JP2005249073A - Clip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve convenience for use and generality by operating a pin member with substantially equal pressing force even when the same clips are different in board thickness, lightening the engagement holding force and clamping force of leg parts when the board thickness is large, and increasing the same when it is small. <P>SOLUTION: This clip 1 includes: a grommet 3 having an elastic leg part 30 with an insert hole 30a and a flange part 35; and a pin member 2 having a head part 20 and a shaft part 22, wherein the leg part 30 is inserted in mounting holes M1, P1 of the respective plate members M, P, and the shaft part 22 is pressed in the insert hole 30a by the pressing operation of the pin member 2 to expand the leg part 30, thereby holding the plate members M, P between the expanded corresponding parts of the flange part 35 and the leg part 30. In the flange part 35, a projecting part 39b is projected on the peripheral part side at a predetermined distance from the base end 36 side connected to the leg part 30, and the part between the base end 36 and the projecting part 39b is formed as a deformed part 38 elastically displaceable up and down. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to, for example, a clip composed of a female grommet and a male pin member among clips used when attaching a first plate member to a second plate member or connecting a plurality of plate members.

  A clip 60 of FIG. 10 is disclosed in Patent Document 1, and includes a grommet 61 having an elastic leg 62 with an insertion hole and a flange 66 protruding from the outer periphery of the upper end of the leg 62, and a head 63. And a pin member 65 having a shaft portion 67 provided below the head. The leg part 62 is divided into a plurality of leg pieces 64 by vertical slits, and has a claw part 64 a on the protruding end side of the leg piece 64. The shaft portion 67 has a main fastening portion 69 provided in a substantially middle peripheral portion and a temporary fastening portion 68 provided in a distal end peripheral portion. The shaft portion 67 is pushed into the insertion hole of the leg portion 62 so that the claw portion 64a is From the temporarily fixed state engaged with the temporary fixing portion 68, it is engaged with the final fixing portion 69 as shown in FIG. In other words, when the plate member M is attached to the plate member P, or when the plate members M and P are connected to each other, the pin 60 is pushed after the clip 60 is inserted into the attachment holes M1 and P1 in the temporarily fixed state. Thus, the shaft portion 67 is pushed into the insertion hole of the leg portion 62 to expand the leg portion 62. Then, the clip 60 becomes a mode in which the plate members M and P are sandwiched between the flange portion 66 and the corresponding portion where the leg portion 62 is expanded.

  In the clip 60 described above, the engagement holding force and the clamping force in the use state are proportional to the degree of deformation of the leg piece 64 with respect to the hole diameter of the mounting hole and the engagement force between the main fastening portion 69 and the claw portion 64a. Further, when the plate thickness dimensions are different, not only the pressing force of the pin member 65 but also the engagement holding force and the clamping force vary. Normally, as the total plate thickness of each plate member becomes thinner, the pressing force on the pin member 65 becomes weaker, and the engagement holding force and clamping force become smaller. Conversely, as the total plate thickness dimension increases, the pressing force of the pin member 65 increases and the engagement holding force and clamping force also increase.

Therefore, as a clip structure, in order to improve versatility and usability with respect to the plate thickness, the pressing force of the pin member can be maintained almost constant regardless of the total plate thickness dimension, and the engagement holding force and clamping force are also increased. It is preferable to keep it at a predetermined value. The present applicants developed a clip disclosed in Patent Document 2 in order to satisfy such a requirement. That is, in this structure, the expansion point set to the inner diameter of the leg portion is composed of two or more different heights from the collar and different positions in the circumferential direction of the hole. Is expanded through the upper first expansion point, and when the plate thickness is relatively thin, the leg portion is expanded through the lower second expansion point. is there.
Japanese Patent No. 3325113 JP-A-11-270525

  In the structure of Patent Document 2 above, versatility and usability with respect to the plate thickness can be improved, but there is a problem that the mold becomes complicated and expensive because each expansion point must be formed at a different location on the inner surface of the leg. is there. Therefore, the present invention does not involve such a problem of the mold, and the plate thickness dimension (this is the total plate thickness dimension of both plate members when the first plate member is attached to the second plate member, a plurality of sheets. When the plate members are connected, this means the total thickness of the plate members.The same applies to the following, and the pin member can be pushed into the grommet-side insertion hole with almost the same pressing force. In addition, it is possible to improve the usability and quality by relaxing the engagement holding force and clamping force of the legs when the total plate thickness is thick and increasing it when the total plate thickness is thin.

