JP3221486U - Shield attachment - Google Patents

Abstract

An object is to provide a shielding attachment capable of preventing irradiation of a laser beam to an object other than an object and preventing occurrence of a defect such as damage of the object. The configuration of the shielding attachment 100 is a shielding attachment 100 for shielding a laser beam 104 irradiated from a laser irradiation device, and an attachment portion 110 attached to a laser head 102 of the laser irradiation device; A light shielding plate 120 disposed on the optical axis 104a on the side opposite to the laser head 102 with respect to the irradiation object 106, and an arm 130 connecting the mounting portion 110 and the light shielding plate 120 avoiding the object 106 . [Selected figure] Figure 1

Description

  The present invention relates to a shielding attachment that shields laser light emitted from a laser irradiation device.

  A structure such as a steel tower may be coated for the purpose of rust prevention etc., and the coating film and rust are peeled off at the time of repair. As a method of peeling a coating film and rust, although kelen, a blast, etc. were conventionally used, the method of using a laser irradiation apparatus like patent document 1 is examined in recent years, for example. The laser irradiation apparatus of Patent Document 1 transmits laser light output from a laser oscillator through a fiber, focuses the laser light, and irradiates the surface of a structure from a laser head.

JP, 2014-210290, A

  When the object irradiated with the laser beam has a large area such as a wall surface, the laser beam is not irradiated other than the object. However, when the object is a member such as a foot of a steel tower, the laser light may be deviated from the object because the object is thin. Then, an object other than the object is irradiated with the laser beam, and a problem such as damage to the object occurs.

  In view of such problems, the present invention aims to provide a shielding attachment capable of preventing irradiation of laser light to an object other than an object and preventing occurrence of a defect such as damage to the object. There is.

  In order to solve the above-mentioned subject, a typical composition of a shielding attachment concerning the present invention is a shielding attachment which shields a laser beam irradiated from a laser irradiation device, and is an attachment part attached to a laser head of a laser irradiation device And a light shielding plate disposed on the optical axis on the side opposite to the laser head with respect to the object to be irradiated with the laser light, and an arm connecting the mounting portion and the light shielding plate while avoiding the object. I assume.

  According to the above configuration, even if the laser light deviates with respect to the object, the deviated laser light is irradiated to the light shielding plate. Therefore, it is possible to prevent the irradiation of the laser beam to an object other than the object, and to prevent the occurrence of a defect such as damage to the object.

  The mounting portion may be a rail of a circular arc centered on the optical axis, and the arm may move the rail of the mounting portion and be rotatable around the optical axis. According to this configuration, the position of the arm can be easily moved in accordance with the shape of the object to be irradiated with the laser light. Then, even when the position of the arm changes, it is possible to always arrange the light shielding plate on the optical axis of the laser irradiation apparatus, and the above-described effect can be reliably obtained.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to prevent irradiation of the laser beam to objects other than a target object, and to provide the shielding attachment which can prevent generation | occurrence | production of malfunctions, such as a damage of this object.

It is a figure which shows the shielding attachment concerning this embodiment, and the laser head to which it is attached. It is a figure explaining the positional relationship of a shielding attachment and a target object. It is a perspective view of the shielding attachment. It is a figure explaining rotation of an arm. It is a figure explaining rotation of an arm.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating the understanding of the invention, and the invention is not limited unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations will be assigned the same reference numerals to omit repeated descriptions, and elements not directly related to the present invention will not be illustrated. Do.

  FIG. 1 is a view showing a shielding attachment 100 according to the present embodiment and a laser head 102 to which it is attached. The laser head 102 is a commercially available product, and can be any laser head. As shown in FIG. 1, a laser beam 104 is emitted from a laser head 102 of a laser irradiation apparatus (not shown) to an object 106 (L-shaped steel in the figure) to be irradiated with laser light. The laser head 102 sweeps the laser beam 104 to the left and right with respect to the optical axis 104a, so in FIG.

  The shielding attachment 100 of this embodiment is attached to the laser head 102 of a laser irradiation apparatus (not shown), and shields the laser beam 104 irradiated from the laser irradiation apparatus 102. The shielding attachment 100 includes an attaching portion 110, a light shielding plate 120 and an arm 130.

  The attachment portion 110 is a portion attached to the laser head 102 of the laser irradiation apparatus. The mounting portion 110 can be screwed to the laser head 102, for example by means of a bridge 110a. However, the mounting method of the mounting portion 110 is not limited to this, and the mounting portion 110 may be fitted with a frame or a band, or may be mounted via a base plate.

  The mounting portion 110 has an arc shape along a perfect circle centered on the optical axis 104 a of the laser head 102 (the center of the lens 102 a. See FIG. 2). And the mounting part 110 is a rail with uniform cross-sectional shape so that it may explain in full detail later.

