Suspension wiring protective cover

Abstract

To greatly reduce a burden on an operator without increasing cost in a detaching operation of a suspension wiring protective cover.SOLUTION: In a suspension wiring protective cover 1 in which a pair of half-split bodies 10 having a flange 11 on one end side and an engaging part 12 on the other end side is engaged to constitute a yarn member and fixed in engagement by fixing means to be fitted to a suspension wiring, the fixing means is a spring anchor 70, and a horizontal middle part 70c thereof is provided so as to be rotatable on the outer surface side of the engaging part 12 and restorable to an initial position by a restoration force during rotation. The middle part 70c of the anchor 70 slides on a guide surface 113 of a side surface in left and right bulging parts 111 and 112 of a notch 110 of the flange 11 to rise in a centrifugal direction along with sliding motion for engaging the half-split bodies 10, falls by the restoration force over the top of the guide surface 113, and stops on the outer end surfaces of the engaging part 12 and the bulging parts 111 and 112 to fix the engagement.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a suspension wire protection cover that is attached to the portion of an electric train line where a hanger ear is hung on a suspension wire. [Background technology]

[0002] A suspension wire protective cover is a cylindrical resin product that is attached to a suspension wire to prevent contact between the suspension wire and the hanger. As described, for example, in Japanese Utility Model Laid-Open Publication No. 60-1634 (Patent Document 1), it consists of a pair of half-pieces with a flange on one end of a hollow cylindrical portion and an engaging portion that protrudes radially on the other end, and the flange has a notch formed in which the engaging portion can be fitted.The pair of half-pieces are clamped around the suspension wire and slid axially to engage them alternately, thereby attaching the cover to the suspension wire.

[0003] In this type of suspension wire protection cover, to secure the engagement between the halves after installation, a split pin is inserted into a pin hole that passes through both the flange and the engaging part fitted into it, and the tip that protrudes from the other side is bent with a tool to prevent it from falling off. However, this installation work is usually done at night between the last train and the first train, and it has to be done at a high place where it is dark. In addition, it requires handling small split pins while wearing gloves, and dropping or losing them on the tracks can lead to serious accidents, so it is absolutely unacceptable. In addition, it is a heavy burden on the workers who are required to install the cover reliably and quickly.

[0004] In addition, the pair of halves are made up of different parts, with the left and right engagement sections having different concave and convex structures to allow the semi-cylindrical parts to overlap and slide while engaging with each other. Furthermore, it is not easy for an operator to visually check, in a dimly lit high place, whether the engagement between the halves and the locking mechanism with the split pin are securely performed.

[0005] To address this problem, Japanese Patent Application Laid-Open No. 2014-189163 (Patent Document 2) proposes a bent portion that allows the split pin to bend and press against the inner surface of the pin hole before being inserted, and a folded-back anti-slip portion at the tip of the bent portion, which is exposed from the exit of the pin hole and engages with the fixed portion, making it impossible to remove.

[0006] As a result, the prevention of slipping out can be achieved simply by inserting the split pin after the half bodies are engaged, eliminating the need to bend the tip of the inserted split pin with a tool to prevent it from slipping out.In addition, the split pin can be removed by simply pushing the anti-slip part into the pin hole while elastically deforming it, making it easier to attach and remove the suspension wire protection cover.

[0007] However, even with this suspension wire protection cover, it is still not easy to insert and remove the small split pins at night while wearing gloves, and it is also not easy to visually check in the dark whether the engagement of the halves and the split pin's retention have prevented them from falling out, so it must be said that the reduction in the burden on the worker is still insufficient. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Utility Model Application Publication No. 60-1634 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-189163 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention is intended to solve the above-mentioned problems, and aims to significantly reduce the burden on workers when attaching and detaching a suspension wire protection cover while preventing falling objects from occurring. [Means for solving the problem]

