JP2017167187A - Rubber bush, cable fixing structure using rubber bush, and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable fixing structure using a rubber bush capable of attaching a plurality of cables with different size.SOLUTION: Disclosed rubber bush has a hollow cylindrical shape having a hole formed for inserting cables. The outer periphery surface is constituted of a conical frustum shaped part having a tapered shape and a cylindrical shaped part continued to the tapered shape, and the rubber bush has a stepped discontinuity.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rubber bush and a cable fixing structure and method using the rubber bush.

  As one form of the projector, as disclosed in Patent Document 1 (Re-Table 2013/136517), each color of a color from a laser light source that outputs laser light of red, green, blue or the like from an optical fiber cable is disclosed. Some laser beams are taken into a projector via an optical fiber cable and used as illumination light.

  The thickness (diameter) of the optical fiber cable that transmits light of each color is the same regardless of the color in consideration of commonality of components.

  However, when performing the work of attaching the fiber optic cable to the projector, there is a risk that the fiber optic cable to be attached cannot be distinguished from what color light is transmitted, so that it may be attached incorrectly. .

Table 2013/136517

  As described above, in order to make it easy to confirm how many colors of light the optical fiber cable transmits, it is also effective to vary the thickness of the optical fiber cable for each color to be transmitted. Naturally, different thicknesses are also effective in the case of cables having different applications, for example, the magnitude of current to be transmitted is different.

  When attaching cables with different thicknesses to projectors or other equipment, common parts can be used for brackets and nuts to secure the cables, but the bush portion is a size that matches the diameter of each cable. Must be used, and a bush corresponding to the thickness of the cable is required. As the number of types of bushes increases, the cost of the mold necessary for manufacturing the bushes increases accordingly, and the manufacturing cost of parts increases.

  The present invention realizes a cable fixing structure using a rubber bush capable of attaching a plurality of cables having different thicknesses.

  The rubber bush according to the present invention has a hollow cylindrical shape in which a hole for inserting a cable is formed, and an outer peripheral surface is constituted by a truncated cone-shaped portion having a tapered shape, and a cylindrical shape portion connected to the tapered shape, and a staircase. -Shaped cut.

The cable fixing structure according to the present invention has a hollow cylindrical shape in which a first hole for inserting a cable is formed, and a frustoconical portion having an outer peripheral surface tapered, and a cylindrical portion continuous with the tapered shape. A rubber bush that is configured and has stepped cuts;
An open end into which the rubber bush is inserted, a side portion that comes into contact with a circumferential surface of the columnar portion when the rubber bush is inserted from the columnar portion side, and a flat portion that supports the bottom of the columnar portion A bracket that is attached to the panel, and a wall surface having a taper surface that is formed so that the diameter expands toward the open end.
A second hole for inserting the cable, and a nut screwed with the bracket,
The rubber bush is inserted into the bracket in a state where a cable is inserted through the first and second holes, and the bracket and the nut are screwed together.

The cable fixing method according to the present invention has a hollow cylindrical shape in which a first hole for inserting a cable is formed, and a frustoconical portion having a tapered outer peripheral surface, and a cylindrical portion continuous with the tapered shape. A rubber bush that is configured and has stepped cuts;
An open end into which the rubber bush is inserted, a side portion that comes into contact with a circumferential surface of the columnar portion when the rubber bush is inserted from the columnar portion side, and a flat portion that supports the bottom of the columnar portion A bracket that is attached to the panel, and a wall surface having a taper surface that is formed so that the diameter expands toward the open end.
A cable fixing method using a nut provided with a second hole for inserting the cable and screwed with the bracket,
The rubber bush is inserted into the bracket in a state where a cable is inserted through the first and second holes, and the bracket and the nut are screwed together.

  In this invention provided with said structure, it becomes possible to attach the some cable from which thickness differs.

It is a perspective view which shows the structure of one Embodiment of the rubber bush used for the cable fixing structure by this invention. It is a perspective view which shows the state which fixes the optical fiber cables 6 and 7 from which thickness differs to the bracket 5 provided in the panel 4 of the projector. 2 is a perspective view showing a state in which an optical fiber cable 6 thicker than the inner diameter of the rubber bush 1 is fitted into the rubber bush 1. It is a figure which shows the fixed state of an optical fiber cable in detail, (a) is a front view which shows the state by which the optical fiber cables 6 and 7 were attached to the panel 4, (b), (c) is (a). Sectional drawing which each shows an AA line cross section in the inside, and a BB line cross section, (d), (e) expands and shows the fitting part enclosed with the dashed-dotted line in (b), (c). It is sectional drawing.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a configuration of an embodiment of a rubber bush used in a cable fixing structure according to the present invention.

