grip portion for gripping the laser irradiation device, such as a worker, is provided below the operation panel. The grip portion protrudes horizontally from a lower portion of the operation panel, thereby avoiding an obstacle for an operator or the like to confirm a display portion or the like provided on the operation panel.

Here, according to the findings obtained by the present inventors, the grip portion of the laser irradiation device is used not only for the operator or the like to grip the laser irradiation device, but also for the operator or the like to pull the cord to retrieve the laser irradiation device in the tube. For example, when a plurality of pipes are installed underground with a predetermined angle being given thereto, it is known that an operation of an operator or the like to retrieve the laser irradiation device inside the pipe is as follows: the grip portion is difficult to be hooked on, for example, a boundary portion of a plurality of tubes. As one method for facilitating the retrieval operation of the laser irradiation device in the pipe, there is a method of reducing the amount of protrusion of the grip portion in the horizontal direction. However, in such a case, it is difficult for an operator or the like to insert a hand into the grip portion, and there is a risk that the grip portion is difficult to grip. For example, in the laser irradiation device described in patent document 1, there is room for improvement in that the operability of the grip portion can be ensured and the retrieval operation of the device in the pipe can be easily performed by an operator or the like.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 9-257477

Disclosure of Invention

Technical problem to be solved by the invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laser irradiation device that enables an operator or the like to easily perform a retrieval operation of a device in a pipe while ensuring operability of a grip portion.

Means for solving the technical problem

The above-described object is achieved by a laser irradiation device according to the present invention for setting a reference line in civil engineering work, comprising: a housing having a substantially cylindrical shape and having an inclined surface at one end portion thereof, the inclined surface being inclined such that a normal line thereof extends obliquely upward in an installation state when the reference line is set; a laser oscillator device provided inside the housing and having an emitting unit that emits a laser beam toward a target and a light receiving unit that receives a reflected laser beam reflected by the target; an operating part arranged on the inclined surface; and a grip portion connected to a lower end portion of the operation portion and extending from the lower end portion along the normal line.

According to the laser irradiation device of the present invention, the housing has a substantially cylindrical shape and has an inclined surface at one end. In an installation state when the laser irradiation device sets the reference line, the inclined surface is inclined so that the normal line extends obliquely upward. An operation part is arranged on the inclined surface of the shell. The grip portion is connected to the lower end portion of the operation portion and extends from the lower end portion of the operation portion along a normal line of the inclined surface on which the operation portion is provided. Therefore, the grip portion does not cover the operation portion, and it is possible to avoid a situation in which an operator or the like is prevented from checking from outside (above) the vertical hole or operating the operation portion. Further, since the grip portion extends from the lower end portion of the operation portion along the normal line of the inclined surface, the grip portion can be easily gripped as compared with a case where the grip portion protrudes in the horizontal direction. This ensures the operability of the grip. Further, since the grip portion extends from the lower end portion of the operation portion along the normal line of the inclined surface, the amount of protrusion in the horizontal direction can be suppressed as compared with the case where the grip portion protrudes in the horizontal direction. Therefore, for example, when an operator or the like withdraws the laser irradiation device from the tube by attaching and pulling the rope to the grip portion, the grip portion can be prevented from being caught at a predetermined portion in the tube. This makes it possible for an operator or the like to easily perform the operation of retrieving the laser irradiation device inside the pipe.

In the laser irradiation device according to the present invention, it is preferable that the grip portions are connected to both end portions of the lower end portion when viewed along the central axis of the substantially cylindrical housing, and extend in an arc shape from one of the end portions within an inner range of the outer shape of the housing to reach the other of the end portions.

According to the laser irradiation device of the present invention, the grip portions are connected to both end portions of the lower end portion of the operation portion when viewed along the central axis of the substantially cylindrical housing, and extend from one of the end portions in an arc shape within the inner range of the outer shape of the housing to reach the other of the end portions. As described above, the grip portion extends from the lower end of the operation portion along the normal to the inclined surface. Therefore, the operator or the like can easily insert the hand into the space between the inclined surface of the housing and the grip portion, and can easily grip the grip portion. This ensures the operability of the grip. Further, since the grip portion extends in an arc shape within the inner range of the outer shape of the housing, the grip portion does not protrude outside the housing when viewed along the central axis of the substantially cylindrical housing. Therefore, for example, when an operator or the like withdraws the laser irradiation device from the tube by attaching and pulling the rope to the grip portion, the grip portion can be further prevented from being caught at a predetermined portion in the tube. This makes it possible for an operator or the like to further easily perform the operation of retrieving the laser irradiation device inside the pipe.