[0010] Therefore, the present invention provides a suspension wire protective cover that is comprised of a half-split body having a flange at one end of a hollow semi-cylindrical portion divided into two along the axial direction and an engaging portion protruding in the centrifugal direction at the other end, and a fixing means, and that is attached to the suspension wire by closely contacting the pair of half-split bodies facing each other across the suspension wire and sliding them in the axial direction while inserting and engaging the engaging portion into a notch formed in the flange to form a single spool-like member, and fixing the engaged state with the fixing means, wherein the fixing means is a spring-like fastening portion, and both ends are engaged so that the horizontally facing middle portion can rotate on the outer surface of the engaging portion. By being journalled at the mating portion, the intermediate portion is arranged in a state in which it can be restored to its initial position by the restoring force in the positive rotation direction that is generated when the intermediate portion is lifted in the centrifugal direction, and a bulge portion that protrudes from the outer end surface of the flange is formed on both the left and right sides of the cutout portion, and as the half bodies slide together when they are engaged with each other, the intermediate portion of the fastening portion is lifted in the centrifugal direction while sliding on guide surfaces formed on the inner surfaces of both the bulge portions, and when it passes the top of the guide surfaces it descends due to the restoring force and stops on the outer surfaces of both the bulge portions, thereby fixing the engaged state.

[0011] In this way, a springy fastening part that is journaled on the outer surface of the engagement part is used as the fixing means, and the horizontal part, or middle part, overcomes the bulge part and returns to its original position due to its spring elasticity, automatically fixing the engagement state.This means that the attachment and fixing to the suspension line can be completed simply by sliding the halves together, without the worker having to operate the fastening part.In addition, even in dimly lit conditions and while wearing gloves, the work can be done easily while preventing objects from falling.In addition, the worker can feel the sound and response when the fastening part overcomes the bulge part and reaches the fixed position (initial position), so that he or she can recognize that the halves have been securely fixed in an engaged state without having to look at it.

[0012] In the suspension wire protection cover of the present invention, the fastening portion is a part formed by bending both ends of a springy member sideways into an approximately C-shape so that they face each other, and by providing a difference in the axial height of the both ends, a twist is formed between the both ends with the middle part as the axis, and the tips of the both ends are inserted into mounting holes formed on the left and right sides of the engaging portion, respectively, and when the middle part rotates, the spring elasticity generates the restoring force.If this is the case, then the attached springy fastening portion alone serves as both a fixing hook member and a means for applying a spring force to it.

[0013] In the suspension line protection cover of the present invention, the fastening portion is characterized in that it maintains the angular position reversed from the initial position due to a restoring force in the reverse rotation direction that is generated when the intermediate portion is rotated from the initial position toward the inside of the engagement portion to a predetermined angular position at which the direction of the restoring force is reversed.When removing the suspension line protection cover, simply rotating the spring-like fastening portion from its initial position to the reversed position will cause the fastening portion to remain stopped in that position, making it easy to release the engagement between the half bodies and remove the suspension line protection cover. [Effects of the Invention]

