JP2012246963A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the risk of dropping off of a pin attached to a grommet and to improve characteristics for handling and insertion to a through hole.SOLUTION: The grommet 3 is equipped with: a leg part 30 having a plurality of leg pieces 32 and formed to be a hollow shape for accepting a pin 2; and a flange 35 that protrudes around the upper end of the leg part 30. In the grommet 3, by the insertion of the leg part 30 to the through hole of a panel or the like, and by pushing the pin into the leg part, each leg piece is opened wide to enable locking. The flange 35 comprises: an opening 34 cut out to lead into a space between the multiple leg pieces; a hook 38 provided at one end facing opposite interposing the opening; and an engaging part 39 that is provided at the other end of the multiple leg pieces and keeps the opening in the closed state with the hook while engaging relatively movably within a specific distance.

Description

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

  FIG. 9 shows a clip disclosed in Patent Document 1. The clip 1 includes a pin 2 and a hollow grommet (bush) 3 for receiving the pin. The grommet 3 protrudes to the upper periphery of each leg piece 9A, 9B, and the leg part (body part) 9 formed into a hollow into which the pin 2 is inserted by two semi-cylindrical leg pieces (half bodies) 9A, 9B. Each of the legs has a flange portion (flange portion) 10 made of a semicircular disk-like body 10A, 10B, and a leg portion 9 is inserted into a through-hole provided in a panel or the like and the pin 2 is pushed into the leg portion. The piece can be expanded and locked. The leg portion 9 is provided with an opening 13 for receiving the shaft portion 5 of the pin in a direction orthogonal to the axial direction. The leg portion 9 and the heel portion 10 can be expanded outward in the radial direction via a hinge portion 14 that is a thin portion provided at a location facing the opening 13.

  On the other hand, the pin 2 has a shaft portion 5 accommodated in the hollow portion of the grommet 3 and a flange 6 formed at one end of the shaft portion 5. The overhanging portion of the shaft portion 5 is, as shown in (a), a narrow-width portion on the distal end side that does not widen the outer diameter of the leg portion 9 when in the non-fastening position or temporary assembly position, and the fastening position or the final fastening position. And a wide portion on the flange 6 side that widens the outer diameter of the leg portion.

  In the above structure, the pin 2 is pushed into the grommet 3 from the opening 13 and is assembled at the temporary assembly position, whereby the work can be performed with the pin 2 assembled to the grommet 3. The wide width portion of the shaft portion 5 widens the gap between the leg pieces constituting the leg portion 9 and the opening 13 to widen the leg pieces 9A, 9B outward in the radial direction. It can be formed short.

Japanese Patent No. 4545711

  The thing of the said patent document 1 can be handled in the temporary assembly | attachment state by which the pin 2 was pushed from the opening 13 with respect to the grommet 3. FIG. However, in this conventional structure, first, the semi-cylindrical portions 9A and 9B and the flanges constituting the leg portion 9 are inserted in a stage before being inserted into a through-hole such as a panel, that is, in the parts management and transport process after manufacture. Since the semicircular discs 10A and 10B constituting the portion 10 are always easily expanded in diameter via the hinge portion 14, the pin 3 may be accidentally detached from the grommet 3 or dropped. Moreover, since the leg part 9 and the collar part 10 are expanded / contracted via the hinge part 14, it has versatility with respect to the hole diameter of through-holes, such as a panel, but the applicable maximum hole diameter and minimum hole diameter are set. It is difficult to cause a damage due to an excessive load. Moreover, the semicircular disk-like bodies 10A and 10B constituting the flange portion 10 are restricted by the outer peripheral edge colliding when trying to widen the opening 13 because the hinge portion 14 is provided on the inner peripheral side of the flange portion. It becomes easy to be done. The semi-cylindrical parts 9A and 9B constituting the leg part 9 are difficult to bend because they are divided into two parts.

