JPH07303920A - Pulling tool for sheet - Google Patents

Abstract

PURPOSE:To provide a sheet pulling tool which enables a sheet metal operation to be performed quickly and surely without requiring skillfulness and which also enables a sheet surface to be smoothed and the handle width of an operating means to be adjusted to the width suitable for an operator. CONSTITUTION:The tool is provided with a first operating means 10 equipped at the tip end with a bit 15 capable of welding on a sheet surface, a second operating means 20 which is equipped with a supporting part 50 for supporting freely rotatably the first operating means 10 and which is capable of pulling up and activating the first operating means 10 through a manual operation, and a leg body 90 for supporting the second operating means 20. The second operating means 20 is constituted of a main lever 30, second lever 40, and connecting arm 60 for connecting the two levers 30, 40. A means 80 for adjusting the handle width of these levers 30, 40 is arranged between the connecting arm 60 and the second lever 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet metal drawing tool, and more particularly to a sheet metal drawing tool capable of performing drawing work while applying a delicate force to the tip of a bit welded to a sheet metal surface.

[0002]

2. Description of the Related Art Conventionally, a welded metal fitting 500 (FIG. 17) is used as a drawing tool for sheet metal, which is convenient for pulling out a recess to be pulled out at the time of sheet metal via the metal fitting welded to the recess.
And FIG. 18), a slide hammer type sheet metal drawing tool which is hooked at one end and pulled out by a shock, and a sheet metal drawing tool of Japanese Utility Model Publication No. 62-27290 proposed by the applicant of the present application are known.

[0003]

In the former of those described in the prior art, the metal fittings are easily disengaged from the welded portion due to a shock at the time of impact; There were problems such as uneven undulations on the subsequent drawing surface; it was difficult to adjust the force applied during drawing, and there was a tendency to draw too much; it was difficult to perform smooth drawing in a short time.

In the latter case, the drawing force is transmitted to the sheet metal surface through the metal fitting 500 (see FIGS. 17 and 18) welded to the sheet metal surface, which is extremely convenient for roughing work for drawing out a relatively wide area at once. However, if it is necessary to pull out more details after that, if the sheet metal surface is a small area recess, or if the pulling out place is a very special place, it is possible to pull it out while applying a delicate (subtle) force. Was not always suitable.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sheet metal drawing tool which can perform sheet metal work quickly and surely without requiring skill and can easily achieve smoothing of the sheet metal surface.

Another object of the present invention is to require further drawing of details after finishing roughing work, where the drawing-out place is a relatively small area recess, or where the drawing-out place is a very special place. In this case, an object is to provide a sheet metal drawer that is convenient for pulling out the sheet metal surface.

Another object of the present invention is to set a drawer amount optimal for the condition of the concave portion of the sheet metal surface in advance, and to allow the operator to perform sheet metal work while visually confirming the pulled-out state. To provide the ingredients.

Another object of the present invention is to provide a sheet metal drawing tool which causes less metal fatigue in a place where a sheet metal is required.

Still another object of the present invention is to provide a sheet metal drawer having a gripping width adjusting means for adjusting the gripping width of the main lever and the second lever constituting the operating means to a gripping width suitable for an operator. To provide.

[0010]

According to a first aspect of the present invention, there is provided a shaft having a threaded portion, a handle for rotating the shaft provided at one end of the shaft, and a shaft distal end portion. A first operating means provided with a bit that can be welded to a sheet metal surface, and a supporting portion for screwing a screw portion of a shaft of the first operating means to rotatably support the first operating means. It further comprises a second operating means for pulling up the first operating means by a manual operation, and a leg body for supporting the second operating means, wherein the second operating means comprises a main lever and a second lever. And a connecting arm for connecting the main lever and the second lever, and a gripping width adjusting means for adjusting a gripping width between the main lever and the second lever is provided between the connecting arm and the second lever. Arranged, in front The compression coil spring to the shaft by interposing a wound vital this compression coil spring between said main lever and second lever to urge said second lever,
A sheet metal drawer for pulling out a sheet metal surface by pulling up the second lever while resisting the compression coil spring.

