JP4223785B2 - Corrugated tube rotation holder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a corrugated tube rotating holder that rotatably holds a corrugated tube that houses a wire harness, for example.
[0002]
[Prior art]
As this type of conventional corrugated tube rotating holder, there are those shown in FIGS. As shown in FIGS. 9 to 10, the corrugated tube rotating holder 1 includes an outer fixed body 2 and an inner rotary body 3 rotatably accommodated in the outer fixed body 2. The corrugated tube 4 in which the wire harness W is accommodated is held inside the body 3.
[0003]
As shown in FIGS. 9 to 11, the outer fixed body 2 includes a base member 5 and a cover 6 locked to the base member 5, and can be assembled by abutting the abutting surfaces 5 b and 6 b. ing. An inner rotating chamber 8 surrounded by an inner sliding surface 7 is formed inside the assembled base member 5 and cover 6, and the inner sliding surface 7 is formed on each inner periphery of the base member 5 and the cover 6. It is formed by arcuate surfaces 5a and 6a.
[0004]
Further, as shown in FIGS. 9 and 12, the inner rotating body 3 is composed of two semi-cylindrical rotating division members 9 and 9 each having an arcuate surface 9a on the outer periphery. The surface 9b is abutted and assembled. A circumferential outer peripheral sliding surface 10 is formed by the arcuate surfaces 9 a of the two rotary divided members 9 and 9 assembled, and the inner rotary body 3 has the outer peripheral sliding surface 10 of the outer fixed body 2. The inner fixed surface 2 is rotated by sliding on the inner sliding surface 7. Thus, the corrugated tube 4 is rotatably held by the corrugated tube rotating holder 1 by rotating the inner rotating body 3.
[0005]
[Patent Document 1]
JP-A-5-168122 [0006]
[Problems to be solved by the invention]
However, the outer fixed body 2 of the conventional corrugated tube rotating holder 1 is configured by assembling the base member 5 and the cover 6 in order to accommodate the inner rotating body 3 therein. Accordingly, due to the backlash of the locking means 11 between the base member 5 and the cover 6 or the external force acting on the base member 5 or the cover 6, the butting surfaces 5b and 6b between the base member 5 and the cover 6 are changed as shown in FIG. There is a risk of misalignment. When the misalignment occurs in the abutting surfaces 5b and 6b in this way, the connecting points between the base member 5 and the arcuate surfaces 5a and 6a of the cover 6 do not coincide with each other, and the diameter of the inner sliding surface 7 is equal to the misalignment amount d2. Since it decreases substantially, there exists a problem that the smooth rotation of the inner rotary body 3 is inhibited.
[0007]
Further, when the corrugated tube 4 in which the wire harness W is accommodated is greatly shaken with the inner rotating body 3 of the corrugated tube rotating holder 1 as a fulcrum, the opening of the outer fixed body 2 from which the corrugated tube 4 is led out The wire harness W including the corrugated tube 4 is easily refracted, and in some cases, the corrugated tube 4 and a plurality of electric wires constituting the internal wire harness W are easily damaged.
[0008]
Therefore, the present invention has been made to solve the above-described problems, and even if a positional deviation occurs between the abutting surfaces between the plurality of fixed divided members, the inner rotating body can be smoothly rotated. An object of the present invention is to provide a corrugated tube rotating holder capable of reliably preventing damage to the corrugated tube and the internal electric wire.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, an inner rotating chamber surrounded by a circumferential inner sliding surface is provided in the outer fixed body, and an inner rotating body that stores and holds the corrugated tube is accommodated in the inner rotating chamber. In the corrugated tube rotating holder in which the outer peripheral sliding surface of the inner rotating body rotates the corrugated tube by sliding the inner sliding surface of the outer fixed body, the outer fixed body has an inner peripheral surface. A plurality of fixed division members having arcuate surfaces on the inner sliding surface, the abutment surfaces of the plurality of fixed division members being abutted against each other and assembled by the arc surfaces of the assembled plurality of fixed division members. Is formed, and one fixed divided member with which the mutual abutting surfaces are abutted with each other is provided with an imaginary circle of the arc surface at the end of the arc surface. Outer exit surface having a predetermined length in the straight is extended in the direction along the trajectory, the other fixed splitting member is sized to between the tip surface of both of the arcuate surface is coincident with the distal end surface of the outer exit surface It is characterized by being set.
