JPH0673702U - Cable retainer - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cable holder that allows easy attachment of an optical fiber cable even though it is easily attached, does not disassemble the parts even when the cable is replaced, and is easy to manage. [Structure] A cable holding portion is provided in which one side of a cylindrical body having a cable hole in a longitudinal direction is expanded in an inverse taper shape, and a slit is formed in the axial direction in the inverse taper portion. It consists of a cable holder with a male thread formed in part and a stopper with an internal thread corresponding to the male thread. Abut. The tip of the cable holding part is tapered outward and used as a guide when inserting the cable. Further, the male screw and the female screw are left screws.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable holder that can securely attach a small-diameter optical fiber cable by a simple operation.

[0002]

[Prior art]

 As a conventional device for holding a small-diameter optical fiber cable, a structure as shown in FIGS. 6a and 6b is known. In the figure, reference numeral 11 denotes a cable holder having a cable hole 11 'penetrating its axis. Reference numeral 12 denotes a cable holding portion that is tapered slightly toward the tip end, and has a slit 13 formed in two parts. Reference numeral 14 denotes a male screw formed around the cable holder 11 following the holding portion 12. On the other hand, 15 is a stopper, and as shown in the cross section, a female screw 16, a tapered surface 17 and an opening 18 are formed in series. In this conventional example, in order to hold the optical fiber cable, the stopper 15 is passed through the cable in advance, the cable base end A is inserted from the tip hole of the cable holding portion 12 into the cable hole 11 ', and then the stopper 15 is inserted into the cable holder. Screw to 11. Then, the diameter of the holding portion 12 is reduced by the tapered surface 17 on the inner surface of the stopper 15, so that the cable can be fastened and fixed.

[0003]

[Problems to be solved by the device]

 By the way, recently, a small-diameter optical fiber cable is often used, and a very flexible one with a diameter of 1 mm, for example, is also provided. A metal head B is generally provided. When fixing the metal head B, the stopper 15 is inserted from the base end A side of the fiber cable into the cable hole 11 ′ of the cable holder 11. On the other hand, since the tip opening diameter of the cable holding portion 12 is about the same as the cable diameter, the flexibility of the cable and the fact that it cannot be seen from the outside when the stopper 15 is loosened allows the cable to be inserted into the cable hole 11 '. Is hard. Therefore, it was troublesome to remove the stopper 15 from the cable holder 11 once, and it was found that the holder 11 and the stopper 15 after the removal were lost. Furthermore, the fiber end face could be scratched during insertion.

The present invention solves the above-mentioned problems of the related art. Even though the optical fiber cable is easy to install, it can be firmly tightened, and even when the cable is replaced, the parts do not come apart and are managed. The purpose of the present invention is to provide a cable holder that is easy to operate.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention employs a cable holder comprising two parts, a cable holder and a stopper. The cable holder consists of a cylindrical body with a cable hole in the longitudinal direction of the shaft center. One side of the cable holder is a cable holding part that expands in a reverse taper shape, and a slit is formed in the cable holding part in the axial direction. At the same time, a male screw is formed continuously with the cable holding part. Further, the stopper is provided with a female screw corresponding to the above male screw on the inner circumference. Then, the male screw and the female screw of these two members are screwed together to reduce the diameter of the reverse taper portion of the cable holding portion on the inner peripheral surface of the stopper.

Further, means for providing a guide that expands outward and means for making a male screw and a female screw left screws are selectively used in the opening of the cable holding portion.

[0007]

[Action]

 The slot provided in the cable holding part of the cable holder contributes to the action of pressing the cable from the entire circumference.By screwing both screws, the reverse taper part reduces the inner peripheral surface of the stopper. By doing so, the cable hole is narrowed down by the slot. This holds the cable. Also, the tapered opening functions as a guide when inserting the base end of the optical fiber cable into the cable hole, and facilitates insertion. Furthermore, the male screw and female screw set as the left screw have the function of maintaining the environment familiar to the worker.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The basic structure of this embodiment comprises a cable holder 1 and a stopper 2 shown in FIG. 1 and 2, the cable holder 1 is a cylindrical body, and a cable hole 3 for holding the cable C is provided in the longitudinal direction of the shaft center, and a tip portion has a step portion D '. A cable holding portion 5 is provided which is connected to the stop portion D and whose outer diameter is expanded in a reverse taper shape and which has a slit 4 formed in four divisions. Further, the opening side of the locking portion D is a taper opening that is open outward, and serves as a guide 6 for inserting a cable. Following the cable holder 5, a male screw 7 is provided on the outer circumference of the cable holder. This male screw 7 is molded into a left screw. Reference numeral 8 is a chamfered portion for preventing slippage of the joint 10 described later. The cable holding portion 5 is divided into four by the slot 4, but may be divided into two, for example. Next, the stopper 2 is formed with a female screw 9 which is a left screw corresponding to the male screw 7 on the inner periphery thereof, and a knurled member is formed on the periphery for facilitating the operation.