In the laser irradiation device according to the present invention, it is preferable that the housing further includes a recess portion which is provided on the opposite side of the operation portion when viewed from the center axis of the substantially cylindrical housing and in which an outer shape is retracted toward the center axis.

According to the laser irradiation device of the present invention, the recess portion, which is formed by retreating the outer shape toward the central axis of the substantially cylindrical housing, is provided on the opposite side of the operation portion when viewed from the central axis. Therefore, when the operator or the like grips the grip portion, the operator can place the thumb on the grip portion and place at least one of the index finger, the middle finger, the ring finger, and the small finger on the recessed portion. Thus, for example, the operator or the like can easily dispose the laser irradiation device in a pipe extending in a substantially horizontal direction through the longitudinal hole by turning the thumb placed on the grip portion with at least one of the index finger, the middle finger, the ring finger, and the small finger placed on the recessed portion as a fulcrum, and can easily place the laser irradiation device in an installation state when setting the reference line.

Preferably, the laser irradiation device according to the present invention further includes a power supply unit that is provided between the operation unit and the recess in the housing and supplies power to the laser oscillation device.

According to the laser irradiation device of the present invention, the power supply unit for supplying power to the laser oscillation device is provided between the operation unit and the recess in the housing. The power supply unit is relatively heavy among the components constituting the laser irradiation device. Therefore, the center of gravity of the laser irradiation device is located close to the operation unit and the recess, as compared with the case where the power supply unit is not provided between the operation unit and the recess. Thus, the operator or the like can easily lift the laser irradiation device while holding the grip portion, and transport the laser irradiation device or dispose it in the tube. For example, the operator or the like can easily carry the laser irradiation device or dispose it in the tube with one hand by placing the thumb on the grip portion and placing at least one of the index finger, the middle finger, the ring finger, and the small finger on the recessed portion.

In the laser irradiation device according to the present invention, it is preferable that the housing further includes flat portions which are provided on both sides of the operation portion and have a flat outer shape when viewed along a central axis of the substantially cylindrical housing.

According to the laser irradiation device of the present invention, the housing has the flat portion formed to have a flat outer shape. The flat portions are provided on both sides of the operation portion when viewed along the center axis of the substantially cylindrical housing. Therefore, for example, the operator can place the thumb on the flat portion provided on one of the two sides of the operation portion and place at least one of the index finger, the middle finger, the ring finger, and the pinky finger on the flat portion provided on the other of the two sides of the operation portion. Accordingly, the operator or the like can easily hold and transport the laser irradiation device with one hand by sandwiching the case between the thumb and at least one of the index finger, the middle finger, the ring finger, and the little finger. Further, since the flat portion has a flat outer shape, it is possible to suppress the adhesion and accumulation of mud and soil on the flat portion.

Effects of the invention

According to the present invention, it is possible to provide a laser irradiation device that enables an operator or the like to easily perform a retrieval operation of a device in a pipe while ensuring operability of a grip portion.

Drawings

Fig. 1 is a cross-sectional view for explaining an example of a civil engineering method using a laser irradiation device according to an embodiment of the present invention.

Fig. 2 is a perspective view of the laser irradiation device according to the present embodiment as viewed from the front side.

Fig. 3 is a perspective view of the laser irradiation device according to the present embodiment viewed from the rear side.

Fig. 4 is a side view of the laser irradiation device according to the present embodiment.

Fig. 5 is a front view of the laser irradiation device according to the present embodiment.

Fig. 6 is a plan view of the laser irradiation device according to the present embodiment.

Fig. 7 is a bottom view of the laser irradiation device according to the present embodiment.

Fig. 8 is a cross-sectional view illustrating a state in which the laser irradiation device according to the present embodiment is installed in a tube.