  In order to achieve the above object, the present invention provides a grommet having an elastic leg portion in which an insertion hole is formed in the axial direction and a flange projecting on the outer periphery of the upper end of the leg portion, a head portion, and a lower portion on the head portion. The leg portion is inserted into the mounting hole of each plate member, and the shaft portion is pushed into the insertion hole by a pressing operation of the pin member to expand the leg portion. Thus, in the clip in which the plate member is sandwiched between the flange portion and the corresponding portion where the leg portion is expanded, the flange portion is coupled to the leg portion of the lower surface of the flange portion. A convex portion is provided on the peripheral side that is a predetermined distance away from the base end side, and a deformable portion that is elastically displaceable vertically between the base end and the convex portion is formed. It is characterized by.

  When the plate member is attached to the plate member by the convex portion on the lower surface of the flange portion and the deformed portion constituting the flange portion, the present invention as described above has a total plate thickness dimension of both plate members and a plurality of plate members. Are connected to the upper surface of the plate member by the convex portion according to the total thickness of the plate members (see FIG. 5), and the elastic displacement of the deformation portion. With this, it is changed to a mode (see FIG. 6) in which the convex portion is brought into contact with the base end side and the deformed portion.

The invention clip according to claim 1 has the following effects. That is, when the total thickness t1 of the plate thickness is smaller than the predetermined value as shown in FIG. 5, the flange portion is in contact with the upper surface of the plate member with the convex portion in the expanded state of the leg portion. It is in a state of being lifted upward in proportion to the height dimension. As a result, in this structure, as compared with the conventional product, the pressing force against the pin member is increased in proportion to the lifted dimension, and the engagement holding force and the clamping force of the legs are relatively increased. On the contrary, as shown in FIG. 6, when the total thickness t2 of the plate thickness is larger than the predetermined value, in the expanded state of the leg portion, the flange portion is based on the elastic surface of the deformation portion with respect to the plate member upper surface together with the convex portion. Since the end portion and the deformed portion also come into contact, the leg portion is in a state of being deeply inserted into the attachment hole, that is, downward by the height of the convex portion. As a result, in this structure, as compared with the conventional product, the pressing force on the pin member is weakened in proportion to the depth of the pin member, and the engagement holding force and the clamping force of the legs are also relatively weak. As a result, the present invention can push the pin member with almost the same force when the total plate thickness dimension is thin and thick, and reduce the fluctuation range of the engagement holding force and the clamping force. , Versatility and usability can be improved. Moreover, it has the advantage which can be implemented, without complicating the metal mold | die like patent document 2. FIG.

-The invention of Claim 2 is the structure by which the said convex-shaped part is projectingly provided in multiple numbers by the said collar part lower surface. In this case, the flange portion is brought into contact with the upper surface of the plate member in a stable state via the convex portions that are scattered.
-Invention of Claim 3 is the structure by which the said deformation | transformation part is formed as several thin piece shape by several through-holes provided between the said base end and the said surrounding part side. This point is significant in that the shape example that gives the elastic portion in the vertical direction is specified.
The invention of claim 4 has a configuration in which the flange portion is provided on the upper surface and has a protruding portion corresponding to the convex portion on the lower surface of the flange portion, and the head portion is in contact with the protruding portion. is there. In this case, the deformed portion is more easily deformed by the projecting portion, and the contact state of the head with the upper surface of the buttocks is reliably obtained even after the deformed portion is deformed.
The invention of claim 5 is characterized in that the deformed portion is elastically displaced by a pressing operation of a pin member when the total plate thickness on the plate member side exceeds a predetermined value, and at least the convex portion is formed on the upper surface of the plate member. The base end side can be contacted. This is significant in clarifying the main function of claim 1.

  The best mode of the present invention will be described with reference to embodiments of the drawings. 1 is a perspective view showing the relationship between the pin member and the grommet. FIGS. 2A and 2B are a front view and a cross-sectional view of the pin member temporarily fixed to the grommet. FIG. 3 is a pin member. FIG. 4 is a bottom view in the temporarily fixed state of FIG. 2. 5 and 6 show the use state of the clip. Each (a) corresponds to the BB line in FIG. 8 (a), and each (a) corresponds to the DD line in FIG. 8 (a). FIG. 7A and 7B show a single pin member, in which FIG. 7A is a front view, FIG. 7B is a bottom view, and FIG. 7C is a sectional view taken along line AA in FIG. 8 and 9 schematically show a single grommet, FIG. 8 (a) is a top view, FIG. 8 (b) is a front view, FIG. 8 (c) is a bottom view, and FIG. 9 (a) is FIG. FIG. 9B is a sectional view taken along line B-B in FIG. 8A, and FIG. 9B is a sectional view taken along line C-C in FIG. In the following description, the invention is outlined on the basis of the drawings and then referred to in detail structure and operation.

