JP5614222B2 - Corrugated clamp - Google Patents

Description

  The present invention relates to a corrugated clamp, and more particularly, to hold corrugated tubes of different diameters that are externally mounted on a wire harness with the same corrugated clamp without backlash.

  The corrugated tube is fitted on the corrugated tube in order to attach the corrugated tube to the vehicle body for the purpose of protection from other in-vehicle parts, etc. The clamp is fixed to the bracket protruding from the car body.

  As this type of corrugated clamp, the present applicant has proposed a corrugated clamp shown in FIG. 7 in Japanese Patent No. 4329752 (Patent Document 1). The corrugated clamp 1 has one end of a semi-circular body portion 2 and a lid portion 3 connected to each other via a hinge portion 4 so as to be openable and closable, and a lock piece 5 protruding from the other end of the lid portion 3. The other end of the portion 2 is provided with a lock piece insertion hole 6 for inserting and locking the lock piece 5 and a bracket insertion hole 7 for inserting and locking the bracket 9 on the vehicle body side. On the inner surfaces of the semi-annular body portion 2 and the lid portion 3, ribs 2 a and 3 a that fit into valleys of a corrugated tube (not shown) that fits outside are provided so as to protrude from the lock piece 5. Are provided with lock claws 5a, 5b, 5c that are engaged with the lock claws 8 on the inner surface of the lock piece insertion hole 6 in a step shape in the lock piece insertion direction.

  As described above, the ribs 2a and 3a on the inner surface of the main body 2 and the lid 3 can be fitted to the valleys of the corrugated tube, thereby preventing the positional deviation in the axial direction of the corrugated tube and the other end of the lid 3 By providing the lock claws 5a, 5b and 5c in three stages on the lock piece 5 on the side, the corrugated tube of three kinds of diameters can be held by one corrugated clamp 1.

Japanese Patent No. 4329752

  However, in the corrugated clamp 1 having the above-described configuration, an appropriate lock claw must be selected from the three lock claws 5a, 5b, and 5c in accordance with the diameters of the three types of corrugated tubes to be held. It is necessary to work while paying attention to the diameter of the corrugated tube in order to prevent misbonding. Further, the corrugated clamp 1 is not suitable for holding a corrugated tube having a diameter other than the predetermined three kinds of diameters. Even if the corrugated clamp 1 is externally fitted, the outer surface of the corrugated tube and the inner surface of the corrugated clamp 1 are used. The clearance between the corrugated tube and the corrugated tube may be difficult to maintain stably. In addition, even when the corrugated clamp 1 is externally fitted to the corrugated tube having the predetermined three types of diameters, the outer surface of the corrugated tube so that the lock claws 5a, 5b, and 5c of the lock piece 5 get over the locked claws 8 and are locked. It is necessary to provide a certain amount of clearance between the inner surface of the corrugated clamp 1 and the inner surface of the corrugated clamp 1.

  As long as the diameter of the corrugated tube that externally fits the corrugated clamp is within a predetermined range, the present invention can stably hold the same corrugated clamp without rattling regardless of the diameter of the corrugated tube, and can facilitate the work of attaching the corrugated clamp. Is an issue.

In order to solve the above problems, the present invention is a corrugated clamp that is externally fitted to a corrugated tube mounted on a wire harness and attached to a vehicle body,
For the corrugated tube made of a resin molded product in which annular crests and troughs are alternately provided in the axial direction, a first divided body fitted on the half circumference side and a second fit fitted on the other half circumference side. One end of the divided body is connected through a hinge portion so as to be freely opened and closed, and the other end is provided with a lock portion and a vehicle body locking portion that are locked together.
The first divided body is provided with a fixed arc frame portion, while the second divided body is provided with a movable arc frame portion that is movable in a radial direction, and inner peripheral surfaces of the fixed arc frame portion and the movable arc frame portion Ribs that fit in the valleys of the corrugated tube with an interval in the axial direction are projected,
The second divided body is provided with a fixed frame portion having one end connected to the hinge portion and the other end provided with the lock portion, and at least a circumferential direction of the movable arc frame portion with respect to the fixed frame portion. One end is connected via a thin part, and the thin part at one end connected to the fixed frame part on the hinge part side is a thin hinge, while the other end connected to the fixed frame part on the lock part side is external. and orientation inclined piece, wherein the thin hinge the outward tilting piece and movably in the radial direction as the rotation fulcrum, it is made possible diameter is bent the thin portion in accordance with the outer diameter of the valleys of the previous SL corrugated tube A corrugated clamp featuring the above is provided.

