JP2010019388A - Fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastener, which is used for fastening a plurality of members having a plate part with a through-hole, with a high retaining force. <P>SOLUTION: The fastener 1 includes a female member 2 inserted in the through-hole with the position of the through-hole H being consistent therewith and the plurality of members to be fastened laminated, and having at least two expansion pieces 11; and a male member 3 provided to the female member so as to be relatively freely shifted and having a wedge part 32 engaged with the female member. The expansion piece includes an engaging recessed part 24 engaged with both end faces of the laminated member to be fastened when being expanded in the through-hole, and the wedge part is inserted between the expansion pieces to expand the expansion pieces when the male member is shifted on one side to the female member. Thus, the rigidity of the engaging part provided on the female member is secured, and simultaneously a suitable engaging portion to the through-hole drilled in the sheet part of the member to be fastened is secured. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fastener used for fastening a plurality of members to be fastened having a plate-like portion having a through hole.

  A female member to be inserted into the through-holes of the stacked plate-like portions as a fastener for fastening interior parts of an automobile having plate-like portions with through-holes to each other, and a head of the female member A male member that is inserted into an insertion hole extending in the axial direction of the male member, and by inserting the male member, a locking portion provided in the female member or the like widens and locks the peripheral portion of the through hole, The thing which pinches and fixes these plate-shaped parts to the thickness direction by the head part and latching | locking part of a female member has prevailed.

  As this type of fastener, for example, a female member has a shaft portion and a head connected to one end thereof, and an insertion hole extending in the axial direction of the female member extends along the axial direction on the peripheral surface of the shaft portion. The male member is composed of a clamp spring having a triangular portion formed so as to project outward from the central fissure, and communicates with a pair of central fissures (slits) that are opened in a pair. There is known a technique in which a stacked metal plate is sandwiched and fixed by a stepped shoulder portion and a head of a female member (see Patent Document 1).

  In addition, for example, a pair of elastically deformable locking portions is provided on the shaft portion of the female member, and the locking portion has the base end portion as a fixed point when the male member is inserted, and the free end side is outward. A material that is elastically deformed so as to expand and clamps a fixed object between a locking portion and a head of a female member is known (see Patent Document 2).

Further, for example, a synthetic resin pin (male member) having a head portion and a shaft portion, a synthetic resin grommet (female member) having a flange portion and a trunk portion, an inward support arm and an outward clamping piece, A pin holding portion of the pin that supports the inwardly supporting arm of the pinching member in the axial direction, and the pinching member on the side of the pinching pin toward the outside Forming a storage chamber for storing in the direction and a pressing surface for pressing the outward holding piece of the holding body outward, and forming an opening window on the grommet body where the outward holding piece of the holding body appears and disappears. In addition, there is known a method in which a fixed object is sandwiched between a flange portion of a synthetic resin grommet and an outward clamping piece of a metal clamping body protruding outward from the opening window (see Patent Document 3).
Japanese Utility Model Publication No. 53-42669 JP 2006-161890 A Japanese Patent No. 396738

  By the way, it is desired that the fastener as described above can be configured relatively easily and can secure a large removal force (a holding force to prevent the removal from the through hole). In the prior art described in Patent Document 1, it is conceivable to increase the rigidity of the clamp spring having a triangular portion or increase the outward protrusion amount in order to increase the extraction force. However, when the removal force is increased as described above, there is a problem that the insertion force is increased and it is difficult to insert the male member into the female member. Even if the male member can be inserted into the female member, there is a problem that it becomes difficult to pull out the male member from the female member when it is necessary to remove the fastener.

  Moreover, in the prior art described in the said patent document 2, in order to raise extraction force, it is possible to increase the allowance between a latching | locking part and the peripheral part of a through-hole. However, since the locking portion is configured to elastically deform so that the free end side spreads outward with the base end portion as a fixed point, the locking portion is prevented from being damaged and rigid (securing locking force). In consideration of this, there is a problem that it is difficult to greatly increase the engagement allowance (that is, the amount of elastic deformation).

