JP2014015750A - Surface treatment booth for steel frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface treatment booth for a steel frame capable of ensuring a safe work environment for workers by preventing dust scattering in surface preparation or open blast, and avoiding environment contamination in surface treatment such as open blast, spray coating or coating in a structure where the steel frame is exposed.SOLUTION: A surface treatment booth (booth 100) for a steel frame comprises: a plurality of end face members (upper end face member 110, lower end face member 130) mounted to a steel frame 12 and form an end face of a work space; a sheet 150 spread over the plurality of end face members to form the work space around the steel frame; and clips 128, 148 disposed in outer peripheral parts of the end face members to fix the sheet. The sheet is comprised of a plurality of divided sheets 152a-152f which are divided in a direction of winding around the steel frame, and the divided sheets are joined with each other by hook-and-loop fasteners 154a-154l mounted to end sides of the divided sheets.

Description

  The present invention relates to a booth for surface treatment used for blasting, surface preparation, roughening, thermal spraying, sealing treatment, and coating on the surface of a steel frame.

  The power transmission tower is subjected to anticorrosion treatment by applying hot dip galvanizing to the surface of the steel material during construction. However, due to the influence of various corrosive factors in the natural environment, the plating layer wears out and repair is necessary. In particular, in areas affected by sea salt particles and heavy industrial areas where the concentration of chemical substances is high, pitting corrosion and thinning of steel materials tend to occur.

  When the plating layer disappears due to corrosion and the iron ground is exposed, rust progresses rapidly. Therefore, if rust is found, repair is performed (until rust occurs, the degree of thinning is not known). In conventional repairs, the base is adjusted (rusted off) and then rust-proofed. In general, the rust-proof coating is applied with an undercoat paint (rust inhibitor) and a topcoat paint (color / gloss retention, weather resistance maintenance) (for example, Patent Document 1).

  However, since repairs are naturally performed locally, wire brushes, sanders, jet chiseles, etc. are used to prepare the substrate. With these means, only two types of kelen (the degree of removal of surface rust on old paint films and galvanized plates) can be performed, and only one type of keren (completely removes rust and gives a glossy surface). Keren) cannot be done. In addition, in the base adjustment of about two kinds of keren, the rust of the uneven portion or the narrow portion cannot be removed, and corrosion proceeds due to the rust remaining under the coating.

  Moreover, compared with the painting construction performed in the factory, the construction environment performed in the field is worse than the construction environment, and it is difficult to ensure the quality including the substrate adjustment, so that there is a problem that the adhesion performance and the shielding effect of the coating film are weak. Because of these factors, the effects of conventional incomplete substrate adjustment (type 2 Keren) and repair by painting are not so great, and re-repair is required in just a few years. Moreover, since the thickness reduction of steel materials also accompanies in that case, the time of member replacement will also be advanced.

  In addition, as a replacement for the repair by painting, there are partial or full replacement of members and rebuilding of a steel tower. However, replacement of a member requires a large amount of cost because a jig for temporarily supporting a load is created or a scaffold is assembled to make a long-term construction. In particular, when the member to be replaced is a main pillar material, a bracelet main material (stress material), or the like, it is accompanied by a long-term suspension of power transmission.

  Various structures such as emergency staircases in buildings, radio towers, steel pipe columns for signals and utility poles, guard rails, etc. are installed in structures with exposed steel frames. And they all have similar challenges.

JP 2004-148163 A Japanese Patent No. 4502622

  In order to prevent deterioration of steel tower members and prolong the service life, it is important to enhance the effect of repair. For that purpose, it is important to perform as much as almost one kind of selenium as well as the uneven part and the narrow part as well as the flat part, and to make a rust preventive film having a high shielding effect and high durability.

  Here, one kind of keren is supposed to be performed by open blasting. Open blasting is blasting that does not collect abrasives at the same time as work. That is, it is conceivable that kelen in the steel tower is also performed by open blasting. In fact, there is an example where Keren was performed by open blasting when repainting the bridge (Ishikawa Ohashi, Ishikawa Prefecture: repainting work in 2008).

  However, when open blasting is performed on a steel frame locally, there is an environmental problem that a large amount of abrasive is scattered around. If it is installed in the factory, the problem can be solved even if the abrasive material is scattered, but the steel tower is a building installed on the ground and works at a high place. There is a risk of getting on the residential areas, roads, fields and rivers. For this reason, it was impossible to perform keren by open blasting in a steel tower.

  Generally, vacuum blasting is used for repair blasting on site where curing is not possible. It is a blasting device that recovers the projected abrasive material immediately by vacuum, but it can handle only the flat part, and the abrasive material scatters in an unexpected direction at the edge, uneven part and narrow part, It cannot be recovered by vacuum and is difficult to use on a steel tower.

  On the other hand, as a coating having a high shielding effect and high durability, it is conceivable to form a sprayed coating. Although the thermal spraying apparatus can be roughly classified into electric spraying and gas spraying, the applicants have proposed a thermal spraying machine capable of thermal spraying at a low temperature as a kind of electric arc spraying machine (Japanese Patent Application No. 2010-146614). Thermal spraying is effective for the subsequent corrosion prevention because it can form a film of aluminum, aluminum magnesium, tin, etc. based on zinc, which has a sacrificial anticorrosion effect.

