JPH0340667Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a molding attachment structure for attaching an automobile side molding or the like to the body of an automobile, and can be used for moldings containing inserts in general.

[Prior Art] An example of a conventional molding attachment of this type is a clip for a side molding for an automobile as shown in FIG. FIG. 4 is a sectional view of a conventional side molding fixture for an automobile, and FIG. 5 is a front view of the side molding side.

In the figure, the side molding 1 is buried so as to line the resin part 2 and the back surface of the resin part 2,
It consists of an insert 3 with only its back side exposed. Usually, the insert 3 has a plate-like structure in which a part of the insert 3 is curved as shown in the figure in order to obtain a predetermined strength with a predetermined thickness.

A mounting bracket 5 for holding the clip 4 in an inserted state is fixed to the exposed surface of the insert 3. The mounting bracket 5 is the insert 3
It consists of a mounting flange part 5a which is welded to the clip 4, and a grip part 5c provided with a clip insertion recess 5b into which the insertion base 4a of the clip 4 is fitted.

Further, the clip 4 has a size to be fitted into the grip portion 5c of the mounting bracket 5, and the small diameter portion 4 is inserted into the clip insertion recess 5b by pressing force.
b, and a locking protrusion 4c that is inserted and locked into the body-side insertion hole of the object to be installed.

In this type of molding fixture, the insertion base 4a of the clip 4 is placed on the opening side of the clip insertion recess 5b of the grip part 5c of the mounting bracket 5, and when the clip 4 is pressed, the small diameter of the clip 4 is The portion 4b is inserted into the clip insertion recess 5b.

Therefore, once the clip 4 is inserted up to the large diameter part of the clip insertion recess 5b, unless a special pressing force is applied in the direction of detaching from the clip insertion recess 5b, the clip 4 will be inserted into the clip insertion recess 5b.
There is no departure from b.

However, in this type of molding mounting means, the mounting flange portion 5a of the mounting bracket 2 is bent outward and welded to the insert 3, so that the mold core side (or cavity side) is bent during injection molding.
However, there was a problem in that the resin was located on the outer surface of the mounting flange portion 5a, and the resin injected from the gap between the core and the insert 3 protruded, causing burrs.

Furthermore, if the core side of the mold is formed so as to be in direct contact with the insert 3 on the outside of the mounting flange 5a, and the injection pressure of injection molding is received only on the outside of the mounting flange 5a, the injection pressure will Therefore, there was a problem that the center part of the insert 3, that is, the center part of the mounting bracket 5, was curved outward (to the right in the figure), and good molding could not be performed. Alternatively, if the curvature increases, the central part of the clip insertion recess 5b of the mounting bracket 2 is pressed and deformed, causing problems such as changes in the dimensions of the gripping part 5c, making it impossible to insert the insertion base 4a of the clip 4. It was hot. As a solution to this type of problem, there is a method of increasing the thickness of the insert 3, but this is undesirable because it is expensive.

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems and provide a molding fixture that allows the insert and the fixture to be molded without being deformed during injection molding, and that allows for easy molding installation.

[Means for Solving the Problems] The molding fixture according to the present invention includes a mounting fixture attached to an insert, and a clip that fits into the mounting bracket and is locked in an insertion hole of an object to which the molding is attached. The mounting bracket includes a grip portion consisting of a bottom portion and an upright portion having an approximately U-shaped cross section with the opening thereof facing upward, and both ends of the upright portion being bent inward, The gap between the two ends consists of a fitting part that has the maximum opening width at approximately the center thereof, and a regulating part consisting of restraining parts on both sides of the fitting part, and the clip has an insertion base that fits into the grip of the mounting bracket, and an insertion base that has a maximum opening width at the center thereof. It consists of an insertion locking portion formed with a step and a locking protrusion that locks into the insertion hole of the object to which the molding is attached.

[Function] In the present invention, the mounting bracket attached to the insert has a grip portion consisting of a bottom portion and an upright portion with an approximately U-shaped cross section with the opening facing upward, and both ends of the upright portion being folded inward. The gap between the two bent ends consists of a fitting part having a maximum opening width at approximately the center thereof and a regulating part consisting of a restraining part on both sides of the fitting part,
The clip that is held in the insertion hole of the object to which the molding is attached has an insertion base that fits into the grip of the mounting bracket, an insertion locking portion formed by providing a step on the insertion base, and the insertion hole that is attached to the object to which the molding is attached. It consists of a locking protrusion that locks into the insertion hole of an object.