  Moreover, in the prior art described in Patent Document 3, since a metal clamping body is used to clamp a fixed object, a relatively large extraction force can be obtained, but the number of parts of the fastener increases. There was a problem that the structure became complicated.

  The present invention has been devised in view of the problems of the prior art as described above, and has a through-hole drilled in the plate-like portion of the fastened member while ensuring the rigidity of the locking portion provided in the female member. It aims at providing the fastener which implement | achieves a big extraction force by making it possible to ensure the appropriate engagement allowance with respect to a hole.

  1st invention made | formed in order to solve the said subject is the fastener (1) used for fastening of the to-be-fastened member which has the plate-shaped part (P1, P2) in which the through-hole (H) was pierced. And a female member (2) having at least two spreading pieces (11) inserted through the through hole in a state where the positions of the through holes coincide with each other and the plurality of fastened members are stacked. And a male member (3) having a wedge portion (32) engaged with the female member, the flared piece being expanded within the through hole. When opened, it has engaging recesses (24) that engage with both end surfaces of the stacked members to be fastened, and the wedge portion is formed when the male member moves to one side with respect to the female member. In addition, the expansion piece is inserted between the expansion pieces to expand the expansion pieces.

  As a second invention made to solve the above-mentioned problems, the female member connects the expanded pieces to each other in a closed state, and elastically connects pieces that elastically deform when the expanded pieces are expanded ( 12).

  According to a third aspect of the present invention for solving the above-described problems, the elastic connecting piece has a curved portion that bulges in a direction substantially orthogonal to the moving direction of the male member, and the male member In this case, a restricting portion (33a) is provided which slides on the bulging side of the bending portion and displaces the bending portion to the anti-bulging side.

  As a fourth invention made to solve the above-mentioned problems, the male member has a pair of legs (33) sandwiching the wedge part, and each of the leg parts from the wall facing the wedge part, respectively. It can be set as the structure which consists of a pair of convex piece (33a) which protrudes and pinches | interposes the said elastic connection piece.

  As 5th invention made | formed in order to solve the said subject, it is set as the structure which the said expansion piece has a cover part (22a) which covers at least one part of the said male member in the insertion direction side to the said through-hole. Can do.

  As a sixth invention made to solve the above problems, the male member may have a temporary fastening part (41) for sandwiching the spread piece in a closed state together with the wedge part.

  According to the first aspect of the invention, since the expanding piece of the female member (the locking portion with the member to be fastened) is configured to be easily displaceable without requiring its own elastic deformation, it is provided on the female member. It is possible to secure an appropriate engagement margin with respect to the through-hole drilled in the plate-like portion of the member to be fastened while ensuring the rigidity of the locking portion to be achieved, and to realize a large extraction force with a simple configuration it can.

  According to the second aspect of the invention, the spreading and closing (non-expanding) operations of the spreading piece can be realized with a simple configuration. Further, since the spread piece and the elastic connection piece can be integrally formed, an increase in the number of parts can be avoided.

  According to the third aspect, when the male member is moved relative to the female member, if the sliding contact position of the restricting portion exceeds a predetermined position of the bending portion, the elastic force of the displaced bending portion is increased. It becomes possible to act as an auxiliary force in the moving direction.

  According to the fourth aspect of the invention, it is possible to prevent the unintended elastic connecting piece (curved portion) from being displaced and stably generate the elastic force. Further, since the elastic connecting piece is housed inside the leg portion regardless of the displacement, the elastic connecting piece is prevented from being damaged due to contact with the member to be fastened.

  According to the fifth aspect of the invention, since the distal end side (the insertion direction side to the through hole) of the male member is protected by the covering portion, the male member is on the side opposite to the insertion direction to the through hole (fastening release side). It is possible to prevent the fastening of the fastened member (that is, the spread state of the spread piece) from being released by being pushed.

