Drum and method for storing railway wiring
The drum design with a J-bolt fixation method addresses the safety issue of lost nuts and washers by securely attaching the trolley wire end to the flange plate, enhancing safety and ease of handling during installation and removal.
Patent Information
- Application Number
- JP2024034640
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-07
- Publication Date
- 2025-09-19
AI Technical Summary
Existing methods for fixing the end of a trolley wire to a drum using a U-bolt are prone to losing nuts and washers during the removal process, posing a safety risk during contact wire installation work.
A drum design featuring a cylindrical body with flange plates and a J-bolt that secures the trolley wire end to the flange plate through a through-hole, allowing the nut to be tightened from the outside, thereby preventing the loss of fixing parts.
The J-bolt fixation method reduces the risk of losing nuts and washers, ensuring safer and easier handling of trolley wires during installation and removal.
Smart Images
Figure 2025136271000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a drum and a method for storing railway overhead wires. [Background technology]
[0002] Conventionally, a method for fixing the end of a trolley wire to a drum using a bolt has been known (see Patent Document 1). According to the method described in Patent Document 1, the end of the trolley wire on the winding start side is fixed to the flange plate of the drum by a U-bolt. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Japanese Patent Application Publication No. 63-31982 Summary of the Invention [Problem to be solved by the invention]
[0004] However, a fixing method using a U-bolt, such as the method described in Patent Document 1, is not suitable for fixing the end of a trolley wire at its end. When extending a trolley wire wound on a drum, the fixed end of the trolley wire at its end is removed from the drum flange, and the trolley wire is pulled out from the drum. At this time, if the end of the trolley wire is fixed with a U-bolt, it is necessary to remove the nut tightened on the U-bolt and pull the U-bolt out of the drum flange.
[0005] Therefore, there is a risk of dropping and losing nuts, washers, U-bolts, etc. during work. In recent years, strict attention has been paid to preventing parts from falling onto the tracks during contact wire installation work, and it is considered unacceptable for anything to be lost.
[0006] The object of the present invention is to provide a drum that can fix the end of a railway overhead wire, such as a trolley wire, on a flange plate with a bolt, thereby reducing the risk of fixing parts such as nuts falling off during work, and a method for storing railway overhead wire using the drum. [Means for solving the problem]
[0007] In order to solve the above-mentioned problems, the present invention provides a drum for storing railway overhead wires, such as contact wires, feeder wires, or suspension wires, comprising a cylindrical body for winding the railway overhead wire, a first flange plate and a second flange plate provided on both sides of the body, and a J-bolt for fixing the tip portion of the railway overhead wire at the end of the winding to the inside surface of the first flange plate, wherein the first flange plate has a through-hole passing through it in the thickness direction, and the J-bolt is attached to the first flange plate by passing its long threaded portion through the through-hole from the inside of the first flange plate and tightening a nut onto the thread from the outside of the first flange plate.