Description of the reference numerals

2 … laser irradiation device; a 3 … target; 21 … a housing; 22 … laser oscillation device; 23 … an operation part; 24 … a grip portion; 25 … a power supply section; 27 … feet; 41 … thumb; 42 … finger; 61 … concrete pipe; a 62 … land; 63 … longitudinal holes; 64 … burying groove; 65 … support table; 66 … theodolite; 211 … inclined plane; 212. 213 … flat portion; 214 … recess; 221 … ejection unit; 222 … a light receiving unit; 223 … transmissive window; 231 … display part; 32 … light receiving window; 33 … operating a switch; 234 … lower end; 235. 236 … end portion; 241 … fastening means; 242 … space; 251 … lock button; 261 … laser protection cover; 262 … notch portion; 263 … axle bolt; 264 … transparent glass; 265 … ND filters; 281. 282 … end portion; a11 … central axis; l … reference laser light; lv … vertical laser light; n … normal.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are technically limited to various preferable embodiments because they are preferable specific examples of the present invention, but the scope of the present invention is not limited to these embodiments unless specifically described in the following description. In the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

Fig. 1 is a cross-sectional view for explaining an example of a civil engineering method using a laser irradiation device according to an embodiment of the present invention. The laser irradiation device 2 according to the present embodiment is used for setting a reference line in civil engineering work. For example, as a typical example of work for burying a concrete pipe or the like in the ground, the following open cut method is known: the ground is excavated and concrete pipes are sequentially arranged and buried in the excavated trenches, and the soil is backfilled. As the pipe installed by the open cut method, there are listed, according to the diameter of the pipe: concrete pipes, cast iron pipes, plastic pipes, etc. The method of setting the tube is almost the same regardless of the tube. In the present embodiment, a method of civil engineering work in which a concrete pipe is buried underground using the laser irradiation device 2 will be described by taking an open cut method as an example.

The laser reference level device shown in fig. 1 includes a laser irradiation device 2 and a target 3. The laser irradiation device 2 emits laser light in a horizontal direction or a direction having a slope. The laser beam irradiated from the laser irradiation device 2 becomes a horizontal reference line when it coincides with the horizontal direction, and becomes a reference line having a slope when it is inclined at a desired angle.

An operator or the like excavates a vertical hole 63 at a depth equal to or greater than the depth of the concrete pipe 61 at the starting point of the installation of the concrete pipe 61 at regular intervals of a straight line, and excavates an embedding groove 64 continuous with the vertical hole 63 at a depth equal to or greater than the depth of the installation of the concrete pipe 61. The laser irradiation device 2 is provided in the vertical hole 63, and emits a laser beam in a direction inclined at an angle θ 1 with respect to the horizontal line, thereby forming a reference laser beam L. As described above, the laser irradiation device 2 may emit the laser beam in the horizontal direction to form the reference laser beam L as the horizontal reference line. The concrete pipe 61 is set in the embedding groove 64 via the table portion 62 such that the axis of the concrete pipe 61 coincides with the reference laser beam L. If the axis of the concrete pipe 61 coincides with the reference laser beam L, the worker or the like fills the embedding groove 64 and embeds the concrete pipe 61.

The position of the laser irradiation device 2 in the horizontal direction must be accurately set. The horizontal position of the laser irradiation device 2 is set by the following method. That is, the operator or the like sets the support base 65 above the vertical hole 63, sets the theodolite 66 on the support base 65, and positions the laser beam Lv projected in the vertical direction from the laser irradiation device 2 so as to irradiate the grounding point by observing the laser beam Lv through the telescopic telescope of the theodolite 66. Since the measurement is based on laser light, the influence of external factors such as wind can be suppressed.

In the open-cut method, the concrete pipe 61 is temporarily placed at the terminal position of the embedding groove 64, and the target 3 is placed inside the concrete pipe 61 temporarily placed at the terminal position of the embedding groove 64. The distance between the center of the target 3 and the ground point is equal to the inner diameter of the concrete pipe 61. If the target 3 is disposed inside the concrete pipe 61, the center of the target 3 coincides with the center of the concrete pipe 61.

The laser light irradiating portion of the target 3 is constituted by a translucent member. Therefore, the operator or the like can confirm the irradiation position of the reference laser beam L on the target 3 and can confirm the irradiation position of the reference laser beam L which passes through the target 3 and is diffused, for example, in a conical shape or a fan shape in the vertical direction, within the diffusion range. When setting the inclination angle of the reference laser beam L irradiated from the laser irradiation device 2, an operator or the like inputs a set value of the inclination angle to the laser irradiation device 2. The laser irradiation device 2 incorporates a tilting mechanism having a pulse motor as a drive source, and operates the tilting mechanism to emit the reference laser beam L in a tilted direction at a predetermined angle.