  Roughening is required to ensure that the sprayed coating with high shielding effectiveness and high durability adheres to the local steel frame. In Patent Document 2 (Patent No. 4502622), if a substrate having an average roughness (Ra) of 2 to 10 μm is obtained on the surface of the sprayed body with an electric tool or the like in which abrasive grains are fixed to a disk-shaped or belt-shaped substrate, It is said that the thermal spray coating is in close contact. However, a disk-shaped or belt-shaped power tool can be roughened only at a flat surface, and roughening is difficult at a step, an uneven portion, or a narrow portion. Further, Patent Document 2 tries to strictly control the roughness of the rough surface (the average roughness Ra is 2 to 10 μm, more preferably 5 to 8 μm is optimal), but in open blasting, Since a substrate having an average roughness (Ra) of 20 μm or more can be easily obtained, if an appropriate grain size of the abrasive is selected, it is not necessary to manage the roughness and a strong adhesion can be obtained. However, Patent Document 2 also describes that blasting at high places is difficult to apply because it is difficult to collect abrasives and dust (paragraph 0009, etc.).

  Also in thermal spraying, not all of the metal that is melted and sprayed adheres to the workpiece, and moreover, there are more materials that dissipate in the angle materials and steel pipes of steel towers. Therefore, a large amount of dust is generated if not as much as open blasting. For this reason, as with open blasting, it is difficult to form a thermal spray coating without spraying thermal spray dust to repair a steel tower.

  Here, if the object to be repaired is small, it may be possible to prevent dust from scattering by covering the whole with a curing sheet or the like. However, in a large structure such as a steel tower, it is unrealistic to cover the whole without a gap.

  In view of the above-mentioned problems, the present invention prevents the scattering of kelen and open blast dust in structures where the steel frame is exposed, avoids environmental pollution in surface treatment such as open blast, thermal spraying and painting, and is safe for workers. The object is to provide a booth for surface treatment of steel that can secure a working environment.

  In order to solve the above problems, a typical structure of a steel surface treatment booth according to the present invention is stretched over a plurality of end surface members that are attached to the steel frame and form an end surface of a work space, and a plurality of end surface members. A sheet that forms a work space around the steel frame, and a clip that is disposed on the outer peripheral portion of the end surface member and fixes the sheet, and the sheet includes a plurality of divided sheets that are divided in a direction in which the steel frame is wound, It joins mutually by the hook-and-loop fastener attached to the edge of a division | segmentation sheet | seat.

  According to the above configuration, it is possible to construct a space along the steel frame that can prevent dust from being scattered very easily, and the worker is outside the booth and is provided with a working hole in the seat to install a machine such as a nozzle. Insert and process steel. Therefore, by attaching this booth to the place to be repaired, removing it after it has been repaired, and attaching it to the place to be repaired next time, it is possible to work to generate dust on the entire structure where the steel frame is exposed. it can. Then, it becomes possible to perform base preparation and metal spraying by open blasting even in outdoor high place work like a steel tower, and repair with high reliability and durability can be performed. As a result, the repair interval can be lengthened, and the period until replacement of the member can be greatly extended, so that the cost required for maintenance can be greatly reduced. In addition, it is possible to paint with a spray instead of a brush, and the convenience can be dramatically improved.

  Here, because the steel tower is constructed by joining a plurality of steel frames and auxiliary materials (brace materials), there are some places where there is only one steel frame, and there are places where there is only one steel frame. A booth may also be required at the contact point where the brace material is joined. At this time, conventionally, a sheet of one sheet is appropriately cut with a cutter while being wound around a steel tower, and an excess cut is covered with a curing tape. However, this method is time consuming and difficult to seal, and the blast material is likely to leak.

  In contrast to the above-described conventional technique, in the present application, the sheet forming the work space is composed of a plurality of divided sheets. By using the divided sheets divided in advance in this way, it is not necessary to cut at the work site and can be easily and reliably joined by the hook-and-loop fastener, so that the gap can be eliminated and the blast material can be prevented from leaking. Moreover, since the joint line of a division | segmentation sheet | seat is joined by a surface fastener, it can open and close arbitrary ranges in arbitrary places along the longitudinal direction (axial direction of a steel frame) of a booth. Therefore, it is not necessary to open an inspection window or a work port, which will be described later, and labor can be saved. Furthermore, according to the above configuration, it is possible to easily change the position of the observation window and the work port even if the blasting operation position is slightly moved from the upper part to the lower member, so that the work of rearranging the booth is not necessary, and the work is further improved. It is possible to save labor.

  The joining portion between the divided sheets may be joined in a direction in which both ends of the divided sheets on both sides protrude outward. Thereby, since a surface fastener can be pinched and crimped | bonded, a some division | segmentation sheet | seat can be joined easily and reliably.

  The booth for surface treatment further includes a viewing window having a surface fastener attached to an end face of a transparent plate material, and the viewing window is inserted into the joint of the divided sheet, and the surface fastener of the viewing window and the surface of the divided sheet Fasteners should be joined. Thereby, the observation window for observing the inside of the surface treatment booth can be easily installed, and good workability can be obtained.