[0010]
In this corrugated tube rotating holder, even if the misalignment occurs on the abutting surface between the plurality of fixed divided members due to the backlash of the locking means between the plurality of fixed divided members or the external force acting on the outer fixed body, the other Since the end of the arcuate surface of the fixed dividing member is formed with a size larger than the diameter of the arcuate surface of one fixed dividing member, the step formed on the abutting surface of the fixed dividing member is a circumferential locus of the inner sliding surface Do not go inside from above. Thereby, even if position shift arises in each abutting surface between a plurality of fixed division members, an inner rotating body rotates smoothly.
[0011]
A second aspect of the present invention is the corrugated tube rotary holder according to the first aspect, wherein the plurality of fixed dividing members are a base member and a cover.
[0012]
In this corrugated tube rotating holder, in addition to the operation of the first aspect of the invention, the outer fixed body can be easily assembled by assembling the cover to the base member.
[0013]
A third aspect of the present invention, a second aspect rotary holder for corrugated tube, wherein the base member outer exit surface are formed on, the abutting faces of the front SL base member and the cover the inner sliding surface It is arrange | positioned in the position above the center of.
[0014]
In this corrugated tube rotating holder, in addition to the effect of the invention of claim 2, the inner rotating body rotates smoothly without increasing the width of the outer fixed body.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0018]
1 to 8 show an embodiment of the present invention, FIG. 1 is an exploded perspective view of a corrugated tube rotating holder, FIG. 2 is a cross-sectional view of the main part of the rotating holder, and FIG. 3 is the rotating holder. FIG. 4 is an exploded front view of an inner rotating body used in the rotary holder, FIG. 5 is an exploded side view of the inner rotating body, and FIG. 6 is a configuration of the inner rotating body. FIG. 7 is a schematic cross-sectional view of the outer fixed body, and FIG. 8 is an enlarged schematic cross-sectional view showing a state in which each butting surface between the base member and the cover constituting the outer fixed body is displaced. It is.
[0019]
As shown in FIGS. 1 to 6, the corrugated tube rotary holder 20 includes an outer fixed body 21 and an inner rotary body 22 rotatably accommodated in the outer fixed body 21. A corrugated tube 23 made of rubber or the like in which the wire harness W is accommodated is held inside 22.
[0020]
The outer fixed body 21 includes a synthetic resin base member 24 as a fixed divided member and a synthetic resin cover 25 as a fixed divided member, and the outer fixed body 21 is assembled by assembling the base member 24 and the cover 25. Is configured. The base member 24 has a lower housing case portion 28 that forms the lower half of an inner rotating chamber 27 described later. The upper end surface of the lower housing case portion 28 is a butted surface 28a, and the lower side A circular arc surface 28 b is formed on the inner surface of the housing case portion 28. Further, the cover 25 has an upper storage case portion 30 that forms an upper half of an inner rotary chamber 27 to be described later. The inner lower end surface of the upper storage case portion 30 is a butting surface 30a, and the upper storage case portion An arc surface 30 b is formed on the inner surface of 30.
[0021]
The base member 24 and the cover 25 are assembled in a state in which the abutting surfaces 28a and 30a are abutted against each other. The base member 24 and the cover 25 are circumferentially arranged inside the lower accommodating case portion 28 and the upper accommodating case portion 30. An inner rotating chamber 27 surrounded by an inner sliding surface 26 is formed. The cover 25 is formed with two guides 32 and 32 that protrude in the direction in which the corrugated tube 23 extends.
