JP4912650B2 - Sheet metal drawer and method for repairing vehicle body panel using the same - Google Patents

Description

  The present invention relates to a sheet metal drawer and a method for repairing a vehicle body panel using the same.

  In recent years, as a method for easily and quickly restoring a dent generated in a metal plate material, for example, an automobile body (vehicle body panel) that has been dented due to an accident, the dent is removed from the outside of the vehicle body panel by using various sheet metal drawers. The method of pulling out is performed. According to such a method, it is possible to perform the repairing process only on the front surface side of the recessed portion without exposing the back surface of the recessed portion to be repaired, and the working time can be greatly shortened.

  Conventionally, as a sheet metal drawing tool (puller) used in such a repair method, generally, a welding tip for welding electrodes (also referred to as a welding tip) is provided at the tip of the rod, or a hook is used as a rod. The thing etc. which were provided in the front-end | tip of are provided.

  Among these, in the drawing tool provided with the welding tip, after welding the welding tip to the recessed portion of the body panel to be repaired, the rod is pulled to relieve the dent, and in the drawing tool provided with the hook, A hook is hooked directly or indirectly on a washer or a perforated pin welded to a sheet metal surface, and the rod is similarly pulled to ease the dent.

  Patent Documents 1 to 5 exist as prior literature on such a sheet metal drawing tool or puller.

  In Patent Document 1 (Japanese Patent Laid-Open No. 7-303920), a grip width adjusting means for adjusting the grip width between the main lever and the second lever is adjusted so that the grip width of the operation means can be adjusted to a grip width suitable for the operator. In this document, it is also proposed that the left and right legs of the leg are made independent and the positions of the left and right legs are moved.

  Further, in Patent Document 2 (Japanese Patent Application Laid-Open No. 10-328739), a sheet metal that can be pulled out easily and appropriately with a weak force by using a lever principle, a depressed portion of a sheet metal such as a car body of an automobile. The repair method of this and the tool of the simple structure used for this are proposed.

  Further, in Patent Document 3 (Japanese Patent Application Laid-Open No. 2004-154855), the adjustment of the protruding amount of the spot welding electrode rod is performed simply, accurately and quickly, and the rotation position of the stand is adjusted according to the damage state of the damaged part. Protrusion amount adjusting means for adjusting the protrusion amount of the spot welding electrode rod in the direction of the temporary welded portion and the direction of the temporary welding portion of the spot welded electrode rod after the temporary welding so that the change or replacement can be performed easily and quickly. And a pulling amount adjusting means for adjusting the pulling amount in the opposite direction, and a puller for repairing a dent in a metal plate material, which further includes a plurality of types of stand members having different sizes and shapes.

  Conventionally, the amount of damage is also measured before the repair work is performed, and the following Patent Documents 4 and 5 exist as such prior documents.

  In Patent Document 4 (Japanese Patent Laid-Open No. 2000-142335), vehicle damage can be easily evaluated and recorded, and can be slid to the center of the plate-like body so that the repair method can be accurately known. There has been proposed a vehicle repair index device that provides a simple gauge, measures the degree of vehicle damage based on the slide amount of the gauge, and indexes a treatment method for repairing the damage.

Further, in Patent Document 5 (Japanese Patent Laid-Open No. 9-206833), in a panel sheet metal drawing method using an automobile repair panel sheet metal drawing tool and a metal pin, a straight line is formed at the end of the metal pin in the process of sequentially drawing the metal pin. It is described that work is performed while applying a ruler and visually confirming the state of dents on the panel surface (paragraph number [0004] of the same document).
JP-A-7-303920 Japanese Patent Laid-Open No. 10-328739 JP 2004-154855 A JP 2000-142335 A JP-A-9-206833

  As described above, a number of sheet metal drawing tools have been proposed in the past, and an instrument or method for measuring the depth of the dent and specifying the panel drawing amount prior to the drawing work has been proposed. At the same time, in the conventional sheet metal drawer, the amount of drawer measured prior to the drawer operation cannot be used effectively.

