JP2014095430A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener which can be easily inserted into a fitting hole and tightly fixed.SOLUTION: A fastener 1 has a strut part 21, an elastic piece 23, a spring piece 25, an operation piece 27, or the like. The spring piece 25 is a tongue-shaped member which extends from an upper end of the elastic piece 23 toward the strut part 21, and extends obliquely downward such that an extending tip on the side of the support part 21 is positioned below a base end on the side of the elastic piece 23. The spring piece 25 is in a tongue-shape having a small thickness, so the fastener 1 is not a large obstacle but held compactly when the strut part 21 and elastic piece 23 are put close to each other, and can be easily inserted into a fitting hole 9. The elastic piece 23 is close to the strut part 21 in the state of insertion into the fitting hole 9, so the spring piece 25 comes into contact with the strut part 21 and presses the elastic piece 23 in the direction away from the strut part 21. Consequently, a projection piece 35 is pressed against an inner wall surface of the fitting hole 9 with larger force.

Description

  The present invention relates to a fastener attached to a fixed member provided with an attachment hole, and particularly to a fastener attached to a thick member such as a wooden board.

  Conventionally, as a fastener for fixing an electric wire or the like in a mounting hole formed in a wooden part or the like, it has a support part and an elastic piece connected to the support part, and the support part and the elastic piece are press-fitted into the attachment hole. In addition, an elastic piece that is locked and fixed to the inner wall surface of the mounting hole by the elastic restoring force of the elastic piece is used.

  As such fasteners, in order to firmly fix them in the mounting holes, there are proposed fasteners in which predetermined positions of the support column and the elastic piece are formed thick and the elastic piece is pressed outward when the fastener is removed. (See Patent Document 1).

JP 2005-76740 A

  In the fastener having a structure in which the support portion and the elastic piece are inserted into the attachment hole as described above, when the elastic piece is brought close to the support portion into a small state and inserted into the attachment hole, friction with the inner wall surface of the attachment hole is caused. The force is reduced and insertion becomes easy. However, since the fastener of the above-mentioned patent document 1 has a support portion and an elastic piece formed to be thick, there is a limit to bringing the elastic piece close to the support portion.

  An object of the present invention is to provide a fastener that can be easily inserted into a mounting hole and can be firmly fixed.

  The invention according to claim 1, which has been made to solve the above-mentioned problem, is connected to one end side of the support column and the other end of the support column and extends to the other end side different from the one end. An elastic piece that elastically deforms in a direction that intersects the direction, and a spring piece that is connected to one of the support column and the elastic piece and extends toward the other side different from the one, and the spring piece is In the state in which the column part is inserted into the mounting hole provided in the fixed member from the one end side and the elastic piece is displaced in a direction approaching the column part, the elastic piece is brought into contact with the other and the column is It is a fastener characterized by pressing in the direction away from a part.

  Since the elastic piece is pressed in the direction in which the elastic piece is separated from the support column by the spring piece, the fastener configured in this way has a strong frictional force between the elastic piece and the inner wall surface of the attachment hole, and is firmly fixed to the attachment hole. Can do. In addition, the spring piece does not greatly hinder the close contact between the support column and the elastic piece, and they can be gathered sufficiently small, so that the frictional force with the inner wall surface of the mounting hole at the time of insertion can be reduced.

  The above-mentioned spring piece extends from the above-mentioned one, but its specific shape, width, thickness, etc. are not particularly limited, such as arm shape, tongue shape, belt shape, plate shape, rod shape, etc. Can take shape. The spring piece is in contact with the other when the support column is inserted into the mounting hole, but may be in contact with the other even when not inserted.

  The elastic piece described above may be formed with a plurality of protruding pieces protruding from a surface of the elastic piece opposite to the support portion, like the fastener according to claim 5. If the protruding piece is formed in this way, the protruding piece is locked to the inner wall surface of the mounting hole, so that a large frictional force can be generated and firmly fixed.

  According to a second aspect of the present invention, in the fastener according to the first aspect, the spring piece is inclined so that the end portion on the support column side is positioned closer to the one end side than the end portion on the elastic piece side. When the other column is moved relative to the elastic piece in the direction to be removed from the mounting hole, an external load acts on the column, An engaging portion that engages with the spring piece is formed.

  In the fastener configured as described above, the end of the spring piece on the side of the support (hereinafter referred to as end A) is longer than the end of the spring piece on the side of the elastic piece (hereinafter described as end B). It is located on one end side of the part, that is, on the opposite side to the removal direction. When the spring piece is connected to the support column, the end A is a base end connected to the support column, and the end B is a tip extending toward the elastic piece. When the spring piece is connected to the elastic piece, the end portion A is a distal end portion extending toward the support column, and the end portion B is a base end portion connected to the elastic piece.