In the invention according to claim 2 of the present application, the grip width adjusting means comprises a screw hole provided in the connecting arm and a bolt screwed into the screw hole and having one end abutting against the second lever. It is a drawn-out tool for sheet metal.

The invention according to claim 3 of the present application is the drawing tool for sheet metal, wherein the main lever is provided with a stopper for restricting the movement of the second lever.

In the invention according to claim 4 of the present application, the stopper is composed of a screw hole provided in the main lever and a bolt which is screwed into the screw hole and one end of which is brought into contact with the second lever. It is a drawer for sheet metal.

[0014]

[Operation] If the degree of advance (deepness) in the screwing of the bolts that make up the gripping width adjustment means is adjusted, the gripping width (span) between the main lever and the second lever that makes up the operating means will become a gripping width suitable for the operator. Adjusted.

The tip of the bit is welded to the sheet metal surface, and the second operating means is grasped by hand to raise and move the second lever against the compression coil spring. The sheet metal surface is slowly pulled up and smoothed. Then, it is confirmed that the sheet metal surface is smoothed, and when the handle is rotated, the welding between the tip of the bit and the sheet metal surface is released.

The stopper comes into contact with the upper surface of the second lever when the second lever is manually pulled up, and restricts the second lever from moving upward more than necessary.

[0017]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a perspective view showing a sheet metal drawing tool of the present invention, and FIG. 2 is a perspective view showing a state in which a clamp means at one end of a power cord (output code of a welding machine) is attached to a cord connecting portion of the sheet metal drawing tool. 3 is a side view of the drawing tool for sheet metal, FIG. 4 is a front view of the drawing tool for sheet metal, and FIG. 5 is an exploded perspective view showing each component of the drawing tool for sheet metal.

In these drawings, the drawing tool 1 for sheet metal is shown.
Is provided with a first operating means 10 having a tip 15 having a bit 15 that can be welded to a sheet metal surface, and a supporting portion 50 that rotatably supports the first operating means 10, and the first operating means 10 is manually operated.
The second operating means 20 for pulling up the operating means 10 and the leg body 90 for supporting the second operating means 20 are provided.

Of these, the first operating means 10 is provided with a shaft 12 and a handle 11 for rotating the shaft provided at one end of the shaft 12, and the bit 15 is arranged at the tip of the shaft 12. Has been done. That is, the one end portion 12A of the shaft 12 constituting the first operating means 10 is screwed into the screw hole of the cord connecting portion 11B formed continuously with the handle 11, while the shaft 1 is
The front end portion 12B of the second screw 12 is screwed into the screw hole provided at the base end portion of the bit 15. Further, a screw portion 13 is engraved from the substantially central portion of the shaft 12 to the base end portion, and the screw portion 13 is screwed into a support portion 50 of a second operating means 20 described later, and the first operating means 10 is provided. Is rotatably supported by the second operating means 20. A compression coil spring 14 is wound around the shaft 12. Further, the grip portion 11A of the handle 11 is covered with an insulating member.

The second operating means 20 includes a main lever 30, a second lever 40, and the main lever 30.
And a connecting arm 60 for connecting the second lever 40.

The main lever 30 has a handle portion 31 formed by covering an insulating member, and a pair of left and right arm rods extending in a direction orthogonal to the arrangement direction of the handle portion 31 and supported by the legs 90. 33A and 33B, a through hole 34 (see FIG. 5) for guiding the shaft, through which the shaft 12 is inserted, formed by piercing the central portion of the arm rod, and a groove portion projecting outward from the central portion of the arm rod. It is provided with a pair of left and right protrusions 35A and 35B formed with 35C.

