WO2008004285A1

WO2008004285A1 - Method of joining metal sheets and sander

Info

Publication number: WO2008004285A1
Application number: PCT/JP2006/313375
Authority: WO
Inventors: Takao Motohashi
Original assignee: Conquest Co., Ltd
Priority date: 2006-07-05
Filing date: 2006-07-05
Publication date: 2008-01-10
Also published as: CN101233329A; AU2006345829B2; HK1122089A1; JP5155859B2; CN101233329B; AU2006345829A1; JPWO2008004285A1; NZ571701A

Abstract

[PROBLEMS] Provided are a method of joining metal sheets together, and a sander. The method is suitable for repairing a damaged part of a metal sheet of, for example, a vehicle body, and a damaged part of nonferrous metal of buildings and a machines or a damaged part of a nonferrous peripheral wall, is capable of two-dimensionally or three-dimensionally joining, in flush with each other, joined or repaired parts of sheet bodies having particularly complex curve surfaces, and precisely and beautifully finishing them, and is capable of reasonably and easily performing such joining operation. [MEANS FOR SOLVING THE PROBLEMS] Two plate bodies(5, 7) to be repaired and joined to each other are disposed so that their ends to be joined are separated from each other in the plate thickness direction or in the direction perpendicular to the plate thickness direction. In the method, joining pieces (6, 31) formed integrally with or separately from the metal sheet are disposed on one side of the ends to be joined. The ends to be joined are adhered to the joining pieces (6, 31). Before an adhesive agent (10) is cured, a pressing plate (12) is disposed on the other side surfaces of the ends to be joined. Attracting devices (15) each having magnetic force are installed on the surface of the pressing plate (12). The pressing plate (12) is fitted to the other side surfaces of the ends to be joined by the magnetic force of the attracting devices (15). The ends to be joined are attracted and displaced by the magnetic force, and as a result, the ends are disposed in flush with each other with reference to the pressing plate (12).

Description

Metal plate joining method and sander

Technical field

The present invention is suitable for repairing a damaged part of a metal plate such as a vehicle body or a damaged part of a non-ferrous metal or non-metallic peripheral wall of a building or a machine, for example, and has a particularly complicated curved surface. Joining or repairing parts of the body flatly or three-dimensionally and finishing them precisely and beautifully, and a method of joining metal plates and the like that makes this kind of joining work rational and easy About Sanda.

Background art

[0002] For example, when joining metal plates, generally, a method is adopted in which the metal plates are superposed or butted, or the joint plate is welded to the metal plates to be joined and welded, or rivets or screws are used.

However, in welding, the metal plate is thermally deformed or generates residual stress, and the rivet generates impact strain and residual stress around the rivet hole due to instantaneous point pressure, which may result in bonding accuracy and deformation after bonding. In addition, it is not stable and screwing makes the screwing work complicated, and in any case, there is a problem in that the appearance of welding marks, rivets, screws, etc. appears and the appearance is bad.

Therefore, in such a general joining method, for example, it is not possible to respond to repair of a damaged part of a vehicle body that requires a high level of surface leveling.

[0003] That is, as a repair form of the damaged part of the vehicle body, there is a case where the damaged part is excised and a repair member is joined to the excised part. In such repair, the general method described above is used for repair. When the repair member is joined, the surface of the repaired portion is distorted, and the surface leveling and appearance are impaired. Therefore, the joining method described above cannot be employed.

For this reason, the vehicle body part including the damaged part is usually replaced with a new part. However, such a repair method requires attachment / detachment of other parts adjacent to the vehicle body part, for example, a windshield bumper. As a result, it takes time, and the repair costs increase and become unreasonable.

[0004] Therefore, the applicant partially cuts out a predetermined range including a damaged part of the vehicle body, and joins the prepared repair member relatively easily using an adhesive without impairing the leveling of the surface. A method has been developed and has already been proposed.

[0005] That is, the metal plate joining method proposed by the applicant is that a pair of metal plates is chamfered at the end, and a screw hole into which a tapping screw can be screwed is formed in the vicinity thereof. The opening is formed in the shape of a bowl, while the joining end of the metal plate is placed facing each other, and an adhesive is applied to the back surface to bond the backing plate.

When the adhesive is substantially cured, the tapping screw is screwed into the screw hole, the adhesive is filled in the recess between the screw hole and the end of the metal plate, and the screw head is concealed. At the same time, the joint portion of the metal plate was leveled to form a single metal plate having no joint portion in appearance (see, for example, Patent Document 1).

[0006] As another form of the metal plate joining method, the applicant has chamfered the end of one metal plate into a taper shape, and has a screw hole into which a tapping screw can be screwed. Forming a stepped portion at the edge of the other metal plate, bending it to the back side to form a superposed portion, and using the superposed portion in place of the aforementioned backing plate, It arrange | positions to the edge part side back surface of this, and apply | coats an adhesive agent on the back surface of this metal plate, and carries out the adhesive arrangement | positioning. Then, when the adhesive is substantially cured, the tapping screw is screwed into the screw hole, and the screw hole and the recess between the chamfered portion and the edge of the metal plate are filled with the same quality adhesive. A method of concealing the head of the screw and leveling the joint portion of the metal plate so that it looks like a single metal plate without a joint portion is also proposed at the same time.

[0007] However, the joining method proposed by the applicant requires the formation of a tapping screw and a screw hole in the metal plate, and the number of parts increases and the processing of the screw hole increases, resulting in poor productivity. .

In addition, when joining thin steel plates, for example, for automobile bodies, a tapping screw with a length in which the screw head is buried in the screw hole is required, and the tapping screws are arranged at a pitch of about 50 mm. Without this, a good pressing state with respect to the bonding margin adhesive could not be obtained.

In order to satisfy these conditions, a custom tapping screw must be used. Also, during the series of joining operations, screw hole drilling operations, tapping screw screwing operations, and adhesive filling are performed. It requires work, etc., and the work is complicated and time-consuming. There was a problem.

[0008] Furthermore, in the above-described joining method, when one of the metal plate end portions is difficult to be tightened with a tapping screw and one of the joint portions is firmly tightened, the joint portion is connected to the other joint. It sinks more than the base part, and steps are formed at the right and left joint parts, making it difficult and powerful to join both metal plate ends together.

As a result, when there was a step at the left and right metal plate ends, the surface of the metal plate on the step side including the metal plate was put and leveled, but it took time and effort. There was a problem that the appearance of the joint was badly felt by the outside.

[0009] In order to solve such a problem, a predetermined portion including a damaged portion of a car body of an automobile is removed, an end portion of the sheet metal is formed in a taper shape, and a bent portion of the taper is formed in a round shape. In addition, a repair member having an area larger than that of the removed portion is prepared, and an end portion of the repair member is folded back using a dedicated repair tool, and an adhesive is applied to the back side of the end portion of the sheet metal. There is a sheet metal repair method in which the surface of the repair member, the sheet metal, and the putty is coated by putting the putty in the recess between the repair member and the end of the sheet metal (for example, see Patent Document 2). .