  The object of the present invention is to solve the above-described problems, and in addition to the advantages of versatility with respect to the hole diameter of the through-holes provided in the panel and the like as in Patent Document 1 and excellent assemblability of the pins. The object is to surely eliminate the possibility of the pins being unintentionally removed or dropped, and to improve the handleability and the insertability into the through holes. Other purposes will be clarified in the description below.

  In order to achieve the above object, the present invention is specified by referring to the embodiment, and a leg 30 formed hollow so as to receive the pin 2 by a plurality of leg pieces 32, and a hook protruding above the leg. In the grommet 3 which has a portion 35, and the leg portion 30 can be expanded and locked by inserting the leg portion 30 into a through hole of a panel or the like and pushing the pin into the leg portion. Are provided in the opening 34 cut out so as to communicate with the gap between the leg pieces, the hook portion 38 provided on one end side facing the opening, and the other end side. It has an engaging portion 39 that engages with the hook portion so that the opening is kept closed with the hook portion and is relatively movable by a predetermined distance.

The present invention as described above is more preferably embodied as specified in claims 2-6.
(A) The flange portion 35 has a hinge portion 37 provided at a position substantially opposite to the hook portion 38, and is elastically displaced via the hinge portion so that the opening 34 can be opened and closed. (Claim 2).
(A) The hinge portion 37 is provided on the outer peripheral side of the flange portion 35 (Claim 3).

(C) The hook portion 38 and the engaging portion 39 are provided so as to be stacked one above the other (claim 4).
(D) The hook portion 38 is composed of a flat plate portion 38a that is thinner than the flange portion 35 and a latching portion 38b that is erected at the tip of the flat plate portion (Claim 5).
(E) The leg portion 30 has at least four leg pieces 32 and the hook halves 35A and 35B sandwiching the hinge portion 37 constituting the flange portion 35 are connected to the hook portion. In a state in which 38 is engaged with the engaging portion 39, it is moved in the diameter reducing direction approaching each other from the diameter expanding mode against the elastic force of the hinge portion 37 (Claim 6).

  In the invention of claim 1, since the grommet can be reduced in diameter including the leg portion due to the presence of the opening provided in the collar portion, the versatility with respect to the hole diameter of the through hole of the panel and the like and the ease of assembly with the pin are excellent. In that respect, it is the same as in Patent Document 1, and in addition to that, by engaging the hook part with the engaging part, it is possible to prevent the opening from being widened and to eliminate the inadvertent removal of the pin, as shown in FIG. 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 of the panel or the like can be maintained.

  In the invention of claim 2, the hinge portion provided at a location where the collar portion is substantially opposite to the hook portion, that is, a state where the bending portion is kept at one point so that the rigidity of other portions is maintained or durability is provided. Elastic displacement is also obtained.

  In invention of Claim 3, when the hinge part of Claim 2 is provided in the outer peripheral side of the collar part, compared with the structure received on the inner peripheral side like patent document 1, it is hard to be controlled when trying to expand opening. And can maintain its appearance.

  In the invention of claim 4, the hook part and the engaging part are arranged so that the hook parts are stacked one above the other so that the whole hook part can be maintained at substantially the same thickness or height as in the embodiment, thereby making the appearance Good characteristics can be maintained.

  In the invention of claim 5, since the hook portion is composed of a thin flat plate portion and a hooking portion on the flat plate portion, it is simple and clear, and is formed integrally with the collar portion, so that good moldability can be obtained.

  In the invention of claim 6, since the leg portion is composed of 4 or more, it is easy to be elastically displaced, so that it can be inserted into, for example, a through hole with a low pressing force. Further, since the hook halves are moved in the diameter reducing direction against the elastic force of the hinge portion in the engaged state of the hook portion and the engaging portion, for example, they are put in a through hole such as a panel in FIG. It is easy to be restrained in the hole in the inserted state, so that even if vibration is applied, there is no need to inadvertently pull out or lift, and usability can be improved.