In this way, the operator or the like can confirm the irradiation position of the reference laser beam L by the target 3 placed on the extension line of the reference laser beam L irradiated from the laser irradiation device 2. When the irradiated reference laser beam L deviates from the center of the target 3, the laser irradiation device 2 scans the target 3 with the reference laser beam L irradiated from the laser irradiation device 2, and receives the reflected laser beam reflected by the reference laser beam L at the reflection portion of the target 3, thereby calculating the center of the target 3 from the light receiving state of the reflected laser beam and automatically adjusting the irradiation position of the reference laser beam L. That is, the laser irradiation device 2 detects the irradiation center of the target 3 and automatically matches the irradiation position of the reference laser beam L with the irradiation center of the target 3.

The method of civil engineering work for burying the concrete pipe 61 underground using the laser irradiation device 2 has been described above by taking the open cut method as an example. However, the method of civil engineering work for burying the concrete pipe 61 underground is not limited to the open cut method, and other methods may be used.

Next, the laser irradiation device 2 according to the present embodiment will be described with reference to the drawings. Fig. 2 is a perspective view of the laser irradiation device according to the present embodiment as viewed from the front side. Fig. 3 is a perspective view of the laser irradiation device according to the present embodiment viewed from the rear side. Fig. 4 is a side view of the laser irradiation device according to the present embodiment. Fig. 5 is a front view of the laser irradiation device according to the present embodiment. Fig. 6 is a plan view of the laser irradiation device according to the present embodiment. Fig. 7 is a bottom view of the laser irradiation device according to the present embodiment.

The laser irradiation device 2 according to the present embodiment includes: a case 21 functioning as a housing of the main body, a laser oscillation device 22 (see fig. 4), an operation unit 23, a grip 24, and a leg 27. The housing 21 has a substantially cylindrical shape and is supported by the four leg portions 27 in an installation state when the laser irradiation device 2 sets a reference line. The number of the leg portions 27 is not limited to four. The leg portion 27 is detachably attached to the housing 21. Therefore, for example, the operator or the like can replace the leg 27 with another leg 27 having a different length according to the diameter of the concrete pipe 61.

As shown in fig. 4, the housing 21 has an inclined surface 211. The inclined surface 211 is formed at one end 281 in the direction of the central axis a11 of the substantially cylindrical housing 21. The normal line N of the inclined surface 211 extends obliquely upward in the installed state of the laser irradiation device 2. That is, in the installed state of the laser irradiation device 2, the inclined surface 211 is inclined such that the normal line N extends obliquely upward. As shown in fig. 4, when the laser irradiation device 2 is viewed from the side, the angle θ 3 between the inclined surface 211 and the central axis a11 is, for example, about 30 ° or more and about 40 ° or less. However, the angle θ 3 is not limited to this range.

A laser protection cover 261 and a transparent glass 264 are provided on the upper surface of the case 21. The laser protection cover 261 is provided to be rotatable about the shaft bolt 263 with respect to the housing 21, and has a notch 262 that is notched from an outer edge portion toward the center. The laser protection cover 261 has an ND (density) filter 265, and the ND (density) filter 265 is provided at a symmetrical position on the opposite side of the notched portion 262 when viewed from the shaft bolt 263. The ND filter 265 is provided in contact with a diffusion filter (not shown) to ensure better visibility of the laser beam. The transparent glass 264 can transmit laser light by covering an antenna hole (not shown) provided through the case 21.

The worker or the like can dispose one of the notch 262 and the ND filter 265 above the sky hole via the transparent glass 264 by rotating the laser protection cover 261 about the shaft bolt 263 with respect to the case 21. In a state where the notch 262 is disposed above the antenna hole via the transparent glass 264, the vertical laser beam Lv is irradiated from the laser irradiation device 2 in the vertical direction through the antenna hole, the transparent glass 264, and the notch 262. In a state where the ND filter 265 is disposed above the ceiling hole via the transparent glass 264, the vertical laser beam Lv is irradiated from the laser irradiation device 2 in the vertical direction through the ceiling hole, the transparent glass 264, and the ND filter 265. The ND filter 265 blocks a part of the laser beam emitted from the laser irradiation device 2 and transmits only a small amount of the laser beam. Therefore, the operator or the like can confirm the irradiation position of the vertical laser beam Lv irradiated through the ND filter 265.