[0010] However, although this sheet metal repair method can prevent the appearance of repair traces by forming a rounded shape in the taper portion, since it does not consider the temperature expansion of the filler filled in the portion, for example, in summer There was a problem that the filler bulges and repair marks appear, impairing the appearance.

In the repair method described above, the sheet metal is simply joined and disposed at the folded portion via an adhesive, so that the uniformity of the sheet metal to be joined cannot be obtained due to variations in the size of the folded portion or the amount of adhesive. In addition, the quality of the joints was different, and it was impossible to expect a smooth joint and beautiful appearance. In particular, in the case where the joint portion is a complicated and three-dimensional curved surface, it has been desired that the joint portion be flush with the joint portion, and the improvement in the uniformity should be significantly reduced.

[0011] By the way, when repairing a damaged part of the vehicle body, the recess between the repair member and the end part of the vehicle body is filled with putty, and this putty is made flush with the surface of the vehicle body in preparation for painting. A sander is generally used as a so-called putty sharpening tool after grinding.

[0012] The sander includes a rough head and a finishing head, and each head has an endless grinding belt that is wound around a pulley and rotationally driven, and a pad unit disposed in the belt. The pad unit includes a bracket provided on the grinding belt so as to be able to advance and retract, an air cylinder that drives the bracket, a pad that is rotatably supported by the bracket, and a motor that positions the pad at a desired angle. Has two flat portions orthogonal to each other and a curved surface portion arranged at a corner between the flat portions, and a flat portion of the pad is selected as a ground surface or a convex curved surface. There is a belt sander that selects a curved surface portion of a pad for a curved surface having a concave grinding surface, and presses a grinding belt at the selected portion to grind the surface to be ground (see, for example, Patent Document 3).

However, in the belt sander, the curvature of the curved surface portion of the pad is limited to one type, and this is linearly moved by an air cylinder and the grinding belt is simply pressed, so that the surface to be polished is complicated. There is a problem that it is formed on a curved surface and its curvature changes variously, and it cannot cope with grinding of a curved surface portion of a vehicle body.

[0014] In order to solve such a problem, two pad bodies having flexible inertia material force are overlapped with each other, and these are connected so as to be relatively movable in the length direction to form a pad. There is a belt sander that holds a pad and presses it against a grinding belt to grind the surface to be ground (for example, see Patent Document 4).

[0015] However, since the belt sander is operated by holding the pad by hand, it takes a lot of labor and makes it difficult to work for a long time, and the pad body is flexible. On the other hand, in order to maintain the curvature, a delicate operation is required on the fingers, which increases the burden on the fingers and requires skill in the work.

[0016] Patent Document 1: Japanese Patent No. 3187782

Patent Document 2: WOOOZ32352

Patent Document 3: Japanese Patent Application Laid-Open No. 59-53155

Patent Document 4: Japanese Patent Laid-Open No. 2001-300840

Disclosure of the invention

Problems to be solved by the invention

[0017] The present invention solves such problems, and is suitable for repairing damaged parts of metal plates such as car bodies and non-ferrous metal or non-metallic peripheral walls of buildings, machines, etc. The joints that have curved surfaces are joined to each other in a flat or three-dimensional manner. It is an object of the present invention to provide a method and a sander for joining metal plates and the like that can finish this kind of precision and beauty and can perform this kind of joining work rationally and easily.

Means for solving the problem

[0018] In the method for joining metal plates and the like according to the present invention, the joining end portions of two metal plates to be joined to each other are arranged apart from each other in the plate thickness direction or in the direction perpendicular to the plate thickness, and on one side of the joining end portions. In a joining method for a metal plate or the like, in which a joining piece that is integral with or separate from the metal plate is disposed, and the joining end portion and the joining piece are bonded together, the other end of the joining end portion is cured before the adhesive is cured. A pressure plate is arranged over the surface, an adsorbing tool having a magnetic force is installed on the surface of the pressing plate, the pressing plate is brought into close contact with the other surface of the joining end portion through the magnetic force of the adsorbing tool, and The joint end portion is attracted and displaced via the magnetic force, and the two joint end portion side surfaces are flush with respect to the pressing plate, so that the joint portion of the metal plate is planarly or three-dimensionally formed. The joints are leveled and the joints are leveled to obtain a precise and beautiful appearance.

[0019] Further, the joining method of the metal plate or the like according to the present invention has a variety of surfaces from the flat surface to the complicated curved surface by making the two joint end side surfaces flush with each other in a plane or curved surface. It is possible to obtain the same joint surface.

Furthermore, in the method for joining metal plates and the like according to the present invention, the pressing plate is formed of a member having a small relative magnetic permeability so that magnetic force can be transmitted to the pressing plate to prevent the magnetic force from being attenuated. Make sure to use the same joint surface.

The method for joining a metal plate or the like according to the present invention is such that the pressing plate can be bent in the plate thickness direction, can be easily bent along the curved joining portion, and the curved joining surface can be made flush. The

Further, in the method for joining metal plates and the like according to the present invention, a plurality of pressing plates are arranged adjacent to each other on the other side surface of the joining end portion so as to promote the bending of the pressing plates. So that you can easily meet the same level of standards.

Furthermore, the bonding method of the metal plate or the like according to the present invention attaches a non-adhesive sheet to the back surface of the pressing plate, prevents the adhesive pushed out by the suctioned metal plate from adhering to the pressing plate, The board can be easily removed.

[0020] In the method for joining metal plates and the like according to the present invention, one or a plurality of suction tools are installed on the pressing plate. In this way, the pressing plate can be fixed efficiently and accurately.

In addition, the bonding method of the metal plate or the like of the present invention ensures that the bonding end portion is hardened after the surface of the bonding end portion side surface so as to secure the suction displacement of the bonding end portion, and the bonding end portion. Make sure that you are in a consistent state.

Furthermore, in the method for joining metal plates and the like according to the present invention, the pressing plate is removed after the adhesive is hardened after the surface of the joining end portion side surface can be easily filled between the metal plates. I am doing so.

In the method for joining metal plates and the like according to the present invention, after the pressing plate is removed, a filler is filled between the metal plates on the other side of the joined end portion so that the surface of the joined end side surface is kept flush. I am trying to get it.

In addition, the method for joining the metal plates and the like of the present invention is such that at least the corners on the surface side between the metal plates to be filled with the filler are formed in a micro-curved shape at least before the filling with the filler. The corner line is exposed to the outside so as to prevent a situation in which a joint mark is sensed.

Furthermore, in the method for joining metal plates and the like according to the present invention, the filler has a linear expansion coefficient as small as possible, and suppresses expansion and contraction of the filler, for example, due to thermal expansion of the filler in summer. This prevents bulging and prevents the sense of joining marks.

