JP2006112078A - Mounting fitting for welding and securing thermoplastic resin plate or thermoplastic resin sheet to structure by high-frequency induction heating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problems: when a metal plate and a resin layer containing a thermoplastic resin are bonded together by an adhesive or the like, the chemical bonding slightly lacks reliability; and a structure on which a mounting fitting is mounted has unevenness, the mounting fitting cannot be flush with a mounting surface of the structure, and therefore mounting of a resin plate suffers from inconvenience. <P>SOLUTION: There is provided a new mounting fitting which is formed of a resin layer containing a thermoplastic resin and a metal plate having pores formed therein which are combined with each other without depending on chemical bonding by an adhesive or the like. According to the structure of the mounting fitting, a distance between a recessed lower surface for insertion of a concrete anchor bolt or a concrete anchor pin and a surface subjected to high-frequency induction heating and welding is set larger than a distance between a peripheral flange lower surface of the mounting fitting and the surface subjected to high-frequency induction heating and welding. Further the fitting has a spring-like material or a rubber-like material on a bottom surface thereof, and therefore the mounting surface and the mounting fitting are arranged at a predetermined location on the same plane. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a thermoplastic resin-based plate material or thermoplastic resin-based material in which at least one surface of a thermoplastic resin is used on the wall surface of a structure in which a mirror surface state is not ensured in civil engineering, waterproofing / water-impervious construction and repair / reinforcement construction in construction work The present invention relates to a mounting bracket for mounting a sheet by a high frequency induction heating method.

  The surface state of a structure constructed of concrete is generally uneven even if it is said that the finish is smooth. In order to attach a hard resin board to the surface, the board is perforated. The fixing member is fixed to the structure with a metal fitting such as bolts through the hole, or the fitting member is disposed on the periphery of the plate member, and the fitting member is installed on the structure with the metal fitting such as bolts. A method of fixing while adjusting the gap interval between structures is common.

  In addition, for waterproofing / waterproofing and repairing / reinforcing of roofs of structures, etc., a resin layer containing a thermoplastic resin is used to attach a thermoplastic resin plate or thermoplastic resin sheet to the construction target surface. A technique of applying a high-frequency induction heating method using a mounting bracket that combines a metal plate and a metal plate is well known as seen in the following patent documents.

Japanese Patent No. 2971149 Japanese Patent Publication No.58-36705 Japanese Patent Laid-Open No. 10-77722 Japanese Patent Laid-Open No. 2003-313995

  Many of these types of mounting brackets are coated with hot melt resin or adhesive on the surface of a metal plate and fixed using a high frequency induction heating method, hot air welding method, hot metal welding method, or adhesive, or adhesive tape The metal plate and the thermoplastic resin plate material or thermoplastic resin sheet are welded and fixed.

  However, in the fixing by the drilling method described in [0002], the hole is drilled in the plate, the head of the bolts to be attached pops out, the smoothness of the plate material surface is obstructed, and there is a chronic risk of occurrence of a blocking problem. In the case of using a fitting member, if the required fixing strength of the plate material is high, a large number of small-area plate materials must be attached, workability is remarkably deteriorated, and economically Significant costs are required.

  In addition, even when trying to fix the resin-based plate material using the high-frequency induction heating method described in [0003], the welding surface of the mounting bracket installed on the surface of the concrete structure where it is impossible to eliminate the uneven state, Since a plurality of mounting brackets are not arranged on the same plane due to the influence of unevenness, reliable welding work is impossible.

  Furthermore, in the fixing method described in [0003] [0005], since the bond between the metal plate and the hot melt resin or the adhesive is a chemical bond, the water vapor molecule and the oxygen molecule are contained in the coated hot melt resin or the adhesive layer. Isotropic gas component diffuses and penetrates to reach the interface between the metal plate and the hot melt resin or adhesive, or at the same time undergoes a thermal history, the metal plate is oxidized or deteriorated, There is a risk that the thermoplastic resin sheet will peel off, and it is not reliable.

  In order to solve such problems, Patent Document 4 discloses that a plurality of through holes are formed in a metal base material, and the through holes are filled with a thermoplastic resin, and the outer surface of the base material is thermoplastic. There has been proposed a mounting bracket which is covered with a resin coating layer and is connected by a synthetic resin connection portion in which the through-holes are filled with the coating layers on the front surface side and the back surface side.

