JPH11267921A - Paint film peeling tool and paint film peeling method in precleaning of spot welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the paint or rust adhered to a necessary part in spot welding by providing a clamp part consisting of a pair of nipping jaws and a pair of peeling blades provided opposite to the nipping jaws. SOLUTION: A part to be spot-welded is predetermined in the state where plate materials are closely put one over another, and this part is nipped from both sides by a pair of nipping jaws consisting of an upper jaw 2 and a lower jaw 3. When the nipping is weak, a regulating bolt 12 is fastened to spirally advance the bolt 12 upward, whereby the plate materials are firmly nipped, and the blade surface of an upper peeling blade 5 and the blade surface of a lower peeling blade 6 are pressed to a desired position of the plate materials. By laterally rotating a peeling tool within the plane direction of the plate materials, the blade surfaces pressed to the paint film part of the plate materials are rotated in pressure contact to peel the paint film. This peeling work can be easily performed by holding a peeling handle 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint peeling tool, and more particularly, to a method of repairing a painted sheet metal part when it is damaged and performing spot welding thereafter.
The present invention relates to a tool for removing paint film and rust adhering to a painted surface, improving current flow during spot welding, and joining well.

[0002]

2. Description of the Related Art When a scratch occurs on a painted sheet metal part,
For example, when the body of the moving vehicle is damaged, the panel of the corresponding portion is removed from the body. Usually, the panel is formed by spot welding a plurality of (for example, two) plate members. It is configured. Accordingly, the plate material spot-welded is removed, and the damaged plate material is repaired. After the repair of the damaged plate is completed, spot welding is performed again to form the original panel. Spot welding is performed by a welding machine as shown in FIG. The plate materials A and B are closely adhered and polymerized, and spot welding is performed by sandwiching a desired portion of the plate material between tips (electrodes) b provided opposite to the tip of the arm a of the welding machine. Is performed at a predetermined pitch.

[0003] However, spot welding cannot be performed well if a coating film or rust is attached, and it is necessary to remove the coating film or rust during spot welding. In this case, it is necessary to match the front and back positions at a plurality of places of the superposed plate material, but such work is troublesome. Therefore, the coating film and rust are to be peeled off to a portion unnecessary for spot welding, and the operation is complicated and troublesome. In addition, in the case where a coating film at a portion unnecessary for spot welding is peeled off, work such as repainting or rust prevention is required at such a portion.

[0004]

SUMMARY OF THE INVENTION The present invention has been conceived from a completely new viewpoint to solve such a problem in the prior art, and is intended to remove paint or rust adhering to a necessary portion in spot welding. It is an object of the present invention to provide a tool for dropping and improving the current flow during spot welding and for performing spot welding satisfactorily.

[0005]

In order to achieve the above object, the present invention employs a coating film peeling tool comprising a pair of clamping jaws.
And a clamping portion comprising a pair of peeling blades provided in opposition to the holding jaw. When the desired portion of the plate material is held between the peeling blades, the desired portion is rubbed by the peeling blade. It is characterized in that the coating film and rust are removed.

[0006] In the coating film peeling method in the spot welding pretreatment using such a coating peeling tool, a plate material to be spot-welded is first prepared, and then a desired portion of the plate material is sandwiched between the peeling blades. A peeling blade is pressed against the desired part, and the peeling blade is rotated at the desired part while being pressed against the desired part, so that the peeling blade rubs the desired part to remove a coating film or rust. It is characterized by having done. The rotation of the peeling blade may be performed by rotating the tool in the surface direction of the plate material, or only the peeling blade may be rotated. As the rotation of the peeling blade only,
For example, it can be performed by using a motor or air.

Preferably, the coating film peeling tool is capable of holding a state in which the plate material is sandwiched. By doing this,
There is no need to maintain a state in which the blade surface of the peeling blade is in close contact with the plate material by the gripping by the operator's hand, and the turning operation of the peeling tool is saved.

Preferably, the holding jaw is a fixed jaw.
And the other holding jaw is a movable jaw, the fixed jaw is mounted on a grip handle, and the movable jaw moves in a direction approaching or separating from the fixed jaw on the grip handle. The movable jaw is rotatably mounted on the movable jaw, and a link is pivotally mounted between the grip handle and the grip lever. I do. Further, the position of one end of the link relative to the tool can be freely changed by the position adjusting means, and the distance between the opposing peeling blades can be freely adjusted by changing the position of one end of the link. .