  A rubber bush 1 shown in FIG. 1 has a hollow cylindrical shape in which a hole 12 for inserting a cable is formed, and an outer peripheral surface is a truncated cone-shaped portion having a tapered shape 3 and a cylindrical portion that is continuous with the tapered shape 3 11 and a step-like cut 2 is provided.

  FIG. 2 is a perspective view showing a state in which the optical fiber cables 6 and 7 having different thicknesses are fixed to the bracket 5 provided on the panel 4 of the projector.

  The open end of the bracket 5 includes a wall surface portion 10 including a side surface portion that contacts the circumferential surface of the columnar portion 11 of the rubber bush 1 and a flat portion that supports the bottom portion of the columnar portion 11, and an open end from the wall surface portion 10. A tapered surface 9 is provided so that the diameter increases toward the portion. Both the nut 8 provided with a hole through which the optical fiber cable is inserted and the bracket 5 are provided with a screw, and the optical fiber cable is inserted into the hole of the nut 8 and light is supplied to the hole 12 of the rubber bush 1. The optical fiber cable is fixed to the panel 4 by inserting the fiber cable and screwing the nut 8 into the bracket 5.

  The diameter (inner diameter) of the hole 12 formed in the rubber bush 1 is substantially the same as the diameter of the optical fiber cable 7, and the optical fiber cable 6 has a larger diameter than the optical fiber cable 7.

  When the optical fiber cable 6 that is thicker than the inner diameter of the rubber bush 1 is fitted into the rubber bush 1, the rubber bush 1 expands as shown in FIG. 3, but the stepped cut 2 of the rubber bush 1 expands. Thus, when viewed from the direction of arrow A, the direction of the panel 4 cannot be seen by the width of the cut 2 and no light leakage occurs.

  FIG. 4 is a diagram showing in detail the fixing state of the optical fiber cable. Hereinafter, the fixing method of the optical fiber cable according to the present embodiment will be described with reference to FIG. 4 together with FIGS.

  4A is a front view showing a state where the optical fiber cables 6 and 7 are attached to the panel 4, and FIGS. 4B and 4C are cross-sectional views taken along line AA in FIG. FIGS. 4D and 4E are cross-sectional views showing an enlarged view of a fitting portion surrounded by a one-dot chain line in FIGS. 4B and 4C. .

  As shown in FIGS. 4A to 4C, optical fiber cables 6 and 7 are fixed to two brackets 5 provided on the panel 4. The optical fiber cable 6 is attached to the left bracket 5 in FIG. 4A, and the optical fiber cable 7 is attached to the right bracket 5 in FIG. 4A.

  In the rubber bush 1, the direction of the taper shape 3 is different between when the optical fiber cable 6 is fixed and when the optical fiber cable 7 is fixed.

  When fixing the optical fiber cable 6 in which the cut 2 of the rubber bush 1 is expanded as shown in FIG. 3, the rubber bush 1 has a narrow end portion with a tapered shape 3 as shown in FIG. Is inserted into the bracket 5 from the side. The tapered shape 3 and the tapered surface 9 provided on the bracket 5 are in close contact with each other at the time of insertion shown in FIG. Each of the bracket 5 and the nut 8 is provided with a screw, and the optical fiber cable 6 is fixed to the panel 4 by tightening the nut 8 and screwing the screw provided thereto.

  When an optical fiber cable 7 having a diameter smaller than that of the optical fiber cable 6 is attached, the comb bush 1 has a shape as shown in FIG. For this reason, the outer diameter of the rubber bush 1 is smaller than that shown in FIG. Therefore, as shown in FIG. 4D, when the rubber bush 1 is inserted into the bracket 5 from the side of the narrow end of the taper shape 3, the taper surface 3 and the taper surface 9 provided on the bracket 5 are not in close contact with each other. That is, the optical fiber cable 7 cannot be fixed. For this reason, when the optical fiber cable 7 is attached, the rubber bush 1 is inserted into the bracket 5 from the side where the cylindrical portion 11 is provided, as shown in FIG.

  The wall surface portion 10 provided in the bracket 5 includes a side surface portion 10 a that abuts on the circumferential surface of the columnar portion 11 of the rubber bush 1 and a flat portion 10 b that supports the bottom portion of the columnar portion 11. The optical fiber cable 7 is fixed to the panel 4 by tightening and screwing the screws provided on them.

  As described above, in this embodiment, it is possible to fix two types of optical fiber cables having different diameters by combining one type of rubber bush, bracket, and nut while also preventing light leakage.

  In addition, the basic shape is compatible with cables with two diameters, but rubber bushes can use elastic deformation of rubber and are fixed in the same way for cables with a slight change in the above two diameters. It becomes possible to do.

  In each embodiment described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration.