In the method for joining metal plates and the like according to the present invention, the adsorbing tool is configured by mounting a magnet block in a steel plate housing having a U-shaped cross section, and a specific configuration of the adsorbing tool is proposed. In the joining method of the metal plate or the like according to the present invention, the edge of the housing is arranged so as to protrude from the end face force of the magnet block, and the magnetic force is efficiently released from the edge, so that the suction tool can be stably fixed. And then.

Furthermore, in the method for joining metal plates and the like of the present invention, a grip portion is provided on the suction tool so that the suction tool can be handled easily.

In the method for joining metal plates and the like according to the present invention, a plurality of suction tools are connected by a handle so that the plurality of suction tools can be easily handled.

Further, in the method for joining metal plates and the like of the present invention, after the filler is cured, the surface of the filler can be easily ground by polishing with a sander. [0022] In the method for joining a metal plate or the like according to the present invention, the joining end portions of two plate bodies to be joined to each other are arranged apart from each other in the plate thickness direction or in the direction perpendicular to the plate thickness. A joining method for a plate body in which a joining piece that is integral with or separate from two plate bodies is disposed, the joining end portion and the joining piece are bonded together, and at least one of the plate bodies is screwed to the joining piece. Use a thin head tapping screw for the screw, grind the screw head after the adhesive is cured, and leave the screw at the joint end of the plate. In addition to realizing temporary fixing of the plate with a tapping screw, various plate bodies such as metal, non-ferrous metal, and non-metal can be reasonably and firmly joined using the joining strength of the tapping screw. Yes.

[0023] Further, in the method for joining a metal plate or the like according to the present invention, the head of the screw is ground smoothly, and the ground surface of the head and the surface of the joint end are flush with each other. We are trying to prepare for the painting of the surface.

Furthermore, in the method for joining metal plates and the like according to the present invention, the ground surface of the screw head and the surface of the joint end are flush with each other, and then the surfaces of the joint end are painted rationally. I try to paint.

[0024] The sander of the present invention is a sander including a drive unit and a grinding plate that operates in conjunction with the drive unit and can hold a grinding sheet. The sander is provided so as to be able to bend in the plate thickness direction. The grinding plate is easily curved along the curved surface of the curved surface to be ground, making it possible to grind the part.

In addition, the sander of the present invention makes the grinding plate slender in the grinding direction and enables the polishing plate to reciprocate linearly in the length direction, thereby reducing the size and weight of the grinding plate and improving the operation. As well as ensuring the performance, grinding in a narrow space is possible.

Furthermore, the sander of the present invention presses the tip of the grinding plate so that the grinding plate can be moved along the surface of the portion to be ground, and the grinding plate is moved along the curved surface of the curved surface to be ground. It is possible to operate and to perform the grinding.

The sander of the present invention is provided with a swinging frame on which the drive unit can be installed, a swinging lever is swingably connected to a position opposed to the swinging frame, and a holding plate is provided at an end of the swinging lever. It is connected so that it can rotate in the plate thickness direction, and the grinding plate is attached between the holding plates so that it can be bent in the plate thickness direction. The grinding plate is displaced according to the surface to be ground so that the surface to be ground can be precisely ground

[0025] Further, the sander of the present invention enables the grinding plate to be operated in the length direction and the width direction through the operation of the swing lever, and is adapted to various grinding directions and various grinding conditions, It is possible to obtain precise and diverse ground surfaces.

Furthermore, the sander of the present invention is provided with the drive unit so as to be able to vibrate, and through the vibration of the drive unit, the rocking frame and the rocking lever are provided so as to be able to be interlocked so that grinding utilizing vibration can be realized. is doing.

The sander of the present invention protrudes so that the drive unit can be gripped on the swing frame, thereby improving the operability of the sander so that it can be used easily.

Further, the sander of the present invention presses the drive unit so that the grinding sheet can be displaced along the surface of the part to be ground, so that various grinding surfaces can be easily ground.

The invention's effect

[0026] In the method for joining a metal plate or the like according to the present invention, before the adhesive is cured, a pressing plate is disposed over the other surface of the joining end portion, and the surface of the pressing plate has a magnetic force. A tool is installed, the pressing plate is brought into close contact with the other side surface of the joint end through the magnetic force of the adsorber, and the joint end is sucked and displaced through the magnetic force, thereby Since the end side surface is flush with the pressing plate as a reference, the joint portion of the metal plate is planarly or three-dimensionally joined, and the joint portion is leveled to provide a precise and beautiful appearance. There is an effect to be obtained. In addition, since the joining method of the metal plate or the like of the present invention makes the two joining end side surfaces flush with each other in a flat surface or a curved surface shape, various joining surfaces can be obtained from flat surface forces to complicated curved surfaces. You can get the same level.

Furthermore, in the method for joining the metal plate and the like of the present invention, the pressing plate is formed of a member having a small relative permeability, and the magnetic force of the adsorbing tool is transmitted to the pressing plate, so that the pressing plate can transmit the magnetic force. In addition to preventing the attenuation of the magnetic force, it is possible to realize a flush joint surface using the magnetic force.

[0027] The method for joining a metal plate or the like according to the present invention enables the pressing plate to bend in the thickness direction, so that it can be easily bent along the curved joined portion, and the curved joined surface can be made flush. Can it can.

Further, in the joining method of the metal plate or the like of the present invention, a plurality of pressing plates are arranged adjacent to each other on the surface on the other side of the joining end portion. There is an effect that can be easily met.

Furthermore, since the non-adhesive sheet is attached to the back surface of the pressing plate according to the method for bonding a metal plate or the like of the present invention, it is possible to prevent a situation where the adhesive pushed out by the bonded end portion that is displaced by suction adheres to the pressing plate. The pressing plate can be easily removed.

[0028] In the method for joining metal plates and the like according to the present invention, one or a plurality of suction tools are installed on the pressing plate, so that the pressing plate can be fixed efficiently and accurately.

Further, the bonding method of the metal plate or the like according to the present invention secures the suction displacement of the bonding end portion and the surface of the bonding end portion since the bonding agent is cured after the surface of the bonding end portion side surface. There is an effect that one state can be obtained with certainty.

Furthermore, in the method for joining metal plates and the like according to the present invention, the pressing plate is removed after the adhesive is hardened after the surface of the joining end portion side surface, so that it is easy to fill the filler between the metal plates. Can be done.

In the joining method for a metal plate or the like of the present invention, the filler is filled between the metal plates on the other side of the joined end after the pressing plate is removed, so that the appearance of the joined end side surface can be adjusted. .

[0029] Further, in the method for joining metal plates and the like of the present invention, at least the corners on the surface side between the metal plates filled with the filler are formed in a micro-curved shape before filling with the filler at the latest. Later, it is possible to prevent the corner line from appearing to the outside so that a joint mark can be sensed.

Furthermore, in the method for joining metal plates and the like according to the present invention, the filler has a linear expansion coefficient as small as possible. Therefore, expansion and contraction of the filler are suppressed, for example, expansion due to thermal expansion in summer. It is possible to prevent the sense of joining marks.