  According to this proposal, a gas component such as water vapor molecules and oxygen molecules diffuses and penetrates into the hot melt resin or adhesive layer and reaches the metal surface, which is caused by oxidation and deterioration of the metal surface. The problem of “peeling of the resin-based plate material and the thermoplastic resin-based sheet” is solved.

  In the joining work by the high frequency induction heating method described in Patent Documents 2, 3, and 4, the metal plate of the mounting bracket continues to generate heat and rise in temperature in a short time, and the thermoplastic resin in contact with the metal plate is the metal plate contact interface. After the temperature rises, the welding surface of the thermoplastic resin sheet that protects the inside of the thermoplastic resin layer and contacts the welding surface of the mounting bracket rises in temperature and reaches the temperature at which welding is possible, and then melts first. The thermoplastic resin on the welding surface of the mounting bracket is integrally welded and fixed. However, in mounting brackets that are laminated on a metal plate with a synthetic resin with a large specific heat and extremely low thermal conductivity, the thickness of the thermoplastic resin coating to be welded to the thermoplastic resin sheet should be as thin as possible. If the temperature rise time at the welding interface of the resin-based sheet, which is a product, cannot be shortened as much as possible, the thermoplastic resin in contact with the metal plate that has previously melted may be exposed to excessive heating and the resin may be altered or deteriorated. The sex becomes extremely large.

  However, in the case where the thickness of the thermoplastic resin that covers the metal plate of the mounting bracket described in Patent Document 4 is 1-2 mm, when the joining operation by the high frequency induction heating method is performed, the metal plate is covered. The interface of the thermoplastic resin is burnt by the heat generated by the eddy current induced in the metal plate by the high-frequency current, frequently undergoes defects that deteriorate or deteriorate, and it is very difficult to perform a stable welding operation.

  Further, in the mounting bracket described in Patent Document 4, the tensile force that the waterproof sheet described in Patent Document 4 receives from the outside is a plurality of penetrations formed in a metal base material disposed on the back surface of the mounting bracket. Since it is received by the section of the thermoplastic resin immediately above the periphery of the hole, it depends on the specific strength and thickness of the thermoplastic resin used on the back surface and the area occupied by the metal plate of the hole.

  However, the mounting brackets so far have little consideration for unevenness of the installed structure surface. Since the surface of the actual structure or the existing structure is not smooth and uneven, the mounting brackets installed on the structure are not the same surface at a fixed distance from the structure, especially hard resin-based plate material When fixing the bracket with the mounting bracket, the welding surface of the mounting bracket does not come into full contact with the resin-based plate material, or there are gaps between a large number of brackets installed on the structure surface and the resin-based plate material. There is.

  In addition, the tensile force applied to the attached resin-based plate material or resin-based sheet is applied to the plastic resin layer disposed on the surface opposite to the welding surface of the mounting bracket through the resin filled in the hole drilled in the mounting bracket. Although it is transmitted, the holding force is determined by the strength characteristic inherent to the resin of the plastic resin layer, the resin thickness, and the total area of the holes in the welding surface of the mounting bracket. For this reason, unless the resin thickness is increased, a high gripping force cannot be expected.

  Further, when the thickness of the object to be welded is large, if the thickness of the thermoplastic resin layer disposed on the welding surface of the mounting bracket is large, it takes a long time until the welding surface of the object to be welded reaches a temperature at which welding is possible. Therefore, the thermoplastic resin that is in contact with the metal plate of the mounting bracket receives excessive heat, causing deterioration and deterioration such as easy burning.

  The present invention intends to solve such problems as described below.

  The present invention provides the following means for solving the above problems.

  Basically, in order to weld and fix a thermoplastic resin sheet or thermoplastic resin sheet using a thermoplastic resin on at least one surface to a structure by a high frequency induction heating method, the same resin as the above thermoplastic resin The resin layer containing a plurality of small holes is disposed on one or both sides of a metal plate, and the same resin as the resin used for the resin layer is filled in the small holes of the metal plate. A mounting bracket in which the thermoplastic resin filled in the hole is integrated, and the distance between the lower surface of the concrete anchor bolt or the concave portion for the concrete anchor pin formed on the mounting bracket and the high frequency induction heating welding surface is The structure is made of a thermoplastic resin sheet or a thermoplastic resin sheet having a high circumference, which is larger than the distance between the lower surface of the peripheral flange of the mounting bracket and the high frequency induction heating welding surface. Welded induction heating method, to provide a mounting bracket for fixing.