Preferably, a peeling handle is provided on the coating film peeling tool so as to be rotatable in the longitudinal direction of the tool, and by holding the peeling handle and turning the tool in the plane direction of the plate material, It is preferable that the peeling blade scrapes off the coating film and rust. By providing the peeling handle rotatably in the length direction of the tool, the tool can be rotated in the surface direction of the plate material while the peeling handle is rotated to an arbitrary position. The performance is improved.

[0010]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a coating film peeling tool according to a first embodiment of the present invention, showing a state in which a distance between a pair of facing peeling blades is reduced, that is, a state in which the facing peeling blades are in contact. ing. The coating film peeling tool has a clamp portion 1, and the clamp portion 1 has an upper jaw.
A pair of clamping jaws 2 and a lower jaw 3, and an upper peeling blade 5 and a lower peeling blade 6 provided to face the upper jaw 2 and the lower jaw 3, respectively.

FIG. 2 is a view showing the upper jaw-2. The upper jaw-2 has a plate-like main body 2a having a vertically-long, substantially right-angled triangular shape in side view. A peeling blade mounting portion 2c is formed by horizontally extending an upper end portion of a vertical side portion 2b formed thicker than a portion, and a vertical mounting hole 2d is provided in the peeling blade mounting portion 2c. The upper peeling blade 5 is mounted. A boss 2g for attaching the paint peeling handle 7 is formed at a corner on the lower end side of the hypotenuse 2e, in other words, at an intersection of the hypotenuse 2e and the bottom 2f.

Further, a grip handle mounting portion 2h is formed by extending a lower corner portion of the hypotenuse portion 2e downward, and a perforation 2i for mounting the grip handle 8 is formed in the grip handle mounting portion 2h. And is attached to the upper end side of the grip handle 8 by rivets. Upper Joe-2
The vertical side portion 2b having a large thickness forms a columnar portion extending in the vertical direction, and has a role of a guide portion when the lower jaw-3 moves up and down.

FIG. 2D is a partial side view and a sectional view showing another embodiment of the vertical side 2b.
b is formed as a guide portion 20a, and an upper half portion is formed on an inclined surface 20b (see a sectional view).
b is located at a position corresponding to the plate material to be clamped, so that the turning range of the tool when the plate material is clamped can be made large.

FIG. 3 is a view showing the lower jaw-3. The lower jaw-3 is a plate-shaped main body 3a, and a rising portion formed by extending the upper end of the main body 3a upward in a rising shape. 3b
And a peeling blade mounting portion 3c formed horizontally at the upper end of the rising portion 3b, and a vertically extending mounting hole 3d is provided in an extending portion on one end side of the peeling blade mounting portion 3c. 6 is formed, and a guide groove 3e for receiving the vertical side 2b of the upper jaw 2 is formed in the extension on the other end side of the peeling blade mounting portion 3c.

The lower jaw main body 3a is provided with a vertically long slot 3f close to the end on which the guide groove 3c is formed, and the upper end of the grip handle 8 is formed by a rivet provided in the long slot 3f. It is installed. One end of a tension coil spring 9 is fixed to the center of the bottom of the lower jaw body, and the other end of the tension coil spring 9 is fixed to the grip handle 8. Therefore, lower jo-3
Is vertically movable within the length of the long groove 3 f with respect to the grip handle 8, and is normally urged downward by the tension coil spring 9. A grip lever is provided at the corner of the lower jaw body 3a on the side remote from the grip handle 8.
The upper end of 10 is pivotably connected to the upper end.

FIG. 4 shows the grip handle 8,
The grip handle 8 is formed of a long member extending in the vertical direction, and has a substantially U-shape or a U-shape in cross-sectional view. The coil spring 9 and the link 11 can be received. The opening width of the opening is a wide portion 8d at an intermediate portion in the length direction, and a lower portion of the wide portion 8d is a narrow portion 8e. Holes 8a and 8b are juxtaposed on the upper end side of the grip handle 8. The holes 2i of the upper jaw 2 and the long grooves 3f of the lower jaw 3 are respectively aligned and passed through the rivets 4a and 4b, whereby the upper jaw is formed. -2, the lower end of the lower jaw-3 is connected to the upper end of the grip handle 2; The inside of the grip handle 8 is hollow, and a lower end portion is formed with a female screw portion 8c which receives an adjustment bolt 12 to be described later in a vertically movable and screwable manner.