A part or all of the above-described embodiment can be described as follows, but is not limited to the following configuration.
(Additional remark 1) It has a hollow cylindrical shape in which a hole for inserting a cable is formed, and an outer peripheral surface is constituted by a truncated cone-shaped portion having a tapered shape and a cylindrical shape portion connected to the tapered shape, and has a stepped cut With rubber bush.
(Additional remark 2) It has a hollow cylindrical shape in which a first hole for inserting a cable is formed, and an outer peripheral surface is constituted by a truncated cone-shaped portion having a tapered shape, and a cylindrical shape portion connected to the tapered shape, and a staircase A rubber bush having a shape-like cut;
An open end into which the rubber bush is inserted, a side portion that comes into contact with a circumferential surface of the columnar portion when the rubber bush is inserted from the columnar portion side, and a flat portion that supports the bottom of the columnar portion A bracket that is attached to the panel, and a wall surface having a taper surface that is formed so that the diameter expands toward the open end.
A second hole for inserting the cable, and a nut screwed with the bracket,
A cable fixing structure in which the rubber bush is inserted into the bracket in a state where a cable is inserted into the first and second holes, and the bracket and the nut are screwed together.
(Appendix 3) In the cable fixing structure described in Appendix 2,
The taper surface is inserted into the bracket from the frustoconical portion side, with the rubber bush having an outer shape expanded by inserting a cable having a diameter larger than the diameter of the first hole into the first hole. And a cable fixing structure that comes into close contact with the tapered shape of the truncated cone portion.
(Additional remark 4) It has a hollow cylindrical shape in which a first hole for inserting a cable is formed, and an outer peripheral surface is constituted by a truncated cone-shaped portion having a tapered shape, and a cylindrical shape portion connected to the tapered shape, and a staircase A rubber bush having a shape-like cut;
An open end into which the rubber bush is inserted, a side portion that comes into contact with a circumferential surface of the columnar portion when the rubber bush is inserted from the columnar portion side, and a flat portion that supports the bottom of the columnar portion A bracket that is attached to the panel, and a wall surface having a taper surface that is formed so that the diameter expands toward the open end.
A cable fixing method using a nut provided with a second hole for inserting the cable and screwed with the bracket,
A cable fixing method in which the rubber bush is inserted into the bracket in a state in which a cable is inserted into the first and second holes, and the bracket and the nut are screwed together.

DESCRIPTION OF SYMBOLS 1 Rubber bush 2 Cut | interruption 3 Tapered shape 4 Panel 5 Bracket 6, 7 Optical fiber cable 8 Nut 9 Tapered surface 10 Wall surface part 11 Cylindrical part 12 Hole

Claims (4)

A rubber bush having a hollow cylindrical shape in which a hole for inserting a cable is formed, an outer peripheral surface including a truncated cone-shaped portion having a tapered shape, and a cylindrical portion connected to the tapered shape, and having a stepped cut . It has a hollow cylindrical shape in which a first hole for inserting a cable is formed, and an outer peripheral surface is constituted by a truncated cone-shaped portion having a tapered shape, and a cylindrical shape portion connected to the tapered shape, and has a stepped cut. A rubber bush having
An open end into which the rubber bush is inserted, a side portion that comes into contact with a circumferential surface of the columnar portion when the rubber bush is inserted from the columnar portion side, and a flat portion that supports the bottom of the columnar portion A bracket that is attached to the panel, and a wall surface having a taper surface that is formed so that the diameter expands toward the open end.
A second hole for inserting the cable, and a nut screwed with the bracket,
A cable fixing structure in which the rubber bush is inserted into the bracket in a state where a cable is inserted into the first and second holes, and the bracket and the nut are screwed together. The cable fixing structure according to claim 2,
The taper surface is inserted into the bracket from the frustoconical portion side, with the rubber bush having an outer shape expanded by inserting a cable having a diameter larger than the diameter of the first hole into the first hole. And a cable fixing structure that comes into close contact with the tapered shape of the truncated cone portion. It has a hollow cylindrical shape in which a first hole for inserting a cable is formed, and an outer peripheral surface is constituted by a truncated cone-shaped portion having a tapered shape, and a cylindrical shape portion connected to the tapered shape, and has a stepped cut. A rubber bush having
An open end into which the rubber bush is inserted, a side portion that comes into contact with a circumferential surface of the columnar portion when the rubber bush is inserted from the columnar portion side, and a flat portion that supports the bottom of the columnar portion A bracket that is attached to the panel, and a wall surface having a taper surface that is formed so that the diameter expands toward the open end.
A cable fixing method using a nut provided with a second hole for inserting the cable and screwed with the bracket,
A cable fixing method in which the rubber bush is inserted into the bracket in a state in which a cable is inserted into the first and second holes, and the bracket and the nut are screwed together.

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