Overhead power line metal fitting for electric car track and method for mounting overhead power line metal fitting for electric car track

Abstract

To solve such a problem that there is possibility that vibration fatigue and loosening of a screw body due to vibration occur when an overhead power line for an electric car track oscillates and so on in an overhead power line metal fitting for an electric car tract that pinches the overhead power line for an electric car track by fastening the screw body.SOLUTION: An overhead power line metal fitting comprises: a first pinching body 2 having a first pinching part 2a and a storage part 5; and a second pinching body 3 having a second pinching part 3a, a fit-in part 6 which has an insertion hole 3c in which a male screw part 30b can be inserted and which can be accommodated in the storage part 5, and a second female screw part 11 in which a first spiral strip 12 that is coaxial with the insertion hole 3c and can engage with a first spiral groove 31 is formed. By spirally rotating the male screw part 30b and the first female screw part 11 relatively, the fit-in part 6 can be advanced and retreated in the storage part 5.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to an overhead contact wire fitting for an electric rail track and a method for attaching the overhead contact wire fitting for an electric rail track. [Background technology]

[0002] Conventionally, screw-type ears used in hanger ears for electric train lines, curved pull fittings, connector fittings, etc., are composed of a pair of ear pieces and a bolt that penetrates the ear pieces and fastens the ear pieces in a closing direction. For example, Patent Document 1 discloses a hanger ear for electric railroad tracks that is provided with a tightening bolt that passes through a pair of ear pieces and tightens the space between the two ear pieces so as to be freely opened and closed. Patent Document 2 discloses a curved pull fitting for electric railroad tracks that is provided with a tightening bolt that passes through a pair of ear pieces and tightens the space between the two ear pieces so as to be freely opened and closed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5371108 [Patent Document 2] Actual publication Showa 59-69025 Summary of the Invention [Problem to be solved by the invention]

[0004] In an overhead contact metal fitting for a train line that clamps an overhead contact wire by tightening a threaded body, if the overhead contact wire vibrates, there is a risk of vibration fatigue due to shear force between the ear pieces or the threaded body becoming loose due to the vibration. For example, when the overhead contact wire is clamped, the overhead contact wire also vibrates in accordance with the vibration of the overhead contact wire when a train passes by. Therefore, measures are required for overhead contact metal fittings for train tracks to prevent vibration fatigue caused by shear force between the ear pieces and bolt loosening caused by vibration.

[0005] As a second issue, the curved pull fitting disclosed in Patent Document 2 (see Figures 5 to 7) has a large number of parts that make up the curved pull fitting, and the complexity of the structure means that the construction work required for replacing contact wires, etc. is high. Here, the procedure for clamping the trolley wire T in the conventional curved pulley is shown with reference to Figure 37(B). The main components of the conventional curved pulley 900 are the ear 2400, which is composed of ear pieces (2402, 2403), bolts (2410, 2440), and a ring (2430). First, to connect the ear mounting metal fitting 950 to the ear 2400, the ears 2402 and 2403 are fastened with the bolts 2410 to clamp the trolley wire T (FIG. 37(B)(st1)(st2)), and then the ear mounting metal fitting 950 and the ears (2402, 2403) are fastened with the ring 2430 and the bolts 2440 (FIG. 37(B)(st3) to (st6)). Therefore, the bolt fastening work is required at least two times. Furthermore, the ear pieces (2402, 2403) constituting the ear 2400 must be inserted upward from below the annular member 951, and in terms of work, it is necessary to hold the ear pieces (2402, 2403) inserted from below with one hand while using the other hand to screw the ring (2430) onto the upper part of the main body protruding from above the annular member 951, making the work complicated and requiring the use of both hands. [Means for solving the problem]

[0006] The present invention, which aims to solve the above-mentioned problems, provides an overhead line fitting for use with an electric rail line, which is positioned between a pair of clamping parts consisting of a first clamping part and a second clamping part and which clamps an electric rail line for use with an electric rail line, the overhead line fitting comprising: a first clamping body having a male threaded portion formed with a first helical groove set with an appropriate lead angle and / or lead direction, the first clamping body having the first clamping part and a accommodating part, and a second clamping body having the second clamping part, an insertion part having an insertion hole into which the male screw can be inserted and which can be accommodated in the accommodating part, and a first female threaded part formed with a first helical thread which is coaxial with the insertion hole and can be screwed into the first helical groove, the insertion part being configured so that the male threaded part and the first female threaded part are screwed relative to each other to move the insertion part forward and backward within the accommodating part.

[0007] Further, in order to solve the above-mentioned problems, the present invention provides an overhead line fitting for use with an electric rail line, which is positioned between a pair of clamping parts consisting of a first clamping part and a second clamping part and which clamps an electric rail line for use with an electric rail line, the overhead line fitting comprising: a male-threaded body having a male-threaded part formed with a first helical groove set with an appropriate lead angle and / or lead direction; the first clamping part, a first clamping body having an insertion hole into which the male-threaded part can be inserted and having an insertion part that can be accommodated in a accommodating part formed in the second clamping body; and a second clamping body having the second clamping part and a first female-threaded part formed with an accommodating part and formed with a first helical thread that can be screwed into the insertion hole coaxially with the insertion hole; and wherein the male-threaded part and the first female-threaded part are screwed relative to each other so that the insertion part can be advanced and retracted within the accommodating part.

[0008] The electric rail overhead line fitting of the present invention further comprises a female-threaded body that can be screwed into the male-threaded body, and the male-threaded portion of the male-threaded body has the first helical groove formed therein, and a second helical groove set to a lead angle and / or lead direction different from that of the first helical groove formed in the male-threaded portion so as to overlap with the first helical groove in the same region on the outer circumferential surface of the shaft portion, and the first female-threaded portion has a first helical rib formed therein that can be screwed into one of the first helical groove or the second helical groove of the male-threaded body, and the female-threaded body has a second female-threaded portion formed with a second helical rib that can be screwed into the other of the first helical groove or the second helical groove of the male-threaded body, and when the insertion portion is accommodated in the accommodation portion, the first female-threaded portion and the second female-threaded portion are each screwed into the male-threaded portion of the male-threaded body.

[0009] Moreover, in the electric rail overhead line fitting of the present invention, the female threaded body is a plate-like member having a through hole, the second female threaded portion of the female threaded body is composed of one or more plate pieces arranged to protrude from the through hole toward an axis of the second female threaded portion, and a tip of the plate piece forms the second helical rib having an intermittent or continuous spiral shape, and the second helical rib formed by the tip of the plate piece has a finite inclination angle with respect to a lead angle of the first helical rib of the first female threaded portion formed in the insertion hole of the second clamping body.

[0010] Moreover, in the overhead contact line metal fitting of the present invention, the second clamping body has a guide portion that detachably guides the female-threaded body, and the first female-threaded portion and the second female-threaded portion of the female-threaded body can be screwed into the male-threaded portion of the male-threaded body, respectively, in a state where the female-threaded body is guided by the guide portion.

[0011] Further, in order to solve the above-mentioned problems, the present invention provides a metal fitting for an electric train line that is positioned between a pair of clamping parts consisting of a first clamping part and a second clamping part and clamps an electric train line for use in a train line, the metal fitting comprising: an externally-threaded body having an external thread portion formed by a first helical groove set at an appropriate lead angle and / or lead direction and a second helical groove set at a lead angle and / or lead direction different from that of the first helical groove, the first helical groove being overlapped within the same region on the outer circumferential surface of a shaft part; an internally-threaded body capable of screwing into the externally-threaded body; a first clamping body having the first clamping part and an insertion hole into which the externally-threaded part can be inserted; and a second clamping body having a guide portion for mounting the female-threaded body, wherein the insertion hole of the second clamping body has a first female-threaded portion formed with a first helical rib that can be screwed into one of the first helical groove or the second helical groove of the male-threaded body, and the female-threaded body has a second female-threaded portion formed with a second helical rib that can be screwed into the other of the first helical groove or the second helical groove of the male-threaded body, and when the female-threaded body is mounted on the guide portion, the male-threaded portion and the first female-threaded portion are screwed relative to each other, thereby causing the first female-threaded portion and the second female-threaded portion to each be screwed into the male-threaded portion of the male-threaded body.

[0012] In the overhead contact wire fitting of the present invention, the second clamping body further has an engaging portion that engages with the female-threaded body in a state where the female-threaded body is guided by the guide portion.

[0013] Further, the present invention for solving the above-mentioned problem provides a metal fitting for an electric rail line that is positioned between a pair of clamping parts consisting of a first clamping part and a second clamping part and clamps an electric rail line, the metal fitting comprising: a male-threaded body having a male-threaded part formed with a first helical groove set with an appropriate lead angle and / or lead direction; a first clamping body comprising the first clamping part and a first main body part having a receiving part and having an insertion hole into which the male-threaded part can be inserted; and a second clamping body comprising the second clamping part and a second main body part having an insertion part that can be received in the receiving part and having an insertion hole into which the male-threaded part can be inserted, the first clamping body being composed of a first member and a second member. the first member has the accommodating portion formed on one end surface side and a receiving portion formed on the other end surface side, the second member has a recess formed in which the receiving portion fits, and a first female thread portion is formed in an insertion hole of the second main body portion of the second clamping body and formed with a first helical thread that is coaxial with the insertion hole and can be screwed into the first helical groove, and the insertion portion of the second clamping body is configured such that, when the second clamping body is accommodated in the accommodating portion of the first clamping body formed by engaging the first member with the second member, the male thread portion and the first female thread portion are screwed relative to each other to move the insertion portion back and forth within the accommodating portion.

[0014] Further, the present invention for solving the above-mentioned problem is a metal fitting for an electric rail line that is positioned between a pair of clamping parts consisting of a first clamping part and a second clamping part and clamps an electric rail line, the metal fitting comprising: a male-threaded body having a male-threaded part formed with a first helical groove set with an appropriate lead angle and / or lead direction; a first clamping body having the first clamping part and a first main body part having an insertion part that can be received in a receiving part formed in the second clamping body and having an insertion hole into which the male-threaded part can be inserted; and a second clamping body including the second clamping part and a second main body part having a receiving part that can receive the insertion part and having an insertion hole into which the male-threaded part can be inserted, the first clamping body being the first member has an insertion portion formed on one end surface side and a receiving portion formed on the other end surface side, the second member has a recess formed therein that fits with the receiving portion, and the second body portion of the second clamping body has a first female thread portion formed with a first helical thread that is coaxial with the insertion hole and can screw into the first helical groove, the insertion portion of the first clamping body is configured such that, when the first member and the second member are fitted together and the first clamping body is accommodated in the accommodation portion of the second clamping body, the male thread portion and the first female thread portion are screwed relative to each other to move the insertion portion back and forth within the accommodation portion.

[0015] Further, in order to solve the above-mentioned problems, the present invention provides a metal fitting for an electric rail line that is positioned between a pair of clamping parts consisting of a first clamping part and a second clamping part and clamps an electric rail line, the metal fitting comprising: a male-threaded body having a male-threaded part formed with a first helical groove set with an appropriate lead angle and / or lead direction; a first clamping part having a first main body part having an insertion part that can be received in a receiving part formed in the second clamping part and has an insertion hole into which the male-threaded part can be inserted; and a second clamping body including the second clamping portion and a second main body portion having a housing portion capable of housing the insertion portion, the second main body portion having an insertion hole into which the male threaded portion can be inserted, the first clamping body being composed of a first member and a second member, the first member having the insertion portion formed on one end surface side and a receiving portion formed on the other end surface side, the second member having a recess formed to fit with the receiving portion, and a first female threaded portion formed in the insertion hole of the second main body portion of the second clamping body and having a first helical thread that is coaxial with the insertion hole and can screw into the first helical groove, the insertion portion of the first clamping body being configured such that the male threaded portion and the first female threaded portion are screwed relative to each other in a state in which the first member and the second member are fitted together and the first clamping body is housed in the housing portion of the second clamping body, thereby allowing the insertion portion to be advanced and retreated within the housing portion.

[0016] Furthermore, in the overhead line metal fitting for train tracks of the present invention, the first member has a substantially cylindrical connecting portion at one end of the first main body portion which connects to the annular member, and a first clamping portion at the other end, and the connecting portion is composed of a small diameter portion having an outer diameter slightly smaller than the inner diameter of the annular member, and a large diameter portion having an outer diameter larger than the inner diameter of the annular member, and when the annular member is present at the connecting portion, when the first member and the second member are fitted together and / or when the first member and the second clamping body are combined, the annular member is prevented from coming off the small diameter portion.

[0017] In the overhead contact wire fitting of the present invention, the connection portion has a hollow portion therein that opens from an upper end side of the large diameter portion and has a bottom surface at a lower end side.

[0018] In the overhead contact metal fitting of the present invention, the connecting portion has a drain hole in a bottom surface of the hollow portion, the drain hole being smaller than the opening formed on the upper end side.

[0019] The present invention for solving the above-mentioned problem provides a method for mounting an overhead contact line fitting for use in an electric train line, the method comprising the steps of: mounting the overhead contact line fitting for use in an electric train line to a mounting fitting for a curved pull fitting, the method comprising the steps of: a first clamping body including a male-threaded body having a male-threaded portion, an insertion hole into which the male-threaded portion can be inserted, a first member having a receiving portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second member having a recess formed therein into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female-threaded portion capable of being screwed into the male-threaded portion, the second clamping body having an insert portion capable of being received in the receiving portion, the first member being inserted into the mounting fitting for a curved pull fitting, a step of inserting the first member into an annular member of a metal fitting; a step of accommodating the insertion portion in the accommodating portion and fitting the second member to the first member, with the large diameter portion of the first member being at one end of the annular member and the accommodating portion of the first member being at the other end of the annular member sandwiched between the first member and the large diameter portion of the first member; and a step of inserting the male threaded body from the first clamping body side and threading the male threaded portion and the female threaded portion relative to each other to move the insertion portion back and forth within the accommodating portion, thereby attaching the overhead line fitting for a train line.

[0020] The present invention for solving the above-mentioned problem provides a method for mounting an overhead contact line fitting for use in a train track, the method comprising the steps of: mounting the overhead contact line fitting for use in a train track on a fitting for a curved pull fitting, the method comprising the steps of: a first clamping body including a male-threaded body having a male-threaded portion, an insertion hole into which the male-threaded portion can be inserted, a first member having an insertion portion formed on one end face side and a receiving portion formed on the other end face side, and a second member having a recess formed therein into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female-threaded portion capable of being screwed into the male-threaded portion, the second clamping body having a receiving portion capable of receiving the insertion portion, the first clamping body including a male-threaded body having a male-threaded portion and an insertion hole into which the male-threaded portion can be inserted, the first clamping body including a second clamping body having a receiving portion formed therein and a receiving portion formed a step of inserting the first member into an annular member of an attachment fitting, the step of inserting the second member into the first member while the large diameter portion of the first member is at one end of the annular member and the insertion portion of the first member is at the other end of the annular member, the step of accommodating the insertion portion and fitting the second member into the first member; and a step of inserting the male threaded body from the first clamping body side and threading the male threaded portion and the female threaded portion relative to each other to move the insertion portion back and forth within the accommodating portion, thereby attaching the overhead line fitting for an electric train line.

[0021] The present invention for solving the above-mentioned problem provides a method for mounting an overhead line metal fitting for use in an electric train line, the method comprising the steps of: mounting the overhead line metal fitting for use in an electric train line, the overhead line metal fitting comprising: a first clamping body having a male threaded body having a male threaded portion, an insertion hole into which the male threaded portion can be inserted, the first clamping body being made up of a first member having a receiving portion formed on one end face side and a receiving portion formed on the other end face side, and a second clamping body having an insertion hole formed therein with a female threaded portion capable of being screwed into the male threaded portion, and an insert portion that can be received in the receiving portion, to a mounting metal fitting for a curved pull fitting, the method comprising the steps of: inserting the first member into an annular member of the mounting metal fitting; and a step of clamping the overhead line metal fitting for the electric rail line between the first clamping portion and the second clamping portion, with the large diameter portion of the first member being at one end of the annular member and the accommodating portion of the first member being at the other end of the annular member, accommodating the insertion portion in the accommodating portion and fitting the second member into the first member. The step of inserting the male threaded body from the first clamping portion side and screwing the male threaded portion and the female threaded portion relative to each other to move the insertion portion back and forth within the accommodating portion, thereby attaching the overhead line metal fitting for the electric rail line.