FIG. 5 shows the grip lever 10, FIG. 6 (A) shows the release lever 13, and FIG. 6 (B) shows the link 11, wherein a perforation 10a is provided at the upper end of the grip lever 10. The rivet 4c pivotally attaches to the lower end of the lower jaw-3. A hole 10b is formed slightly above the intermediate portion in the length direction of the grip lever 10, while a hole 11a is formed at one end of the link 11, and one end of the link 11 is gripped by the rivet 4d. The lever 10 is rotatably connected to the lever 10. The other end of the link 11 extends into the opening of the grip handle 8, and is rotatably mounted on the end of the leg 12 a of the adjustment bolt 12. A projection 11b is formed on the side of the other end of the link 11, so that the link 11 does not come off from the narrow portion 8e of the opening of the grip handle 8. The tool is kept in the state shown in FIG. 1 by exceeding the dead center of the tension spring 9 and the link mechanism, and therefore, can hold the state in which the plate material is sandwiched.

A perforation 10c is provided below the perforation 10b provided on the grip lever 10, and an upper end of the release lever 13 is rotatably mounted via a pin 14a. The pin 14a is provided with a torsion spring 15, which urges the release lever 13 in a direction away from the grip handle 8. The release lever 13 is configured to abut and overlap the gripping lever 10 from the inside.
The grip lever 10 is urged in a direction away from the grip handle 8 through the lever. Therefore, when the upper jaw 2 and the lower jaw 3 are closed as shown in FIG. 1, a slight force is applied to the release lever 13 in a direction away from the grip handle 8 to easily expand the grip lever 10. , And the distance between the peeling blades 5 and 6 provided on the upper jaw-2 and the lower jaw-3 is increased.

FIG. 7A shows an upper peeling blade 5.
The upper peeling blade 5 is a short columnar member having a circular cross section,
The lower end surface is formed with a jagged blade surface 5a in a side view. FIG. 7B shows the lower peeling blade 6, which is a columnar member having a circular shape in cross section, and a blade surface 6 a is formed on the upper end surface. The blade surface 5a at the lower end of the upper peeling blade 5 and the blade surface 6a at the upper end of the lower peeling blade 6 face each other, and a plate material is sandwiched between both blade surfaces. In the embodiment, the area of the blade surface 5a is larger than the area of the blade surface 6a. The shapes of the blade surfaces 5a and 6a are not limited to those shown, but in the case of a jagged blade surface, since the blade surface rotates in a state of being pressed against the plate surface,
It is possible to satisfactorily remove coatings and the like. In addition, blade surface 5
It is desirable that the areas a and 6a have a size corresponding to the exposed area of the plate material required for spot welding.
The peeling blades 5 and 6 may be formed integrally with the jaws -2 and 3.
Alternatively, the peeling blades 5 and 6 may be provided rotatably with respect to the jaws 2 and 3, and only the peeling blades 5 and 6 may be rotated using a motor or air.

FIG. 8 shows the peeling handle 7. The peeling handle 7 is a circular handle having a circular shape in cross section, and has a substantially U shape. The peeling handle 7 has a pin 14b on the boss 2g of the upper jaw 2 at the opening end 7a.
It is mounted so that it can rotate freely. Peeling handle 7
The opening 7b has a dimension such that when the peeling handle 7 is turned up and down, it does not hinder the turning by receiving a tool (in FIG. 1, the middle part in the length direction is omitted. However, the peeling handle 7 can rotate once with the boss 2g of the upper jaw 2 as a pivot point. The part where the peeling handle 7 is provided is located on the upper jaw-2.
However, the present invention is not limited to this, and the peeling handle 7 may be provided detachably with respect to the tool body.

