JPH10252727A - Mounting structure of synthetic resin part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a synthetic resin part for a cowl top cover, etc., to a metallic part, such as a cowl top panel, with no backlash. SOLUTION: The mounting structure of a synthetic resin part is such that a coupling member 18 is rotatably formed integrally with a cowl top cover 7 formed of synthetic resin, and the rotary shaft 23 of the coupling member 18 and an inclining lock piece 21 are formed in a protrusion state integrally with the coupling member 18. Through rotation of the coupling member 18, a lock piece 21 is inserted in and engaged with the lock hole 24 of the cowl top panel 17 for mounting. Since the lock piece 21 is inclined and effect wedge action is performed, mounting freed from a backlash is practicable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a synthetic resin part formed of a synthetic resin.

[0002]

2. Description of the Related Art Automobile parts, such as a cowl top cover, an instrument panel, a rear parcel tray, and a luggage finisher lid, are formed of a synthetic resin and are mounted on a body panel as a part to be mounted.

FIG. 9 shows a conventional coupling structure for attaching such a synthetic resin part to a part to be mounted. Reference numeral 1 denotes a synthetic resin part, and reference numeral 2 denotes a part to be mounted made of a metal member. , A connecting member 3 is rotatably mounted.

The coupling member 3 is made of a synthetic resin material, and is constituted by a head 4, a shaft 5 and a locking portion 6 connected in series, and the head 4 and the shaft 5 are attached to the synthetic resin part 1. It is formed integrally with the synthetic resin part 1 so as to be embedded.

The locking portion 6 of the connecting member 3 extends in a direction perpendicular to the lower end of the shaft portion 5, and the locking portion 6 engages with a locking hole 2 a formed in the mounted component 2. Thereby, the synthetic resin component 1 is attached to the component 2 to be attached.

That is, the component 2 is brought into contact with the mounting surface of the synthetic resin component 1, and the connecting member 3 is rotated in this contact state, so that the locking portion 6 is inserted into the locking hole 2 a of the component 2. By inserting and engaging, the synthetic resin component 1 is attached to the component 2 to be attached.

[0007]

In order to mount the synthetic resin part 1 without rattling by the conventional connecting structure, it is necessary that the locking portion 6 is firmly engaged with the locking hole 2a. For this purpose, the joining member 3 is required to have a high degree of dimensional accuracy, and there is a problem that the production of the joining member 3 becomes difficult.

Further, even when manufactured according to such dimensional accuracy, since the coefficient of thermal expansion between the synthetic resin part 1 and the metal material of the part to be mounted is different, the temperature change causes the engagement with the locking hole 2a. There is also a problem that the engaging force of the stopping portion 6 is reduced and a gap is formed between them, and the gap rattles and a stable mounting cannot be performed.

The present invention has been made in consideration of such conventional problems, and enables stable mounting without rattling, thereby eliminating the need for high dimensional accuracy.
An object of the present invention is to provide a mounting structure for a synthetic resin component that is easy to manufacture.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a connecting member is integrally formed so as to be rotatable with respect to a synthetic resin component, and a rotating shaft of the connecting member is provided. And a locking piece that is inclined is formed integrally with the coupling member so as to protrude, and the coupling piece can be rotated to insert and engage the locking piece into a locking hole of the mounted component. I do.

According to a second aspect of the present invention, there is provided the connecting structure according to the first aspect, wherein the synthetic resin component and the connecting member are formed of incompatible synthetic resin materials.

According to a third aspect of the present invention, there is provided the coupling structure according to the second aspect, wherein the synthetic resin component and the coupling member are formed by two-color molding.

According to a fourth aspect of the present invention, there is provided the mounting structure according to any one of the first to third aspects, wherein the part to be mounted is made of a metal part.

According to a fifth aspect of the present invention, in the mounting structure according to the fourth aspect, the metal component is a vehicle body panel and the synthetic resin component is a cover panel covering the vehicle body panel. I do.

The invention of claim 6 is the invention of claim 4 or claim 5.
Wherein the metal component is a cowl top panel of an automobile, and the synthetic resin component is a cowl top cover.

[0016]

According to the first aspect of the present invention, by rotating the connecting member, the locking piece is inserted into the locking hole of the mounted component and engaged therewith. Attached to the attachment parts. In this mounting state, since the locking piece is inclined with respect to the rotation axis of the coupling member, the component force of the engaging force of the locking piece acts in a direction in which the synthetic resin component and the component to be mounted come into contact with each other. . That is, the inclined locking piece acts in the same manner as the wedge, and the synthetic resin component and the component to be mounted are firmly fastened to be connected, so that a loose connection can be achieved.

Further, since the locking piece performs a wedge action, a firmly tightened state can be maintained even if the amount of thermal expansion between the component to be attached and the coupling member is different. Therefore, a high degree of dimensional accuracy is not required, stable mounting is possible, and manufacturing is simplified.

