WO2012161224A1 - Grommet - Google Patents

Abstract

The grommet (3) is equipped with: a leg part (30) having a plurality of leg pieces (32) that are inserted through a through hole in the panels (4, 6), and a hollow part (31) for accepting a pin (2), the leg part being capable of fastening to the panels (4, 6) by the pin (2) being inserted into the hollow part (31) and spreading the multiple leg pieces (32); and a flange (35) that protrudes around the upper end of the leg part (30). The flange (35) comprises: an opening (34) cut out to lead into a space (31) between the multiple leg pieces (32); a hook (38) provided at one end of the multiple leg pieces (32); and an engaging part (39) that is provided at the other end of the multiple leg pieces (32) and engages with the hook (38).

Description

Grommet

The present invention relates to a grommet that constitutes a clip together with a pin, and particularly relates to a grommet having a hollow leg portion into which a pin is inserted and a flange protruding around the upper end of the leg portion.

9A to 9C show the clip disclosed in Patent Document 1. FIG. The clip 100 includes a pin 102 and a hollow grommet (bush) 103 into which the pin 102 is inserted. The grommet 103 has two semi-cylindrical leg pieces (half bodies) 109A and 109B, a leg part (body part) 109 formed into a hollow shape into which the pin 102 is inserted, and each leg piece 109A and 109B. And a flange portion (flange portion) 110 made of semicircular discs 110A and 110B protruding around the upper end. The leg portion 109 of the grommet 103 is inserted into the through hole provided in the panel or the like, and the leg piece 109A, 109B is expanded by pushing the pin 102 into the leg portion 109, and the pin 102 is inserted. The grommet 103 can be locked to the panel or the like. Further, the leg portion 109 is provided with an opening 113 for receiving the shaft portion 105 of the pin 102 in a direction orthogonal to the axial direction. The leg portion 109 and the collar portion 110 can be expanded outward in the radial direction of the grommet 103 via a hinge portion 114 that is a thin portion provided at a location facing the opening 113.

The pin 102 has a shaft portion 105 accommodated in the hollow portion of the grommet 103 and a flange 106 formed at one end of the shaft portion 105. As shown in FIG. 9A, the protruding portion of the shaft portion 105 includes a narrow-width portion 105A on the distal end side that does not widen the outer diameter of the leg portion 109 when in the non-fastening position or the temporary assembly position, and a fastening position or A wide portion 105B on the flange 106 side that widens the outer diameter of the leg portion 109 when in the full stop position.

Japanese Patent Gazette: Japanese Patent No. 4545711

In the above-mentioned patent document 1, the grommet 103 can handle the clip 100 constituted by these in a temporarily assembled state in which the pin 102 is received from the opening 113. However, in this conventional structure, the legs constituting the leg portion 109 are in a stage before the clip 100 in the temporarily assembled state is inserted into the through-hole of the panel or the like, that is, in the parts management or the transport process after the clip 100 is manufactured. Since the semi-disk-like bodies 110A and 110B constituting the pieces 109A and 109B and the flange portion 110 are always easily expanded in diameter via the hinge portion 114, the pin 102 is inadvertently detached from the grommet 103 and dropped. There is a risk of doing. In addition, since the leg 109 and the flange 110 are expanded and contracted via the hinge part 114, they have versatility with respect to the hole diameter of a through hole such as a panel, but the applicable maximum hole diameter and minimum hole diameter are set. As a result, a load more than necessary is applied to the grommet 103, which causes damage.
Further, since the hinge portion 114 is provided on the inner peripheral side of the flange portion 110, the outer peripheral edges of the semicircular discs 110A and 110B constituting the flange portion 110 collide with each other when the opening 113 is expanded. It becomes easy to be regulated. Furthermore, the leg pieces 109A and 109B constituting the leg portion 109 are not easily bent because they have a two-part configuration.

