JP2005343284A - Cushioning clip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent or reduce a bounce of a vehicle door in closing operation even when the size of a cushioning part is set to be larger than a prescribed distance dimension. <P>SOLUTION: The cushioning clip 1 receives a movement of a movable member such as the vehicle door at the vicinity of a dead end of a movement process such as the closing operation process. The cushioning clip 1 is equipped with the cushioning part 10 which abuts to the movable member such as vehicle door in an elastically compressed deformable state, and absorbs a movement shock of the movable member, and a mounting part 20 which is integrally provided connecting with the cushioning part 10, and engaged with a mounted member 7 such as the vehicle door frame disposed at the position defining the dead end of the movement process of the movable member. In the cushioning part 10, a first cushioning portion 40 showing a first load deformation characteristic elastically compressedly deformed at the first place and a second cushioning portion 50 showing a harder load deformation characteristic than the first load deformation characteristic by the first cushioning portion 40 are serially disposed when the movable member such as the vehicle door abuts and is elastically compressedly deformed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a buffer clip. For example, the present invention relates to a buffer clip that is attached to a vehicle door frame and softens an impact load applied to the vehicle door frame when the vehicle door is closed.

In order to prevent contact between the vehicle door and the vehicle door frame during the closing operation, it is a common practice to provide a predetermined distance between the two and to place a buffer clip therebetween.
As a conventional example of the above-described buffer clip, there is one provided with a buffer portion and an engaging portion (see FIG. 6 of Patent Document 1). The buffer portion is a truncated cone-shaped member made of an elastic material. The engaging portion is provided with a fitting portion having a cross-sectional umbrella shape. The vehicle door frame has a mounting hole at a portion facing the vehicle door when the vehicle door is closed.
The buffer clip is attached to the vehicle door frame by inserting the buffer clip into the mounting hole from the engagement portion side and hooking the fitting portion on the edge of the back surface of the mounting hole. The mounted buffer portion is arranged on the surface of the vehicle door frame and waits for the vehicle door during the closing operation.
According to this buffer clip, when the vehicle door is closed vigorously, the buffer portion receives the vehicle door that is closer to the vehicle door frame than the predetermined distance dimension. Since the impact load at the time of receiving is absorbed by the elastic deformation of the buffer portion, the impact load transmitted to the vehicle door frame is reduced.
JP 2002-349524 A

However, the above-described buffer clip has a problem that a reaction force generated when the vehicle door hits is large. For this reason, when the vehicle door is slowly closed, the vehicle door is bounced back by the buffer clip, and the vehicle door must be re-engaged by applying momentum.
However, this rebound can be avoided if the vehicle door and the buffer clip in the closed state do not hit each other. That is, the size of the buffer portion in the attached state may be the same as or smaller than the above-described distance dimension.

However, if the buffer portion is made smaller than the above-described distance dimension, a gap is generated between the vehicle door and the vehicle door frame in the closed state. In this case, since there is no member that supports the vehicle door from the vehicle door frame side, the vehicle door is rattled by vibration during vehicle travel.
Even if the distance dimension and the size of the buffer portion are set to be the same, the distance dimension may actually become smaller due to a manufacturing error, resulting in the same problem.
Accordingly, when the size of the buffer portion that avoids the above-mentioned problems is determined in consideration of manufacturing errors, it must be made larger than the above-mentioned interval dimension. For this reason, in the actual manufactured product, when the vehicle door is closed slowly, the vehicle door is bounced back to the buffer clip.
The present invention has been devised in view of the above points. That is, the problem to be solved by the present invention is to form a shock absorber in a portion having different load deformation characteristics, so that even when the size of the shock absorber is larger than the above-described distance dimension, the vehicle is in a closing operation. The object is to prevent or reduce the bounce of the door.

