JP4261293B2 - Fixture - Google Patents

Description

  The present invention relates to a fixture for fixing members such as electric wires and printed wiring boards, and more particularly to a fixture capable of fixing those members also in a bottomed hole formed in a wood part or the like.

  Conventionally, as a fixture for fixing an electric wire or the like in a bottomed hole formed in a wood part or the like, a leg part inserted into the bottomed hole and protruding from the leg part in the outer peripheral direction, and elastic when inserting the leg part A spring portion that is deformed and pressed toward the inner wall surface of the bottomed hole is considered. In this type of fixture, when the leg portion and the spring portion are press-fitted into the bottomed hole, the spring portion is pressed toward the inner wall surface of the bottomed hole, and the leg portion is bottomed by the force with which the spring portion presses the inner wall surface. Fixed in the hole. If the clamp etc. which can fix an electric wire etc. are provided in the wooden part surface side edge part of a leg part, an electric wire etc. can be fixed to a wooden part etc.

  However, if the spring part has a simple leaf spring structure, it is necessary to increase the insertion force when the leg part is inserted into the bottomed hole if the spring constant is increased to make the leg part difficult to separate from the bottomed hole. is there. When a large insertion force is required, workability of fixing work such as an electric wire using the fixture is also reduced.

Therefore, it is considered that the spring part is formed in an eccentric spherical shape, and when the leg part is removed, the spring part is rotated in the direction in which the outer diameter increases to press against the inner wall surface of the bottomed hole. In this case, the force required for detachment (hereinafter referred to as detachment force) relative to the insertion force can be increased, and good fixability can be obtained while ensuring workability (for example, see Patent Document 1).
JP 59-86782 A

  However, in order to rotate the spring portion as described above, the outer peripheral surface of the spring portion must be sufficiently smooth, and the spring portion must be sufficiently pressed against the inner wall surface of the bottomed hole. For this reason, in the above fixture, when the spring constant of the spring portion decreases due to a change over time or the like, the outer peripheral surface of the spring portion slides with respect to the inner wall surface of the bottomed hole and the spring portion does not rotate well, and the detachment force is sufficiently increased. There was a possibility that it could not be enlarged.

  Therefore, the present invention has been made with the object of providing a fixture that can increase the detachment force relative to the insertion force and has excellent durability.

In order to achieve the above object, the invention according to claim 1 is characterized in that a leg portion inserted into the hole portion, and protrudes from the leg portion in an outer peripheral direction, and is elastically deformed when the leg portion is inserted, so that the inside of the hole portion. A spring part pressed against the wall surface, wherein the tip part of the spring part is formed thicker than the other part of the spring part, and the tip part of the spring part and the other part The connecting portion with the portion has an inclined surface on the side facing the leg portion when the spring portion is elastically deformed, is formed on the outer periphery of the leg portion, and the leg portion is at least the distal end portion of the spring portion. And a protrusion having an inclined surface that contacts the inclined surface and presses the spring portion in the outer peripheral direction when moving in the removal direction.

In the present invention configured as described above, when the leg portion moves in the removal direction with respect to at least the distal end portion of the spring portion, the inclined surface of the protrusion formed on the outer periphery of the leg portion presses the spring portion in the outer peripheral direction. . By this pressing, the spring portion is pressed more firmly against the inner wall surface of the hole portion, and the separation force is increased. That is, the detachment force is greater than the insertion force.
Further, in the present invention, the tip of the spring part is formed thicker than the other part of the spring part, and the inclined surface provided in the connecting part between the tip part and the other part and the inclined surface provided in the protrusion When the two come into contact with each other, the projection presses the spring portion in the outer circumferential direction. For this reason, when a leg part moves to an extraction direction with respect to at least the front-end | tip part of a spring part, the operation | movement which presses a spring part to an outer peripheral direction by a protrusion can be performed more smoothly and reliably. For this reason, the detachment force is further increased with respect to the insertion force.

  The invention described in claim 2 is characterized in that, in addition to the configuration described in claim 1, a plurality of protruding pieces that are smaller than the spring portion and can be elastically deformed are formed on the pressing surface of the spring portion to the inner wall surface. It is said.