[0022] The present invention for solving the above-mentioned problem provides a method for attaching an overhead line metal fitting for use in an electric train line, the method comprising: a first clamping body including a male-threaded body having a male-threaded portion, an insertion hole into which the male-threaded portion can be inserted, a first member having an insertion portion formed on one end face side and a receiving portion formed on the other end face side, and a second member having a recess formed therein into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female-threaded portion capable of threadingly engaging with the male-threaded portion, and having a receiving portion capable of receiving the insertion portion, to a mounting bracket for a curved pull bracket, the method comprising the steps of: inserting the first member into an annular member of the mounting bracket; the receiving portion of the second clamping body receives the insertion portion and fits the second member into the first member, thereby clamping the electric rail overhead line between the first clamping portion and the second clamping portion, with the large diameter portion of the first member being at one end of the annular member and the insertion portion of the first member being at the other end of the annular member sandwiched between the first clamping portion and the second clamping portion; and the insert portion of the first member is inserted into the receiving portion of the second clamping body. The insert portion of the first member is inserted into the receiving portion of the second clamping body, and the insert portion of the first member is inserted into the receiving portion of the second clamping body.

[0023] Further, in order to solve the above-mentioned problems, the present invention provides a contactor for a railway comprising: a male-threaded body having a male-threaded portion; a first clamping body including a first member having an insertion hole into which the male-threaded portion can be inserted, the first member having a receiving portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second member having a recess formed therein into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female-threaded portion capable of being screwed into the male-threaded portion, the second member having an inserting portion capable of being received in the receiving portion, the first member having a substantially cylindrical connecting portion connected to an annular member, the connecting portion being configured to include a small-diameter portion having an outer diameter slightly smaller than the inner diameter of the annular member, and a large-diameter portion having an outer diameter larger than the inner diameter of the annular member. This method for attaching an overhead line fitting to a mounting fitting for a curved pull fitting comprises the steps of: inserting the first member from above the annular member until the large diameter surface of the first member comes into contact with an upper end surface of the annular member; accommodating the insertion portion of the second clamping body in the accommodating portion of the first member and fitting the second member with the first member; and inserting the male threaded body from the first clamping body side and threading the male threaded portion and the female threaded portion relative to each other to move the insertion portion forward and backward within the accommodating portion, thereby attaching the overhead line fitting for the electric rail.

[0024] Further, in order to solve the above-mentioned problems, the present invention provides a first clamping body including a male-threaded body having a male-threaded portion, an insertion hole into which the male-threaded portion can be inserted, a first member having an insertion portion formed on one end face side and a receiving portion formed on the other end face side, and a second member having a recess formed therein to fit with the receiving portion, and a second clamping body having an insertion hole formed therein with a female-threaded portion capable of screwing with the male-threaded portion, and having a receiving portion capable of receiving the insertion portion, the first member having a substantially cylindrical connecting portion connected to an annular member, the connecting portion being configured to have a small diameter portion having an outer diameter slightly smaller than the inner diameter of the annular member, and a large diameter portion having an outer diameter larger than the inner diameter of the annular member. This method for attaching an overhead line fitting to a mounting fitting for a curved pull fitting comprises the steps of: inserting the first member from above the annular member until the large diameter surface of the first member comes into contact with an upper end surface of the annular member; accommodating the insertion portion of the first member into the second clamping body and fitting the second member into the first member; and inserting the male threaded body from the first clamping body side and threading the male threaded portion and the female threaded portion relative to each other to move the insertion portion forward and backward within the accommodating portion, thereby attaching the overhead line fitting for the electric rail. Effect of the Invention

[0025] The overhead contact metal fitting for use in an electric rail line of the present invention increases rigidity against shear forces that may occur between the first clamping body and the second clamping body that constitute the overhead contact metal fitting for use in an electric rail line, and makes it possible to prevent bolts from loosening due to vibration. The overhead contact line fittings for train tracks according to the second aspect of the present invention make it possible to improve workability by reducing the number of bolt tightening operations and the like during work such as replacing contact wires, and by eliminating the cumbersome work that requires the use of both hands as required by conventional products. [Brief description of the drawings]

[0026] [Figure 1] FIG. 2 is a perspective view of the electric rail track overhead line fitting according to the first embodiment, as viewed from a second clamping body side. [Diagram 2]FIG. 2 is a perspective view of the electric rail track overhead line fitting according to the first embodiment, as viewed from a first clamping body side. [Diagram 3] 1A is a front view, FIG. 1B is a side view, FIG. 1C is a rear view, FIG. 1D is a top view, and FIG. [Figure 4] 1A is a front view, FIG. 1B is a side view, FIG. 1C is a rear view, FIG. 1D is a top view, and FIG. [Diagram 5] FIG. 2 is a front view showing the male-threaded body according to the first embodiment. [Figure 6] 5A and 5B are cross-sectional views taken along the line AA of a first clamping body shown in FIG. 3A, a second clamping body shown in FIG. 4A, and a male-threaded body shown in FIG. 5, which constitute the overhead line metal fitting for electric rail connected to one end of a hanger bar according to the first embodiment, where (A) is an exploded view and (B) is an assembled view. [Figure 7] FIG. 4 is a front sectional view of an overhead contact wire fitting for an electric rail track according to a modified example of the first embodiment. [Figure 8] FIG. 11 is a perspective view of the electric rail line fitting according to the second embodiment, as viewed from the second clamping body side. [Figure 9] 13A is a front view showing a male-threaded body according to a second embodiment, and FIG. 13B is a plan view showing the male-threaded portion in both spiral groove regions. [Figure 10] FIG. 11 is a front cross-sectional view of a modified example of the fastening structure of the male and female threaded portions of the second embodiment. [Figure 11] 11A, 11B, 11C, 11D, and 11E are a front view, a side view, a rear view, a top view, and a bottom view, respectively, showing a second clamping body according to a second embodiment. [Figure 12] 1A is a front view, FIG. 1B is a rear view, FIG. 1C is a side view, and FIG. 1D is a cross-sectional view taken along the line AA in FIG. [Figure 13] 13A and 13B are a side view and a rear view showing an internally-threaded body and a second clamping body according to a modified example of the second embodiment. [Figure 14] 13 is a cross-sectional view of an overhead contact wire fitting for an electric railroad track connected to one end of a hanger bar according to a second embodiment, and an enlarged cross-sectional view of a female-threaded body. FIG. [Figure 15]FIG. 1A is a partial cross-sectional view showing a state in which a right-handed female-threaded body is screwed into an overlapping region of a male-threaded body having right-handed and left-handed threads, and FIG. 1B is a partial cross-sectional view showing a cross-section perpendicular to the cross-section of FIG. 1A. [Figure 16] 1A is a partial cross-sectional view showing a state in which a rotational force is applied to a right-handed female-threaded body to rotate it, and FIG. 1B is another partial cross-sectional view of FIG. [Figure 17] FIG. 4 is a front cross-sectional view of a first female threaded portion. [Figure 18] 13 shows a clamping body according to a third embodiment, in which (A) is a front view of a first clamping body, (B) a rear view of the first clamping body, (C) a front view of a second clamping body, and (D) a rear view of the second clamping body. [Figure 19] 13 shows a clamping body according to a modified example of the third embodiment, in which (A) is a front view of a first clamping body, (B) is a rear view of the first clamping body, (C) is a front view of a second clamping body, and (D) is a rear view of the second clamping body. [Figure 20] 13A and 13B are perspective views of a trolley line fitting according to a fourth embodiment, as viewed from a second clamping body side, in which (A) is an exploded view and (B) is an assembled view. [Figure 21] 13A, 13B, 13C, and 13D are a front view, a rear view, a top view, and a bottom view, respectively, showing a first member of a first clamping body according to a fourth embodiment. [Figure 22] 21(A) is a cross-sectional view taken along the line AA in FIG. 21(A), and (B) is a cross-sectional view taken along the line BB in FIG. 21(A). [Figure 23] 13A is a front view showing a second member of a first clamping body according to a fourth embodiment, FIG. 13B is a rear view, FIG. 13C is a top view, and FIG. 13D is a cross-sectional view taken along the line AA in FIG. [Figure 24] 13A, 13B, 13C, and 13D are a front view, a side view, a top view, and a rear view, respectively, showing a second clamping body according to a fourth embodiment. [Diagram 25] 25 is a cross-sectional view taken along the line AA in FIG. 24(A). [Figure 26] FIG. 11 is a cross-sectional view of an overhead contact metal fitting for an electric rail track according to a fourth embodiment. [Figure 27] 13(A), (B), and (C) are diagrams illustrating a procedure for attaching an overhead contact line fitting and a curved pull fitting according to a fourth embodiment. [Figure 28] FIG. 13 is a front view showing an overhead contact metal fitting for an electric rail line according to a modified example of the fourth embodiment. [Figure 29] FIG. 13A is a front view showing an overhead contact wire and a trolley wire relating to a fifth embodiment, (B) is a schematic diagram showing the contact between the trolley wire and a pantograph in a section where a cant is not provided, and (C) is a schematic diagram showing the contact between the trolley wire and a pantograph in a section where a cant is provided. [Diagram 30] FIG. 1 is a front view of a hanger, which is one of the applications of the present invention. [Diagram 31] FIG. 11 is a front view of a connector fitting according to a third embodiment, which is one of applications of the present invention. [Diagram 32] FIG. 13A is a front view of a curved pull fitting according to a fourth and fifth embodiment, which is one of the applications of the present invention. [Diagram 33] FIG. 13 is a perspective exploded view of a railroad track overhead wire fitting according to a modified example of the third embodiment, as viewed from a second clamping body side. [Diagram 34] 13A, 13B, and 13C are front, side, and rear views, respectively, showing a railroad track overhead wire fitting according to a modified example of the third embodiment. [Diagram 35] FIG. 13 is a perspective view showing an overhead contact metal fitting for an electric rail line according to a modified example of the fourth embodiment. [Diagram 36] 13A and 13B are cross-sectional views taken along the line axis of an overhead contact wire fitting for an electric rail track according to a modified example of the fourth embodiment. [Figure 37] FIG. 13 shows the procedure for attaching the arm member and overhead line of the curved pulley to the overhead line fitting for an electric rail, where (A) shows the procedure for attaching the overhead line fitting for an electric rail in accordance with the fourth embodiment, and (B) shows the procedure for attaching a conventional overhead line fitting for an electric rail. [Figure 38] FIG. 13 shows the procedure for attaching the arm member of the curved pulley to the overhead contact line fitting, where (A) shows the procedure for attaching the overhead contact line fitting for the fourth embodiment, and (B) shows the procedure for attaching it to a conventional overhead contact line fitting. [Figure 39]FIG. 13 shows procedures for re-laying overhead lines when a curved pull fitting is used, where (A) shows the procedure for re-laying overhead lines in the overhead line fitting for an electric train line according to the fourth embodiment, and (B) shows the procedure for re-laying overhead lines in a conventional overhead line fitting for an electric train line. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] An overhead contact wire fitting 1 for use in an electric rail track according to a first embodiment of the present invention will now be described with reference to the drawings, with reference to Fig. 1 to Fig. 6. The overhead contact wire fitting 1 for use in an electric rail track is a fitting for supporting an overhead contact wire for use in an electric rail track, and can be used for curved pull fittings, anti-vibration fittings, suspension fittings, power feed fittings, connection fittings, dead-end fittings, wire clips, wire turnbuckles, etc. Here, the concept of overhead lines for electric train tracks includes overhead wires (electric train lines and contact wires) and feeder lines that constitute the overhead electric train lines and feeder lines in ordinary railways and tracks, as well as suspension wires for supporting the electric wires. The dimensions, materials, shapes, and relative arrangements of the components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present invention to the above-mentioned contents. For example, expressions expressing a relative or unambiguous arrangement such as "in a certain direction," "along a certain direction," "toward a certain direction," "parallel," "orthogonal," "vertical," "center," "concentric," or "coaxial" not only strictly express such an arrangement, but also express a state in which the objects are relatively displaced with an angle and distance to the extent that the same function is obtained. For example, expressions expressing that things are in an equal state such as "same," "equal," "uniform," and "equal density" not only strictly express a state in which the objects are in an equal state, but also express a state in which there is a tolerance, or a difference or ratio to the extent that the same function is obtained. For example, expressions expressing shapes such as a triangular pyramid, a cone, a triangular prism, and a cylinder not only express shapes such as a triangular pyramid, a cone, a triangular prism, and a cylinder in the strict geometric sense, but also express shapes including uneven parts, chamfered parts, curved parts, R-shaped parts, etc., within the scope in which the same effect is obtained. On the other hand, the expressions "comprise," "formed by," "include," "have," "include," or "have" of one element are not exclusive expressions excluding the presence of other elements.

[0028] In addition, in the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional Cartesian coordinate system. In the XYZ coordinate system, for the sake of convenience, the X-axis direction is defined as a direction parallel to the axial direction of the male-threaded body 10 shown in FIG. 1. The Y-axis direction is defined as a direction perpendicular to the X-axis direction and is the extension direction of the trolley wire T in FIG. 1. The Z-axis direction is defined as a direction perpendicular to both the X-axis direction and the Y-axis direction. In addition, any direction in which the XY plane defined by the X-axis and Y-axis extends is referred to as the "horizontal direction."

[0029] In the following description, the Z-axis direction is the up-down direction, and the positive side (+Z side) of the Z-axis direction is the up-down direction. The X-axis direction is referred to as the "upper side (upper side in the Z-axis direction)" and the negative side (-Z side) in the Z-axis direction is referred to as the "lower side (lower side in the Z-axis direction)". The X-axis direction is referred to as the front-rear direction (length direction), the positive side (+X side) in the X-axis direction is referred to as the "front", and the negative side (-X side) in the X-axis direction is referred to as the "rear". The radial direction centered on the X-axis is referred to simply as the "radial direction", and the circumferential direction (θ direction) centered on the X-axis is referred to simply as the "circumferential direction". The Y-axis direction is referred to as the width direction. Note that the radial direction, circumferential direction, up-down direction, upper and lower sides, front-rear direction (length direction), front and rear, and width direction are names used simply for explanation and do not limit the actual positional relationship and direction.

[0030] In this specification, "extend" includes not only extending strictly in the axial direction but also extending in a direction tilted at an angle of 45° or less from the axial direction, and "extend in the radial direction" includes not only extending strictly in the radial direction, i.e., in a direction perpendicular to the X-axis direction, but also extending in a direction tilted at an angle of 45° or less from the radial direction.

[0031] The overhead contact wire fitting 1 of the first embodiment clamps the overhead contact wire CA for the electric rail line located between the first clamping portion 2a and the second clamping portion 3a by tightening the male threaded body 10. In this embodiment, the overhead contact line fitting 1 will be described as an overhead contact line fitting 1 applied to a hanger 700 shown in Fig. 30. Of course, the application of the overhead contact line fitting 1 is not limited to the hanger 700. Also, the overhead contact line CA will be described as a contact wire T, but the overhead contact line CA is not limited to the contact wire T. Details will be described below.

[0032] As shown in Figure 30, the hanger ear 700 is a metal fitting used to suspend a trolley wire T from a suspension wire M or the like, and is composed of a hook portion 720 for hanging the trolley wire T on the suspension wire M, a hanger bar 710 extending downward from the hook portion, and an ear 701 for clamping the trolley wire.

[0033] In this embodiment, the overhead contact wire fitting 1 can be used as an ear 701 of a hanger ear 700.

[0034] 1 and 2, the overhead contact metal fitting 1 for use with train tracks comprises a first clamping body 2, a second clamping body 3, and a male threaded body 10. As shown in Fig. 6, the overhead contact metal fitting 1 for use with train tracks comprises the first clamping body 2 having a housing portion 5 capable of housing the insertion portion 6 of the second clamping body 3, and is configured so that the insertion portion 6 can be advanced and retreated within the housing portion 5 by screwing the male threaded portion 30b of the male threaded body 10 and the first female threaded portion 11 of the second clamping body 3 relative to one another.

