Suspension wire protection cover

Abstract

To provide a hanging wire protection cover that does not require a retaining pin, and simplifies an installation and removal work at a high place.SOLUTION: A pair of split bodies 2 are so arranged as to be alternately shifted in a wire extension direction with a hanging wire interposed between the top and bottom, and semi-cylindrical parts 3 are slid, and are butted so that mutual fitting parts 6 are fitted to mutual notches 5. During this, a snap part 8 slides an inside surface of the notch 5 while bending an elastic locking piece 82, and after passing the same, elastically expands and engages with a strip groove 71 of a locking protrusion 7. By this, the split bodies 2 are mutually retained, and fitting of a protection cover 1 is completed. In order to remove the protection cover 1, the pair of split bodies 2 maybe pushed inward while simultaneously gripping the elastic locking piece 82 projection at both ends with both hands and bending the same inward.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a protective cover for overhead wires in electric railroad tracks, which eliminates the need for retaining pins and simplifies installation and removal work at high altitudes. [Background technology]

[0002] The basic form of a suspension wire protection cover is disclosed, for example, in Patent Document 1. It consists of a pair of divided bodies with a flange at one end of the semi-cylindrical part and a fitting part protruding radially at the other end, and the flanges are provided with notches into which the fitting part of the other divided body can be fitted, and the two divided bodies are slidably engaged in an alternating manner to form a spool-like shape. In the above-mentioned known example, a pin hole is drilled through a part of each of the flange and the fitting portion so as to penetrate both of them, and a split pin is inserted into this hole to prevent the divided bodies from slipping out of each other. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 60-1634 Summary of the Invention [Problem to be solved by the invention]

[0004] Installing protective covers is a high-altitude job and often requires work at night. Inserting pins into small pin holes in the dark on a ladder or work vehicle is no easy task. It is also common for split pins to be accidentally dropped. Therefore, an object of the present invention is to provide a suspension wire protection cover that does not require a locking pin and simplifies installation and removal work at high altitudes. [Means for solving the problem]

[0005] In the following description, reference will be made to the reference numerals in the accompanying drawings, but the invention is not limited thereto. To solve the above problems, the suspension wire protective cover 1 of the present invention comprises a pair of segments 2 each having a flange 4 with a notch 5 at one end of a semi-cylindrical portion 3 and a fitting portion 6 protruding radially at the other end, and is assembled like a spool by alternately engaging the pair of segments 2 in the axial direction of the semi-cylindrical portion 3, with the fitting portion 6 of one segment 2 fitting into the notch 5 of the other segment 2. Each segment 2 is equipped with a snap portion 8 consisting of a support 81 extending outward from the fitting portion 6 and a pair of arrowhead-shaped elastic locking pieces 82 connected to the tip of the support 81, and when combined with the other segment 2, the pair of elastic locking pieces 82 elastically contract and close while sliding against the opposing surfaces of the notch of the other segment 2, and when the combination is complete, they expand and engage the outer edge of the notch 5 of the other segment 2, preventing them from coming off, and can be contracted and removed by manual operation. [Effects of the Invention]

[0006] According to the present invention, the pair of divided bodies 2 are joined only by the engagement of the snap portions 8 of both bodies, so that a locking pin can be omitted, and the engagement can be released simply by pinching the elastic locking pieces 82 of the snap portions 8 with the fingers and operating to contract and close, which simplifies installation and removal work at high places. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is an exploded perspective view of the suspension wire protection cover of the present invention. [Figure 2] FIG. 2 is a perspective view of the suspension wire protection cover of FIG. 1. [Figure 3] FIG. 3 is a front view of the suspension wire protection cover of FIG. 2. [Figure 4] FIG. 3 is a plan view of the suspension wire protection cover of FIG. 2. [Figure 5] FIG. 5 is an enlarged view of a portion of FIG. [Figure 6] 3 is a front view of a divided body that constitutes the suspension wire protection cover of FIG. 2. FIG. [Figure 7] 3 is a plan view of a divided body that constitutes the suspension wire protection cover of FIG. 2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described with reference to the drawings. As clearly shown in Figures 1 and 2, the overhead wire protective cover 1 is made by combining a pair of segments 2 of the same shape and size. Each segment 2 is made of synthetic resin and has a semi-cylindrical portion 3, a flange 4 provided at one end thereof with a notch 5 in part, and a fitting portion 6 protruding radially from the other end. The pair of segments 2 are opposed to each other so as to sandwich the overhead wire W and are engaged alternately in the axial direction of the semi-cylindrical portions 3, whereby the fitting portion 6 of one segment 2 is fitted into the notch 5 of the other segment 2, and the overhead wire protective cover 1 is assembled like a spool, as shown in Figure 2.

