JPS61132223A - Tool - Google Patents

Abstract

PURPOSE:To improve the operating efficiency by providing the 1st and 2nd holders, used for attaching and detaching a stud to one end of a mandrel as well as attaching a grip to the other end and further fastening both holders through a chuck. CONSTITUTION:The 1st holder 5 made of brass is screwed in one end of a mandrel 2 and the 2nd holder 9 is provided to the notch 6 of holder 5. A grip 13 is attached in one body to the other end of mandrel 2 through an external thread 3. Further, a chuck 11 is screwed in the 1st holder 5 through an external thread 4 to bring it into contact with the taper surfaces 5a, 9a of holders 5, 9. A stud 8 is inserted between the holders 5, 9 and is locked by rotating the chuck 11. Next, the stud 8 is welded to a thin sheet to reform the sheet by the grip 13, and the welded part of stud 8 is wrenched off. Accordingly, the operation is managed by only one tool, and the operating efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tool used for smoothing out dents in thin metal plates such as steel plates for automobiles.

[Prior art]

Conventional such tools include stripes, e.g.
There is something like the one shown in the figure.

That is, a holder 10j made of aluminum is inserted and connected to the positive side terminal 102 of the spot welding machine 10/, a stud 106 is inserted and supported in the engagement opening /θ of this holder 103, and the negative side of the spot welding machine /θ/ is connected. terminal 10
≦ to a metal thin plate (M) such as an iron plate of a car 107.Incidentally, connect the tip 10 of the stud 106 to the thin plate
The stud 10 is placed approximately perpendicularly to the concave/10 surface of or, and when electricity is applied, a spark is generated and the stud 10 is placed on the concave/10 surface! is melt-planted. Next, this welded stud 10! Then, remove the holder 103 and insert this stud 10.
Insert the claw part //j of sliding hammer //2 into the through hole /// formed in j, and insert the shaft part of hammer //2/
A weight that is pivoted to move forward and backward at /l! Take the handle //
By suddenly hitting the part member /7, the shock can pull up the sliding hammer /2 and return the dent /10 of the thin plate 1otr to a smooth surface (indicated by the two-dot chain line).

After forming a smooth surface in this way, attach the claw part of the sliding hammer //2 to the stud /θ! Remove it from the 4th through hole ///, and use another tool, that is, the claw part of the twisting member //r, on the stand /θ! Insert it into the through hole /// and twist the member //?
Grasp part/20! By twisting from 0 to 900,
The welded stud 10j can now be removed from the thin plate 10♂. Stud 10! The welded spots are ground down with a grinder, smoothed out, and repainted to form a beautiful exterior.

[Problem that the invention seeks to solve]

Such a conventional tool includes a holder /θ3 for winter planting the stud 10j, and a thin plate /(M recess /10
Sliding hammer //2 to restore it and 10 welded studs! Twisting member to remove //? It requires three items, each of which is essential and therefore expensive.
This also requires a lot of management man-hours. In addition, since these three tools must be held and held back, work efficiency is not good.0 Furthermore, the stud/θ! If the insertion port 104t of the holder 103 is repeatedly inserted into the engagement port 104t, the insertion port 104t may become wide, causing looseness or lowering the electrical connection level.

In view of such conventional examples, the present invention aims to significantly improve the efficiency of stud welding work to make the concave portion of a thin plate a smooth surface, and to significantly reduce the number of man-hours for managing tools. The purpose is to provide reliable tools that do not cause looseness.

Means for Solving Problem C] In order to achieve this object, the present invention provides a first and second holder in which the stud can be engaged and disengaged at one end, and the other end is attached to a spot welder's plus A core rod that can be connected to the side, a handle that is integrally attached to the core rod, and a chuck that is provided on the outside of the first and second holders and that allows the clamping force of the first and second holders to be tightened or loosened. The tool is characterized by a more structured structure.

[For production]

By inserting the stud into the first and second holders and rotating the chuck in one direction, the first and second holders will be securely tightened and the studs will be supported, making it easier to weld onto the car body. After welding, just pull the handle and the dents in the car body will be reduced to zero. Furthermore, by rotating the chuck in the other direction, the inside of the first and second holders expands, making it easier to remove the studs, making it ideal for repeated welding.

〔Example〕

Next, the configuration of an embodiment of the present invention will be explained using FIGS. 1 to 7.

In the figure, / is the tool of the present invention, and both ends 2a.

A core rod 2 made of brass material with a male screw 3 carved into each part 2b.
A first holder made of a genuine material into which one end 2a of the core rod 2 is screwed and a male thread is provided on the outer periphery! And the corresponding holder! A copper-plated stud formed on an iron plate that is formed to match the notch part B and engaged with the groove 7 of the notch part B. The first holder! A second holder made of brass material that is held together with the second holder! And said first holder!
A female screw 10 is formed on the inner surface of the hollow part to be screwed into the male screw of the first holder! , a chuck made of iron having a taper i//a abutting on the tapered surfaces a and a of 9; a weight /l made of iron slidably supported on the core rod 2; The other end xb of the core frame is screwed into a cylindrical handle 13 made of iron, and a hollow insertion opening/IA is formed in the other end 2b of the core frame. A male screw /ja which is screwed into a female screw /lAa formed in the terminal is formed at one end, and the other end consists of a terminal /3 made of brass material exposed from the handle 13. The handle 13 includes a cylindrical body 16 and a through hole/7VC screw having a female screw/7a formed at a position approximately θ° different from the axis of the cylindrical body 16, that is, the axis of the terminal i3. A rod-shaped gripping member is included.