In the method for joining metal plates and the like according to the present invention, since the adsorbing tool is configured by mounting a magnet block in a housing made of a steel plate having a U-shaped cross section, a feasible configuration of the adsorbing tool can be proposed. it can. Further, in the joining method of the metal plate or the like according to the present invention, the end edge of the housing is disposed so as to protrude from the end face force of the magnet block. It can be fixed.

In the method for joining metal plates and the like according to the present invention, since the gripping portion is provided on the suction tool, the suction tool can be handled easily.

Moreover, since the joining method of the metal plate etc. of this invention connects a some suction tool with a handle, it can handle a some suction tool easily.

Furthermore, since the joining method of the metal plate etc. of this invention grinds smoothly with a sander after hardening of the said filler, the surface of a filler can be ground simply.

[0030] In the method for joining a metal plate or the like of the present invention, a tapping screw having a thin head is used for a screw, the head of the screw is ground after the adhesive is cured, and the screw is attached to the plate body. Since it is left at the joint end, it is possible to temporarily fix the plate with a tapping screw and rationally join various plates such as metal, non-ferrous metal, and non-metal using the bonding strength of the tapping screw. And it can join firmly.

Further, in the joining method of the metal plate or the like according to the present invention, the head of the screw is smoothly ground so that the ground surface of the head and the surface of the joining end are flush with each other. Therefore, the tapping screw is left behind. It can prepare for the coating of the surface of a joining edge part.

Furthermore, in the method for joining metal plates and the like according to the present invention, since the ground surface of the screw head and the surface of the joint end are flush with each other and then the surfaces of the joint are painted, the surface of the joint end is rational. Can be applied to.

In the sander of the present invention, since the grinding plate is provided so as to be able to bend in the thickness direction, the grinding plate can be easily curved along the curved surface of the curved surface to be ground, and can be easily adapted to grinding the curved surface. effective.

In addition, the sander of the present invention is formed in a slender shape in the grinding direction, and the grinding plate can be reciprocated linearly in the length direction. In addition, it is possible to ensure a simple operability and to achieve grinding in a narrow space. Furthermore, the sander of the present invention presses the tip of the grinding plate so that the grinding plate can be moved along the surface of the portion to be ground, so the grinding plate along the curved surface of the curved surface to be ground. To perform the grinding.

[0032] The sander of the present invention is provided with a swinging frame on which the drive unit can be installed, and a swinging lever is swingably connected to a position opposed to the swinging frame, and is attached to an end of the swinging lever. Since the holding plate is rotatably connected in the plate thickness direction, and the grinding plate is attached between the holding plates so as to be able to bend in the plate thickness direction, the grinding plate is displaced according to the surface to be ground, and the surface to be ground is precisely Can be ground.

Further, the sander of the present invention enables the grinding plate to be operated in the length direction and the width direction through the operation of the swing lever, so that it can be used in various grinding directions and various grinding conditions. In addition, there is an effect that a beautiful ground surface can be obtained.

[0033] Furthermore, the sander of the present invention is provided with the drive section so as to be able to vibrate, and the rocking frame and the rocking lever are provided so as to be capable of interlocking via the vibration of the drive part. Can be realized.

The sander according to the present invention protrudes so as to be able to be gripped on the swing frame, so that the operability of the sander can be improved and it can be used easily.

In addition, the sander of the present invention presses the drive unit and displaces the grinding sheet along the surface of the part to be ground, and therefore can easily grind various surfaces to be ground.

Brief Description of Drawings

FIG. 1 is a front view showing an automobile to be repaired having a damaged part in a vehicle body to which the present invention is applied.

FIG. 2 is an enlarged perspective view showing a main part of a joint portion to which the present invention is applied.

FIG. 3 is an enlarged perspective view showing a main part of the repaired state of the joint part according to the present invention, in which a pressing plate is arranged on the surface of the joint end part.

FIG. 4 is an enlarged perspective view showing the main part of the repaired state of the joint according to the present invention, in which an adsorber is installed on a pressing plate disposed on the surface of the joint end.

FIG. 5 is an enlarged perspective view showing the suction tool used in the joining method of the present invention.

[0035] FIG. 6 is an enlarged cross-sectional view showing the main part of the repaired state of the joint according to the present invention, in which the joint ends are spaced apart in the plate thickness direction, and an adhesive is applied between them. And on the surface Place an adsorber on the pressed plate!

FIG. 7 is an enlarged cross-sectional view showing the main part of the repair status of the joint according to the present invention, in which the joint ends are spaced apart in the plate thickness direction, and the joint ends are separated in the plate thickness direction. Indicate the repair status when placed!

FIG. 8 is an enlarged cross-sectional view showing the main part of the repaired state of the joint according to the present invention, with the joint ends spaced apart in the plate thickness direction, and the joint ends in the opposite direction to FIG. Fig. 5 shows the repair situation when they are placed apart.

[0036] FIG. 9 is an enlarged cross-sectional view showing the main part of the repaired state of the joint according to the present invention, in which the joint ends are arranged apart from each other in the thickness direction, and one of the joint ends is abnormal. This shows the repair situation when molded.

FIG. 10 is an enlarged cross-sectional view showing the main part of the repair condition of the joint according to the present invention, showing the situation where the pressing plate placed on the surface of the joint end is removed and the filler is applied to the gap. Yes.

FIG. 11 is a cross-sectional view showing an enlarged main part of the repair status of the joint according to the present invention, showing the situation where the filler filled in the void at the surface of the joint end is ground with a sander. The

FIG. 12 is a front view showing a sander applied to grinding of a filler according to the present invention.

FIG. 13 is a plan view of FIG.

FIG. 14 is a cross-sectional view showing a use state of a sander applied to grinding of a filler according to the present invention, showing a grinding state of a curved portion to be ground.

[0037] FIG. 15 is a perspective view showing a second embodiment of the present invention, in which two metal plates are arranged to face each other, a pressing plate is arranged on the surface of the joining end portion, and adsorbed on the surface It shows the situation where the equipment is installed.

FIG. 16 is a cross-sectional view of FIG.

FIG. 17 is a cross-sectional view showing an enlarged main part of the repaired state of the joint in the second embodiment, and shows a state in which the state force pressing plate in FIG. 16 is removed and a filler is applied to the gap. is doing.

FIG. 18 is an enlarged cross-sectional view showing the main part of the repair state of the joint in the second embodiment, and shows a state where the filler is ground with sander from the state of FIG. FIG. 19 is a perspective view showing a third embodiment of the present invention, in which two suction tools are connected by a needle.

FIG. 20 is a perspective view showing a fourth embodiment of the present invention, in which two plates are arranged apart from each other, and an adhesive is applied to the back surface thereof to superimpose joining pieces. And the surface side force is also screwed in by tapping screws to temporarily fix them.