  In the present invention, a plurality of protruding pieces are formed on the pressing surface of the spring portion against the inner wall surface, and the protruding pieces are smaller than the spring portion and can be elastically deformed. For this reason, the spring part can be fixed to the inner wall surface more satisfactorily, and even if the leg part moves in the removal direction, at least the tip part of the spring part can be more preferably fixed to the same position on the inner wall surface. it can. Therefore, at the time of extraction, the leg portion can be relatively moved in the extraction direction with respect to at least the tip portion of the spring portion. For this reason, the detachment force is further increased with respect to the insertion force.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect, the spring portion protrudes from the vicinity of the tip of the leg portion in an inclined direction in the extraction direction of the leg portion, and the protruding piece extends in the extraction direction. It is characterized by protruding at a substantially right angle.

  In the present invention, since the spring portion protrudes from the vicinity of the tip of the leg portion in an inclined direction in the removal direction of the leg portion, even when the outer periphery of the spring portion is only fixed to the inner wall surface, The detachment force increases as it tries to spread in the outer circumferential direction. Moreover, since the protrusion piece formed in the pressing surface to the said inner wall surface of a spring part protrudes substantially orthogonally with respect to the said extraction direction, the outer periphery of a spring part can be favorably fixed to the said inner wall surface. For this reason, the detachment force is further increased with respect to the insertion force.

According to a fourth aspect of the present invention, in addition to the configuration according to any one of the first to third aspects, when the leg portion and the spring portion are inserted into the hole portion, the distal end portion of the spring portion is an outer periphery of the leg portion. It is characterized by abutting on.

  In the present invention, when the leg portion and the spring portion are inserted into the hole portion, the distal end portion of the spring portion comes into contact with the outer periphery of the leg portion, so when the leg portion moves in the removal direction with respect to the distal end portion, The operation of pressing the spring portion in the outer peripheral direction by the protrusion can be performed more reliably. For this reason, the detachment force is further increased with respect to the insertion force.

As described above, the invention according to claim 1 has an effect that the separation force can be favorably increased with respect to the insertion force. In the first aspect of the present invention, since the spring portion is pressed in the outer peripheral direction by providing the protrusion on the leg portion, the effect of increasing the detachment force is hardly affected by changes with time and has excellent durability. ing. Furthermore, in the first aspect of the invention, the operation of pressing the spring portion in the outer peripheral direction by the protrusion can be performed more smoothly and reliably, and the detachment force can be further increased with respect to the insertion force.

  In the invention according to claim 2, in addition to the effect of the invention according to claim 1, the spring portion can be more reliably pressed in the outer circumferential direction, and thus the detachment force is further improved with respect to the insertion force. The effect that it can enlarge is produced.

  In the invention described in claim 3, the outer periphery of the spring portion can be more favorably fixed to the inner wall surface of the hole portion. In addition to the effect of the invention described in claim 2, the detachment force is further improved with respect to the insertion force. The effect that it can be enlarged is produced.

In the invention according to claim 4, the operation of pressing the spring portion in the outer peripheral direction by the protrusion can be performed more reliably, and in addition to the effect of the invention according to any one of claims 1 to 3 , the detachment force with respect to the insertion force The effect that it is possible to increase the size more satisfactorily occurs.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view illustrating a configuration of a xylem clamp 1 to which the present invention is applied. As shown in FIG. 1, the xylem clamp 1 includes a base 3 having a flat bottom surface and a cylindrical recess 3 a formed on the surface, and a cylindrical surface connected to both ends of the base 3. And a clamp portion 10 for fixing the bottom surface of the base 3 to a bottomed hole 99 (see FIG. 3) drilled in a wood portion or the like, and an elastic synthetic resin ( For example, PP, PA, PE, PS, etc.) are integrally formed.

  The base 3 is formed in a substantially rectangular shape in plan view, and the arms 5 and 7 are connected to two opposing sides along the axis of the cylindrical surface. The axis of the cylindrical surface formed by the arms 5 and 7 is also arranged in parallel with the axis of the cylindrical surface of the recess 3a. Further, a plurality of grooves 5 a having a sawtooth cross section are formed on the inner side of one arm 5, and protrusions 7 a that engage with the grooves 5 a are formed on the outer side of the other arm 7. For this reason, if a wire bundle (not shown) is placed in the recess 3a of the base 3, the arms 7 and 5 are bent so as to sequentially cover the wire bundle, and the protrusion 7a is engaged with the appropriate groove 5a, the base is obtained. The wire bundle can be fixed on the table 3.