[0008] Furthermore, for the purpose of solving the above-mentioned problems, the present invention provides a method for storing railway overhead wires, such as contact wires, feeder wires, or suspension wires, in a drum, the method comprising: a winding step of winding the railway overhead wire around the cylindrical body of the drum; and a fixing step of using a J-bolt to fix the end portion of the railway overhead wire on the inner surface of the first of the drum's first and second flange plates provided on both sides of the body, the first flange plate having a through-hole passing through in the thickness direction thereof; and in the fixing step, the long threaded portion of the J-bolt is passed through the through-hole from the inside of the first flange plate, and a nut is tightened onto the threads from the outside of the first flange plate, thereby sandwiching and fixing the end portion of the railway overhead wire between the J-bolt and the first flange plate. [Effects of the Invention]
[0009] According to the present invention, it is possible to provide a drum in which the end of the winding side of railway overhead wire such as a trolley wire can be fixed to a flange plate with a bolt, thereby reducing the risk of fixing parts such as nuts falling off during work, and a method for storing railway overhead wire using the drum. [Brief explanation of the drawings]
[0010] [Figure 1] 1(a) and 1(b) are front views of a drum according to an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged perspective view of the drum showing the area around the tip of the trolley wire on the winding end side, which is fixed to the inner surface of the flange plate by a J bolt. [Figure 3] Figure 3 is an external view of a J-bolt. [Figure 4] 4(a) and (b) are cross-sectional views of the area around the part of the flange where the J bolt is attached. [Figure 5] 5(a) and (b) are cross-sectional views of the area around the part of the flange where the J bolt is attached, when the flange has holes on the inside surface. [Figure 6] 6(a) and 6(b) are cross-sectional views of the area around the part of the flange where the J bolt is attached, when the through-hole has a large diameter portion on the outside of the flange. DETAILED DESCRIPTION OF THE INVENTION
[0011] 1(a) and (b) are front views of a drum 1 according to an embodiment of the present invention. Fig. 1(a) shows the drum 1 in a state where a trolley wire 15 is not wound around it, and Fig. 1(b) shows the drum 1 in a state where a trolley wire 15 is wound around it.
[0012] The drum 1 is a drum for storing the trolley wire 15, and includes a cylindrical body 10 around which the trolley wire 15 is wound, two flange plates 11a and 11b which are disk-shaped plates provided on both sides of the body 10, and a J-bolt (J-shaped bolt) 12 for fixing a tip portion 150 of the trolley wire 15 at the end of the winding to the inner surface 111 of the flange plate 11a. Here, of the two flange plates 11a and 11b, the one to which the tip portion 150 of the trolley wire 15 at the end of the winding is fixed is called flange plate 11a, and the other is called flange plate 11b.
[0013] Fig. 2 is a perspective view of the drum 1, enlarging the area around the tip portion 150 on the winding end side of the trolley wire 15, which is fixed to the inner surface 111 of the flange plate 11a by the J bolt 12. Note that in Fig. 2 and other figures, illustration of irregularities on the surface of the trolley wire 15, such as ear grooves, is omitted. In the example shown in Fig. 2, the tip portion 150 is fixed using one J bolt 12, but the tip portion 150 may be fixed using two or more J bolts 12.
[0014] As shown in Figure 2, in order to prevent the tip portion 150 at the end of the trolley wire 15 from unintentionally coming off the J bolt 12, the tip portion 150 may be fixed to the flange plate 11a by the J bolt 12 and then bent by bending.
[0015] Furthermore, when bending the trolley wire 15 is not desirable, such as when the trolley wire 15 incorporates an optical fiber as a wear detection line, the tip portion 150 does not need to be bent after being fixed to the flange plate 11a by the J bolt 12. In that case, two or more J bolts 12 may be used to more strongly fix the tip portion 150 to the flange plate 11a.
[0016] The tip of the trolley wire 15 on the winding start side is pulled out to the outside through a hole provided in the flange plate 11 and fixed to the outer surface of the flange plate 11, for example.
[0017] 3 is an external view of J-bolt 12. J-bolt 12 has a long portion 121 provided with threads 122, and a short portion 123 that is continuous with long portion 121, folded back at folding back portion 124, and is shorter than long portion 121.
[0018] 4(a) and (b) are cross-sectional views of the area of flange plate 11a where J bolt 12 is attached. Flange plate 11a has a through-hole 113 that penetrates the thickness direction, for passing long portion 121 of J bolt 12 through. J bolt 12 is attached to flange plate 11a by passing long portion 121 through through-hole 113 from the inside of flange plate 11a and tightening nut 13 onto thread 122 from the outside of flange plate 11a. Typically, a washer 14 is used between flange plate 11a and nut 13 when tightening nut 13.