  Furthermore, the resin layer thickness arrange | positioned at the surface which touches the thermoplastic resin board | plate material or thermoplastic resin sheet | seat which used the thermoplastic resin for at least one surface of the metal plate of an attachment metal fitting shall be 0.05 mm or less to 0.5 mm or less. It is preferable.

  The mounting bracket preferably has a fiber layer laminated on a resin layer containing a thermoplastic resin disposed on one or both surfaces of a metal plate having a plurality of small holes.

  The fiber used for the fiber layer may be any of a woven fabric, a knitted fabric, a laminated fabric, a non-working fabric, and a fiber chip, and a mesh-shaped woven fabric or a laminated fabric is particularly preferable.

  The position of the fiber layer arranged in the resin layer containing the thermoplastic resin may be any position in the resin layer, but a position closer to the metal plate is preferable.

  In the mounting bracket, a spring-like material or a rubber-like material is preferably disposed on the lower surface of the concrete anchor bolt or the concrete anchor pin recess formed in the mounting bracket.

  In claim 1, claim 2 and claim 3, the mounting bracket is made of a metal plate and a resin layer containing a thermoplastic resin disposed on one or both surfaces of the metal plate. The small hole is filled with a resin layer and integrated, and the distance between the bottom surface of the concrete anchor bolt or the concave portion for the concrete anchor pin formed on the mounting bracket and the high frequency induction heating welding surface is the peripheral portion of the mounting bracket. Since it is larger than the distance between the flange lower surface and the high frequency induction heating welding surface, the following effects are exhibited.

  A plurality of resin layers containing the same resin as the thermoplastic resin installed in a structure on the thermoplastic resin surface of a thermoplastic resin plate or thermoplastic resin sheet using a thermoplastic resin on at least one surface The same resin as the resin used for the resin layer is filled in the small holes of the metal plate, and the resin layer and the small holes are filled with heat. The mounting bracket integrated with the plastic resin has a distance between the lower surface of the concave portion for the concrete anchor bolt or the concrete anchor pin formed on the mounting bracket and the high frequency induction heating welding surface, and the lower surface of the peripheral flange of the mounting bracket. When the mounting bracket is installed on the structure, there is a gap between the bottom surface of the flange and the structure. Even if the surface of the structure is not parallel to the mounting bracket when the mounting bracket is installed, the thermoplastic resin plate or the thermoplastic resin sheet on the mounting bracket Is pressed, the mounting bracket moves around the bottom surface of the concave portion for the concrete anchor bolt or the concrete anchor pin formed on the mounting bracket, and the welding surface of the bracket is made of the thermoplastic resin plate or the thermoplastic resin sheet. It can be completely adhered to the entire surface to be welded.

  Since the spring-like material or the rubber-like material is arranged on the lower surface of the concrete anchor bolt or the concrete anchor pin recess formed on the mounting bracket, the following effects are further obtained.

  If the welded surfaces of a plurality of mounting brackets installed on the structure are not aligned on the same surface due to unevenness of the structure, a spring is further applied to the bottom surface of the concave portion for the concrete anchor bolt or concrete anchor pin formed on the mounting bracket. By arranging the object or rubber-like object, the welding plate of the mounting bracket is aligned on the same plane by pressing any of the resin-based plate material or the resin-based sheet on the mounting bracket. When the welding surfaces of all the mounting brackets are subjected to high-frequency induction heating, heat generated by eddy currents generated in the metal plates of the brackets, the welding surfaces of the brackets, and the thermoplastic resin-based plate material or thermoplastic resin The welding surface of the system sheet is welded. By carrying out this welding operation on all the mounting brackets installed, the thermoplastic resin plate or thermoplastic resin sheet can be integrated with all the mounting brackets.

  However, in order to control the deterioration and deterioration of the resin layer disposed on the welding surface of the mounting bracket, such as scorching caused by excessive heat applied to the contact surface with the metal plate of the mounting bracket, it is described in claim 3. By setting the resin layer disposed on the mounting bracket welding surface to 0.05 mm to 0.5 mm or less, the heat generated by the eddy current on the metal plate of the mounting bracket is welded to the resin plate or sheet. It can be transmitted to the resin on the surface in a short time and the temperature can be raised to a temperature that can be welded in a short time. Therefore, controllable welding work can be performed.