On the other hand, the second lever 40 has a handle portion 4 formed by covering an insulating member like the handle portion 31.
1, a support portion 50 that is disposed in the hollow portion 42 formed on the tip end side of the handle portion 41 and supports the first operating means 10, and a center portion that projects outward from the side end surface 43 of the handle portion 41. A pair of left and right protrusions 4 formed with a groove portion 44C in the
4A and 44B are provided. The support portion 50 is configured by accommodating a support member 51 having a female screw portion formed in a central through hole 52 in the hollow portion 42 and fixing the support member 51 to the second lever 40 with screws 48 and 49. Thus, the through hole 52 of the support member 51 and the threaded portion 1 of the shaft 12
3, the first operating means 10 is rotatably supported by the second operating means 20.

Further, bolt insertion holes 61 and 62 are formed on the upper side and the lower side of the connecting arm 60. On the upper side of the connecting arm 60, the upper arm portion of the connecting arm 60 is inserted into the groove portion 35C of the main lever 30, and the bolt 37 is inserted into the bolt insertion holes 35D and 61.
Fixed in. On the other hand, on the lower side of the connecting arm 60, the lower arm portion of the connecting arm 60 is inserted into the groove portion 44C of the second lever 40 so that the bolt inserting holes 44D and 62 are inserted.
The bolt 46 is inserted through and is attached with the nut 38.

Thus, the main lever 30 and the second lever 40 are connected via the connecting arm 60. In this case, the second lever 40 has the bolt 46 inserted in the bolt insertion hole 62 of the connecting arm 60.
Is used as a short axis and is pivotally supported by the connecting arm 60. Further, since the compression coil spring 14 is interposed between the main lever 30 and the top surfaces of the support portions 50 in a state in which the shaft 12 is wound, the second lever 40 moves downward in FIGS. 1 to 3. Always urged.

Reference numeral 70 indicates the second lever 4 when the second lever 40 is manually pulled up.
It is a stopper that comes into contact with the upper surface of No. 0 and restricts the second lever 40 from moving upward more than necessary. The stopper 70 is screwed into the screw hole 36 provided in the vicinity of the handle portion 31 of the main lever 30, and the bolt 70A is screwed into the screw hole 36 and one end of which is in contact with the second lever 40.
It consists of Coil spring 7 is attached to this bolt 70A.
The bolt 70 </ b> A is screwed into the screw hole 36 of the main lever 30 in a state in which 1 is wound.

Reference numeral 80 is a gripping width adjusting means arranged between the connecting arm 60 and the second lever 40 for adjusting the gripping width between the main lever 30 and the second lever 40. The grip width adjusting means 80 is composed of a screw hole 63 provided in a lower portion of the connecting arm 60 and a bolt 80A screwed into the screw hole 63 and one end of which is brought into contact with the second lever 40. With the coil spring 81 wound around the bolt 80A, the bolt 8
0A is screwed into the screw hole 63 of the connecting arm 60, and the tip of the bolt 80A is brought into contact with the side end surface 43 of the second lever 40. Bolt 80A for adjusting the grip width
The gripping width L between the main lever 30 and the second lever 40 can be adjusted by adjusting the degree of advancement (depth) of the screw
(Span L; see FIG. 3) is adjusted to a grip width suitable for the operator.

The leg body 90 includes a contact surface member 93, a pair of left and right leg portions 91 and 92 standing on the contact surface member, and a dish-shaped cushion that surrounds the contact surface member 93. 9
8 and includes the contact surface member 93 and the cushion 98.
And form a contact surface portion 99 that comes into contact with the sheet metal surface. Guide grooves 94 and 95 are formed in the upper portions of the legs 91 and 92, and the arm rods 33A and 33B of the main lever 30 are inserted into the guide grooves 94 and 95 and fixed with screws 96 and 97. .