  As described above, the corrugated clamp of the present invention includes a first divided body that is fitted on the half circumference side of the corrugated tube, and is connected to the first divided body through the hinge portion so as to be freely opened and closed. And a second divided body that fits externally. In addition, the first divided body is provided with a fixed arc frame portion in which ribs that fit into the valley portions of the corrugated tube are projected from the inner peripheral surface, while the second divided body has a circumferential direction. A movable arc frame portion is provided in which an end portion is connected to the second divided body through a thin wall portion, and a rib that fits into a valley portion of the corrugated tube protrudes from the inner peripheral surface.

  That is, according to the above configuration, the corrugated tube is moved in the axial direction by fitting the rib of the fixed arc frame portion of the first divided body and the rib of the movable arc frame portion of the second divided body to the valley portion of the corrugated tube. It can be held without being displaced. Further, in the second divided body, the movable arc frame portion can be moved and expanded in the radial direction by bending the thin portion according to the outer diameter of the valley portion of the corrugated tube to be held. If the diameter is within the predetermined range, the corrugated tube can be stably held by the same corrugated clamp regardless of the diameter of the corrugated tube. Further, by utilizing the bending of the thin wall portion, it is possible to secure a clearance for locking the first and second divided bodies externally fitted to the corrugated tube, and the clearance can be easily absorbed after the locking connection. Therefore, it is possible to prevent rattling of the corrugated tube held by the corrugated clamp. Furthermore, since it is not necessary to perform lock coupling stepwise as in the prior art, the structure of the lock portion can be simplified, and the operator only needs to perform normal lock coupling, so that the corrugated clamp can be easily and reliably attached. be able to.

As described above, the second divided body is provided with a fixed frame portion having one end connected to the hinge portion and the other end provided with the lock portion, and the periphery of the movable arc frame portion with respect to the fixed frame portion. At least one end in the direction is connected via the thin wall portion, and the thin wall portion at one end connected to the fixed frame portion on the hinge portion side is a thin hinge, while the other end connected to the fixed frame portion on the lock portion side is the outward inclined piece, that has a configuration that the outwardly inclined piece of the thin hinge as a rotation fulcrum is moved in the radial direction.

  According to the above configuration, when the second divided body is externally fitted to the corrugated tube having a large diameter from the hinge portion side, the thin-walled hinge serves as a rotation fulcrum so that the movable arc frame portion rotates in the diameter increasing direction. The outward inclined piece can be moved in the radial direction. That is, it is possible to smoothly move and expand the diameter of the movable arcuate frame in accordance with the shape and size of the corrugated tube to be held.

Connecting both ends in the circumferential direction of the movable arc frame portion to the fixed frame portion via the thin portion,
It is more preferable that the outwardly inclined piece is also the thin portion and the thin hinge has an arc shape.

  It is preferable that the thickness of the thin portion is 40% to 60% of the thickness of the movable arc frame portion and the fixed frame portion, and the moving dimension in the radial direction of the movable arc frame portion is 3 mm to 5 mm.

  When the thickness of the thin portion is less than 40% of the thickness of the movable arc frame portion and the fixed frame portion, the durability as a corrugated clamp may be lowered, while the thickness of the thin portion is fixed frame. If it exceeds 60% of the wall thickness of the portion, there is a possibility that it is difficult to move and expand the diameter of the movable arc frame portion in the radial direction. In addition, if the moving dimension of the movable arc frame portion in the radial direction, in other words, the dimension capable of expanding the diameter is less than 3 mm, it is difficult to obtain the effect of the present invention that the corrugated tube can be held regardless of the diameter of the corrugated tube. When the moving dimension of the movable arc frame part in the radial direction exceeds 5 mm, the length of the thin part becomes large, and the size balance with the first divided body may be lost, or the corrugated clamp may be enlarged.

