JP2006214479A - Fitting structure for resin member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increasing fitting force in spite of low insertion load in a fitting structure for a resin member. <P>SOLUTION: A claw part 16 of a first member 12 is inserted and fitted in a fitting hole 14A of an object 14 to be attached and a wedge part 30 of a second member 22 is inserted and fitted in the claw part 16. Consequently, fitting force of the claw part 16 to the fitting hole 14A can be increased without increasing each insertion load and the first member 12 and the second member 22 can be strongly fitted to the object 14 to be attached. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a resin member fitting structure, and particularly to a resin member fitting structure having a low fitting load and a high fitting force.

As a fitting structure for fitting resin parts to each other without using screws, there is a resin part fixing structure disclosed in Patent Document 1, for example. This is provided with a boss part on one member and a through hole and a fitting part on the other member. When the boss part is inserted into the through hole and fitted with the fitting part, the two parts are It is comprised so that it may mutually be fixed.
Utility model registration No. 3068533

  However, in the above-described conventional example, the locking plate is configured to be fitted to the boss portion by the elasticity of the thin portion, so that a manufacturing error is large, or the thin portion is deteriorated with time, and the elasticity is weak. The resin may creep or deform at a high temperature, which may cause rattling in the fitting state between the fitting portion and the boss portion, which may cause abnormal noise.

  In addition, in the resin member fitting structure, generally, there is a relationship that, if an attempt is made to increase the holding force (fitting force) in the fitted state, the insertion load necessary for fitting the parts together also increases. On the contrary, when the insertion load is reduced, the fitting force is also reduced.

  In view of the above facts, an object of the present invention is to increase the fitting force even with a low insertion load in the resin member fitting structure.

  The invention according to claim 1 is configured such that a first member integrally having a claw portion configured to be fitted in a fitting hole formed in an object to be attached, and configured to be able to be inserted into the first member, And a second member integrally including a wedge portion that elastically deforms the claw portion in a direction in which the fitting force between the claw portion and the fitting hole is increased by engaging with the portion.

  In the resin member fitting structure according to claim 1, the first member and the second member are fitted and attached (fixed) to the attachment object by the claw portion of the first member and the wedge portion of the second member. Can do.

  Moreover, although the insertion load of each of the first member and the second member is small, the claw portion of the first member is fitted into the fitting hole of the attachment object, and the wedge portion of the second member is further fitted into the claw portion. Thereby, the fitting force of the nail | claw part with respect to a fitting hole can be raised, and the 1st member and the 2nd member can be strongly fitted and attached with respect to an attachment target object.

  According to a second aspect of the present invention, in the resin member fitting structure according to the first aspect, the claw portion is formed in a pair of plates facing each other with a predetermined interval in a natural state, and the wedge portion is formed of the claw In the engaged state with the part, the claw part is elastically expanded to increase the fitting force between the claw part and the fitting hole.

  In the resin member fitting structure according to claim 2, the claw portion that is in a fitted state with the fitting hole only by being inserted into the fitting hole is elastically expanded by the wedge portion, thereby The fitting force between the portion and the fitting hole can be further increased.

  Further, when the claw portion and the wedge portion are engaged, the claw portion prevents the wedge portion from being pulled out, so that the wedge portion does not unintentionally leave the claw portion.

  The wedge portion has, for example, a maximum thickness so that the wedge portion can be detached from the claw portion without breaking the claw portion when it becomes necessary to disassemble the component for reuse or the like. It is preferable to provide a tapered portion whose thickness gradually decreases from the portion toward the base side, and to engage the claw portion and the wedge portion at a position where the maximum thickness portion passes the claw portion.

  According to a third aspect of the present invention, in the resin member fitting structure according to the first or second aspect, the first member and the second member are each formed with an engaging portion for preventing mutual displacement. It is characterized by being.

  In the resin member fitting structure according to claim 3, since the claw portion and the wedge portion are positioned by the engaging portion, the fitting state is stable, and the generation of rattling and abnormal noise is more effective. Can be prevented.