FIG. 9A shows a normal state of the paint peeling tool, in which the peeling blades 5 and 6 are separated from each other and the blade surfaces 5a and 6
FIG. 9B shows a state in which the distance between the grip handle 8 and the grip lever 10 is narrowed from the state of FIG. 9A, and corresponds to FIG. Is what you do. The shapes of the jaws 2 and 3 and the peeling blades 5 and 6 of the paint peeling tool shown in FIGS. 9 and 10 are slightly different from those shown in FIG. Not.

The operation and action of the coating film peeling tool thus configured will be described. Grip handle 8 and grip lever
When the grip lever 10 is gripped and the grip lever 10 is moved closer to the grip handle 8 side, the lower jaw 3 moves upward via the link mechanism against the urging force of the extension coil spring 9. More specifically, the lower jaw-3 is pushed upward through the lever 10 by the link 11,
The lower jaw-3 rises along the long groove 3f, and at this time, the guide groove 3f of the lower jaw-3 rises along the guide portion of the upper jaw-2.

When the lower jaw-3 is moved upward, the blade surface 6 at the upper end of the lower peeling blade 6 provided on the lower jaw-3
a is the blade surface 5 at the lower end of the upper peeling blade 5 provided on the upper jaw-2.
Go close to a. When the spring 9 moves beyond the dead center, the tool maintains the state shown in FIG. 9B. The ends of the legs 12a of the adjustment bolt 12, ie, the upper ends, are in contact with the other end of the link 11 from below, and the adjustment bolt 12 is screwed up and down via a bolt head 12b forming a knob. The relative position of the link 11 with respect to the grip handle 8 can be changed by retreating, so that the moving distance of the lower jaw-3, that is, the blade surface 5a of the upper peeling blade 5 and the blade surface 6 of the lower peeling blade 6 can be changed.
The distance from a can be adjusted.

A method of peeling a coating film at a site required for spot welding using the coating film peeling tool having the above-described configuration will be described with reference to FIG. A spot to be spot-welded in a state where the plate materials A and B are in close contact with each other is determined in advance, and such a spot is clamped from both sides by a pair of clamping jaws including an upper jaw-2 and a lower jaw-3. At this time, if the clamping is weak, the adjusting bolts 12 are tightened and the bolts 12 are screwed upward to firmly clamp the plate materials A and B, and the blade surface 5a of the upper peeling blade 5 and the lower peeling blade 6 The blade surface 6a is pressed against desired portions of the plate materials A and B.

In this state, by rotating the peeling tool left and right in the plane direction of the plate materials A and B, the blade surfaces 5a and 6a pressed against the coating portions of the plate materials A and B rotate while being pressed. To peel off the coating. This peeling operation can be performed more easily by holding the peeling handle 7. In particular, since the peeling handle 7 is rotatable in the vertical direction with respect to the peeling tool, the peeling handle 7 can be rotated to a convenient position, and the peeling handle 7 can be turned right and left or swung at that position. Although FIG. 10 shows a case where two plates are closely polymerized, the number of plates is not limited to this, and may be three or four.

The coating film peeling tool shown in FIGS.
A pair of peeling blades 5 and 6 opposed to each other by widening and narrowing a gap between the gripping handle 8 and the gripping lever 10. Match. By doing so, it is possible to hold the plate material while holding the paint peeling tool in an upright shape,
For example, L like front fender and inner fender
It is easy to pinch a part having a complicated shape such as spot welding of a character-shaped part, and at the same time, it is possible to easily perform a rotation operation of the tool.

FIG. 11 shows a coating film peeling tool according to the second embodiment, and its basic configuration is the same as that of the first embodiment. The coating film peeling tool is a pair of clamping jaws.
It has a clamp portion 1 composed of a pair of peeling blades 5 and 6 provided opposite to the distal ends of the holding jaws 2 and 3 and the holding jaws 2 and 3. One clamping jaw-2 is a fixed jaw and the other clamping jaw-3 is a movable jaw, each having a substantially C shape. The base end of the fixed jaw is integrated with the grip handle 8 by welding, and the base end of the movable jaw is pivotally attached to the grip handle 8. A grip lever 10 is rotatably attached to the movable jaw, and a link 1 is provided between the grip handle 8 and the grip lever 10.
1 is provided rotatably. A spring 9 is provided between the movable jaw and the grip handle 8 to bias the movable jaw in the expanding direction. An adjusting bolt 12 is screwed into the lower end of the grip handle 8, and the tip of the bolt shaft is configured to contact the end of the link 11.