[FIG. 21] An enlarged cross-sectional view taken along the line A—A in FIG. 20, wherein the flat head of the tapping screw is removed by grinding with a sander.

[Fig.22] Shows the situation where after removing the tapping screw head, a filler was applied to the gap and the surface was coated flush.

FIG. 23 is a front view of a sander showing a fifth embodiment of the present invention, showing the state of use.

[0039] FIG. 24 is an enlarged cross-sectional view of the main part of FIG. 23, showing the mounting state of the swing frame and swing lever, and the holding plate and grinding plate.

FIG. 25 is an enlarged cross-sectional view of the main part of FIG. 23, showing details of the mounting state of the swing frame and swing lever, and the holding plate and grinding plate.

Explanation of symbols

[0040] 2 Metal plate (vehicle side)

4a, 4b, 9a Micro curve

5 Metal plate (repair material)

6, 31 Joining piece (joining allowance)

10 Adhesive

12 Press plate

13 Non-adhesive sheet

15 Adsorber

[0041] 16 housing

17 Magnet block

18 Grip part

19 Filler 20 Sanda

22 Grinding plate

28 Parts to be ground

29 Grinding sheet

[0042] 32 Handle

34 Tapping screw

34a head

35 Paint section

36 Swing frame

37 Drive unit (vibration device)

39 Swing lever

BEST MODE FOR CARRYING OUT THE INVENTION

[0043] Hereinafter, the illustrated embodiment in which the present invention is applied to a method for repairing a damaged part of a car body of an automobile will be described. In FIGS. 1 to 11, reference numeral 1 denotes a car to be repaired, and the car body 2 is repaired. The side plate 5 has a damaged portion 3 in a part thereof.

When repairing the damaged part 3, first, the damaged part 3 is cut into an appropriate shape using an appropriate tool, and the periphery of the cut part is bent inwardly using an appropriate tool (not shown). A tapered opening surface 4 is formed on the surface.

The opening surface 4 is bent by forming a stepped portion, which is an addition of the thickness of the repaired side plate 5 and the coating thickness of the adhesive described later, and the edge side of the flat cut portion is the repaired side plate 5, the joint margin 6 is formed as a joint piece integral with the repaired side plate 5.

R-shaped micro-curved portions 4a and 4b are formed on the surface side of the opening surface 4, that is, the outer bent portion and the inner bent portion, by the tool or another tool.

On the other hand, a repair side plate 7 made of a metal plate having the same quality and thickness as the repair side plate 5 of the vehicle body 2 is prepared, and the repair side plate 7 has a similar shape slightly smaller than the shape of the cut portion, Alternatively, the car body part of the damaged part 3 is formed in a shape excluding the cut part.

The repair side plate 7 has a joint allowance 8 substantially equal in width to the joint allowance 6 around its end portion. A tapered opening surface 9 similar to the opening surface 4 is formed at the edge of the surface, and a rounded curved portion 9a similar to the above is formed on the surface side by the tool or another tool.

[0045] In this case, the opening surfaces 4 and 9 are not limited to the tapered shape, and it is also possible to form the corners on the surface side in a rounded shape, and the micro-curved portions 4a, 4b and 9a are initially formed with force. Instead, it may be formed before filling the gap 11 with the filler described later. Furthermore, in this embodiment, the bent portion is formed on the repaired side plate body 5, but on the contrary, the bent portion may be formed on the repaired side plate body 7.

[0046] Thereafter, the adhesive 10 is applied to the surface of the joint allowance 6, the joint allowance 8 is overlapped on the adhesive 10, and the opening surface 4 of the repaired side plate 5 on the vehicle body 2 side; The opening surface 9 of the joint allowance 8 is disposed opposite to each other with a gap 11 therebetween, and these states are held via the pressing plate 12 before the adhesive 10 is cured.

In the embodiment, the adhesive 10 is composed of a main agent mainly composed of epoxy resin and a curing agent.

[0047] As the pressing plate 12, a metal plate such as an aluminum plate having a low relative permeability or a synthetic resin plate is used, which is disposed along the flat surface of the vehicle body 2 or the repair side plate 7, or on a curved surface. A non-adhesive sheet 13 such as a polyethylene film is pasted on the back surface.

An index line 14 is formed vertically in the center of the surface of the pressing plate 12, and the index line 14 is positioned at the center of the joint end of the repaired side plate body 5 and the repair side plate body 7 so that the pressing plate 12 is equally left and right. It can be placed in.

[0048] In this case, as other means for enabling the pressing plate 12 to bend along the curved surface of the repaired side plate body 5 or the repaired side plate body 7, notches or necks are provided at a plurality of vertical and horizontal positions of the pressing plate 12. It is also possible to provide a portion (both not shown) to facilitate bending, or to form the pressing plate 12 narrowly or shortly and to arrange a plurality of these.

Thereafter, a plurality of or a single suction tool 15 is disposed on the pressing plate 12 across the joint between the repaired side plate body 5 and the repaired side plate body 7.

The adsorber 15 includes a steel plate housing 16 having a high relative permeability, and a magnet pro- gram that is fixed inside the housing 16 and has a permanent magnet force that is light and has a large magnetic force. The housing 16 is formed by bending a steel plate into a substantially U-shaped cross section, and the edge of the bent piece 16a slightly protrudes from the magnet block 17 so that a magnetic pole can be formed. e is the amount of protrusion.

In the figure, reference numeral 18 denotes a substantially T-shaped gripping portion protruding from the center of the housing 16 to hold the suction tool 15.

[0050] Therefore, in the adsorbing tool 15, the edges of the bent pieces 16a, 16a are in close contact with the pressing plate 12, and the lines of magnetic force emitted from the magnet block 17 are transmitted from the edges of the bent pieces 16a, 16a to the pressing plate 12. The magnetic circuit that passes through the air gap 11 from the joint margin 8 and the repaired side plate 5 on the back side is formed.

Then, while the adhesive 10 is cured, the end portion of the repaired side plate body 5 on the back side and the joining allowance 8 are sucked and displaced so that the surface of the pressing plate 12 can be formed flush with the reference surface. Yes.

Therefore, for example, as shown in FIG. 7, the bent portion formed at the joint portion of the repaired side plate body 5 is bent shallowly, or a large amount of the adhesive 10 is applied, so that the joint margin 8 of the repair side plate body 7 is increased. If the side plate 5 to be repaired protrudes outward from the side plate 5 to be repaired and there is a small gap S between the side plate 5 to be repaired and the pressing plate 12, the side plate 5 to be repaired is suction-displaced by the suction tool 15 and viewed in the direction of the arrow. In other words, the joint 8 side maintains the original suction state with the pressing plate 12, and the repaired side plate 5 and the surface of the joint 8 form a flush state.

Therefore, the adhesive layer 10 having a certain thickness is formed between the joint allowances 6 and 8.

Thereafter, the adhesive 10 is cured, the surfaces of the repaired side plate body 5 and the joint allowance 8 are kept flush, and a constant adhesive strength can be obtained by the adhesive layer 10 having the constant thickness.