The grommet of a form example is shown in a use mode, (a) is a top view and (b) is a side view. The operation | movement in the insertion aspect of the said grommet with respect to through-holes, such as a panel, is shown, (a) is the state figure of the said grommet in case the said through-hole is larger diameter than a design value, (b) is the design value of the said through-hole. FIG. 6 is a state diagram of the grommet when the diameter is smaller than that. (A) is a cross-sectional view in the use state after the pin is pushed in from the mode of FIG. 2 (a), (b) is a cross-sectional view in the use state after the pin is pushed in from the mode of FIG. 2 (b). is there. The above-mentioned pin is shown separately, (a) is a top view, (b) is a front view, (c) is a cross-sectional view taken along line AA in (b), and (d) is a side view seen from the B direction in (c). It is. The above grommet is shown as a single product, (a) is a front view of the grommet in a molded state, and (b) and (c) are when the through-hole of the panel or the like has a large or small hole diameter with the hook portion engaged with the engaging portion. FIG. (A) is CC sectional view taken on the line of Fig.5 (a), (b) is the C1-C1 sectional view taken on the line of FIG.5 (b). (A) is the DD sectional view taken on the line of Fig.5 (a), (b) is the D1-D1 sectional view taken on the line of FIG.5 (b). (A) is the EE sectional view taken on the line of Fig.5 (a), (b) is the E1-E1 sectional view taken on the line of FIG.5 (b). The structure of patent document 1 is shown, (a) is a front view which shows the state which assembled | attached the pin to the grommet, (b) is a bottom view, (c) is a perspective view of the said grommet.

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

(Structure) The grommet 3 in the embodiment forms a clip 1 together with a pin 2. As the clip 1, for example, when one or more plate members 6 are attached to another plate member 4 such as a panel as shown in FIGS. 1 and 2, two or more plate members 8 are laminated as shown in FIG. Used when connecting.

  Here, the “through-hole of the panel or the like” in claim 1 is 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 some cases, the mounting through-holes 5 are provided in the other plate members 4. When the two or more plate members 8 are connected to each other, the connection through-holes 9 are provided in each plate member 8.

  Next, a specific example of the pin 2 used together with the grommet 3 will be clarified first. The pin 2 is a resin molded product as illustrated in FIG. 4, 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, and an upper shaft portion 22, a locking shaft portion 23, and a lower shaft portion 24 are arranged in this order toward the tip 25. As for the outer diameter, the locking shaft portion 23 has the largest diameter, and the lower shaft portion 24 has the smallest diameter. 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 23a and a tapered portion 23b having a diameter that decreases toward the lower side formed at the connecting portion with the lower shaft portion 24.

  On the outer peripheral surface of the shaft portion 21, four vertical ribs 26 are provided at positions that equally divide the periphery. Each of the vertical ribs 26 extends from an upper rib 27 that is slightly wider than the upper and lower middles of the upper shaft portion 22 and is formed wide, and a lower rib 28 that is formed from the upper rib 27 to the tip 25 and is formed narrow. Become. The lower rib 28 is provided with a slightly lower overhang or height than the upper rib 27. 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 from above and a taper 28a in which the rib height is lowered downward. The lower rib 28 is formed in a taper 28b whose lower side corresponding to the tip 25 is gradually lowered.

  In the pin structure described above, the temporary assembling recess 29 is defined by the portion between the longitudinal ribs 28, the upper tapered portion 23b, and the inner end surface of the tip 25 on the outer periphery of the lower shaft portion 24. is doing. 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, the grommet 3 is a resin molded product as illustrated in FIGS. 5 to 7, and includes a leg portion 30 and a flange portion 35 protruding from the outer periphery of the upper end of the leg portion 30. The portion 30 is composed of a plurality of leg pieces 32, and the collar portion 35 is composed of collar halves 35A and 35B connected through a thin-walled hinge portion 37, and is cut out so as to communicate with the gap 31 between the leg pieces. The point having the opening 34, the pin 2 and the grommet 3 are temporarily assembled into the leg portion 30 of the shaft portion 21 (see FIG. 2), and the leg portion 30 is further pushed into the leg portion 30. This is almost the same as that of the cited reference 1 in that it is a full stop mode (see FIGS. 1 and 3). The contrivance points are, in particular, the hook portion 38 provided on one end side (in this example, the end portion side of the saddle half body 35A) where the flange portion 35 is opposed across the opening 34, and the other end portion side ( In this example, there is provided an engaging portion 39 provided on the end portion side of the collar half body 35B to close the opening 34 with the hook portion 38 and engage with the hook portion 38 so as to be relatively movable by a predetermined distance. The shape of the hinge part 37 and the leg part 30, and the point of a detailed structure exist. Hereinafter, these main parts will be described in detail.