(Outline) The clip 1 of the present invention is used, for example, when a first plate member M is attached to a second plate member P and a plurality of plate members are connected in a superposed state. The structure consists of a pin member 2 and a grommet 3 that are resin molded products, a point that the pin member 2 has a head portion 20 and a shaft portion 22 provided below the head portion 20, and a grommet 3 that is a leg portion 30. And the point which has the collar part 35 protrudingly provided by the upper-end outer periphery of the leg part 30, the pin member 2 and the grommet 3 are temporarily fixed by pushing into the insertion hole 30a of the leg part 30 of the axial part 22 (FIG. 2), and is the same as the conventional one in that it is a full stop mode (see FIGS. 3, 5, and 6) in which the leg portion 30 is expanded by further pushing the shaft portion 22. The devised point is that the flange 35 of the grommet 3 has a convex portion 39b protruding substantially concentrically with the insertion hole 30a on the lower side of the lower surface of the bottom end 36 where the grommet 3 is coupled to the leg 30. And that the deformed portion 38 that can be elastically displaced up and down is formed between the base end 36 and the convex portion 39b. When the total plate thickness dimension on the plate member side exceeds a predetermined value, the clip 1 has a portion that abuts on the upper surface of the plate member from the convex portion 39b with the elastic displacement of the deforming portion 38. In addition, the base end 36 and the deformed portion 38 are also changed so that the pressing force of the pin member 2 described above is almost the same, the engagement holding force and the clamping force are different depending on whether the total thickness is thin or thick. It is designed to suppress the fluctuation range of force. Hereinafter, these details will be described in detail.

(Pin Member) As shown in FIGS. 1 and 7, the pin member 2 of the embodiment has a head 20 formed in a substantially disk shape. The shaft portion 22 projects from the center of the lower surface 21 of the head, and a large-diameter shaft portion 23, a locking shaft portion 24, a small-diameter shaft portion 25, and a tip portion 26 are arranged in this order toward the tip. . The outer diameter of each part is set so that the largest portion of the large-diameter shaft portion 23 and the locking shaft portion 24 are substantially the same, and the small-diameter shaft portion 25 is set to be the smallest.

  The large diameter shaft portion 23 is set to have a slightly smaller diameter on the lower side. On the outer peripheral surface, four upper and lower ribs 27 are provided at positions that equally divide the periphery. Each of the upper and lower ribs 27 has an upper width dimension set slightly wider than the lower side, and is continuous from the lower rib portion 27a to the wider upper rib portion 27b with a taper portion 27c in the width direction interposed therebetween. The locking shaft portion 24 is located between the large-diameter shaft portion 23 and the small-diameter shaft portion 25, and a final locking step 24 a is formed between the large-diameter shaft portion 23 and the lower portion. The small-diameter shaft portion 25 has four upper and lower ribs 28 provided at positions that equally divide the periphery, and a tapered portion 29 that increases in diameter toward the upper periphery with respect to the outer periphery of the locking shaft portion 24. It is connected. The upper and lower ribs 28 are located on an extension line of the upper and lower ribs 27 of the large-diameter shaft portion 23. In this structure, the temporary fixing groove 25 a is defined by the portion between the upper and lower ribs 27, the upper tapered portion 29, and the end surface of the lower distal end portion 26 on the outer periphery of the small-diameter shaft portion 25. Forming. The distal end portion 26 has a bowl shape and is formed so that its outer diameter increases from bottom to top.

(Grommet) In the grommet 3 of the embodiment, as shown in FIGS. 1, 8 and 9, the elastic leg portion 30 has a substantially cylindrical shape, and the flange portion 35 is integrally formed on the outer periphery of the upper end. The leg portion 30 is divided into four leg pieces 32 by four upper and lower slits 31 extending in the axial direction between the surroundings and the like. In this case, the slit width of each slit 31 is different between the slit portion 31a from the tip (lower end) to slightly before the upper end and the slit portion 31b on the upper end side from the slit portion 31a, and the slit portion 31a is the rib described above. The slit portion 31b is wide corresponding to the rib portion 27b, and the slit portion 31b is small corresponding to the portion 27a. Each leg piece 32 has its tip 32a squeezed inward. Accordingly, when viewed from above, the inside of the leg 30 in the cylinder, that is, the insertion hole 30a has the same diameter from the upper opening to the vicinity of the tip, and the tip (lower end) 32a is formed at the intersection of the slit portions 31a. It has become.