[0035] As shown in FIG. 3 and FIG. 6(A), the first clamping body 2 has, from the lower side (−Z side), a first clamping portion 2a, a main body portion 2b continuing therefrom above, and a connecting portion 4.

[0036] The first clamping portion 2a is disposed so as to face the second clamping portion 3a of the second clamping body 3 and clamp the trolley wire T (see FIG. 1). The first clamping portion 2a is formed along the lower end edge of the main body portion 2b so as to protrude toward the second clamping body 3. The first clamping portion 2a fits laterally into a groove portion M along the longitudinal direction of the circumferential surface of the trolley wire T.

[0037] As shown in FIG. 3(B), the main body portion 2b is formed in an upside-down inverted L shape. As shown in FIG. 3(A), the main body 2b has an insertion hole 2c formed in the X-axis direction at approximately the center of the long side (YZ plane) of the inverted L shape. 6, the male threaded body 10 is inserted into this insertion hole 2c from the rear (-X side) of the first clamping body 2. The hole diameter of the insertion hole 2c is formed to be smaller than the outer diameter of the head 20 of the male threaded body 10 and larger than the diameter of the shaft portion 30 on the entrance side where the male threaded body 10 is inserted. On the other hand, the hole diameter of the insertion hole 2c is enlarged on the outlet side of the male threaded body 10 inserted into the first holding body 2, and a hollow cylindrical receiving portion 5 is formed.

[0038] 6(A), the storage portion 5 has an inner peripheral wall portion 5b extending from a bottom surface 5a in the X-axis direction beyond the axis C of the connection portion 4. That is, a tip edge 5c of the inner peripheral wall portion 5b is formed at a position beyond the axis C of the connection portion 4 in the X-axis direction. The accommodation section 5 accommodates the insertion section 6 of the second clamping body 3. The accommodation section 5 does not need to accommodate the entirety of the insertion section 6, but only needs to be formed to accommodate at least a part of the insertion section 6, and configured so that the insertion section 6 can relatively advance and retreat within the accommodation section 5, and configured so that the insertion section 6 shares a part or all of the bending load and shear load acting on the male threaded body 10 with the insertion section 6 accommodated in the accommodation section 5 to a certain extent, thereby assisting and reinforcing the male threaded body 10 and suppressing a decrease in durability and fatigue degree of the male threaded body 10. By configuring it in this way, not only can a decrease in the yield strength of the male threaded body 10 be suppressed and the fatigue life extended, but also the durability of the overhead contact wire fitting 1 for train tracks can be improved and the fatigue life extended.

[0039] The tip edge 5c of the storage portion 5 does not necessarily have to be formed at a position beyond the axis C of the connection portion 4 in the X-axis direction. The position of the tip edge 5c of the storage portion 5 may be up to the position of the axis C, or may not reach the position of the axis C.

[0040] The body 2b has a groove 2d formed in the X-axis direction on the short side (XY plane) of the inverted L shape. The groove 2d is formed with a bottom so that the lower side (-Z side) from the short side is an open surface, as shown in Figs. 3(B) and (C). The wall 2e constituting the groove 2d abuts against a positioning portion 3d of the second clamping body 3, which will be described later, and positions the first clamping body 2 and the second clamping body 3. Furthermore, the groove portion 2d may be shaped like a so-called dovetail groove (a groove with a cross section that is approximately inverted U-shape) to prevent the positioning portion 3d from becoming separated in the vertical direction when inserted into the groove portion 2d.

[0041] This facilitates positioning of the first clamping body 2 and the second clamping body 3, for example, in the task of clamping an overhead wire CA for a train track such as a trolley wire T, and also prevents erroneous use of a part having a different shape of the positioning portion 3d. Furthermore, when fastened by the male thread body 10, not only is relative rotation between the first clamping body 2 and the second clamping body 3 prevented, but rattling between the first clamping body 2 and the second clamping body 3 is also prevented, and relative inclination is also prevented.

[0042] The connection portion 4 is fixed to one end of a hanger bar 710 shown in FIG. 30 by compression connection or the like. In this embodiment, the connection portion 4 is provided on the first clamping body 2, but this is not limiting. For example, the connection portion 4 may be provided on the second clamping body 3. In the present embodiment, the connection portion 4 is formed extending upward (+Z-axis) of the railroad track overhead wire fitting 1, but it may be formed extending in the X-axis and / or Y-axis directions.

[0043] As shown in FIG. 4 and FIG. 6(A), the second clamping body 3 has, from the lower side (−Z side), a second clamping portion 3a, a main body portion 3b continuing therefrom above, and a positioning portion 3d.

[0044] The second clamping portion 3a is disposed facing the first clamping portion 2a of the first clamping body 2 so as to clamp the trolley wire T (see FIG. 1). The second clamping portion 3a is formed along the lower edge of the main body portion 3b so as to protrude toward the first clamping body 2. The second clamping portion 3a fits laterally into a groove portion M along the longitudinal direction of the circumferential surface of the trolley wire T.

[0045] 1 and 6(B), in a state where the trolley wire T is clamped between the first clamping portion 2a and the second clamping portion 3a, the distance between the first clamping portion 2a and the second clamping portion 3a corresponding to the position of the groove portion M is defined as D. The bottom surface 5a of the accommodating portion 5 abuts against the tip edge 6c of the insertion portion 6, and / or the tip edge 5c of the accommodating portion 5 abuts against the main body portion 3b of the second clamping body 3, so that the minimum distance of this distance D is equal to or greater than the maximum compressed width of the groove portion M of the trolley wire T in the elastic region. The contact points are not limited to these points. That is, it is sufficient that the minimum distance D is not reduced any more by the contact between any point of the first clamping body 2 and any point of the second clamping body 3. In the above description, the distance between the first clamping portion 2a and the second clamping portion 3a is taken as D, taking the position of the groove M in the trolley wire T as an example. However, this is not limited to the distance between the first clamping portion 2a and the second clamping portion 3a corresponding to the position of the groove M. In other words, it is only necessary that the minimum distance between the first clamping portion 2a and the second clamping portion 3a at a specific position of the trolley wire T clamped by the first clamping portion 2a and the second clamping portion 3a is equal to or greater than the maximum compressed width in the elastic region of the material of the trolley wire T. As a result, the trolley wire T is clamped by a stress equal to or less than the yield strength, and therefore it is possible to increase the durability of the trolley wire T compared to a metal fitting for a train track that does not have this configuration. For example, even if an operator overtightens the male threaded body 10 when installing the overhead line fitting 1 for a train track, a clamping force is applied to the trolley wire T located between the first clamping portion 2a and the second clamping portion 3a while exerting a stress equal to or less than the yield strength.

[0046] As shown in FIG. 4(A), the main body portion 3b has, at approximately the center thereof, an insertion hole 3c into which the male threaded portion 30b of the male threaded body 10 can be inserted.

[0047] A hollow cylindrical insertion portion 6 extending in the X-axis direction toward the first clamping body 2 is connected to the insertion hole 3c. At least a portion of this insertion portion 6 can be accommodated in the accommodation portion 5 of the first clamping body 2 (see FIG. 6(B)). A first helical rib 12 constituting a first female thread portion 11 is formed on the inner peripheral wall portion 6b of the insertion hole 3c (see Fig. 6(A) and Fig. 17). The first helical rib 12 is screwed into a first helical groove 31 in the male thread portion 30b of the male-threaded body 10. In this embodiment, the first female thread portion 11 is formed with the first helical rib 12 which is a right-handed thread, but the first female thread portion 11 is not limited to a right-handed thread.

[0048] A tip edge 6c of the insertion portion 6 is formed toward the first holding body 2 at a position beyond the axis C of the connection portion 4 in the X-axis direction. It is sufficient that at least a portion of the insertion portion 6 is formed so that it can be accommodated in the accommodation portion 5, and that the insertion portion 6 is configured so that it can relatively advance and retreat within the accommodation portion 5. The tip edge 6c of the insertion portion 6 does not need to be formed at a position that exceeds the axis C of the connection portion 4 in the X-axis direction toward the first clamping body 2. The position of the tip edge 6c of the insertion portion 6 may be up to the position of the axis C, or it does not have to reach the position of the axis C.

[0049] The positioning portion 3d is in the form of a protrusion, and is formed so as to come into contact with the wall portion 2e of the groove portion 2d of the first clamping body 2. As described above, the positioning portion 3d comes into contact with the wall portion 2e constituting the groove portion 2d, and determines the positions of the first clamping body 2 and the second clamping body 3.

[0050] In this embodiment, the groove portion 2d is formed in the first clamping body 2, and the positioning portion 3d is formed in the second clamping body 3, but this is not limiting. For example, the positioning portion 3d may be formed in the first clamping body 2. Also, it is not necessarily required to provide the groove portion 2d and the positioning portion 3d in the trolley line fitting 1.

[0051] As shown in FIG. 5, the male-threaded body 10 has a head portion 20 and a shaft portion 30. The head 20 is provided at one end of the shaft portion 30, and has a larger outer diameter than the shaft portion 30. Of course, the outer diameter shape of the head 20 is not limited to this, and it may have an irregular recess recessed into the top surface of the head like a so-called cap bolt. A cylindrical portion 30a and a male thread portion 30b are provided on the shaft portion 30. The male thread portion 30b has a first spiral groove 31 formed on the outer circumferential surface of the shaft portion 30, the first spiral groove 31 being set to an appropriate lead angle and / or lead direction. In this embodiment, the male thread portion 30b is formed with the first helical groove 31 which is a right-handed thread, but the male thread portion 30b is not limited to a right-handed thread.

[0052] 1 and 6, when the male threaded body 10 is tightened, the first clamping body 2 and the second clamping body 3 clamp the trolley wire T. An elastic member 9 is interposed between the male threaded body 10 and the first clamping body 2. The elastic member 9 is an elastic body such as a coil spring, a disc spring, a leaf spring, an elastic resin member, or the like, and functions as a biasing part. The biasing portion biases the first clamping portion 2a and the second clamping portion 3a in a direction narrowing the gap between them. Also, the head 20 of the male-threaded body 10 is biased outward (in the −X direction). As a result, for example, when attempting to clamp a trolley wire T between the first clamping portion 2a and the second clamping portion 3a, the worker can widen the distance between the first clamping portion 2a and the second clamping portion 3a with one hand and position the trolley wire T between the two clamping portions (2a, 3a), and the trolley wire T can then be automatically clamped by the force of the elastic member 9. For example, when it is desired to remove the trolley wire T clamped between the first clamping portion 2a and the second clamping portion 3a, the worker first loosens the male threaded body 10 from the overhead contact wire fitting 1 to an extent that the trolley wire T can be removed. At this time, the trolley wire T is clamped between the first clamping portion 2a and the second clamping portion 3a by the biasing force of the elastic member 9. Next, the worker can remove the trolley wire T from both clamping portions (2a, 3a) simply by widening the gap between the first clamping portion 2a and the second clamping portion 3a with one hand. As described above, the overhead contact line fitting 1 can improve workability and construction efficiency compared to an overhead contact line fitting not having this configuration.

[0053] As described above, according to the train track overhead line fitting 1 of the first embodiment, the accommodating portion 5 of the first clamping body 2 has the accommodating portion 5 capable of accommodating the insertion portion 6 of the second clamping body 3, and is configured such that the insertion portion 6 can be advanced and retreated within the accommodating portion 6 by screwing the male threaded portion 30b of the male threaded body 10 and the first female threaded portion 11 of the second clamping body 3 relative to each other. As a result, when a shear force acts on the boundary surface between the first clamping body 2 and the second clamping body 3 that constitute the train track overhead line metal fitting 1, the shear force can be received by the outer circumferential surface of the insertion portion 6.

[0054] Furthermore, the first clamping body 2 having the receiving portion 5 and the second clamping body 3 having the insertion portion 6 are integrated, which makes it possible to increase the rigidity against shearing forces. For example, the diameter of the male threaded body 10 can be made smaller than that of a train track overhead line fitting not having this configuration.

[0055] Furthermore, the overhead contact metal fitting 1 for train tracks of the first embodiment prevents the male-threaded body 10 from loosening, compared to an overhead contact metal fitting for train tracks not having this configuration. This is because if the male-threaded body 10 continues to be loaded in the axial direction and its yield strength decreases, the axial force of the male-threaded body 10 decreases, and the male-threaded body 10 may loosen. The direction of force that causes the male-threaded body 10 to be loaded in the axial direction is not limited to the axial direction; for example, a force in the bending direction may also be a load. The overhead contact metal fitting 1 for train tracks of this embodiment increases rigidity against shear force and prevents a force in the bending direction from acting on the male-threaded body 10 and prevents the male-threaded body 10 from being loaded in the axial direction due to bending, thereby preventing the male-threaded body 10 from loosening.

[0056] Furthermore, even when the male threaded body 10 is removed from the overhead contact wire fitting 1 during work such as replacing the trolley wire T or other overhead contact wire CA, the insertion portion 6 of the second clamping body 3 remains housed in the housing portion 5 of the first clamping body 2. This makes it possible to prevent either the first clamping body 2 or the second clamping body 3 from falling, as compared to an overhead contact wire fitting not having this configuration.

[0057] [Modification of the first embodiment] FIG. 7 is a diagram showing an overhead contact fitting 1 for an electric rail line according to a modified example of the first embodiment.

[0058] The overhead contact wire fitting 1 for an electric rail track according to a modified example of this embodiment will be described below. 7, the overhead contact wire fitting 1 includes a first clamping body 2, a second clamping body 3, and a male threaded body 10. The overhead contact wire fitting 1 clamps the contact wire T located between the first clamping body 2 and the second clamping body 3 by tightening the male threaded body 10.

[0059] The third embodiment differs from the overhead contact wire fitting 1 of the first embodiment in that the first clamping body 2 has an insertion portion 16 and the second clamping body 3 has a housing portion 15. In the modification of this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.

[0060] The overhead contact wire fitting 1 of the modified example of this embodiment clamps the overhead contact wire CA located between a pair of clamping parts (2a, 3a) consisting of a first clamping part 2a and a second clamping part 3a. The male-threaded body 10 has a male-threaded part 30b in which a first helical groove 31 set with an appropriate lead angle and / or lead direction is formed. The first clamping body 2 has a first clamping portion 2a and an insertion hole 2c into which the male threaded portion 30b can be inserted, and has an insertion portion 16 that can be accommodated in the accommodation portion 15 of the second clamping body 3. The second clamping body 3 has a second clamping portion 3a and the accommodation portion 15. The second clamping body 3 further has a first female threaded portion 11 formed with a first helical thread 12 that is coaxial with the insertion hole 2c of the first clamping body 2 and can be screwed into the first helical groove 31. The trolley line fitting 1 can be configured so that the insertion portion 16 can be advanced and retreated within the accommodation portion 15 by screwing the male threaded portion 30b and the first female threaded portion 11 relative to each other.

[0061] As a result, when a shear force acts on the boundary surface between the first clamping body 2 and the second clamping body 3 constituting the overhead contact metal fitting 1, the shear force can be received by the outer circumferential surface of the insertion portion 16. Furthermore, the overhead contact metal fitting 1 for electric train tracks of this modification restricts the male-threaded body 10 from loosening, as compared with an overhead contact metal fitting for electric train tracks not having this configuration. This is because, if the male-threaded body 10 continues to be loaded in the axial direction and its yield strength decreases, the axial force of the male-threaded body 10 decreases, and the male-threaded body 10 may loosen. The direction of force that causes the male-threaded body 10 to be loaded in the axial direction may be other than the axial direction, and for example, a force in the bending direction may also be applied. The overhead contact metal fitting 1 for electric train tracks of this modification increases rigidity against shear force and restricts the male-threaded body 10 from being subjected to a force in the bending direction and from being loaded in the axial direction by bending, which ultimately restricts the male-threaded body 10 from loosening.

[0062] [Second embodiment] FIG. 8 is a perspective view showing an overhead contact metal fitting 100 for an electric rail track according to the second embodiment.