[0009] Each divided body 2 has a pair of locking projections 7 provided on the outer surfaces of both opposing edges of the cutout 5 (outer surfaces of the flange portion), and a snap portion 8 provided on the outer surface of the fitting portion 6.

[0010] The snap portion 8 consists of a support post 81 extending outward from the fitting portion 6, and a pair of arrowhead-shaped elastic locking pieces 82 continuing from the tip of the support post 81. A finger hook protrusion 83 is provided on the outside of the tip of the elastic locking piece 82. When the pair of elastic locking pieces 82 is combined with the other divided body 2, the outer surfaces of the tip portions slide against the opposing surfaces of the cutout portion 5 of the other divided body 2 and elastically contract and close, and when the combination is complete, the elastic locking pieces 82 protrude outward from the flange portion 4 and expand, engaging with the locking protrusions 7 of the other divided body 2 to prevent them from coming loose.

[0011] When removing the protective cover 1 from the suspension wire W, the tip ends of the pair of elastic locking pieces 82 that protrude outward from the flange 4 are pinched with the fingers, bent inward, and pushed into the notch 5. At this time, the worker is wearing protective gloves, which makes it difficult to perform delicate work, but the operation is relatively easy because the fingers can be hooked on the finger hook protrusions 83.

[0012] The locking projection 7 has a groove 71 into which the tip of the elastic locking piece 82 of the other segment 2 to be combined is fitted. The cross-sectional shape of the groove 71 is formed similar to the outer shape of the tip of the elastic locking piece 82, and holds the tip of the elastic locking piece 82 when it is expanded. Therefore, the elastic locking piece 82 is not easily deformed by unexpected external force when engaged with the locking projection 7. In addition, the groove 71 has an inner wall 72 that collides with the outer side of the tip of the elastic locking piece 82 when it elastically expands, producing an engagement confirmation sound. The engagement confirmation sound confirms that the pair of segments 2 are securely joined and the protective cover 1 is attached to the suspension wire W.

[0013] When attaching the protective cover 1 to the overhead wire W, the pair of segments 2 are arranged alternately, shifted in the wire extension direction, so as to sandwich the overhead wire W from above and below, and the semi-cylindrical portions 3 are slid against each other to butt together so that the mating portions 6 fit into each other's cutouts 5. During this process, the elastic locking pieces 82 flex and slide along the inner surfaces of the cutouts 5, and when they pass the ends, the legs 8a, 9a spread apart and engage with the locking projections 7. This prevents the pair of segments 2 from coming loose from each other, completing the attachment of the protective cover 1.

[0014] To remove the protective cover 1 attached to the suspension wire W in this manner, the elastic locking pieces 82 of the snap portions 8 protruding from the flange portions 4 at both ends are pinched with the fingers and bent inward to remove them from the cutout portions 5, while shifting the pair of split bodies 2 in the direction of the wire extension. [Explanation of symbols]

[0015] 1. Suspension wire protection cover 2 split body 3 Semi-cylindrical section 4 Tsuba 5 Notch 6 Fitting part 7 Locking protrusion 71 grooves 72 Inner wall 8 Snap part 81 Post 82 Elastic locking piece 83 Finger rest protrusion W Hanger Wire

Claims

1. A suspension wire protection cover is comprised of a pair of divided bodies, each of which has a semi-cylindrical portion, a flange portion with a notch provided at one end of the semi-cylindrical portion, and a fitting portion protruding radially from the other end, and is assembled in a spool-like manner by alternately engaging the pair of divided bodies in the axial direction of the semi-cylindrical portion so that the fitting portion of one divided body fits into the notch of the other divided body, Each of the divided bodies has a snap portion made up of a support post extending outward from the fitting portion and a pair of arrowhead-shaped elastic locking pieces connected to the tip of the support post, The pair of elastic locking pieces of the snap portion, when combined with the other segment, elastically bend inward while sliding against the opposing surface of the cutout of the other segment, and when the combination is complete, they expand and engage with the outer edge of the cutout of the other segment, thereby preventing it from coming loose, and is characterized in that it can be bent inward by manual operation and removed.

2. Each of the divided bodies includes a pair of locking projections formed on the outer edge of the notch, 2. The overhead wire protection cover according to claim 1, wherein the locking projection has a groove into which the tip of the elastic locking piece of the other divided body to be combined is fitted.

3. The suspension wire protection cover as described in claim 2, characterized in that the groove of the locking protrusion has an inner wall against which the tip of the elastic locking piece collides when the elastic locking piece elastically expands, producing an engagement confirmation sound.

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