  Each leg piece 32 has a different inner shape as shown in FIG. 9, and of the four leg pieces 32, two leg pieces 32 in the opposing relationship of FIG. The portion 33 is provided from the tip, and the two leg pieces 32 in the opposing relationship of FIG. 9B have a claw portion 34 inside the tip slightly above the claw portion 33. That is, in this structure, in the final stop mode in which the shaft portion 22 of the pin member 2 is pushed all the way into the insertion hole 30a of the leg portion 32, the pair of leg pieces 32 shown in FIG. 5 and FIG. The claw portion 33 engages with the step 24 a of the locking shaft portion 24, and the claw portions 34 of the pair of leg pieces 32 shown in each (b) are pressed against the corresponding outer surface of the large-diameter shaft portion 23. .

  The flange portion 35 includes a thick base end 36 integrated with the outer periphery of the upper end of the leg portion 32, a thin deformation portion 38 connected to the outer periphery of the base end 36, and each deformation portion 38. The outer peripheral part 37 of the same thickness as the deformation | transformation part 38 provided in the connected state is roughly formed. The deformable portion 38 is located between the base end 36 and the outer peripheral portion 37, and is formed as a piece between a plurality of (four in this example) through holes 38a opened at equal intervals. The outer peripheral portion 37 is provided with a plurality of protrusions 39a on the upper surface and a plurality of convex portions 39b on the lower surface. The protrusions 39 a are respectively provided at locations corresponding to the through holes 38 a on the upper surface of the outer peripheral portion 37. The convex portion 39 is provided at a position corresponding to the protrusion 39 a on the lower surface of the outer peripheral portion 37. In this example, a plurality of protrusions 39a and a plurality of convex portions 39b are provided at equal intervals. The size and height of the protrusion 39a and the convex portion 39b are appropriately designed in consideration of the elasticity of the deformation portion 38 and the like.

(Operation) In the clip 1 described above, when the pin member 2 pushes the shaft portion 22 into the insertion hole 30a of the leg portion 30 with respect to the grommet 3, the tip claw portions 33 and 34 of the leg piece 32 are as described above as shown in FIG. Each leg piece 32 is expanded as shown in FIG. 3, and the tip claw 33 of the leg piece 32 and the step 24a of the locking shaft portion 24 are engaged with each other by engaging with the corresponding groove 25a. The claw portions 34 of the leg pieces 32 engage with each other and come into pressure contact with the corresponding outer surface of the large-diameter shaft portion 23 to be in a final stop state. In the fixed state, the plate members M and P are placed between the flange portion 35 and the corresponding portions where the leg portions 30 are expanded in a state where the leg portion 30 is inserted into the mounting holes M1 and P1 of the plate members M and P. For example, a plate member (for example, a plate member on the article side) M can be fixed to a plate member P such as a housing or a panel, or the plate members M and P can be connected to each other. This basic operation is the same as the conventional one, but is completely different from the conventional one in the following points.

  A) First, in this clip 1, when the total thickness t1 of the plate members 1M and 1P is smaller than a predetermined value as shown in FIG. 5, each leg piece 32 constituting the leg portion 30 which is a use mode is expanded. In the state, the flange portion 35 comes into contact with the upper surface of the plate member 1M at the convex portion 39b. For this reason, the grommet 3 is in a state in which each leg piece 32 is lifted upward in proportion to the height dimension of the convex portion 39b. That is, the gap F1 between the upper surface of the plate member 1M and the lower surface of the head portion 20 is the thickness of the outer peripheral portion 37 constituting the flange portion 35 and the height of the upper surface side protruding portion 39a of the outer peripheral portion 37. The value obtained by adding the height of the lower surface side convex portion 39b. As a result, in this structure, the push operation on the pin member is lower than that of the conventional product (the push operation force on the pin member, and the engaging and holding force of the leg portion and the clamping force are both weakened as the total thickness becomes smaller). The force increases in proportion to the lifted dimension, and the engagement holding force and the clamping force of the leg 30 are relatively increased.