As described above, the corrugated clamp of the present invention includes a first divided body that is fitted on the half circumference side of the corrugated tube, and is connected to the first divided body via the hinge portion so as to be freely opened and closed. A second arcuately fitting second divided body, and the first divided body is provided with a fixed arc frame portion having a rib that fits into a valley portion of the corrugated tube projecting from an inner peripheral surface, The divided body is provided with a movable arc frame portion in which a circumferential end portion is connected to the second divided body through a thin wall portion and a rib that fits into a trough portion of the corrugated tube is projected from the inner peripheral surface. Yes.
Therefore, the corrugated tube can be held without being displaced in the axial direction by fitting the rib of the fixed arc frame portion of the first divided body and the rib of the movable arc frame portion of the second divided body to the valley portion of the corrugated tube. In addition, since the movable arc frame can be moved and expanded in the radial direction by bending the thin wall portion according to the outer diameter of the valley portion of the corrugated tube held in the second divided body, the diameter of the corrugated tube Is within the predetermined range, the corrugated tube can be stably held by the same corrugated clamp regardless of the diameter of the corrugated tube.

  Further, by utilizing the bending of the thin wall portion, it is possible to secure a clearance for locking and coupling the first and second divided bodies externally fitted to the corrugated tube, and the clearance can be absorbed after the locking coupling. The rattling of the corrugated tube held by the corrugated clamp can be prevented. Furthermore, since it is not necessary to perform lock coupling step by step as in the prior art, the structure of the lock portion can be simplified, and the operator only needs to perform normal lock coupling, so the corrugated clamp can be easily and reliably attached. be able to.

The corrugated clamp of this embodiment is shown, (A) is a perspective view of the state which open | released the 1st division body and the 2nd division body, (B) is a front view. The corrugated clamp of this embodiment is shown, (A) is a perspective view of the state which closed the 1st division body and the 2nd division body, (B) is a front view. (A) is a top view of FIG. 2, (B) is an AA sectional view. The state which fitted the corrugated clamp to the corrugated tube is shown, (A) is a perspective view, (B) is a BB sectional drawing. (A) is a CC line sectional view showing a state in which a corrugated clamp is externally fitted to a corrugated tube having a minimum diameter (valley outer diameter D = 22.7 mm), and (B) is a maximum diameter (valley). It is CC sectional view taken on the line which shows the state which fitted the corrugated clamp to the corrugated tube of the outer diameter D = 25.8mm of a part. It is explanatory drawing which shows a motion of the movable circular arc frame part at the time of fitting a corrugated clamp to the corrugated tube with the largest diameter. A prior art example is shown, (A) is a perspective view, (B) is a front view.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show a corrugated clamp of this embodiment.
As shown in FIG. 4, the corrugated clamp 10 of the present embodiment has a predetermined range of diameters (in this embodiment, the outer diameter D of the valley portion 32 is 22.7 mm to 25.8 mm) that is externally mounted on the wire harness W / H. It is fitted to the bracket 40 of the vehicle body by being fitted around the corrugated tube 30 having it.
As shown in FIGS. 1 to 4, the corrugated clamp 10 made of a resin molded product is a corrugated tube 30 made of a resin molded product in which annular crests 31 and troughs 32 are alternately provided in the axial direction. A first divided body 11 fitted on the lower half circumference side and a second divided body 18 fitted on the upper half circumference side are provided, and one end of the first divided body 11 and the second divided body 18 is opened and closed via a hinge portion Connected freely. A lock piece 27 provided with one lock claw 28 projects from the other end of the second divided body 18, while a locked hole into which the lock piece 27 is inserted into the other end of the first divided body 11. 14 is provided. A locked claw 15 for locking the lock claw 28 of the lock piece 27 is provided in the inside of the locked hole 14. Thus, a lock portion 29 for locking and coupling the closed first and second divided bodies 11 and 18 is formed. In the present embodiment, a pair of the locked hole 14 of the first divided body 11 and the lock piece 27 of the second divided body 18 are provided in the axial direction of the corrugated clamp 10.
A vehicle body locking portion 16 for inserting and locking the bracket 40 protruding from the vehicle body is provided adjacent to the locked hole 14 of the first divided body 11.

