JPH0669873U - Fiber optic photoelectric switch fiber unit - Google Patents

Abstract

(57) [Summary] [Purpose] A fiber 12 and a metal wire 14 are provided side by side so that they can be bent easily so that they can be easily detected in a narrow space. A fiber unit is provided. [Structure] The fiber 12 and the bendable metal wire 14 arranged in the respective covering materials 11 and 13 are arranged side by side and joined, and a fixture 15 is arranged at the desired position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fiber unit, and in order to enable detection especially in a narrow space, an optical fiber and a metal wire are provided side by side, and a fiber unit for an optical fiber type photoelectric switch in which a fixture is arranged at a desired position. Regarding

[0002]

[Prior art]

 Conventionally, as shown in FIG. 6, a fiber unit of this type of optical fiber type photoelectric switch connects one end of a fiber arranged in a covering material 1 to an amplifier 6 having a light emitting element and a light receiving element, A fixture 4 for fixing near the object to be detected is arranged at the desired position. Then, the fixing tool 4 and a cylindrical metal sleeve 3 are arranged at the detection end, and the fiber 2 from which the coating material 1 is peeled off is inserted into the metal sleeve 3 and fixed by an adhesive or the like. It was a thing.

[0003]

[Problems to be solved by the device]

 However, since the fiber unit of the above-mentioned conventional optical fiber type photoelectric switch has the above-mentioned configuration, the fibers arranged in the metal sleeve 3 are partially fixed with an adhesive or the like, and therefore the metal sleeve is not fixed. When 3 is bent, the bonded portion between the metal sleeve 3 and the fiber 2 is peeled off, so bending of the bonded portion was prohibited. Therefore, the positioning work with respect to the object to be detected affects not only the bending of the metal sleeve 3 but also the setting of the mounting position of the fixture 4, and a lot of time is spent for the positioning work. Further, since the metal sleeve 3 has a cylindrical shape, the metal sleeve 3 is deformed by the cutting work to block the end face of the fiber 2, so that the metal sleeve 3 cannot be cut, and the length from the fixture 4 to the detection side 5 is different. It was necessary to prepare various units. An object of the present invention is to eliminate the above-mentioned problems, and to provide a fiber unit of an optical fiber type photoelectric switch which has an extremely simple structure and is inexpensive and economical.

[0004]

In order to achieve the above object, the present invention connects an optical fiber to a case body provided with a light emitting element and a light receiving element, and detects an object to be detected at the tip of the optical fiber. In the optical fiber type photoelectric switch to be used, the optical fiber arranged in each covering material and the bendable metal wire are placed side by side and joined, and the fixing tool is arranged at the desired position, The positioning is performed.

[0005]

[Action]

 According to the present invention, since the optical fiber and the bendable metal wire disposed inside the respective covering materials are placed side by side and joined together, and the fixing device is arranged at the desired position, the bend is caused by the metal wire. Since it is possible, after mounting the fixture near the detection target, bend the detection end and set the position on the detection target. In addition, it is possible to cut with a fiber cutter because the fiber and metal wire are installed side by side.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a main part of a first embodiment of the present invention, and FIG. 2 is a detection end view thereof. In FIG. 1, the fiber 12 is provided in the fiber coating material 11 for covering the fiber 12, and the metal wire 14 is provided in the metal wire coating material 13 for covering the metal wire 14, The respective covering materials 11 and 13 provided with the metal wire 12 and the metal wire 12 are placed side by side and bonded on parallel lines. Then, a fixture 15 having a screw engraved is arranged at a desired position where the fiber coating material 11 and the metal wire covering material 13 are provided side by side. The fixture 15 is attached and fixed in the vicinity of the detection target, the end face of the detection side 16 is positioned on the detection target, and the other end is connected to the amplifier side 17 in which the light emitting element and the light receiving element are arranged. FIG. 2 shows an end face in which the fiber 12 and the metal wire 14 are arranged vertically. With such a configuration, the detection side 16 can easily set the detection end on the detection target, and the amplifier side 17 can also be bent arbitrarily, so that if the part is placed along the equipment, it does not interfere. It is possible to prevent accidental accidents such as accidental hooking.

FIG. 3 is a cross-sectional view of a main part showing a second embodiment of the present invention. As in the case of FIG. 1, the fiber 22 is arranged in the fiber coating material 21, and a fixing tool 25 having a screw for mounting and fixing the fiber 22 is arranged at a desired position in the vicinity of the detection object. Then, the metal wire 24 is disposed in the metal coating 23 on the fixture 25 and the detection side 26, and the fiber coating 21 and the metal wire 24 are joined together, and the fiber 22 and the metal wire 24 are disposed vertically. Form the end face. The other end is connected to an amplifier side 27 in which a light emitting element and a light receiving element are arranged with a configuration of only a fiber 22 provided in a fiber coating material 21. With such a configuration, the amplifier side 27 becomes the fiber 22 that can be freely positioned, and the metal wire 24 is provided from the fixture 25 so that only the detection end can be bent.

