Laser irradiation device

Abstract

To provide a laser irradiation device that can reliably suck a removal object and whose maintenance after use is easy.SOLUTION: An air supply port is provided in a distal end portion of a device body. A suction nozzle 2 is attachably and detachably arranged in the distal end portion of the device body. A connecting jet tool 3 connected with the air supply port is provided inside the suction nozzle 2. A suction port 2A is formed in a distal end portion of the suction nozzle 2. A discharge port 2B is formed in a side surface of the suction nozzle 2. A removal object inside the suction nozzle 2 is agitated by compression air from the connecting jet tool 3. The agitated removal object Q is discharged from the discharge port 2B.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a laser irradiation device that uses a laser to remove rust, paint, etc. from the surface of a structure and then sucks and collects the removed material, and in particular to a laser irradiation device that reliably sucks up the removed material and makes maintenance after use easy. [Background technology]

[0002] Patent Document 1 describes a laser irradiation device that removes coatings such as rust and paint from the surface of a structure while suctioning and collecting the removed material. This device includes a scanner head 201 that irradiates a pulsed laser and a dust collection suction port 202 attached to the scanner head 201.

[0003] This dust collection suction port 202 is installed near the position where the pulse laser is irradiated. In other words, it is installed near the position where paint film, rust, etc. on the surface of the structure is to be removed. Plasma is generated on the surface of the structure by the pulse laser, and the removed material peeled off from the surface of the structure is sucked through the dust collection suction port 202.

[0004] Meanwhile, a recovery device for laser treatment formed separately from the laser irradiation device is described in Patent Document 2. This recovery device is configured to form a recovery case 21 that surrounds the laser irradiation surface, and to irradiate the treatment target surface 5 with laser light through a transparent panel 12 of this recovery case 21. The air inside the recovery case 21 is sucked out, thereby sucking out the removed material generated inside the recovery case 21.

[0005] Furthermore, Patent Document 3 describes a laser irradiation device in which suction means 31 is provided inside the main body of the laser head 3 and a laser is irradiated within an attachment 5. This laser irradiation device is provided with an attachment 5 that surrounds the surface 20 of the structure, and a laser is irradiated within this attachment 5, while material within the attachment 5 that has peeled off from the surface is sucked in by the suction means 31. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2020-131258 [Patent Document 2] Patent No. 7450241 [Patent Document 3] Patent No. 6059182 Summary of the Invention [Problem to be solved by the invention]

[0007] In the laser irradiation device of Patent Document 1, the focusing lens 5 for irradiating the laser is held at a position away from the surface of the structure, and the dust collection suction port 202 is positioned near the surface of the structure. Therefore, it is difficult to reliably suck in the paint film, rust, and other materials that have peeled off the surface of the structure through the dust collection suction port 202.

[0008] That is, since the surface of the structure is in an open state, the paint film, rust, and other removed materials that are peeled off by the laser are scattered widely around the surface.

[0009] However, since the dust collection suction port 202 is positioned in a part near the area where the laser is irradiated, it becomes difficult for the dust collection suction port 202 in this position to reliably suck up the paint film, rust, and other materials that are scattered around.

[0010] On the other hand, the recovery device for laser treatment described in Patent Document 2 requires the recovery device to be operated in addition to the operation of the laser irradiation unit. That is, in addition to the operation of removing the coating film or the like from the surface of the structure with a laser, the recovery device must be moved to a predetermined position and fixed in place. Therefore, the operation of removing the coating film or the like by laser irradiation requires a lot of effort.

[0011] Furthermore, the laser irradiation device of Patent Document 3 is configured such that removal material is generated within the attachment 5 that irradiates the laser, and this removal material is sucked up by the suction means 31 provided inside the main body. Therefore, the attachment 5 and the suction means 31 are pre-installed in the laser irradiation device, which has the disadvantage of making the structure of the device extremely complicated.

[0012] Moreover, since the suction means 31 is configured to pass through the inside of the device, there is a risk that the suctioned removed matter may adhere to the inside of the device, the lens, etc. As a result, maintenance of the device after use requires a lot of effort.

[0013] The present invention has been devised to solve the above-mentioned problems, and aims to provide a laser irradiation device that can reliably suck up removed material and is easy to maintain after use. [Means for solving the problem]

[0014] In order to achieve the above object, the first means of the present invention is: A laser irradiation device that removes a substance Q from a surface of an object by irradiating laser light from a device body 1 equipped with a laser oscillator, An air supply port 1B is provided at the tip side of the device body 1, and compressed air is sprayed in the direction of laser irradiation, A suction nozzle 2 is detachably disposed at the tip of the device body 1, and a connecting jet 3 is provided on the suction nozzle 2 so as to be detachably connected to the air supply port 1B, a suction port (2A) that opens so as to surround the periphery of the position where the laser light is irradiated and that sucks the removed matter (Q), and a discharge port (2B) that opens on a side surface of the suction nozzle (2) and that discharges the sucked removed matter to the outside; The removed matter Q is sucked through the suction port 2A and discharged from the discharge port 2B while being stirred by compressed air from the connecting jetting tool 3.