  The light shielding plate 120 is disposed on the optical axis on the side opposite to the laser head 102 with respect to the object 106 which is the object. The material of the light shielding plate 120 may be any material as long as it can shield laser light, and for example, an aluminum plate can be used.

  The arm 130 connects the mounting portion 110 and the light shielding plate 120 while avoiding the object 106. That is, the arm 130 connects the mounting portion 110 and the light shielding plate 120 at a position substantially parallel to the optical axis and away from the optical axis. A slider 130a is attached to the tip of the arm 130 on the attachment portion 110 side, and the slider 130a is movable on the attachment portion 110 which is a rail.

  FIG. 2 is a view for explaining the positional relationship between the shielding attachment 100 and the object 106. As shown in FIG. 2, the length of the arm 130 needs to be longer than the focal length H 1 of the laser head 102. Then, a width obtained by adding the member width of the object 106 and the total width H2 for the margin to the focal length H1 is the length H3 of the arm 130. The width of the light shielding plate 120 is set to a width that does not extend even when the laser beam 104 sweeps. In addition, it is most efficient that the light shielding plate 120 be circular so that the laser beam 104 does not always protrude even if the light shielding plate 120 rotates.

  FIG. 3 is a perspective view of the shielding attachment 100. As shown in FIG. 3A, even if the laser beam 104 deviates from the object 106, the deviated laser beam 104 is blocked by the light shielding plate 120. Therefore, it is possible to prevent the irradiation of the laser beam 104 to an object other than the object (the object 106), and to prevent the occurrence of a defect such as damage to the object.

  Further, as shown in FIG. 3B, even if the laser beam 104 is largely deviated from the object 106, the laser beam 104 is blocked by the light shielding plate 120. Therefore, it becomes possible to prevent irradiation of the laser beam to objects other than a target object reliably, and to prevent generation | occurrence | production of malfunctions, such as damage of this object.

  4 and 5 are diagrams for explaining the rotation of the arm 130. FIG. In the shielding attachment 100 of the present embodiment in particular, as described above, the mounting portion 110 is a rail of a circular arc centered on the optical axis 104a. As a result, the arm 130 moves the rails of the mounting portion 110, and can rotate around the optical axis as shown in FIG. 4B from the position shown in FIG. 4A.

  According to the above configuration, the position of the arm 130 can be easily moved according to the shape of the object 106. At this time, as shown in FIGS. 4A and 4B, even when the position of the arm 130 is changed, the light shielding plate 120 is always disposed on the optical axis 104a of the laser irradiation apparatus. Therefore, it is possible to reliably obtain the above-described effect.

  Although FIG. 1 shows the posture in which the object 106 extends horizontally, FIG. 5 shows the posture in which the object 106 extends vertically. As described above, even when the direction in which the object 106 is disposed is different, the arm 130 can avoid the object 106 without changing the posture of the laser head 102 by appropriately moving the arm 130. Then, the light shielding plate 120 can be disposed on the optical axis 104 a (see FIG. 4) on the side opposite to the object 106 with respect to the object 106. Therefore, the shielding attachment 100 can be applied regardless of the direction in which the object 106 is arranged, and high versatility can be obtained.

  As another example of the configuration, the arm 130 may be telescopic. In that case, the diameter of the light shielding plate 120 needs to be sufficient to receive the laser beam 104 even when the arm 130 is extended. In addition, a lock lever or a knurled screw for temporary fixing may be attached so that the slider 130a does not move carelessly on the attachment portion 110.

  Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is apparent that those skilled in the art can conceive of various modifications or alterations within the scope described in the claims of the utility model registration, and they naturally fall within the technical scope of the present invention. It is understood that.

  The present invention can be used as a shielding attachment for shielding laser light emitted from a laser irradiation device.

DESCRIPTION OF SYMBOLS 100 ... Shielding attachment, 102 ... Laser head, 104 ... Laser beam, 104a ... Optical axis, 106 ... Object, 110 ... Mounting part, 110a ... Bridge, 120 ... Light-shielding plate, 130 ... Arm, 130a ... Slider

Claims (2)

A shielding attachment for shielding laser light emitted from a laser irradiation device, comprising:
An attachment portion attached to a laser head of the laser irradiation device;
A light shielding plate disposed on the optical axis on the side opposite to the laser head with respect to the target of laser light irradiation;
A shielding attachment comprising: an arm connecting the mounting portion and the light shielding plate while avoiding the object. The mounting portion is a rail of a circular arc centered on the optical axis,
The shield attachment according to claim 1, wherein the arm is movable around the optical axis by moving a rail of the attaching portion.

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