  When the column portion moves relative to the elastic piece in the removal direction, the end A connected to the column portion or locked to the locking portion provided on the column portion moves in the removal direction. On the other hand, since the elastic piece is fixed to the mounting hole by a frictional force, the end B that is locked to or connected to the elastic piece provided on the elastic piece is restrained from moving in the removal direction. ing.

  Therefore, the spring piece is compressed between the end portion A and the end portion B, and the force of pressing the elastic piece by the spring piece is increased by the reaction force, and the frictional force between the elastic piece and the inner wall surface of the mounting hole is increased. As a result of the increase, removal of the fastener from the attachment hole can be suppressed.

  In addition, in the structure of the said Claim 2, as long as the spring piece has the positional relationship mentioned above, it may be connected with either the support | pillar part and the elastic piece. However, as described in claim 3, the elastic piece is the one and the column part is the other, that is, the spring piece extends from the elastic piece toward the column part. The force of the spring piece described above that occurs when the part moves in the removal direction can be efficiently transmitted as a force that presses the elastic piece in the direction away from the column part.

  According to a fourth aspect of the present invention, in the fastener according to any one of the first to third aspects, the operation piece is connected to the elastic piece and extends in a direction away from the support column. And

  The fastener thus configured can displace the elastic piece by operating the operation piece. As described above, the fastener according to any one of claims 1 to 3 is firmly fixed in a state in which the support column and the elastic piece are inserted into the mounting hole. However, it is possible to easily remove the fastener from the mounting hole by operating the elastic piece so that it is displaced toward the support column by the operating piece.

It is a figure which shows the fastener of an Example, Comprising: (A) is a front view, (B) is a top view, (C) is a bottom view, (D) is a left view, (E ) Is a right side view, (F) is a rear view, and (G) is a front view in a state where a clamp portion is closed. It is a figure which shows the fastener of an Example, Comprising: (A) is the perspective view seen from upper left, (B) is the perspective view seen from upper right, (C) The perspective view seen from lower left (D) is a perspective view seen from the lower right. (A) is a front view of the fastener of an Example, (B) is AA sectional drawing of FIG. 3 (A), (C) is BB sectional drawing of FIG. 3 (A). (A) is a front view which shows the state which inserted the fastener of the Example into the attachment hole, (B) is a front view which shows the state which moved the support | pillar part upwards. It is a front view which shows the state which inserted the fastener of the Example into the attachment hole and picked up the operation piece. (A)-(C) are front views which show the fastener of a modification.

Embodiments of the present invention will be described below with reference to the drawings.
[Example]
(1) Whole structure The fastener 1 of a present Example is provided with the clamp part 3 and the fixing | fixed part 5, as shown to FIG. 1 (A)-(G) and FIG. 2 (A)-(D). In this case, it is integrally formed of an elastic synthetic resin (for example, PP, PA, PE, PS, etc.).

  The clamp portion 3 has a locking groove portion 13 provided at one end of the base portion 11, an arm-like portion 15 extending from the other end of the base portion 11, and an insertion portion 17 provided at the tip of the arm-like portion 15. Then, by inserting the insertion portion 17 into the locking groove portion 13, a gripping ring portion can be formed as shown in FIG. 1 (G), and electric wiring or the like can be held therein.

The fixing unit 5 includes a support column 21, an elastic piece 23, a spring piece 25, an operation piece 27, and the like.
The column portion 21 is a plate-like member having a length in the vertical direction, and an elastic piece 23 is connected to the lower end, and the base portion 11 of the clamp portion 3 is connected to the upper end. The support column 21 is provided with a locking groove 31 and a locking projection 33.

  The up-and-down directions here are only used for convenience in order to facilitate understanding of the invention, and are merely definitions for indicating the relative positional relationship between the respective parts, and do not prescribe the attachment direction of the fastener 1 or the like. . Moreover, the lower end mentioned above in the support | pillar part 21 respond | corresponds to the one end in this invention, and the upper end mentioned above respond | corresponds to the other end in this invention.

  A pair of elastic pieces 23 are formed in such a positional relationship as to sandwich the column portion 21, and the lower ends thereof are connected at the lower end of the column portion 21 and extend upward. The supporting column 21 and the pair of elastic pieces 23 have a bowl shape that faces downward. The elastic piece 23 is elastically deformed in a direction intersecting with the axial direction (vertical direction) of the support column 21. From the surface of the elastic piece 23 on the side opposite to the column part 21, a plurality of protruding pieces 35 with thin tips are protruding.

  The spring piece 25 is a tongue-like member extending from the upper end of the elastic piece 23 toward the support column 21. Further, the spring piece 25 extends so as to incline downward so that the distal end extending toward the support column 21 is positioned below the base end on the elastic piece 23 side.

