JPS61132221A - Tool - Google Patents

Abstract

PURPOSE:To improve the operating efficiency in repairing a thin sheet by providing the 1st and 2nd holders used for attaching and detaching a stud, to one end of a mandrel as well as operating a clamping force of both holders through the rotation of a chuck. CONSTITUTION:The 1st holder 5 is attached to one end 3a of a mandrel 2 through an external thread 3, and the 2nd holder 9 is disposed in conformity with a notch 6 of holder 5. A grip 13 is attached to the other end 2b of mandrel 2 through an external thread 3. A stud 8 is inserted between the holders 5, 9, and the stud 8 is locked by the contracted holders 5, 9 when a chuck 11 arranged through the external thread 4 of the outer circumference of holder 5 is rotated. A thin sheet is replaced by welding the stud 8 to a repairing part of thin sheet and pulling it by the grip 13, and then the welded part of stud 8 is wrenched off by the grip 13. In this way, the efficiency of repairing by flattening the metallic thin sheet is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] 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: For example, Figures ♂ to 12
There is something like the one shown in the figure.

That is, a holder 703 made of aluminum is inserted and connected to the glass side terminal 102 of the spot welding machine 10/, a stud 10 is inserted and supported in the engagement opening 104t of this holder 103, and the negative side terminal 1 of the spot welding machine 10/ is connected.
04 is connected to a metal thin plate ior such as an iron plate of automobile/θ7. Next, the tip 10 of the stud 10j is placed approximately at right angles to the concave /10 surface of the thin plate 10♂, and by passing electricity, a spark is generated and the stud 10! is placed on the concave //θ surface. is melt-planted. Next, remove the holder 703 from this welded stud 10j, and remove this stud/
θ! The claw part //3 of the sliding hammer //2 is inserted into the through hole /// formed in the hole, and the weight //! By suddenly hitting the handle//object member/7, the shock will pull up the sliding hammer//2 and return the recess/10 of the thin plate ior to a smooth surface (indicated by the two-dot chain line). It is possible.

After forming a smooth surface in this way, the claw part //3 of the sliding hammer //2 is removed from the through hole /// of the stud 10j, and another tool, that is, the claw part // of the twisting member //r is inserted into the stud 10j. Insert into through hole /// and twist member //♂
By twisting the grip part 20 from 0 to 90 degrees,
The welded studs 10J' can be removed from the thin plate/(M) The welded studs on the 0 studs/θ are worn away with a grinder, smoothed out, and repainted to form a beautiful outer panel. It will be done.

[Problem that the invention seeks to solve]

In such a conventional tool, the stud 10! Holder 703 for welding and recess of thin plate 10♂/10
Three parts are required: a sliding member to return the stud 10j to its original state, and a twisting member h to remove the welded stud 10j. You will need it. In addition, since these three tools must be used and returned,
Poor work efficiency 0 In view of such conventional examples, the present invention aims to significantly improve the work efficiency of welding studs to make the concave portion of a thin plate a smooth surface, and to significantly reduce the number of man-hours required for tool management. [Means for Solving the Problems] In order to achieve this object, the present invention has a first and second holder at one end that can freely engage and disengage the stud, and a spot welder at the other end. A chuck is rotatably engaged on the outside of the first and second holders, and by rotation of the chuck, the clamping force of the first and second holders can be loosened or fixed. The tool is characterized in that it is provided in such a way that it is possible to perform the following operations.

[For production]

The stud is inserted into the first and second holders and is securely held by rotating the chuck, so it does not wobble during welding work and allows reliable work.Also, by rotating the chuck, The space between the first and second holders is widened, making it easier for the studs to come off.

〔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.

213, a core rod made of brass material with male threads 3 carved thereon, and a first rod made of brass material with male screw holes ruptured on the outer periphery, into which one end 2a of the five rods 2 is screwed. Holder,
A copper-plated stud formed on an iron plate that is formed to match the notch part B of the third holder and engaged with the groove 7 of the notch part 6. A second holder made of brass material that holds the first holder together with the first holder, and a female thread (io) screwed into the male screw of the first holder are formed on the inner surface of the hollow part. , a chuck made of iron having tapered surfaces //a abutting on the tapered surfaces ja and d of 9, a weight 12 made of iron that is slidably supported by the shaft, and the core rod co. The other end 2b is screwed into a cylindrical handle 13 made of iron, and a hollow insertion slot is formed at the other end 21:l of the core rod, and a hollow insertion slot is formed at the insertion opening l. A male screw screwed into the female screw/<La/ja is formed at one end, and the other end consists of a terminal/S made of brass material exposed from the handle/3.

The handle 13 has a cylindrical body 16, and a female screw 7a formed at a position different from the axis of the cylindrical body 16, that is, the axis of the terminal 150, is screwed into a through hole 7. A rod-shaped gripping member is included.

A bolt/sb is screwed into this cylindrical body 16, which is made of a groove, and is fixed to the terminal is. Further, the weight /J has a substantially cylindrical shape, and its circumferential surface is connected to both ends /! a.