  According to a fourth aspect of the present invention, in the resin member fitting structure according to any one of the first to third aspects, the one or both of the first member and the second member may include the first member. When the first member and the second member are removed from the attachment object, a removal assisting means for easily releasing the engagement state between the wedge portion and the claw portion is provided.

  The removal assisting means is, for example, a recess for inserting a flathead screwdriver (not shown), and the wedge portion can be detached from the claw portion by inserting and rotating the flathead screwdriver.

  The configuration of the removal assisting means is not particularly limited as long as it is useful for detaching the wedge portion from the claw portion. For example, when a specific operation is performed, the claw portion expands and the engagement with the wedge portion is released. You may be made to do.

  In the resin member fitting structure according to claim 4, by using the removal assisting means, the first member and the second member can be easily detached from the attachment object, facilitating the disassembly work, Parts can be easily reused.

  As described above, according to the resin member fitting structure of the present invention, the resin member fitting structure has an excellent effect that the fitting force can be increased even with a low insertion load.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4, the resin member fitting structure 10 according to the present embodiment includes a first member 12 and a second member 22.

  A claw portion 16 integrally connected to the flat plate portion 18 is formed on the first member 12 so as to protrude into a fitting hole 14 </ b> A formed in the attachment object 14.

  The flat plate portion 18 is configured to abut or approach the mounting target object 14 when fitted to the mounting target object 14. The concave portion 20 and the rising portion are formed on both sides of the claw portion 16 continuously to the flat plate portion 18. 24 is integrally formed. Further, the flat plate portion 18 has a flat portion 28 having a projecting engaging portion 26 following the concave portion 20.

  As for the 1st member 12, the said each part is integrally shape | molded using common resin.

  The flat plate portion 18 is formed with, for example, a rectangular opening 18A, and a claw portion 16 is formed so as to protrude from two opposite sides of the opening 18A.

  As shown in FIG. 2, the claw portions 16 are formed in a pair of plates facing each other with a predetermined interval in a natural state. For example, the intervals are gradually reduced as the distance from the flat plate portion 18 increases.

  A window 16 </ b> A is formed in the claw portion 16. This is because the claw portion 16 itself is used as a leaf spring by appropriately lowering the bending rigidity of the claw portion 16 to facilitate elastic deformation.

  Further, as shown in FIG. 3, one or both of the pair of claw portions 16 is formed with a protruding portion 16B that engages with the fitting hole 14A when the claw portion 16 is fitted with the fitting hole 14A. ing.

  When the protrusion 16B engages with the fitting hole 14A, the pair of claws 16 are elastically deformed in a direction in which the interval between the protrusions 16B is reduced, and the protrusion 16B gets over the fitting hole 14A. Due to the spring force generated by the deformation, the protrusion 16B engages with the fitting hole 14A, and the claw 16 engages with the fitting hole 14A.

  The rising portion 24 is, for example, an L-shaped section formed three-dimensionally in the thickness direction of the flat plate portion 18 on the opposite side of the concave portion 20 across the flat plate portion 18, and is formed by ribs 24A and 24B. It is reinforced.

  The second member 22 is configured to be able to be inserted into the first member 12, and the wedge portion 30 integrally connected to the flat plate portion 32 is formed so as to protrude into the claw portion 16 of the first member 12. Yes.

  The flat plate portion 32 overlaps with the flat plate portion 18 of the first member 12 when fitted to the first member 12, and is continuous with the flat plate portion 32 in the recess 20 of the first member 12. A spring portion 34 having, for example, a substantially V-shaped cross section is formed so as to enter, and following the spring portion 34, a concave engagement toward the first member 12 to engage with the engagement portion 26 of the first member. A flat portion 38 having a portion 36 is formed.

  As for the 2nd member 22, each said part is integrally shape | molded using general resin.

  In the engaged state with the claw portion 16, the wedge portion 30 is a portion that elastically expands the claw portion 16 and increases the fitting force between the claw portion 16 and the fitting hole 14A.