[0022]
Further, the upper end portion of the arc surface 28b of the base member 24 is outside the virtual circumferential locus c of the arc surface 28b (circular locus assuming a circumferential surface having the same diameter as the arc surface 28b shown in FIG. 8). An outer withdrawal surface 32 located at is extended. In this embodiment, as shown in FIGS. 2 and 7, the outer withdrawal surface 32 extends straight upward from the center of the inner sliding surface 26 by E dimension, and is the uppermost end surface (tip surface). Is the position farthest from the virtual circumferential trajectory c. Further, the lowermost end surfaces (tip surfaces) 30a of both the arcuate surfaces 30b of the cover 25 are set to dimensions that coincide with the tip surfaces 28a of the outer withdrawal surfaces 32. That is, the dimension between the tip surfaces on both sides of the outer withdrawal surface 32 is set slightly larger than the diameter of the arc surface 28b, and accordingly, the dimension between both tip surfaces of the arc surface 30b of the cover 25 is also the arc surface 28b of the base body 24. It is set slightly larger than the diameter. Further, as shown in FIGS. 2 and 3, the abutting surfaces 28 a and 30 a between the base member 24 and the cover 25 at the location of the inner sliding surface 26 are positioned above the center of the inner sliding surface 26 by E dimension. positioned.
[0023]
Further, as shown in FIGS. 1 and 3, frame-like locked portions 29 as locking means are provided at appropriate positions on both side surfaces of the lower housing case portion 28, and at appropriate positions on both side surfaces of the upper case housing portion 30. A hook-shaped lock arm portion 31 is provided as a locking means, and the base member 24 and the cover 25 are assembled and fixed by locking the lock arm portion 31 to the locked portion 29. It has become.
[0024]
As shown in FIGS. 1 and 4 to 6, the inner rotating body 22 includes a pair of rotating division members 33 and 33 each having an arcuate surface 33 a on the outer periphery, and the pair of rotation dividing members 33 and 33 are abutted with each other. The surface 33b is abutted and assembled. And the substantially circular outer periphery sliding surface 35 is formed by each circular arc surface 33a of this assembled | attached pair of rotation division member 33, 33, This outer periphery sliding surface 35 is provided in three places. . Further, as shown in FIG. 4, the end portion of the arc surface 33a of each rotating member 33 is a cut surface 36 that retreats inward from the rotation locus b of the arc surface 33a. The cut surface 36 is a butt surface. It is formed as a flat surface cut in the orthogonal direction of 33b. Therefore, the outer peripheral sliding surface 35 is formed in a circular shape except for the boundary portion of each rotary dividing member 33, and the boundary portion of each rotary dividing member 33 is formed in a flat shape.
[0025]
Each rotary dividing member 33 is formed with a U-shaped groove 37a that opens to the abutment surface 33b. When the rotary divided member 33 is assembled, the U-shaped groove 37a of each rotary divided member 33 allows the harness receiving port to be opened. 37 is formed. And the corrugated tube 23 in which the wire harness W is accommodated in the tube accommodating chamber 37b inside the harness accommodating port 37 is held in a clamped state.
[0026]
Further, as shown in FIG. 6, a pair of positioning projections 39, 39 are alternately formed integrally on the left and right butting surfaces 33 b of each rotary dividing member 33, and each positioning projection 39 is inserted into each positioning projection 39. The grooves 40 are formed alternately. Further, a frame-like lock arm portion 41 as a locking means protrudes from one side of the left and right outer walls of each rotary dividing member 33, and the other side serves as a locking means for locking the lock arm portion 41. A hook-like locked portion 42 is provided.
[0027]
And when assembling a pair of rotation division members 33 and 33, by inserting mutual positioning projection 39 into positioning groove 40, mutual butting surfaces 33b can be easily but appropriately abutted and assembled. It has become. In addition, the assembled state is fixed by locking the lock arm portions 41 of the respective rotation division members 33 to the locked portions 42 in a state where the respective abutting surfaces 33b of the pair of rotation division members 33 and 33 are abutted. It is like that.
[0028]
As shown in FIG. 1, the arc-shaped flanges 33 c on one end side of the respective rotary dividing members 33 of the inner rotating body 22 are arc-shaped and projecting from one end side of the inner rotating chamber 27. , 27c. Further, the inner rotating body 22 is rotated within a range of 180 degrees by the projection 33d projecting from the center of each rotary dividing member 33 hitting the projecting portion 26d projecting from the upper and lower portions of the inner sliding surface 26. Further, each concave portion 23a of the corrugated tube 23 having an elliptical cross section (flat shape) is engaged with a plurality of protrusions 37c protruding into the tube storage chamber 37b of each rotary dividing member 33, and is outside the protrusion 37c on one end side. To be exposed.