  For example, in Patent Document 3, it is described that the pull-out amount of the panel can be adjusted by the pull-up amount adjusting means, but the metal plate material dent repairing puller described in this document is operated by compressed air. Therefore, in order to adjust the pull-out amount of the panel, the pull-up amount adjusting means must be adjusted each time, and the pull-out amount cannot be adjusted without adjusting the pull-up amount adjusting means. Yes. Since the adjustment of the pull-up amount adjusting means for each pull-out point is difficult to accept in the actual pull-out operation, after all, the entire panel is pulled out with the pull-up amount set initially, and the pull-out amount measured first Cannot be used effectively. Further, the sheet metal drawing tool described in this document is troublesome in its operation such as adjustment of the pull-up amount adjusting means, and there is a possibility that it becomes an obstacle in work efficiency.

  Accordingly, the present invention provides a sheet metal drawing tool that can effectively use the measurement result of the depth of the dent measured prior to the drawing work and can freely adjust the drawing amount without troublesome operations. It is to provide.

  In addition, the present invention provides a sheet metal drawing tool that reduces the force required for the drawing work and can be easily drawn out even by an operator having a weak force (particularly gripping force).

  In the sheet metal drawing tool according to the present invention, a ratchet mechanism is used as a mechanism for pulling the shaft having a connection tool with a sheet metal surface at the tip, and as a result, the panel pull-out amount by operating the operation lever once This is a sheet metal drawer that can accurately pull out the panel, reduce the force required to operate one sea, and reduce the panel drawing work.

  That is, in order to solve the above-mentioned problems, the present invention is a sheet metal drawing tool for pulling out a sheet metal surface, and is provided with a base frame to which a seat for contact with the sheet metal surface is attached, and a base frame that can be moved forward and backward. A shaft provided with a connection tool to the sheet metal surface at the tip, an operation lever as an operation portion when the shaft is retracted, and a first ratchet mechanism that retracts the shaft in accordance with the operation of the operation lever. A sheet metal drawing tool is provided.

  Such a first ratchet mechanism includes a rack provided on the shaft and a ratchet claw that urges the rack in the backward direction of the shaft by operation of the operation lever. A claw may be provided, the rack may be moved by operating the operation lever, and the ratchet claw provided on the shaft may be formed so as to be urged in the retracting direction of the shaft.

  In addition, the ratchet pawl used in combination with the rack as described above is a spring so that the engagement between the two is not released when the vehicle body panel is pulled out (that is, the shaft is retracted). It is desirable that the elastic member bites into the rack by other elastic members.

  Furthermore, it is preferable that the operating mechanism includes a second ratchet mechanism that prevents the shaft retreated by the first ratchet mechanism from moving forward. This second ratchet mechanism can be composed of a rack provided on the shaft and a ratchet pawl that meshes with the rack regardless of the operation lever. By including such a second ratchet mechanism, the operating lever is operated once to retract the shaft by a predetermined amount, and then the operating lever is retracted again by the previous operation even if the operating lever is returned to the original position again. The position of the shaft can be maintained by this second ratchet mechanism.

  Therefore, by providing the second ratchet mechanism, the shaft can be retracted by the first ratchet mechanism, that is, the vehicle body panel can be pulled out repeatedly. If the distance of the shaft that moves by operating the operation lever once is set by the rack tooth interval, the length of the ratchet claw, etc., how many times the operation lever is operated or how many ratchet claws By measuring whether or not the rack teeth have been moved, it is possible to accurately adjust the retraction amount of the shaft, and hence the pull-out amount of the vehicle body panel. For example, when the ratchet pawl meshing with the rack is moved in the retracting direction of the shaft by pulling the operation lever, the amount of movement of the ratchet pawl that moves by one gripping operation is specified, If the number of rack teeth existing in the amount of movement is specified, the number of rack teeth to which the ratchet pawl moves when the attracted control lever is returned to the original position is specified by the hand feeling or sound. The shaft can be retracted by an intended amount by returning it by a predetermined amount and pulling the operation lever again.