[0014] According to the present invention, the middle part of the spring-like fastening part, which is journalled to the engaging part, slides up along the guide surface of the bulging part as the halves slide against each other when engaged, and automatically fixes the engaged state by passing over the peak, thereby greatly reducing the burden on the worker when attaching and detaching the suspension wire protection cover. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view of a suspension wire protection cover according to an embodiment of the present invention; [Figure 2] FIG. 2 is a front view of the overhead wire protection cover shown in FIG. 1. [Figure 3] FIG. 2 is a rear view of the overhead wire protection cover shown in FIG. 1. [Figure 4] FIG. 2 is a plan view of the suspension wire protection cover shown in FIG. 1. [Figure 5] FIG. 2 is a right side view of the suspension wire protection cover shown in FIG. 1. [Figure 6] FIG. 2 is a perspective view of a half of the suspension wire protection cover shown in FIG. 1. [Figure 7] 2A, 2B, 2C, and 2D are plan, left, front, and right side views, respectively, of the spring-like fastening portion of the overhead wire protection cover shown in FIG. 1. [Figure 8] 2A to 2D are (a) plan view, (b) left side view, (c) front view, and (d) right side view showing fastening portions of different shapes in the suspension wire protection cover shown in FIG. 1 . [Figure 9] 2 is a front view of a pair of half bodies constituting the suspension wire protection cover of FIG. 1, arranged in a position where they are engaged with each other. [Figure 10] FIG. 10 is a perspective view of FIG. [Figure 11] FIG. 10 is a front view showing the process of sliding the half body from the state shown in FIG. 9. [Figure 12] FIG. 12 is a perspective view of FIG. [Figure 13] FIG. 12 is a front view showing a state in which the half bodies have been further slid from the state shown in FIG. 11 to complete engagement. [Figure 14] A partially enlarged view showing the state in which the intermediate part of the fastening part has been rotated inward toward the engaging part to an angular position where the direction of its restoring force is reversed from the state in which the engagement of the pair of half bodies in the suspension wire protection cover shown in Figure 1 has been completed. [Figure 15] (a) Plan view, (b) Front view, and (c) Left side view of the half-body of the suspension wire protection cover shown in Figure 1 before the spring-like fastening part is attached, looking from the direction of line AA to line BB. [Figure 16] (a) Plan view, (b) Front view, and (c) Left side view looking from the CC line direction to the DD line, showing the half-split body of the suspension wire protection cover shown in Figure 1 before the spring-like fastening part is installed. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0017] 1 to 5 show a suspension wire protection cover 1 according to this embodiment, with Fig. 1 being a perspective view, Fig. 2 being a front view, Fig. 3 being a rear view, Fig. 4 being a plan view, and Fig. 5 being a right side view. This suspension wire protection cover 1 is a resin product that is attached to the portion of the suspension wire that suspends the contact wire in an electric train line where the hanger ear is hung, in order to prevent the hanger ear from coming into contact with the suspension wire, and is made up of a combination of a pair of half bodies 10, 10 formed by splitting a spool-shaped member in half along the axial direction, and a fixing means for fixing them in place.

[0018] The half-body 10 has a flange 11 at one end of a hollow half-cylindrical portion 13 and an engaging portion 12 protruding in the centrifugal direction at the other end (see Figure 6). The pair of half-body 10, 10 are placed face to face and in close contact with each other, and are slid axially, and the engaging portion 12 is inserted into and engaged with a notch 110 formed in the flange 11 to form a spool-like member, and the member is attached to the suspension wire with the engagement fixed by a fixing means.

[0019] The present invention is characterized in that the fixing means is not a split pin as in the conventional example, but rather uses a springy fastening part 70, as shown in Figure 7, which is formed by bending both ends of a springy member such as a spring steel wire or a synthetic resin molded product into a roughly C-shape that is turned sideways so that they face each other, and the tip portions of both ends 70a, 70b of fastening part 70 are inserted into mounting holes 121a, 121b formed on the left and right side surfaces of engaging part 12, as shown in Figure 5, so that the roughly horizontally facing middle part 70c is pivotally supported on the outer surface of engaging part 12 in a rotatable state.

[0020] This fastening portion 70 is arranged in a tilted state in the extension direction of the axis passing through the center of the cylindrical space formed inside the semi-cylindrical portions 13, 13, and is characterized in that the portions where both end portions 70a, 70b are connected while bending relative to the horizontally facing middle portion 70c are at different connection angles relative to the axis of the middle portion 70c.

[0021] That is, both ends of the springy member are bent sideways in a roughly C-shape so as to face each other, and there is a difference in the axial height of both ends 70a, 70b, and the tip of end 70a is formed to be inclined downward at a predetermined angle θ (6° in this embodiment), causing a twist in both ends 70a, 70b around the middle part 70c as an axis.

[0022] As a result, the fastening part 70 attached to the engaging part 12 generates a repulsive force (restoring force) due to the spring elasticity when the middle part 70c is rotated. Therefore, simply by attaching the fastening part 70 to the engaging part 12, it can serve as both a fastening member for fixing and a means for applying a biasing force due to the spring elasticity to the fastening member, thereby minimizing the number of parts.

[0023] Here, the distance between the mounting holes 121a, 121b is slightly narrower than the distance between the two end portions 70a, 70b of the fastening portion 70, and a repulsive force (restoring force) acts to keep the middle portion 70c in the initial position (see Figure 6) in contact with the stopper 122 formed in the engagement portion when the fastening portion 70 is mounted.

