JPH0444350Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a spin welding device for fixing mounting clips and the like to vehicle moldings and the like.

[Conventional technology]

FIG. 5 is an exploded perspective view showing the installed state of the molding disclosed in Japanese Patent Application Laid-Open No. 60-183243. In the drawings, reference numeral 1 denotes a molding made of synthetic resin, which is formed into a long length and is attached to a mounting hole provided in a vehicle body panel 3 by means of a mounting clip 2. As for the mounting holes, a round hole 4 is provided in the central part, but elongated holes 5 are provided in other parts to accommodate expansion and contraction of the molding 1. In such a molding 1, the mounting clip 2 is fixed to the molding 1 by spin welding.

FIG. 6 is a perspective view showing a mounting clip for a round hole. It consists of a locking part 8 formed on the peripheral edge and elastically locked, and a protrusion 9 formed on the peripheral edge of the spin welding part 6.The spin welding part 6 is rotated by hooking the protrusion 9 on a rotating jig. When the molding body 10 is pressed against the back side of the molding body 10, one or both of the resins melts due to frictional heat, and the spin weld part 6 is welded to the molding body 10, and at the same time, the connecting part between the spin weld part 6 and the protrusion 9 is softened. The protrusion 9 comes off, and the jig rotates idly to form the spin weld part 6.
is fixed to the molding body 10.

FIG. 7 is an exploded perspective view showing a mounting clip for a long hole, and FIG. 8 is a sectional view of a portion thereof. The molding main body 10 has a rectangular recess 11 on the back surface,
The rectangular base 12 of the clip 2 is fitted onto this, and the donut-shaped spin welding part 6 is covered from above.
Hang the protrusion 9 on a jig and press it while rotating.
Welding is performed between the molding body 10, the base 12, and the spin welding part 6.

FIG. 9 is an exploded perspective view showing a mounting clip for common use with a round hole and an elongated hole, and FIGS. 10 to 13 are partial cross-sectional views showing the respective states before and after mounting.

The molding 1 has a molding main body 10 attached with a clip 2 consisting of a first clip 2a and a second clip 2b. The molding main body 10 is made of a thermoplastic synthetic resin such as ABS resin or PVC resin and is formed into a long length, and has a circular recess 13 on the back surface thereof.

The first clip 2a is made of a synthetic resin having elasticity such as polyamide resin or polyacetal resin, and has a disc-shaped spin welding part 6 that is spin welded to the recess 13. two legs 7 protruding so as to have a locking part 8 formed on both sides of the tip of the legs 7, a stopper 14 formed at the base of the legs 7, and a peripheral edge of the spin weld part 6. protrusion 9 formed on
has.

The second clip 2b is made of elastic synthetic resin like the first clip 2a, and includes a bell-shaped skirt portion 15, a hollow portion 16 into which the leg portion 7 is inserted, and a hollow portion 16 into which the leg portion 7 is inserted.
A groove portion 17 into which the locking portion 8 is inserted, an engaging portion 18 that engages with the locking portion 8, and an entire circumference of the tip of the skirt portion 15 to engage with the holes 4 and 5 of the vehicle body panel 3. It is formed to have a locking portion 19 and an engaging portion 20 that engages with the stopper 14 .

In the above configuration, if the spin weld part 6 is fitted into the circular recess 13 of the molding body 10 from the state shown in FIG. , 1st
As shown in FIG. 1, the spin welding part 6 is welded to the circular recess 13, the protrusion 9 is removed, and the first clip 2a is fixed to the molding body 10. Next, when the second clip 2b is attached to the fixed first clip 2a from the state shown in FIG. 12 as shown in FIG. 13, the leg part 7 is inserted into the hollow part 16, and the locking part 8 is inserted into the groove portion 17 and the engaging portion 18
The stopper 14 engages with the engaging portion 20, and the second clip 2b is locked to the tip of the first clip 2a.

Molding 1 configured as above is
The clip 2 is inserted into the holes 4 and 5 of the vehicle body panel 3 to be engaged and attached. In this case, the second clip 2
Since the locking portion 19 of b is formed over the entire circumference, it engages with both the round hole 4 and the elongated hole 5, regardless of the stopping position of the first clip 2a.

[Problem that the invention attempts to solve]

However, the jig used for spin welding the mounting clip 2 as described above is designed to simply hook the protrusion 9 and rotate the spin weld part 6 to press it to the molding body 10.
As shown in Fig. 4, burrs 21 tend to adhere to the welded area around the mounting clip 2 due to the resin waste discharged by the rotation of the spin welding part 6, and if they are not completely removed, the molding will be damaged. 1 could not be attached to the vehicle body panel 3.

This invention is intended to solve the above-mentioned problems, and aims to provide a spin welding apparatus that can simultaneously remove burrs attached to a welded part at the same time as spin welding.

[Means for solving problems]

This invention provides a spin welding device in which a protrusion formed on the peripheral edge of a spin weld part is hooked and rotated to press the spin weld part to the weld part. a rotary crimping part; an engagement protrusion that projects downward from a lower end of the rotary crimping part so as to engage with the protrusion and rotate the spin welding part; a tip thereof substantially coincides with the lower end of the rotary crimping part; a cutting blade that extends in a radial direction from the outer periphery of the rotary crimping part and cuts the burr; a suction housing that surrounds the periphery of the rotary crimping part; and a suction housing that removes the cut burr by suction. The spin welding apparatus is equipped with a suction means provided in the suction housing.