  When the second ratchet mechanism that restricts the movement of the shaft regardless of the operation lever is provided as described above, the shaft of the second ratchet mechanism must be released in order to advance the shaft again. I must. Therefore, in the present invention, it is desirable to further provide a return lever that simultaneously releases the engagement between the rack and the ratchet in the first ratchet mechanism and the engagement between the rack and the ratchet in the second ratchet mechanism. If formed in this way, the restrictions on the two ratchet mechanisms can be released by a single operation of the return lever, and the work efficiency in the repair work can be improved.

  Further, it is desirable that the shaft is urged in a direction to advance by a spring or other elastic member at all times or in a retracted state. This is to enable the shaft to quickly return to the original position when the restrictions on the two ratchet mechanisms are released by operating the return lever.

  In the sheet metal drawing tool of the present invention, as described above, it is possible to adjust the drawer amount of the panel by the ratchet mechanism, but in the case of more reliably adjusting the drawer amount of the panel. It is desirable that a hole portion drilled in the axial direction is formed on the rear end side of the shaft, and a pull-out amount adjusting shaft for adjusting the retraction amount of the shaft is inserted into the hole portion. That is, a shaft that advances and retreats when the panel is pulled out is supported by a pulling amount adjusting shaft fixed to the frame, and its moving amount is adjusted. In particular, since the pull-out amount adjusting shaft is inserted into a hole portion drilled in the axial direction of the shaft, not only the retraction amount of the shaft but also the moving direction of the shaft can be regulated. Therefore, if it forms in this way, since the moving amount and moving direction of a shaft can be controlled with a single member, weight reduction of the drawing tool for sheet metal can be achieved.

  Further, in order to accurately adjust the drawer amount of the panel, in the sheet metal drawer according to the present invention, a scale portion along the shaft advancing / retreating direction is provided on the base frame, and a guideline for indexing the scale portion is provided in the drawer amount. It can be provided on the adjusting shaft. If formed in this way, the amount of movement of the pull-out amount adjusting shaft can be set more accurately, that is, the amount of movement of the shaft and hence the amount of pull-out of the panel can be set accurately.

  As described above, the sheet metal drawing tool according to the present invention includes the ratchet mechanism, the shaft drawing amount adjustment shaft, and / or the scale portion and the pointer, so that the depth of the dent measured prior to the drawing work can be reduced. It is a sheet metal drawing tool that can be used for drawing work by effectively utilizing the measurement results, and that can freely adjust the drawing amount of the vehicle body panel without troublesome operations.

  Therefore, by using the sheet metal drawing tool according to the present invention, the body panel can be repaired and the amount of the body panel can be adjusted without troublesome operations. In the case where the depth is measured, the amount of withdrawal corresponding to the depth can be adjusted by a simple method.

  Further, by using the ratchet mechanism, the force required for the drawing can be dispersed a plurality of times, so that the labor for the drawing work can be saved.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic view showing the internal structure of a sheet metal drawing tool 10 according to the present embodiment, FIG. 2 is an enlarged view of a main part showing a ratchet mechanism R, and FIG. 3 shows this sheet metal drawing tool 10. FIG. 4 is a schematic view showing a scale portion 23 for accurately adjusting the drawing amount, and FIG. 5 is a diagram showing damage to the vehicle body panel P using the sheet metal drawing tool 10. It is the schematic which shows the state which is repairing.

  First, the internal structure of the sheet metal drawing tool 10 according to the present embodiment will be described with reference to FIG. The drawing tool 10 for sheet metal shown in this figure is provided at a base frame 20 to which a seat 21 that contacts the sheet metal surface P is attached, a shaft 30 that is movable forward and backward with respect to the base frame 20, and a tip of the shaft 30. The welding tip 31 to be welded to the recess of the vehicle body panel P, the operation lever 40 for applying a force for moving the shaft 30 backward, and the shaft 30 being moved backward by the force applied to the operation lever 40. A ratchet mechanism R1, a pull-out amount adjusting shaft 50 for regulating the retraction amount of the shaft 30, and a second ratchet mechanism R2 for preventing the retraction of the retracted shaft 30 are configured.