[0052] In this case, when the side plate 5 to be repaired is suction-displaced to the suction tool 15, a part of the adhesive 10 is pushed into the gap 11, but the adhesive 10 comes into contact with the non-adhesive sheet 13 and is pressed. Since the contact with the plate 12 is avoided, the pressing plate 12 cannot be removed after the adhesive 10 is cured.

In addition, a part of the adhesive 10 is pushed out to the end of the joining margin 6 and the back surface of the repair side plate body 7 to reinforce their fixing force, but even if the adhesive 10 is pushed out in this way, Since they are placed on the back side of the repair side plate 5 and the repair side plate 7, the surface appearance of the plates 5, 7 Will not be damaged.

[0053] Contrary to the above, for example, the bent portion formed in the joint portion of the repaired side plate body 5 is bent deeply or the adhesive 10 is applied in a small amount, so that the repaired side plate body 5 has the joint allowance 8. As shown in Fig. 8, there is a small gap S between the joint allowance 8 and the pressing plate 12.

2

In this case, the joining margin 8 side is sucked and displaced by the suction tool 15 and moves in the direction of the arrow, that is, the surface side, and the repaired side plate body 5 side maintains the original suction state with the pressing plate 12, and the repaired side plate body 5 and the surface of the joint allowance 8 form a flush state.

Therefore, the adhesive layer 10 having a constant thickness is formed between the joint allowances 6 and 8.

In this case, even if the repair side plate 7 is suction-displaced as described above, there is no problem in the adhesion by the adhesive 10 as long as the amount of the adhesive 10 applied is not extremely small.

Further, even in the case shown in FIG. 9 in which the joining margin 6 is not formed in parallel with the joining margin 8 because the bending process of the joining margin 6 is bad, the pressing plate 12 extends over the repaired side plate body 5 and the joining margin 8. By placing the suction tool 15 on this and displace the repaired side plate body 5 and the joint allowance 8 by suction, they form a flush state, and the adhesive 10 is cured in this flush state, The repaired side plate 5 and the joint allowance 8 maintain this state.

[0056] In this case, by bending the end portion of the joint margin 8 facing the gap 11 at a right angle, there is no need to worry about the formation of a groove on the opening surface 9, and the subsequent pressing plate 12 can be removed or the gap 11 can be removed. When filling the filler, there is no need to worry about your fingers touching the burr.

[0057] It should be noted that a force for arranging a plurality of adsorbing tools 15 at a predetermined interval on one pressing plate 12 cannot be obtained in a uniform bending process on the repaired side plate body 5, or an adhesive. If there is unevenness in the application amount of 10, place the suction tool 15 in an appropriate posture at the relevant part and promote the formation of the repair side plate 5 and the joint allowance 8 flush with each other. This situation is shown in Figure 4.

Thus, after the adhesive 10 is cured, the adsorbing tool 15 is removed, and the pressing plate 12 is removed.

At that time, as described above, since the pressing plate 12 avoids the adhesion of the adhesive 10, the suction tool 15 can be easily removed by tilting the gripping portion 18 or the like.

[0059] Thereafter, the gap portion 11 is filled with a filler 19. Filler 19 is an epoxy resin A material having wearability is used, which basically uses a material having a small linear expansion coefficient to suppress temperature expansion and contraction at the joint as much as possible. Is prevented and the appearance of the joint trace is avoided.

[0060] The filler 19 is initially filled in the gap portion 11 as shown in FIG. 10, and the surface of the filler 19 is ground by the sander 20 and leveled.

As shown in FIGS. 12 to 14, the sander 20 becomes a force with a sander body 21 and a grinding plate 22, and the sander body 21 is formed in an elongated cylindrical shape, and a reciprocating straight line using compressed air as an operating source therein. A motion mechanism and a drive mechanism (both not shown) are built in, one end of which is connected to an air hose 23 connected to a compressed air source, and one end of an operation lever 24 is rotatably connected to the outer peripheral surface. Yes.

[0061] In an embodiment, the drive mechanism includes a mechanism that converts a rotational motion into a reciprocating linear motion, and the operation is reciprocable within a range of 5 to: LOmm. As a drive source, it is also possible to use a power source instead of compressed air.

[0062] A substantially Z-shaped connecting rod 25 projects from the other end of the sander body 21, and its base end is linked to the drive mechanism and is configured to be movable with the drive mechanism. The front end portion of the connecting rod 25 is arranged to be offset downward from the axial direction of the base end portion, and its shape is expanded to a rectangular shape, and the distal end portion is made of a synthetic resin having relatively rigidity. Plate 26 is screwed.

[0063] The holding plate 26 is formed in a substantially square shape, and the base end side of the grinding plate 22 is attached to the holding plate 26 via a double-sided adhesive tape or adhesive.

The grinding plate 22 is formed of a synthetic resin material, such as soft salt and gel, which is rich in elasticity and flexibility, and is formed in a horizontally long rectangle longer than the holding plate 26. The tip of the grinding plate 22 is lightly pressed with a finger 27. By being pressed, it is configured to be able to bend in the plate thickness direction, and can be freely deformed to the curved surface 28a of the surface 28 to be ground.

A grinding sheet 29 coated with a predetermined barrel is attached to the lower surface of the grinding plate 22 via a surface fastener (not shown) so as to be detachable, and can be moved together with the grinding plate 22.

[0064] When the sander 20 is used to grind and level the surface of the filler 19,

After the filler 19 is dried and cured, a grinding sheet 29 having a predetermined grain size is placed under the grinding plate 22. Attach the air hose 23 to a compressed air source such as an air compressor. Next, the sander body 21 is held, the grinding sheet 29 is pressed against the surface of the filler 19, the finger 28 is attached to the tip of the grinding plate 22 and lightly pressed, and the grinding plate 22 or the grinding sheet 29 is pressed. Is made to follow the surface or curved surface shape of the joint allowances 6 and 8.

[0065] Thereafter, the operating lever 24 is pressed, compressed air is supplied to the inside of the sander body 21, the internal driving mechanism is driven, and the connecting rod 25 linked to the mechanism is reciprocated linearly. For this reason, the reciprocating linear motion is transmitted from the connecting rod 25 to the grinding plate 22 through the holding plate 26, and the grinding sheet 29 moves along the plate 22 to grind the surface of the filler 19.

In the meantime, the finger 28 is attached to the tip of the grinding plate 22 and lightly pressed, so that the grinding plate 22 or the grinding sheet 29 is aligned with the surface of the joining allowances 6 and 8 and the curved surface shape.

Therefore, not only when the surfaces of the repaired side plate body 5 and the repaired side plate body 7 are flat surfaces, but also the curved surface 28a as shown in FIG. 14, the curved surface 28a is in close contact with and encloses the brackets. Therefore, the filler 19 can be easily and uniformly ground even if it is not a skilled person.