The purpose of the present invention is excellent in versatility with respect to the hole diameter of the through-hole provided in the panel or the like and the ease of assembly of the pin, and prevents the assembled pin from being inadvertently dropped and handled, and is easy to handle and through-hole. An object of the present invention is to provide a grommet that improves the insertability into a grommet. Other purposes will be clarified in the description below.

The grommet of the present invention has the following feature (1).
(1) It has a plurality of leg pieces to be inserted into the through-holes of the panel and a hollow part for receiving a pin, and the plurality of leg pieces are expanded by the insertion of the pin into the hollow part. Lockable legs,
Projecting around the upper end of the leg, and
The flange portion has an opening cut out so as to communicate with a gap between the plurality of leg pieces, and a hook portion provided at one end of the plurality of leg pieces facing the opening. An engaging portion that is provided at the other end of the plurality of leg pieces and engages with the hook portion so as to keep the opening closed with the hook portion and to be relatively movable by a predetermined distance; ,have.

Further, the grommet of the present invention more preferably has the following features (2) to (6).
(2) The collar portion has a hinge portion provided at a location substantially opposed to the hook portion, and is elastically displaced via the hinge portion so that the opening can be opened and closed.
(3) The said hinge part is provided in the outer peripheral side of the said collar part.

(4) The hook portion and the engagement portion are provided so as to be stacked one above the other.
(5) The hook portion is composed of a flat plate portion thinner than the thickness of the flange portion and a hooking portion erected at the tip of the flat plate portion.
(6) The leg portion includes at least four leg pieces, the flange portion includes a plurality of flange halves provided with the hinge portion interposed therebetween, and the plurality of flange halves are the In a state where the hook portion is engaged with the engaging portion, the hook portion is moved in the diameter reducing direction approaching each other from the diameter expanding mode against the elastic force of the hinge portion.

The grommet according to the present invention has the above feature (1), so that the opening of the opening is prevented by engaging the hook portion with the engaging portion, so that the inadvertent removal of the pin can be eliminated. Furthermore, since the entire shape is determined by temporarily assembling the pin with the hook portion engaged with the engaging portion, a stable and good insertion operation with respect to the through hole such as a panel can be maintained.

Since the grommet of the present invention further has the feature (2) above, the hinge portion provided at a location substantially opposed to the hook portion provides a single point of bending, so the rigidity of other portions can be increased. Elastic displacement can be obtained in a state of maintaining or providing durability.

The grommet according to the present invention further has the feature (3) described above, so that the grommet is restricted when the opening is to be widened as compared with the configuration in which the hinge portion is provided on the inner peripheral side of the collar portion as in Patent Document 1. It is hard to be done and can maintain the appearance.

The grommet according to the present invention further has the feature (4) above, so that the hook portion and the engaging portion are arranged so that the hook portions are stacked one above the other, so that the entire hook portion has the same thickness or height. So that the appearance characteristics can be kept good.

The grommet of the present invention further has the feature (5) above, so that the hook portion is composed of a thin flat plate portion and a latching portion on the flat plate portion, so that it is easily formed integrally with the collar portion and has good moldability. can get.

The grommets of the present invention further have the feature (6) above, so that the leg portions are composed of 4 or more, so that the grommets are easily elastically displaced, and can be inserted into, for example, a through hole of a panel or the like with a low pressing force. In addition, since the hook halves are moved in the diameter-reducing direction against the elastic force of the hinge part in the engaged state of the hook part and the engaging part, for example, as shown in FIG. In this inserted state, the grommet is easily restrained in the hole, so that even if vibration is applied, the grommet is not unintentionally pulled out or lifted up, so that the usability can be improved.