  The welding tip 31 provided at the tip of the shaft 30 is supplied with electricity supplied to the joint with the shaft, and is electrically welded to the vehicle body panel P. On the other hand, a hole portion 32 formed in the axial direction is formed at the rear end of the shaft 30, and a drawing amount adjusting shaft 50 is inserted into the hole portion 32. As a result, the shaft 30 can move forward and backward along the pull-out amount adjusting shaft 50.

  The pull-out amount adjustment shaft 50 is screwed into a nut 22 attached to the base frame 20, and the rear end thereof is connected to the nut 22 so that the advancement / retraction with respect to the nut 22 can be operated from the outside of the base frame 20. An operation unit 51 of the pull-out amount adjusting shaft 50 is provided. With this operation portion 51, the pull-out amount adjustment shaft 50 can be rotated around the axis so that the insertion amount into the hole portion 32 can be adjusted.

  The rack 33 provided on the shaft 30 is engaged with a ratchet claw 41 that is energized by an elastic member 42 such as a spring, and this ratchet claw is swingable with respect to the base frame 20. The operating lever 40 that is pivotally or pivotally mounted on the rack is moved in the direction of the arrow in FIG. 1 to engage with the rack teeth 33 ′, and the shaft 30 is retracted as the operating lever 40 moves.

  Thus, in the sheet metal drawing tool 10 according to the present embodiment, the shaft 30 is retracted by the ratchet mechanism R. Therefore, by adjusting the return amount of the operation lever 40, the retract amount (that is, the panel surface P) (Drawing amount) can be adjusted accurately.

  That is, as shown in FIG. 2, when the distance that the shaft 30 moves by swinging the operating lever 40 once is (X), the ratchet pawl 41 is moved to the original position by returning the operating lever 40 to the original position. It moves by the number (Y) of rack teeth 33 ′ existing in the range of (X). Therefore, by calculating “distance (X) / number of rack teeth 33 ′ (Y)”, it is possible to calculate the retraction amount (drawing amount) per rack tooth. Therefore, when the operation lever 40 is returned, the operation lever 40 is returned by the number of rack teeth corresponding to the desired retraction amount (drawing amount), and the operation lever 40 is pulled again in the meshing direction of the ratchet pawl 41 to accurately The amount of drawer can be taken out. Note that the return number of the rack teeth 33 ′ when the drawer lever is returned can be specified by the feel and sound transmitted to the operation lever 40.

  In FIG. 2, if the movement distance (X) of the shaft 30 is 3 mm, the rack teeth 33 'are moved by three by one operation, so the movement distance per rack tooth is "3mm / 3". 1 mm. Therefore, when returning the operation lever 40, if the movement amount of the ratchet pawl 41 is set to two rack teeth, the shaft 30 can be retracted by 2 mm and the panel P can be pulled out by 2 mm by pulling the operation lever in the next operation. .

  The shaft 30 retracted by the operation of the first ratchet mechanism R1 is prevented from moving in the forward direction by the second ratchet mechanism R2, and its retracted position is maintained. Even when 40 is returned to the original position, the pull-out amount of the panel P can be maintained.

  In particular, as shown in this embodiment, the ratchet mechanism R is used for the backward movement of the shaft 30, and the second ratchet mechanism R for preventing the forward movement is further provided. The panel P can be pulled out in small increments. As a result, the panel P can be pulled out easily with a small gripping force, which conventionally required a large gripping force. Therefore, if the sheet metal drawing device according to the present invention is used, the body panel P can be pulled out even with a weak gripping force such as a woman.