The insertion locking portion formed by providing a step on the insertion base is inserted by pressing the gap between the end portions of the restraining portion of the mounting fitting, and the insertion locking portion is fitted into the fitting portion.
The fitting portion of the mounting bracket is formed to have a wider width than the insertion and locking portion of the clip, and the sliding movement in the left-right and up-down directions is restricted within that range.

The bottom part of the mounting bracket, which has a substantially U-shaped cross section, is attached to the insert, and the flange part does not protrude outside the mounting bracket, so it is possible to increase the wall thickness of the mold core supported at both ends. Moreover, during injection molding, the bottom of the mounting fitting acts as a reinforcing plate for the insert, and the insert is reinforced against the injection molding pressure so that it does not bend.

[Example] Fig. 1 is a sectional view of the molding fitting according to the first embodiment of the present invention, and Fig. 2 is a sectional view of the mounting fitting and clip of the first embodiment used in Fig. 1. b is a longitudinal cross-sectional view thereof, and b is a cross-sectional view thereof. FIG. 3 is a perspective view of the molding fixture according to the first embodiment of the present invention.
In the figures, the same reference numerals and symbols as in the conventional example indicate the same or equivalent parts as in the conventional example.

A grip portion 71 of the mounting bracket 7 is composed of a bottom portion 7a having a substantially U-shaped cross section with the opening facing upward, and an upright portion 7b. The gripping portion 71 guides the insertion base 6a of the clip 6 and the insertion locking portion 6 of the clip 6.
b to the fitting portion 7d of the mounting fitting 7.
The bottom portion 7a is attached to the insert 3 by fixing means such as welding.

Both ends of the upright part 7b of the mounting bracket 7 are bent inward, and the interval between the bent ends is such that the fitting part 7d has the maximum opening width at approximately the center thereof, and the restraining parts 7c on both sides thereof. The regulating section 72 is constructed from the above. The restricting portion 72 restricts the movement of the clip 6. The restricting portion 7c of the restricting portion 72 comes into contact with the insertion locking portion 6b of the clip 6, and the pressing force applied to the clip 6 causes the clip 6 to move. The insertion locking part 6b is
It is configured so that it can pass through the restraining part 7c of the regulating part 72. Then, the clip 6 that has passed through the restraining part 7c enters the fitting part 7d. The fitting portion 7d is set to have a wider width than the insertion locking portion 6b of the clip 6, and the clip 6 extends inside the fitting portion 7d, that is, within the maximum opening width at approximately the center thereof, to the upper and lower and both end restraining portions. 7
It is configured so that it can be moved left and right within c.

The insertion base 6a of the clip 6, which fits into the grip 71 of the mounting bracket 7, is formed to be slightly smaller in width than the grip 71. The insertion base 6a has a width greater than or equal to the maximum opening width of the approximately central portion of the fitting portion 7d. A step is provided on the insertion base 6a to form an insertion locking portion 6b. The insertion locking portion 6b is formed to have a width that allows it to pass through a restraining portion 7c forming a restricting portion 72 of the mounting bracket 7 by the pressing force applied to the clip 6. That is, preferably, one or both of the insertion locking part 6b of the clip 6 and the regulating part 72 of the mounting bracket 7 have the property of an elastic body. Incidentally, the clip 6 in this embodiment is made of resin. The properties of this elastic body are such that the clip 6 that is retained in the insertion hole 11 of the object 10 to which the molding is attached is
It is also used for the locking protrusion 6c at the end.

In the molding fixture of this embodiment configured in this way, the clip 6 that has once passed through the restraint part 7c and entered the fitting part 7d is in the restraint part 7c in a normal state.
It does not pass through and separate from the fitting portion 7d.
The insertion locking portion 6b formed by providing a step on the insertion base 6a is inserted by pressing the interval between the end portions of the restraining portion 7c of the mounting bracket 7, and is inserted into the fitting portion 7d. 6b. The fitting portion 7d of the mounting bracket 7 is formed to have a wider width than the insertion locking portion 6b of the clip 6, and can restrict sliding in the horizontal and vertical directions within that range. It is possible to accommodate dimensional errors in the insertion hole 11 drilled in the attachment target 10.