[0015] The connecting spray device 3 of the second means comprises a connecting pipe 3A that fits into the air supply port 1B, and a spray pipe 3B that extends from both the left and right ends of the connecting pipe 3A and sprays the compressed air toward the inside of the suction nozzle 2.

[0016] The discharge outlet 2B of the third means is formed on the left or right side or top surface of the suction nozzle 2, and is configured to discharge the removed material Q inside the suction nozzle 2 to the outside via a discharge hose 4 connected to a suction device.

[0017] The fourth means is a roller 5 attached to the tip side of the suction nozzle 2, which keeps the distance between the suction port 2A and the surface of the object constant. [Effects of the Invention]

[0018] As in the present invention, by discharging the removed material Q sucked from the suction port 2A to the outside while stirring it with compressed air from the connecting sprayer 3, it becomes possible to efficiently discharge removed material Q of different particle types, such as paint or rust peeled off from the surface of the target object.

[0019] Furthermore, the temperature of the removed material Q, which has been raised by irradiating it with laser light, can be rapidly lowered by the compressed air of the connecting sprayer 3, preventing the particulate removed material Q from adhering to the surrounding area. As a result, maintenance after use is also easy. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a side view showing a state in which an embodiment of the present invention is used. [Figure 2] FIG. 1 is a plan view showing an embodiment of the present invention. [Figure 3] FIG. 2 is a perspective view showing the main part of the tip of the device main body of the present invention. [Figure 4] 1 is a perspective view showing an embodiment of a suction nozzle of the present invention. [Figure 5] FIG. 2 is a rear view showing an embodiment of the suction nozzle of the present invention. [Figure 6] FIG. 10 is a side view showing a state in which another embodiment of the present invention is used. [Figure 7] FIG. 10 is a plan view showing another embodiment of the present invention. [Figure 8] FIG. 10 is a perspective view showing another embodiment of the suction nozzle of the present invention. [Figure 9] FIG. 10 is a rear view showing another embodiment of the suction nozzle of the present invention. [Figure 10] 1 is an explanatory diagram illustrating the principle of removal of a removed substance according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The device of the present invention is a device that focuses a laser beam to remove rust and paint from the surface of an object (see Figure 1). A suction nozzle 2 is detachably attached to the tip of the device body 1. Furthermore, an air supply port 1B is provided at the tip of the device body 1 to supply compressed air in the direction of the laser beam irradiation (see Figure 3).

[0022] The illustrated air supply port 1B is configured to supply compressed air supplied from an air supply hose 10 provided at the rear end of the device main body 1 to the air supply port 1B at the tip of the device main body 1 (see Figures 1 to 3).

[0023] Furthermore, the air supply hose 10 and the air supply port 1B may be provided separately (not shown) from the device main body 1. Furthermore, the device main body 1 has a built-in laser oscillator and a focusing lens, and is equipped with a cover glass 1A at the tip to protect the focusing lens (see Figure 3).

[0024] On the other hand, the air supply port 1B is a portion that sprays compressed air in the direction of laser irradiation (see Figure 3). The illustrated air supply port 1B opens below the cover glass 1A and sprays compressed air supplied from an air supply hose 10 in the direction of laser light irradiation.

[0025] Furthermore, a suction nozzle 2 is detachably attached to the tip of the device main body 1 (see Figures 1 and 2). In the illustrated example, the suction nozzle 2 is attached and detached using a pair of connectors 1D provided on both sides of the tip of the device main body 1 (see Figure 3). This suction nozzle 2 is formed with a suction port 2A and a discharge port 2B, and the removed material Q inside the suction nozzle 2 is sucked up by a discharge hose 4 connected to the discharge port 2B and a suction device (see Figure 4).

[0026] The suction port 2A of the suction nozzle 2 is an opening on the tip side of the suction nozzle 2, and is formed so as to surround the periphery of the position where the laser light is irradiated (see FIG. 5).

[0027] The discharge outlet 2B is an opening on the side of the suction nozzle 2, and a discharge hose 4 is connected to the outside of this discharge outlet 2B. The discharge outlets 2B shown in Figures 1 to 5, excluding Figure 3, are formed as a pair on the left and right side surfaces of the suction nozzle 2. It is also possible to form the discharge outlet 2B on the top surface of the suction nozzle 2, as shown in Figures 6 to 8. Then, the discharge hose 4 is connected to these discharge outlets 2B, and the removed matter Q inside the suction nozzle 2 is discharged to the outside by a suction device.

[0028] Furthermore, a connecting jet 3 is provided on the suction nozzle 2 (see Figure 4). This connecting jet 3 is detachably connected to the air supply port 1B and injects compressed air from the air supply port 1B into the inside of the suction nozzle 2. The illustrated connecting jet 3 is provided inside the suction nozzle 2, and connects a connecting pipe 3A and a jet pipe 3B with a connecting arm 3C.