  Then, after retracting the shaft 30 by the required amount and pulling out the panel P, the return lever 43 is operated (pulled) to simultaneously engage the rack 33 and the ratchet teeth in the first ratchet and the second ratchet mechanism R. release. By this release, the base frame 20 is pushed rearward by the elastic member 34 installed on the rear end side of the shaft 30, and the abutment seat 21 is separated from the sheet metal surface P. Therefore, the welding tip 31 joined to the panel P is shaken or turned to peel off the welding tip 31 from the panel P and weld to the next repair point.

  It should be noted that an electrical energization switch for joining the tip of the welding tip 31 to the panel surface P is preferably provided within a range that can be operated with the finger placed on the operation lever 40.

  Next, a repair method for adjusting the drawing amount of the panel P more accurately using the drawing amount adjusting shaft 50 and the scale portion 23 in the sheet metal drawing tool 10 will be described with reference to FIGS.

  First, in a state where the shaft 30 is positioned first, the welding tip 31 provided at the tip thereof is electrically welded to the panel P surface to be repaired (FIG. 3A). Next, the operation lever 40 is pulled to retract the position of the shaft 30 (relative to the base frame 20) until the abutment seat 21 contacts the panel P surface. At this time, when the vehicle body panel P is taken as a reference, the base frame 20 is advanced toward the vehicle body panel P (FIG. 5B). In this state, the pull-out amount adjusting shaft 50 is screwed in until it comes into contact with the bottom surface of the hole 32, and then retracted by an amount corresponding to the pull-out amount ((C) in the figure). As for the retraction amount of the pull-out amount adjusting shaft 50, it is desirable to adjust the width, angle, etc. of the screw groove provided in the pull-out amount adjusting shaft 50 so that, for example, the retraction amount adjusting shaft 50 retreats by 2 mm. Further, as shown in FIG. 4, the scale portion 23 along the shaft 30 advancing / retreating direction is provided on the base frame 20, and the pointer 52 indicating the scale portion 23 is moved together with the pull-out amount adjusting shaft 50 such as the operation portion 51. The pull-out amount adjusting shaft 50 can be moved backward based on the value of the scale portion 23 indicated by the pointer 52 provided at the location.

  Due to the retraction of the pull-out amount adjustment shaft 50, a space portion having a length corresponding to the retraction amount of the pull-out amount adjustment shaft 50 is generated between the tip of the pull-out amount adjustment shaft 50 and the bottom surface of the hole portion 32. Then, as shown in FIGS. 3D and 3E, the operating lever 40 is operated a plurality of times to move the shaft 30 in the rear end direction, and the recessed panel P surface is pulled out.

  When the initially planned withdrawal amount (that is, the amount by which the withdrawal amount adjustment shaft 50 is retracted) is pulled out, the bottom of the hole 32 at the rear end of the shaft 30 is pulled out as shown in FIG. Since it hits the tip of, it can prevent further withdrawal. Since the initially scheduled drawing operation is completed, the return lever 43 is pulled to disengage the first and second ratchets, and the abutment seat 21 is lifted from the panel P surface. Thereafter, the welding tip 31 is peeled off from the panel P surface and moved to the next drawing point, and the same operation is performed.

  This work state can be performed on a dent generated in the vehicle body panel P as shown in FIG.

  After pulling out the recessed panel surface P to some extent by the above operation, as with conventional repair methods, putty application / curing work, surfacer (primer surfacer) application / curing work, and polishing work as appropriate Finally, the top panel is painted and polished to complete the repair work on the body panel P.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

The schematic which shows the internal structure of the drawing tool for sheet metal concerning this Embodiment Enlarged view of main parts showing ratchet mechanism Schematic showing the drawing process using a sheet metal drawing tool Schematic diagram showing the scale for accurately adjusting the amount of drawer Schematic showing the state of repairing damage to the body panel using a sheet metal drawer

Explanation of symbols

10 Sheet metal drawer
20 base frame
21 Sagittarius
22 Nut
23 Scale
30 shaft
31 Welding tips
32 holes
33 racks
33 'rack teeth
40 Control lever
41 ratchet claws
42 Elastic member
43 Return lever
50 Drawer adjustment axis
51 Operation section
52 Guidelines
P body panel
R ratchet mechanism
R1 first ratchet mechanism
R2 second ratchet mechanism