As shown in fig. 3, the housing 21 has a transmission window 223, and the transmission window 223 is provided at the other end portion 282 in the direction of the central axis a 11. The reference laser beam L is irradiated from the laser irradiation device 2 through the transmission window 223. The reflected laser beam reflected by the target 3 (see fig. 1) is transmitted through the transmission window 223 into the housing 21, and is received by the light receiving unit 222 (see fig. 4) provided inside the housing 21.

The surface of the case 21 is coated with an antifouling coating. For example, the surface of the base material of the case 21 is etched to form fine irregularities on a nanometer scale. Further, a glassy coating layer mainly composed of silicon and oxygen is laminated on the surface of the base material of the case 21, and penetrates into fine recesses formed on the surface of the base material of the case 21. The substrate and the glassy coating layer of the case 21 are physically adhered to each other by an anchor effect.

A perfluoroalkyl silane layer is laminated on the glassy coating layer. The two layers are in a state in which OH groups present on the surface of the glassy coating layer and OH groups present on the surface (lower side) of the perfluoroalkyl silane layer are condensed with each other and chemically bonded to each other through a siloxane bond (Si-O-Si).

On the surface (upper side) of the perfluoroalkylsilane layer, the perfluoroalkyl group is aligned. The perfluoroalkyl group exerts antifouling property against the adhesion of stains, scratches during wiping, and the occurrence of stains due to staining components.

Alternatively, as another example of the antifouling coating, an antifouling layer having a portion corresponding to a glassy coating layer and a portion corresponding to a perfluoroalkyl silane layer formed in one layer may be laminated on the surface of the base material of the case 21. The anti-fouling layer is formed from a liquid laminate layer and has no distinct interface, but is separated from the glassy coating portion and the perfluoroalkylsilane portion. The glassy coating portion present on the lower side of the antifouling layer penetrates into fine recesses formed on the surface of the base material of the case 21. The substrate and the glass-like coated portion of the case 21 are in a state of being physically bonded to each other by an anchoring effect.

In the stain-proofing layer, the OH group derived from the glassy coating portion and the OH group derived from the perfluoroalkyl silane portion are condensed with each other, and chemically bonded to each other through a siloxane bond (Si — O — Si).

On the surface (upper side) of the antifouling layer, the perfluoroalkyl group is aligned. As described above, perfluoroalkyl groups exhibit antifouling properties against the adhesion of stains, scratches during wiping, and the occurrence of stains due to stain components. The surface of the casing 21 is not limited to the above.

As shown in fig. 4, the laser oscillator 22 is provided inside the housing 21 so as to be swingable in both the vertical direction and the horizontal direction, and irradiates laser beams in both the horizontal direction and the vertical direction. Specifically, the laser oscillator 22 irradiates the laser beam in the horizontal direction, and emits the reference laser beam L toward the target 3 through the transmission window 223. The laser oscillator 22 irradiates a laser beam in the vertical direction and emits a vertical laser beam Lv in the vertical direction through the transparent glass 264.

As the laser oscillator 22, a conventional laser oscillator used as a laser irradiation device is applied. That is, the laser oscillator 22 includes an emitting unit 221 and a light receiving unit 222. The emission unit 221 has a light emitting element such as a laser diode and an optical system including an optical member such as a collimator lens, and emits the reference laser light L toward the target 3. The light receiving unit 222 has a light receiving element such as a photodiode and an optical system including optical components such as a focusing lens and a polarizing plate, and receives the reflected laser light reflected by the target 3 and propagating inside the housing 21.

The operation portion 23 is provided on the inclined surface 211 of the housing 21. In other words, the inclined surface 211 of the housing 21 also serves as the operation portion 23. The operation unit 23 includes a display unit 231, a light receiving window 232, and various operation switches 233. The display unit 231 displays, for example: a set value of the inclination, an operation state, an irradiation direction of the laser beam, a detection position of the target 3, and the like. The display unit 231 displays a set angle θ 1 (see fig. 1) of the reference laser beam L emitted from the laser irradiation device 2 with respect to a horizontal line, or a measurement result of the concrete pipe 61 such as a horizontal angle and an inclination angle. Since the display unit 231 is provided on the inclined surface 211 inclined so that the normal line N extends obliquely upward, the operator or the like can confirm the content displayed on the display unit 231 from the outside (upward) of the vertical hole 63.