[0024] On the other hand, bulges 111, 112 protruding from the outer end surface of the flange 11 are formed on both the left and right sides of the cutout portion 110, and as the half bodies 10, 10 are slid together to engage with each other, the fastening portion 70 automatically engages with the outer surface of the bulges 111, 112 to fix the engaged state; this is a characteristic feature of the present invention, as will be described later.

[0025] The shape of the springy fastening part may be, as in fastening part 80 shown in Figure 8, formed by bending both ends of a springy material such as a spring steel wire or a synthetic resin molded product sideways into a roughly C-shape so that they face each other, with a difference in axial height between both ends 80a, 80b and the tip of end 80b being inclined downward at a predetermined angle θ (6° in this embodiment), and both ends 80a, 80b may be twisted around intermediate part 80c as an axis.

[0026] The assembly process will be described below with reference to the drawings shown in FIGS. First, from the positional relationship shown in FIGS. 9 and 10 in which the half bodies 10, 10 are arranged facing each other, the hollow semi-cylindrical portions 13, 13 are aligned and slid in the axial direction.

[0027] Figures 11 and 12 show the process of sliding the half-body 10, 10 from the state shown in Figure 9, and the middle part 70c of the fastening part 70, which is tilted in the direction of the axis, slides on the guide surface 113 formed by sloping on the inner surfaces of both mountain-shaped bulges 111, 112 while also protruding in the centrifugal direction, and is raised in the centrifugal direction.

[0028] By further sliding the half bodies 10, 10 from the state shown in Figure 11, the middle part 70c of the fastening part 70 passes over the top of the guide surface 113 as shown in Figure 13, and descends in the positive rotation direction (clockwise) due to the restoring force caused by the spring elasticity generated in the fastening part 70.

[0029] Due to the action of the fastening portion 70 accompanying the sliding movement of these half bodies 10, 10 relative to one another, as shown in the engaged state of the suspension line protection cover 1 shown in Figures 1 to 5, the intermediate portion 70c of the fastening portion 70 passes beside the left and right bulging portions 111, 112, and stops on the outer surfaces of the engaging portion 12 and both bulging portions 111, 112 while horizontally spanning the cutout portion 110, thereby preventing the half bodies 10, 10 from separating in the axial direction and automatically fixing the engaged state.

[0030] In this way, by utilizing the spring elasticity of the spring retaining portion 70 attached to the engaging portion 12, which generates a restoring force in the positive rotation direction (clockwise) caused by the spring elasticity generated when the portion is rotated, the engaging portion 12 and both bulging portions 111, 112 are stopped in a pressed state to fix the engaged state. As a result, the worker attaching or detaching the suspension wire protection cover 1 can complete the attachment and fixing work to the suspension wire by simply sliding the half bodies 10, 10 against each other without having to directly operate the retaining portion 70.

[0031] Furthermore, since the worker can hear and feel a "click" when the middle portion 70c of the fastening portion 70 passes over the apex of the slopes of both bulging portions 111, 112 and reaches the fixed position (initial position), the worker can recognize the secure engagement of the half bodies 10, 10 and their fixed state without the need for visual confirmation, even in dark conditions at night.Furthermore, the worker can easily attach and detach the suspension wire protection cover 1 even while wearing gloves, and the work can be performed easily while preventing falling objects.

[0032] Furthermore, in the suspension wire protection cover 1 of this embodiment, the spring-like fastening portion 70 generates a restoring force in the reverse rotation direction (counterclockwise), which is opposite to the forward rotation direction (clockwise), by rotating its middle portion 70c from the initial position shown in Figure 13 toward the inside of the engagement portion 12 to an angle position (approximately 180° from the initial position in this embodiment) where the direction of the restoring force is reversed (see Figure 14).

[0033] Therefore, the fastening portion 70 is maintained in the aforementioned angular position in which it is inverted from its initial position toward the inside of the engagement portion 12, and when removing the suspension line protection cover 1, simply by rotating the fastening portion 70 from its initial position to the aforementioned inverted angular position, the fastening portion 70 remains stopped in that position and enters a stable state where it does not rotate, making it extremely easy to release the engagement between the half bodies 10, 10 and remove the suspension line protection cover 1.

