Laser shatterproof device

Abstract

This invention provides a laser scattering prevention device that facilitates the installation and removal of protective coverings when removing rust, paint, and other materials using laser irradiation, and also enables the removal process to be carried out more efficiently. [Solution] A box-shaped structure 1 is constructed to enclose an object P and a worker Q who irradiates the object P with a laser. The box-shaped structure 1 has a rectangular top plate 1A. A pair of cover plates 1B are provided along both longitudinal edges of the top plate 1A in a bendable manner. A pair of reinforcing plates 1C are provided at both longitudinal ends of the top plate 1A in a bendable manner. A pair of opening / closing sheets 1D are provided on the lower side of the reinforcing plates 1C in an opening / closing manner. Connecting devices 2 are provided to connect each cover plate 1B and each reinforcing plate 1C. The box-shaped structure 1 is made self-supporting by the pair of cover plates 1B of the box-shaped structure 1 connected by the connecting devices 2. It is configured so that people can enter and exit the box-shaped structure 1 from the opening side covered by the opening / closing sheets 1D.

Description

Technical Field

[0001] The present invention relates to a laser scattering prevention tool that surrounds an object together with an operator to prevent the scattering of removed substances when removing rust or the like on the surface of the object by laser.

Background Art

[0002] For example, when performing a coating removal operation on a railing of a bridge or the like, there is an operation of irradiating a laser to remove rust, paint, or the like. At this time, dust such as metal and coating film scatters from the object to the surroundings.

[0003] Therefore, conventionally, as shown in FIG. 7, scaffolds S are constructed inside and outside the railing, and a curing sheet R is fixed to this scaffold S to cure the work site.

[0004] On the other hand, as a means for curing scattered substances generated during work, conventionally, a scattering prevention device for a coating material sprayed on a roof is described in Patent Documents 1 to 3.

[0005] The device of Patent Document 1 is provided with a painting booth 10 that moves along the painting surface A. This painting booth 10 has a configuration including a sheet member 11, a frame 12 that supports the sheet member 11, and a caster 13 that moves along the painting surface A.

[0006] Patent Document 2 is a scattering prevention tool in which a first sheet body 3 and a second sheet body 4 are adhered around a frame 2. And it is a configuration in which a hand is inserted into the frame 2 from a position where the second sheet body 4 is turned up to perform spray painting.

[0007] Patent Document 3 is a scattering prevention device that surrounds a painting surface with a frame-shaped enclosure 2 and generates an air curtain 8 by a wind shielding member 3 near the top surface. This enclosure 2 is configured in a frame shape that surrounds four sides other than the top surface and the bottom surface with boards, and an air curtain 8 is provided by the wind shielding member 3 near the top surface to prevent paint from scattering from the top surface.

Prior Art Documents

Patent Documents

[0008] [Patent Document 1] Patent No. 7378785 [Patent Document 2] Japanese Patent Publication No. 2007-237136 [Patent Document 3] Japanese Patent Publication No. 2016-176208 [Overview of the project] [Problems that the invention aims to solve]

[0009] Conventional protective measures for railings and similar structures require constructing scaffolding S both inside and outside the railing and enclosing it with protective sheets R (see Figure 7). Furthermore, if the laser beam directly hits the protective sheet R, metal plates or similar materials may be installed inside the protective sheet R. Thus, protective measures for railings and similar structures require considerable effort for the installation and removal of scaffolding S.

[0010] On the other hand, the anti-scattering devices described in Patent Documents 1 to 3 are all used when painting roofs, and are configured so that the worker inserts their hand into the frame to spray paint. However, these frames get in the way of work when removing rust, paint, etc. from the surface of an object by irradiating it with a laser.

[0011] In other words, when removing rust and other debris with a laser, the distance between the portable laser irradiation device, which is operated with both hands, and the object being treated is crucial. Therefore, with conventional scattering prevention devices, where the operator's hands are inserted into the frame from the outside, it becomes difficult to maintain a consistent distance.

[0012] Moreover, conventional paint scattering prevention devices all involve installing a frame within reach and moving the frame to paint when it becomes out of reach. With laser irradiation, however, moving the frame would require moving the power cable and optical cable connected to the portable laser irradiation device along with the frame, making the movement process inherently difficult.

[0013] Furthermore, transporting and storing conventional scattering prevention devices requires disassembling the frame, which is time-consuming. Also, transporting and storing the frame as is requires a significant amount of storage space.

[0014] In particular, protective work on railings and other structures involves using scaffolding and sheets to enclose a relatively large area of ​​the object, which requires considerable effort for transporting and storing this scaffolding and other equipment. Moreover, protective work on railings and other structures requires a relatively large frame, so if the protective materials are constructed in a frame-like structure, securing space for transportation and storage becomes a challenge.