[0063] A description will now be given of an overhead contact line fitting 100 according to a second embodiment of the present invention. When an overhead contact line for an electric train line is subjected to vibration or the like, there is a risk that the threaded body may become loose. In contrast, the overhead contact line fitting 100 for an electric train line according to this embodiment can prevent the threaded body from becoming loose. As in the first embodiment, the overhead contact line fitting 100 will be described as the overhead contact line fitting 100 applied to a hanger 700 shown in Fig. 30. Of course, the application of the overhead contact line fitting 100 is not limited to hanger ears. Also, the overhead contact line CA will be described as a trolley wire T, but the overhead contact line CA is not limited to a trolley wire T. Details are explained below.

[0064] In this embodiment, the overhead contact wire fitting 100 can be used as the ear 701 of the hanger ear 700. As shown in FIG. 8, the railroad track overhead wire fitting 100 of the second embodiment includes a first clamping body 2, a second clamping body 3, an externally threaded body 110, and an internally threaded body 50. As shown in FIG. The overhead contact wire fitting 100 for train tracks clamps the trolley wire T located between the first clamping body 2 and the second clamping body 3 by tightening the male threaded body 110. Furthermore, the female threaded body 50 is used to prevent the male threaded body 110 from loosening.

[0065] The difference from the first embodiment is that the present embodiment uses a male-threaded body 110 having a right-handed thread 131a and a left-handed thread 131b formed overlapping in the same region on the outer peripheral surface of the shaft portion 130 of the male-threaded body 110 as shown in FIG. 9(A), and that the second clamping body 3 is provided with an female-threaded body 50 having a first female-threaded portion 11 formed in the insertion portion 6 of the second clamping body 3 as shown in FIGS. 11 and 12 that can be screwed into either the right-handed thread 131a or the left-handed thread 131b of the male-threaded body 110, and a second female-threaded portion 53 formed in the insertion portion 6 of the second clamping body 3 as shown in FIG. 12. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.

[0066] The male threaded body 110 will now be described. 9(A), the male threaded body 110 has a head 120 and a shank 130. The head 120 is provided at one end of the shank 130, and has a larger outer diameter than the shank 130. Of course, the outer diameter shape of the head 120 is not limited to this, and it may have an irregularly shaped recess recessed from the top surface of the head like a so-called cap bolt. The shaft portion 130 of the male threaded body 110 is provided with a cylindrical portion 130a and a male threaded portion 130b. In this embodiment, the male thread portion 130b has an overlap region W on the outer peripheral surface of the shaft portion 130, in which two types of male thread spiral grooves, a first spiral groove 133a which is a right-handed thread 131a and a second spiral groove 133b which is a left-handed thread 131b, are overlapped on the same region. Therefore, the male thread portion 130b can be screwed into either a right-handed or left-handed female thread body.

[0067] As shown in FIG. 9(B), in the male thread portion 130b, threads G each having a roughly crescent-shaped stripe shape extending circumferentially in a surface direction perpendicular to the axis (screw axis) C are alternately provided on one side (the right side of the figure) and the other side (the left side of the figure) in the diameter direction of the male thread portion 130b. That is, the ridge of this thread G extends perpendicularly to the axis, and the height of the thread G varies so that it is higher at the circumferential center and gradually decreases at both circumferential ends. Therefore, the height of the thread G is lower in a portion having a phase difference of 90° in the circumferential direction from the point where the thread height is the highest. In addition, the crest height is zero in the circumferentially 180° phase difference portion. By configuring the thread G in this manner, two types of helical grooves can be formed between the threads G: a virtual helical groove structure that turns clockwise and a virtual helical groove structure that turns counterclockwise.

[0068] Furthermore, the male thread portion 130b is not necessarily limited to forming right-handed and left-handed threads, but may have a first spiral groove 133a set at an appropriate lead angle and / or lead direction, and a second spiral groove 133b set at a lead angle and / or lead direction different from that of the first spiral groove 133a. For example, as shown in Fig. 10, a first spiral groove 133a and a first spiral rib 12, and a second spiral groove 133b and a second spiral rib 54, which have the same lead direction (L1, L2) but different lead angles, may be used. In this case, a spiral groove with a different lead angle is further superimposed on the first spiral groove 133a, so that the first spiral groove 133a with a lead of L1 (lead angle α1) and the second spiral groove 133b with a lead of L2 (lead angle α2) are formed with the same screw direction. In this case, the first thread G1 of the first spiral groove 133a and the second thread G2 of the second spiral groove 133b are not shared but are separate. For details of the male screw portion 130b in which the two types of male screw helical structures are formed, please refer to Japanese Patent No. 4663813 invented by the inventor of the present application.

[0069] The second clamping body 3 will be described. 11, an insertion portion 6 that can be accommodated in the accommodation portion 5 of the first clamping body 2 is formed on one side of the main body portion 3b of the second clamping body 3. In addition, a guide portion 7 that allows the female threaded body 50 to be attached and detached is formed on the other side of the main body portion 3b.

[0070] The guide portions 7 are formed so as to face both sides of an insertion hole 3c formed in the main body portion 3b of the second clamping body 3, as shown in FIG. 11(C). As shown in FIG. 11(D), the guide portion 7 has a recessed groove 7a having a generally U-shaped cross section so that the plate-shaped internally threaded body 50 can be sandwiched therein. 11(C), the groove 7a has an open opening 7b formed on its upper side (upper side in the Z-axis direction), and a stopper 7c formed on its lower side (lower side in the Z-axis direction). As a result, the female threaded body 50 is disposed at a predetermined position along the groove 7a from the open opening 7b.

[0071] In this manner, by using the guide portion 7, it becomes possible to attach and detach the female-threaded body 50 having the second female-threaded portion 53 to the second clamping body 3. That is, by making the second female-threaded portion 53 a separate body from the second clamping body 3, it becomes possible to reduce processing costs and to facilitate replacement when the female-threaded body 50 is damaged, for example. In addition, when replacing the trolley wire T, etc., by arranging the female threaded body 50 in the guide portion 7 in advance (at the time of shipping from the factory, etc.), work to prevent the male threaded body 110 from loosening (such as inserting a split pin) at the work site is not required. Furthermore, even if the female threaded body 50 is not previously arranged in the guide portion 7 prior to replacement of the trolley wire T or the like, the worker can insert it simply by sliding the female threaded body 50 from the upper side (upper side in the Z-axis direction) of the electric railway line fitting 1 into the guide portion 7. Furthermore, in the case of removing the trolley wire T from the overhead contact metal fitting 100 for train tracks during replacement work or the like, even if the male threaded body 110 comes off the female threaded body 50, the female threaded body 50 is held by the guide portion 7, making it possible to prevent the female threaded body 50 from falling.

[0072] The opening 7b of the guide 7 is preferably provided on the upper side (upper side in the Z-axis direction) of the main body 3b, but is not limited thereto. For example, the opening 7b of the guide 7 may be provided on the side (Y-axis direction) of the main body 3b. The guide portion 7 may be provided with a drain on the lower side (lower side in the Z-axis direction) of the guide portion 7 in order to prevent accumulation of rainwater, etc. For example, by providing a drain hole or groove in the stopper 7c, it becomes possible to prevent accumulation of rainwater, etc.

[0073] In this embodiment, the guide portion 7 is used to make the female threaded body 50 detachable. However, the female threaded body 50 may be provided on the second clamping body 3 without using the guide portion 7. For example, the female threaded body 50 may be fixed to the second clamping body 3 by welding, or the female threaded body 50 and the second clamping body 3 may be processed as an integrated body.

[0074] Next, the internally threaded body 50 will be described. As shown in Fig. 12(A), the female-threaded body 50 is made of a plate-like member 55 having a substantially rectangular shape in plan view with a short side portion 50a and a long side portion 50b, and has a through hole 51 formed in the approximate center thereof. A second female-threaded portion 53 (see Fig. 12(C)) that can be screwed into the left-handed thread 131b of the male-threaded portion 130b of the male-threaded body 110 is formed in the through hole 51. The plate-like member 55 is not limited to a rectangular shape, and may be a square shape, etc. In this embodiment, the second female threaded portion 53 of the female threaded body 50 is formed with a left-handed thread that can be screwed into the left-handed thread 131b of the male threaded body 110, but is not limited thereto. For example, the second female threaded portion 53 of the female threaded body 50 may be formed with a right-handed thread that can be screwed into the right-handed thread 131a of the male threaded body 110. In this case, the first female threaded portion 11 of the second clamping body 3 is formed with a left-handed thread that can be screwed into the left-handed thread 131b of the male threaded body 110.

[0075] A handle portion 55a for insertion and removal may be provided on the plate-shaped member 55. For example, as shown in Fig. 13, the handle portion 55a having a generally L-shaped cross section is formed on one end portion of the plate-shaped member 55. This allows an operator to easily insert and remove the plate-shaped member 55 by using the handle portion 55a.

[0076] 12(A), six elastic plate pieces 52 each having a substantially arc-shaped tip portion 52a are disposed on the through hole rim that borders the entire circumference of the through hole 51. The tip portions 52a of these plate pieces 52 each protrude at an angle toward the axis C of the second female thread portion 53, and are arranged in a virtual left-handed spiral shape as a whole. In this embodiment, the number of plate pieces 52 is set to six, but it is sufficient that the number is one or more.

[0077] In addition, the radially outer portion of the plate piece 52 is fixed to the periphery of the through hole 51, and the radially inner portion of the plate piece 52 is made a free end, and this free end side is configured to bend in only one direction from the steady position toward the direction of tightening the male threaded body 110.

[0078] As shown in Figures 12 and 15, the width, inclination angle, and installation positions of the six plate pieces 52 are set so as to match the pitch, outer diameter, and valley diameter of the second spiral groove 133b, which is the left-handed thread 131b of the male-threaded body 110, and the tip shape of the plate pieces 52 is formed into an arc that forms a left-handed spiral. That is, the second female-threaded portion 53 of the female-threaded body 50 is formed with a second helical thread 54 of an intermittent helical left-handed thread that can be screwed into the second helical groove 133b of the male-threaded body 110. In this embodiment, the intermittent helical thread is formed by six plate pieces 52, but the present invention is not limited to this. For example, a continuous helical thread may be formed by one plate piece 52.

[0079] The width of the plate piece 52 is set to the difference between the outer diameter and the root diameter of the left-handed thread 131b of the male-threaded body 110. The installation inclination angle is set corresponding to the ratio of the pitch to the outer diameter of the left-handed thread 131b of the male-threaded body 110. Here, the outer diameter of the right-hand thread 131a and the outer diameter of the left-hand thread 131b of the male-threaded body 110, and the root diameter of the right-hand thread 131a and the root diameter of the left-hand thread 131b are set to be equal, but they can also be set to be different. The radial inclination of the plate piece 52 from the through hole 51 of the plate-shaped member 55 arranged perpendicular to the axis of the first female thread portion 11 is set so that T ≒ tan θ, where θ is the inclination angle from a plane perpendicular to the axis of the first female thread portion 11 and T is the ratio of the pitch PL to the outer diameter of the left-handed thread 131b of the male-threaded body 110. In other words, when the lead angle of the first helical rib 12 on the inner peripheral surface of the first female thread portion 11 is taken as α, the angle is set to approximately θ=(180-2α)°±15°. The positions of the plate pieces 52 are set to correspond to the pitch PL of the left-handed thread 131b of the male-threaded body 110, so that the plate pieces 52 are in a positional relationship in which they mesh with the left-handed thread 131b. When a plurality of plate pieces 52 are provided, they can be arranged so as to be staggered with respect to each other.

[0080] As shown in Figure 16, when the male-threaded body 110 is tightened and moves due to the screwing of the first female-threaded portion 11, the free ends of the plate pieces 52 arranged on the second clamping body 3 on the radial center side bend and expand toward the direction of travel of the male-threaded body 110, or contract and close due to elastic restoring force.

[0081] When each plate piece 52 is screwed to the required position in the male threaded portion 130b of the male threaded body 110, it returns to its original position due to its elastic restoring force and engages with the left-handed threads 131b of the male threaded body 110, so that each plate piece 52 and the left-handed threads 131b are aligned with each other. Each plate piece 52 aligned with the left-handed thread 131b of the male-threaded body 110 does not bend in the direction opposite to the moving direction of the male-threaded body 110 (the moving direction when the male-threaded body 110 is loosened). Alternatively, the plate pieces 52 are provided so as to be extremely difficult to bend.

[0082] Here, when the overhead contact wire CA for the train line, such as the trolley wire T, vibrates, for example, due to the passage of a train pantograph P, the vibration is transmitted to the overhead contact wire fitting 100 for the train line. This vibration may also apply a counterclockwise torque to the first female thread portion 11 of the overhead contact wire fitting 100 for the train line. In this case, when a counterclockwise torque is applied to the first female threaded portion 11, as shown in Figure 16, a force in the opposite direction to the direction of advancement during screwing is applied to the second clamping body 3 itself. However, since the plate pieces 52 are aligned with the left-handed threads 131b of the male threaded body 110 and the plate pieces 52 do not bend in the opposite direction, a force that tends to advance in the direction of advancement of the left-handed thread, i.e., the direction of advancement during screwing (towards the head 120 of the male threaded body 110) is applied to each plate piece 52 on which the counterclockwise torque is applied. In other words, the force tending to move the right-handed first helical thread 12 formed on the inner surface of the insertion hole 3c of the second clamping body 3 backward and the force tending to move the plate pieces 52 fixed to the second clamping body 3 forward are counterbalanced, and as a result, the second clamping body 3 stops at a given fixed position on the overlap region W of the male-threaded body 110. That is, in the screw-engaged combination of the male threaded body 110 of this embodiment and the first female threaded portion 11 of the second clamping body 3, the second clamping body 3 either advances or stops, but does not retreat. Therefore, the male threaded body 110 does not advance in a direction that loosens it from the first female thread portion 11. In other words, according to the overhead contact wire fitting 100 for train tracks of the second embodiment, the male threaded body 110 is restricted from loosening.

[0083] [Third embodiment] FIG. 18 is a diagram showing an overhead contact metal fitting 300 for an electric rail track according to the third embodiment.

[0084] A description will now be given of an overhead contact wire fitting 300 for a train track according to a third embodiment of the present invention. In the third embodiment, the overhead contact wire fitting 300 for train tracks will be described as being applied to a connector fitting 800 that clamps a trolley wire T shown in Fig. 31. Of course, the application of the overhead contact wire fitting 300 for train tracks is not limited to connector fittings. Also, although the overhead contact wire CA for train tracks will be described as the trolley wire T, the overhead contact wire CA for train tracks is not limited to the trolley wire T. Details will be described below.

[0085] Here, connector fitting 800 is a fitting that electrically connects wires such as the trolley wire T and the suspension wire M of the train line, and is generally composed of a lead wire 810 using soft copper stranded wire, an ear 801, and a clamp (not shown). Ear 801 holds the trolley wire T, and the clamp holds the suspension wire M at loop portion 820. Note that loop portion 820 is not limited to a loop shape and may be another shape.

[0086] In this embodiment, the overhead contact line fitting 300 can be used as an ear 801 of a connector fitting 800. In the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals as those in the first and second embodiments, and detailed description thereof will be omitted.

[0087] The overhead contact metal fitting 300 for use with train tracks is composed of a first clamping body 302 shown in Figures 18(A) and (B), a second clamping body 303 and an internally threaded body 50 shown in Figures 18(C) and (D), and an externally threaded body 110 shown in Figure 9. The overhead contact metal fitting 300 for use with train tracks clamps an overhead contact wire CA for use with train tracks, such as a trolley wire T, located between the first clamping body 302 and the second clamping body 303 by tightening the externally threaded body 110.

[0088] The accommodation portion 5 of the first clamping body 302 is capable of accommodating the insertion portion 6 of the second clamping body 303, and is configured so that the male threaded portion 130b of the male threaded body 110 and the first female threaded portion 11 of the second clamping body 303 can be screwed relative to each other, thereby allowing the insertion portion 6 to advance and retreat within the accommodation portion 5. Furthermore, by using the female threaded body 50, the male threaded body 110 is restricted from loosening.

[0089] The difference from the second embodiment is that the overhead contact wire fitting 300 for use in an electric rail track uses two male threaded bodies 110 to clamp the overhead contact wire CA for use in an electric rail track.

