JP3210436B2 - Welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus for welding a skin material or the like of interior parts of a vehicle, and more particularly to a measure for improving the appearance of a welded portion.

[0002]

2. Description of the Related Art Conventionally, a skin material of an interior part of a vehicle is formed by welding a plurality of skin materials, and a welding apparatus for manufacturing this kind of skin material is disclosed, for example, in Japanese Utility Model Application Laid-Open No. 58-1759.
As disclosed in Japanese Patent Laid-Open No. 05-2005, the edges of a plurality of skin materials are projected to the back side and brought into contact, and both edges are welded with two welding electrodes sandwiched from both sides.

[0003]

However, in the above welding apparatus, the welding surface of the welding electrode is flat and no measures are taken to prevent the molten material from flowing out. When the melted material of the skin material is pressed by the flat welding surface, it flows out to the surface of the skin material and solidifies on the surface to cause welding burrs, and the appearance of the welded portion is poor. For this reason, as a measure for improving the appearance, in the above welding apparatus, the welding burrs are formed in a thread-like edging pattern, but the appearance is unnatural, and if possible, it is desired that the welding burrs are not exposed at all on the surface.

The present invention has been made in view of the above circumstances, and has as its object to prevent exposure of welding burrs to the surface.

[0005]

Means for Solving the Problems In order to achieve the above object, means according to the first aspect of the present invention is to accommodate a melt generated from a welding material in a welding portion for welding a plurality of skin materials. A melt storage section is provided.

More specifically, the means of the invention according to claim 1 is that a plurality of welding materials are formed by projecting from the both sides of the projecting portions projecting toward the back surface in such a manner that adjacent edges are in contact with each other. For a welding apparatus having a pair of welding portions to be sandwiched and welded, at least one welding surface of the pair of welding portions accommodates a melt generated from the welding material.
A plurality of concave melt accommodating sections are spaced along the welding line.
The structure is provided with a gap .

Furthermore, the means for invention was devised in accordance with claim 2, in the welding apparatus according to claim 1, in the welding surface of each melt accommodating portion is provided, communicating with the respective melt housing part
And a structure in which a melt contained in the respective melt housing part a plurality of discharge grooves for discharging to the rear surface side of the material for the welding are provided.

[0008]

According to the above construction, according to the first aspect of the present invention,
The plurality of welding materials protrude toward the back surface in a state where they are in contact with each other at adjacent edge portions, and form a protruding portion. The protruding portions are sandwiched and welded by a pair of welding portions. At least the one welding surface, a plurality of concave melt containing portion welding line to accommodate the melt resulting from the welding material of the pair of welding portions
Because it is spaced along the down, be pressed against the welding surface of the molten portion at the time of welding, the melt produced by the projections melt accommodated without flowing on the surface of the skin material Housed in the department.

Furthermore, in the invention according to claim 2, since each melt accommodating portion discharge groove communicates with the discharging melt contained in the respective melt housing portion on the back side of the fusion bonding material Even if a large amount of melt is generated, the melt overflowing from each melt accommodating portion is discharged to the back side through the discharge groove, and does not flow out to the surface of the skin material.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 show a first embodiment of the present invention.
The first embodiment shows an example in which the welding apparatus of the present invention is applied to an apparatus for manufacturing interior parts of a vehicle, for example, a skin material of an instrument panel. As shown in FIG. 4, the instrument panel 1 has holes and irregularities for disposing various instruments and switches, and as shown in FIG. 5, a vinyl chloride resin, an ABS resin, and the like. Skin material 3 consisting of
And a base material 5 provided on the back side of the skin material 3 and made of a hard plastic or a metal plate, and the skin material 3 and the base material 5 are integrally formed between the skin material 3 and the base material 5. And a cushion material 7 made of a foamed resin such as foamed polyurethane.