According to the second aspect of the present invention, since the synthetic resin component and the connecting member are formed of incompatible synthetic resin materials, they are separated from each other at the interface. For this reason, the rotation of the coupling member can be satisfactorily and reliably performed.

According to the third aspect of the present invention, since the molding is performed by two-color molding, it is easy to integrate the connecting member with the synthetic resin part.

According to the fourth aspect of the present invention, since the component to be mounted on which the synthetic resin component is mounted is a metal member, it can be firmly mounted.

According to the fifth aspect of the present invention, the above-described strong connection can be applied to the parts of the automobile, and the attachment of the automobile parts can be easily performed.

According to the invention of claim 6, the cowl top cover can be firmly and stably attached to the cowl top panel which is a metal part.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a cowl top cover of an automobile will be described below with reference to FIGS. FIG. 1 shows the arrangement of a cowl top cover 7 as a synthetic resin component on an automobile, which is arranged between a rear portion of a front hood 8 and a lower portion of a front window panel 9.

The cowl top cover 7 is entirely formed of a synthetic resin material. As shown in FIGS. 3 and 4, a wiper shaft insertion hole 11 and an outside air introduction slit 12 are formed in a horizontally long main body 10. It is constituted by being done.

The front end portion of the main body 10 (the front hood 8
Side) is a flat plate portion 13 curved along the shape of the vehicle body, and a seal lip 14 made of a soft synthetic resin is fitted to a rear end portion of the main body portion 10 (front window panel 9 side). .

FIG. 2 shows a vehicle body structure of a portion where the cowl top cover 7 is mounted. A cowl lower panel 16 is mounted on a dash panel 15 and a cowl lower panel 16 is mounted.
A cowl top panel 17 as a part to be mounted is mounted thereon.

The cowl top panel 17 is made of a metal part, and the cowl top cover 7 made of a synthetic resin material is attached to the cowl top panel 17. The cowl top cover 7 covers the cowl top panel 17 by this attachment. I have.

The coupling of the cowl top cover 7 to the cowl top panel 17 is performed by a coupling member 18 as shown in FIGS.

The coupling member 18 is integrally attached to the cowl top cover 7, as shown in FIG. The coupling member 18 includes a head portion 19 and a shaft portion 20 provided continuously below the head portion 19.
Are continuously provided.

The coupling member 18 is formed of a synthetic resin material, but a synthetic resin which is not compatible with the synthetic resin material forming the cowl top cover 7 and has a high strength is used. For example, when the cowl top cover 17 is formed of a polyolefin resin such as polyethylene or polypropylene, a polyethylene terephthalate resin (PET resin), a nylon resin, or a synthetic resin obtained by mixing these with glass fibers is used as the bonding member. You.

The head 19 and the shaft 20 of the connecting member 18
The cowl top cover 7 is embedded in the flat plate portion 13 and is rotatable when embedded in the cowl top cover 7. Reference numeral 23 denotes a rotation shaft serving as a rotation center at which the connecting member 18 rotates with respect to the cowl top cover 7. A tool groove 22 is formed on the upper surface of the head 19 of the connecting member 18, and a tool such as a screwdriver is inserted into the tool groove 22 so that the whole of the connecting member 18 rotates about the rotation shaft 23. I do.

An engaging piece 2 provided continuously below the shaft portion 20
1 projects so as to extend outward from the shaft portion 20. The locking piece 21 engages with the cowl top panel 17, and the cowl top panel 17 has a locking hole 24 into which the locking piece 21 is inserted and engaged. When the locking pieces 21 are engaged with the locking holes 24, the cowl top cover 7 is attached to the cowl top panel 17.
And attached to it.

The locking piece 21 is inclined with respect to the rotation shaft 23 and is connected to the shaft portion 20. That is, the locking piece 2
1 is a rotation shaft 2 at an angle in the range of 0 ° or more and less than 90 ° without being orthogonal or coaxial with the rotation shaft 23.
Crosses 3

In this embodiment, the cowl top cover 7
Is put on the cowl top panel 17, and the connecting member 18 is turned around the turning shaft 23 using a tool. By this rotation, the locking piece 21 is moved to the locking hole 2 of the cowl top panel 17.
4 and engage.

Since the locking piece 21 is inclined with respect to the rotation axis 23, the engaging force of the locking piece 21 is a component force in the direction along the rotation axis 23 and the direction orthogonal to the rotation axis 23. Acts as a component force. And the component force in the direction along the rotating shaft 23 is
Acts to couple the cowl top cover 7 to the cowl top panel 17. That is, since the locking pieces 23 operate in the same manner as the wedges, the cowl top cover 7 is firmly fastened to the cowl top panel 17. Therefore, the cowl top cover 7 can be attached without rattling.

Further, since the locking piece 21 performs a wedge action, a strong tightening state can be maintained even if the amount of thermal expansion between the cowl top panel 17 and the connecting member 18 is different. For this reason, the coupling member 18 does not require a high degree of dimensional accuracy, can be stably mounted, and can be easily manufactured.