[0019] As shown in Figure 4(a), when the tip of the short portion 123 contacts the inner surface 111 of the flange plate 11a and the nut 13 contacts the outer surface 112 of the flange plate 11a via the washer 14, and the nut 13 is tightened until the J bolt 12 is fixed to the flange plate 11a, the tip portion 150 of the trolley wire 15 passed inside the J bolt 12 (the position surrounded by the long portion 121, the short portion 123, and the folded portion 124) is clamped and fixed between the J bolt 12 and the flange plate 11a.
[0020] 4(b) shows a state in which the nut 13 has been loosened to remove the tip portion 150 of the trolley wire 15 from the J-bolt 12. As shown in FIG. 4(b), the J-bolt 12 preferably has a shape that allows the tip portion 150 of the trolley wire 15 to be removed from the J-bolt 12 without removing the loosened nut 13 from the J-bolt 12.
[0021] More specifically, it is preferable that long portion 121 has a length sufficient relative to the thickness of flange plate 11a, the length of short portion 123, and the diameter of trolley wire 15 so that the gap between the tip of short portion 123 and flange plate 11a can be expanded to a value greater than the diameter of trolley wire 15 without removing nut 13 from J bolt 12. In this case, it is not necessary to remove loosened nut 13 from J bolt 12 when fixing tip portion 150 of trolley wire 15 with J bolt 12.
[0022] The following table 1 shows the nominal cross-sectional area of the contact wire 15, which is 110 mm 2 (110SQ) and 170mm 2 The following shows an example of the size of the nut 13 and flange plate 11a when the nominal cross-sectional area is 110mm (170SQ). 2 , 170mm 2 The diameters of the contact wire 15 at these positions are approximately 12.4 mm and approximately 15.5 mm, respectively.
[0023] [Table 1]
[0024] In Table 1, "trolley wire size" is the nominal cross-sectional area of trolley wire 15, "flange plate thickness" is the thickness of flange plate 11a, "short portion length" is the length L2 of short portion 123 of J bolt 12, "long portion length" is the length L1 of long portion 121 of J bolt 12, and "folded portion curvature radius" is the curvature radius (if constant) of folded portion 124 of J bolt 12. In the example shown in Table 1, the diameter of J bolt 12 is 6 mm.
[0025] The nominal cross-sectional area of the contact wire 15 is 110 mm 2In this case, the length L2 of the short portion 123 needs to be 19 mm in order to secure the tip portion 150 of the contact wire 15 with the J bolt 12. This is because the sum of the diameter of the contact wire 15 (12.4 mm) and the diameter of the J bolt 12 at the turn-back portion 124 (6 mm) is 18.4 mm, and 19 mm is obtained by rounding up the decimal point of 18.4 mm. In addition, the turn-back portion 124 has the necessary clearance with a curvature radius of 9 mm.
[0026] The nominal cross-sectional area of the contact wire 15 is 170 mm 2 In this case, the length L2 of the short portion 123 needs to be 22 mm in order to secure the tip portion 150 of the contact wire 15 with the J bolt 12. This is because the sum of the diameter of the contact wire 15, 15.5 mm, and the diameter of the J bolt 12 at the turn-back portion 124, 6 mm, is 21.5 mm, and 22 mm is obtained by rounding up the decimal point of 21.5 mm. In addition, the turn-back portion 124 has the necessary clearance with a curvature radius of 9 mm.
[0027] In addition, the nominal cross-sectional area of the contact wire 15 is 110 mm 2 When the thickness of the flange plate 11a is 60 mm, in order to remove the tip portion 150 of the trolley wire 15 from the J bolt 12 without removing the nut 13 from the J bolt 12, the length L1 of the long portion 121 needs to be 100 mm or more, taking into account the 8 mm interference of the nut 13. This is because the sum of the length L2 of the short portion 123 (19 mm), the diameter of the trolley wire 15 (12.4 mm), the thickness of the flange plate 11a (60 mm), and the 8 mm interference of the nut 13 is 99.4 mm, and 100 mm is obtained by rounding up the decimal point of 99.4 mm.