[0015] Therefore, the present invention was created to solve the above-mentioned problems, and aims to provide a laser scattering prevention device that facilitates the installation and removal of protective materials when removing rust, paint, etc. from an object using laser irradiation, and also enables rational laser removal work. [Means for solving the problem]

[0016] To achieve the above objective, the first means of the present invention is a box body 1 that encloses an object P from which a laser is irradiated to remove material from the surface, and a worker Q who irradiates the object P with a laser. The box body 1 comprises a rectangular top plate 1A, a pair of cover plates 1B that are flexibly provided along both longitudinal edges of the top plate 1A, a pair of reinforcing plates 1C that are flexibly provided at both longitudinal ends of the top plate 1A and are shorter than the cover plates 1B, an openable and closable sheet 1D provided on the lower side of the reinforcing plates 1C, and a connector 2 that detachably connects each cover plate 1B and each reinforcing plate 1C to form the box body 1. The opening / closing sheet 1D is pivotably mounted on the vertical side edge of one of the opposing cover plates 1B, and a fastener 3 is provided to detachably secure the open end of the opening / closing sheet 1D to the vertical side edge of the other cover plate 1B. The box body 1 is made self-supporting by a pair of cover plates 1B connected by a connector 2, and is configured to be accessible from the opening side of the box body 1, which is covered by an opening / closing sheet 1D.

[0018] The 2 The means involves providing an exhaust fan 5 with a HEPA filter on the opening side of the box body 1 that is covered by the opening / closing sheet 1D.

[0019] The3 The box body 1 of the means is configured such that the pair of opening and closing sheets 1D are overlapped on one of the covering plates 1B, the pair of reinforcing plates 1C are overlapped on the top plate 1A, and the top plate 1A is overlapped on the other covering plate 1B.

Effects of the Invention

[0020] According to the present invention, when irradiating an object with a laser to remove rust, paint, etc., the installation work and removal work of the biological agent are facilitated, and the efficiency of the removal work can be increased even for long objects such as guardrails.

Brief Description of the Drawings

[0021] [Figure 1] It is a perspective view showing the usage state of the present invention. [Figure 2] It is a developed view showing an embodiment of the present invention. [Figure 3] It is a perspective view showing an embodiment of the present invention. [Figure 4] It is a schematic plan view showing the usage state of the present invention. [Figure 5] (A) and (B) are plan views showing the folded state of the present invention. [Figure 6] It is a schematic side sectional view showing another embodiment of the present invention. [Figure 7] It is a perspective view showing a conventional curing example.

Modes for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present invention will be described in detail. The present invention is a scattering prevention tool that surrounds the object P together with the worker Q to prevent the scattering of the removed matter when irradiating the object P with a laser to remove surface rust, paint, etc. (see FIG. 1).

[0023] The present invention comprises a box body 1 composed of a top plate 1A, a covering plate 1B, a reinforcing plate 1C, and an opening and closing sheet 1D (see FIG. 3). The top plate 1A is rectangular, and a pair of covering plates 1B are provided so as to be bendable along both longitudinal edges of the top plate 1A (see FIG. 2).

[0024] The materials used for the top plate 1A and the cover plate 1B are selected to be relatively lightweight materials such as plywood (including lightweight plywood) or aluminum plates, and are fire-resistant materials that will not cause inflammation even if they come into contact with sparks generated during laser irradiation. In the illustrated example, the top plate 1A and the cover plate 1B are connected by hinges 4 (see Figure 3).

[0025] The reinforcing plate 1C is a flexible portion provided at both longitudinal ends of the top plate 1A, and is formed to be shorter in length than the cover plate 1B (see Figure 2). In other words, the reinforcing plate 1C that forms the box body 1 is formed to hang down from both longitudinal ends of the top plate 1A (see Figure 3). The material of the reinforcing plate 1C can be the same as that of the top plate 1A, or it can be formed from another material with superior strength.

[0026] The reinforcing plate 1C and the covering plate 1B are connected by a connector 2 to form the box body 1 (see Figure 3). The box body 1 is then supported by the opposing covering plates 1B (see Figure 1).

[0027] The connector 2 shown in the illustration uses a fastener fastener commonly known as a snap lock (see Figure 3). Furthermore, by releasing the connector 2, the box body 1 can be transformed from its assembled state to a flat state (see Figure 2).