[0067] When the surface of the repaired side plate body 5 or the repaired side plate body 7 grinds the grinding target portion having a concave curved portion, the grinding plate 22 or the grinding sheet 29 is pressed against the grinding target portion. The plate 22 bends against its own elasticity, and its base side is supported by a holding plate 26 having rigidity. Therefore, it can be easily bent to a desired curvature, and even when grinding such a concave curved portion, basically, the tip of the grinding plate 22 is lightly pressed with a finger 28 attached to the shape of the curved surface of the portion to be ground. Work along. This situation looks like the phantom line in Figure 12.

[0068] After the grinding operation is finished, when the tip force of the grinding plate 22 is also released from the finger 27, the grinding plate 22 recovers its original straight state due to its own elasticity, and the grinding sheet 29 moves along with it.

When the grinding sheet 29 is worn by use or replaced with a grinding sheet 29 of another roughness, the fastener is peeled off and replaced with a desired one.

[0069] In addition, the above-mentioned sander can be used by manually reciprocating, and in that case, the reciprocating linear motion mechanism equipped in the sander body 21 and its driving mechanism may be omitted. By doing so, the sander can be made lighter and cheaper, and the manual workability can be improved. [0070] In this way, after grinding the surface of the filler 19, a primer surfacer is applied as a primer to the surface of the joint, and a paint of the same color as that of the vehicle body 2 is applied to the dry word to complete a series of repair work. finish.

After the repair, the joint including the grinding portion of the filler 19 is repaired by being leveled in the same manner as the surrounding surface and curved surface, so that the joint is sensed integrally with the surrounding.

However, the filler 19 has a smaller linear expansion coefficient than conventional ones, and adopts one! /. Therefore, the expansion in summer and the shrinkage in winter are suppressed as much as possible. It prevents the filler 19 from peeling and bulging, avoids the appearance of joint marks, and keeps the balance.

FIGS. 15 to 25 show other embodiments of the present invention, and the same reference numerals are used for portions corresponding to the configurations of the above-described embodiments.

Among these, FIGS. 15 to 18 show a second embodiment of the present invention, which is an alternative to superposing and arranging the joining end portions of the repaired side plate body 5 and the repair side plate body 7 in the plate thickness direction. Are placed on the same surface with the gap 11 interposed therebetween, and the adhesive 10 is applied to the back surface thereof, and the above-mentioned plate members 5, 7 and the joining piece 31 separate from each other are superposed. ing.

[0072] Then, before the adhesive 10 is cured, the pressing plate 12 is superposed on the surface of the joining end portion of the repaired side plate body 5 and the repair side plate body 7, and one or more adsorbing tools are attached to the pressing plate 12. 15 is installed, the joining end portions are attracted and displaced by the magnetic force of the adsorbing tool 15, and the surface of the joining end portion is made uniform with the pressing plate 12 as a reference plane.

Accordingly, it is not necessary to form a tapping screw or a screw hole thereof as in the prior art, and accordingly, the above operation can be performed easily and quickly, and a precise uniformity of the joint end surface can be obtained.

Thereafter, the adsorber 15 is removed in the same manner as described above, the pressing plate 12 is removed, the gap portion 11 is filled with the filler 19, and after drying and curing, the sander 20 is used to remove the filler 19. Grind the surface.

FIG. 19 shows a third embodiment of the present invention. In this embodiment, two adsorbing tools 15 are connected by a substantially U-shaped handle 32 so that the attaching / detaching operation can be easily performed. The

In this case, the suction tool 15 is connected to be slightly spaced from the opening width of the gap 11 so that it can be adapted to installation of various joint end portions of the repaired side plate body 5 and the repair side plate body 7. 20 to 22 show a fourth embodiment of the present invention. In this embodiment, the joint end portion of the repaired side plate body 5 and the repair side plate body 7 is used by using the adhesive 10 and the joint piece 31. FIG. When joining, until the adhesive 10 is solidified, it relates to a method of temporarily fixing both joint ends.Similar screw holes 33 are provided in the longitudinal direction at the joint ends of each plate and the joint piece 31. A plurality of screws are formed, and tapping screws 34 are screwed into these screw holes 33 and temporarily fixed.

Therefore, the plate bodies 5 and 7 are not limited to metal plates but can be applied to joining various plate materials such as non-ferrous metals and non-metals.

[0075] The head 34a of the tapping screw 34 is formed flat, and a tool is formed on the outer surface of the head 34a.

It has a sleeve or engagement groove that can be engaged with (not shown), and has a head thickness of about 1 mm or less.

[0076] When the joining end portion of the repaired side plate body 5 and the repaired side plate body 7 is temporarily fixed using the tapping screw 34, the adhesive 10 is applied to the back surface thereof, and the joining piece 31 is polymerized thereon. At the same time, the screw holes 33 are aligned, and the tapping screw 34 is screwed into the screw holes 33 using an appropriate tool.

[0077] After the adhesive 10 is solidified, a belt sander or the sander is pressed against the head 34a, and the sander is driven to scrape off the head 34a.

In this case, the head portion 34a is formed to be very thin and provides temporary fixing of the plate bodies 5 and 7, and is quickly scraped off by the sander. Screw 34 is not accumulated in the screw shaft, and the excised part is plate.

Forms flush with surfaces of 5 and 7. This situation is shown in Figure 21.

[0078] After that, a primer surface is applied as an undercoat to the surface of the plate body, and after drying, a paint 35 having the same color as that of the vehicle body 2 is overcoated to complete a series of repair work.

Therefore, the screw hole 33 is filled with a filler or an adhesive as in the conventional case, and the tapping screw 34 is left on both plate bodies 5 and 7 of the joint portion, thereby strengthening the joint strength with the joint piece 31.

FIGS. 23 to 25 show a fifth embodiment of the present invention. This embodiment relates to the improvement of the sander 20, and instead of grinding by pressing the tip of the grinding plate 22 with the fingers 27, the sander Grab the top of 20 and grind. That is, the sander 20 is provided with a vibration device 37 on a substantially U-shaped rocking frame 36. The vibration device 37 is formed in a substantially cylindrical shape that can be gripped by a hand 38, and is compressed by compressed air. A drivable turbine (not shown) is provided, and the turbine can swing and vibrate in a spherical shape.

[0080] The upper part of the swing lever 39 is connected to a pair of bent pieces 36a of the swing frame 36 via a universal joint 38 so as to be rotatable and swingable in a spherical shape. In addition, the rectangular holding plate 26 is connected to the pin 40 via the pin 40 so as to be rotatable in the vertical direction, and the connecting position is distributed to the inside and outside 2 to 1 along the length direction of the holding plate 26 (L: L = 2: 1), between the holding plates 26 and 26,

1 2

The cutting plate 22 and the grinding sheet 29 are mounted so as to be curved and movable.