The operation piece 27 is connected to the upper ends of each of the pair of elastic pieces 23, extends in a direction away from the support column 21, and has a tip bent upward.
Details of the shapes of the support column 21 and the spring piece 25 will be described with reference to FIGS.

  The locking groove 31 is formed on both surfaces of the support column 21. The locking projection 33 is provided so as to be continuous from the lower end of the locking groove 31, and as shown in FIG. 3B, the upper surface of the locking projection 33, that is, the lower end surface of the locking groove 31, is the locking groove. The width is the sum of the depth 31 and the protrusion height of the locking projection 33. The locking groove 31 and the locking projection 33 are an example of a locking portion in the present invention.

  The locking grooves 31 provided on both surfaces of the support column 21 are formed so as to be shifted in the width direction of the support column 21 (the longitudinal direction of the cross section of the support column 21 in FIGS. 3B and 3C). Thereby, the part where the support | pillar part 21 becomes thin can be disperse | distributed, and the intensity | strength of the support | pillar part 21 can be kept high. In addition, the spring piece 25 facing each locking groove 31 is also provided by being shifted in the width direction according to the position of the locking groove 31.

(2) Action and Effect Since the spring piece 25 has a tongue shape with a small thickness, the fastener 1 having the above-described configuration is not greatly hindered when the column portion 21 and the elastic piece 23 are brought close to each other, and can be gathered small. Further, since the spring piece 25 enters the locking groove 31, the whole can be further reduced. Therefore, when inserting the support | pillar part 21 and the elastic piece 23 in an attachment hole, the frictional force with the inner wall face of an attachment hole can be made small.

  A state in which the fastener 1 is inserted into the attachment hole 9 provided in the fixed member 7 is shown in FIG. 4A, 4B, and 5, only the fixed member 7 is shown as a cross-sectional view for easy understanding.

  In a state where the support column 21 and the elastic piece 23 are inserted into the mounting hole 9, the pair of elastic pieces 23 are elastically displaced in the direction of the support column 21 so that the interval between them is narrowed. The protruding piece 35 is pressed toward the inner wall surface of the mounting hole 9 by the elastic restoring force.

  And since the elastic piece 23 adjoins the support | pillar part 21 as mentioned above, the spring piece 25 contacts the support | pillar part 21, and presses the elastic piece 23 in the direction away from the support | pillar part 21. FIG. Therefore, the force with which the protruding piece 35 presses the inner wall surface of the mounting hole 9 is increased, and as a result, the frictional force between the elastic piece 23 and the inner wall surface of the mounting hole 9 is increased. Can be fixed.

In addition, since it contacts with the inner wall surface of the attachment hole 9 with the protruding piece 35 with a sharp tip, a larger frictional force can be generated than when the protruding piece 35 is not provided.
By the way, an external load such as pulling out the support column 21 from the attachment hole 9 is applied, such as when the clamp unit 3 is pulled, so that the support column 21 is relatively in the extraction direction (upward direction) of the elastic piece 23. 4B, the tip (lower end) of the spring piece 25 is locked to the lower end surface of the locking groove 31 and pressed upward.

  On the other hand, the base end (upper end) of the spring piece 25 is connected to the elastic piece 23, and the elastic piece 23 is locked to the mounting hole 9 through the protruding piece 35 with high frictional force. Therefore, even if the support column 21 moves in the removal direction, the base end of the spring piece 25 is difficult to move in the removal direction, and as a result, the lower end of the spring piece 25 approaches the upper end.

  Thus, the spring piece 25 is compressed, and the elastic piece 23 is further strongly pressed outward by the elastic restoring force. As a result, the frictional force with the mounting hole 9 is further increased, and the column portion 21 and the elastic piece 23 are suppressed from being removed from the mounting hole 9.

  As described above, the tip of the spring piece 25 is locked to the lower end surface of the locking groove 31, but the lower end surface of the locking groove 31 is connected to the locking projection 33 and has a large area. The tip of the spring piece 25 is easily locked, and it is convenient that the locking is prevented from being released.

  In addition, when removing the fastener 1, as shown in FIG. 5, it is good to operate so that a pair of operation piece 27 may mutually approach. Since the operating piece 27 is thicker than the spring piece 25 to increase its strength, when the operating pieces 27 are brought close to each other, the elastic piece 23 is not defeated by the force of pressing the elastic piece 23 of the spring piece 25. It can be brought close to the part 21.

  As described above, in the state where the support column 21 and the elastic piece 23 are inserted into the mounting hole 9, their removal is suppressed, but by operating the operation piece 27 so as to approach each other, the elastic piece 23 is It is possible to easily weaken the pressure on the inner wall surface of the mounting hole 9 of the protruding piece 35 in the vicinity of the column portion 21, and the fastener 1 can be easily removed.