  The first divided body 11 is provided with a fixed arc frame 12 having an arc cross section that holds the lower half of the corrugated tube 30 between the hinge portion 17 and the locked hole 14. On the inner peripheral surface of the fixed arc frame 12, ribs 13 are provided in the circumferential direction so as to be fitted in the valleys 32 of the corrugated tube 30 with an interval in the axial direction. In the present embodiment, three ribs 13 are arranged in parallel at the front end edge and rear end edge in the axial direction of the inner peripheral surface of the fixed arc frame 12 and the intermediate position thereof, and the corrugated tube 30 into which the rib 13 at the front end edge is fitted. If the trough portion 32 is the first trough portion 32, the rib 13 at the intermediate position is fitted to the third trough portion 32, and the rib 13 at the rear end edge is fitted to the fifth trough portion 32. The axial length of the fixed arc frame 12 is determined [FIG. 4B].

  On the other hand, the second divided body 18 has a box-shaped fixed frame portion 22 having one end connected to the hinge portion 17 and a lock piece 27 at the other end, and is disposed inside the fixed frame portion 22. A movable arc frame portion 19 having an arc cross section that holds the upper half circumference side of the corrugated tube 30 is provided, and both ends in the circumferential direction of the movable arc frame portion 19 are connected to the fixed frame portion 22 through thin portions 21 (21a, 21b). Thus, the movable arc frame 19 can be moved in the radial direction.

  The front end surface and the rear end surface in the axial direction of the fixed frame portion 22 are the front end surface and the rear end surface of the fixed arc frame portion 12 of the first divided body 11 when the first divided body 11 and the second divided body 18 are closed. A semicircular opening 23 through which the corrugated tube 30 is inserted is provided on the front end surface and the rear end surface in the axial direction of the fixed frame portion 22, and at the edge of the opening 23. Is a rib that fits into the first and fifth trough portions 32 of the corrugated tube 30 when the corrugated tube 30 has the largest diameter (in this embodiment, the outer diameter D of the trough portion 32 is 25.8 mm). 24 is protrudingly provided.

In the present embodiment, a central wall portion 25 that protrudes inward from the axial center position of both side walls of the fixed frame portion 22 is provided, and a space sandwiched between the front end surface of the fixed frame portion 22 and the central wall portion 25. In addition, a pair of movable arc frame portions 19 are juxtaposed in a space sandwiched between the central wall portion 25 and the rear end surface of the fixed frame portion 22. On the inner peripheral surface of the movable arc frame portion 19, ribs 20 that fit into the valley portions 32 of the corrugated tube 30 are provided in the circumferential direction. In this embodiment, the axial direction of the movable arc frame portion 19 on the front side is provided. The rib 20 projecting at the center position is fitted into the second valley 32 of the corrugated tube 30 shown in FIG. 4B, and the rib 20 projecting at the center position in the axial direction of the movable arc frame 19 on the rear side. Is fitted to the fourth trough 32 of the corrugated tube 30. Since the movable arc frame portion 19 is movable in the radial direction as described above, the rib 20 protruding from the movable arc frame portion 19 has an outer diameter D of the valley portion 32 of 22.7 mm to 25.8 mm. The corrugated tube 30 can be fitted into the valley 32 of any corrugated tube 30.
On the other hand, rectangular openings 26 are arranged on the upper surface of the fixed frame portion 22 (the surface located on the upper surface side when the second divided body is closed) so as not to disturb the radial movement of each movable arc frame portion 19. Has been established.