In the above-described structure, in order to mount the optical fiber cable, first, the stopper 2 is inserted from the end side of the cable holder 1 and brought into a fitted state. Next, the base end of the cable C is inserted into the cable hole 3 using the guide 6 as a guide (see FIG. 3a). In this state, the cable holding portion 5 has not been reduced in diameter yet, so the work is smooth. After adjusting the insertion position of the cable base end, by rotating the stopper 2 and advancing the screwing, the diameter of the cable holding portion 5 is reduced while the end surface of the stopper 2 contacts the reverse taper surface of the cable holding portion 5. Make sure to tighten the optical fiber cable. In this state, the end surface of the stopper 2 and the step portion D'of the locking portion D are in close contact with each other, and there is no gap in each slot 4 (see FIG. 3b). In this way, after adjusting and fixing the position of the cable, it is inserted into the socket provided in the box such as the optical sensor E, and attached to the box by the attachment device F provided separately. , A series of work is completed.

In this embodiment, the male screw 7 of the cable holder 1 and the female screw 9 of the stopper 2 are left-handed screws. By adopting this technology, it is possible to prevent work mistakes due to the illusion. That is, since the left screw is formed, if the stopper 2 is turned counterclockwise in the direction of arrow B, for example, during maintenance work after the cable is attached as shown in FIG. It moves inward as shown, which allows the cable to be pulled out easily. The worker works from the position facing the main body, but most of the usual screws are right-handed screws, and if you rotate the nut clockwise, you tighten it, and if you rotate it counterclockwise, you get used to it. There is. In the present embodiment as well, by utilizing this familiarity, the work can be performed with the sensation of tightening or loosening the stopper 2 based on the position of the worker. As a result, it is possible to perform work without feeling awkward with familiar movements. On the other hand, when inserting the cable, if the stopper 2 is rotated clockwise in the direction of arrow A, the stopper 2 advances to the locking portion D side as shown by arrow a, and the cable is securely fixed. Nor .

Next, FIG. 4 and FIG. 5 show the joint of the cable holder 1. If the joint 10 is engaged with the chamfered portions 8 of the pair of cable holders, it is not necessary to check the pair relationship of the cables one by one when performing the work, and the work can be performed efficiently. The joint 10 is intended to engage the pair of cable holders 1 with each other, and the shape thereof is not limited to the embodiment, but in the embodiment, the two engaging portions 11 and 11 are formed. Are connected by an inverted U-shaped connecting portion 12. If the engaging portion 11 is provided with the notch 13 and at the same time is entirely molded with a relatively soft synthetic resin, when the cable holder 1 is attached, the notch 13 is indicated by a broken line. It can be done easily in the open position. Further, since the inner surface of the engaging portion 11 is chamfered so as to correspond to the chamfered portion 8 of the cable holder 1, when the joint 10 is mounted on the chamfered portion 8, the joint 10 itself does not slip sideways. . Further, when the cable holder 1 is pulled out by loosening the mounting device F on the optical sensor E side when replacing the cable, the stopper 2 does not come out of the cable holder 1 even if the stopper 2 is rotated in the loosening direction. Further, even when it is used for another sensor in which the pitches of the light projecting section and the light receiving section are different, since the connecting section 12 expands and contracts, it is widely applicable.

[0012]

[Effect of device]

 Since the present invention has the above-mentioned configuration, the cable can be held securely by a simple operation when inserting the base end of the optical fiber cable, and even if the cable is replaced, the old cable can be pulled out simply by loosening the stopper. It is possible and easy to work with. Moreover, it is not necessary to remove the stopper when exchanging the cable, and as shown in FIG. 3a, the cable can be exchanged while screwed. Therefore, it was possible to completely avoid deterioration of efficiency due to loss of parts during work as in the past.

Further, when the cable holding portion is provided with the guide, the guide becomes a guide for inserting the base end of the cable, and the work becomes easier. Further, when the left-hand screw is used, the worker can perform the work as if he / she was familiar with the right-hand screw, and it is possible to prevent a decrease in efficiency and a mounting error due to a feeling of discomfort during the work.

[Brief description of drawings]

FIG. 1 is a perspective view of a cable holder,

FIG. 2 is a sectional view of the same.

3A is a partial cross-sectional view before tightening the stopper, FIG. 3B is a partial cross-sectional view after tightening,

FIG. 4 is a perspective view showing a state where it is attached to an optical sensor box,

FIG. 5 is a perspective view of a joint,

6A is a perspective view showing a conventional example, and FIG. 6B is a sectional view of a cable holder and a stopper of the conventional example.

[Explanation of symbols]

 1 Cable Holder 2 Stopper 3 Cable Hole 4 Slotting 5 Cable Retaining Part 6 Guide 7 Male Screw 8 Chamfering Part 10 Joint 11 Engaging Part 11 12 Connecting Part 13 Notch

Claims (3)

[Scope of utility model registration request] 1. A cylinder holding a cable body having a cable hole in a longitudinal direction, wherein one side of the cylinder body is expanded into an inverse taper shape, and a slit is formed in the axial direction with respect to the inverse taper part. The cable holder has a male screw formed on a part of its surface, and a stopper having a female screw corresponding to the male screw provided on the inner circumference thereof. A cable holder that is in contact with the reverse taper. 2. The cable holder according to claim 1, wherein the tip of the cable holding portion is expanded outward in a tapered shape to serve as a guide for inserting the cable. 3. The cable holder according to claim 1, wherein the male screw and the female screw are left-handed screws.