As shown in FIG. 4, the skin material 3 includes an upper skin material 9 as a welding material constituting the upper part of the instrument panel 1 and a lower skin material as a welding material constituting the lower part. 11 are welded to form welding lines L, L extending in the vehicle width direction at the center. Then, as shown in FIG. 5, the adjacent edge portions 9a, 11a of the upper and lower skin materials 9, 11 protrude toward the rear surface side in a state where their surfaces are in contact with each other, and are formed in the protruding portion 13, The welding lines L, L are formed by welding the projecting portions 13. The upper and lower skin materials 9 and 11 are formed into a predetermined shape for the instrument panel 1 before welding.

As shown in FIGS. 1 to 3, the welding apparatus A generally includes a base 15, a first skin material receiving jig 17 disposed on the base 15, and a first base material receiving jig 17. The first skin material receiving jig 17 is fixed on a base 15. On the other hand, the second skin material receiving jig 19 is movably mounted on a rail 21 on the base 15 and is connected to a first slider 23 composed of a hydraulic cylinder or a pneumatic cylinder. The first skin material receiving jig 17 is configured so as to be able to approach and separate from the first material receiving jig 17 .

The first skin material receiving jig 17 and the second
The first and second skin material receiving jigs 17 and 19 are formed in the same configuration except that they are movable on the base 15. The mounting portions 25 are formed on the upper part of the pallet. The mounting portion 25 of the first skin material receiving jig 17 is formed in an upper surface shape corresponding to the three-dimensional shape of the upper skin material 9 to be mounted. The mounting portion 25 is formed in an upper surface shape corresponding to the three-dimensional shape of the lower skin material 11 to be mounted. The upper skin material 9 is placed on the mounting portion 25 of the first skin material receiving jig 17, and the lower skin material is mounted on the mounting portion 25 of the second skin material receiving jig 19. 11 is mounted.

Each of the mounting portions 25, 25 has a base 15
A central inclined surface 25a which is formed in a gentle mountain shape having a top near the center of the base 15 and descends toward the center of the base 15, and from the center of the base 15 to the side. It comprises a downwardly inclined side surface 25b.

Further, inside the first and second skin material receiving jigs 17 and 19, suction means 27 for sucking the upper and lower skin materials 9 and 11 are formed. The adsorbing means 27 includes an air chamber 29, a communication hole 31 for performing intake and air supply to the air chamber 29, and
A plurality of vacuum holes 33, 33,.
Before the end of the welding, each of the vacuum holes 33, 3
The surface materials 9 and 11 are sucked by vacuuming from 3, and are brought into contact with the entire surface of the side inclined surface 25b, and after the welding is completed, air is supplied to the vacuum holes 33, 33 and so on. The applied skin material 3 is configured to be peeled off from the mounting portions 25, 25.

In the welding device A, a pressing jig is placed on the boom 35 at the top of the welding device A so as to be disposed above the first skin material receiving jig 17 and the second skin material receiving jig 19. The pressing jig 37 is provided with a pressing portion 39 which can come into contact with and separate from the central inclined surfaces 25a, 25a of the upper and lower skin material receiving jigs 17, 19. .

Further, upper and lower central inclined surfaces 25 are provided.
A pair of left and right welding electrodes 41A, 41B as welding portions and a cutter 43 for cutting the edge portions 9a, 11a are provided on the first and second skin material receiving jigs 17, 19 below the first and second skin materials a, 25a. Are arranged above and below. Left electrode 4 for welding
1A is a first skin material receiving jig 17 via a second slider 45 composed of a hydraulic cylinder or a pneumatic cylinder.
And can reciprocate in the left-right direction in the figure.

The pair of welding electrodes 41A, 41B are connected to the skin materials 9, 11 so as to form the welding lines L, L.
Are arranged over the entire length of the projecting portion 13, and are configured to irradiate a high frequency with the projecting portion 13 sandwiched from both sides to generate heat from inside the material and to perform welding.