  The entire shape of the grommet 3 is a substantially oval cylindrical shape in which the leg portion 30 and the flange portion 35 are spread in the width direction when the grommet 3 is as molded, and the hook portion 38 and the engaging portion 39 are engaged after molding. If it is in a state, it will become a substantially cylindrical shape in which the leg part 30 and the collar part 35 approached 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 leg tip (lower end) to approximately the middle in the vertical direction, and a large gap 31b that is wider than the small gap 31a on the upper side. As inferred from FIG. 2, the small gap 31 a is narrow corresponding to the above-described lower rib 28, and the large gap 31 b is widened corresponding to the above-described upper rib 27.

  Each leg 32 has its tip 32a squeezed inward in order to facilitate insertion into a through-hole such as a panel, and a convex locking claw 33 is provided near the inner tip as shown in FIG. Yes. That is, in this structure, as shown in FIG. 2, the shaft portion 21 of the pin is inserted partway into the leg portion 32, and the locking claw 33 of each leg piece is fitted into the recess portion 29 of the leg portion. Further, when the pin shaft portion 21 is further pushed in as shown in 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 engages with the locking shaft side step 23a, and each leg piece 32 is expanded and displaced to the maximum.

  When the collar portion 35 is described in a state where the grommet 3 is formed with reference to FIG. 6A, the collar half body 35 </ b> A and the collar half body 35 </ b> B are integrated via a hinge portion 37 so as to be capable of expansion / contraction displacement. At the same time, the ends of the halves are opposed to each other with the opening 34 interposed therebetween.

  Among these, a hook portion 38 is provided at the end of the collar half 35A, and an engaging portion 39 is provided at the end of the collar 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 gap 31 (the large gap 31b) 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 has a gap 31 (a large gap 31b) between the leg pieces 32 to which the concave portion 36a that is the inner surface side space portion corresponds in a state where the hook portion 38 and the engaging portion 39 are engaged as described later. Communicated with. The hook portion 38 communicates with the gap 31 (the large gap 31b) between the leg pieces 32 corresponding to the concave portion 36b which is the space portion on the inner surface side.

  The hook portion 38 and the engaging portion 39 are provided so as to overlap each other when the saddle halves 35A and 35B are moved in the approaching direction via the hinge portion 37 as shown in FIG. 6B. 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 moved by moving one of the half halves 35A and 35B to the other side via the hinge portion 37, or between the half halves 35A and 35B. It is moved in the approaching direction via the portion 37 and is engaged when the latching portion 38b enters the recessed portion 38b. In this engagement structure, when the hook portion 38 is engaged with the engagement portion 39, the collar halves 35 </ b> A and 35 </ b> B resist each other against the elastic force of the hinge portion 37. ) From the diameter-enlarging mode indicated by the solid line, as shown by the alternate long and short dash line in each of FIGS.

(Operation) In the clip 1 described above, when the pin 2 is inserted into the leg portion 30 with respect to the grommet 3, the locking claw 33 of each leg piece 32 is engaged with the recess 29 as described above. As a result, the leg pieces 32 are expanded as shown in FIG. 3, and the locking claws 33 of the leg pieces 32 are engaged with the locking shaft side step 23a. It becomes a stop mode. In the present stop mode, as shown in FIG. 1 and FIG. 3A, the base portion 30 and each leg piece 32 are expanded in a state where the leg portion 30 is inserted into the mounting holes 7 and 5 of the plate members 6 and 4. For example, the plate member 6 on the article side can be fixed to the plate member 4 such as a housing or a panel, or the plate members 6 and 4 can 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.