  Next, FIG. 2A is an enlarged view showing the configuration of the clamp portion 10 which is a characteristic part of the present embodiment, and FIG. 2B is a bottom view showing the configuration of the spring portion 13. As shown in FIGS. 1 and 2A, the clamp portion 10 includes a leg portion 11 projecting vertically from the bottom surface of the base 3, and projecting in the outer peripheral direction from the tip of the leg portion 11. And a spring portion 13 inclined in the end direction. A pair of spring portions 13 are provided symmetrically with respect to the central axis of the leg portion 11.

  The spring portion 13 has a tip portion 13a thicker than the other portion 13b, and a connecting portion 13c between the other portion 13b and the tip portion 13a has an inclined surface 13d on the side facing the leg portion 11. . Furthermore, a rectangular notch 13e is formed on the distal end portion 13a on the distal end side and on the side facing the leg portion 11.

  On the other hand, a protrusion 15 having an inclined surface 15a facing the inclined surface 13d is formed on the outer peripheral surface of the leg portion 11. Further, on the outer peripheral surface of the spring portion 13, five protruding pieces 17 that are smaller than the spring portion 13 and have a substantially fan shape in plan view are formed so as to protrude in a direction perpendicular to the central axis of the leg portion 11.

  Next, operation | movement of the clamp part 10 comprised in this way is demonstrated using the schematic diagram of FIG. When the clamp part 10 is inserted into a bottomed hole 99 (corresponding to the hole part of the present invention) drilled in a wood part or the like, as shown in FIG. When pressed, the protruding piece 17 and the spring portion 13 are elastically deformed in the direction of the opening of the bottomed hole 99. At this time, the distal end portion 13 a of the spring portion 13 contacts the outer peripheral surface of the leg portion 11, and the inclined surface 13 d of the spring portion 13 contacts the inclined surface 15 a of the protrusion 15.

  The insertion force F1 required at this time is the minimum force required to deform the spring portion 13 and the protruding piece 17 into the state shown in FIG. It becomes the size which added the frictional resistance between. In this state, by pressing the projecting piece 17 against the inner wall surface of the bottomed hole 99, the wood clamp 1 is satisfactorily fixed to the bottomed hole 99. The notch 13e (see FIG. 2) has an effect of easily bending the tip of the tip portion 13a. As a result, the protruding piece 17 is easily tilted in the direction of the opening of the bottomed hole 99 so that the insertion force F1 is obtained. There is an effect of making it smaller.

  Next, when a force in the removal direction (detachment force F2) is applied to the leg portion 11 from this state, the tip end portion 13a of the spring portion 13 rides on the protrusion 15 as shown in FIG. 13 is pressed in the outer circumferential direction. Then, the protruding piece 17 is further sandwiched between the spring portion 13 and the inner wall surface of the bottomed hole 99, and the frictional resistance between the protruding piece 17 and the inner wall surface of the bottomed hole 99 becomes extremely large. The clamping portion 10 cannot be removed from the bottomed hole 99 unless a detachment force F2 greater than the insertion force F1 is applied.

  Thus, in the clamp 1 for xylem, by making the separation force F2 larger than the insertion force F1, good fixability can be obtained while securing workability of fixing work such as electric wires. Moreover, since the detaching force F2 is increased by pressing the inclined surface 13d of the spring portion 13 by the inclined surface 15a of the protrusion 15, it is difficult to be affected by the change with time and is excellent in durability.

  The wood clamp 1 of the above embodiment is basically for attachment to a bottomed hole 99 drilled in a wood part such as a wood board, but can also be applied to a through hole, and moreover a metal The plate can be mounted if there is a hole, although there is some allowance for the plate thickness. That is, when applied to a metal plate, attachment is possible by the protruding piece 17 being caught on the edge of the metal plate.

  In addition, the present invention is not limited to the above-described embodiment, and can be implemented in various forms without departing from the gist of the present invention. For example, the shapes of the spring portion, the protrusion, the protruding piece, and the like can be variously modified in addition to the above.