  In Claim 4, since the fiber layer was laminated | stacked on the resin layer containing a thermoplastic resin, it has the following effect.

  In the present invention, the metal plate and the resin layer containing the thermoplastic resin are not actively bonded.

  In order to avoid this, there is a risk that the attached mounting bracket is subject to the deterioration and deterioration described in [0008] over time, and the initial performance and the performance after long-term use may change. If it is bonded, it must be received only by the metal part where the tensile force is applied to the metal plate from the outside, but since it is not bonded, it can be applied not only to the part where the tensile force is applied but also to a wide range of resin layers. Since the resin layer can be dispersed and the resin layer is reinforced with the fiber layer, the force can be further dispersed over a wide range, and the force received per unit area can be reduced.

  Also, if the diameter of the hole in the metal plate of the mounting bracket is increased, the peripheral edge of the through-hole connected via the metal plate when subjected to a tensile force by the attached thermoplastic resin-based plate material or thermoplastic resin-based sheet material The resin layer requires a large thickness because it is received by the resin section directly above, but if the resin layer connected is reinforced by the fiber layer, the tensile force is widely dispersed through the fiber layer. It is possible to maintain the proper strength.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing a flat circular mounting bracket for welding and fixing a thermoplastic resin sheet or a thermoplastic resin sheet to a structure according to the present invention by high frequency induction heating, and FIG. It is AA sectional drawing.

  2 includes a metal plate 1 in which a plurality of small holes 1a are perforated through the front and back and a resin layer 2a containing a thermoplastic resin. The metal plate 1 and the resin layer 2a are heated. The entire space of the small hole 1a perforated in the metal plate 1 is filled with a part 2c of the resin layer 2a by a pressure press, and the resin is swelled above the small hole 1a. The

  The mounting bracket 10 has a top surface as a welding surface 3 on which a resin plate or a resin sheet is welded, several concrete anchor bolts or concrete anchor pin recesses 4 in the central longitudinal direction, and flanges 6 on both sides in the longitudinal direction. Reference numeral 5 denotes a concrete anchor bolt or a concrete anchor pin hole. The distance between the lower surface 7 of the concrete anchor bolt or concrete anchor pin recess 4 and the welding surface 3 is larger than the distance between the flange lower surface 6a.

  FIG. 4 shows another flat circular mounting bracket for welding and fixing the thermoplastic resin sheet or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating. It is sectional drawing.

  In FIG. 4, a mounting bracket 10 includes a metal plate 1 in which a plurality of small holes are perforated through the front and back, a resin layer 2a containing a thermoplastic resin, and a resin layer 2b. The metal plate 1 and the resin layer 2a And the resin layer 2b are made of the same resin, and the resin layer 2a and the resin layer 2b are all formed in the small holes 1a perforated in the metal plate 1 by the primary hot press and the secondary hot press, respectively. The space is filled with a part 2c of the resin layer 2a and molded integrally. The layer thickness of the resin layer 2b is set to 0.05 mm to 0.5 mm or less.

  The mounting bracket 10 has a top surface as a welding surface 3 on which a resin plate or a resin sheet is welded, several concrete anchor bolts or concrete anchor pin recesses 4 in the central longitudinal direction, and flanges 6 on both sides in the longitudinal direction. Reference numeral 5 denotes a concrete anchor bolt or a concrete anchor pin hole. The distance between the lower surface 7 of the concrete anchor bolt or concrete anchor pin recess 4 and the welding surface 3 is larger than the distance between the flange lower surface 6a.

  FIG. 5 shows another planar circular shape having the same top appearance as in FIG. 1 for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating. It is AA sectional drawing of FIG. 1 of an attachment metal fitting.

  5 includes a metal plate 1 in which a plurality of small holes 1a are perforated through the front and back and a resin layer 2a containing a thermoplastic resin and laminated with a fiber layer 8a. The resin layer 2a is filled with a part 2c of the resin layer 2a in the entire space of the small hole 1a drilled in the metal plate 1 by a heat and pressure press, and the fiber layer 8a is opposite to the welding surface of the mounting bracket. It is laminated | stacked as a reinforcement layer in the layer of the resin layer 2a arrange | positioned on the surface, and is integrally formed so that it may be in the state which resin swells further on the upper part of the small hole 1a.