[0090] 18(A) and 18(B), the first clamping body 302 has two insertion holes 2c formed in the main body 2b at the front and rear positions in the extending direction of the trolley wire T. An accommodating portion 5 for accommodating at least a part of the insertion portion 6 of the second clamping body 303 is formed and connected to each insertion hole 2c.

[0091] 18(C) and (D), the second clamping body 303 has two insertion holes 6c formed in the main body 3b at the front and rear positions in the extending direction of the trolley wire T. An insertion portion 6, at least a part of which is accommodated in the accommodation portion 5 of the first clamping body 302, is formed and connected to each insertion hole 3c.

[0092] The second clamping body 303 has a connection portion 4 formed in the extending direction of the trolley wire T. The connection portion 4 is fixed to one end of the lead wire 810 of the connector fitting 800 by compression connection or the like. Incidentally, the connection portion 4 is formed on the side (X-axis direction or Y-axis direction) of the second clamping body 303, but the location where it is formed is not limited thereto. It may be formed in the Z-axis direction, such as on the upper or lower side of the second clamping body 303. Also, it is not necessary to form the connection portion 4 on the second clamping body 303, and the connection portion 4 may be provided on the first clamping body 302.

[0093] The second clamping body 303 has a guide portion 7 that allows the female-threaded body 50 to be attached and detached. The guide portion 7 is formed in each of the two insertion holes 3c. When two guide portions 7 are provided, the female-threaded body 50 of two plate-shaped members 55 is required. It is not necessary to form a guide portion 7 in each of the insertion holes 3c. For example, one guide portion 7 may be formed in each of the two insertion holes 3c, and one plate-like member 55 may be used as the female-threaded body 50. In this case, two second female-threaded portions 53 are formed in one plate-like member 55.

[0094] In this embodiment, the first clamping body 302 is provided with two accommodation sections 5, but the present invention is not limited thereto. For example, as shown in Figs. 19(A) and (B), the first clamping body 352 may be provided with the accommodation section 5 and the insertion section 6. In this case, as shown in Figs. 19(C) and (D), the second clamping body 353 is provided with the accommodation section 5 and the insertion section 6. The accommodation section 5 of the first clamping body 352 is provided with the insertion section 6 of the second clamping body 353 so as to face each other, and the insertion section 6 of the first clamping body 352 is provided with the accommodation section 5 of the second clamping body 353 so as to face each other.

[0095] In addition, in this embodiment, the second clamping body 303 is provided with two guide portions 7 and two internally threaded bodies 50 are arranged thereon, but this is not limited thereto. For example, as shown in Fig. 19, one internally threaded body 50 may be arranged on the first clamping body 352, and one internally threaded body 50 may be arranged on the second clamping body 353.

[0096] Similarly to the first embodiment, it is preferable that the minimum distance between the first clamping portion 2a and the second clamping portion 3a is equal to or greater than the maximum compressed width of the material of the trolley wire T in the elastic region. As a result, the trolley wire T is clamped with a stress equal to or less than its yield strength, making it possible to increase the durability of the trolley wire T compared to a trolley wire fitting for a train track that does not have this configuration. For example, even if an operator overtightens the male threaded body 110 when installing a trolley line fitting, a clamping force is applied to the trolley wire T located between the first clamping portion 2a and the second clamping portion 3a while exerting a stress equal to or less than the yield strength.

[0097] As in the first embodiment, an elastic member 9 functioning as a biasing portion may be interposed between the male threaded body 110 and the first clamping body (302, 352). In the third embodiment, a plurality of male threaded bodies 110 are used, and the necessity for the elastic member 9 may be appropriately determined for each male threaded body 110.

[0098] Although the male-threaded body 110 is as described in the second embodiment, it is not necessary to use a male-threaded body 110 having two types of male-thread spiral grooves. For example, when a female-threaded body 50 having a second female-threaded portion 53 is not used, the male-threaded body 10 described in the first embodiment may be used.

[0099] [Modification of the third embodiment] FIG. 33 is a perspective exploded view showing an overhead contact wire fitting 1000 according to a modified example of the third embodiment. FIG. 34 shows an overhead contact wire fitting 1000 according to a modified example of the third embodiment, where (A) is a front view, (B) is a side view, and (C) is a rear view.

[0100] The following describes an overhead contact wire fitting 1000 for an electric rail track, which is a modified example of the third embodiment of the present invention. The overhead contact line fitting 1000 according to the modified example of this embodiment can be applied to a dropper clip that clamps a suspension wire and an auxiliary suspension wire, and an auxiliary arm clip that clamps an auxiliary suspension wire. Of course, the application of the overhead contact line fitting 1000 is not limited to dropper clips and auxiliary arm clips. Also, although the suspension wire and auxiliary suspension wire are described as overhead contact lines CA for the overhead contact lines, the overhead contact lines CA is not limited to this. Details are described below. In this embodiment, the same components as those in the first to third embodiments are denoted by the same reference numerals as those in the first to third embodiments, and detailed description thereof will be omitted.

[0101] 33, the overhead contact line fitting 1000 is made up of a first clamping body 1002, a second clamping body 1003, a male threaded body 1010, and a female threaded body 1050. The overhead contact line fitting 1000 clamps the overhead contact line CA, such as an auxiliary suspension wire, located between the first clamping body 1002 and the second clamping body 1003 by tightening the male threaded body 1010.

[0102] The difference from the third embodiment is that, as shown in Figs. 33 and 34, the electric rail line fitting 1000 has a clamping body which does not have an insertion portion and a storage portion, and a first clamping body 1002 and a second clamping body 1003 are connected by connecting portions (1002d, 1003d).

[0103] The male threaded body 1010 will now be described. As shown in FIG. 33, the male-threaded body 1010 has a head 1020 and a shaft portion 1030. The head 1020 is provided at one end of the shaft portion 1030 and has a larger outer diameter than the shaft portion 1030. A hexagonal hole 1020a is formed in the head 1020 of the male-threaded body 1010 (see FIG. 34(C)), and the head 1020 is attached and detached by a tool or the like to which a hexagonal bit is attached. The male-threaded body 1010 is a so-called fully threaded body, and a male-threaded portion 1030b is provided on substantially the entire shaft portion 1030. The male-threaded portion 1030b has an overlapping region on the outer circumferential surface of the shaft portion 1030, in which two types of male-threaded spiral grooves, a first spiral groove 1033a which is a right-handed thread 1031a and a second spiral groove 1033b which is a left-handed thread 1031b, are overlapped on the same region. Therefore, the male thread portion 1030b can be screwed into either a right-handed or left-handed female-threaded body. In this embodiment, the male thread portion 1030b is provided on substantially the entire shaft portion 1030, but is not limited to this. For example, the shaft portion 1030 may be provided with a cylindrical portion that is not provided with the male thread portion 1030b.

[0104] The clamping bodies (1002, 1003) will be described. As shown in Figures 33 and 34, the first clamping body 1002 and the second clamping body 1003 have, from the lower side (-Z side) which is its base end, a connecting portion 1002d, a first clamping portion 1002a continuing above the connecting portion, and a main body portion 1002b, and the second clamping body 1003 has, from the lower side (-Z side) which is its base end, a connecting portion 1003d, a second clamping portion 1003a continuing above the connecting portion, and a main body portion 1003b.

[0105] The connecting portions (1002d, 1003d) will be described. The connecting portion 1002d is provided on the base end side of the first clamping body 1002, and has one ring portion formed with a bearing hole that supports the shaft body 1060. In addition, the connecting portion 1003d is provided on the base end side of the second clamping body 1003, and has two ring portions formed with bearing holes that support the shaft body 1060. The shaft 1060 is inserted into the rings of both of the connecting parts (1002d, 1003d). The connecting parts 1002d, 1003d, and the shaft 1060 form a so-called hinge structure. This hinge structure allows the first clamping body 1002 and the second clamping body 1003 to open and close with the shaft 1060 at the base end as the central axis. This opening and closing action allows the pair of clamping parts (1002a, 1003a) to clamp or attach / detach the electric rail overhead wire CA.

[0106] The clamping units (1002a, 1003a) will be described. The first clamping portion 1002a and the second clamping portion 1003a are opened and closed by the above-mentioned hinge structure to clamp the overhead wire CA for electric railroad tracks positioned between the pair of clamping portions (1002a, 1003a).

[0107] As shown in FIG. 33, the first clamping portion 1002a has a substantially semicircular shape that opens toward the second clamping portion 1003a, and the second clamping portion 1003a has a substantially semicircular shape that opens toward the first clamping portion 1002a. As shown in FIG. 34(B), first clamping body 1002 and second clamping body 1003 form a substantially annular shape by the inner circumferential surfaces of first clamping portion 1002a and second clamping portion 1003a when the hinge structure is in a closed state.

[0108] More specifically, the first clamping portion 1002a is formed so that the inner surface side is substantially semicircular from the base end side of the first clamping body 1002 toward the approximate center of the second clamping body 1003. The tip side of the first clamping portion 1002a abuts against the second clamping body 1003 as one abutting member 1002e having a substantially tongue-shaped cross section. The second clamping portion 1003a is formed so that the inner surface side is substantially semicircular from the base end side of the second clamping body 1003 toward the approximate center of the first clamping body 1002. The tip side of the second clamping portion 1003a abuts against the first clamping body 1002 as two abutting members 1003e having a substantially tongue-shaped cross section.

[0109] By providing this abutment member (1002e, 1003e), the contact area between the abutment member and the overhead wire CA for the electric rail is increased, making it easier to hold the overhead wire CA for the electric rail within the pair of clamping portions (1002a, 1003a), thereby improving workability and construction efficiency. In this embodiment, the description is based on the premise that the abutment is performed by the abutment member, but abutment is not necessarily required. By configuring the overhead wire CA for the train track to be easily held within the pair of clamping parts, it is possible to improve workability and ease of construction.

[0110] The main body parts (1002b, 1003b) will be described. 33, the main body 1002b is formed extending to the upper side (+Z axis) of the train track overhead wire fitting 1000, and has an insertion hole 1002c formed approximately in the center (YZ plane). The upper side (+Z axis) of the main body 1002b is formed in an approximately semicircular shape with a curvature smaller than that of the insertion hole 1002c. 33, the male threaded body 1010 is inserted into this insertion hole 1002c from the rear (-X axis) of the first clamping body 1002. The hole diameter of the insertion hole 1002c is smaller than the outer diameter of the head 1020 of the male threaded body 1010 and larger than the diameter of the male threaded portion 1030b (or the shaft portion 1030).

[0111] As shown in Fig. 33, the main body 1003b is formed extending to the upper side (+Z axis) of the train track overhead wire fitting 1000, and an insertion hole 1003c is formed in approximately the center (YZ plane). The upper side (+Z axis) of the main body 1003b is formed in an approximately semicircular shape with a curvature smaller than that of the insertion hole 1003c. The main body 1003b is also formed with a guide portion 1007 that allows the female threaded body 1050 to be attached and detached. The main body 1003b is also formed with an engagement portion 1007d that engages with the female threaded body 1050 guided by the guide portion 1007.

[0112] The insertion hole 1003c will be described. As shown in FIG. 33, the male threaded body 1010 is inserted into this insertion hole 1003c from the first clamping body 1002 side (-X axis). A first helical rib 1012 constituting a first female thread portion 1011 is formed on an inner peripheral wall portion of the insertion hole 1003c (see FIG. 33). The first helical rib 1012 screws into a first helical groove 1033a in the male thread portion 1030b of the male threaded body 1010. In this embodiment, the first female thread portion 1011 is formed with the first helical rib 1012 which is a right-handed thread, but the first female thread portion 1011 is not limited to a right-handed thread.

[0113] The guide unit 1007 will now be described. As shown in Fig. 33 and Fig. 34(A), the guide portion 1007 is substantially U-shaped with an open opening 1007b on the lower side (-Z axis) and is formed to face the insertion hole 1003c. The guide portion 1007 has a groove 1007a with a substantially U-shaped cross section so that the female-threaded body 1050 described later can be sandwiched therein. The imaginary line (broken line) in Fig. 34(A) indicates the position where the groove 1007a is formed. The groove 1007a is formed in a substantially semicircular shape toward the upper side (+Z axis) while facing the insertion hole 1003c. The female-threaded body 1050 is disposed at a predetermined position along the groove 1007a from the open opening 1007b.

[0114] Depending on the installation orientation of the overhead contact line fitting 1000, the opening 1007b of the guide part 1007 may be located on the lower side (-Z axis). In this case, there is a risk that the female-threaded body 1050 will fall off during the operation of removing the male-threaded body 1010 from the overhead contact line fitting 1000. To prevent this from happening, a mechanism for preventing the female-threaded body 1050 from falling off may be provided. In the train track overhead line fitting 1000 of this embodiment, a semi-spherical protruding engagement portion 1007d is formed on the lower side (-Z axis) of the insertion hole 1003c to engage with the female threaded body 1050 attached to the guide portion 1007. The engagement portion 1007d engages with the female threaded body 1050 to prevent the female threaded body 1050 from falling off the guide portion 1007.

[0115] The position at which the engaging portion 1007d is provided may be such that it engages with the female threaded body 1050 when attached to the guide portion 1007. For example, the engaging portion 1007d may be provided below (-Z axis) the handle portion 55a provided at the end of the female threaded body 1050, at a position where it engages with the male threaded body 1050, or at a position on the main body portion 1002b that overlaps with the female threaded body 1050.

[0116] In this embodiment, one hemispherical protruding engagement portion is provided, but the protruding shape is not limited to a hemispherical shape. Also, the number of protruding shapes is not limited to one, and multiple shapes may be provided.

[0117] Also, a recess corresponding to the shape of the protrusion may be formed on the female threaded body 1050 side. Incidentally, a protrusion may be provided on the female threaded body 1050 without providing a protrusion on the main body 1003b. In this case, a recess corresponding to the protrusion may be formed on the main body 1003b.

[0118] The female-threaded body 1050 will now be described. 33, the female-threaded body 1050 is made of a plate-like member having a substantially U-shape, and has a substantially semicircular portion 1050c formed at one end on the upper side (+Z axis) and a handle portion 55a formed at the other end. The other configuration is the same as that of the female-threaded body 50, and therefore description thereof will be omitted.

[0119] From the viewpoint of stress, the female-threaded body 1050 having the semicircular portion 1050c is more preferable than the female-threaded body 50 having a rectangular shape. This is because stress concentration occurs around the portion where the male-threaded body is inserted, which may cause material destruction. In the female-threaded body 1050 having the semicircular portion 1050c, the stress concentration can be evenly distributed on the circumference in the semicircular portion 1050c. On the other hand, in the female-threaded body 50 having a rectangular shape, stress is likely to concentrate at the corners. Therefore, from the viewpoint of stress, the shape of the female-threaded body 1050 is preferably as circular as possible.

[0120] [Fourth embodiment] FIG. 20 is a perspective view showing an overhead contact metal fitting 400 for an electric rail track according to the fourth embodiment.

[0121] A railroad track overhead wire fitting 400 according to a fourth embodiment of the present invention will now be described. In the fourth embodiment, the overhead contact line fitting 400 is described as being applied to a curved pull fitting 900 that clamps the contact wire T shown in Fig. 32(A), but the present invention is not limited to this. For example, the present invention can be applied to an anti-vibration fitting (not shown) in addition to the curved pull fitting 900. In addition, the overhead contact wire CA for the electric railroad tracks will be described as a contact wire T, but the overhead contact wire CA for the electric railroad tracks is not limited to the contact wire T. In addition, the overhead contact wire CA for the electric railroad tracks will be described as a catenary suspension type, but it can also be applied to a direct suspension type or a rigid type. Details will be described below.

[0122] Here, the curved pull fitting 900 is a fitting that pulls the trolley wire T outward to prevent it from slipping off to the inside of the curve when a catenary-suspended overhead line is stretched in a curved section, and a support member 920 provided at one end of the arm member 910 is connected to a support structure provided on the side of the trolley line, and an ear mounting fitting 950 provided at the other end of the arm member 910 is connected to the ear 901 by a ring-shaped member 951 shown in Fig. 32(B). The ear 901 holds the trolley wire T. The arm member 910 is a metal pipe material that is gently bent from one end where the support member 920 is provided to approximately the middle part, and is formed into a roughly arched curved shape, and from approximately the middle part to the other end where the ear mounting bracket 950 is provided, it is formed in a roughly straight line.