  The surface treatment booth further includes a work port having a surface fastener attached to the outer peripheral surface of the cylinder, and the work port is inserted into the joint of the divided sheets to join the surface fastener of the work port and the surface fastener of the divided sheet. It is good to have. Thereby, the insertion port for inserting a hand or a blast hose at the time of work can be secured easily, and good workability can be obtained.

  The working port may include a main cylinder for inserting a hand and a sub cylinder for branching from the main cylinder and inserting a work tool. If both the hand and the blast hose are inserted into one working port, there is a concern that a gap is generated between them and the blast material leaks out. On the other hand, by adopting a configuration in which the hand and the blast hose are inserted separately as described above, it is possible to prevent the generation of a gap and the leakage of the blast material.

  The clip may be provided on a side surface of the end surface member and may be a slider that can move obliquely so as to approach the side surface of the end surface member, and the divided sheet may be sandwiched between the slider and the side surface of the end surface member. With such a configuration, the divided sheets can be clamped simply by moving the clip (slider) up and down, so that the attachment and removal of the sheets, and the installation and disassembly of the surface treatment booth can be easily performed.

  The end face member is divided into a plurality of parts, and is configured to sandwich and fix the steel frame by combining a plurality of parts, and one of the combined parts has a fastening bolt, and the other The part may have a dharma hole through which the head of the bolt is inserted. With this configuration, the end surface can be projected in all directions around the steel frame. In particular, when using bolts for fastening, by providing a dharma hole in the other part (receiving member) as described above, high strength can be obtained in the receiving member and strong fastening is possible. It becomes. In addition, the fastening bolt can be slid in the slit provided in the end face member so that the fastening position can be adjusted according to the width of the steel frame, and can flexibly cope with steel frames of different widths. it can.

  According to the present invention, in the structure where the steel frame is exposed, the scattering of kelen and open blast dust is prevented, environmental pollution in the surface treatment such as open blast, thermal spraying and painting is avoided, and the worker's safe working environment is achieved. Can be secured.

It is a figure explaining the structure of the booth for surface treatment of the steel frame concerning this embodiment. It is a figure explaining the structure of an upper end surface member. It is a figure explaining the structure of a lower end surface member. It is a figure explaining the coupling | bonding of a 1st member and a 2nd member. It is a figure explaining the detail of a sheet | seat. It is a figure explaining a peep window. It is a figure explaining a work mouth. It is a figure explaining joining of the division sheet in the contact part vicinity of a steel frame and an auxiliary material. It is a figure explaining the surface treatment method using a booth.

  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 embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram illustrating the configuration of a steel surface treatment booth (hereinafter simply referred to as “booth 100”) according to the present embodiment. The booth 100 is roughly composed of an upper end surface member 110 and a lower end surface member 130, a sheet 150 stretched between them, and clips 128 and 148 for fixing the sheet 150 to the upper end surface member 110 and the lower end surface member 130. The The booth 100 is used by being attached to a steel frame. In FIG. 1, as an example of a steel frame, a steel frame 12 (main column material) and an auxiliary material 14 (both angle irons) of a steel tower 10 (see FIG. 9) are drawn. Yes.

  The upper end surface member 110 and the lower end surface member 130 are both attached to the steel frame 12 and form end surfaces 112 and 132 of the work space substantially orthogonal to the axial direction of the steel frame 12. In addition, the shape of the outer periphery of the upper end surface member 110 and the lower end surface member 130 may be any shape such as a circle or a polygon in addition to the quadrangle exemplified in the present embodiment.

  A plurality of clips 128 are arranged on the entire outer peripheral surface of the upper end surface member 110, and the upper edge of the sheet 150 can be sandwiched and fixed (gripped). Similarly, a plurality of clips 148 are arranged on the outer peripheral surface of the lower end surface member 130 over the entire periphery, and can be fixed with the lower edge of the sheet 150 interposed therebetween. Note that the number (interval) of the clips 128 and 148 is not limited, and may be a number (interval) that does not cause dust to be ejected from the inside.

  FIG. 2 is a diagram illustrating the configuration of the upper end surface member 110. FIG. 2A is a perspective view of the upper end surface member 110 observed from above, and FIG. 2B is a perspective view of the upper end surface member 110 observed from below. As shown in FIG. 2A, in this embodiment, the upper end surface member 110 is composed of a plurality of parts, that is, an L-shaped first member 114 and a substantially square second member 116. As shown in FIG. 2B, the first member 114 and the second member 116 of the present embodiment have a box shape with an open bottom surface. The top surface 114a of the first member 114 and the top surface 116a of the second member 116 together constitute an end surface 112 (see FIG. 1) of the upper end surface member 110.

  In the present embodiment, in the second member 116, the surfaces (side surfaces 116b and 116c) adjacent to the first member 114 are inserted into the second slit holes 124a and 124b extending in the horizontal direction and the second slit holes 124a and 124b. The fastening bolts 126a and 126b (butterfly bolts) are provided. The bolts 126a and 126b can slide in the horizontal direction in the second slits 124a and 124b. On the other hand, on the surface (side surfaces 114b and 114c) adjacent to the second member 116 in the first member 114, insertion holes 121a and 121b having diameters through which the heads of the bolts 126a and 126b can be inserted, and the insertion holes 121a and 121b. Dharma holes 120a and 120b formed of first slit holes 122a and 122b extending in the horizontal direction are formed.