Further, as a feature of the present invention, as shown in FIGS. 2 and 3, the welding surfaces 47, 47 of the welding electrodes 41A, 41B are provided with a plurality of concave melt accommodating portions 49, 4 respectively.
Are provided, and each of the melt accommodating portions 49, 49,... Is configured to accommodate a melt produced by melting the skin materials 9, 11 between the welding surfaces 47, 47. . Are formed in elliptical concave portions extending toward the welding lines L, L, respectively, and are arranged at predetermined intervals in the welding lines L, L. Thus, the adjustment of the securing of the accommodation amount of the welded material and the securing of the contact area of the welding surfaces 47, 47 are achieved.

Further, the cutter 43 for cutting the edge portions 9a and 11a has a front end portion closer to the edge portion 9A than the welding electrode 41A on the left side.
a, the welding electrode 4 on the left side
Moves rightward at the same time as the movement of 1A to move to the edge portions 9a, 11a.
Is to be cut.

Next, the operation of the welding device A will be described.

First, as shown in FIG. 1, the upper skin material 9 is placed on the mounting portion 25 of the first skin material receiving jig 17, and the lower skin material 11 is placed on the second skin material. It is placed on the placing portion 25 of the material receiving jig 19.

The evacuation holes 33, 33,.
, And the left and right skin materials 9 and 11 in the figure are laterally inclined surfaces 25b of both the left and right mounting portions 25 and 25, respectively.
Suction is applied to the entire surface to remove slack.

Next, the second skin material receiving jig 19 is brought closer to the first skin material receiving jig 17, and the pressing portion 39 of the pressing jig 37 is moved downward to move the upper skin material receiving jig 19 downward. Material 9
And is brought into contact with the lower skin material for 1 1, the central inclined surface 25a and the second skin material for receiving jig 19 of the first skin material for receiving jig 17 with the both epidermal material 9,11 respectively It is set on the central inclined surface 25a.

At this time, the upper and lower skin materials 9,
11 is a left and right center inclined surface 25 from the raised state.
a, 25b, the edges 9a, 11a
Slides down below the cutter 43 for cutting the edge portions 9a and 11a.

Thereafter, the second skin material receiving jig 19 is further brought closer to the first skin material receiving jig 17, and the edge 9a of the upper skin material 9 and the end of the lower skin material 11 are moved. The protrusion 13 is formed by closely contacting the edge 11a. Then, as shown in FIG. 3, the second slider 45 is operated to sandwich the projecting portion 13 from both sides by the pair of left and right welding electrodes 41 </ b> A and 41 </ b> B and weld. A pair of welding electrodes 41A, 41
The skin materials 9, 11 between the welding surfaces 47, 47 of B are welded and joined, and the skin material 3 is manufactured.

Finally, the second skin material receiving jig 19 is separated from the first skin material receiving jig 17 and
The pressing portion 39 of the pressing jig 37 is moved upward, and air is sent from the vacuum evacuation holes 33, 33,... To the left and right mounting portions 25, 25 to remove the skin material 3. .

In this embodiment, at the time of welding, the molten material generated from the skin material 9, 11 at the projecting portion 13 is applied to both welding surfaces 47, 4.
It is pressed at 7 and tries to flow out to the surface of the skin material 3,
Along the welding lines L, L between the welding surfaces 47, 47
A plurality of concave melt storage portions 49 provided at intervals ;
Are solidified by being housed in 49, ... , So that the molten material does not flow out to the surface, so that exposure of the welding burr to the surface can be prevented.

Next, FIGS. 6 and 7 show a second embodiment of the present invention. In the second embodiment, the melt accommodating portions 49, 49,... Are provided only on the welding surface 47 of the welding electrode 41A on the left side. Also, the left welding surface 47 communicates with each of the melt accommodating portions 49, 49,.
49, a plurality of discharge grooves 51, 51 for discharging the melt contained ... on the back surface side of the skin material for 9,11, ... are provided. Each of the discharge grooves 51, 51,... Is formed to have a width smaller than the width of the oval-shaped melt accommodating portions 49, 49, and so as to suppress a decrease in the contact area of the welding surface 47.