It is the top view which showed the grommet which concerns on the example of a form of this invention by the usage condition. It is a side view of the grommet shown in Drawing 1A. It is the figure which showed the action | operation in the insertion aspect of the said grommet with respect to through-holes, such as a panel, in case the said through-hole is larger diameter than a design value. It is the figure which showed the action | operation in the insertion aspect of the said grommet with respect to through-holes, such as a panel, when the said through-hole is smaller than a design value. It is sectional drawing in the use condition after pushing in the pin from the aspect of FIG. 2A. It is sectional drawing in the use condition after pushing in the pin from the aspect of FIG. 2B. It is the top view which showed the said pin single item. FIG. 4B is a front view of the single pin shown in FIG. 4A. FIG. 4B is a cross-sectional view taken along the line AA of the single pin shown in FIG. 4B. It is the side view seen from the B direction of the pin single article shown in Drawing 4C. It is a front view in the shaping | molding state of the said grommet. It is an operation | movement figure when through-holes, such as a panel, are large diameter in the state which engaged the hook part with the engaging part. It is an operation | movement figure when through-holes, such as a panel, have a small diameter in the state which engaged the hook part with the engaging part. It is CC sectional view taken on the line of FIG. 5A. FIG. 5C is a sectional view taken along line C1-C1 in FIG. 5B. It is the DD sectional view taken on the line of FIG. 5A. FIG. 5D is a sectional view taken along line D1-D1 of FIG. 5B. It is the EE sectional view taken on the line of FIG. 5A. It is the E1-E1 sectional view taken on the line of FIG. 5B. It is a front view which shows the state which assembled | attached the pin to the conventional grommet described in patent document 1. FIG. It is a bottom view which shows the state which assembled | attached the pin to the conventional grommet shown to FIG. 9A. FIG. 9B is a perspective view of the conventional grommet shown in FIG. 9A.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1A to 8B. In this description, after clarifying the structure, reference is made to the operating features.

(Construction)
A grommet 3 according to an embodiment of the present invention constitutes a clip 1 together with a pin 2. As the clip 1, for example, as shown in FIGS. 1A to 2B, when one or more plate members 6 are attached to another plate member 4 such as a panel, two or more as shown in FIGS. 5A to 5C. This is used when connecting the plate members 8 in a laminated state.

Here, the “through hole for the panel or the like” in the above (1) is configured such that, for example, one or more plate members 6 are attached to another plate member 4 such as a panel depending on the use of the clip 1 including the pin 2 and the grommet 3. In such a case, the mounting through-hole 5 provided in the other plate member 4 is shown, and in the case where two or more plate members 8 are connected, the connecting through-hole 9 provided in each plate member 8 is shown.

Next, a specific example of the pin 2 used together with the grommet 3 will be described. As illustrated in FIGS. 4A to 4D, the pin 2 is a resin molded product, and includes a head portion 20 and a shaft portion 21 provided below the head portion 20. The head 20 is formed in a substantially disk shape. The shaft portion 21 protrudes from the center of the lower surface of the head 20, and the upper shaft portion 22, the locking shaft portion 23, and the lower shaft portion 24 are arranged in this order toward the tip 25. The outer diameter of the locking shaft portion 23 is the largest, and the outer diameter of the lower shaft portion 24 is the smallest. Further, the locking shaft portion 23 is located between the upper shaft portion 22 and the lower shaft portion 24, and has a tapered shape that decreases in diameter toward the upper side formed in the connection portion with the upper shaft portion 22. It has a main stop step 23 a and a tapered portion 23 b that is formed in a connection portion with the lower shaft portion 24 and has a diameter that decreases toward the lower side.

The outer circumferential surface of the shaft portion 21 is provided at a position where four vertical ribs 26 are equally divided. Each of the vertical ribs 26 extends from the upper and lower middles of the upper shaft portion 22 to a slightly lower side so as to be wide, and the lower rib 28 extends from the upper rib 27 toward the tip 25 and is formed narrow. It consists of. The lower rib 28 is provided with a slightly lower overhang or height than the upper rib 27. Further, as shown in FIG. 4D, the connecting portions of the upper and lower ribs 27 and 28 are continuously formed with a taper 27a in which the rib width is narrowed downward and a taper 28a in which the rib height is lowered downward. Yes. The lower rib 28 is formed in a taper 28b whose lower side corresponding to the tip 25 is gradually lowered, and is easily inserted into a through hole such as a panel.