  Further, in the present embodiment, an opening 118 for collecting dust is provided on the top surface 114 a of the first member 114. By attaching a vacuum type dust collector (not shown) to the opening 118, it is possible to sequentially collect dust generated in the booth 100 during work. As a result, it is possible to prevent the dust from rising in the booth 100 and to ensure good visibility within the booth 100.

  FIG. 3 is a diagram illustrating the configuration of the lower end surface member 130. 3A is a perspective view of the lower end surface member 130 observed from above, and FIG. 3B is a perspective view of the lower end surface member 130 observed from below. As shown in FIG. 3A, the lower end surface member 130 is composed of a plurality of parts, that is, an L-shaped first member 134 and a substantially square second member 136, similar to the upper end surface member 110. ing. As shown in FIG. 3B, the first member 134 and the second member 136 also have a box shape with the top surface opened in the lower end surface member 130, and the bottom surface 134 a of these first members 134 and Together, the bottom surface 136a of the second member 136 constitutes an end surface 132 (see FIG. 1) of the lower end surface member 130.

  In the present embodiment, similarly to the second member 116 of the upper end surface member 110, the second member 136 also includes the second slit holes 144 a and 144 b on the surfaces adjacent to the first member 134 (side surfaces 136 b and 136 c), and the second member 136. The fastening bolts 146a and 146b are provided respectively. The bolts 146a and 146b can also slide in the horizontal direction in the second slit holes 144a and 144b. Also in the first member 134, similarly to the first member 114 of the upper end surface member 110, an insertion having a diameter capable of inserting the heads of the bolts 146 a and 146 b into the surfaces (side surfaces 134 b and 134 c) adjacent to the second member 136. Dharma holes 140a and 140b are provided by combining the holes 141a and 141b and the first slit holes 142a and 142b, respectively.

  Further, two openings 138 a and 138 b for collecting dust are provided on the bottom surface 134 a of the first member 134, and an opening 138 c for collecting dust is provided on the bottom surface 136 a of the second member 136. Since dust falls by gravity at the lower end surface member 130, it is sufficient to simply connect a dust bag to the openings 138a, 138b, and 138c.

  FIG. 4 is a view for explaining the coupling of the first member 134 and the second member 136. The adjacent side surfaces of the first member 114 and the second member 116 of the upper end surface member 110 and the adjacent side surfaces of the first member 134 and the second member 136 of the lower end surface member 130 all have the same structure. Are combined by the same method. Therefore, the case where the side surface 134c of the first member 134 and the side surface 136c of the second member 136 are coupled will be described below as an example.

  As shown in FIG. 4, the head of the bolt 146b of the second member 136 is inserted into the insertion hole 141b of the dull hole 140b of the first member 134, and the shaft of the bolt 146b is connected to the first slit hole 142b and the second slit hole 144b. (See FIG. 3A) and tighten the bolt 146b. Thereby, as shown in FIG. 1, the lower end surface member 130 which consists of the 1st member 134 and the 2nd member 136 is fixed to it in the state which pinched | interposed the steel frame 12. As shown in FIG. As described above, the lower end surface member 130 is divided into a plurality of parts including the first member 134 and the second member 136, so that the end surface 132 can be projected in all directions around the steel frame 12. The same effect can be obtained in the upper end surface member 110. Further, since the bolt 146b can slide in the horizontal direction by the first slit hole 142b and the second slit hole 144b, the fastening position can be adjusted according to the width of the steel frame 12.

  In the present embodiment, a configuration in which a dull hole is formed in the first member and a bolt is provided in the second member is illustrated. However, the present invention is not limited to this, and a reverse configuration is also possible. In addition, the connecting structure of a plurality of parts may be a so-called fitting fixing in which the first member or the second member is provided with a hook on one of the parts adjacent to the other and the side of the other part is engaged with the hook. It may be tightened with a C clamp or fixed with a patch lock. Furthermore, you may comprise so that several parts may be connected with the hinge and it may open and close and the steel frame 12 may be pinched | interposed. However, when the hooks are engaged with each other as described above, the rigidity is low, and there is a risk of rattling when fixed. Therefore, it is preferable to fix by bolting like this embodiment.

  Here, if the bolts are simply tightened, there is a risk of causing a bolt drop accident at the time of work. For this reason, when using a bolt, it is necessary to make the bolt engaged with one part. Then, in order to insert the bolt into the other part, the vicinity of one end of the slit must be cut out in the other part, and the rigidity in the vicinity of the slit is reduced.

  On the other hand, in the present embodiment, since the dharma hole through which the head of the bolt can be inserted is formed in the first member (the other part to be combined), the bolt is inserted into the first member without forming a notch. be able to. Therefore, it is possible to obtain a high strength in the first member (the other part) while preventing accidents of dropping the bolts and ensuring work safety, and to strengthen the first member and the second member (a plurality of parts). It becomes possible to conclude to.