Therefore, the melt storage sections 49, 49, ...
Or Raafure was melt discharge grooves 51 and 51, to be discharged to the rear surface side through the ..., without flowing on the surface of the skin material 3, to the surface of the well welding burr Need higher melting amount Exposure can be prevented.

FIG. 8 shows a modification of the second embodiment.
In this modification, the respective melt accommodating portions 49, 49,... And the discharge grooves 51, 51,.
Are formed in a single groove shape. This allows
The welding surfaces 47, 47 can be easily attached to the molten material storage portions 49, 49,.
And discharge grooves 51, 51,... Can be formed.

The welding apparatus of each of the above embodiments is also used for welding a skin material other than interior parts of a vehicle such as the instrument panel 1 and the like.

The welding portion may be, for example, a heater having a built-in heater, other than the welding electrodes 41A and 41B of the above embodiments.

Further, the molten material accommodating portions 49, 4 of the first embodiment.
.. May be provided on any one of the welding surfaces 47, 47 of the pair of left and right welding electrodes 41A, 41B.

[0036]

As described above, according to the first aspect of the present invention, at least one of the welding surfaces of the pair of welding portions is provided with a plurality of concave melts accommodating the melt generated from the skin material. Since the material storage portions are provided at intervals so as to be along the welding line , the melt is stored in the melt storage portion and does not flow out to the surface. Can be blocked.

Further, according to the invention according to claim 2, the discharge in each soluble <br/> Torubutsu accommodating portion for discharging the melt contained in the respective melt housing portion on the back side of the skin material for Since the grooves communicate with each other, the melt overflowing from each melt accommodating portion can be discharged to the back side, and even when the amount of fusion is large, exposure of the welding burr to the surface can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a welding apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a welding electrode in the welding device.

FIG. 3 is an enlarged sectional view of a main part of the welding device.

FIG. 4 is a perspective view of an instrument panel using a skin material manufactured by the welding device.

FIG. 5 is an enlarged perspective view of the instrument panel, in the vicinity of a welding line.

FIG. 6 is an enlarged perspective view of a welding electrode of a welding device according to a second embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a main part of the welding apparatus according to the second embodiment.

FIG. 8 is an enlarged perspective view of a welding electrode of a welding device according to a modification of the second embodiment.

[Explanation of symbols]

 9 Material for upper skin (material for welding) 9a Edge of material for skin 11 Material for lower skin (material for welding) 11a Edge for material for lower skin 13 Projection 41A, 41B Welding electrode (welding part) 47 Welding surface 49 Melt storage part 51 Drain

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidenari Iguchi 2-25-31 Kabeminami, Asakita-ku, Hiroshima City Inside Nishikawa Chemical Co., Ltd. (72) Inventor Toshikazu Iwasaki 3-chome, Minamikagaya, Suminoe-ku, Osaka-shi 13 Within Pall Industries Co., Ltd. (56) References JP-A-1-250290 (JP, A) JP-A-57-171623 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) B29C 65/00-65/82

Claims (2)

(57) [Claims] 1. A welding apparatus comprising a pair of welding portions for welding a pair of welding materials sandwiching a projecting portion projecting to a back surface side from both sides thereof in a state where adjacent edge portions of the welding material are in contact with each other. At least one of the welding surfaces of the pair of welding portions,
A welding apparatus, wherein a plurality of concave melt accommodating portions for accommodating a melt generated from the welding material are provided at intervals so as to be along a welding line . To 2. A weld surfaces in which the respective melt accommodating portion is provided, discharging the respective molten waste retaining space in communication with the melt contained in the respective melt housing portion on the back side of the material for the above welding Do
2. A number of discharge grooves are provided.
The welding apparatus as described in the above.