In order to solve the above problems, each invention of the present invention takes the following means.
First, a buffer clip according to a first aspect of the present invention is a buffer clip for receiving the movement of a movable member such as a vehicle door near the end of a moving process such as a closing operation process. A shock absorber that contacts the elastically deformable state and absorbs the moving impact of the movable member, and a vehicle door that is integrally connected to the shock absorber and is disposed at a position that defines the end of the moving step of the movable member. A first load deformation characteristic that is elastically deformed first when a movable member such as a vehicle door comes into contact with and elastically deforms when the movable member abuts on a movable member such as a frame. And a second buffer portion exhibiting a load deformation characteristic harder than the first load deformation characteristic of the first buffer portion are arranged in series.

In the first aspect of the present invention, the buffer portion elastically compresses and absorbs a load (hereinafter referred to as an impact load) due to an impact (moving impact) applied from the moving direction of the movable member in the same direction. For this reason, the reaction force of the buffer clip with respect to the received impact load is reduced.
At this time, after the first buffer portion is compressed and deformed, the second buffer portion that exhibits a harder load deformation characteristic than the first load deformation characteristic of the first buffer portion is compressed and deformed.
The degree of compressive deformation of the buffer portion is determined according to the load deformation characteristics of each buffer portion. For this reason, the compression degree of the 2nd buffer part which has a harder load deformation characteristic becomes a thing smaller than a 1st buffer part. Therefore, the reaction force of the buffer clip is greater when the second buffer portion is compressed and deformed than when the first buffer portion is compressively deformed.

Next, the buffer clip according to the second invention is the buffer clip according to the first invention, wherein the first buffer part has a cylindrical shape, and the cylindrical wall surface constituting the first buffer part is a vehicle. It is formed thinner than the second buffer portion so as to bend and deform in the radial direction in response to the pressure from the direction in which the movable member such as the door is moved.
In the second aspect of the invention, the impact load is absorbed by being converted into a bending deformation in the radial direction of the cylindrical wall surface formed thinner than the second buffer portion.

Next, the buffer clip according to the third invention is the buffer clip according to the first invention or the second invention, wherein the first buffer portion is in a direction orthogonal to the direction in which the movable member such as the vehicle door moves. A through-hole is formed.
In this 3rd invention, a wall surface part is formed in the side position of a hole part by forming the hole part penetrated in the direction orthogonal to the direction which a movable member moves to a buffer part. The wall surface portion absorbs the impact load received by bending deformation in the outward direction.

Next, a buffer clip according to a fourth invention is the buffer clip according to any of the first to third inventions, wherein the buffer clip abuts and supports a movable member such as a vehicle door. The buffer part is arrange | positioned between the support part and the attaching part.
In the fourth invention, the movable member in the moving state first comes into contact with the support portion.

Next, a buffer clip according to a fifth invention is the buffer clip according to any one of the first to fourth inventions, wherein the buffer part is formed of an elastomer, and the attachment part is more rigid than the buffer part. It is made of high resin.
In the fifth aspect of the invention, the buffer clip receives the impact load from the movable member by the buffer portion made of elastomer. Then, the buffer clip is attached to the vehicle door frame by the mounting portion made of a resin having higher rigidity than the buffer portion.

Next, a buffer clip according to a sixth aspect of the present invention is the mounting structure of the buffer clip according to any of the first to fifth aspects of the present invention, and a position that determines the end of the moving process of a movable member such as a vehicle door The shock-absorbing clip, which is attached by engaging with a mounted member such as a vehicle door frame, is arranged in a state overlapping with the movable range of the movable member when the movable member is in the closed state. The state is absorbed as an elastic compressive deformation of the first buffer portion of the buffer clip.
In the sixth aspect of the invention, the buffer clip is attached to the attached member so as to overlap the movable range of the movable member. This overlapping buffer clip portion is absorbed by elastically compressing and deforming when the first buffer portion of the buffer clip is closed.

According to the present invention described above, the following effects can be obtained.
First, according to the first aspect of the invention, the shock absorber elastically compresses and absorbs the impact load in the same direction as the direction in which the movable member moves. For this reason, the reaction force of the buffer clip with respect to the impact load can be suppressed.
Further, the reaction force of the buffer clip is greater when the second buffer portion is compressed and deformed than when the first buffer portion is compressively deformed. For this reason, the buffer clip can support the movable member with a larger reaction force as the movable member approaches the attached member than the predetermined interval dimension.