  FIG. 5 is a diagram illustrating details of the sheet 150, FIG. 5A is a diagram illustrating an operation of fixing the sheet 150 to the upper end surface member 110, and FIG. 5B is a diagram illustrating the sheet 150 in the horizontal direction. FIG. The sheet 150 is stretched around the outer periphery of the upper end surface member 110 and the lower end surface member 130, thereby forming a work space around the steel frame 12 (see FIG. 1). In the case where the sheet 150 is thermally sprayed, it is preferable to use a resin whose main material is polypropylene or vinyl chloride having high heat resistance. As will be described later, the sheet 150 of the present embodiment includes a plurality of divided sheets 152a to 152f divided in a direction in which the steel frame 12 is wound, and is a surface fastener attached to each end of the divided sheets 152a to 152f. They are joined together by 154a to 154l.

  When the work space is formed by the sheet 150, first, the upper end of the sheet 150 (strictly, the divided sheets 152 a to 152 f) is attached to the upper end surface member 110. As described above, a plurality of clips 128 are arranged on the outer peripheral surface (side surface) of the upper end surface member 110, and the upper end of the sheet 150 can be attached to the upper end surface member 110 by the plurality of clips 128.

  In particular, in the present embodiment, the clip 128 is a slider that can move obliquely so as to approach the side surfaces of the end face members (the upper end face member 110 and the lower end face member 130). Then, as shown in FIG. 5A, the upper end of the sheet 150 is brought into contact with the side surface of the upper end surface member 110, and the clip 128 is slid downward so as to approach the side surface of the upper end surface member 110. Accordingly, the upper end of the sheet 150 is fixed to the upper end surface member 110 by being sandwiched between the lower side of the clip 128 and the side surface of the upper end surface member 110. Although not illustrated, when the lower end of the sheet 150 is attached to the lower end surface member 130, the lower end of the sheet 150 is brought into contact with the side surface of the lower end surface member 130 so as to approach the side surface of the lower end surface member 130. Slide the clip 148 upward.

  By using the clips 128 and 148 as sliders as in the above configuration, the sheet 150 can be clamped and fixed to the end face member simply by moving it up and down. Further, the sheet 150 can be removed from the end surface member by sliding the clip 128 upward in the upper end surface member 110 and sliding the clip 148 downward in the lower end surface member 130. Therefore, according to the configuration of the present embodiment, it is possible to easily attach and remove the seat 150 only by moving the clips 128 and 148 up and down.

  When the upper end and the lower end of the sheet 150 (divided sheets 152a to 152f) are fixed to the upper end surface member 110 and the lower end surface member 130 by the clips 128 and 148, the plurality of divided sheets 152a to 152f are joined. As described above, in the present embodiment, the surface fasteners 154a to 154l are attached to the end edges of the divided sheets 152a to 152f (see FIG. 5B), and the end edges of the adjacent divided sheets 152a to 152f are used. By crimping the knobs and hook-and-loop fasteners 154a to 154l, the plurality of divided sheets 152a to 152f are joined to form one large sheet 150.

  In addition, as shown in FIG.5 (b), the junction part of division | segmentation sheets is good to join in the direction where both the edge sides of division sheet | seat 152a-152f of both sides protrude outside. If the joint between adjacent split sheets covers the other split sheet on the outer surface of one split sheet, i.e., joined by pulling, the joint between the split sheets is pressed from both sides (outside and inside). Since it cannot be inserted, there is a possibility that the pressure bonding becomes insufficient and a gap is generated at the joint.

  On the other hand, according to the configuration of the present embodiment, since the joint portions of the divided sheets protrude outwardly, the joint portions can be pinched from both sides to be crimped, and the plurality of divided sheets 152a to 152f can be bonded. Easy and reliable joining is possible. Moreover, in the booth 100 of this embodiment, although the observation window 160 and the work port 170 are provided in the junction part of divided sheets so that it may mention later (refer FIG. 1), both the junction parts of divided sheets are outside as mentioned above. It is possible to prevent the occurrence of a gap when installing a viewing window or a work opening.

  As described above, according to the booth 100 of the present embodiment, the upper end and the lower end of the sheet 150 (divided sheets 152a to 152f) are fixed to the upper end surface member 110 and the lower end surface member 130 by the clips 128 and 148. By joining the surface fasteners 154a to 154l at the end edges of the 152a to 152f, a work space surrounded by the booth 100 can be easily formed around the steel frame 12. Therefore, it is not necessary to take a time-consuming work of cutting a sheet as appropriate with a cutter while winding it around the steel tower 10 and closing the excess cut with a curing tape as in the prior art, and the work efficiency can be greatly improved. Also, by joining the divided sheets 152a to 152f with the hook-and-loop fasteners 154a to 154l, it is possible to easily and surely seal those joints, which is suitable for leakage of the blast material that tends to occur in the conventional method. It is possible to prevent.

  Here, it is desirable that the material of the sheet 150 forming the work space is transparent so that the inside can be easily understood. However, when dust adheres to the sheet, visibility is easily deteriorated, and grinding is performed when blasting is performed inside. Transparency is lost as soon as it is damaged by the material. For this reason, the sheet 150 may be a composite sheet in which fibers are included in a mesh shape in preference to robustness rather than transparency. In that case, as shown in FIG. 1, it is good to provide the observation window 160 for observing the inside of the booth 100 in the junction part of divided sheets.