The present invention is constructed as described above, and the power cord 10 is connected to the cord connecting portion 11B of the sheet metal drawing tool 1.
0 clamp means is attached, and the other end of the power cord 100 is connected to a welding machine (not shown) for use (see FIG. 2). As shown in FIG. 8, the power cord 100 includes a main clamp 101, a second clamp 102, and a shaft 10.
3, the spring 104, the terminal cord 105, the pipe 106, and the screws 107 and 108 are assembled.

(Method of Using Sheet Metal Drawing Tool) Here, a method of using the sheet metal drawing tool 1 according to the present invention will be described. First, the bolt 70A of the stopper 70 and the gripping width adjusting means 8
The depth of the screwed state of the 0 bolt 80A is adjusted, and the grip width L between the main lever 30 and the second lever 40 is set to the optimum state for the operator. Next, the handle 11 is rotated, and the tip of the bit 15 is lowered until the depth of the recess that needs to be pulled out (for example, the depth M in FIG. 4) is reached. Then, the tip 15A of the bit is welded to the recess. Next, the second operating means 20 is gripped by the hand, and the second lever 40 is pulled up and moved against the compression coil spring 14 to slowly pull up the concave portion. After confirming that the sheet metal surface has been smoothed, the handle 11 is rotated to release the welding between the tip of the bit and the sheet metal surface (FIGS. 12, 13, and 1).
4).

By combining the sheet metal drawing tool 1 according to the present invention with a stud welding machine having an automatic welding function, welding and drawing of bits can be continuously performed. Therefore, for example, when the work surface of the sheet metal is the body of the automobile, it is possible to pull out any place (each portion shown in 401 to 412 of FIGS. 15 and 16). That is, the fenders, which have a relatively large number of opportunities for repair, can be quickly and cleanly repaired (location 401 in FIG. 15); the hard-to-repair flat parts such as the hood can also be repaired cleanly (location 402 in FIG. 15); The place can also be fixed without burning (403 in FIG. 15); the hard steps can be smoothed by using after roughing out (404 in FIG. 15); Do not hit from the inside when putting out the door line It can be fixed without removing the inner lining (405 in Fig. 15); It is easy to fix a bag-shaped and rigid fender arch (406 in Fig. 15); 15) 407); The cab type front panel can be fixed without removing interior parts such as the dashboard (408 in FIG. 16); Work is also comfortably performed ((409 in FIG. 16); the other, it is possible to fix as well the location of the code 410 to 412 in FIG. 16;

In the above embodiment, the contact surface member and the cushion of the leg are formed in a square shape, but a round contact surface member 193 and a cushion 198 may be used as shown in FIG. Further, as shown in FIG. 10, the leg portions 291 and 292 of the leg body 290 are made independent, and the contact surface members 293A and 2
93B is formed on a straight line, and the cushions 298A and 298 are formed.
Of course, B may be formed similarly. When the legs shown in FIG. 10 are used, the positions of the left and right legs can be moved and used as shown in FIG.

[0032]

The present invention is configured as described above, and the present invention has the following effects. Since the work of drawing the sheet metal surface can be performed by a series of operations such as welding, pulling up, and removal of the bit, the sheet metal work can be performed quickly, reliably and efficiently without requiring skill, and the sheet metal surface can be smoothed easily. Can be achieved. In addition, by manually operating the second operating means with the tip of the bit provided at the tip of the shaft welded to the sheet metal surface, a pull-out portion (for example, a recess in a small portion or a relatively small area or a special place) It is possible to pull out while applying delicate power to. Further, the first operating means is rotatably supported on the supporting portion of the second operating means, and the handle of the first operating means is rotated to raise and lower the bit, thereby making the depth of the concave portion of the sheet metal surface. Depending on the configuration, the bit position can be adjusted freely,
You can preset the optimal drawer adjustment in front of the sheet metal,
The sheet metal work can be performed extremely accurately. Moreover,
When the operator manually operates the second operation means, it is possible to perform the sheet metal work while visually confirming, and the operation is easy. Then, when the bit is welded to the sheet metal surface, weak welding is sufficient, and when the bit is welded, there is almost no sticking to the back surface of the sheet metal surface, and since the recess for performing the sheet metal can be slowly pulled out, metal fatigue at the sheet metal portion is small.
In addition, a gripping width adjusting means composed of a screw hole provided in the connecting arm and a bolt screwed into the screw hole and having one end abutting against the second lever is provided between the connecting arm and the second lever. Since it has been done, by adjusting the degree of advancement (depth) of the screw for adjusting the grip width,
Even if the grip width (span) between the main lever and the second lever that constitutes the operating means is set in advance or during work,
It is possible to adjust the grip width suitable for the operator.