  According to the sixth invention, it is possible to hold the male member and the female member in a temporarily fastened state, and the user simply inserts the temporarily fastened fastener into the through-hole of the fastened member, Fastening of a member to be fastened can be performed easily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, the terms “front”, “back”, “up”, “down”, “left” and “right” indicating directions follow the direction of the arrows shown in FIG. 1 unless otherwise specified. To do.

  1A and 1B are perspective views showing an unfastened state and a fastened state of a fastener according to the present invention, respectively, and FIGS. 2A to 2C are a front view, a side view, and a plan view of a female member constituting the fastener, respectively. 3A to 3C are a side view, a longitudinal sectional view, and a bottom view of a male member constituting the fastener, respectively.

  The fastener 1 is used for fastening a plurality of fastening members (not shown) (for example, a rear upper wall and a cowl top cover of an automobile engine), and plate-like portions of the fastening members are laminated. In this state, the female member 2 is inserted into a through hole penetrating these plate-like portions, and the male member 3 is provided so as to be relatively movable with respect to the female member 2. The female member 2 and the male member 3 are temporarily fastened to each other before the fastener 1 is used. As shown in FIG. 1A, the female member 2 and the male member 3 are not attached to each other even when the fastener 1 is in the non-fastened state. Are engaged with each other. When the fastener 1 is in the fastened state, the male member 3 moves downward from the initial position in FIG. 1A toward the female member 2 as shown in FIG. 1B.

  As shown in FIGS. 2A to 2C, the female member 2 is connected to a pair of substantially symmetrical expanding pieces 11 provided so as to be expandable in the left-right direction, and the expanding pieces 11 in a closed state. And an elastic connecting piece 12 that is elastically deformed during the spreading operation of the spreading piece 11.

  The spread piece 11 has a head portion 21 and a leg portion 22, and a constricted portion 23 having a reduced width is provided between the head portion 21 and the leg portion 22. An engaging recess 24 is formed. The engaging recess 24 engages with both end surfaces of the member to be fastened (laminated plate-like portions) when the expanding piece 11 is widened in the through hole of the member to be fastened.

  As shown in FIG. 2C, the head 21 of each spread piece 11 extends in the left-right direction. The left and right widths (the lengths of the left and right ends) of the two heads 21 in the expanded piece 11 in the closed state are larger than the diameters of the through holes so that the heads 21 can come into contact with the periphery of the through holes of the fastened members. It is set large.

  The leg portions 22 each have a substantially U-shape opposite to the engagement recess 24, and a space for accommodating the elastic connecting piece 12 is defined inside the leg portions 22. The bottom wall 22a of the leg portion 22 is formed so as to have a substantially semicircular shape in plan view, and as shown in FIGS. 2A and 2B, the outer periphery of the bottom wall 22a is made easy to insert the female member 2 into the through hole. The surface is tapered. The left and right widths of the two leg portions 22 in the expanded piece 11 in the closed state are set to be equal to or less than the diameter of the through hole so that the leg portion 22 can be inserted into the through hole of the fastened member.

  The elastic connecting piece 12 has a pair of left and right vertical portions 12a that are substantially J-shaped and a connecting portion 12b that connects the lower ends of the vertical portions 12a. Each upper end of the vertical portion 12a is connected to the lower surface 22b of the upper wall of the leg portion 22 of the spreading piece 11, and hangs downward. The vertical portions 12a are arranged so that the positions in the front-rear direction are different from each other. The left vertical portion 12a (see FIG. 2B) is located on the rear side of the leg portion 22, while the right vertical portion 12a is the leg portion. 22 is located on the front side. Accordingly, the connecting portion 12b that connects the vertical portions 12a extends substantially in the front-rear direction, as shown in FIG. 2C. As shown in FIG. 2A, the elastic connecting piece 12 has a substantially U shape with the upper end slightly approached inward as a whole in front view, and thereby the lower sides of the two vertical portions 12a bulge to the left and right respectively. . Further, when the expanding piece 11 is expanded, the elastic connecting piece 12 is elastically deformed so that both upper ends of the U-shape expand left and right by bending the vertical portion 12a and twisting the connecting portion 12b.