Next, according to the second aspect of the invention, the impact load is absorbed by being converted into a bending deformation in the radial direction of the first buffer portion. For this reason, the reaction force of the buffer clip with respect to the received impact load is suppressed.
Next, according to the third invention, by forming the hole portion penetrating in the direction orthogonal to the direction in which the movable member moves, the wall surface portion for converting and absorbing the received impact load can be more easily formed.
Next, according to the fourth invention, since the movable member in the moving state first comes into contact with the support portion, it is possible to reduce the impact at the time of contact that the first buffer portion receives. For this reason, it is possible to reduce or prevent the breakage of the buffer clip caused by the impact at the time of contact.
Next, according to the fifth aspect of the present invention, it is possible to exert a compression action on the buffer portion by utilizing the elasticity inherent in the elastomer. And since a buffer clip is attached to a to-be-attached member by the resin-made attachment part, the attachment intensity | strength of the conventional resin-made buffer clip is maintained.

  Next, according to the sixth invention, the buffer clip portion that overlaps the movable range of the movable member is absorbed by the compression deformation of the first buffer portion of the buffer clip. Can be bigger. For this reason, the movable member and the buffer clip in the closed state are kept in contact with each other, and rattling of the movable member in the closed state can be prevented or reduced.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a buffer clip. FIG. 2 is a diagram showing the relationship between the amount of lap between the vehicle door and the buffer clip and the reaction force generated in the buffer clip in the closed state.

The buffer clip 1 according to the first embodiment is a cylindrical member including a buffer portion 10 and a mounting portion 20. The buffer clip 1 is attached to the attachment hole 7 formed in the vehicle door frame 5 using the attachment portion 20. A buffer portion 10 is disposed between the vehicle door frame 5 and the vehicle door (not shown).
The mounting height dimension of the buffer clip 1 in the mounted state is larger than a predetermined distance dimension between the vehicle door frame 5 and the vehicle door. Therefore, the buffer clip 1 in the attached state is in a state of being elastically compressed and deformed by the vehicle door in the closed state. That is, the vehicle door and the buffer clip 1 in the closed state overlap (wrap).
Hereinafter, each component will be described.

The buffer portion 10 in FIG. 1 is an approximately frustoconical elastomer member, and includes a support portion 30, a first buffer portion 40, and a second buffer portion 50. From the support part 30 to the first buffer part 40 and further to the second buffer part 50, the diameter of the buffer part 10 increases and becomes thick. The buffer 10 itself is bent and deformed by the elasticity inherent in the elastomer.
The support part 30 is a ring-shaped member and forms an upper part of the buffer clip 1 as viewed in FIG. The support portion 30 is provided with four ribs 31 for reinforcement at intervals of approximately 90 degrees. The rib 31 is a plate member having a substantially L-shaped cross section, and is formed with one end thereof facing inward of the cylinder.
As shown in FIG. 1, a first buffer portion 40 is formed at a lower position of the support portion 30.

The first buffer portion 40 includes a through hole 41 and a buffer wall 42. The through hole 41 is a substantially rectangular hole formed through the first buffer portion 40 from the near side to the back side as seen in FIG. In addition, buffer walls 42 and 42 are formed at positions on both sides of the through hole 41. The outer surfaces of the buffer walls 42 and 42 form a part of the outer shape of the buffer portion 10.
The through-hole 41 is formed long in the width direction of the buffer clip 1 as shown in FIG. For this reason, the buffer walls 42 and 42 formed at both side positions (left and right positions as viewed in FIG. 1) of the through hole 41 are thinner than the second buffer portion 50. Therefore, the buffer walls 42 and 42 that have received an impact load from above and below as viewed in FIG. 1 are deformed by bending outward in the radial direction of the first buffer portion 40 as compared with the second buffer portion 50 described later. It is easy to do.
A second buffer portion 50 is further formed at a lower position of the first buffer portion 40.