The light receiving window 232 receives a remote control operation signal from a remote controller (not shown). Since the light receiving window 232 is provided on the inclined surface 211, it can receive a remote control operation signal from either the horizontal direction or the vertical direction. Thus, the operator or the like can remotely operate the laser irradiation device 2 from either the horizontal direction or the vertical direction using the remote controller, and can remotely operate the laser irradiation device 2 from the outside of the vertical hole 63, for example. The various operation switches 233 are used when an operator or the like operates the laser irradiation device 2 to turn on/off the power supply and sets the angle θ 1 of the reference laser beam L with respect to the horizontal line to set the automatic alignment for aligning the reference laser beam L with the center of the target 3.

As shown in fig. 5,

flat portions

212 and 213 are provided on both sides of the operation portion 23 when viewed along the center axis a 11. In the laser irradiation device 2 shown in fig. 5, the flat portion 212 is a portion formed flat on the outer shape of the right housing 21 of the operation portion 23. The flat portion 213 is a portion formed flat on the outer shape of the left housing 21 of the operation portion 23. That is, the

flat portions

212 and 213 are flat portions formed in a part of the outer shape of the substantially cylindrical housing 21.

The recess 214 is provided on the side opposite to the operation portion 23 when viewed from the center axis a 11. In other words, the recess 214 is provided on the bottom surface of the housing 21 near the one end 281 in the direction of the center axis a 11. The recess 214 is a portion where the outer shape of the housing 21 recedes toward the center axis a 11. Details of the recess 214 will be described later.

The grip portion 24 is connected to a lower end 234 of the operation portion 23. Specifically, as shown in fig. 5, the grip portion 24 is connected to one end 235 of the lower end 234 of the operation portion 23 and the other end 236 of the lower end 234 of the operation portion 23, and is fastened to both ends 235, 236 of the lower end 234 of the operation portion 23 by a fastening member 241 such as a screw. The worker or the like can detach the grip portion 24 from the housing 21 by releasing the fastening member 241. Since the fastening member 241 is provided at the lower end 234 of the operating portion 23, for example, an operator or the like can easily release the fastening member 241 in a state where the laser irradiation device 2 is provided inside the concrete pipe 61, and can easily perform the operation of retrieving the laser irradiation device 2 in a state where the grip portion 24 inside the concrete pipe 61 is detached from the housing 21.

As shown in fig. 4, the grip portion 24 extends from the lower end 234 of the operation portion 23 along the normal N of the inclined surface 211. In the present specification, the phrase "extend along the normal line N" refers not only to a state in which the grip portion 24 extends parallel to the normal line N, but also to a state in which the grip portion 24 extends substantially parallel to the normal line N on the premise that the effect that the operator or the like can easily perform the operation of retrieving the laser irradiation device 2 in the concrete pipe 61 while ensuring the operability of the grip portion 24 is obtained. In the laser irradiation device 2 according to the present embodiment, the angle between the direction in which the grip portion 24 extends and the direction of the normal N is, for example, about ± 5 °. That is, the angle θ 2 between the grip portion 24 and the inclined surface 211 is, for example, about 85 ° or more and about 95 ° or less.

As shown in fig. 5, the grip portion 24 extends in an arc shape from one end 235 of the lower end portion 234 of the operating portion 23 to the other end 236 of the lower end portion 234 of the operating portion 23 within the range inside the outer shape of the case 21 when viewed along the central axis a 11. That is, when viewed along the center axis a11, the grip portion 24 extends in an arc shape from both

end portions

235, 236 of the lower end portion 234 of the operation portion 23 without protruding outward from the outer shape of the housing 21.

As shown in fig. 4, the laser irradiation device 2 according to the present embodiment further includes a power supply unit 25. The power supply unit 25 is provided inside the housing 21 and is disposed between the operation unit 23 and the concave portion 214. That is, the power supply unit 25 is provided inside the casing 21 in the vicinity of one end portion 281 in the direction of the center axis a 11. The power supply unit 25 supplies power to the laser oscillator 22, the display unit 231, and the like.