  For example, the wedge portion 30 is provided with a tapered portion 30C whose thickness gradually decreases from the maximum thickness portion 30A toward the root side, and a thin portion 30B is formed continuously on the root side of the taper portion 30C.

  As shown in FIGS. 1 and 2, the tip end side of the maximum thickness portion 30 </ b> A in the wedge portion 30 is also tapered so that the thickness gradually decreases. The maximum thickness portion 30 </ b> A is configured to pass through the claw portion 16 by elastically expanding the claw portion 16.

  The engaging portions 26 and 36 are for fitting the first member 12 and the second member 22 in a state where the first member 12 and the second member 22 are fitted to prevent the first member 12 and the second member 22 from being displaced.

  The second member 22 is formed with a removal assisting means 40 that facilitates releasing the engagement state between the wedge portion 30 and the claw portion 16 when the first member 12 and the second member 22 are removed from the attachment object 14. Yes.

  The removal assisting means 40 is a gap formed between the second member 22 in a state in which a part of the flat plate portion 32 is bent in a U shape and the second member 22 is fitted and adhered to the first member. It is formed so that the tip of the minus driver D can be inserted.

  The wedge part 30 can be forcibly detached from the claw part 16 by inserting the tip of the minus driver D and rotating it in the direction of the arrow R, for example.

  Note that the removal assisting means 40 is not limited to the above-described configuration, and has a configuration in which, for example, the claw portions 16 are expanded so that the engagement with the wedge portion 30 is released when a specific operation is performed. There may be.

As shown in FIGS. 5 and 6, the fitting structure 10 according to the present embodiment is formed integrally with a front panel 42 and a rear panel 44 that constitute a defroster nozzle 46 of an automobile, for example. In this case, the attachment object 14 is, for example, a defroster nozzle attachment portion provided on a vehicle frame.
(Function)
5 and 6, when the front panel 42 and the rear panel 44 are collectively attached to the attachment object 14, the front panel 42 and the rear panel 44 are combined to form the defroster nozzle 46.

  To explain step by step, first, when the claw portion 16 of the first member 12 related to the rear panel 44 is inserted into the fitting hole 14A of the attachment object 14, the pair of claw portions 16 are pushed by the fitting hole 14A and each other. Elastically deforms in the direction of decreasing distance.

  When the protrusion 16B of the claw portion 16 gets over the fitting hole 14A, the protrusion 16B is engaged with the fitting hole 14A by the spring force of the claw portion 16 caused by elastic deformation, and the first member is inserted. 12 is attached to the attachment object 14.

  Next, as shown in FIGS. 3 and 4, the engaging portion 36 of the second member 22 connected to the front panel 42 is changed to the engaging portion 26 of the first member 12 connected to the rear panel 44. When the plane portions 28 and 38 are overlapped with each other, the first member 12 and the second member 22 (the front panel 42 and the rear panel 44) are positioned.

  At this time, as shown in FIG. 3, the second member 22 is elastically deformed in the spring portion 34, and the engaging portions 26 and 36 are engaged before the wedge portion 30 is engaged with the claw portion 16. Positioning. Therefore, assembly workability can be improved.

  Here, when the wedge part 30 is inserted between the claw parts 16 in the direction of the arrow I, the wedge part 30 is inserted between the claw parts 16 while the claw parts 16 are elastically expanded. When the thick portion 30A passes the tip of the claw portion 16, the claw portion 16 is engaged with the tapered portion 30C, and the flat plate portion 32 of the second member 22 contacts the flat plate portion 18 of the first member 12. .

  The claw portion 16 is fixed in a state of being elastically expanded by the wedge portion 30, whereby the projection portion 16 </ b> B of the claw portion 16 is more firmly engaged with the fitting hole 14 </ b> A. Since the thickest part 30A of the wedge part 30 passes through the tip of the claw part 16, the wedge part 30 does not unintentionally leave the claw part 16.

  When the front panel 42 and the rear panel 44 are attached to the attachment object 14, the defroster nozzle 46 is assembled at the same time.