The second buffer portion 50 is a substantially cylindrical member. As described above, the second buffer portion 50 has a larger diameter and a larger thickness than the first buffer portion 40 as described above.
A mounting portion 20 is connected to a position below the second buffer portion 50.

The mounting portion 20 in FIG. 1 is a cylindrical member and includes a flange portion 21 and a locking portion 22. The mounting portion 20 is formed of a resin having higher rigidity than the above-described buffer portion 10.
The flange portion 21 is a portion formed by projecting the bottom surface portion of the mounting portion 20 outward in the radial direction. The flange portion 21 has a size that covers at least the mounting hole 7.
The locking portion 22 is a substantially cylindrical member provided on the bottom surface portion 21 a of the mounting portion 20. The diameter of the locking part 22 is large enough to fit into the mounting hole 7. The locking part 22 has an engaging claw 23 on its side.
The engaging claw 23 is a leaf spring member formed by cutting out a side portion of the engaging claw 23. The engaging claw 23 protrudes outward from the side of the mounting portion 20 and projects, and is provided with a spring action that can be independently deformed radially outward. In FIG. 1, only the engaging claw 23 on the front side appears, but an engaging claw 23 (not shown) is also provided on the back side.

Next, a mounting method and a buffering operation of the buffer clip 1 will be described with reference to FIG.
First, the buffer clip 1 is inserted into the mounting hole 7 from the mounting portion 20 side, and is pushed in until the engaging claws 23 and 23 are engaged with the edge of the back side surface 5b of the mounting hole 7. In this state, the flange portion 21 is engaged with the edge of the front side surface 5a of the mounting hole 7 at the protruding portion. The buffer clip 1 is attached to the vehicle door frame 5 by holding the vehicle door frame 5 from the thickness direction using the flange portion 21 and the engaging claw 23.
The buffer clip 1 in the attached state is disposed in a state where the buffer portion 10 side is exposed to the front side surface 5a of the vehicle door frame 5. Further, the buffer portion 10 in the same state is arranged in the order of the first buffer portion 40 and the second buffer portion 50 with the support portion 30 facing up in FIG. 1 so that the vehicle door faces the support portion 30 side. It will be exposed to the front side surface 5a of the door frame 5.

  First, the support portion 30 of the buffer clip 1 comes into contact with the vehicle door at the end of the closing operation. Then, an impact load applied from the vehicle door moving direction (from the top to the bottom as viewed in FIG. 1) is applied to the first buffer portion 40 through the support portion 30. The two buffer walls 42 constituting the first buffer portion 40 are bent and deformed outward in the radial direction of the buffer portion 10 by the received impact load. As a result, the first buffer portion 40 is compressed in the downward direction in FIG. And after the 1st buffer part 40 compresses, the 2nd buffer part 50 with higher rigidity is compressed.

Next, the buffering action of the buffer clip 1 will be described with reference to FIG. [Δ] in FIG. 2 indicates the value of the buffer clip 1 according to the present embodiment. [●] indicates the value of a conventional buffer clip.
First, the lap amount (mm) in FIG. 2 refers to the cylinder height (mm) of the buffer clip 1 that overlaps (wraps) with the vehicle door during the closing operation. In FIG. 2, the lap amount is 0.0 mm when the vehicle door and each buffer clip first contact each other during the closing operation.
The buffer clip 1 according to the present embodiment is attached to the vehicle door frame 5 so as to wrap 1.5 mm with the vehicle door in the closed state.
Further, a conventional buffer clip attached to the vehicle door frame 5 in a closed state and a lap amount of 0.0 mm was used as a comparative example. That is, the conventional buffer clip is designed so as to be in contact with the vehicle door in the closed state (zero gap design). Therefore, in FIG. 2, until the vehicle door is closed (until the lap amount becomes 1.5 mm when viewed with the buffer clip 1), the conventional buffer clip and the vehicle door do not contact each other and no reaction force is generated. Become.