In this embodiment, as shown in FIG. 3 (B), the thin-walled portion 21a that connects one end in the circumferential direction of the movable arc frame portion 19 and the inner side surface of the fixed frame portion 22 on the hinge portion 17 side is formed into an arc shape. While the thin hinge 21a is used, the thin wall 21b that connects the other end in the circumferential direction of the movable arc frame 19 and the edge of the rectangular opening 26 on the lock piece 27 side is an outwardly inclined piece 21b.
The thickness of the thin portion 21 (21a, 21b) is 40 to 60% of the thickness of the movable arc frame portion 19 and the fixed frame portion 22, and in this embodiment, the thickness of the movable arc frame portion 19 and the fixed frame portion 22 is set. 50% of the thickness.

Hereinafter, the external fitting of the corrugated clamp 10 to the corrugated tube 30 and the movement of the movable arc frame portion 19 when the corrugated clamp 10 is externally fitted to the corrugated tube 30 having a large diameter will be described.
First, the corrugated tube 30 is set on the fixed arc frame portion 12 of the first divided body 11 of the corrugated clamp 10 in the open state shown in FIG. 1, and the ribs 13 of the fixed arc frame portion 12 are respectively set on the valley portions 32 of the corrugated tube 30. Fit.
Subsequently, the second divided body 18 is closed and the lock piece 27 is inserted into the locked hole 14 so as to cover the upper half side of the set corrugated tube 30, and lock coupling is performed.

  When the corrugated clamp 10 is externally fitted to the corrugated tube 30 having the smallest diameter (in this embodiment, the outer diameter D of the valley portion 32 is 22.7 mm), as shown in FIG. 5A, the thin portion 21 (21a, 21b) does not move and the movable arc frame portion 19 does not move, and the ribs 20 of the movable arc frame portion 19 of the second divided body 18 are fitted to the valley portions 32 of the corrugated tube 30 at the original position, respectively. 30 is held by the corrugated clamp 10.

  On the other hand, when the corrugated clamp 10 is externally fitted to the corrugated tube 30 having a large diameter, the thin-walled portion 21 (21a, 21b) is selected according to the outer diameter D of the valley portion 32 into which the rib 20 of the movable arc frame portion 19 is fitted. ) Is bent to move and expand the diameter of the movable arc frame 19. That is, when the second divided body 18 of the corrugated clamp 10 is externally fitted to the corrugated tube 30 having a large diameter from the hinge portion 17 side, as shown in FIGS. 5 (B) and 6, an arcuate thin hinge 21a. Becomes the rotation fulcrum, and the outward inclined piece 21b moves in the radial direction so as to rotate the movable arc frame portion 19 in the radial expansion direction. Therefore, even when the diameter of the corrugated tube 30 to be held increases within a predetermined range, the movable arc frame portion 19 smoothly moves and expands in accordance with the shape and dimensions of the corrugated tube 30, and the movable arc in the expanded state. Since the rib 20 of the frame portion 19 can be fitted into the valley portion 32 of the corrugated tube 30, the corrugated tube 30 having a large diameter can be held by the same corrugated clamp 10.

  5B shows a state in which the corrugated clamp 10 is externally fitted to the corrugated tube 30 having the maximum diameter (in this embodiment, the outer diameter D of the valley portion 32 is 25.8 mm). FIG. 6 shows the movement of the movable arc frame portion 19 when the corrugated clamp 10 is fitted on the corrugated tube 30 having the maximum diameter, and the original positions of the movable arc frame portion 19 and the thin portion 21 are indicated by broken lines. The final positions of the movable arc frame part 19 and the thin part 21 are indicated by solid lines. In the present embodiment, the moving dimension of the movable arc frame portion 19 in the radial direction, that is, the dimension capable of expanding the diameter is set to 3.1 mm.