  FIG. 6 shows another planar circle having the same top appearance as FIG. 3 for welding and fixing the thermoplastic resin sheet or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating. It is BB sectional drawing of this attachment bracket.

  In FIG. 6, the mounting bracket 10 includes a metal plate 1 in which a plurality of small holes are perforated through the front and back, a resin layer 2a containing a thermoplastic resin and having a fiber layer 8a laminated thereon, and a resin having no fiber layer. The resin layer 2a and the resin layer 2b are respectively formed in the entire space of the small holes 1a drilled in the metal plate 1 by the primary hot press and the secondary press, respectively. Part 2c is filled and formed integrally, and the fiber layer 8a is laminated and integrated as a reinforcing layer in the resin layer 2a disposed on the surface opposite to the welding surface of the mounting bracket.

  The mounting bracket 10 has an upper surface as a welding surface 3 for welding a thermoplastic resin plate material or a thermoplastic resin sheet, several concrete anchor bolts or concrete anchor pin recesses 4 in the central longitudinal direction, and flanges on both longitudinal sides. 6. Reference numeral 5 denotes a concrete anchor bolt or a concrete anchor pin hole. The distance between the lower surface 7 of the concrete anchor bolt or concrete anchor pin recess 4 and the welding surface 3 is larger than the distance between the flange lower surface 6a.

  FIG. 7 shows another planar circular shape having the same top appearance as FIG. 3 for welding and fixing a thermoplastic resin sheet or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating. It is BB sectional drawing of an attachment metal fitting.

  In FIG. 7, the mounting bracket 10 includes a metal plate 1 having a plurality of small holes penetrating through the front and back, a resin layer 2a containing a thermoplastic resin and a fiber layer 8a, and a fiber layer 8b. The resin layer 2b and the resin layer 2b are formed in the entire space of the small holes 1a drilled in the metal plate 1 by the primary hot press and the secondary hot press, respectively. A portion 2c of the layer 2a is filled and molded integrally, the fiber layer 8a is in the layer of the resin layer 2a disposed on the surface opposite to the welding surface of the mounting bracket, and the fiber layer 8b is on the welding surface of the mounting bracket. It is laminated and integrated as a reinforcing layer in the resin layer 2b to be disposed. The layer thickness of the resin layer 2b is 0.5 mm.

  The mounting bracket 10 has an upper surface as a welding surface 3 for welding a thermoplastic resin plate material or a thermoplastic resin sheet, several concrete anchor bolts or concrete anchor pin recesses 4 in the central longitudinal direction, and flanges on both longitudinal sides. 6. Reference numeral 5 denotes a concrete anchor bolt or a concrete anchor pin hole. The distance between the lower surface 7 of the concrete anchor bolt or concrete anchor pin recess 4 and the welding surface 3 is larger than the distance between the flange lower surface 6a.

  Next, still another embodiment will be described.

  FIG. 9 is a cross-sectional view taken along the line CC of FIG. 8 of another flat rectangular mounting bracket for welding and fixing a thermoplastic resin sheet or a thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating. FIG.

  In the CC cross-sectional view, the display of the metal plate, the resin layer, and the fiber layer is the same as in FIGS. 2, 4, 5, 6, and 7, and is omitted.

  The mounting bracket 11 has a rectangular shape, and has an upper surface as a welding surface 3 for welding the thermoplastic resin plate material or thermoplastic resin sheet, and several concrete anchor bolts or concrete anchor pin recesses in the central longitudinal direction. 4. Both sides in the longitudinal direction are flanges 6. Reference numeral 5 denotes a concrete anchor bolt or a concrete anchor pin hole. The distance between the lower surface 7 of the concrete anchor bolt or concrete anchor pin recess 4 and the welding surface 3 is larger than the distance between the flange lower surface 6a.

  FIG. 10 shows another flat circular or flat rectangular mounting bracket for welding and fixing a thermoplastic resin sheet or thermoplastic resin sheet to a structure according to the present invention by high frequency induction heating. It is sectional drawing of FIG. 3 or FIG. In the figure, the display of the metal plate, the resin layer, and the fiber layer is omitted.