  FIG. 6 is a view for explaining the inspection window 160, FIG. 6 (a) is a front view and a side view of 160, and FIG. 6 (b) is a view for explaining the mounting operation of the inspection window 160. As shown in FIG. 6A, the observation window 160 is composed of a transparent plate 162 and a surface fastener 164 attached to the end face thereof. As the plate material 162, a transparent resin plate such as polycarbonate or acrylic that is hard and hard to be damaged can be suitably used. Further, it is preferable to use a fine mesh-like metal that does not allow the abrasive to pass through in place of the transparent plate 162 because the visibility does not deteriorate due to damage.

  When attaching the inspection window 160 to the sheet 150 (in FIG. 6B, the divided sheets 152c and 152d are illustrated), as shown in FIG. 6B, first, as shown in FIG. ) Is partially opened, and the observation window 160 is inserted into the opening, and the surface fastener 164 of the observation window 160 and the surface fasteners 154d and 154e of the divided sheets 152c and 152d are joined. Thereby, the inspection window 160 is attached to the junction part of the division | segmentation sheet | seats 152c * 152d (refer FIG. 1). As described above, according to the configuration of the present embodiment, a conventional work such as cutting a sheet of one sheet to make a hole, arranging a viewing window in the hole, and covering the periphery with tape is performed. The observation window 160 can be easily attached.

  In the present embodiment, the shape of the observation window 160 (strictly, the plate material 162) is a rhombus, but is not limited thereto. However, the upper and lower angles of the viewing window 160 are preferably acute angles. If it is not an acute angle, for example, if the viewing window 160 is circular, the opening angle of the surface fasteners 154d and 154e of the divided sheets 152c and 152d becomes wide, so there is a concern that gaps are likely to occur. is there.

  7A and 7B are diagrams for explaining the work opening 170, FIG. 7A is a front view and a side view of the work opening 170, and FIG. 7B is a view showing how the work opening 170 is used. As shown in FIG. 1, in the present embodiment, a working port 170 serving as an insertion port for inserting a hand or a blast hose is further provided below the observation window 160. As shown to Fig.7 (a), the work port 170 is provided with the cylinder 172 and the surface fastener 178 attached to the outer peripheral surface.

  According to the above configuration, as in the case where the viewing window 160 is attached to the sheet 150, a part of the joint (joint) of the divided sheets 152c and 152d is opened, and the work port 170 is inserted into the opening, and the surfaces thereof By joining the fasteners, as shown in FIG. 7B, the work port 170 can be attached to the joining portion of the divided sheets 152c and 152d. Therefore, the work port 170 can be easily attached without requiring cutting of the sheet or patting with a tape.

  As described above, by attaching the work port 170 to the joint portion of the plurality of divided sheets, the joint portion does not close even when the hand or the blast hose is pulled out from the booth 100, so that good workability is ensured. be able to. Moreover, as shown to Fig.7 (a), when the horizontal width of the cylinder 172 is long, it is possible to suppress the leakage of the blast material from the opening of the work port 170.

  Furthermore, in this embodiment, the cylinder 172 of the work port 170 is branched from the main cylinder 174 for inserting the hand 230, and the sub-cylinder 176 for branching from the main cylinder 174 to insert the blast hose 216 as a work tool. Consists of. If the cylinder 172 is composed of only the main cylinder, and both the hand 230 and the blast hose 216 are inserted into the main cylinder, when a gap is generated between the hand 230 and the blast hose 216, the blast is generated therefrom. Material may leak out. On the other hand, by adopting a configuration in which the hand 230 and the blast hose 216 are inserted separately as in the present embodiment, there is no gap between them, and it is possible to suitably prevent leakage of the blast material. Become.

  In this embodiment, the case where the blast hose 216 is inserted from the sub-cylinder 176 in FIG. 7B is described as an example. However, the present invention is not limited to the blast hose 216, and the gun torch 224 for thermal spraying is used. It is also possible to perform work by inserting a work tool such as spray or spray (not shown).

  FIG. 8 is a diagram illustrating the joining of the divided sheets in the vicinity of the contact portion between the steel frame 12 and the auxiliary material 14. FIG. 8 illustrates the divided sheets 152e and 152f. Here, the steel tower 10 is generally configured by joining a plurality of steel frames and auxiliary materials (brace materials) (see FIG. 9). For this reason, the place where the surface treatment is performed in the steel tower 10, that is, the place where the booth 100 is installed may be a place where there is only one steel frame 12, or in the vicinity of the contact portion where the steel frame 12 and the auxiliary material 14 are joined. In some cases. Moreover, the structure comprised not only with the steel tower 10 but with the steel frame has the auxiliary material 14 (brace material) and the beam in many places, and there may be the auxiliary material 14 in the place which installs the booth 100. Fully assumed.

  When using a single sheet as in the prior art, even if there is only one steel frame 12 as described above, a single sheet is wound around a steel tower with an appropriate cutter and the excess cut is cured. If the booth 100 is located near the contact point between the steel frame 12 and the auxiliary material 14 even though it takes time to close the tape with the tape, a sheet is further cut to pass the auxiliary material 14, and the auxiliary material 14 is further passed therethrough. The work of glazing with a curing tape is required. For this reason, when installing a booth in the vicinity of the contact portion between the steel frame 12 and the auxiliary material 14, there is a problem that the installation work becomes more complicated and the sealing becomes more difficult, so that the blast material is more likely to leak. . In addition, according to the conventional method, the work for cutting the sheet is performed in order to form the opening through which the auxiliary material 14 is passed. It was difficult to cover.