The power supply unit 25 includes, for example, a battery pack. Batteries such as dry cells and rechargeable batteries are housed in the battery pack. The number of the batteries is not particularly limited, and may be one or more. The power supply unit 25 has a lock knob 251 provided at one end portion 281 in the direction of the center axis a 11. The operator or the like can fix the power supply unit 25 inside the housing 21 or release the fixation of the power supply unit 25 to the housing 21 by rotating the lock knob 251. That is, the operator or the like can attach the power supply unit 25 to the inside of the housing 21 or detach the power supply unit 25 from the inside of the housing 21 by operating the lock knob 251.

Here, according to the findings obtained by the present inventors, the grip portion of the laser irradiation device is used not only for the operator or the like to grip the laser irradiation device, but also for the operator or the like to attach and pull the rope to retrieve the laser irradiation device in the tube. For example, when a plurality of pipes are installed underground with a predetermined angle being given thereto, it is known that an operation of an operator or the like to retrieve the laser irradiation device inside the pipe is as follows: the grip portion is difficult to be hooked on, for example, a boundary portion of a plurality of tubes.

In contrast, according to the laser irradiation device 2 of the present embodiment, the grip portion 24 is connected to the lower end 234 of the operation portion 23 and extends from the lower end 234 of the operation portion 23 along the normal N of the inclined surface 211. Therefore, the grip portion 24 does not cover the operation portion 23, and it is possible to avoid a situation in which an operator or the like is prevented from checking from the outside (above) of the vertical hole 63 or operating the operation portion 23. Further, since the grip portion 24 extends from the lower end 234 of the operation portion 23 along the normal N of the inclined surface 211, the grip portion 24 can be easily gripped as compared with a case where the grip portion 24 protrudes in the horizontal direction (for example, forward from the lower end 234 of the operation portion 23). This ensures the operability of the grip portion 24.

Further, since the grip portion 24 extends from the lower end 234 of the operation portion 23 along the normal N of the inclined surface 211, the amount of protrusion in the horizontal direction can be suppressed as compared with the case where the grip portion 24 protrudes in the horizontal direction. Therefore, for example, when an operator or the like pulls the holding portion 24 by attaching a rope to the holding portion 24 to retrieve the laser irradiation device 2 in the concrete pipe 61, the holding portion 24 can be prevented from being caught at a predetermined portion in the concrete pipe 61. This allows an operator or the like to easily perform the operation of retrieving the laser irradiation device 2 from the concrete pipe 61.

Further, the grip portion 24 extends in an arc shape from the one end 235 of the lower end portion 234 of the operating portion 23 to the other end 236 of the lower end portion 234 of the operating portion 23 within the range inside the outer shape of the case 21 as viewed along the central axis a 11. As described above, the grip portion 24 extends from the lower end 234 of the operation portion 23 along the normal N of the inclined surface 211. Therefore, as shown by arrow a1 in fig. 4, the operator or the like can easily insert his or her hand into the space 242 (see fig. 3) between the inclined surface 211 of the housing 21 and the grip portion 24, and can easily grip the grip portion 24. This ensures the operability of the grip portion 24.

Further, since the grip portion 24 extends in an arc shape within the range inside the outer shape of the housing 21, it does not protrude outside the housing 21 when viewed along the central axis a 11. Therefore, for example, when an operator or the like pulls the holding portion 24 by attaching a rope to the holding portion 24 to retrieve the laser irradiation device 2 in the concrete pipe 61, the holding portion 24 can be further prevented from being caught at a predetermined portion in the concrete pipe 61. This allows the operator or the like to further easily perform the operation of retrieving the laser irradiation device 2 from the concrete pipe 61.

Further, the recess 214 formed by the outer shape of the housing 21 receding toward the center axis a11 is provided on the side opposite to the operation portion 23 when viewed from the center axis a 11. Therefore, when the operator or the like grips the grip portion 24, the operator can place the thumb on the grip portion 24 and place at least one of the index finger, the middle finger, the ring finger, and the small finger on the concave portion 214. This is explained in further detail with reference to the figures.

Fig. 8 is a cross-sectional view illustrating a state in which the laser irradiation device according to the present embodiment is installed in a pipe. As described above, the recess 214 of the housing 21 is provided on the side opposite to the operation portion 23 when viewed from the center axis a 11. Therefore, as shown in fig. 8, when the operator or the like grips the grip portion 24, the operator can place the thumb 41 on the grip portion 24 and place at least one of the index finger, the middle finger, the ring finger, and the small finger 42 on the concave portion 214. Accordingly, for example, as shown by an arrow a2 shown in fig. 8, the operator or the like can easily place the laser irradiation device 2 in the concrete pipe 61 extending in the substantially horizontal direction and can easily set the setting state when setting the reference line by turning the thumb 41 placed in the grip portion 24 with at least one of the index finger, the middle finger, the ring finger, and the small finger 42 placed in the recessed portion 214 as a fulcrum.