[0029] In addition, if the air supply port 1B is provided on the outside of the device main body 1, it is also possible to provide the connecting spray device 3 with a connecting pipe 3A and a connecting arm 3C outside the suction nozzle 2, and insert the tip of the spray pipe 3B into the inside of the suction nozzle 2 (not shown).

[0030] The connecting pipe 3A is tubular and has a diameter that fits inside the air supply port 1B at the portion where it is connected to the air supply port 1B (see FIG. 4). On the other hand, the injection pipe 3B is a pair of pipe members that branch off to the left and right via a connecting arm 3C fixed to the connecting pipe 3A.

[0031] The tips of the left and right jet pipes 3B are each directed toward the inside of the suction nozzle 2, and are installed so that air flows cross from the left and right at the front side of the cover glass 1A at the tip of the device main body 1 (see Figure 5). In this state, when compressed air is jetted into the inside of the suction nozzle 2, the compressed air is discharged from the outlet 2B while stirring the removed matter Q inside the suction nozzle 2. At this time, it is desirable to supply compressed air at a pressure of 3 to 4 bar.

[0032] That is, by discharging the removed material Q from the outlet 2B while stirring it at the tip end of the device body 1, the removed material Q is less likely to come into contact with the tip end of the device body 1. Also, it is expected that the adhesive strength of paint and the like that has turned into fine particles at high temperatures can be reduced by lowering the temperature.

[0033] Furthermore, a pair of rollers 5 are attached to the tip side of the suction port 2A of the suction nozzle 2 (see Figure 4). These rollers 5 maintain a constant distance between the suction port 2A and the surface of the object when the suction port 2A is moved. The illustrated rollers 5 are connected to a band-shaped fixture 5A placed on the upper tip side of the suction nozzle 2, and this fixture 5A is screwed to the top surface of the suction nozzle 2 with fixing screws 5B.

[0034] This roller 5 keeps the position of the suction port 2A constant, enabling the most efficient suction. When irradiating a target object with laser light P to remove rust or paint, the rust or paint vaporizes or breaks down into fine particles, becoming the removed material Q (see Figure 10). Therefore, by maintaining a constant distance between the target object surface and the suction port 2A, which opens around the area where the laser light P is irradiated, the focal length of the laser light P is kept constant, and the amount of air sucked in through the suction port 2A is also kept constant, allowing the removed material Q to be sucked in efficiently.

[0035] Furthermore, the illustrated device body 1 is provided with a suction port 1C at the tip (see FIG. 3). This suction port 1C is configured to suck in the removed material Q and discharge it to the outside through the device body 1. However, in the device of the present invention, in order to prevent adhesion to the inside of the device body 1, this suction port 1C is not used, and the removed material Q is discharged to the outside from a discharge port 2B formed in the suction nozzle 2 (see FIG. 4).

[0036] Therefore, the illustrated suction nozzle 2 is provided with a cover member 2C that, when attached, closes the suction port 1C provided at the tip of the device main body 1. When the suction nozzle 2 is attached, this cover member 2C closes the suction port 1C. It is also possible to use a device main body 1 that does not have the suction port 1C or air supply port 1B provided in advance.

[0037] The configuration of the present invention is not limited to the illustrated example, and design changes such as changes to the configuration of the suction means and injection means can be freely made within the scope of the present invention without changing the gist of the present invention. [Explanation of symbols]

[0038] P laser light Q Removed items 1. Device body 1A Lens cover 1B Air supply port 1C Suction port 1D connector 2 suction nozzles 2A suction port 2B Outlet 2C Cover material 3 Connected injection device 3A connecting pipe 3B Injection pipe 3C Connecting Arm 4 Discharge Hose 5 Roller 5A Fixture 5B fixing screw 10 Air supply hose

Claims

1. A laser irradiation device that removes material from the surface of an object by irradiating laser light from a device body equipped with a laser oscillator, An air supply port is provided at the tip side of the device body, and compressed air is sprayed in the direction of laser irradiation, a suction nozzle is detachably disposed at the tip of the device body, and a connecting jet is provided on the suction nozzle so as to be detachably connected to the air supply port; a suction port that opens so as to surround the periphery of the position where the laser light is irradiated and that sucks in the removed material, and a discharge port that opens on a side surface of the suction nozzle and that discharges the sucked removed material to the outside, The laser irradiation device is characterized in that the removed material sucked through the suction port is discharged from the discharge port while being agitated by compressed air from a connected injector.

2. 2. The laser irradiation device according to claim 1, wherein the connecting injector comprises a connecting pipe fitted to the air supply port, and an injection pipe extending from both left and right ends of the connecting pipe to inject the compressed air toward the inside of the suction nozzle.

3. 2. The laser irradiation device according to claim 1, wherein the exhaust outlet is formed on the left or right side or top surface of the suction nozzle and is configured to exhaust the removed material from the suction nozzle to the outside through an exhaust hose connected to a suction device.

4. 2. The laser irradiation device according to claim 1, wherein a roller is attached to the tip of the suction nozzle for maintaining a constant distance between the suction port and the surface of the object.

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