  In the mounting bracket 10 or 11, a spring-like object 14 is disposed and fixed on a concrete anchor bolt or a concrete anchor pin concave lower surface formed on the mounting bracket 10 or 11. By arranging the spring-like object 14, the surface of the structure and the mounting bracket 10 or 11 can be easily arranged on the same plane using elasticity even if the mounting portion of the mounting bracket 10 or 11 is uneven. Can be positioned above.

  FIG. 11 shows another flat circular or flat rectangular mounting bracket for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to a structure according to the present invention by a high frequency induction heating method. It is sectional drawing of FIG. 3 or FIG. In the figure, the display of the metal plate, the resin layer, and the fiber layer is omitted.

  In the mounting bracket 10 or 11, a rubber-like object 15 is disposed and fixed on a concrete anchor bolt or a concrete anchor pin concave lower surface formed on the mounting bracket 10 or 11. By arranging the rubber-like object 15, the surface of the structure and the mounting bracket 10 or 11 can be easily arranged on the same plane using elasticity even if the mounting portion of the mounting bracket 10 or 11 is uneven. Can be positioned above.

  The spring-like material 14 and the rubber-like material 15 shown in Examples 7 and 8 can be added to any of the metal fittings of Examples 1, 2, 3, 4, 5, and 6.

  In this way, the mounting bracket for welding and fixing the thermoplastic resin plate or the thermoplastic resin sheet to the structure as a whole by the high frequency induction heating method is configured.

  The metal plate used in the present invention is not particularly limited as long as it has conductivity, and examples thereof include iron, stainless steel, aluminum, copper, and other alloys, and stainless steel SUS430 is particularly preferable.

  Examples of the thermoplastic resin used in the present invention include polyethylene resin, chlorinated polyethylene resin, polypropylene resin, polyester resin, vinyl chloride resin, nylon resin, fluororesin, silicone resin, ethylene-vinyl acetate polymer resin, ethylene-vinyl. Alcohol copolymer resin, polycarbonate resin, acrylic resin, urethane resin, vinyl chloride resin / ethylene-vinyl acetate-carbon monoxide triple copolymer resin mixture, ionomer resin or ethylene-propylene rubber, fluoro rubber, urethane rubber, etc. One or more materials or rubber materials.

  The fibers used in the present invention are, for example, aramid fibers, polyarylate fibers, polyvinyl alcohol fibers, polyester fibers and polyamide fibers, synthetic fibers such as glass fibers, mineral fibers such as glass fibers, and metal fibers such as stainless fibers.

  The mounting bracket for welding and fixing a thermoplastic resin plate or a thermoplastic resin sheet to the structure according to the present invention by a high frequency induction heating method is formed as described above, and is used as follows.

  FIG. 12 is a cross-sectional view showing a state in which the attachment fitting is attached to the wall surface of the concrete structure. In the figure, the display of each layer of a metal plate, a resin layer, and a fiber layer is omitted.

  First, the mounting bracket 10 is attached to the surface of the concrete structure 12 so as to be parallel to the surface of the structure 12 using concrete anchor bolts or concrete anchor pins 13. After attaching the mounting bracket 10 to the surface of the structure 12, high-frequency induction heating is performed by placing the thermoplastic resin plate 16 or the thermoplastic resin sheet along the welding surface of the mounting bracket 10.

  As the thermoplastic resin-based plate material or the thermoplastic resin-based sheet, a thermosetting resin having a thermoplastic resin layer provided on one side, a thermoplastic resin on both sides, or a material in which the whole is a thermoplastic resin is appropriately selected and used.

  When the mounting bracket 10 or 11 is mounted on the surface of the structure 12 and the thermoplastic resin plate 16 is attached to the welding surface of the mounting bracket 10 or 11, a magnetic field line is generated from the induction current coil when an electric current is passed. The lines of magnetic force pass through the thermoplastic resin plate 16 or the thermoplastic resin sheet and reach the mounting bracket 10 or 11. An eddy current is generated inside the mounting bracket 10 or 11 to generate heat. Sequentially, heat is generated toward the thermoplastic resin plate 16 or thermoplastic resin sheet, and the temperature of the thermoplastic resin plate or thermoplastic resin sheet rises with a delay. After the resin layer of the mounting bracket 10 or 11 and the thermoplastic resin plate 16 are melted and integrated, the energization is stopped and the cooling is performed.