Claims (9)

A sheet metal drawing tool for pulling out the sheet metal surface,
A base frame to which a seat to hit the sheet metal surface is attached;
A shaft provided so as to be movable back and forth with respect to the base frame, and provided with a connector with a sheet metal surface at the tip;
An operating lever as an operating part when the shaft is retracted;
A first ratchet mechanism for retracting the shaft according to the operation of the operation lever ;
In addition, a hole formed in the axial direction is formed on the rear end side of the shaft, and the panel withdrawal amount is set in the hole by adjusting the retraction amount of the shaft. It has been pulled out amount adjusting shaft is characterized that you have been inserted, sheet metal lead instrument.   2. The sheet metal drawer according to claim 1, wherein the first ratchet mechanism includes a rack provided on the shaft, and a ratchet claw that urges the rack in a retracting direction of the shaft by operation of an operation lever. .   The sheet metal drawing tool according to claim 1, further comprising a second ratchet mechanism that prevents the shaft retreated by the first ratchet mechanism from moving forward.   The return lever is further provided for simultaneously releasing the engagement between the rack and the ratchet in the first ratchet mechanism and the engagement between the rack and the ratchet in the second ratchet mechanism. Drawer tool for sheet metal. The withdrawal tool for sheet metal according to any one of claims 1 to 4, wherein the shaft in the retracted state is urged in an advancing direction by an elastic member. Further, the base frame is provided with a scale portion along the shaft advancing / retreating direction, and the pull-out amount adjustment shaft is provided with a pointer that moves together with the pull-out amount adjustment shaft and indicates the scale portion. The drawer tool for sheet metal according to any one of claims 1 to 5 . A sheet metal drawing tool for pulling out the sheet metal surface,
A base frame to which a seat to hit the sheet metal surface is attached;
A shaft that is provided so as to be able to advance and retreat with respect to the base frame, a connection tool with a sheet metal surface is provided at the front end, and a hole having a hole formed in the axial direction at the rear end;
An operation lever which is an operation unit when the shaft is retracted;
A first ratchet mechanism for retracting the shaft in response to an operation of the operation lever;
A second ratchet mechanism that prevents the forward movement of the shaft retracted by the first ratchet mechanism;
An elastic member that urges at least the retracted shaft in a forward direction; and
A drawing amount adjusting shaft fixed to the frame, which is inserted into a hole formed in the rear end side of the shaft and sets a drawing amount of the panel by adjusting a retraction amount of the shaft;
A scale portion provided in the base frame, along the shaft advancing / retreating direction,
A guide provided on the pull-out amount adjustment shaft, which moves together with the pull-out amount adjustment shaft, and indicates the scale portion;
A sheet metal drawer. A method of repairing a body panel for repairing a depression in a body panel,
The repair method includes a step of pulling out the recessed body panel with a sheet metal drawing tool,
A method for repairing a vehicle body panel, wherein the sheet metal drawing tool according to any one of claims 1 to 7 is used as the sheet metal drawing tool. A method of repairing a body panel for repairing a depression in a body panel,
The repair method includes a pulling-out step of pulling out the recessed body panel with the sheet metal drawing tool according to claim 7 ,
A step of welding a connector provided at the tip of the shaft biased in the forward direction by the elastic member to the sheet metal surface;
A step of operating the operating lever to retract the shaft and abut the seat against the sheet metal surface;
The pull-out amount adjusting shaft inserted into the hole formed in the rear end side of the shaft is pressed against the bottom surface of the hole, and the pull-out amount corresponding to the pull-out amount of the vehicle body panel is drawn based on the pointer indicating the scale portion. A step of retracting the amount adjusting shaft,
Repairing the vehicle body panel, comprising a step of operating the operating lever until the bottom surface of the hole formed in the rear end side of the shaft comes into contact with the tip of the retracted pull-out amount adjusting shaft to retract the shaft. Method.

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