  As described above, the corrugated clamp 10 of the present embodiment is connected to the first divided body 11 fitted on the lower half circumference side of the corrugated tube 30 and the first divided body 11 and the hinge portion 17 so as to be freely opened and closed. And a second divided body 18 that is externally fitted to the upper half circumference side of the corrugated tube 30, and the first divided body 11 is fixed with ribs 13 that fit into the valleys 32 of the corrugated tube 30 projecting from the inner circumferential surface. While the arc frame portion 12 is provided, the second divided body 18 is connected to the fixed frame portion 22 of the second divided body 18 through the thin-walled portion 21 (21a, 21b) and the corrugated tube. A movable arc frame portion 19 is provided in which ribs 20 that fit into the valley portions 32 of the 30 protrude from the inner peripheral surface. Accordingly, the rib 13 of the fixed arc frame portion 12 of the first divided body 11 and the rib 20 of the movable arc frame portion 19 of the second divided body 18 are fitted to the valley portion 32 of the corrugated tube 30 so that the corrugated tube 30 is axial. The movable arc frame portion 19 can be held without being displaced in the direction, and the thin portion 21 (21a, 21b) is bent according to the outer diameter D of the valley portion 32 of the corrugated tube 30 to be held in the second divided body 18. The corrugated tube 30 can be stably held by the same corrugated clamp 10 regardless of the diameter of the corrugated tube 30 as long as the diameter of the corrugated tube 30 is within a predetermined range. it can.

  Further, by utilizing the bending of the thin wall portion 21 (21a, 21b), it is possible to secure a clearance for locking and coupling the first and second divided bodies 11 and 18 fitted to the corrugated tube 30, and lock coupling. Thereafter, the clearance can be absorbed, so that the corrugated tube 30 held by the corrugated clamp 10 can be prevented from rattling. Furthermore, since it is not necessary to perform lock coupling step by step, the structure of the lock portion 29 can be simplified, and the operator only needs to perform normal lock coupling, so that the corrugated clamp 10 can be easily and reliably attached. it can.

DESCRIPTION OF SYMBOLS 10 Corrugated clamp 11 1st division body 12 Fixed arc frame parts 13, 20, 24 Rib 16 Car body locking part 17 Hinge part 18 Second division body 19 Movable arc frame part 21 Thin part 21a Arc-shaped thin hinge 21b Inclining outward Piece 22 Fixed frame portion 29 Lock portion 30 Corrugated tube 31 Mountain portion 32 Valley portion

Claims (3)

A corrugated clamp that is externally fitted to a corrugated tube that is mounted on a wire harness and is attached to a vehicle body,
For the corrugated tube made of a resin molded product in which annular crests and troughs are alternately provided in the axial direction, a first divided body fitted on the half circumference side and a second fit fitted on the other half circumference side. One end of the divided body is connected through a hinge portion so as to be freely opened and closed, and the other end is provided with a lock portion and a vehicle body locking portion that are locked together.
The first divided body is provided with a fixed arc frame portion, while the second divided body is provided with a movable arc frame portion that is movable in a radial direction, and inner peripheral surfaces of the fixed arc frame portion and the movable arc frame portion Ribs that fit in the valleys of the corrugated tube with an interval in the axial direction are projected,
The second divided body is provided with a fixed frame portion having one end connected to the hinge portion and the other end provided with the lock portion, and at least a circumferential direction of the movable arc frame portion with respect to the fixed frame portion. One end is connected via a thin part, and the thin part at one end connected to the fixed frame part on the hinge part side is a thin hinge, while the other end connected to the fixed frame part on the lock part side is external. and orientation inclined piece, wherein the thin hinge the outward tilting piece and movably in the radial direction as the rotation fulcrum, it is made possible diameter is bent the thin portion in accordance with the outer diameter of the valleys of the previous SL corrugated tube Corrugated clamp characterized by. In the second divided body, both ends in the circumferential direction of the movable arc frame portion are connected to the fixed frame portion via the thin portion, the outwardly inclined piece is also the thin portion, and the thin hinge is The corrugated clamp according to claim 1 , wherein the corrugated clamp has an arc shape . The thickness of the thin portion is 40% to 60% of the wall thickness of the movable arc frame portion and the fixed frame part, the movement radial dimension of the movable arc frame section according to claim 1 or is set to 3mm~5mm corrugated clamp mounting serial to claim 2.

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