[Effect]

In the spin welding device of this invention, when the protrusion of the spin weld part is hooked by the engagement protrusion of the rotary crimping part and pressed onto the part to be welded while rotating, welding occurs due to the rotational heat and the protrusion is cut. When the spin weld stops, the burr is cut off by the cutting blade. The cut burr is removed by vacuum suction from the suction housing by the suction means.

〔Example〕

This invention will be described below with reference to embodiments shown in the drawings. Fig. 1 is a vertical sectional view showing an embodiment of this invention, Fig. 2A is a perspective view taken along plane A-A,
B is a perspective view cut along the B-B plane, FIG. 3 is a vertical sectional view showing the state during welding, and FIG. 4 is a vertical sectional view showing the state after welding. The same symbols as in FIGS. 5 to 14 are the same or equivalent. Show parts.

In the figure, reference numeral 22 denotes a cylindrical rotary crimping part, which has an engaging protrusion 23 at its lower end that engages with the protrusion 9 of the spin welding part 6. A storage hole 23 that has an extending cutting blade 24 and rotatably stores the holding part 25.
is located downward from the central portion, and has a rotating crimp shaft 27 at the upper end. The holding portion 25 has a holding hole 28 located downward from the center, which is slightly narrower than the width of the leg portion 7 of the clip 2, 2a, and is adapted to hold the clip 2, 2a by the elasticity of the leg portion 7. The tip of the cutting blade 24 coincides with the lower ends of the rotary crimping part 22 and the holding part 25. So as to surround the periphery of the rotary crimping part 22,
A suction housing 29 is provided so as to be movable up and down, and a sealing material 30 such as a side wall having air permeability is provided at the lower open end of the housing 29, and a suction pipe 31 is provided on the side wall. ing.

In the above configuration, the legs 7 of the clips 2 and 2a are inserted into the holding holes 28 and held by the holding part 25 so that the spin-welded parts 6 come into contact with the lower ends of the holding parts 25, and vacuum suction is performed from the suction pipe 31. While
When the rotary crimping unit 22 is started, the engagement protrusion 23 comes into contact with the protrusion 9 of the clip 2. When pressed down while rotating, the center of the spin welding part 6 is first pressed against the bottom surface of the molding body 10, and the molding body 10 begins to melt due to the frictional heat generated by the rotation. If the pressing is continued further, the molten resin 32 is discharged to the outside as shown in FIG. 3, and the spin welding part 6 is welded while being pushed into the molding body 10. When the welding is completed, the engagement protrusion 23 shears the protrusion 9 due to the increase in rotational torque, and as a result, the rotation of the holding part 25 is stopped, and only the rotary crimping part 22 continues to rotate and the burr 21 is removed.
cut. The cut burrs are removed by suction from the suction pipe 31.

In the above description, the rotary crimping part 22 and the holding part 2
5. The structure of the suction housing 29, etc. is not limited to that shown in the drawings, and can be modified. Furthermore, although the above embodiments have been described with reference to spin welding of clip 2 in FIGS. 9 to 13, spin welding of clip 2 in FIG. can be similarly applied, in which case each clip 2 or spin weld 6
A holding portion 25 having a structure corresponding to the above can be used.

[Effect of idea]

As described above, according to this invention, the engaging protrusion protrudes from the lower end of the rotary crimping part, and the cutting blade whose tip almost coincides with the lower end of the rotary crimping part protrudes from the outer periphery of the rotary crimping part. Since the suction housing is equipped with a suction means, the burr attached to the welded part can be removed by suction at the same time as spin welding by cutting it on the same plane as the lower end of the rotary crimping part, making the surface of the welded part uniform. At the same time, it is effective in preventing the cut burrs from re-attaching.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of this invention, Fig. 2A is a perspective view taken along plane A-A,
B is a perspective view taken along B-B, Figure 3 is a vertical sectional view showing the welding process in progress, and Figure 4 is a vertical cross-sectional view showing the state after welding. Figure 5 is an exploded perspective view showing the molding installed. The figure is a perspective view showing a mounting clip for round holes.
Figure 7 is an exploded perspective view showing the mounting clip for the oblong hole;
Fig. 8 is a cross-sectional view of a part of the clip, Fig. 9 is an exploded perspective view showing a mounting clip that can be used for round and oblong holes, and Figs. 10 to 14 are cross-sectional views of a part of the clip before and after installation. It is. In each figure, the same reference numerals indicate the same or equivalent parts, 2 is the clip, 6 is the spin welding part, 22 is the rotary crimping part, 23 is the engaging protrusion, 24 is the cutting blade, 25
29 is a holding portion, 29 is a suction housing, and 30 is a sealing material.

Claims (1)

[Scope of Utility Model Registration Claim] A spin welding device that welds the spin weld by hooking and rotating a protrusion formed on the peripheral edge of the spin weld to press the spin weld to the part to be welded, comprising: a rotary crimping part that crimps the part to be welded; an engagement protrusion that projects downward from a lower end of the rotary crimping part so as to engage with the protrusion and rotate the spin welding part; a cutting blade extending radially from the outer periphery of the rotary crimping part to cut the burr so as to substantially coincide with a lower end of the rotary crimping part; a suction housing provided to surround the periphery of the rotary crimping part; and a suction means provided in the suction housing to suction remove the burrs that have been formed.