FIG. 3 is a plan view of a metal fitting having a flat circular shape for welding and fixing a thermoplastic resin sheet or a thermoplastic resin sheet to a structure according to the present invention by high frequency induction heating, and having no resin layer on the metal upper surface. is there. It is AA sectional drawing of FIG. This is another flat circular mounting bracket for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating, and includes a bracket having a resin layer on the upper surface of the bracket. It is a top view. It is BB sectional drawing of FIG. Another flat circular mounting bracket for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to the structure according to the present invention by a high frequency induction heating method. It is sectional drawing of the metal fitting which has the resin layer on which the fiber layer was laminated | stacked. Another flat circular mounting bracket for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating, and having a resin layer on the upper surface of the bracket, It is sectional drawing of the metal fitting which has the resin layer by which the fiber layer was laminated | stacked on. This is another flat circular mounting bracket for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating, and a fiber layer is laminated on the upper and lower surfaces of the bracket. It is sectional drawing of the metal fitting which has a resin layer. 1 is an external view of a flat rectangular mounting bracket for welding and fixing a thermoplastic resin plate or a thermoplastic resin sheet to a structure according to the present invention by a high frequency induction heating method. It is CC sectional drawing of FIG. FIG. 1 and FIG. 3 show another mounting bracket in which a spring-like object is attached to the bottom surface for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating. Or it is sectional drawing of FIG. FIG. 1 and FIG. 3 show another mounting bracket in which a rubber-like material is attached to the bottom surface for welding and fixing a thermoplastic resin plate or a thermoplastic resin sheet to the structure according to the present invention by high frequency induction heating. Or it is sectional drawing of FIG. It is sectional drawing which shows the state which attached the attachment metal fitting to the wall surface of a concrete structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal plate 1a Small hole 2a Resin layer containing thermoplastic resin 2b Resin layer containing thermoplastic resin 2c A part of resin layer 3 Welding surface 4 Concrete anchor bolt or concrete anchor pin recessed part 5 Concrete anchor bolt or concrete anchor Pin hole 6 Flange 6a Flange bottom surface 7 Concrete anchor bolt or concrete anchor pin concave bottom surface 8a Fiber layer 8b Fiber layer 10 Planar circular mounting bracket 11 Planar rectangular mounting bracket 12 Concrete structure 13 Concrete anchor bolt or concrete anchor pin 14 Spring shape Material 15 Rubber-like material 16 Thermoplastic resin board

Claims (4)

  In order to weld and fix a thermoplastic resin plate or a thermoplastic resin sheet using a thermoplastic resin on at least one surface to a structure by a high frequency induction heating method, a resin layer containing the same resin as the thermoplastic resin is provided. Resin that is disposed on one or both sides of a metal plate having a plurality of small holes and is filled in the small holes of the metal plate with the same resin as that used for the resin layer, and is filled in the resin layer and the small holes The distance between the bottom surface of the concave portion for the concrete anchor bolt or the concrete anchor pin formed on the mounting bracket and the high frequency induction heating welding surface is equal to the bottom surface of the flange of the mounting bracket and the high frequency. It is larger than the distance from the induction heating welding surface, and the difference between the two is larger than the thickness of the pan at the height of the concrete anchor bolt or concrete anchor pin head. Welded structure characterized that no thermoplastic resin sheet or a thermoplastic resin sheet at a high frequency induction heating method, mounting hardware for fixing.   The thickness of the resin layer disposed on the thermoplastic resin-based plate material using the thermoplastic resin on at least one surface or the metal plate in contact with the thermoplastic resin-based sheet is 0.05 mm to 0.5 mm or less, A mounting bracket for welding and fixing a thermoplastic resin plate or a thermoplastic resin sheet to the structure according to Item 1 by high frequency induction heating.   The structure according to claim 1 or 2, wherein a fiber layer is laminated on a resin layer containing a thermoplastic resin disposed on one side or both sides of a metal plate having a plurality of small holes. Mounting bracket for welding and fixing resin plate materials or thermoplastic resin sheets by high frequency induction heating.   4. The structure according to claim 1, wherein a spring-like material or a rubber-like material is disposed on the bottom surface of the concrete anchor bolt or the concrete anchor pin recess formed in the mounting bracket. A mounting bracket for welding and fixing a thermoplastic resin plate or thermoplastic resin sheet to a high frequency induction heating method.

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