7g and more. This cylindrical body 16 has bolts/,! ;
1) is screwed together and fixed to terminal /j. Further, the above-mentioned eight 12 is approximately cylindrical, and its curved surface is formed at both ends/2.
a.

/2b protrudes like a flange, the diameter becomes thinner between both ends /2a and 72111, and the grip part/device draws a gentle curve so that the diameter in the middle is approximately the same as that of the ends /2a and /2b. is formed. Further, a notch J is formed in the end portion /2a of the weight 12 on the chuck // side, and a notch 21 corresponding to the notch 20 is formed in the chuck //. Furthermore, the inner surface //b of the side facing the one end /Ja of the weight /2 of the chuck l/ around the notch 2/ is the first holder! The diameter is large enough not to interfere with the male thread. The outer surface l/C of this inner surface //1) is knurled to prevent slipping, allowing the operator to rotate the chuck // by hand. Also, the first holder! A bottle made of iron is buried in the groove 7 of the notch part B, and it engages with the through hole ♂a of the stud ♂, and the stud ♂
The first Φ holder is attached to the stud t, which functions to prevent it from being easily removed. , Tip of ri: +, ? 1) A notch that comes into contact with and positions the stud t? b is formed.

The operation of the tool configured as described above will now be described.

First, the first Niholder! , ri, chuck i
Tighten i and leave space for stud r to be inserted.a In this way, attach weight 12 to the first holder! One end 2a is inserted into the three screwed rods λ, and the handle 1 is inserted into the other end 2b of the core frame.
Install 3. In advance, insert and lock the other end of the core frame 21) into the positive side connection part j of the ISF spot welding machine with the IC screwed in and the terminal exposed from the handle /3.
For example, connect the negative electrical side connection J4 to the car 27.
Connect it to either the car body 2g or a frame made of steel frame material that supports the car body 2g.

Insert it from the b side and engage the through hole cra and the bottle phantom,
Hold the non-slip part of the outer surface //c of the chuck ll and rotate it, using the tapered surface //a and the tapered surface ja, ? Tighten to hold down a. Thus, the second holder! is the first holder! Adhered to and at the same time, stud? Ha, the first Niholder! , is strictly adhered to. Next, the tip part ♂C of the stud t is brought into contact with the recess 30 of the side sill acter panel of the vehicle body, for example, and the switch 31 of the spot welding machine 2 is turned on, so that the tip part frC is welded into the recess 30. The gripping member of the handle 13 is missing.

By holding the weight 12 and slowly pulling it toward the handle 13 side, or by colliding the weight 12 with the handle 13 side, the flexibility of the vehicle body 2g itself allows the vehicle body 2g to be moved to the position shown by the two-dot chain line, that is, to the originally planned shape. The surface can be moved up to the surface.

Next, hold one gripping member and slowly hold it for about 4 tons! 0
By rotating the stud ♂, the distal end portion /c of the welded stud ♂ is twisted off from the vehicle body 2t.

That is, the welding work of the stud r also involves the dent 30 of the vehicle body 21r.
Both the work of making it flat and the work of removing the stud r from the car body 2g can all be done with one tool.

Furthermore, if this dent 300 area is large, is it a stud? After welding, loosen the chuck/l and attach the first Ni holder! , by releasing the ri and forming a space, pull the core frame toward you (then, with the stud ? still welded on 2g of the car body, remove it from the tool/, and attach another stud ♂ to the first holder!,
Insert the studs ♂ between the holes, tighten the chuck l/, and weld the studs on the two corners of the car body as described above. Loosen the chuck l/, and as shown in Fig. 7, studs ♂ are welded one after another, and the studs ♂ Through hole? Insert the rod-shaped member 32 into a, and pull it all the way.
Can be made into a smooth surface.

Furthermore, when we were continuously welding this stud r, 3
Bar λ, first Niholder! , 9, and if the chuck // becomes too hot to touch due to the welding work of the spot welder 2g, put a weight 1 in the notch 21 of the chuck /l.
By engaging the notch J of No. 2 and rotating the weight 12, the notch 20 collides with the notch 21, and the shock rotates the chuck 1, and the second working holder 9 loosens. , the stud r will come off, and there will be no inconvenience to the work.

〔Effect of the invention〕

Since the present invention has such a configuration, the work efficiency for smoothing the concave portion of the thin plate of the car body is significantly improved, and since the studs are supported reliably, the worker can concentrate only on the welding work. Because the stud is easy to remove,
It is possible to shorten the time for repeated welding, and the tool can be pulled immediately after welding, which has the effect of shortening the total time for dent correction.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a tool according to an embodiment of the present invention, and FIGS. The figure is [[-II line, m-1lI2
i, a cross-sectional view along the IV-■ line and the V-V line,
Figure 3 is from Figure 1! Figure 7
7 is a schematic explanatory diagram of a conventional tool, FIG. ,
? The front view of the stud used in the figure, Figure 12 is a schematic explanatory diagram of other tools. In the figure, / is a tool, 2 is 3 bars, 2a is one end, 2b is the other end, !, ri is No.-m: holder, ♂ is stud, l/ is chuck, /3 is handle, 2 is spot welder.

Claims (1)

[Claims] A core rod that has first and second holders on one end that can engage and detach studs, and the other end that can be connected to the positive side of a spot welder, and a handle that is integrally attached to the core rod. and,
A tool characterized by comprising a chuck provided outside the first and second holders, and capable of tightening or loosening the clamping force of the first and second holders.