[0028] The opening / closing sheet 1D is a part that is movably opened and closed on the lower side of the reinforcing plate 1C, and covers the gap between the opposing cover plates 1B with this opening / closing sheet 1D (see Figure 1). The opening / closing sheet 1D shown is pivotably mounted on one of the vertical side edges of the opposing cover plates 1B. Furthermore, a fastener 3 such as a hook-and-loop fastener is provided at the open end of the opening / closing sheet 1D, and it is detachably attached to the fastener 3 such as a hook-and-loop fastener provided on the vertical side edge of the other cover plate 1B. It is also possible to pivotably connect this opening / closing sheet 1D to the lower end of the reinforcing plate 1C (not shown).

[0029] If the object P is long, like a handrail, it may protrude from the box body 1 (see Figure 4). Therefore, the opening / closing sheet 1D is provided with multiple vertically oriented opening / closing slits 1Da (see Figure 3). The object P is then passed through these opening / closing slits 1Da (see Figure 4). The number and position of these opening / closing slits 1Da can be arbitrarily changed, and it is also possible to create an opening / closing sheet 1D without opening / closing slits 1Da.

[0030] Furthermore, in the process of removing rust, paint, etc. by irradiating with a laser, a portable laser irradiation device T operated by the worker and an externally installed laser oscillator (not shown) are connected by line T1 (see Figure 4). Power cables and optical cables are routed through this line T1, and the opening and closing slits 1Da of the opening and closing sheet 1D are configured to pass through this line T1.

[0031] An exhaust fan 5 with a HEPA filter is provided on the opening end side covered by the opening / closing sheet 1D (see Figure 1). By exhausting the air in the workspace with this exhaust fan 5, harmful substances and dust are prevented from leaking to the outside. Moreover, by exhausting at this position, negative pressure is created in the workspace, so outside air can flow in and out without completely sealing it with the opening / closing sheet 1D. The opening / closing slit 1Da is opened to match this exhaust fan 5.

[0032] In this invention, the box body 1 is used during work, but when work is finished, the box body 1 is folded and stacked in a flat shape for storage (see Figure 5). First, the opening / closing sheet 1D is placed on one of the cover plates 1B, and the reinforcing plate 1C is placed on the top plate 1A (see Figure (a)). Next, the top plate 1A is placed on the other cover plate 1B (see Figure (b)). At this time, the reinforcing plate 1C and the opening / closing sheet 1D do not overlap but are placed side by side. As a result, it can be folded to less than half its area.

[0033] The worker Q is configured to open the opening / closing sheet 1D and enter the inside of the box 1 (see Figure 4). Furthermore, this box 1 can be expanded to provide an internal space where at least two workers Q can work on the object P simultaneously from both sides (see Figure 6). As a result, it becomes possible to work on the object P simultaneously from both sides.

[0034] Furthermore, the configuration of the illustrated box 1, as well as the connectors 2, fasteners 3, exhaust fan 5, and other components, are not limited to the illustrated examples, and modifications can be freely made without altering the essence of the present invention. [Explanation of Symbols]

[0035] P Object Q Worker R Protective Sheet S Scaffolding T Portable laser irradiation device T1 Line 1 box body 1A Top plate 1B Covering board 1C Reinforcement Plate 1D Open / Close Sheet 1Da Opening / Closing Slit 2. Connectors 3 Fixtures 4 hinges 5. Exhaust fan 6. Flame-retardant sheet

Claims

1. A laser scattering prevention device comprising a box-shaped structure surrounding an object from which a laser beam is irradiated to remove material from its surface, and a worker irradiating the object with a laser, the box-shaped structure comprising a rectangular top plate, a pair of cover plates provided to bend along both longitudinal edges of the top plate, a pair of reinforcing plates provided to bend at both longitudinal ends of the top plate and shorter than the cover plates, an openable / closable sheet provided to open and close on the lower side of the reinforcing plates, and a connector that detachably connects each cover plate and each reinforcing plate to form the box-shaped structure, wherein the openable / closable sheet is pivotably provided on the vertical side edge of one of the opposing cover plates, and a fixing device is provided to detachably fix the open end of the openable / closable sheet to the vertical side edge of the other cover plate, the box-shaped structure being made self-supporting with the pair of cover plates of the box-shaped structure connected by the connector, and the configuration being such that entry and exit are made from the opening side of the box-shaped structure covered by the openable / closable sheet.

2. The laser shatter prevention device according to claim 1, further comprising an exhaust fan with a HEPA filter on the side of the opening of the box body that is covered by the opening / closing sheet.

3. The laser shatter prevention device according to claim 1, wherein the box is configured such that a pair of opening and closing sheets are placed on one of the cover plates, a pair of reinforcing plates are placed on the top plate, and the top plate is placed on the other cover plate.

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