[0028] The nominal cross-sectional area of the contact wire 15 is 170 mm 2When the thickness of the flange plate 11a is 75 mm, in order to remove the tip portion 150 of the trolley wire 15 from the J bolt 12 without removing the nut 13 from the J bolt 12, the length L1 of the long portion 121 needs to be 121 mm or more, taking into account the 8 mm interference of the nut 13. This is because the sum of the length L2 of the short portion 123 (22 mm), the diameter of the trolley wire 15 (15.5 mm), the thickness of the flange plate 11a (75 mm), and the 8 mm interference of the nut 13 is 120.5 mm, and 121 mm is obtained by rounding up the decimal point of 120.5 mm.
[0029] 5(a) and (b) are cross-sectional views of the area around the part of the flange plate 11a where the J bolt 12 is attached, when the flange plate 11a has a hole 114 on the inner surface 111 thereof.
[0030] 5(a) and 5(b), the hole 114 is a hole into which the tip of the short portion 123 of the J bolt 12 is inserted when fixing the tip portion 150 of the trolley wire 15 to the inner surface 111 of the flange plate 11a. The depth of the hole 114 is, for example, about 5 to 25 mm.
[0031] 5(b), it is preferable that J bolt 12 has a shape that allows tip portion 150 of trolley wire 15 to be removed from J bolt 12 without removing nut 13 from J bolt 12. To achieve this, the length of long portion 121 of J bolt 12 is set in consideration of the thickness of flange 11a, the length of short portion 123, the diameter of trolley wire 15, and the depth of hole 114 so that the gap between the tip of short portion 123 and flange 11a can be expanded to be larger than the diameter of trolley wire 15 without removing nut 13 from J bolt 12.
[0032] Table 2 below shows the results for the case where the flange plate 11a has the hole 114 and the nominal cross-sectional area of the contact wire 15 is 110 mm 2 and 170mm 2 The following shows an example of the sizes of the nut 13 and the flange plate 11a when the hole 114 is 5 mm deep.
[0033] [Table 2]
[0034] The flange plate 11a has a hole 114 with a depth of 5 mm, and the nominal cross-sectional area of the contact wire 15 is 110 mm 2 In this case, the length L2 of the short portion 123 needs to be 24 mm in order to secure the tip portion 150 of the contact wire 15 with the J bolt 12. This is because the sum of the diameter of the contact wire 15 (12.4 mm), the diameter of the J bolt 12 at the turn-back portion 124 (6 mm), and the depth of the hole 114 (5 mm) is 23.4 mm, and 24 mm is obtained by rounding up the decimal point of 23.4 mm. In addition, the turn-back portion 124 has the necessary clearance with a curvature radius of 9 mm.
[0035] The flange plate 11a has a hole 114 with a depth of 5 mm, and the nominal cross-sectional area of the contact wire 15 is 170 mm 2 In this case, the length L2 of the short portion 123 needs to be 27 mm in order to secure the tip portion 150 of the contact wire 15 with the J bolt 12. This is because the sum of the diameter of the contact wire 15 (15.5 mm), the diameter of the J bolt 12 at the turn-back portion 124 (6 mm), and the depth of the hole 114 (5 mm) is 26.5 mm, and 27 mm is obtained by rounding up the decimal point of 26.5 mm. In addition, the turn-back portion 124 has the necessary clearance with a curvature radius of 9 mm.
[0036] The flange plate 11a has a hole 114 with a depth of 5 mm, and the nominal cross-sectional area of the trolley wire 15 is 110 mm 2 When the thickness of the flange plate 11a is 60 mm, in order to remove the tip portion 150 of the trolley wire 15 from the J bolt 12 without removing the nut 13 from the J bolt 12, the length L1 of the long portion 121 needs to be 105 mm or more, taking into account the 8 mm interference of the nut 13. This is because the sum of the length L2 of the short portion 123 (24 mm), the diameter of the trolley wire 15 (12.4 mm), the thickness of the flange plate 11a (60 mm), and the 8 mm interference of the nut 13 is 104.4 mm, and 105 mm is obtained by rounding up the decimal point of 104.4 mm.