[0081] When the surface of the filler 19 is ground by the sander 20, the sander 20 is moved to a desired position by holding the vibration device 37, and the grinding sheet 29 is pressed against the portion to be ground 28 to be filled. Position the agent 1 9 so that it wraps around the surface.

As a result, the holding plates 26 and 26 are rotated around the pin 40 along the surface shape of the portion 28 to be ground, and the grinding plate 22 between the holding plates 26 and 26 is gently curved, thereby causing a grinding shear. -G 29 bends along with this.

[0082] When compressed air is supplied to the vibration device 37 under such a situation, the vibration device 37 swings and vibrates in a spherical shape, and the swing frame 36 and the bent piece 36a move together to swing the vibration device 37. The movable lever 39 is rotated and swung in a spherical shape around the self-joint 38.

For this reason, the holding plates 26 and 26 are swung in the length direction and the width direction, and the grinding plate 22 and the grinding sheet 29 are moved together to grind the surface of the filler 19 in multiple directions.

Therefore, the operator can grip the vibration device 37 and lightly press it to reduce the burden of labor, and it is not necessary to move the sander 20 back and forth. The sheet 29 moves in multiple directions to precisely grind the surface of the filler 19.

[0083] In this case, when the grinding sheet 29 grinds the raised surface of the filler 19, an upward force acts on the inner side of the support plate 26 and a downward force acts on the outer side. This downward force corresponds to twice the upward force depending on the distribution ratio, and this presses the rising surface of the filler 19.

Therefore, the holding plate 26 outside the pivotal support position has a surface area 1 Despite being Z2, even grinding is possible.

Industrial applicability

As described above, the joining method and sander of the metal plate or the like according to the present invention are not particularly suitable for joining plate bodies having complicated curved surfaces, and joining the repaired portion flatly or three-dimensionally, so that the precision can be accurately measured. As this type of joining work can be performed reasonably and easily, for example, damaged parts of metal plates such as car bodies and non-ferrous metal or non-metallic peripheral walls such as buildings and machines. Suitable for repair.

Claims

The scope of the claims

[I] Joint end portions of two metal plates to be joined to each other are arranged apart from each other in the plate thickness direction or in a direction perpendicular to the plate thickness, and the metal plate is integrally or separately joined to one side of the joint end portion. In a joining method such as a metal plate that places a piece and bonds the joining end and the joining piece, a pressure plate is placed over the other surface of the joining end before the adhesive is cured. An adsorbing tool having a magnetic force is installed on the surface of the pressing plate, the pressing plate is brought into close contact with the other surface of the joining end portion through the magnetic force of the adsorbing tool, and the joining end portion is interposed through the magnetic force. A method for joining metal plates or the like, characterized in that the surface of the two joint ends is flush with respect to the pressing plate.

2. The method for joining metal plates and the like according to claim 1, wherein the two joining end portion side surfaces are flush with each other in a flat or curved shape.

[3] The method for joining metal plates or the like according to claim 1, wherein the pressing plate is formed of a member having a low relative magnetic permeability.

4. The method for joining metal plates and the like according to claim 1, wherein the pressing plate can be bent in the thickness direction.

5. The method for joining metal plates and the like according to claim 1, wherein a plurality of pressing plates are arranged adjacent to each other on the other surface of the joining end portion.

6. The method for joining metal plates and the like according to claim 1, wherein a non-adhesive sheet is attached to the back surface of the pressing plate.

7. The method for joining metal plates and the like according to claim 1, wherein one or more suction tools are installed on the pressing plate.

8. The method for joining metal plates and the like according to claim 1, wherein the adhesive is cured after the surface of the joining end portion side surface.

9. The joining method for a metal plate or the like according to claim 8, wherein the pressing plate is removed after the surface of the joining end portion side surface is flushed and the adhesive is cured.

10. The joining method for a metal plate or the like according to claim 1, wherein after the pressing plate is removed, a filler is filled between the metal plates on the other side of the joining end portion.

[II] The method for joining metal plates or the like according to claim 10, wherein at least the corners on the surface side between the metal plates to be filled with the filler are formed in a micro-curved shape before filling with the filler at the latest.

12. The method for joining metal plates and the like according to claim 10, wherein the filler has a linear expansion coefficient as small as possible.

13. The method for joining metal plates or the like according to claim 1, wherein the attracting tool is configured by mounting a magnet block in a steel plate housing having a U-shaped cross section.

14. The method for joining a metal plate or the like according to claim 13, wherein the edge of the housing is arranged so as to project the end face force of the magnet block.

[15] The method for joining metal plates or the like according to claim 1 or 13, wherein a grip portion is provided on the suction tool.

[16] The method for joining metal plates or the like according to claim 1 or 13, wherein a plurality of suction tools are connected with a needle.

17. The method for joining metal plates and the like according to claim 9, wherein after the filler is cured, it is ground smoothly with a sander.

[18] The joining end portions of the two plate bodies to be joined to each other are arranged apart from each other in the plate thickness direction or in the direction perpendicular to the plate thickness, and the joining pieces are integrated with or separate from the plate body on one side of the joining end portion. In the joining method of a metal plate or the like in which at least one of the plate members is screwed to the joining piece, a thin head is attached to the screw. A method for joining metal plates or the like, comprising using a tapping pin screw, grinding the head of the screw after the adhesive has hardened, and leaving the screw at the joining end of the plate.

19. The method for joining metal plates or the like according to claim 18, wherein the head of the screw is smoothly ground so that the ground surface of the head is flush with the surface of the joining end.

20. The method for joining metal plates and the like according to claim 18, wherein the ground surface of the screw head and the surface of the joint end are flush with each other, and then the surfaces are painted.

[21] A sander comprising a drive unit and a grinding plate that operates in conjunction with the drive unit and can hold a grinding sheet, wherein the grinding plate is provided so as to be able to bend in the plate thickness direction. Sanda.

22. The sander according to claim 21, wherein the grinding plate is formed in an elongated shape in the grinding direction, and the grinding plate can be operated in a rectilinear manner in the length direction.

[23] The tip of the grinding plate can be pressed to move the grinding plate along the surface of the part to be ground 23. A sander according to claim 21 or claim 22.

[24] A swing frame is provided on which the drive unit can be installed, and a swing lever is swingably connected to a position opposite to the swing frame, and a holding plate is attached to the end of the swing lever in the thickness direction. 22. The sander according to claim 21, wherein the sander is rotatably connected, and the grinding plate is attached between the holding plates so as to be able to bend in the thickness direction.

25. The sander according to claim 24, wherein the grinding plate is operable in the length direction and the width direction through the operation of the swing lever.

26. The sander according to claim 24, wherein the drive unit is provided so as to be able to vibrate, and the swing frame and the swing lever are provided so as to be capable of being interlocked via vibration of the drive unit.

27. The sander according to claim 24, wherein the drive unit protrudes so as to be able to be gripped on the swing frame.

28. The sander according to claim 24, wherein the driving unit is pressed to displace the grinding sheet along the surface of the part to be ground.