In the pin structure described above, the temporary assembly recess 29 is defined by the portion between the lower ribs 28 on the outer periphery of the lower shaft portion 24, the upper tapered portion 23 b, and the inner end face of the tip 25. ing. The tip 25 has a hook shape and is formed so that its outer diameter increases from the bottom to the top, and is easy to insert into a through-hole such as a panel like the taper 28b.

On the other hand, as illustrated in FIGS. 5A to 7B, the grommet 3 is a resin molded product, and has a leg portion 30 and a flange portion 35 protruding from the outer periphery of the upper end of the leg portion 30. The leg portion 30 is composed of a plurality of leg pieces 32 and a hollow portion for receiving a pin, and the collar portion 35 is composed of collar half bodies 35A and 35B connected via a thin-walled hinge portion 37, and the leg pieces 32 are connected to each other. The pin 2 and the grommet 3 are temporarily assembled by inserting the shaft portion 21 of the pin 2 into the hollow portion of the leg portion 30 of the grommet 3. (See FIGS. 2A and 2B), and the thing of the cited document 1 in that it becomes a full stop mode (see FIGS. 1B, 3 A, and 3 B) in which the leg portion 30 is expanded by further pushing the shaft portion 21. Is almost the same. In the present embodiment, in particular, the hook portion 38 provided on one end side (in this example, the end portion side of the collar half 35A) where the flange portion 35 is opposed across the opening 34, and the other end portion side. (In this example, an engagement portion 39 provided on the end portion side of the collar half body 35B) that closes the opening 34 with the hook portion 38 and engages the hook portion 38 so as to be relatively movable by a predetermined distance. It has the characteristics in the point which has, the shape of a hinge part 37 and the leg part 30, and a detailed structure. Hereinafter, these main parts will be described in detail.

The entire shape of the grommet 3 is a substantially elliptical cylindrical shape in which the leg portion 30 and the flange portion 35 are spread in the width direction in a state where the grommet 3 is molded, and the hook portion 38 and the engaging portion 39 are engaged after molding. Then, the leg part 30 and the collar part 35 become a substantially cylindrical shape which approximated the cylindrical shape.

The leg part 30 is divided into four leg pieces 32 by gaps 31 that are four upper and lower slits extending in the axial direction between the periphery and the like, with a flange 35 protruding from the outer periphery of the upper end. Yes. Each gap 31 is a small gap 31a that is narrow from the tip (lower end) of the leg portion 30 to substantially the middle in the vertical direction, and a large gap 31b that is wider than the small gap 31a on the upper side. As shown in FIGS. 2A, 2B, 5B, and 5C, the small gap 31a is narrow corresponding to the above-described lower rib 28, and the large gap 31b is widened corresponding to the above-described upper rib 27.

Each leg piece 32 has its tip 32a squeezed inward to facilitate insertion into a through-hole such as a panel. Further, as shown in FIGS. 3A and 3B, a convex locking claw 33 is provided near the inner tip of each leg piece 32.
That is, in this structure, as shown in FIGS. 2A and 2B, when the shaft portion 21 of the pin 2 is inserted partway into the leg portion 30, the locking claw 33 of each leg piece 32 fits into the recess portion 29 of the shaft portion 21. The combined temporary assembling mode is obtained, and when the shaft portion 21 of the pin 2 is pushed to the end as shown in FIG. 3A and FIG. In the temporary assembly mode, each leg piece 32 is not expanded and displaced. In this stop mode, the locking claw 33 of each leg piece 32 is engaged with the step 23a on the locking shaft portion side, and each leg piece 32 is expanded and displaced to the maximum.

If the collar part 35 is demonstrated in the aspect with the grommet 3 shape | molded with reference to FIG. 6A, while the collar half body 35A and the collar half body 35B are integrated via the hinge part 37 so that expansion / contraction displacement is possible. The end portions of the saddle halves 35A and 35B are opposed to each other with the opening 34 interposed therebetween.