  First, due to the first load deformation characteristic of the first buffer portion 40, the buffer clip 1 has a reduced reaction force from the time of contact (wrap amount 0.0 mm) to the closed state (wrap amount 1.5 mm). . In other words, the slope of the [lap amount × reaction force] curve is smaller than that of the conventional buffer clip. That is, the reaction force of the buffer clip 1 in the closed state (lapping amount 1.5 mm) is 25 to 30N. On the other hand, if the conventional buffer clip is attached to the vehicle door frame 5 so as to wrap 1.5 mm, the reaction force in the same state is about 60 N.

  Further, when the vehicle door is closer to the vehicle door frame 5 than in the closed state (lap amount> 1.5 mm), the second load deformation characteristic of the second buffer portion 50 causes the conventional buffer clip and It becomes the reaction force of the same value. That is, the slope of the [lap amount × reaction force] curve overlaps with the conventional buffer clip.

Next, the function and effect of the buffer clip 1 will be described.
First, according to the first aspect of the invention, the impact load of the vehicle door applied downward as viewed in FIG. 1 is converted into the bending deformation in the radial direction of the first buffer portion 40 and absorbed. For this reason, the reaction force of the buffer clip 1 with respect to the impact load can be suppressed. As a result, even when the vehicle door is closed slowly, it is possible to prevent or reduce the bounce of the vehicle door caused by the reaction force.
In addition, since the vehicle door and the buffer clip 1 in the closed state are kept in contact with each other, rattling of the vehicle door in the closed state can be prevented or reduced as usual.
Further, the reaction force of the buffer clip 1 is larger when the second buffer portion 50 is compressed and deformed than when the first buffer portion 40 is compressed and deformed. For this reason, the buffer clip 1 can support the vehicle door with a larger reaction force as usual as the vehicle door approaches the vehicle door frame 5 than a predetermined interval dimension.

Next, by forming a through hole 41 that penetrates in a direction orthogonal to the direction in which the vehicle door moves, a wall surface portion that converts and absorbs the received impact load is more easily formed.
Further, since the vehicle door in the moving state first comes into contact with the support portion 30, it is possible to reduce the impact at the time of contact that the first buffer portion 40 receives. For this reason, it is possible to reduce or prevent breakage of the buffer clip 1 caused by the impact at the time of contact.
Moreover, each load deformation characteristic of the buffer part 10 can be exhibited using the elasticity which an elastomer originally has. Since the buffer clip 1 is attached to the vehicle door frame 5 by the resin mounting portion 20, the mounting strength of the resin buffer clip 1 can be maintained as usual.

  The “elastomer” used in the buffer portion 10 is a polymer having rubber elasticity at room temperature. For example, styrene elastomer (SBC), olefin elastomer (TPO), PVC elastomer (TPVC), urethane elastomer (TPU), polyester elastomer (TPEE), polyamide elastomer (TPAE), fluorine elastomer, chlorination There are cross-linked ethylene copolymer alloy (Alcrine) and chlorinated polyethylene (CPE). The above-mentioned elastomers may be used alone or in combination of two or more.

  Examples of the “resin” used in the mounting portion 20 include polypropylene, polyacetal (POM), polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyethylene, polystyrene, polyamide, polyvinyl acetate, acrylonitrile = styrene copolymer. Thermosetting resins such as (AS), acrylonitrile = butadiene = styrene copolymer (ABS), phenolic resin, epoxy resin, unsaturated polyester resin, urea resin, melamine resin, polyurethane resin, silicone resin, etc. is there. The above resins may be used alone or in combination of two or more.

[Other embodiments]
The buffer clip 1 according to the present invention is not limited to the above-described embodiment, and can take other various embodiments.
First, the 1st buffer part 40 and the 2nd buffer part 50 should just be arrange | positioned in series. That is, the second buffer part 50 may be arranged next to the support part 30, and the first buffer part 40 may be arranged next.
The buffer unit 10 may be composed of a first buffer part 40 and a second buffer part 50.
Further, only the first buffer portion 40 may be cylindrical. For example, the support part 30 may be a dish-shaped member. This is because the rigidity of the support portion 30 is increased. The second buffer portion 50 may be a columnar member filled with resin. This is because the load deformation characteristic becomes harder and the reaction force against the vehicle door increases.
Further, the first buffer portion 40 may not be provided with the through hole 41 but may have a hollow portion therein. In this case, the side wall forming the cavity is bent and deformed. By providing walls on the front side and the back side of the first buffer portion 40 as seen in FIG. 1, the first buffer portion 40 can be structurally reinforced.