[0123] In this embodiment, the overhead contact wire fitting 400 can be used as an ear 901 of a curved pulley fitting 900. In the fourth embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals as those in the first and second embodiments, and detailed description thereof will be omitted.

[0124] An overhead contact wire fitting 400 for an electric railroad track according to this embodiment will be described.

[0125] As shown in FIG. 20 , the overhead contact wire fitting 400 for use in train tracks clamps an overhead contact wire CA for use in train tracks, such as a trolley wire T, located between a first clamping body 402 and a second clamping body 403, by tightening the male threaded body 110. The accommodation portion 405 of the first clamping body 402 is capable of accommodating the insertion portion 406 of the second clamping body 403, and is configured such that the insertion portion 406 can be advanced and retreated within the accommodation portion 405 by relatively screwing the male threaded portion 130b of the male threaded body 110 and the first female threaded portion 411 of the second clamping body 403. Furthermore, by using the female threaded body 50, the male threaded body 110 is restricted from loosening.

[0126] The difference from the second embodiment is that the first clamping body 402 is composed of a first member 421 and a second member 425.

[0127] As shown in FIGS. 20 and 26, the overhead contact metal fitting 400 for use in a train track includes a first clamping body 402, a second clamping body 403, an externally threaded body 110, and an internally threaded body 50. As shown in FIG.

[0128] As shown in FIG. 20(A), the first clamping body 402 is composed of a first member 421 and a second member 425.

[0129] The first member 421 has a generally T-shape when viewed from the front (when viewed in the X-axis direction) (see FIG. 21), and has, from the lower side (−Z side), a first clamping portion 402a, a main body portion 402b continuing above the first clamping portion 402a, and a connecting portion 404.

[0130] The first clamping portion 402a is disposed in opposition to the second clamping portion 403a of the second clamping body 403 so as to clamp the trolley wire T. The first clamping portion 402a is formed along the lower end edge of the main body portion 402b so as to protrude toward the second clamping body 403. The first clamping portion 402a fits laterally into a groove portion M along the longitudinal direction of the circumferential surface of the trolley wire T.

[0131] The main body 402b has a rectangular shape when viewed from the front (when viewed in the X-axis direction), and has an insertion hole 402c formed in its approximate center. As shown in FIG. 20, the male threaded body 110 is inserted into this insertion hole 402c from the rear (-X side) of the first clamping body 402 via the second member 425. As shown in FIGS. 20 and 22, the hole diameter of the insertion hole 402c is formed smaller than the diameter of the head 120 of the male threaded body 110 and larger than the diameter of the shaft portion 130 on the entrance side where the female threaded body 110 is inserted. On the other hand, the hole diameter of the insertion hole 402c is enlarged on the outlet side of the male threaded body 110 inserted into the insertion hole 402c, and a hollow cylindrical receiving portion 405 is formed.

[0132] 22, the accommodation portion 405 has an inner circumferential wall portion 405b extending in the X-axis direction from a bottom surface 405a to an axis C of the connection portion 404. That is, a tip edge 405c of the inner circumferential wall portion 405b is formed at approximately the same position as the axis C of the connection portion 404. The accommodating portion 405 accommodates the insertion portion 406 of the second clamping body 403. Note that the accommodating portion 405 does not need to accommodate the entirety of the insertion portion 406, but only needs to be formed so as to be able to accommodate at least a part of the insertion portion 406, and to be configured so that the insertion portion 406 can relatively advance and retreat within the accommodating portion 405.

[0133] The tip edge 405c of the accommodating portion 405 does not necessarily have to be formed at approximately the same position in the X-axis direction as the axis C of the connecting portion 4. For example, the position of the tip edge 405c of the accommodating portion 405 may be a position beyond the axis C, or may be a position just before the axis C.

[0134] The main body portion 402b has a receiving portion 422 formed on the surface opposite to the surface on which the accommodating portion 405 is formed, the receiving portion 422 being fitted with the second member 425 (see FIG. 21(B) and FIG. 22).

[0135] The connecting portion 404 is used for connecting to a curved pull fitting 900 (see FIG. 32) or the like. The connecting part 404 is connected to an ear mounting bracket 950 provided at one end of an arm member 910 constituting the curved pulling metal fitting 900. A rotation mechanism is used between the connecting part 404 and the ear mounting bracket 950 so as to follow the expansion and contraction of the contact wire caused by changes in temperature, etc. For example, when connecting to a circular ring-shaped member 951 shown in Fig. 32(B) as the rotation mechanism, the ring-shaped member 951 can rotate around the axis C of the connecting part 404.

[0136] It is not necessary to provide a rotation mechanism for connection to another member, and the connection portion 404 may be fixed to the other member by crimping or the like.

[0137] A pressure equalizing fitting (not shown) is connected between connection portion 404 and ear mounting bracket 950 as a measure against electrical wear due to circulating current. A bolt hole 430 is formed in the center of the upper end surface of large diameter portion 404b that constitutes connection portion 400. One end of the pressure equalizing fitting is fixed with a bolt in bolt hole 430, and the other end is fixed with a bolt in bolt hole 930 of ear mounting bracket 950 (see FIG. 32(B)).

[0138] As shown in FIGS. 20 and 21, the connecting portion 404 is cylindrical, with one end being a small diameter portion 404a and the other end being a large diameter portion 404b having a larger diameter than the small diameter portion 404a. The axial length of small diameter portion 404a is longer than the axial length of large diameter portion 404b. The lengths of small diameter portion 404a and large diameter portion 404b are appropriately set depending on the specifications of the member to be connected to connecting portion 404, etc. In the present embodiment, the connecting portion 404 is provided on the first clamping body 402, but this is not limiting. For example, the connecting portion 404 may be provided on the second clamping body 403.

[0139] In the present embodiment, the connection portion 404 is formed to extend upward (+Z-axis) of the railroad track overhead wire fitting 400, but it may be formed to extend in the X-axis and / or Y-axis directions.

[0140] Moreover, in order to reduce the weight of the overhead contact wire fitting 400, a cavity may be formed inside the connecting portion 404. FIG. 35 is a perspective view showing an overhead contact metal fitting 1400 for use in an electric rail track. FIG. 36 shows an overhead contact metal fitting for a trolley line, where (A) is a top view and (B) is a cross-sectional view taken along the line AA in (A).

[0141] 35 and 36, a first member 1421 constituting the first clamping body 1402 has a connecting portion 1404. Like the connecting portion 404 in the overhead contact wire metal fitting 400, the connecting portion 1404 is cylindrical, with one end being a small diameter portion 1404a and the other end being a large diameter portion 1404b having a diameter larger than that of the small diameter portion 404a. As shown in FIG. 36(B), the overhead contact wire fitting 1400 for railroad tracks has a cavity 1436 formed inside the connecting portion 1404. As shown in Figures 36(A) and (B), the hollow portion 1436 has a ring-shaped opening 1435 at approximately the center of the upper end surface of the large diameter portion 1404b of the connection portion 1404, and a cavity forming a ring-shaped inner wall portion 1440a extends downward (-Z axis) from the opening 1435, and has a sloped bottom surface portion 1440b within the small diameter portion 1404a. If rainwater or the like gets into the hollow portion 1436, a drain hole may be formed in the bottom surface portion 1440b of the hollow portion 1436 to facilitate drainage of the rainwater or the like to the outside of the train track overhead line metal fitting 1400. The drain hole 1450 is an annular opening smaller than the opening portion 1435, and is formed at the lowest side (-Z axis) of the sloped bottom surface portion 1440b, and drains rainwater or the like in the hollow portion 1436 to the outside from the lower end of the small diameter portion 1404a.

[0142] When forming the hollow portion 1436, the position (bolt hole) for fixing the pressure equalizing metal fitting can be provided on the upper end surface of the large diameter portion 1404b where the opening 1435 is not formed. In this case, it is preferable to form the bolt hole 1430 as the position for fixing the pressure equalizing metal fitting on the imaginary line (dashed line) shown in FIG. 35. This imaginary line indicates the axis of the arm member 910 (see FIG. 32(A)) connected to the ear mounting metal fitting 950 (see FIG. 32(B)). By forming the bolt hole 1430 on this imaginary line, the annular member 951 can easily rotate left and right around the axis of the connection portion 1404 when following the expansion and contraction of the contact wire due to temperature changes, etc.

[0143] 20 and 23, the second member 425 has a generally rectangular shape when viewed from the front (when viewed in the X-axis direction), and has an insertion hole 425b formed in the general center thereof. The second member 425 has a generally C-shape when viewed from above (when viewed in the Z-axis direction).

[0144] The outer peripheral side surface of the second member 425 on the side (−X direction) where the male threaded body 110 is inserted is formed in an arc shape. On the other hand, the inner surface side is formed with a recess 425a that is substantially C-shaped when viewed from above (when viewed in the Z-axis direction). The recess 425a is shaped to fit into the receiving portion 422 of the first member 421. When the recess 425a and the receiving portion 422 are fitted together, the insertion hole 425b of the second member 425 is aligned with the insertion hole 402c of the first member 421. The male threaded body 110 is inserted from the insertion hole 425b of the second member 425 into the insertion hole 402c of the first member 421.

[0145] As shown in FIGS. 20 and 25, the second clamping body 403 is composed of, from the lower side (−Z side), a second clamping portion 403a and a main body portion 403b continuing upward therefrom.

[0146] The second clamping portion 403a is disposed in opposition to the first clamping portion 402a of the first clamping body 402 so as to clamp the trolley wire T. The second clamping portion 403a is formed along the lower end edge of the main body portion 403b so as to protrude toward the first clamping body 402. The second clamping portion 403a fits laterally into a groove portion M along the longitudinal direction of the circumferential surface of the trolley wire T.

[0147] 26, in a state where the trolley wire T is clamped between the first clamping portion 402a and the second clamping portion 403a, a distance between the first clamping portion 402a and the second clamping portion 403a corresponding to the position of the groove portion M is defined as D. It is preferable that the bottom surface 405a of the accommodating portion 405 abuts against the tip edge 406c of the insertion portion 406 and / or the tip edge 405c of the accommodating portion 405 abuts against the main body portion 403b of the second clamping body 403 so that the minimum distance of this distance D is equal to or greater than the maximum compressed width of the groove portion M of the trolley wire T in the elastic region. In addition, the contact points are not limited to these points. That is, it is sufficient that the minimum distance D is not reduced any more by the contact between any point of the first clamping body 402 (421, 425) and any point of the second clamping body 403. In the above description, the distance between the first clamping portion 402a and the second clamping portion 403a is taken as D, taking the position of the groove M in the trolley wire T as an example. However, this is not limited to the distance between the first clamping portion 402a and the second clamping portion 403a corresponding to the position of the groove M. In other words, it is only necessary that the minimum distance between the first clamping portion 402a and the second clamping portion 403a at a specific position of the trolley wire T clamped by the first clamping portion 402a and the second clamping portion 403b is configured to be equal to or greater than the maximum compressed width in the elastic region of the material of the trolley wire T. As a result, the trolley wire T is clamped by a stress equal to or less than the yield strength. Compared to overhead contact wire fittings for train tracks, it is possible to increase the durability of the contact wire T. For example, even if an operator overtightens the male threaded body 110 when installing the trolley line fitting 400, a clamping force is applied to the trolley wire T located between the first clamping portion 402a and the second clamping portion 403a, with a stress equal to or less than the yield strength.

[0148] As shown in FIG. 24, the main body portion 403b has, at approximately the center thereof, an insertion hole 403c into which the male threaded portion 130b of the male threaded body 110 can be inserted. An insertion portion 406 that can be accommodated in the accommodation portion 405 of the first clamping body 402 is formed on one side of the main body portion 403b. In addition, a guide portion 407 that allows the female threaded body 50 to be attached and detached is formed on the other side of the main body portion 403b.

[0149] The insertion portion 406 is connected to the insertion hole 403c, and is formed in a hollow cylindrical shape extending toward the first clamping body 402. At least a portion of the insertion portion 406 can be accommodated in the accommodating portion 405 of the first clamping body 402 (see FIG. 26). 25, a first helical rib 412 that constitutes a first female threaded portion 411 is formed in the insertion hole 403c. The first helical rib 412 is screwed into a first helical groove 133a in the male threaded portion 130b of the male threaded body 110. In this embodiment, the first female thread portion 411 is formed with the first helical thread 412 which is a right-handed thread, but the first female thread portion 411 is not limited to a right-handed thread.

[0150] A tip edge 406c of the insertion portion 406 is formed toward the first clamping body 402 at a position beyond the axis C of the connection portion 404 in the X-axis direction. 25 and 26, the insertion portion 406 has an inner circumferential wall portion 406b extending beyond the axis C of the connection portion 404 in the X-axis direction toward the first clamping body 402. That is, a tip edge 406c of the inner circumferential wall portion 406b is formed at a position beyond the axis C of the connection portion 404 in the X-axis direction.

[0151] It is sufficient that at least a portion of the insertion portion 406 is formed so that it can be accommodated in the accommodation portion 405, and that the insertion portion 406 is configured so that it can relatively advance and retreat within the accommodation portion 405. The tip edge 406c of the insertion portion 406 does not necessarily have to be formed at a position that exceeds the axis C of the connection portion 404 in the X-axis direction toward the first clamping body 402. The position of the tip edge 406c of the insertion portion 406 may be up to the position of the axis C, or it may not need to reach the position of the axis C.

[0152] The guide portions 407 are formed so as to face both sides of an insertion hole 403c formed in a main body portion 403b of the second clamping body 403, as shown in FIG. 24(A). As shown in FIG. 24(C), the guide portion 407 has a recessed groove 407a having a generally U-shaped cross section so that the plate-shaped internally threaded body 50 can be sandwiched therein. An open opening 407b is formed on the upper side (upper side in the Z-axis direction) of the groove 407a, and a stopper 407c is formed on the lower side (lower side in the Z-axis direction) of the groove 407a. As a result, the female threaded body 50 is disposed at a predetermined position along the groove 407a from the open opening 407b.

[0153] The opening 407b of the guide portion 407 is preferably provided on the upper side (upper side in the Z-axis direction) of the main body portion 403b, but is not limited thereto. For example, the opening 407b of the guide portion 407 may be provided on the side (Y-axis direction) of the main body portion 403b. When an ear mounting bracket 950 (see FIG. 32) is connected to the connection portion 404, if the opening 407b of the guide portion 407 is located on the upper side (upper side in the Z-axis direction), the ear mounting bracket 950 will get in the way when, for example, removing the female threaded body 50 from the guide portion 407b. On the other hand, as shown in Figure 35, by providing the opening of the guide portion 1407 on the side (Y-axis direction) of the main body portion 403b, the same as the direction in which the trolley wire T extends (Y-axis direction), the ear mounting bracket 950 does not get in the way when removing the female threaded body 1050.

[0154] The guide portion 407 may have a drain on the lower side (lower side in the Z-axis direction) of the guide portion 407 to prevent accumulation of rainwater, etc. For example, by providing a drain hole or groove in the stopper 407c, it becomes possible to prevent accumulation of rainwater, etc.

[0155] In this embodiment, the guide portion 407 is used to make the female threaded body 50 detachable. However, the female threaded body 50 may be provided on the second clamping body 403 without using the guide portion 407. For example, the female threaded body 50 may be fixed to the second clamping body 403 by welding, or the female threaded body 50 and the second clamping body 403 may be processed as an integrated body.

[0156] The male-threaded body 110 is as described in the second embodiment, and a description thereof will be omitted. It is not necessarily required to use the male-threaded body 110 having two types of male-threaded spiral grooves. For example, when the internally-threaded body 50 having the second internally-threaded portion 53 is not used, the externally-threaded body 10 described in the first embodiment may be used.

[0157] As in the first embodiment, an elastic member 9 functioning as a biasing portion may be interposed between the male threaded body 110 and the second member 425 constituting the first clamping body 402.