  As shown in FIGS. 3A to 3C, the male member 3 is arranged so as to sandwich a substantially disc-shaped head portion 31, a wedge portion 32 that hangs down from the approximate center of the head portion, and the wedge portion 32 in the front-rear direction. And a pair of symmetrically shaped leg portions 33.

  A groove 35 extending in the left-right direction is provided on the bottom surface of the head 31. As shown in FIG. 3B, the groove 35 is connected to the center of the upper end of the wedge portion 32, and on the left and right sides of the wedge portion 32, the head of the spread piece 11 is located when the fastener 1 is in the fastened state. The part 21 is accommodated. The diameter of the head 31 is set so as to substantially match the left and right widths of the two heads 21 in the expanded piece 11 in the closed state.

  The wedge portion 32 includes a tip wall 32a protruding toward the female member 2, a straight portion 32b continuous above the tip wall 32a, and a tapered wall 32c continuous above the straight wall 32b and gradually widened upward. Have. As shown in FIG. 3B, the angle α of the tip wall 32a is provided so as to correspond to the groove portion 21a (see FIGS. 2A and 2C) provided in the head portion 21 of the spreading piece 11, and the tapered wall. The inclination angle part β of 32c is the same as the angle of the tip wall 32a.

  As shown in FIG. 3C, the leg portion 33 is provided so as to form a substantially arc shape when viewed from the bottom, and a protruding piece 33 a extending inward is formed on one end side of each leg portion. The elastic connecting piece 12 of the female member 2 is accommodated in the space below the wedge portion 32 sandwiched between the two leg portions 33 when the fastener 1 is in a fastened state (see FIGS. 1A and 1B). Thereby, the elastic connecting piece 12 is not only covered in the left-right direction by the leg portion 22 of the spreading piece 11 but also protected by being covered in the front-rear direction by the leg portion 33 of the male member 3. When the fastener 1 is in the fastened state, the lower portion of the elastic connecting piece 12 is protected by the bottom wall 22 a of the leg portion 22 of the female member 2.

  Next, the detail of the fastening operation | movement of the to-be-fastened member by the fastener of the said structure is demonstrated. 4A and 4B are cross-sectional perspective views showing the fasteners in a non-fastened state and a fastened state.

  As shown in FIG. 4A, the fastener 1 is inserted through the through hole H in a state where the positions of the through holes H coincide with each other and the two plate-like parts (fastened members) P1 and P2 are laminated. At this time, the spread piece 11 is in a closed state, and its head 21 comes into contact with the upper surface of the upper plate-like portion P1. As described above, the female member 2 and the male member 3 are temporarily secured to each other. In this temporarily fixed state, the wedge portion 32 of the male member 3 is fitted into the groove portion 21 a of the female member 2, and the L-shaped pieces 41 respectively provided on the inner surface of the leg portion 33 of the male member 3 are the legs of the female member 2. This is realized by engaging the portion 22. The L-shaped piece 41 has a vertical portion 41 a sandwiched between the constricted portions 23 of the two expanded pieces 11, and a horizontal portion 41 b that engages the lower surface 22 b of the upper wall of the leg portion 22 of the expanded piece 11. Stop.