Two or more through-holes 41 of the first buffer portion 40 may be formed. For example, two through holes 41 may be provided in parallel from the front side to the back side in FIG. By providing another wall between the through holes 41, the first buffer portion 40 can be structurally reinforced. In addition to the through hole 41 in FIG. 1, a hole penetrating left and right as viewed in FIG. 2 may be provided. By dividing the buffer wall 42 by the holes, the first load deformation characteristic of the first buffer portion 40 is further softened.
Moreover, the shape of the through-hole 41 can take various shapes such as a circle and a polygon as viewed from the front side of FIG. For example, the range of the first buffer portion 40 can be made larger than that of the second buffer portion 50 by making the through-hole 41 a rectangular shape that is long vertically when viewed in FIG.
Further, the support portion 30 can take a known structure that can be engaged with the mounting hole 7. The number of the engaging claws 23 can also be changed as appropriate.

It is a perspective view of a buffer clip. It is the figure which showed the relationship between the amount of laps of the vehicle door at the time of a closed state, and a buffer clip, and the reaction force which arose in the buffer clip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buffer clip 5 Vehicle door frame 5a Front side surface 5b Back side surface 7 Attachment hole 10 Buffer part 20 Attachment part 21 Flange part 21a Bottom part 22 Locking part 23 Engagement claw 30 Support part 31 Rib 40 First buffer part 41 Through Hole 42 Buffer wall 50 Second buffer site

Claims (6)

A buffer clip for receiving movement of a movable member such as a vehicle door near the end of a moving process such as a closing operation process,
A shock absorber that abuts against a movable member such as the vehicle door and elastically deformable and absorbs a moving impact of the movable member;
An attachment portion that is integrally connected to the buffer portion and that engages with a member to be attached such as a vehicle door frame that is disposed at a position that determines the end of the moving step of the movable member;
The buffer portion includes a first buffer portion exhibiting a first load deformation characteristic that first elastically compresses and deforms when a movable member such as the vehicle door contacts and elastically compresses and deforms, and the first buffer A buffering clip, wherein a second buffering part having a load deformation characteristic harder than the first load deformation characteristic by the part is arranged in series. The buffer clip according to claim 1,
The first buffer portion has a cylindrical shape,
The cylindrical wall surface constituting the first buffer portion is thinner than the second buffer portion so as to bend and deform in the radial direction under pressure from the moving direction of the movable member such as the vehicle door. A shock-absorbing clip, characterized in that it is formed. The buffer clip according to claim 1 or 2,
The buffer clip, wherein the first buffer portion is formed with a hole penetrating in a direction orthogonal to a direction in which a movable member such as the vehicle door moves. The buffer clip according to any one of claims 1 to 3,
The buffer clip includes a support portion that abuts and supports a movable member such as the vehicle door,
A buffer clip, wherein the buffer portion is disposed between the support portion and the mounting portion. The buffer clip according to any one of claims 1 to 4,
The buffer portion is formed of an elastomer,
The buffering clip, wherein the attachment part is formed of a resin having higher rigidity than the buffering part. A mounting structure for a buffer clip according to any one of claims 1 to 5,
When the movable member is in a closed state, the buffer clip is engaged with and attached to a member to be attached such as a vehicle door frame disposed at a position that determines the end of a moving process of the movable member such as the vehicle door. A shock absorber clip mounting structure, wherein the shock absorber clip is disposed in a state overlapping with a movable range of the movable member, and the overlap state is absorbed as an elastic compressive deformation of a first buffer portion of the shock clip.

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