[0158] The internally threaded body 50 is as described in the second embodiment, and a description thereof will be omitted.

[0159] Here, in the curved pull fitting disclosed in Patent Document 2 (see Figs. 5 to 7), the curved pull fitting has a large number of parts that make up the fitting, and the structure is complicated, so that the construction work, such as replacing the contact wire, requires a large number of steps. As will be described in detail later, it is necessary to tighten the bolts two or more times, and it is a complicated task that requires the use of both hands during the work. The overhead contact line fitting according to the fourth embodiment makes it possible to reduce the number of bolt tightening operations and the like during work such as replacing the contact wire, thereby improving workability compared to conventional work. Details will be described below.

[0160] The procedure for attaching the overhead contact wire fitting 400 to the ear fittings (see FIG. 32) of the trolley wire T and the curved pull fitting 900 will be described with reference to FIG. 27 and FIG. 37(A). For example, this attachment procedure can be carried out when replacing the trolley wire T. The curved pull fitting 900 includes a substantially annular ear mounting fitting 950. The connection portion 404 of the overhead contact line fitting 400 is connected to the ear mounting fitting 950.

[0161] First, as shown in FIG. 27(A), the connection portion 404 of the first member 421 of the first clamping body 402 is inserted into the annular member 951 (see FIG. 32(B)) of the ear mounting metal fitting 950 (FIG. 37(A)(st1)).

[0162] The ear mounting metal fitting 950 can rotate about the axis C of the connecting portion 404. As a result, sliding occurs between the lower end surface 951a of the annular member 951 in the ear mounting metal fitting 950 and the upper end surface 425d of the second member 425 and the upper end surface 403d of the second clamping body 403 that constitute the first clamping body 402 and face the lower end surface 951a, as shown in FIG. 27(B), causing wear on the sliding surfaces. For this reason, a washer 960 may be interposed between these end surfaces. This makes it possible to suppress wear on the sliding surfaces. 28, when the washer 960 is not used, a rounded R portion may be formed on each corner of the upper end surface 425d of the second member 425 and the upper end surface 403d of the second clamping body 403, on the opposing sides of the second member 425 and the second clamping body 403. Of course, the washer 960 can also be used.

[0163] 27(B), with the annular member 951 of the ear mounting metal fitting 950 inserted into the connecting portion 404, the second clamping body 403 is fitted into the first member 421 from one side (+X side) of the first member 421. This results in a state in which the insertion portion 406 of the second clamping body 403 is accommodated in the accommodating portion 405 of the first member 421. When the second clamping body 403 is fitted into the first member 421, the trolley wire T (not shown) is positioned between the first clamping portion 402a and the second clamping portion 403a.

[0164] Next, the second member 425 is fitted into the first member 421 from the side (-X side) facing the second clamping body 403. This results in a state in which the receiving portion 422 of the first member 421 and the recessed portion 425a of the second member 425 are fitted together (FIG. 37(A)(st2)).

[0165] The order in which the second clamping body 403 and the second member 425 are fitted into the first member does not matter. The second member 425 may be fitted into the first member 421 before the second clamping body 403.

[0166] Here, the outer diameter R of the small diameter portion 404a of the connecting portion 404 is smaller than the outer diameter r1 of the large diameter portion 404b (see FIG. 27(A)). Further, the outer diameter R of the small diameter portion 404a of the connecting portion 404 is smaller than the outer diameter r2 when the first clamping body 402, which is composed of the first member 421 and the second member 425, and the second clamping body 403 are assembled (see FIG. 27(C)). On the other hand, the inner diameter r of the annular member 951 in the ear mounting bracket 950 is slightly larger than the outer diameter R of the small diameter portion 404a, and is smaller than the outer diameter r1 of the large diameter portion and the outer diameter r2 when the first clamping body 402 and the second clamping body 403 are combined. Further, a lower end surface 951a (lower side in the Z axis direction) of the annular member 951 of the ear mounting metal fitting 950 is configured to be received by an upper end surface of the second clamping body 403 (upper side in the Z axis direction). Therefore, when the ear mounting metal fitting 950 is inserted into the overhead contact line metal fitting 400 , the ear mounting metal fitting 950 can rotate at the connection part 404 but will not come off the overhead contact line metal fitting 400 .

[0167] Furthermore, when the annular member 951 is present in the small diameter portion 404a of the connection portion 404, if the first member 421 and the second member 425 are engaged with each other, the upper end surface 425d of the second member 425 and the lower end surface 951a of the annular member 951 abut against each other, thereby preventing the annular member 951 from coming off the small diameter portion 404a. Similarly, when the first member 421 and the second clamping body 403 are combined, the upper end surface 403d of the second clamping body 403 abuts against the lower end surface 951a of the annular member 951, preventing the annular member 951 from coming out of the small diameter portion 404a. When a washer 960 is interposed between the lower end surface 951a of the annular member 951 and the second member 425 and second clamping body 403, the two come into contact with each other via the washer 960.

[0168] This makes it possible to improve workability by making it difficult for the annular member 951 to come loose during work to connect the overhead contact line metal fitting 400 and the annular member 951 and during work to replace the overhead contact line wire.

[0169] Finally, as shown in FIG. 27(C), the male threaded body 110 is tightened to clamp the trolley wire T between the first clamping portion 402a and the second clamping portion 403a (FIG. 37(A)(st3)(st4)).

[0170] Furthermore, the above-mentioned installation procedure using the overhead contact metal fittings for train tracks can be applied to the male-threaded body, whether it is male-threaded body 10 which does not have both right-handed and left-handed threads, or male-threaded body 110 which has right-handed and left-handed threads.

[0171] When using a male-threaded body 110 having a right-hand thread portion and a left-hand thread portion, the female-threaded body 50 can be further used to prevent the male-threaded body 110 from loosening. In this case, for example, the female-threaded body 50 may be attached to the guide portion 407 of the second clamping body 403 in advance at the time of shipment from a factory, or the female-threaded body 50 may be attached to the guide portion 407 of the second clamping body 403 at the installation site of the trolley line track metal fitting.

[0172] FIG. 37(B) shows the procedure for clamping the trolley wire T in a conventional curved pulley.

[0173] In the conventional curved pull fitting 900, the ear 2400 is composed of ear pieces (2402, 2403), bolts (2410, 2440), and a ring (2430). As disclosed in Patent Document 2 (see Figs. 5 to 7), in order to connect the ear mounting fitting 950 to the ear 2400, the ears 2402 and 2403 are fastened with the bolts 2410 to clamp the trolley wire T (Fig. 37(B)(st1)(st2)), and then the ear mounting fitting 950 and the ears (2402, 2403) are fastened with the ring 2430 and the bolts 2440 (Fig. 37(B)(st3) to (st6)). Therefore, at least two bolt fastening operations were required. Furthermore, the main body parts (2402 and 2403) of the ear 2400 must be inserted upward from below the annular member 951, and in terms of work, it is necessary to hold the main body parts (2402 and 2403) inserted from below with one hand while using the other hand to screw the ring (2430) onto the upper part of the main body part protruding from above the annular member 951, making the work complicated and requiring the use of both hands. On the other hand, with the trolley line fitting 400 of this embodiment, as described above, the bolt tightening operation is performed only once to clamp the trolley wire T, and it is only necessary to pass the first member 421 of the first clamping body 402 over the annular member 951, and there is no need to keep holding the first member 421 with one hand. This reduces the need for complicated operations using both hands as in the conventional product, and makes it possible to improve workability.

[0174] Next, a procedure for attaching the overhead contact line fitting 400 and the ear mounting fitting 950 (see FIG. 32) of the curved pull fitting 900 will be described with reference to FIG. 38(A). For example, this attachment procedure may be carried out at a factory when the overhead contact line fitting 400 is attached to the ear mounting fitting 950 of the curved pull fitting 900 before being shipped from the factory.

[0175] The difference between the installation procedure shown in Fig. 37(A) and that for installing the overhead contact line fitting 400, the trolley wire T, and the ear mounting fittings for the curved pull-out fitting 900 is that the trolley wire T is clamped in Fig. 37(A)(st2), but not in Fig. 38(A)(st2). The other installation procedures are the same as those in Fig. 37(A). Figure 38(B) shows the procedure for attaching a conventional overhead contact wire fitting 2400 for train tracks to an ear mounting fitting 950 of a curved pull-out fitting 900. The difference from Figure 38(B) is that the trolley wire T is clamped in Figure 37(B)(st1), but the trolley wire T is not clamped in Figure 38(B). The other attachment procedures are the same as those in Figure 37(B).

[0176] Therefore, in the procedure for attaching the ear mounting bracket 950 of the train track overhead line fitting 400 and the curved pull fitting 900, the bolt tightening work is performed only once to clamp the contact wire T, making it possible to improve workability compared to the conventional train track overhead line fitting 2400. Furthermore, it is only necessary to pass first member 421 of first clamping body 402 over annular member 951, and there is no need to continue holding first member 421 with one hand. Therefore, it is possible to reduce the cumbersome work that requires the use of both hands as in the conventional product.

[0177] Next, the procedure for replacing the contact wire T in the overhead contact line fitting 400 will be described with reference to Fig. 39(A). For example, the procedure for replacing the contact wire or installing a new one using the curved pull fitting 900 to which the overhead contact line fitting 400 is connected is shown. Basically, it is the same as the installation procedure in Fig. 37(A)(st2) to (st4), and the bolt tightening work is done only once to clamp the contact wire T (Fig. 39(A)(st2)).

[0178] On the other hand, in the conventional overhead contact wire fitting 2400 for train tracks, in order to clamp the trolley wire T with the ear pieces 2402 and 2403, the ears 2402 and 2403 are fastened with the bolts 2410 to clamp the trolley wire T (FIG. 39(B)(st1)(st2)), and then the ear mounting fitting 950 and the ears (2402, 2403) are fastened with the ring 2430 and the bolts 2440 (FIG. 39(B)(st3) to (st6)). Therefore, the bolt fastening work is required at least two times.

[0179] Therefore, in procedures such as replacing the trolley wire T in the overhead contact line fitting 400, the bolt tightening work is only required once to clamp the trolley wire T, making it possible to improve workability compared to the conventional overhead contact line fitting 2400. Furthermore, it is only necessary to pass first member 421 of first clamping body 402 over annular member 951, and there is no need to continue holding first member 421 with one hand. Therefore, it is possible to reduce the cumbersome work that requires the use of both hands as in the conventional product.

[0180] [Fifth embodiment] FIG. 29(A) is a diagram showing an overhead contact metal fitting 400 for an electric rail track according to the fifth embodiment.

[0181] In this embodiment, the electric rail fitting 400 described in the fourth embodiment will be used for explanation. As shown in Fig. 29(A), this embodiment differs from the electric rail fittings in the first to fourth embodiments in that the first clamping portion 402a and the second clamping portion 403a that clamp the trolley wire T have a configuration in which the mutual clamping directions are inclined at a predetermined angle around the axis of the trolley wire T in accordance with the cant angle. Note that in this embodiment, the electric rail fitting 400 will be described using the curved pull fitting 900 as an example, but is not limited to this. For example, this configuration can be applied to electric rail overhead line fittings including hanger ears that clamp the trolley wire T, connectors, etc. In this embodiment, the same components as those in the first to fourth embodiments are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.

[0182] Fig. 29(B) shows a trolley wire T with a detection wire dl embedded inside to detect the progress of wear of the trolley wire T. The progress of wear of the trolley wire T is detected by passing an electric current through the detection wire dl made of a metal wire during nighttime inspections, etc.

[0183] More specifically, friction between the trolley wire T and the train's pantograph P causes wear at the lower surface bs vertically below the trolley wire T. As wear progresses from the lower portion of the trolley wire, the detection wire dl becomes exposed from the trolley wire T or breaks, making it impossible to detect the current value or making the current value unstable. The progress of wear is detected based on this situation. Note that the detection wire dl is not limited to a metal wire, and optical fiber, etc. may be used. In the case of optical fiber, an optical pulse signal is irradiated onto the optical fiber, and the progress of wear is detected based on the situation.

[0184] In curved sections of railway tracks, the outer rail is made higher than the inner rail, and a cant is provided due to the difference in height between the top surfaces of the two rails. In curved sections with this cant, as shown in Figure 29(C), the pantograph P of the train is inclined relative to the horizontal and contacts the upper part of the contact wire T above the lower surface bs. Meanwhile, the lower surface bs of the contact wire T is installed facing vertically downward, regardless of the cant, even in curved sections. Therefore, the pantograph P slides against the surface part of the contact wire T (the surface part from the vertical lower to the upper part of the contact wire T) that is close to the detection wire dl. Therefore, in sections with a cant, the detection wire dl is exposed or broken earlier, and the contact wire T may need to be replaced earlier.

[0185] In order to solve the above-mentioned problems, as shown in FIG. 29(A), the trolley line fitting 400 has a first clamping portion 402a and a second clamping portion 403a that clamp the trolley wire T, and the mutual clamping directions are inclined at a predetermined angle around the axis of the trolley wire T in accordance with the cant angle.

[0186] More specifically, the first clamping portion 402a and the second clamping portion 403a are configured to be inclined at a predetermined angle θ with respect to the horizontal around the axis of the contact wire in accordance with the cant angle with respect to the mutual clamping direction, i.e., the axis C of the trolley line fitting 400. This allows the underside bs of the trolley wire T to be positioned close to and parallel to the pantograph P, making it possible to extend the life of the trolley wire T compared to overhead line fittings for train tracks that do not have this configuration.

[0187] In the above first to fifth embodiments, the overhead contact line fitting (1, 100, 300, 350, 400) is provided with the receiving portion (5, 15, 405) capable of receiving the insertion portion (6, 16, 406), thereby making it possible to increase the rigidity against the shear force that may occur between the first clamping body and the second clamping body that constitute the overhead contact line fitting. However, the overhead contact line fitting (1, 100, 300, 350, 400) may not have these configurations. For example, the overhead contact wire fitting (1, 100, 300, 350, 400) for clamping the overhead contact wire CA for the overhead contact wire includes an externally threaded body (110) having an external thread portion (130b) formed by forming a first helical groove (133a) set at an appropriate lead angle and / or lead direction and a second helical groove (133b) set at a lead angle and / or lead direction different from that of the first helical groove (133a) so as to overlap with the first helical groove (133a) in the same region on the outer circumferential surface of the shaft portion, and an insertion hole (2c, 402a) into which the first clamping portion (2a, 402a) and the externally threaded body (110) can be inserted. The screw thread is provided with a first clamping body (302, 352, 402) having a first clamping portion (3a, 403a) and a second clamping body (3, 303, 353, 403) having a first female thread portion (11, 411) formed with a first helical thread (12, 412) that can be screwed into one of the first helical groove (133a) or the second helical groove (133b) of the male-threaded body (110), and a female-threaded body (50) having a second female thread portion (53) formed with a second helical thread (54) that can be screwed into the other of the first helical groove (133a) or the second helical groove (133b) of the male-threaded body (110). The first female thread portion (11, 411) and the second female thread portion (53) are screwed into the male-threaded portion (130b) of the male-threaded body (110). According to the overhead contact wire fitting for train tracks having the above configuration, loosening of the screw body can be prevented.