[0029]
In the above configuration, when a rotational force is applied to the corrugated tube 23 from the wire harness W or the like, the inner rotating body 22 that has received the rotating force slides on the inner sliding surface 26 of the outer fixed body 21 at its outer peripheral sliding surface 35. By doing so, the outer fixed body 21 is rotated. Thus, the corrugated tube 23 is rotatably held by rotating the inner rotating body 22.
[0030]
By the way, as shown in FIG. 8, the base member 24 and the cover 25 are covered by the backlash of the lock arm portion 31 and the locked portion 29 between the base member 24 and the cover 25, or by external force acting on the base member 24 and the cover 25. Even if the misalignment occurs in the butting surfaces 28a and 30a between the 25, the arc surface 30b of the cover 25 is formed to have a size slightly larger than the diameter of the arc surface 28b of the base body 24. The step formed in the portion 28a does not enter the inside of the virtual circumferential locus c of the inner sliding surface 26. Therefore, the inner rotating body 22 can always be rotated more smoothly even when the abutting surfaces 28a and 30a between the base member 24 and the cover 25 are displaced. In the embodiment, the outer fixed body 21 is Since the fixed dividing members to be formed are the two members of the base member 24 and the cover 25, the outer fixed body 21 can be easily assembled by a simple assembling operation of assembling the cover 25 to the base member 24.
[0031]
Further, in the above-described embodiment, the outer withdrawal surface 32 is integrally formed on the base member 24, and the outer withdrawal surface 32 extends straight upward from the center of the inner sliding surface 26, and the base member 24 and the cover 25. The abutting surfaces 28a and 30a are arranged at positions above the center of the inner sliding surface 26, so that the inner rotating body 22 is always rotated more smoothly without increasing the lateral width of the outer fixed body 21. be able to.
[0032]
In the embodiment, the cover 25 is integrally formed with the two guides 43, 43 protruding in the direction in which the corrugated tube 23 extends so as to extend from the upper housing case 30. Therefore, the curvature of the corrugated tube 23 is held within a certain value by contacting the guides 43.
[0033]
That is, as shown in FIG. 1, a pair of left and right guides 43, 43 that hold the curvature of the corrugated tube 23 within a predetermined value are formed on the lead-out side of the corrugated tube 23 of the cover 25. A substantially arc-shaped curved wall 43a is formed integrally with the corrugated tube 43 along the inside thereof. Each inner curved wall 43a is substantially V-shaped in cross section with each outer wall, and is fitted into a pair of left and right guide support portions 24a, 24a erected on the lead-out side of the corrugated tube 23 of the base member 24. Therefore, the base member 24 extends to the lower side. Further, a substantially arc-shaped curved wall 43b along which the corrugated tube 23 runs along is integrally formed between the upper ends of the pair of left and right curved walls 43a, 43a. Accordingly, even if the corrugated tube 23 is greatly swung in the left-right direction and upward on the outlet side of the corrugated tube 23, the corrugated tube 23 can be prevented from being bent by the curved walls 43a and 43b. A plurality of electric wires constituting the wire harness W can be reliably prevented from being damaged or damaged due to repeated over time.
[0034]
Further, in the above-described embodiment, due to the action of external force from the corrugated tube 23 and the backlash of the lock arm portion 41 and the locked portion 42 between the pair of rotary split members 33 and 33, butting between the rotary split members 33 A position shift may occur on the surface 33b. However, since the cut surface 36 is formed at the end of the arcuate surface 33a of each rotary dividing member 33, the stepped portion formed at the abutting surface 33b of each rotary dividing member 33 is the rotation locus b of the outer peripheral sliding surface 35. A substantial increase in the diameter of the outer peripheral sliding surface 35 formed by the circular arc surface 33a of each rotary dividing member 33 is suppressed to a minute without projecting from above. Therefore, the inner rotating body 22 can always be rotated more smoothly even if a positional shift occurs on the abutting surface 33b between the rotary dividing members 33.
[0035]
In the above-described embodiment, the abutting surfaces 28a and 30a of the base member 24 and the cover 25 are arranged at positions above the center of the inner sliding surface 26, but at positions below the center of the inner sliding surface 26. It may be arranged. Moreover, although the outer fixed body 21 was comprised with two members, you may comprise with three or more fixed division members. The corrugated tube 23 is not limited to a flat shape having an elliptical cross section, and may be a cylindrical shape having a circular cross section. Furthermore, it is needless to say that the embodiment can be applied not only to a corrugated tube having an uneven shape but also to a tube having no unevenness.