[Brief description of drawings]

FIG. 1 is a perspective view showing a sheet metal drawer according to the present invention.

FIG. 2 is a perspective view showing a state where a power cord clamp means is attached to a sheet metal drawer.

FIG. 3 is a side view of a sheet metal drawer.

FIG. 4 is a front view of a sheet metal drawer.

FIG. 5 is an exploded perspective view showing each component of the sheet metal drawer.

FIG. 6 is a front view of a bit constituting the sheet metal drawer according to the present invention.

FIG. 7 is a bottom view of a bit which constitutes the sheet metal drawer according to the present invention.

FIG. 8 is an exploded perspective view showing each component of the power cord clamping means attached to the sheet metal drawer.

FIG. 9 is a perspective view showing another example of legs constituting the sheet metal drawer according to the present invention.

FIG. 10 is a perspective view showing another example of legs constituting the drawer for sheet metal according to the present invention.

FIG. 11 is a front view showing a usage state of the sheet metal drawer.

FIG. 12 is a front view of the bit when the bit is welded.

FIG. 13 is a front view showing the tip of the bit when the bit is welded.

FIG. 14 is a bit front view showing each state of welding, pulling up, and detaching the bit at the time of sheet metal working.

FIG. 15 is a perspective view showing an automobile body.

FIG. 16 is a perspective view showing another vehicle body.

FIG. 17 is a front view showing a state of a metal fitting used when a conventional sheet metal drawer is used in sheet metal working.

FIG. 18 is a front view showing a tip of a metal fitting when a metal fitting used in the case of using a conventional sheet metal drawer is welded to a sheet metal surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet metal drawer 10 1st operation means 11 Handle 12 Shaft 13 Screw part 14 Compression coil spring 15 Bit 20 2nd operation means 30 Main lever 40 Second lever 50 Support part 60 Connecting arm 70 Stopper 80 Grip width adjustment means 90 Leg 99 Contact surface 190 Leg 290 Leg

Claims (4)

[Claims] 1. A shaft comprising a threaded portion, a handle for rotating the shaft provided at one end of the shaft, and a bit provided at the tip of the shaft and weldable to a sheet metal surface. And the threaded portion of the shaft of the first operating means are screwed together to form the first operating means.
A second supporting means for rotatably supporting the operating means, a second operating means for pulling up the first operating means by a manual operation, and a leg body for supporting the second operating means, The second operating means includes a main lever, a second lever, and a connecting arm that connects the main lever and the second lever, and the main lever and the second lever are provided between the connecting arm and the second lever. Grip width adjusting means for adjusting the grip width with the lever is provided, a compression coil spring is wound around the shaft, and the compression coil spring is interposed between the main lever and the second lever to urge the second lever. The sheet metal drawer is characterized in that the second lever is pulled up against the compression coil spring to pull out the sheet metal surface. 2. The grip width adjusting means comprises a screw hole provided in the connecting arm and a bolt screwed into the screw hole and having one end abutting against the second lever. Drawer for sheet metal. 3. The main lever is provided with a stopper for restricting movement of the second lever.
Drawer for sheet metal described. 4. The drawer for sheet metal according to claim 3, wherein the stopper is composed of a screw hole provided in the main lever and a bolt screwed into the screw hole and having one end abutting the second lever. Ingredient