Furthermore, since the bottom part 7a of the mounting bracket 7, which has a substantially U-shaped cross section, is attached to the insert 3, and the flange part does not protrude outside the mounting bracket 7, the bottom part 7a of the mounting bracket 7 has a substantially U-shaped cross section. The core can be made thicker, and when injection molding, the mounting bracket 7 can be used.
The bottom portion 7a of the insert 3 acts as a reinforcing plate for the insert 3, so that the insert 3 is reinforced against injection molding pressure and does not bend.

In the above embodiment, the restraining parts 7c on both sides constituting the regulating part 72 of the mounting bracket 7 have the same distance between the ends bent inward from both ends of the upright part 7b. If implemented, the third
Like the restraint part 7c' in the embodiment shown in the figure, the clip 6 inserted from one restraint part 7c side with a narrower spacing than the other restraint part 7c may cause the other restraint part to be restrained by excessive pressing force. It can be formed so that it does not pass through the portion 7c'.

Furthermore, the insertion base 6a of the clip 6 that fits into the grip 71 can have a plurality of linear grooves 6d carved on the bottom 7a side surface of the mounting bracket 7 to reduce contact resistance during insertion. .

The locking protrusion 6c of the clip 6, which is inserted and locked into the insertion hole 11 formed in the object 10 to which the molding is attached, preferably has high elasticity and high strength.
For example, a groove 6e may be formed in the locking protrusion 6c. At this time, the locking protrusion 6c has elasticity and can ensure locking with the insertion hole 11.

[Effects of the invention] As described above, the molding fixture of the present invention has a gripping part consisting of a bottom part and an upright part having an approximately U-shaped cross section with the opening facing upward, and a holding part of the upright part. Both ends are bent inward, and the interval between the bent ends has a maximum opening width at approximately the center thereof, and the fitting part is comprised of a restricting part consisting of a restraining part on both sides of the fitting part,
The clip consists of an insertion base that fits into the grip of the mounting bracket, an insertion locking portion formed by providing a step on the insertion base, and a locking protrusion that locks into the insertion hole of the object to which the molding is attached. Because it is a product, when injection molding,
The bottom of the fitting acts as a reinforcing plate for the insert and will not bend under injection molding pressure.

Furthermore, the width of the fitting part is larger than the insertion and locking part of the clip, and the sliding movement in the left and right and up and down directions is restricted within that range. Can flexibly respond to dimensional errors in the insertion hole.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the molding fixture of the first embodiment of the present invention, Fig. 2 is a cross-sectional view of the mounting bracket and clip of the first embodiment used in Fig. 1, and Fig. 3 is a cross-sectional view of the molding fixture of the first embodiment of the present invention. FIG. 4 is a sectional view showing a conventional side molding fixture for an automobile, and FIG. 5 is a front view of the side molding side. In the figure, 3: insert, 6: clip,
6a: Insertion base, 6b: Insertion locking portion, 6c: Locking protrusion, 6d, 6e: Groove, 7: Mounting bracket, 7a:
Bottom part, 7b: Standing part, 7c, 7c': Restraint part, 7
d: Fitting portion. In addition, in the figures, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] (1) In a molding fixture comprising a mounting bracket attached to an insert and a clip that fits into the mounting bracket and is locked in an insertion hole of an object to which the molding is attached. , the mounting bracket has a gripping part consisting of a bottom part and an upright part having a substantially U-shaped cross section with the opening facing upward;
Both ends of the upright part are bent inward, and the interval between the bent ends is comprised of a regulating part consisting of a fitting part and a restraining part on both sides of the fitting part, which has a maximum opening width at approximately the center thereof; The clip consists of an insertion base that fits into the grip of the mounting bracket, an insertion locking portion formed by providing a step on the insertion base, and a locking protrusion that locks into the insertion hole of the object to which the molding is attached. A molding fixture characterized by: (2) The molding according to claim 1 of the utility model registration claim, wherein the interval between the restraining parts on both sides constituting the regulating part of the mounting bracket is such that one interval is narrower than the other interval. Mounting hardware. (3) The insertion base of the clip that fits into the gripping part is characterized in that a plurality of linear grooves are carved on the bottom surface of the mounting bracket, as set forth in claim 1 of the utility model registration claim. Molle fittings.