A hook portion 38 is provided at the end of the saddle half 35A, and an engaging portion 39 is provided at the end of the saddle half 35B. Concave portions 36 are respectively provided in the intermediate portions of the inner surfaces of the saddle halves 35A and 35B. Each recess 36 communicates between the two leg pieces 32 and the large gap 31 b between the remaining two leg pieces 32. The hinge portion 37 is provided on the outer peripheral side of the flange portion 35 and substantially faces the hook portion 38. In addition, the hinge portion 37 communicates with the large gap 31b between the leg pieces 32 to which the concave portion 36a which is the inner surface side space portion is engaged with the hook portion 38 and the engaging portion 39 as will be described later. Yes. The hook portion 38 communicates with the large gap 31b between the leg pieces 32 to which the concave portion 36b that is the inner surface side space portion corresponds.

As shown in FIG. 6B, the hook portion 38 and the engaging portion 39 are provided so as to overlap each other when the saddle halves 35A and 35B connected via the hinge portion 37 are moved in the approaching direction. ing. The hook portion 38 has a flat plate portion 38a that is substantially flush with the lower surface of the collar half body 35A in a side view and is thinner than the thickness of the flange portion 35, and a latching portion that is erected on the top end of the flat plate portion 38a. 38b. The engaging portion 39 includes a hollow portion 39a that is cut out in a reverse concave shape from the lower surface side of the collar half body 35B, and a locking piece portion 39b on the end side that defines the hollow portion 39a.

As shown in FIG. 6B, the hook portion 38 and the engaging portion 39 are configured such that one of the collar halves 35 </ b> A and 35 </ b> B connected via the hinge 37 is moved to the other side, or the collar halves 35 </ b> A and 35 </ b> B are When the latching portion 38b enters the recess portion 39a, the engagement portion 38b is engaged. In this engagement structure, when the hook portion 38 is engaged with the engagement portion 39, the collar halves 35A and 35B oppose the elastic force of the hinge portion 37, and FIG. 6B, FIG. 7B, and FIG. From each of the diameter-enlarging modes indicated by the solid line, each is moved in the direction of diameter reduction approaching each other as indicated by the alternate long and short dash line in each of FIGS. 6B, 7B, and 8B. That is, the hook portion 38 and the engaging portion 39 are configured to close the opening 34 and be relatively movable by a predetermined distance.

(Operation)
In the clip 1 described above, when the shaft portion 21 of the pin 2 is inserted into the leg portion 30 of the grommet 3, the latching claw 33 of each leg piece 32 engages with the recess portion 29 to be temporarily assembled. Further, when the pin 2 is further pushed into the grommet 3, each leg piece 32 is expanded as shown in FIG. 3A or 3B, and the locking claw 33 of the leg piece 32 engages with the step 23a and finally stops. It becomes an aspect. In this stop mode, as shown in FIGS. 1B and 3A, in the state where the leg portion 30 is inserted into the mounting holes 7 and 5 of the plate members 6 and 4, the base end in which the flange portion 35 and the leg pieces 32 are expanded. For example, the plate member 6 on the attachment component side may be fixed to the plate member 4 such as a housing or a panel, or the plate members 6 and 4 may be connected to each other. it can. These are almost the same as the conventional one, but the above embodiment is completely different from the conventional one in the following points.

(1) In the above embodiment, as shown in FIG. 2A or 2B, the hook portion 38 is engaged with the engaging portion 39 in the aspect in which the pin 2 is temporarily assembled to the grommet 3. By preventing the opening 34 from expanding, the pin 2 can be held so as not to be inadvertently detached from the grommet 3. Thereby, after the pin 2 is temporarily assembled to the grommet 3, the pin 2 is not carelessly removed or dropped even if an external force is applied, so that it is possible to efficiently carry out the transfer work and the parts management.

(2) In FIGS. 2B and 3B, the through holes 5a and 7a of the plate members 4 and 6 have a smaller diameter (L1 dimension is smaller than the L dimension) than the through holes 5 and 7 shown in FIGS. 2A and 3A. ing. According to the above structure, the halves 35A and 35B are connected to each other as shown by the one-dot chain line in FIG. 6B, FIG. 7B, and FIG. When moving in the direction of diameter reduction approaching each other against the elastic force of the hinge portion 37, it can be inserted into the through holes 5a, 7a whose hole diameter is smaller than the standard without receiving a load.

