JP3024010U - Car sheet metal fixer - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To deform a curved surface of a sheet metal without extending correction points in the surface direction. A file body is bent at the center to have a crank shape. The cross-sectional shape of the right beating portion is a curved cross-section, and the file teeth are arranged on the convex surface side. The same file teeth are also arranged on the left grip 3. Round the tip corner of the striking part 2. [Effect] Since a large amount of micro scratches are engraved on the curved surface to be corrected, the curved surface is deformed in the vertical direction without extending in the surface direction. Also, since the curved surface of the striking surface makes line contact with the modified curved surface, the impact stress is more dispersed than in the conventional method.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a sheet metal correction tool used for sheet metal painting work of automobiles. It is a hitting tool with file teeth that strikes and corrects deformed parts.

[0002]

[Prior art]

 In sheet metal work, the damaged part is repaired with a hammer such as a hammer. Put the contact plate on the back side of the deformed curved surface and hit it from the front side with a hitting tool. Since metal is ductile, it stretches when tapped. This small amount of deformation affects the surrounding curved surface. This is a reason why experience and close attention are required.

[0003]

[Problems to be solved by the device]

 It is said that it is difficult to transfer a uniform deforming stress to the restored curved surface because the hammer with a flat hit surface comes into point contact with the curved surface. Further, due to the above-mentioned ductility characteristics, the point is locally spread and the opposite surface is likely to project. The present invention solves this problem, and will be described in detail below with reference to the drawings.

[0004]

[Means for Solving the Problems]

 The file body is bent into a crank shape, and the cross sections of the striking part and the gripping part have curvature, and the file teeth are arranged on the convex surface of curvature of the striking part and gripping part, and rounded parts are provided at each corner. Hold it. Since the file teeth engrave a large number of minute recesses on the curved surface of the correction area, local extension is prevented. In addition, since the striking part has a curved cross section, the striking part makes a line contact with the repaired curved surface and the impact force is dispersed.

[0005]

[Embodiment of device]

 The center of the file body 1 is repeatedly bent and deformed into a crank shape, and the cross section of the striking part 2 is given a curved stroke. As shown in Fig. 2, the center of the striking surface is higher than the surrounding area. The file teeth 4 are arranged on this striking surface. A rounded portion is provided at the tip corner portion of the hitting portion 2. The gripping portion 3 is substantially parallel to the striking portion 2 and has a rectangular cross-section, but like the striking portion 2, a curved cross-section may be adopted. The file teeth 4 are the same. Apply the backing plate to the back side of the modified part of the automobile body, grip the gripping part 3, and hit it with the file tooth surface of the striking part 2. The striking portion 2 having a curved cross section makes a line contact with this corrected portion (often a curved surface) to disperse the impact force. As a result, a uniform stress is applied to the prescribed location to complete the expected deformation. When the surface of the file tooth 4 is microscopically observed, a large number of minute projections are arranged, and these minute projections engrave a large number of micro recesses (micro scratches) on the curved surface of the metal. When the curved surface to be corrected is observed microscopically, due to micro scratches, that part does not extend in the surface direction, but deforms only in the vertical direction. By repeating this beating, the local correction is smoothly performed.

A coating process is performed after the sheet metal. Since the microscopic scratches are dispersed on the surface of the modified curved surface, the adhesion of the paint is improved, and the paint finish is dramatically improved compared to the conventional hammer. The rounded portion at the tip of the striking portion 2 is used for minute correction of a curved surface. The file teeth 4 of the grip portion 3 are flat, but may be curved and can be used in the same manner as the striking portion. It is said that if the file teeth 4 are flat, it is difficult to accurately apply the tooth portion to the corrected portion. In the present invention, since the file teeth 4 of the striking part 2 have a curved cross section, it is possible to accurately apply the teeth to a minute portion.

[0007]

[Effect of device]

 In short, the present invention alternately bends the center of the file body 1 to form a striking part 2 and a gripping part 3 which are parallel to each other, and forms a curved surface in the lateral direction of the striking part 2 and a file tooth 4. Since it is located on the convex side of curvature, it can be deformed only in the vertical direction without extending the metal curved surface to be corrected in the surface direction, and it is possible to provide an automobile sheet metal correction tool suitable for local sheet metal. Further, since the cross section of the hitting portion 2 is a curved cross section, a uniform impact force (deformation force) can be applied along the curved metal surface.

[Brief description of drawings]

FIG. 1 is a front view.

FIG. 2 is a side view.

FIG. 3 is a plan view.

[Explanation of symbols]

 1 File body 2 Strike part 3 Grip part 4 File tooth

Claims (2)

[Scope of utility model registration request] 1. The file body 1 is alternately bent at the center,
An automobile sheet metal repair tool comprising a striking part 2 and a gripping part 3 which are parallel to each other, the lateral direction of the striking part 2 is a curved surface, and the file teeth 4 are located on the convex side of this curvature. 2. The file main body 1 is bent in a crank shape so that the cross sections of the striking part 2 and the gripping part 3 have curvatures, and the file teeth 4 are arranged on the curved convex surfaces of the striking part 2 and the gripping part 3. Also, an automobile sheet metal repair tool that has rounded parts at each corner.