[0034] The shape of the spring-like fastening part is not limited to that of the present embodiment, and any fastening part that uses torsional torque may be used. For example, a double torsion spring may also be used (not shown).

[0035] Next, the structural features of the half body 10 excluding the fixing means in the suspension wire protection cover 1 of this embodiment will be described with reference to FIG.

[0036] The pair of half bodies 10, 10 constituting the suspension wire protection cover 1 have overlapping portions along the axial direction of the hollow semi-cylindrical portion 13, which extend from the inner surface of the flange 11 to the midpoint as shown in the front view of Figure 15(b) and the left side arrow view of Figure 15(c), and these portions form convex strips 131a, 131b.

[0037] 15(a) and 15(c) show a plan view and a left side view, respectively. The flange 11 has recesses 132a and 132b formed from recesses that accommodate and slide the aforementioned protrusions 131a and 131b from the middle to the tip. This allows the half bodies 10 to engage with each other while sliding, with the protrusions 131a and 131b and the recesses 132a and 132b meshing with each other.

[0038] In this way, the pair of half bodies 10, 10 that make up the suspension wire protection cover 1 are a combination of identical parts with the same shape, so there is no need to check the combination of the pair of half bodies, making it easy to work in dark or high places.

[0039] In addition, the inner surface 123 of the engaging portion 12 in the half-split body 10 may have a chamfered shape as shown in Figure 15(b), or may have a linear shape like the inner surface 124 of the engaging portion 12 in a half-split body 10 of a different shape as shown in Figure 16(b).

[0040] As described above, the present invention has made it possible to easily attach and detach the suspension wire protective cover even in dark places and at high altitudes while preventing falling objects, thereby greatly reducing the burden on the worker. [Explanation of symbols]

[0041] 1 Hanging wire protective cover, 10 Half body, 11 Flange, 12 Engagement portion, 13 Half cylindrical portion, 70, 80 Fastening portion, 70a, 70b, 80a, 80b End portion, 70c, 80c Middle portion, 110 Notch portion, 111, 112 Bulging portion, 113 Guide surface, 121a, 121b Mounting hole, 122 Stopper, 123, 124 Inner surface, 131a, 131b Convex strip, 132a, 132b Concave strip

Claims

1. The hollow semi-cylindrical portion is divided into two along the axial direction, and the half body has a flange at one end and an engaging portion protruding in the centrifugal direction at the other end, and a fixing means. A suspension wire protective cover is attached to a suspension wire by sandwiching a suspension wire between a pair of half bodies, bringing them into close contact with each other and sliding them in the axial direction, and inserting and engaging the engaging portions into notches formed in the flanges to form a single spool-like member, and fixing the engaged state with the fixing means, The fixing means is a springy fastening portion, and both ends are pivotally supported by the engaging portion so that the horizontally facing middle portion can rotate on the outer surface side of the engaging portion, and is provided in a state where it can be restored to its initial position by a restoring force in the forward rotation direction generated when the middle portion is lifted in the centrifugal direction, A bulge portion protruding from the outer end surface of the flange is formed on each of the left and right sides of the cutout portion, and as the half bodies slide together when engaging each other, the middle portion of the fastening portion slides up in the centrifugal direction while sliding on guide surfaces formed on the inner surfaces of both of the bulge portions, and when it passes the top of the guide surfaces it descends due to the restoring force and stops on the outer surfaces of both of the bulge portions, thereby fixing the engaged state.

2. The suspension wire protection cover described in claim 1, characterized in that the fastening portion is a part formed by bending both ends of a springy member sideways into an approximately C-shape so that they face each other, and by providing a difference in axial height between the both ends, a twist is formed between the both ends with the middle portion as an axis, and the tips of the both ends are respectively inserted into mounting holes formed on the left and right side surfaces of the engaging portion, and when the middle portion rotates, the spring elasticity generates the restoring force.

3. The suspension wire protection cover of claim 2, characterized in that the fastening portion maintains the angular position reversed from the initial position due to a restoring force in the reverse rotation direction that is generated when the intermediate portion is rotated from the initial position toward the inside of the engagement portion to a predetermined angular position at which the direction of the restoring force is reversed.

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