  Since the female member 2 and the male member 3 are in the temporarily fastened state, the user need only push the head 31 of the male member 3 into the female member 2 side when performing fastening. When the user pushes the head 31, the male member 3 moves downward toward the female member 2 as shown in FIG. 4B. Thereby, the wedge part 32 of the male member 3 further enters between the expanded pieces 11, and the expanded pieces 11 are moved substantially horizontally and substantially parallel to the left and right to be in the expanded state. At this time, the upper and lower surfaces 24a and 24b of the engaging recess 24 are in contact with the upper surface of the plate-like portion P1 and the lower surface of the plate-like portion P2, and the side surface 24c is in contact with the inner peripheral surface of the through hole H. The shape portions P1 and P2 are stably fixed. In this case, it is possible to increase the engagement margin with the peripheral portion of the through hole H by ensuring a larger length in the left-right direction of the upper and lower surfaces 24a, 24b of the engagement recess 24. At this time, the straight wall 32b of the wedge portion 32 is in close contact with the inside of the constricted portion 23, and the tapered wall 32c is fitted into the groove portion 21a of the female member 2, so that the fastening state of the fastener 1 is stable. Retained. In this case, the curvature of the peripheral surface of the constricted portion 23 may be set similarly to the curvature of the through hole.

  Further, during the fastening operation of the fastener, as shown in FIGS. 5A, 5B, and 2B, the convex piece 33a in the leg portion 33 of the male member 3 is replaced with the curved portion in the vertical portion 12a of the elastic connecting piece 12. Make sliding contact with the bulging side. Thereby, when the male member 3 moves relative to the female member 2, the curved portion of the elastic connecting piece 12 pressed by the convex piece 33a is temporarily displaced inward (anti-bulging side).

  More specifically, when the male member 3 moves from the initial position in FIG. 5A to the fixed position in FIG. 5B, the sliding contact position of the convex piece 33a exceeds the middle C (the most bulged position) of the curved portion. The elastic force of the displaced bending portion acts as an auxiliary force that moves the male member 3 to the fixed position side. On the other hand, when the fastening of the fastener 1 is released and the male member 3 returns from the fixed position of FIG. 5B to the initial position of FIG. 5A, when the sliding contact position of the convex piece 33a exceeds the middle C of the curved portion, The elastic force of the displaced bending portion acts as an auxiliary force that moves the male member 3 toward the initial position. Thereby, the user can easily and reliably perform the fastening work and the fastening release work. The fastening 1 can be released by inserting a predetermined tool into the groove 35 of the male member 3 in which the head 21 of the female member 2 is accommodated, for example.

  Further, the convex piece 33a prevents the elastic connecting piece 12 from spreading outward, and at the time of releasing the fastening, the elastic connecting piece 12 is moved inward (with the leg portion 33 of the male member 3 and the leg portion 22 of the female member 2). It plays the role of securely containing it as it is drawn into the space defined. Thereby, it is prevented that the elastic connection piece 12 contacts with a to-be-fastened member etc., and is damaged.

  In this way, since the expanding piece 11 of the female member 2 is configured to be easily displaceable without requiring its own elastic deformation, the fastened member while securing the rigidity of the locking portion with the fastened member. It is possible to secure an appropriate engagement allowance for the through holes H of the plate-like parts P1 and P2, and a large extraction force can be realized with a simple configuration. In particular, since the spread pieces 11 are configured to move in parallel so as to be separated from each other, it is easy to adjust the engagement allowance, and the engagement recesses 24 can be stably engaged with both end surfaces of the fastened member. .

  In addition, since the gap is not generated between the straight wall 32b of the wedge portion 32 and the inner surface of the constricted portion 23, the engagement recess 24 can be prevented from creep deformation and the fastening state can be stably maintained. The reuse of the fastener 1 is also facilitated. Further, since the leg portion is not configured to be elastically deformed and expanded outward as in the prior art, it is not necessary to ensure the length of the leg portion 22 of the female member 2 and the leg portion 33 of the male member 3. There is also an advantage that the tool 1 can be configured compactly. Furthermore, unlike the locking portion found in the prior art, the expanding piece 11 does not need to be bent, so that the strength of the engaging recess 24 can be easily increased by selecting an appropriate material.