[0037] The flange plate 11a has a hole 114 with a depth of 5 mm, and the nominal cross-sectional area of the contact wire 15 is 170 mm 2 When the thickness of the flange plate 11a is 75 mm, in order to remove the tip portion 150 of the trolley wire 15 from the J bolt 12 without removing the nut 13 from the J bolt 12, the length L1 of the long portion 121 needs to be 126 mm or more, taking into account the 8 mm interference of the nut 13. This is because the sum of the length L2 of the short portion 123 (27 mm), the diameter of the trolley wire 15 (15.5 mm), the thickness of the flange plate 11a (75 mm), and the 8 mm interference of the nut 13 is 125.5 mm, and 126 mm is obtained by rounding up the decimal point of 125.5 mm.
[0038] Providing the hole 114 can prevent the tip of the short portion 123 from biting into the flange plate 11a when the nut 13 is tightened, thereby preventing distortion of the J bolt 12. In addition, after the tip portion 150 of the trolley wire 15 is fixed, the tip of the short portion 123 can be prevented from moving, which would cause the tip portion 150 of the trolley wire 15 to move.
[0039] It is preferable that the through-hole 113 is closer to the outer edge of the flange plate 11a than the hole 114. In this case, when the tip portion 150 of the trolley wire 15 is fixed by the J-bolt 12, the long portion 121 is located outside the short portion 123. Therefore, when the tip portion 150 of the trolley wire 15 is fixed to the J-bolt 12 or when the tip of the short portion 123 is pulled out of the hole 114 to remove it from the J-bolt 12, the long portion 121 acts as a stopper, and its rigidity prevents the tip portion 150 of the trolley wire 15 from jumping out toward the outside of the flange plate 11a.
[0040] 6(a) and (b) are cross-sectional views of the area around the part of the flange plate 11a where the J bolt 12 is attached, when the through-hole 113 has the large diameter part 115 on the outside of the flange plate 11a.
[0041] When the tip portion 150 of the trolley wire 15 is fixed to the inner surface 111 of the flange plate 11a, at least a part of the nut 13 fits into the large diameter portion 115. When the washer 14 is used, when the tip portion 150 of the trolley wire 15 is fixed to the inner surface 111 of the flange plate 11a, the entire washer 14 and at least a part of the nut 13 fit into the large diameter portion 115. Therefore, the large diameter portion 115 has a size large enough to accommodate the nut 13 and the washer 14.
[0042] Table 3 below shows the results of the test when the through hole 113 has the large diameter portion 115 and the nominal cross-sectional area of the contact wire 15 is 110 mm 2 and 170mm 2 The following shows an example of the sizes of the nut 13 and the flange plate 11a when the hole 114 is 5 mm deep, and the thickness of the large diameter portion 115 (width in the thickness direction of the flange plate 11a) is 20 mm.
[0043] [Table 3]
[0044] The flange plate 11a has a hole 114 with a depth of 5 mm, the through hole 113 has a large diameter portion 115 with a thickness of 20 mm, and the nominal cross-sectional area of the trolley wire 15 is 110 mm 2 When the thickness of the flange plate 11a is 60 mm, in order to remove the tip portion 150 of the trolley wire 15 from the J bolt 12 without removing the nut 13 from the J bolt 12, the length L1 of the long portion 121 needs to be 85 mm or more, taking into account the 8 mm interference of the nut 13. This is because the sum of the length L2 of the short portion 123 (24 mm), the diameter of the trolley wire 15 (12.4 mm), the thickness of the flange plate 11a (60 mm), and the interference of the nut 13 (8 mm) minus the thickness of the through hole 113 (20 mm) is 84.4 mm, and 85 mm is obtained by rounding up the decimal point of 84.4 mm.