(3) Further, since the collar halves 35A and 35B are moved in the diameter-reducing direction against the elastic force of the hinge portion 37 in the engaged state of the hook portion 38 and the engaging portion 39, FIG. As shown in FIGS. 7B and 8B, when the hand or finger is released with the clip 1 inserted in the through holes 5a and 7a, the grommet 3 is displaced in the diameter increasing direction and is easily restrained in the through holes 5a and 7a. Become. Thus, with this structure, even if vibration is applied to the clip 1 in the temporary assembly mode of FIG. 2A or FIG. 2B, the clip 1 can be prevented from being unintentionally pulled out or lifted, thereby improving usability. The above advantage is that, as an example of connecting two or more plate members with the clip 1, as shown in FIG. 5C, the through hole 9a of each plate member 8 has a smaller hole diameter (L1 size is smaller than L size) than FIG. 5B. It is the same when it is.

In addition, the grommet of this invention should just be equipped with the structure specified by said (1), and a detail can be changed and developed with reference to the form example. As a modification, a hook part and an engaging part may be provided upside down as a grommet, or a groove or a protrusion used when the pin is pulled out from the use state of FIG. 1B may be attached to the head.
This application is based on a Japanese patent application filed on May 26, 2011 (Japanese Patent Application No. 2011-117545), which is incorporated by reference in its entirety. Also, all references cited herein are incorporated as a whole.

1 ... clip 2 ... pin (20 is head, 21 is shaft)
3 ... Grommet (34 is an opening, 37 is a hinge part)
4, 6, 8 ... plate members (5 and 5a are through holes, 7 and 7a are through holes, 9 is a through hole)
21 ... Shaft (22 is upper shaft, 23 is locking shaft, 24 is lower shaft)
23a ... Step 26 ... Vertical rib (27 is upper rib, 28 is lower rib)
29 ... Temporary assembly recess 30 ... Leg (31 is a gap, 32 is a leg piece, 33 is a locking claw)
35 ... buttocks (35A and 35B are half halves)
38... Hook part (38a is a flat plate part, 38b is a hook part)
39... Engaging portion (39a is a recess, 39b is a locking piece)

Claims (6)

It has a plurality of leg pieces to be inserted into the through-holes of the panel and a hollow part for receiving the pin, and the plurality of leg pieces can be expanded and locked to the panel by inserting the pin into the hollow part. Leg and
Projecting around the upper end of the leg, and
The flange portion has an opening cut out so as to communicate with a gap between the plurality of leg pieces, and a hook portion provided at one end of the plurality of leg pieces facing the opening. An engaging portion that is provided at the other end of the plurality of leg pieces and engages with the hook portion so as to keep the opening closed with the hook portion and to be relatively movable by a predetermined distance; The grommet characterized by having. The said collar part has a hinge part provided in the location substantially opposed to the said hook part, It elastically displaces through the said hinge part, The said opening can be opened and closed, It is characterized by the above-mentioned. The grommet described. The grommet according to claim 2, wherein the hinge portion is provided on an outer peripheral side of the flange portion. The leg portion has at least four leg pieces, and the flange portion has a plurality of flange halves provided with the hinge portion interposed therebetween,
The plurality of saddle halves are moved in a diameter-reducing direction approaching each other from a diameter-enlarging mode against the elastic force of the hinge part in a state where the hook part is engaged with the engaging part. The grommet according to claim 2 or 3. The grommet according to any one of claims 1 to 4, wherein the hook portion and the engaging portion are provided so as to be stacked one above the other. The grommet according to any one of claims 1 to 5, wherein the hook portion includes a flat plate portion that is thinner than a thickness of the flange portion, and a hooking portion that is erected at the tip of the flat plate portion.

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