  On the other hand, in the present embodiment, the sheet 150 forming the work space includes a plurality of divided sheets 152a to 152f. For this reason, as shown in FIG. 8 (a), the auxiliary material 14 is arranged with a part of the joint between the divided sheets 152e and 152f being opened, and the surface fasteners 154j and 154k of the divided sheets 152e and 152f (FIG. 5B). 2), the sheet 150 can be easily stretched around the auxiliary material 14. Therefore, it is not necessary to cut the sheet in order to form the opening through which the auxiliary material 14 is passed, the workability can be improved, and the booth is set to a height of about 5 to 6 m in the vertical direction so that a wide range can be obtained at a time. It becomes possible to cover. Further, since the sheet 150 does not need to be cut, the sheet 150 can be reused.

  Here, when the auxiliary material 14 is arranged by partially opening the joint portion of the divided sheets 152e and 152f as described above, a gap may be generated between the divided sheets 152e and 152f depending on the shape of the auxiliary material 14. is assumed. Therefore, in the present embodiment, a sealing material 180 (shown by hatching in FIG. 8A) is disposed between the auxiliary material 14 and the divided sheets 152e and 152f. Thereby, the clearance gap between the auxiliary | assistant material 14 and the division | segmentation sheet | seat 152e * 152f can be sealed suitably, the sealing performance of the booth 100 can be improved, and the leakage of a blast material can be prevented.

  As the sealing material 180, for example, foamed resin such as urethane foam, rubber, or the like can be used. However, the present invention is not limited to this, and other materials can be used. Further, in this embodiment, the gap is sealed using the sealing material 180, but this is not limited, and even if the gap between the auxiliary material 14 and the divided sheets 152 e and 152 f is eliminated by covering with a curing tape, Good.

  FIG. 8B shows another example of joining the divided sheets in the vicinity of the contact portion between the steel frame 12 and the auxiliary material 14. In FIG. 8B, of the divided sheets 152e and 152f located on both sides of the auxiliary material 14, a portion (hereinafter, referred to as a horizontal portion 14a) extending in the horizontal direction of the auxiliary material 14 on the divided sheet 152e. The notch 153a corresponding to is formed. According to this configuration, the horizontal portion 14a of the auxiliary member 14 is inserted into the notch 153a, and the upper and lower portions of the auxiliary member 14 are sealed by joining the surface fasteners 154j and 154k of the divided sheets 152e and 152f. By booting only the location with the curing tape, the booth 100 can be sealed without the need for a sealing material.

  In the configuration of FIG. 8B, since the cut 153a is formed in the divided sheet 152e, it is difficult to reuse the divided sheet 152e, but other divided sheets can be reused, and the cut 153a is formed. It is sufficient to replace only the divided sheet 152e. For this reason, since it is not necessary to exchange the whole sheet | seat like the case where the cut | notch was provided in the sheet | seat of 1 sheet | seat like before, cost reduction can be aimed at.

  As described above, according to the booth 100 according to the present embodiment, it is possible to construct a space along the steel frame 12 that can prevent dust from being scattered, and an operator can install a work tool such as a nozzle on the booth. The steel frame 12 can be processed from outside the booth 100 by being inserted into the booth 100. Then, the booth 100 is attached to a place to be repaired, removed after the repair is completed, and is attached to the place to be repaired next, thereby repeating the work of generating dust on the entire structure where the steel frame 12 is exposed. be able to. As a result, it is possible to perform base preparation, roughening and metal spraying by open blasting even when working outdoors at high places like a steel tower, and highly durable repairs can be performed. Therefore, the repair interval can be lengthened and the period until replacement of the member can be greatly extended, and the cost required for maintenance can be greatly reduced. In addition, it is possible to paint with a spray instead of a brush, and the convenience can be dramatically improved.

  Furthermore, according to the configuration of the present embodiment, since the joints of the divided sheets 152a to 152f are joined by the surface fasteners 154a to 154l, at any location along the longitudinal direction of the booth 100 (the axial direction of the steel frame 12). Any range can be opened and closed. Therefore, even if the blasting work position moves slightly in the vertical direction, the positions of the inspection window 160 and the work port 170 can be easily changed simply by changing the opening position of the surface fastener that joins the plurality of divided sheets. It is also possible to change the opening position according to the position of the auxiliary material 14. As a result, the blasting operation can be continued without requiring the booth rearrangement operation, and the labor can be saved.

  In the above embodiment, since the steel frame 12 is a main column member, the upper end surface member 110 and the lower end surface member 130 are arranged vertically, but the upper end surface member 110 and the lower end surface member 130 are naturally beams (lateral direction). ) Or auxiliary material 14 (oblique direction). When attached to the beam, the upper end surface member 110 and the lower end surface member 130 are arranged side by side, but in this case as well, the sheet 150 is stretched in exactly the same manner, and a space that can prevent dust scattering is constructed very easily. be able to.