[0028]

According to the present invention, it is possible to remove the paint film and rust adhering only to the necessary portions in spot welding, improve the current flow during spot welding, and perform good spot joining. .

[Brief description of the drawings]

FIG. 1 is a view showing a coating film peeling tool according to the present invention.

FIGS. 2A, 2B and 2C are a front view, a side view and a plan view of an upper jaw in FIG. 1, and FIG. 2D shows an upper jaw according to another embodiment. FIG.

FIGS. 3 (a), 3 (b) and 3 (c) are a plan view, a front view and a side view of a lower jaw in FIG.

FIGS. 4 (a), (b), and (c) are a side view, a plan view, and a front view of the grip handle in FIG.

FIG. 5 is a view showing a grip lever in FIG. 1;

FIG. 6A is a view showing a release lever in FIG. 1; (B) It is a figure showing the link in FIG.

FIG. 7A is a diagram showing an upper peeling blade in FIG. 1; FIG. 2B is a diagram illustrating a lower peeling blade in FIG. 1.

FIG. 8 is a view showing the peeling handle in FIG. 1;

FIG. 9A is a diagram illustrating a state where the clamp unit is open, and FIG. 9B is a diagram illustrating a state where the clamp unit is closed.

FIG. 10 is a diagram showing a use state of the coating film peeling tool according to the present invention.

FIG. 11 is a view showing a paint film peeling tool according to another embodiment of the present invention.

12A is a perspective view of a welding machine that performs spot welding, and FIG. 12B is an enlarged view of a spot weld.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp part 2 Upper jaw 3 Lower jaw 5 Upper exfoliation blade 6 Lower exfoliation blade 7 Handle for paint film exfoliation 8 Grip handle 10 Grip lever A Plate material B Plate material

Claims (9)

[Claims] A clamping portion comprising a pair of clamping jaws and a pair of peeling blades provided opposite to the clamping jaws, wherein a desired portion of a plate material is clamped between the peeling blades; A coating film peeling tool wherein the desired portion is rubbed by the peeling blade to remove a coating film, rust, and the like. 2. The coating film peeling tool according to claim 1, wherein said coating film peeling tool is capable of holding a state in which a plate material is sandwiched. 3. The coating film peeling tool according to claim 1, wherein one of the holding jaws is a fixed jaw and the other holding jaw is a movable jaw. 4. The fixed jaw is mounted on a grip handle, and the movable jaw is mounted on the grip handle so as to be movable toward and away from the fixed jaw. 4. A coating film according to claim 3, wherein a gripping lever is rotatably mounted on the gripper, and a link is rotatably provided between the gripping handle and the gripping lever. Peeling tool. 5. A coating film peeling tool according to claim 3, wherein said movable jaw is urged in a direction away from said fixed jaw. 6. The position of the pivot point between the link and the grip handle relative to the tool can be freely changed by position adjusting means, and the movable jaw can be changed by changing the position of the pivot point. The coating film peeling tool according to any one of claims 4 and 5, wherein the distance between the peeling blades is adjusted by moving the tool. 7. The position adjusting means is a bolt, and the bolt is screwed to the other end of the grip handle so that the tip of the bolt shaft contacts the end of the link. 7. The coating film peeling tool according to claim 6, wherein: 8. A peeling handle is provided on the coating film peeling tool so as to be rotatable in a longitudinal direction of the tool, and by holding the peeling handle and turning the tool in a plane direction of a plate material, the peeling handle is provided. The paint peeling tool according to any one of claims 1 to 7, wherein the peeling blade scrapes off a paint film, rust or the like. 9. A coating film peeling method in spot welding pretreatment using a tool having a clamp portion comprising a pair of clamping jaws and a pair of peeling blades provided opposite to the clamping jaws. a) polymerizing at least two or more plate materials to be spot-welded; (b) holding a desired portion of the polymerized plate material between the peeling blades, and pressing the peeling blade against the desired portion; The coating in the spot welding pretreatment, wherein the peeling blade is rotated at the desired portion while being pressed against the desired portion, and the peeling blade rubs the desired portion to remove paint, rust and the like. Film stripping method.