  Thus, since the first member 12 and the second member 22 are attached to the attachment object 14 by the claw part 16 and the wedge part 30, the first member 12 and the second member 22 are strengthened with respect to the attachment object 14. Can be fitted and attached.

  The insertion load for inserting the first member 12 into the fitting hole 14A is such a load that elastically deforms the claw 16 until the projection 16B of the pair of plate-like claws 16 gets over the fitting hole 14A. It is sufficient that the insertion load for inserting the second member 22 into the first member 12 is a load that allows the maximum thickness portion 30A of the wedge portion 30 to pass while elastically expanding the claw portion 16. So both are lightly suppressed.

  Although the insertion load of each is low, the front end side of the claw part 16 not restrained by the attachment object 14 is elastically expanded by the wedge part 30, so that the projection part 16B of the claw part 16 and the fitting hole 14A The fitting force between the first member 12 and the attachment member 14 is further increased than when only the first member 12 is fitted to the attachment object 14 (when fitting based only on the spring force of the claw portion 16). Become strong. Since the mounting state is strong, there is no rattling or abnormal noise.

  Since the claw portion 16 and the wedge portion 30 are integrally formed with the first member 12 and the second member 22, respectively, a fitting part for mounting is not required separately, and the number of parts is small. Cost can be lowered.

  Further, as shown in FIG. 4, since the engaging portions 26 and 36 are positioned in the claw portion 16 and the wedge portion 30, they are not displaced from each other in the arrow X direction and the arrow Y direction, and the mounting state is stable. Therefore, it is possible to more effectively prevent rattling and abnormal noise.

  When the defroster nozzle 46 is removed from the vehicle, the tip of the minus driver D is inserted into the removal assisting means 40, and the minus driver D is rotated in the direction of arrow R, for example.

  Since the wedge portion 30 is formed with a tapered portion 30C, the claw portion 16 is elastically expanded as the wedge portion 30 is forcibly pulled out, and the maximum thickness portion 30A is detached from the claw portion 16. .

  Thus, by using the removal assisting means 40, the wedge part 30 can be forcibly detached from the claw part 16 without destroying the claw part 16, so that the defroster nozzle 46 can be easily disassembled. Yes, it is easy to reuse parts.

It is a disassembled perspective view which shows the fitting structure of a resin member. It is 2-2 arrow sectional drawing in FIG. 4 which shows the state by which the fitting structure of the resin member was attached to the attachment target object. FIG. 5 is a cross-sectional view taken along the arrow 3-3 in FIG. 4, showing a state where the resin member fitting structure is attached to an attachment object. It is a perspective view which shows the state by which the fitting structure of the resin member was attached to the attachment target object. It is a disassembled perspective view which shows a defroster nozzle. It is a perspective view which shows a defroster nozzle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Resin member fitting structure 12 1st member 14 Attachment object 14A Fitting hole 16 Claw part 22 2nd member 26 Engagement part 30 Wedge part 36 Engagement part 40 Removal assistance means

Claims (4)

A first member integrally having a claw portion configured to be fitted in a fitting hole formed in an attachment object;
A wedge part that is configured to be insertable into the first member and that elastically deforms the claw part in a direction that engages with the claw part and increases the fitting force between the claw part and the fitting hole is integrally formed. A second member having;
A resin member fitting structure characterized by comprising: The claw portions are formed in a pair of plates facing each other at a predetermined interval in a natural state,
The wedge portion is configured to elastically expand the claw portion in an engaged state with the claw portion and to increase a fitting force between the claw portion and the fitting hole. The resin member fitting structure according to claim 1.   3. The resin member fitting structure according to claim 1, wherein the first member and the second member are each formed with an engaging portion that prevents a positional shift between the first member and the second member. 4.   In one or both of the first member and the second member, when the first member and the second member are removed from the attachment object, the engagement state between the wedge portion and the claw portion is released. The resin member fitting structure according to any one of claims 1 to 3, further comprising a removal assisting means that facilitates the removal.

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