/2b protrudes like a brim, the diameter becomes thinner between both ends /2&, 72k), and the grip part lq draws a gentle curve so that the diameter in the middle is approximately the same as that of the ends /2&, /2b. is formed. Further, a notch J is formed in the end /Ja of the weight 12 on the chuck II side, and a notch 2/ corresponding to the notch J is formed in the chuck //. Furthermore, the weight t2 of the chuck // around where this notch 21 is formed is
The inner surface //b facing the one end portion /2a has a large diameter to the extent that it does not interfere with the male screw hole of the first holder.
The outer surface iiC of this inner surface //1) is knurled to prevent slipping, allowing the operator to rotate the chuck // by hand. A pin made of iron is embedded in 7 and engages with the through hole of the stud t. It has a function that prevents it from coming off easily. Also, the above-mentioned stud ♂ has the above-mentioned holder No. 102! , tip of 9 1), ? A notch ♂b is formed which abuts on 1) and positions the stud ♂.

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

First, the first Niholder! , 9, Chuck/
Tighten l, leaving space for insertion of stud ♂. In this way, weight/2 is the first holder! One end 2a is inserted into the screwed core rod 2, and the handle 13 is attached to the other end 213 of the 5 rod 2. The other end 21) of the 5 rod 2 is screwed in in advance and the terminal lj exposed from the handle 13 is inserted and locked into the glass electrical side connection part J of the spot welding machine 2. Next, connect the negative electrical side connection to, for example, the car 27.
0 vehicle body 2g or a 7 nm λ made of steel frame material that supports the vehicle body 2g. With this, the first stud girl, Ni holder! , the tip of 9,
? Insert it from the b side, engage the through hole ♂a and the bottle phantom, hold the smoothed part of the outer surface //c of the chuck Jl and rotate it, and use the tapered surface //a to rotate it. Tapered surface ja? Tighten to hold down a. In this way, the second holder '7 becomes the first holder! At the same time, it is secured to the studs/stripes, first and second holder tabs. Next, the tip re of the stud r is brought into contact with a recess 30 in the vehicle body 2g, for example, a side sill outer panel, and the switch 31f of the spot welder 24c is turned on, so that the tip /c is welded into the recess 30. Next, the gripping member l of the handle 13.

By holding the /♂ and pulling it toward the handle 13 side, or by colliding the weight 12 with the handle /3 side, the flexibility of the vehicle body 2g itself allows it to move to the position shown by the two-dot chain line, that is, the originally planned position. The surface can be moved up to the surface of the shape.

Next, hold the gripping member/shape and slowly press the
The tip of the stud r that was welded by rotating it? C will be twisted off from the car body 2t O. In other words, the welding of the stud ♂, the work of making the dent 30 on the car body flat, and the work of removing the stud ♂ from the car body 2g are all done with one tool. It becomes possible to work.

Furthermore, if this dent 300 area is large, is it a stud? After welding, loosen the chuck and attach the first two holders! Release the ri and pull the core frame toward you to create a space, then remove the stud R from the tool while leaving the stud r welded on the 2nd corner of the car body, and insert another stud ♂ into the first and second bolts.
? Insert the studs in between, tighten the chuck //, weld the studs onto the car body 2S as described above, loosen the chuck //, and insert the studs one after another as shown in Figure 7. Welded and studded? Insert the rod-shaped member 32 into the through hole ♂a, and pull it suddenly.
0 Furthermore, this stud can be made smooth? When I was doing continuous welding work, the core rod λ1, Ni holder! , and if the chuck l/ becomes too hot to touch due to the welding work of the spot welding machine J, the weight 12 can be rotated by engaging the notch 20 of the weight 12 with the notch 2/ of the chuck //. , the notch 20 collides with the notch 2/, and due to the shock,
The chuck/l rotates and the first second holder! , 9 will loosen and the stud t will come off, and no inconvenience will occur in the work. [Effects of the Invention] Since the present invention has such a configuration, the work efficiency in making the recessed part of the thin plate a smooth surface is significantly improved. As we all know, the removal and removal of studs is much easier and more reliable, and moreover, the work at hand can be done in one place, resulting in a marked improvement in work efficiency. Furthermore, the present invention has the effect that the number of man-hours required for tool management can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a tool according to an embodiment of the present invention;
Figure to number! The figure is the "-" line, II [-H line, IV
- A cross-sectional view taken along line IV and v-v, and FIG. 6 is a cross-sectional view taken from FIG. Fig. 7 is an explanatory diagram of another action, Fig. 2 is a schematic explanatory diagram of a conventional tool, Fig. 2 is a view in the direction of the arrow in Fig. 2, Fig. 10 is a ? , 2 is a front view of the stand used, and FIGS. 1/ and 72 are schematic illustrations of other tools, respectively. In the figure, / is a tool, λ is 5 rods, 2a is one end, 2b is the other end, ! is the first holder, r is the stand, wa is the second holder, l/ is the chuck, and the review is spotty concubine iso. Patent applicant: Mitsuru Iwatate Yuyo 2ki

Claims (1)

[Claims] It has first and second holders on one end that can freely engage and detach the stud, and has a core rod that can be connected to the positive side of a spot welder on the other end, and the outside of the first and second holders. The tool is characterized in that a chuck is rotatably engaged with the chuck, and the gripping force of the first and second holders can be loosened or fixed by rotation of the chuck.