FIGS. 4 to 5 show a third embodiment of the present invention, FIG. 4 is a sectional view of an essential part thereof, and FIG. 5 is a detection end view thereof. In the second embodiment of the present invention shown in FIG. 3, a heat-shrinkable coating material 38 such as a Hishi tube is provided on the detection side from the fixture to form a fiber coating material 31 having a fiber 32 and a metal wire having a metal wire 34. This is a configuration in which the side-by-side portion of the covering material 33 is covered. Instead of using the fiber coating material 31 and the metal wire coating material 33, the fiber 32 and the metal wire 34 may be provided side by side and covered with the coating material 38. Further, like a parallel cord, the fiber and the metal wire may be arranged in parallel within the same coating material. In the embodiment of the present invention, a fixing tool in which a screw for tightening and fixing with a nut is engraved is shown, but various fixing means such as fixing with an elastic member are conceivable. Further, although the embodiment of the present invention shows a basic type fiber unit, various fiber units such as a reflection type fiber unit in which a plurality of fibers are arranged are conceivable. The present invention is not limited to the above embodiments, and various modifications can be made based on the spirit of the present invention, and these modifications are not excluded from the scope of the present invention.

[0009]

[Effect of device]

 As described in detail above, according to the present invention, the following effects can be obtained. (1) Since the optical fiber and the bendable metal wire arranged inside each coating material are placed side by side and joined, and the fixture is placed at the desired position, it is extremely easy to join the optical fiber and the metal wire. An optical fiber unit of an optical fiber type photoelectric switch, which has a simple structure and is inexpensive and economical, can be obtained. (2) Since the bendable metal wire and the optical fiber arranged in each coating material are installed side by side and the fixture is placed at the desired position, the joint part of the optical fiber and the metal wire is separated. However, since the optical fiber and the metal wire can be cut separately, the length of the detection side from the fixture can be easily changed, and therefore it is not necessary to prepare various optical fibers with different lengths from the fixture to the detection side. An optical fiber unit of an optical fiber type photoelectric switch with high productivity and easy inventory management can be obtained. (3) Since the bendable metal wire and the optical fiber arranged in each coating material are placed side by side and joined, and the fixture is placed at the desired position, the optical fiber element is conventionally placed inside the stainless steel tube. Regarding the wire fixed with an adhesive, the bonded part could not be bent, but the range of the bent part is not limited, and there is an effect that bending work corresponding to the detected object can be easily performed. (4) Since the optical fiber between the photoelectric switch body and the fixture is also equipped with a metal wire, it can be bent arbitrarily and its part does not get in the way, so it can be held along with the object. There is an effect that can be easily done. (5) Since the joint part of the optical fiber and the bendable metal wire is covered with the covering member, a robust optical fiber unit of the optical fiber type photoelectric switch can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a first embodiment of the present invention.

FIG. 2 is a detection end view of the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of an essential part of a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of an essential part of a third embodiment of the present invention.

FIG. 5 is a detection end view of the third embodiment of the present invention.

FIG. 6 is a cross-sectional view of a conventional main part.

FIG. 7 is a conventional detection end view.

[Explanation of symbols]

 11, 21, 31 Fiber coating material 12, 22, 32 Fiber 13, 23, 33 Metal wire coating material 14, 24, 34 Metal wire 15, 25, 35 Fixing device 16, 26, 36 Detecting side 17, 27, 37 Amplifier Side 38 coating material

Claims (3)

[Scope of utility model registration request] 1. An optical fiber type photoelectric switch in which an optical fiber is connected to a case body provided with a light emitting element and a light receiving element, and an object to be detected is detected at a tip end portion of the optical fiber,
An optical fiber characterized in that a bendable metal wire is placed side by side with the optical fiber arranged in each covering material and joined together, and a fixing tool is arranged at a desired position to position the tip portion. Fiber unit of a photoelectric switch. 2. A bendable metal wire disposed inside the covering material is provided between the fixing member and the detection end of the optical fiber arranged inside the covering material so as to be joined. The fiber unit of the optical fiber type photoelectric switch according to claim 1. 3. The fiber unit of an optical fiber type photoelectric switch according to claim 1, wherein a part where the optical fiber and the bendable metal wire are provided together is further covered with a covering member.