[0188] As described above, the components of the first to fifth embodiments described above can be combined with each other as long as there is no contradiction. In addition, the first clamping body, the second clamping body, the male threaded body, and the female threaded body constituting the overhead contact line metal fitting in each embodiment can be made of metal materials such as iron-based materials and non-ferrous materials, resin materials, reinforced resin materials, or combinations of these materials. [Explanation of symbols]

[0189] 1, 100, 300, 350, 400, 1000, 1400...Overhead line fittings for electric train tracks, 2, 302, 352, 402, 1002, 1402...First clamping body, 2a, 402a, 1002a...First clamping part, 2b, 402b, 1002b...Main body, 2c, 402c, 1002c...Insertion hole, 2d...Groove, 2e...Wall, 3, 303, 353, 403, 1003...Second clamping body, 3a, 403a, 1003a...Second clamping part, 3b, 403b, 1003b...Main body, 3c, 403c, 1 003c...insertion hole, 3d...positioning portion, 4, 404...connection portion, 5, 15, 405...accommodating portion, 5a, 405a...bottom surface, 5b, 405b...inner peripheral wall portion, 5c, 405c...tip edge, 6, 16, 406...insertion portion, 6b, 406b...inner peripheral wall portion, 6c, 406c...tip edge, 7, 70, 407, 1007, 1407...guide portion, 7a, 70a, 407a, 1007a...recessed groove, 7b, 70b, 407b, 1007b...opening, 7c...stopper, 9...elastic member, 10, 1 10, 1010... male threaded body, 11, 411, 1011... first female threaded portion, 12, 412, 1012... first helical rib, 20, 120, 1020... head, 30, 130, 1030... shaft portion, 30a... cylindrical portion, 30b... male threaded portion, 31... first helical groove, 50, 1050... female threaded body, 50a... short side portion, 50b... long side portion, 51... through hole, 52... plate piece, 52a... tip portion, 53... second female threaded portion, 54... second helical rib, 55... plate-shaped member, 55a... handle portion , 130b, 1030b... male thread portion, 131a, 1031a... right-hand thread, 131b, 1031b... left-hand thread, 133a, 1033a... first spiral groove, 133b, 1033b... second spiral groove, 401, 421, 1421... first member, 404a, 1404a... small diameter portion, 404b, 1404b... large diameter portion, 422... receiving portion, 425... second member, 425a... recess, 425b... insertion hole, 430, 930, 1430... bolt hole, 700... hanger ear, 701... ear,710 hanger bar, 720 hook portion, 800 connector metal fitting, 801 ear, 810 lead wire, 820 loop portion, 900 curved pull fitting, 901 ear, 910 arm member, 920 support member, 950 ear mounting metal fitting, 951 annular member, 951a lower end surface, 96 0···washer, 1002d, 1003d···connecting portion, 1002e, 1003e···contact member, 1007d···engagement portion, 1020a···hexagonal hole, 1050c···semicircular portion, 1060···shaft body, 1435···opening portion, 1436···hollow portion, 1440a···inner wall portion, 1440b···bottom portion, 1450···drain hole,

Claims

1. A metal fitting for an electric rail that is positioned between a pair of clamping parts including a first clamping part and a second clamping part and clamps an electric rail, a male-threaded body having a male-threaded portion formed with a first helical groove set to an appropriate lead angle and / or lead direction; A first clamping body having the first clamping portion and a storage portion; a second clamping body having the second clamping portion, an insertion portion having an insertion hole into which the male screw can be inserted and which can be accommodated in the accommodation portion, and a first female screw portion formed with a first helical thread which is coaxial with the insertion hole and can be screwed into the first helical groove, 4. The overhead contact metal fitting for a train track, comprising: a first female threaded portion and a second female threaded portion, the first female threaded portion and the second male threaded portion being threadably rotated relative to each other to allow the insertion portion to advance and retreat within the accommodating portion.

2. A metal fitting for an electric rail that is positioned between a pair of clamping parts including a first clamping part and a second clamping part and clamps an electric rail, a male-threaded body having a male-threaded portion formed with a first helical groove set to an appropriate lead angle and / or lead direction; a first clamping body having an insertion hole into which the male screw portion can be inserted and an insertion portion that can be accommodated in an accommodating portion formed in a second clamping body; a second clamping body having the second clamping portion and a first female screw portion in which a housing portion is formed and a first helical thread is formed coaxially with the insertion hole and capable of screwing into the first helical groove; the male threaded portion and the first female threaded portion are screwed relative to each other, so that the insertion portion can be advanced and retreated within the accommodating portion.

3. Further provided is an internally threaded body that can be screwed into the externally threaded body, The first spiral groove is formed in the male thread portion of the male-threaded body, and a second spiral groove set to a lead angle and / or lead direction different from that of the first spiral groove is formed in the same region on the outer circumferential surface of the shank, the second spiral groove being overlapped with the first spiral groove, The first female thread portion has a first helical groove that can be screwed into one of the first helical groove or the second helical groove of the male threaded body, The female-threaded body has a second female-threaded portion formed with a second helical groove capable of being screwed into the other of the first helical groove or the second helical groove of the male-threaded body, 3. The overhead contact wire fitting according to claim 1, wherein, when the insertion portion is accommodated in the accommodation portion, the first female threaded portion and the second female threaded portion are screwed into the male threaded portion of the male-threaded body, respectively.

4. The female-threaded body is a plate-like member having a through hole, The second female threaded portion of the female threaded body is composed of one or more plate pieces arranged protruding from the through hole toward the axis of the second female threaded portion, 4. The overhead contact wire fitting for a train track according to claim 3, wherein a tip end of the plate piece forms the second helical streak having an intermittent or continuous spiral shape, and the second helical streak formed by the tip end of the plate piece has a finite inclination angle with respect to a lead angle of the first helical streak of the first female thread portion formed in the insertion hole of the second clamping body.

5. The second clamping body has a guide portion that detachably guides the female-threaded body, 5. The overhead contact wire fitting for a train track according to claim 4, wherein the first female threaded portion and the second female threaded portion of the female threaded body can be screwed into the male threaded portions of the male threaded body, respectively, in a state where the female threaded body is guided by the guide portion.

6. A metal fitting for an electric rail that is positioned between a pair of clamping parts including a first clamping part and a second clamping part and clamps an electric rail, a male-threaded body having a male-threaded portion formed by overlapping a first helical groove set at an appropriate lead angle and / or lead direction and a second helical groove set at a lead angle and / or lead direction different from that of the first helical groove within the same region on the outer circumferential surface of a shaft portion; A female-threaded body that can be screwed into the male-threaded body; A first clamping body having the first clamping portion and an insertion hole into which the male screw portion can be inserted; a second clamping body having the second clamping portion, an insertion hole into which the male threaded portion can be inserted, and a guide portion to which the female threaded body is attached. The insertion hole of the second clamping body has a first female thread portion formed with a first helical rib that can be screwed into one of the first helical groove or the second helical groove of the male-threaded body, The female-threaded body has a second female-threaded portion formed with a second helical groove capable of threadably engaging with the other of the first helical groove or the second helical groove of the male-threaded body, and with the female-threaded body attached to the guide portion, the male-threaded portion and the first female-threaded portion are screwed relative to each other, so that the first female-threaded portion and the second female-threaded portion are screwed into the male-threaded portion of the male-threaded body, respectively.

7. 7. The overhead contact wire fitting according to claim 5, wherein the second clamping body further comprises an engaging portion that engages with the female-threaded body when the female-threaded body is guided by the guiding portion.

8. A metal fitting for an electric rail that is positioned between a pair of clamping parts including a first clamping part and a second clamping part and clamps an electric rail, a male-threaded body having a male-threaded portion formed with a first helical groove set to an appropriate lead angle and / or lead direction; A first clamping body including the first clamping portion and a first main body portion having an accommodation portion and an insertion hole into which the male screw portion can be inserted, a second clamping body including the second clamping portion and a second main body portion having an insertion portion that can be accommodated in the accommodation portion and an insertion hole into which the male screw portion can be inserted, The first clamping body is composed of a first member and a second member, the first member having the accommodating portion formed on one end surface side and a receiving portion formed on the other end surface side, The second member has a recess formed therein that fits with the receiving portion, a first female screw portion is formed in the insertion hole of the second main body portion of the second clamping body, the first female screw portion being formed with a first helical thread that is coaxial with the insertion hole and can be screwed into the first helical groove; the insertion portion of the second clamping body is configured so that, in a state where the insertion portion of the second clamping body is accommodated in the accommodating portion formed by fitting together the first member and the second member, the insertion portion can be advanced and retreated within the accommodating portion by relatively screwing the male threaded portion and the first female threaded portion.

9. A metal fitting for an electric rail that is positioned between a pair of clamping parts including a first clamping part and a second clamping part and clamps an electric rail, a male-threaded body having a male-threaded portion formed with a first helical groove set to an appropriate lead angle and / or lead direction; a first clamping body having the first clamping portion and a first main body portion having an insertion portion that can be accommodated in an accommodating portion formed in a second clamping body and an insertion hole into which the male screw portion can be inserted; a second clamping body including the second clamping portion and a second main body portion having a housing portion capable of housing the insertion portion and an insertion hole into which the male screw portion can be inserted, the first clamping body is composed of a first member and a second member, the first member having the insertion portion formed on one end surface side and a receiving portion formed on the other end surface side, The second member has a recess formed therein that fits with the receiving portion, a first female screw portion is formed in the insertion hole of the second main body portion of the second clamping body, the first female screw portion being formed with a first helical thread that is coaxial with the insertion hole and can be screwed into the first helical groove; the insertion portion of the first clamping body is configured so that, in a state in which the first member and the second member are fitted together and the first clamping body is accommodated in the accommodating portion, the male threaded portion and the first female threaded portion are screwed relative to each other, thereby allowing the insertion portion to advance and retreat within the accommodating portion.

10. The first member has a substantially cylindrical connecting portion at one end side of the first main body portion that is connected to the annular member, and a first clamping portion at the other end side, the connecting portion is composed of a small diameter portion having an outer diameter slightly smaller than the inner diameter of the annular member and a large diameter portion having an outer diameter larger than the inner diameter of the annular member, 10. The overhead contact wire fitting for a train track according to claim 8 or 9, characterized in that, when the annular member is present at the connection portion, the annular member is prevented from coming off the small diameter portion in a state in which the first member and the second member are fitted together and / or the first member and the second clamping body are combined.

11. 10. The overhead contact metal fitting for a train track according to claim 8, wherein the connection portion has a hollow portion therein that opens from an upper end side of the large diameter portion and has a bottom surface at a lower end side.

12. 12. The overhead contact metal fitting for a train track according to claim 11, wherein the connecting portion has a drain hole in a bottom surface of the hollow portion, the drain hole being smaller than the opening formed on the upper end side.

13. A method for mounting an overhead line fitting for use in an electric train line, comprising: a first clamping body including a male-threaded body having a male-threaded portion, an insertion hole into which the male-threaded portion can be inserted, the first clamping body being composed of a first member having a receiving portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second clamping body having an insertion hole formed therein with a female-threaded portion capable of screwing into the male-threaded portion, and an inserting portion capable of being received in the receiving portion, to a mounting fitting for a curved pull fitting, the method comprising the steps of: inserting the first member into an annular member of the mounting fitting; a step of accommodating the insertion portion in the accommodating portion and fitting the second member to the first member in a state in which the large diameter portion of the first member is present on one end side of the annular member and the accommodating portion of the first member is present on the other end side of the annular member; a step of inserting the male threaded body from the first clamping body side and relatively screwing the male threaded portion and the female threaded portion to move the insertion portion back and forth within the accommodation portion, thereby attaching the overhead contact metal fitting for a train track; 1. A method for attaching a catenary metal fitting for a train track, comprising the steps of:

14. A method for attaching an overhead contact line fitting for use in a train track, comprising: a first clamping body having a male threaded body having a male threaded portion, an insertion hole into which the male threaded portion can be inserted, the first clamping body being composed of a first member having an insertion portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second clamping body having a recess into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female threaded portion capable of screwing into the male threaded portion, and having a receiving portion capable of receiving the insertion portion, to a mounting bracket for a curved pull fitting, the method comprising the steps of: inserting the first member into an annular member of the mounting fixture; a step of fitting the second member into the first member, with the large diameter portion of the first member being present on one end side of the annular member and the insertion portion of the first member being present on the other end side of the annular member, the insertion portion being accommodated in the accommodation portion and the second member being fitted into the first member; a step of inserting the male threaded body from the first clamping body side and screwing the male threaded portion and the female threaded portion relative to each other to move the insertion portion back and forth within the accommodation portion, thereby attaching the overhead line fitting for a train track; 1. A method for attaching a catenary metal fitting for a train track, comprising the steps of:

15. A method for mounting an overhead contact line fitting for use in a train line, comprising: a first clamping body having a male threaded body having a male threaded portion, an insertion hole into which the male threaded portion can be inserted, the first clamping body being composed of a first member having a receiving portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second clamping body having a recess into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female threaded portion capable of screwing into the male threaded portion, and having an insert portion that can be received in the receiving portion, to a mounting fitting for a curved pull fitting, the method comprising the steps of: inserting the first member into an annular member of the mounting fixture; a step of clamping an overhead wire between the first clamping portion and the second clamping portion by accommodating the insertion portion in the accommodating portion and fitting the second member into the first member in a state in which the large diameter portion of the first member is present on one end side of the annular member and the accommodating portion of the first member is present on the other end side of the annular member with the annular member sandwiched therebetween; a step of inserting the male threaded body from the first clamping body side and screwing the male threaded portion and the female threaded portion relative to each other to move the insertion portion back and forth within the accommodation portion, thereby attaching the overhead line fitting for a train track; 1. A method for attaching a catenary metal fitting for a train track, comprising the steps of:

16. A method for mounting an overhead line fitting for use in an electric train line, comprising: a first clamping body having an externally threaded body having an externally threaded portion, an insertion hole into which the externally threaded portion can be inserted, the first clamping body being composed of a first member having an insertion portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second clamping body having a recess into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female threaded portion capable of screwing into the externally threaded portion, and having a receiving portion capable of receiving the insertion portion, to a mounting bracket for a curved pull fitting, the method comprising the steps of: inserting the first member into an annular member of the mounting fixture; a step of clamping an overhead wire for a train track between the first clamping portion and the second clamping portion, in a state in which the large diameter portion of the first member is present at one end side of the annular member and the insertion portion of the first member is present at the other end side of the annular member with the annular member sandwiched therebetween, the receiving portion of the second clamping body receiving the insertion portion and fitting the second member into the first member; a step of inserting the male threaded body from the first clamping body side and relatively screwing the male threaded portion and the female threaded portion to move the insertion portion back and forth within the accommodation portion, thereby attaching the overhead contact metal fitting for a train track; 1. A method for attaching a catenary metal fitting for a train track, comprising the steps of:

17. a first clamping body having a male threaded portion, an insertion hole into which the male threaded portion can be inserted, the first member having a housing portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second member having a recess into which the receiving portion fits; and a second clamping body having an insertion hole formed therein with a female threaded portion that can be screwed into the male threaded portion, the first clamping body having a first member having a housing portion formed on one end surface side and a receiving portion formed on the other end surface side, the second clamping body having an insertion portion that can be accommodated in the housing portion, the first member has a generally cylindrical connection portion connected to an annular member, the connection portion having a small diameter portion having an outer diameter slightly smaller than the inner diameter of the annular member and a large diameter portion having an outer diameter larger than the inner diameter of the annular member; and inserting the first member from above the annular member until the large diameter surface of the first member abuts against an upper end surface of the annular member; a step of accommodating the insertion portion of the second clamping body in the accommodating portion of the first member and fitting the second member to the first member; a step of inserting the male threaded body from the first clamping body side and screwing the male threaded portion and the female threaded portion relative to each other to move the insertion portion forward and backward within the accommodation portion, thereby attaching the overhead contact metal fitting for a train track; 1. A method for attaching a catenary metal fitting for a train track, comprising the steps of:

18. a first clamping body having a male threaded portion and an insertion hole into which the male threaded portion can be inserted, the first member having an insertion portion formed on one end surface side and a receiving portion formed on the other end surface side, and a second member having a recess into which the receiving portion fits; a second clamping body having an insertion hole formed therein with a female threaded portion that can be screwed into the male threaded portion, and having a housing portion that can house the insertion portion; the first member has a generally cylindrical connection portion connected to an annular member, the connection portion having a small diameter portion having an outer diameter slightly smaller than the inner diameter of the annular member and a large diameter portion having an outer diameter larger than the inner diameter of the annular member; and inserting the first member from above the annular member until the large diameter surface of the first member abuts against an upper end surface of the annular member; a step of accommodating the insertion portion of the first member in the second clamping body accommodating portion and fitting the second member to the first member; a step of inserting the male threaded body from the first clamping body side and screwing the male threaded portion and the female threaded portion relative to each other to move the insertion portion forward and backward within the accommodation portion, thereby attaching the overhead contact metal fitting for a train track; 1. A method for attaching a catenary metal fitting for a train track, comprising the steps of:

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