  FIG. 9 is a diagram for explaining a surface treatment method using the booth 100. Examples of the surface treatment using the booth 100 include open blasting, thermal spraying, and spray coating. In FIG. 9, a scaffold 200 is constructed on the beam 16 of the steel tower 10, and the booth 100 is attached to the steel frame 12 as described above. A vacuum dust collector (not shown) is attached to the opening 118 (see FIG. 2) of the upper end surface member 110, and a dust collection bag (not shown) is installed in the openings 138a to 138c (see FIG. 3) of the lower end surface member 130. ) Is attached.

  The scaffold 200 is provided with a blast machine 212, a wire feeder 220 for arc spraying, and a spraying power source 222. An open blasting or spraying compressor (not shown) is installed on the ground, and is connected to a blasting machine 212 or a spraying power source 222 by a hose (not shown). A generator for thermal spraying (not shown) is also installed on the ground, and is connected to the thermal spraying power source 222 by an electric cable (not shown). Then, an blast nozzle 214 (see FIG. 7) of an open blast is inserted into the booth 100 from the work port 170 to perform a blasting process, and then a gun torch 224 of arc spraying is inserted to perform metal spraying.

  Keren, roughening and metal spraying by these open blasts all generate a large amount of dust. However, the dust can be prevented from being scattered by performing the treatment in the booth 100 described above. Therefore, it is possible to carry out treatment even at an outdoor high place work like the steel tower 10, and repair with high durability can be performed.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used as a booth for surface treatment used when blasting, surface preparation, roughening, thermal spraying, sealing treatment, and painting on the surface of a steel frame.

DESCRIPTION OF SYMBOLS 10 ... Steel tower, 12 ... Steel frame, 14 ... Auxiliary material, 14a ... Horizontal part, 16 ... Beam, 100 ... Booth, 110 ... Upper end surface member, 112 ... End surface, 114 ... First member, 114a ... Top surface, 114b, 114c ... Side surface 116 ... Second member 116a ... Top surface 116b / 116c Side surface 118 ... Opening portion 120a / 120b Dharma hole 121a / 121b Insertion hole 122a / 122b First slit hole 124a / 124b ... second slit hole, 126a, 126b ... bolt, 128 ... clip, 130 ... lower end surface member, 132 ... end surface, 134 ... first member, 134a ... bottom surface, 134b / 134c ... side surface, 136 ... second member, 136a ... Bottom, 136b, 136c ... Side, 138a, 138b ... Opening, 140a, 140b ... Dharma hole, 141a, 141b ... Insertion hole 142a, 142b ... 1st slit hole, 144a, 144b ... 2nd slit hole, 146a, 146b ... bolt, 148 ... clip, 150 ... sheet, 152a-152f ... split sheet, 153a ... notch, 154a-154l ... surface fastener , 160 ... Peep window, 162 ... Plate material, 164 ... Surface fastener, 170 ... Work port, 172 ... Tube, 174 ... Main cylinder, 176 ... Sub cylinder, 178 ... Surface fastener, 180 ... Sealing material, 200 ... Scaffolding, 212 ... Blasting machine, 214 ... Blast nozzle, 216 ... Blast hose, 220 ... Wire feeder, 222 ... Spraying power source, 224 ... Gun torch, 230 ... Hand

Claims (7)

A plurality of end surface members attached to the steel frame to form an end surface of the work space;
A sheet that is stretched over the plurality of end surface members to form a work space around the steel frame;
A clip that is disposed on the outer periphery of the end face member and fixes the sheet;
With
A booth for surface treatment of a steel frame, wherein the sheet comprises a plurality of divided sheets divided in a direction in which the steel frame is wound, and is joined to each other by a surface fastener attached to an end side of the divided sheet.   2. The booth for surface treatment of steel frames according to claim 1, wherein the joining portions of the divided sheets are joined so that both ends of the divided sheets on both sides protrude outward. It has a viewing window with hook-and-loop fasteners attached to the end face of the transparent plate.
The said inspection window is inserted in the joint of the said division | segmentation sheet | seat, The surface fastener of this observation window and the surface fastener of the said division | segmentation sheet | seat are joined. Booth for surface treatment of steel frame as described in 1. Provided with a work opening with hook and loop fasteners on the outer peripheral surface of the cylinder,
The said working port is inserted in the joint of the said division sheet, The surface fastener of this working port and the surface fastener of the said division sheet are joined, The any one of Claim 1 to 3 characterized by the above-mentioned. Booth for steel surface treatment.   5. The steel surface treatment according to claim 4, wherein the work opening includes a main cylinder for inserting a hand and a sub cylinder for branching from the main cylinder to insert a work tool. Booth. The clip is provided on a side surface of the end surface member,
2. The surface treatment of a steel member according to claim 1, comprising a slider that can move obliquely so as to approach the side surface of the end surface member, and sandwiching the divided sheet between the slider and the side surface of the end surface member. booth. The end face member is divided into a plurality of parts, and is configured to sandwich and fix a steel frame by combining the plurality of parts,
The steel surface treatment booth according to claim 1, wherein one of the parts to be combined has a fastening bolt, and the other part has a dharma hole through which the head of the bolt is inserted.

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