  B) On the other hand, when the total thickness t2 of the plate members 2M and 2P is larger than a predetermined value as shown in FIG. 6, in the expanded state of each leg piece 32 constituting the leg portion 30, the flange portion 35 is provided. Is in contact with the upper surface of the plate member 2M at the base end 36 and the deformed portion 38 together with the convex portion 39b together with the elastic deformation of the deformable portion 38, so that the leg portion 30 is the same as the height of the convex portion 39b. It will be in the state which penetrated deeply into the attachment hole. In this case, in the deformation of the flange portion 35, the pressing force of the pin member 2 is applied to the upper protruding portion 39a via the head 20, and the protruding portion 39b is deformed by the downward load of the protruding portion 39a. It is crushed or displaced upward with deformation. Due to this, the gap F2 between the upper surface of the plate member 2M and the lower surface of the head 20 is F1 as described above according to the degree of deformation of the deformation part 28 and the degree of crushing or upward displacement of the convex part 39b. Smaller. As a result, in this structure, the push force on the pin member is increased compared to the conventional product (the push operation force on the pin member, the engagement holding force and the clamping force of the leg portion are both increased as the total plate thickness increases). The operating force becomes weaker in proportion to the deeply penetrated dimension, and the engagement holding force and the clamping force of the leg 30 are also relatively weakened.

  In other words, the clip 1 described above can push and operate the pin member 2 with substantially the same force when the total plate thickness is thinner and thicker than the conventional product, and the engagement holding force. And the fluctuation range of the clamping force can be suppressed. Thereby, as a clip structure, even if it uses the same clip when a total board thickness dimension differs greatly, it can be operated by the same degree of pushing force, and versatility and usability can be improved.

  In addition, the above Example does not restrict | limit this invention at all. The clip of the present invention may be provided with the technical elements specified in claim 1, and the details can be variously changed as necessary.

It is a model exploded view which decomposes | disassembles and shows the clip of the Example of invention. It is a figure which shows the said clip in the temporary fix | stop state of members. It is a figure which shows the said clip in the final stop state of members. It is a bottom view in the temporary fix | stop state of FIG. It is a use condition figure which used the above-mentioned clip for a mode with small board thickness dimension t1. It is a use condition figure which used the above-mentioned clip for a mode with large board thickness dimension t2. It is a figure which shows the detail of the pin member of the said clip. It is a figure which shows the detail of the grommet of the said clip. It is sectional drawing of the said clip. It is explanatory drawing which shows the conventional clip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Clip 2 ... Pin member (20 is a head, 22 is a shaft part)
3 ... Grommet (30 is a leg part, 30a is an insertion hole, 35 is a buttocks part)
35 ... collar part (36 is a base end, 38 is a deformation | transformation part)
37 ... Outer peripheral part of the collar (39a is a projecting part, 39b is a convex part)
M, P ... Plate members (M1 and P1 are mounting holes)
1M, 1P ... Plate members (when total plate thickness is small)
2M, 2P ... Plate members (when total plate thickness is large)

Claims (5)

It consists of a grommet having an elastic leg portion in which an insertion hole is formed in the axial direction and a flange portion protruding from the outer periphery of the upper end of the leg portion, and a pin member having a head portion and a shaft portion provided below the head portion. The leg portion is inserted into the mounting hole of each plate member, and the shaft portion is pushed into the insertion hole by a pressing operation of the pin member to widen the leg portion. In the clip that is a mode for sandwiching the plate member between the expanded corresponding part of
The flange portion protrudes from the bottom surface of the flange portion on a peripheral portion side that is a predetermined dimension away from the base end side that is coupled to the leg portion, and the base end and the convex portion A clip that is formed in a deformable portion that can be elastically displaced up and down.   The clip according to claim 1, wherein a plurality of the convex portions are provided in a projecting manner on the lower surface of the flange portion.   The clip according to claim 1 or 2, wherein the deformed portion is formed as a plurality of thin-walled pieces by a plurality of through holes provided between the base end and the peripheral portion side. .   The said collar part has a projecting part provided in the upper surface and corresponding to the convex part of the said collar part lower surface, The said head is contact | abutted to this projecting part from Claim 1 4. The clip according to any one of 3. When the total thickness on the plate member side exceeds a predetermined value, the deforming portion is elastically displaced by a pressing operation of a pin member and abuts at least the base end side with the convex portion on the plate member upper surface. The clip according to any one of claims 1 to 4, wherein the clip is made possible.

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