[0036]
【The invention's effect】
As described above, according to the first aspect of the present invention, the locking means between the plurality of fixed divided members constituting the outer fixed body, the external force acting on the outer fixed body, etc. Even if the misalignment occurs in each butting surface, the end of the arc surface of the other fixed split member is formed to have a size larger than the diameter of the arc surface of one fixed split member. A step formed on the abutting surface does not enter the inner side of the circumferential locus of the inner sliding surface. Therefore, the inner rotating body can be smoothly rotated even if a positional deviation occurs on the abutting surface between the plurality of fixed division members.
[0037]
According to the second aspect of the present invention, since the plurality of fixed division members are composed of the base member and the cover, the outer fixed body can be easily assembled by a simple assembling operation for assembling the cover to the base member.
[0038]
According to the invention of claim 3, since the arranged abutting surface of the base over the scan element and the cover to a position above the center of the inner sliding surface, the inner rotary body without increasing the width dimension of the outer fixing body It can be rotated smoothly.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a corrugated tube rotating holder according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a main part of a corrugated tube rotary holder according to an embodiment of the present invention.
FIG. 3 is an exploded cross-sectional view of an outer fixed body, showing an embodiment of the present invention.
FIG. 4 is an exploded front view of an inner rotor, showing an embodiment of the present invention.
FIG. 5 is an exploded side view of the inner rotating body according to the embodiment of the present invention.
FIG. 6 is a plan view of a rotary dividing member according to the embodiment of the present invention.
FIG. 7 is a schematic cross-sectional view of an outer fixed body, showing an embodiment of the present invention.
FIG. 8 is an enlarged schematic cross-sectional view showing a state in which each butting surface between the base member and the cover is displaced, showing an embodiment of the present invention.
FIG. 9 is an exploded perspective view of a corrugated tube rotating holder showing a conventional example.
FIG. 10 is a cross-sectional view of a corrugated tube rotating holder showing a conventional example.
FIG. 11 is an exploded sectional view of an outer fixed body showing a conventional example.
FIG. 12 is a schematic front view of an inner rotating body showing a conventional example.
FIG. 13 is a partial schematic front view showing a conventional example and showing a state in which each butted surface between the base member and the cover is displaced.
[Explanation of symbols]
20 Corrugated tube rotating holder 21 Outer fixed body 22 Inner rotating body 23 Corrugated tube 24 Base member (fixed split member)
25 Cover (fixed split member)
26 Inner sliding surface 27 Inner rotating chambers 28a, 30a Abutting surfaces 28b, 30b Arc surface 32 Outer exit surface 35 Outer sliding surface 43 Guide 43a, 43b Curved wall c Virtual circumferential trajectory

Claims (3)

An inner rotating chamber surrounded by a circumferential inner sliding surface is provided in the outer fixed body, and an inner rotating body that houses and holds the corrugated tube is accommodated in the inner rotating chamber. In the rotating holder for the corrugated tube, wherein the surface rotates the corrugated tube by sliding the inner sliding surface of the outer fixed body,
The outer fixed body is composed of a plurality of fixed divided members having arcuate surfaces on the inner periphery, assembled by abutting the butted surfaces of the plurality of fixed divided members, and each of the assembled fixed divided members. The inner sliding surface is formed by an arc surface, and one of the fixed divided members to which the abutting surfaces abut each other is straight to the end of the arc surface in a direction along the virtual circumferential locus of the arc surface. An outer withdrawal surface having a predetermined length is extended, and the other fixed dividing member has a dimension between the two distal end surfaces of the arcuate surface so as to coincide with the distal end surface of the outer withdrawal surface. Rotating holder for corrugated tube. It is a rotation holder for corrugated tubes according to claim 1,
The plurality of fixed dividing members are two members, a base member and a cover. The corrugated tube rotation holder according to claim 2,
It said base member outer exit surface are formed on the front SL base member and abutting surface of the cover rotary holder for corrugated tube, characterized in that disposed in a position above the center of the inner sliding surface .

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