  FIG. 4 is a front view showing a clamp portion 20 as a modified example in which the shapes of the spring portion 13 and the protruding piece 17 are different. The change of the clamp part 20 with respect to the clamp part 10 is that a chamfered part 13f is formed on the tip part 13a so as to open outwardly in connection with the tip of the inclined surface 13d, and the spring part 13 on the tip side of the chamfered part 13f. And the point which cut off the protrusion piece 17 is. In the clamp part 20 configured in this way, the insertion force F1 can be further reduced and the separation force F2 can be further increased.

  That is, at the time of insertion, the distal end portion 13a hardly comes into contact with the leg portion 11 (see the schematic diagram of FIG. 5), so that the insertion force F1 can be further reduced. Further, the tip of the tip portion 13a can be bent inward to some extent by forming the chamfered portion 13f. For this reason, even if it inserts in the small bottomed hole 99, it can prevent that the protrusion piece 17 is crushed (refer the schematic diagram of FIG. 5), and can further increase the detachment force F2.

  Furthermore, as a form other than the above embodiments, when sufficient frictional resistance is obtained between the inner wall surface of the hole and the outer peripheral surface of the spring part, the protruding piece is omitted and the outer peripheral surface of the spring part is used. The inner wall surface may be directly pressed, and a jagged groove may be formed on the outer peripheral surface of the spring portion 13 instead of providing the protruding piece 17. However, when the protruding piece 17 is provided as described above, at least the distal end portion 13a of the spring portion 13 can be more favorably fixed at the same position of the bottomed hole 99, and the detachment force F2 can be further improved. be able to.

  Furthermore, a gap may be formed between the tip portion 13a and the leg portion 11 when inserted into the bottomed hole 99. However, in the above-described embodiment, the distal end portion 13a contacts the outer peripheral surface of the leg portion 11 during insertion, so that the operation of pressing the spring portion 13 in the outer peripheral direction by the protrusion 15 can be performed more reliably. It goes without saying that such a configuration is made by designing the size of each part according to the size of the bottomed hole 99, but if the spring part 13 is more easily deformed than the projecting piece 17, the structure is further improved. Design becomes easy. That is, in this case, the spring portion 13 is deformed first, the tip portion 13 a comes into contact with the outer peripheral surface of the leg portion 11, and then the protruding piece 17 is deformed according to the size of the bottomed hole 99. Therefore, when the spring portion 13 is more easily deformed than the projecting piece 17, the diameter of the bottomed hole 99 in which the wood portion clamp 1 can be used in a state where the distal end portion 13 a is in contact with the outer peripheral surface of the leg portion 11. The tolerance is widened.

It is a front view showing the structure of the clamp for wood parts to which this invention was applied. It is the enlarged view and bottom view showing the structure of the clamp part of the clamp for wood parts. It is a schematic diagram showing operation | movement of the clamp part. It is a front view showing the structure of the modification of a clamp part. It is a schematic diagram showing the shape at the time of insertion of the clamp part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Clamp for wood part 3 ... Base 5, 7 ... Arm 10, 20 ... Clamp part 11 ... Leg part 13 ... Spring part 13a ... Tip part 13b ... Other part 13c ... Connection part 13d, 15a ... Inclined surface 15 ... Protrusion 17 ... Projection piece

Claims (4)

Legs inserted into the holes,
A spring portion protruding from the leg portion in the outer peripheral direction and elastically deformed when the leg portion is inserted and pressed toward the inner wall surface of the hole portion;
A fixing device comprising:
The tip part of the spring part is formed thicker than the other part of the spring part, and the connecting part between the tip part of the spring part and the other part faces the leg part when the spring part is elastically deformed. Has an inclined surface on the side,
Formed on the outer periphery of the leg portion, and having an inclined surface that abuts the inclined surface when the leg portion moves in the removal direction with respect to at least the distal end portion of the spring portion and presses the spring portion in the outer peripheral direction. The protrusion,
A fixture characterized by comprising.   The fixture according to claim 1, wherein a plurality of protruding pieces that are smaller than the spring portion and can be elastically deformed are formed on a pressing surface of the spring portion against the inner wall surface. The spring part protrudes from the vicinity of the tip of the leg part in an inclined manner in the direction of extraction of the leg part,
The fixture according to claim 2, wherein the protruding piece protrudes substantially perpendicular to the removal direction. The fixture according to any one of claims 1 to 3, wherein when the leg portion and the spring portion are inserted into the hole portion, a tip end portion of the spring portion abuts on an outer periphery of the leg portion .

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