  Further, since the expanding pieces 11 are connected to each other by the elastic connecting pieces 12 in the closed state, the expanding and closing operations of the expanding pieces 11 can be realized with a simple configuration, and the expanding pieces 11 and the elastic connecting pieces can be realized. By integrally forming 12, an increase in the number of parts of the fastener 1 can be avoided.

  In the fastened fastener 1, the male member 3 is covered with the bottom wall 22 a of the leg portion 22 of the female member 2, so that the male member 3 becomes the through hole. It is possible to prevent the fastening of the fastened member (that is, the expanded state of the expanded piece 11) from being released by being pushed in the direction opposite to the insertion direction.

  Although the present invention has been described in detail based on specific embodiments, these embodiments are merely examples, and the present invention is not limited to these embodiments. For example, the number and shape of the expanding pieces that the female member has can be variously changed, and the connection mode of the expanding pieces by the elastic connecting pieces can also be changed. The shape of the engaging recess formed in the female member can be variously changed according to the shape of the through hole of the plate-like portion, and the through-hole of the plate-like portion in the member to be fastened is not limited to a circle but is arbitrary. Can be provided. As long as the member to be fastened to which the fastener of the present invention is applicable has at least a plate-like portion having a through-hole, any device or instrument is applicable.

The perspective view which shows the non-fastened state of the fastener which concerns on this invention The perspective view which shows the fastening state of the fastener which concerns on this invention Front view of female member Side view of female member Top view of female member Side view of male member Vertical section of male member Male member bottom view Cross-sectional perspective view showing the non-fastened state of the fastener Cross-sectional perspective view showing the fastening state of the fastener Sectional drawing which shows the non-fastened state of a fastener Sectional drawing which shows the fastening state of a fastener

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fastener 2 Female member 3 Male member 11 Spreading piece 12 Elastic connection part 12a Vertical part 12b Connection part 21 Head part 21a Groove part 22 Leg part 22a Bottom wall (cover part)
23 Constricted part 24 Engagement recessed part 31 Head part 32 Wedge part 32a Tip wall 32b Straight wall 32c Tapered wall 33 Leg part 33a Convex piece (regulation part)
35 Groove 41 L-shaped piece (temporary fastening part)
H Through-hole P1, P2 Plate-shaped part

Claims (6)

A fastener provided for fastening of a plurality of members to be fastened having a plate-like portion with a through-hole formed therein,
The through holes are inserted in the state where the positions of the through holes coincide with each other and the plurality of fastened members are laminated,
A female member having at least two spreading pieces, and a male member provided with a wedge portion that is provided so as to be relatively movable with respect to the female member and engages with the female member;
The expansion piece has an engagement recess that engages with both end surfaces of the stacked members to be fastened when the expansion piece is expanded in the through hole,
The said wedge part is inserted between the said expansion pieces, when the said male member moves to the one side with respect to the said female member, The fastener which expands the said expansion piece.   2. The fastening according to claim 1, wherein the female member further includes an elastic connecting piece that connects the expanded pieces in a closed state and elastically deforms when the expanded pieces are expanded. Ingredients. The elastic connecting piece has a curved portion that bulges in a direction substantially perpendicular to the moving direction of the male member,
3. The fastener according to claim 2, wherein the male member has a restricting portion that slidably contacts the bulging side of the bending portion during the movement and displaces the bending portion to the anti-bulging side. . The male member has a pair of legs that sandwich the wedge.
4. The fastener according to claim 3, wherein the restricting portion includes a pair of convex pieces that protrude from walls facing the wedge portions of the leg portions and sandwich the elastic connecting piece.   The said expansion piece has a cover part which covers at least one part of the said male member in the insertion direction side to the said through-hole, The fastener in any one of Claims 2-4 characterized by the above-mentioned.   The said male member has a temporary fastening part which clamps the said expansion piece in a closed state with the said wedge part, The fastener in any one of Claims 1-5 characterized by the above-mentioned.

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