  In addition, when inserting the fastener 1 in the attachment hole 9, it can insert smoothly by making the operation pieces 27 adjoin. Thus, by operating the operation piece 27 and inserting / removing the fastener 1, wear of the attachment hole 9 can be suppressed, and the fastener 1 can be firmly fixed even if the insertion / removal is repeated.

[Modification]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various forms can be taken as long as they belong to the technical scope of the present invention.

For example, in the above-described embodiment, the spring piece 25 is connected to the elastic piece 23 and has a configuration in which the tip extends and inclines so that the tip faces downward. However, the fixing portion 5 may have a configuration other than the above. .
Specifically, as in the fastener 1a shown in FIG. 6A, the spring piece 25a may extend upward from the elastic piece 23a. The fastener 1a configured as described above can be firmly fixed to the mounting hole 9 by the spring piece 25a pressing the elastic piece 23a outward as in the fastener 1 of the embodiment.

  When the locking groove 31a is formed in the column 21a, the spring piece 25a and the locking groove 31a are not locked even if the column 21a moves in the direction in which the column 21a is removed, but the spring piece 25a is locked. Since it can be accommodated in the groove 31a and reduced in size, it can be easily inserted into and removed from the mounting hole.

  Moreover, you may comprise like the fastener 1b shown in FIG.6 (B). The fastener 1b is inclined so that the spring piece 25b extends from the column portion 21b toward the elastic piece 23b, and the base end on the column portion 21b side is positioned below the extended tip. The end of the operation piece 27 on the support column 21b side is formed as a locking projection 29 protruding inward.

  Similarly to the fastener 1, the fastener 1 b configured as described above can be firmly fixed to the mounting hole 9. Further, when the column portion 21b moves in the direction in which it is removed, the tip of the spring piece 25b is locked to the locking projection 29, so that the elastic piece 23b can be pressed away from the column portion 21b, and the elastic piece 23b and The removal of the column portion 21b can be suppressed.

  Moreover, the structure which the spring piece 25c protrudes below from the support | pillar part 21c may be sufficient like the fastener 1c shown in FIG.6 (C). The fastener 1c configured as described above can be firmly fixed to the mounting hole 9 similarly to the fastener 1a.

  Moreover, in the said Example, although the structure provided with two elastic pieces 23 was illustrated, the structure provided with one elastic piece may be sufficient, and the structure provided with three or more elastic pieces may be sufficient. . In the case where three or more are provided, for example, it is conceivable that the support column is a prism having a polygonal cross section and the elastic pieces are arranged at equal intervals around the axis of the support column.

  Moreover, in the said Example, although the structure in which the latching groove 31 and the latching protrusion 33 were formed in the support | pillar part 21 was illustrated, it is the structure by which only one of the latching groove 31 or the latching protrusion 33 is provided. Alternatively, the effect of locking the spring piece 25 may not be obtained, but a configuration in which none is provided may be employed.

  Moreover, although the structure which provides the clamp part 3 in the upper end of the support | pillar part 21 was illustrated in the said Example, it is not restricted to the clamp part 3, It can replace with the clamp part 3 and can provide various members.

DESCRIPTION OF SYMBOLS 1,1a, 1b, 1c ... Fastener, 3 ... Clamp part, 5 ... Fixing part, 7 ... Fixed member, 9 ... Mounting hole, 11 ... Base part, 13 ... Locking groove part, 15 ... Arm-like part, 17 ... Insertion , 21 .. column part, 23 .. elastic piece, 25 .. spring piece, 27 .. operation piece, 29 .. locking projection, 31 .. locking groove, 33 .. locking projection, 35.

Claims (5)

A strut,
An elastic piece connected to one end side of the support column and extending to the other end side different from the one end, and elastically deforming in a direction intersecting the axial direction of the support column;
A spring piece connected to one of the support column and the elastic piece and extending toward the other side different from the one;
The spring piece comes into contact with the other in the state where the support piece is inserted into the mounting hole provided in the fixed member from the one end side and the elastic piece is displaced in a direction approaching the support post. A fastener that presses a piece in a direction away from the support column. The spring piece extends so as to incline so that the end portion on the column portion side is located on the one end side with respect to the end portion on the elastic piece side,
On the other side, when an external load acts on the support column and the support column moves relative to the elastic piece in the direction of removal from the mounting hole, it is locked with the spring piece. The fastener according to claim 1, wherein a locking portion is formed. The fastener according to claim 2, wherein the elastic piece is the one side and the strut portion is the other side. The fastener according to any one of claims 1 to 3, further comprising an operation piece connected to the elastic piece and extending in a direction away from the support column. The said elastic piece is formed with the some protrusion piece which protrudes from the surface on the opposite side to the said support | pillar part in the said elastic piece. The Claim 1 characterized by the above-mentioned. fastener.

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