(A) In the embodiment described above, the grommet 3 prevents the opening 34 from expanding by engaging the hook portion 38 with the engaging portion 39 in the embodiment in which the pin 2 is temporarily assembled as shown in FIG. Thus, the pin 2 can be held so as not to be removed carelessly. Thereby, in this structure, 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 and carry parts. .

(B) Each of FIGS. 2 and 3 (b) shows that the through holes 5a and 7a of the plate members 4 and 6 are smaller in diameter than the through holes 5 and 7 of FIG. Smaller). In the above-described structure, the halves 35A and 35B are opposed to the elastic force of the hinge portion 37 from the diameter-enlarged form shown by the solid lines in FIGS. When moving in the direction of diameter reduction approaching each other as indicated by, the through-holes 5a and 7a whose hole diameters are smaller than the standard can be inserted without receiving a load.

(C) Moreover, since the hook 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, each figure ( When the hand or finger is released in the inserted state inserted into the through holes 5a and 7a as shown in b), it is displaced in the diameter increasing direction and is easily restrained in the hole. Thus, with this structure, even if vibration is applied to the clip 1 in the temporary assembly mode of FIG. 2, the clip 1 is not accidentally pulled out or lifted, and the usability can be improved. The above advantage is that, as an example in which two or more plate members are connected by the clip 1, as shown in FIG. 5C, the through holes 9a of the plate members 8 have a smaller hole diameter (L1 dimension is L than that of FIG. 5B). It is the same when it is smaller than the dimension).

  In addition, the grommet of this invention should just be equipped with the structure specified by Claim 1, and a detail can be changed and developed with reference to the form example. For example, a hook and an engaging portion are 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. 1 as a pin.

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: Locking portion 26: Vertical rib (27 is an upper rib, 28 is a lower rib)
29 ... Recess for temporary assembly 30 ... Leg (31 is a gap, 32 is a leg piece, 33 is a locking claw)
35 ... buttocks (35A and 35B are half halves)
39... Engaging portion (39a is a relief portion, 39b is a regulating portion)
38... Hook part (38a is a flat plate part, 38b is a hook part)
39... Engaging portion (39a is a relief portion, 39b is a regulating portion)

Claims (6)

The leg of the pin has a leg part formed hollow so as to receive a pin by a plurality of leg pieces, and a flange part protruding around the leg part, and the leg part is inserted into a through hole of a panel or the like. In the grommet that can expand and lock each leg piece by pushing into the part,
The flange portion is provided on an opening cut out so as to communicate with a gap between the leg pieces, a hook portion provided on one end side facing the opening, and on the other end side. The grommet has an engaging portion that engages with the hook portion so that the opening is kept closed with the hook portion and is relatively movable by a predetermined distance.   The said collar part has a hinge part provided in the location substantially opposed to the said hook part, and elastically displaces via the said hinge part, The said opening can be opened and closed. Grommet.   The grommet according to claim 2, wherein the hinge portion is provided on an outer peripheral side of the flange portion.   The grommet according to any one of claims 1 to 3, wherein the hook portion and the engagement portion are provided so as to be stacked one above the other.   The grommet according to any one of claims 1 to 4, wherein the hook portion includes a flat plate portion thinner than a thickness of the flange portion and a hooking portion erected at the tip of the flat plate portion.   The leg portion has at least four leg pieces, and the hook halves sandwiching the hinge portion constituting the flange portion are in a state where the hook portion is engaged with the engagement portion. The grommet according to any one of claims 2 to 5, wherein the grommet is moved in a diameter-reducing direction approaching each other from a diameter-enlarging mode against the elastic force of the hinge portion.

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