The concrete pipe 61 shown in fig. 8 has a shape in which a plurality of pipes orthogonal to each other are connected, and has a plurality of cavities orthogonal to each other inside. However, the concrete pipe 61 is not limited to the pipe having the shape illustrated in fig. 8, and may have a shape extending in one direction and a hollow extending in one direction inside as illustrated in fig. 1, for example. Even in this case, the operator or the like can easily dispose the laser irradiation device 2 through the vertical hole 63 in the concrete pipe 61 extending in the substantially horizontal direction by turning the thumb 41 placed on the grip portion 24 with at least one of the index finger, the middle finger, the ring finger, and the small finger 42 placed on the concave portion 214 as a fulcrum, and can easily set the installation state when the reference line is set.

Further, the power supply unit 25 is provided between the operation unit 23 and the concave portion 214 inside the housing 21. The power supply unit 25 is relatively heavy among the components constituting the laser irradiation device 2. Therefore, the center of gravity of the laser irradiation device 2 is located close to the operation unit 23 and the recess 214, as compared with the case where the power supply unit 25 is not provided between the operation unit 23 and the recess 214. This enables an operator or the like to easily lift the laser irradiation device 2 while holding the grip portion 24, and to transport the laser irradiation device 2 or place it in the concrete pipe 61. For example, the operator or the like can easily carry the laser irradiation device 2 or place it in the concrete pipe 61 with one hand by placing the thumb 41 on the grip portion 24 and placing at least one of the index finger, the middle finger, the ring finger, and the little finger 42 on the concave portion 214.

The housing 21 has

flat portions

212 and 213 formed to have flat outer shapes. The

flat portions

212, 213 are provided on both sides of the operation portion 23 when viewed along the center axis a 11. Therefore, for example, the operator can place the thumb 41 on one of the

flat portions

212 and 213 provided on both sides of the operation portion 23, and place at least one of the index finger, the middle finger, the ring finger, and the pinky finger 42 on the other of the

flat portions

212 and 213 provided on both sides of the operation portion 23. Accordingly, the operator or the like can easily hold and transport the laser irradiation device 2 with one hand by sandwiching the case 21 between the thumb 41 and at least one of the index finger, the middle finger, the ring finger, and the little finger 42. Further, since the

flat portions

212 and 213 have flat outer shapes, the adhesion and accumulation of mud and soil on the

flat portions

212 and 213 can be suppressed.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made within the scope not departing from the scope of the claims. The configurations of the above embodiments may be partially omitted, or may be arbitrarily combined in a manner different from the above.

Claims

1. A laser irradiation device for setting a reference line in civil engineering work, comprising:

a housing having a substantially cylindrical shape and having an inclined surface at one end portion thereof, the inclined surface being inclined such that a normal line thereof extends obliquely upward in an installation state when the reference line is set;

a laser oscillator device provided inside the housing and having an emitting unit that emits a laser beam toward a target and a light receiving unit that receives a reflected laser beam reflected by the target;

an operating part arranged on the inclined surface; and

a grip portion connected to a lower end portion of the operation portion and extending from the lower end portion along the normal line.

2. The laser irradiation apparatus according to claim 1,

the grip portions are connected to both end portions of the lower end portion when viewed along a central axis of the substantially cylindrical housing, and extend in an arc shape from one of the end portions within an inner range of an outer shape of the housing to reach the other of the end portions.

3. The laser irradiation apparatus according to claim 1 or 2,

the housing further includes a recess provided on the opposite side of the operating portion when viewed from the center axis of the substantially cylindrical housing and having an outer shape that is receded toward the center axis.

4. The laser irradiation apparatus according to claim 3,

the laser irradiation device further includes a power supply unit that is provided between the operation unit and the recess in the housing and supplies power to the laser oscillation device.

5. The laser irradiation apparatus according to any one of claims 1 to 4,

the housing further includes flat portions provided on both sides of the operation portion and having a flat outer shape when viewed along a center axis of the substantially cylindrical housing.