The above-described cowl top cover 7 and coupling member 1
8 can be integrally formed of a two-color synthetic resin material. In this production, a synthetic resin for molding a cowl top cover, for example, a polypropylene resin is melted in one injection device, and a synthetic resin incompatible with the synthetic resin for the cowl top cover in another injection device, for example, PET mixed with glass fiber. Let the resin melt. Then, the synthetic resin material is injected into a cavity for molding the cowl top cover. In this molding, a hole is formed in a portion corresponding to the coupling member 18. Next, a part of the mold is replaced to form a cavity corresponding to the coupling member 18, and a synthetic resin material for the coupling member is injected. Then, after the hardening of the synthetic resin material, the cowl top cover and the connecting member, in which the connecting member is rotatable, can be integrally formed by taking out from the mold.

FIG. 6 shows a mold used in another manufacturing method for integrally manufacturing the cowl top cover 7 and the connecting member 18. In this mold 25, a molding cavity 28 is formed by the fixed mold 26 and the movable mold 27 facing each other. Also, between the fixed mold 26 and the movable mold 27, a nest 29 for forming the locking piece 21 of the inclined coupling member 18 is sandwiched. The insert 29 moves in a direction perpendicular to the direction of clamping the fixed mold 26 and the movable mold 27. Reference numeral 30 denotes a gate for injecting the molten synthetic resin into the cavity 28.

Prior to using such a mold 25, the cowl top cover 7 is formed of a polypropylene resin or the like so as to have a cavity 31 having a shape corresponding to the head portion 19 and the shaft portion 20 of the coupling member 18. And FIG.
Is sandwiched between the fixed mold 26 and the movable mold 27, and the nest 29 is advanced. In this state, a synthetic resin material that is not compatible with the cowl top cover 7, for example, PE mixed with 25% by weight of glass fiber.
The T resin is injected from the gate 30, cured, and taken out of the mold 25. Thereby, the cowl top cover 7 and the coupling member 18 are integrated, and a molded body in which the coupling member 18 is rotatable can be formed.

It is to be noted that, besides this molding, it is also possible to form the coupling member 18 and then form the cowl top cover 7 by setting the coupling member 18 in a mold and molding them together. .

FIG. 7 shows another embodiment of the present invention, in which the connecting member 17 is formed integrally and rotatable with the cowl top cover 7 in an inclined state. Also in this case, the locking piece 21 performs the wedge action in the same manner as described above by inclining the rotation shaft 23, so that the cowl top cover 7 and the cowl top panel 17 can be joined without play.

FIG. 8 shows another embodiment of the connecting member 18.
A boss 32 protrudes from the head 19. By directly gripping the boss 32 with a finger, the coupling member 18 can be rotated. For this reason, the connection which does not require a tool becomes possible, and operability is improved.

According to the present invention, an automobile part formed of a synthetic resin other than the cowl top cover 7, for example, an instrument panel, a rear parcel tray, a luggage finisher lid, and the like can be similarly connected to a vehicle body panel. Also, office parts other than automobile parts,
The same can be applied to other components.

[Brief description of the drawings]

FIG. 1 is a front perspective view of an automobile to which an embodiment of the present invention is applied.

FIG. 2 is a sectional view of a cowl top cover mounting structure.

FIG. 3 is a perspective view of a cowl top cover.

FIG. 4 is a partially cutaway perspective view of a cowl top cover mounting structure.

FIG. 5 is a cross-sectional view showing the structure of one embodiment.

FIG. 6 is a cross-sectional view of a mold used for manufacturing one embodiment.

FIG. 7 is a cross-sectional view of another embodiment.

FIG. 8 is a perspective view of another embodiment of the coupling member.

FIG. 9 is a cross-sectional view of a conventional coupling structure.

[Explanation of symbols]

 Reference Signs List 7 cowl top cover 17 cowl top panel 18 connecting member 19 head 20 shaft part 21 locking piece 23 rotation shaft 24 locking hole

Claims (6)

[Claims] 1. A coupling member is integrally formed so as to be rotatable with respect to a synthetic resin component, and a locking piece inclined with a rotation axis of the coupling member is integrally formed in a protruding manner with the coupling member. ,
A mounting structure for a synthetic resin component, characterized in that the coupling member can be rotated to insert and engage a locking piece into a locking hole of a component to be mounted. 2. The mounting structure according to claim 1, wherein the synthetic resin component and the coupling member are formed of an incompatible synthetic resin material. 3. The mounting structure according to claim 2, wherein the synthetic resin component and the coupling member are formed by two-color molding. 4. The mounting structure for a synthetic resin component according to claim 1, wherein the mounted component is made of a metal component. 5. The mounting structure according to claim 4, wherein the metal part is a vehicle body panel and the synthetic resin part is a cover panel covering the vehicle body panel. Mounting structure. 6. The mounting structure according to claim 4, wherein the metal component is a cowl top panel of an automobile, and the synthetic resin component is a cowl top cover. Parts mounting structure.