[0045] The flange plate 11a has a hole 114 with a depth of 5 mm, the through hole 113 has a large diameter portion 115 with a thickness of 20 mm, and the nominal cross-sectional area of the contact wire 15 is 170 mm 2When the thickness of the flange plate 11a is 75 mm, in order to remove the tip portion 150 of the trolley wire 15 from the J bolt 12 without removing the nut 13 from the J bolt 12, the length L1 of the long portion 121 needs to be 106 mm or more, taking into account the 8 mm interference of the nut 13. This is because the sum of the length L2 of the short portion 123 (27 mm), the diameter of the trolley wire 15 (15.5 mm), the thickness of the flange plate 11a (75 mm), and the interference of the nut 13 (8 mm) minus the thickness of the through hole 113 (20 mm) is 105.5 mm, and 106 mm is obtained by rounding up the decimal point of 105.5 mm.
[0046] By providing large diameter portion 115, it is possible to shorten long portion 121 while maintaining the functionality of J bolt 12. The thickness of large diameter portion 115 (width in the thickness direction of flange plate 11a) is, for example, about 15 to 25 mm.
[0047] In the example shown in FIGS. 6(a) and 6(b), both the hole 114 and the large diameter portion 115 are provided, but only the large diameter portion 115 may be provided.
[0048] According to an embodiment of the present invention, it is possible to provide a trolley wire storage method using the above-mentioned drum 1. The trolley wire storage method according to the embodiment of the present invention includes a winding step of winding a trolley wire 15 around the cylindrical body 10 of the drum 1, and a fixing step of fixing, using a J-bolt 12, a tip portion 150 on the winding end side of the trolley wire 15 to an inner surface 111 of the flange plate 11a of the drum 1, which is provided on both sides of the body 10.
[0049] In the fixing step, the long portion 121 of the J bolt 12, on which the thread 122 is formed, is passed through the through-hole 113 from the inside of the flange plate 11a, and the nut 13 is tightened onto the thread 122 from the outside of the flange plate 11a, thereby sandwiching and fixing the tip portion 150 of the trolley wire 15 between the J bolt 12 and the flange plate 11a. If the flange plate 11a has a hole 114 on the inner surface 111, the tip of the short portion 123 of the J bolt 12 is inserted into the hole 114 in the fixing step. If the through-hole 113 has a large-diameter portion 115 on the outside of the flange plate 11a, at least a part of the nut 13 fits into the large-diameter portion 115 of the through-hole 113 in the fixing step.
[0050] (Effects of the embodiment) Conventionally, the tip end of the trolley wire at the end of its winding is generally fixed to the drum using a U-shaped nail. The U-shaped nail is driven in with a hammer or the like when fixing the end of the trolley wire to the drum, and the U-shaped nail is removed with a crowbar or the like when removing the end of the trolley wire from the drum. In an embodiment of the present invention, by using a J-bolt 12 instead of the U-shaped nail, it is possible to obtain effects such as easier and safer work and reduced damage to the trolley wire due to contact with tools. Furthermore, compared to a U-shaped nail, the J-bolt 12 is less likely to fall off when the tip end 150 of the trolley wire 15 is removed from the drum 1.
[0051] Furthermore, the fixing method using the J bolt 12 has several advantages over the fixing method using a U bolt. For example, when removing the tip portion 150 of the trolley wire 15 from the drum 1, the J bolt 12 does not need to be completely removed from the flange plate 11a as with a U bolt, so there is little risk of the J bolt 12 falling off. Also, the J bolt 12 has fewer nuts 13 for attaching to the flange plate 11a than the U bolt, so there is little risk of the nuts 13 and washers 14 falling off. Furthermore, if the long portion 121 of the J bolt 12 is sufficiently long, the tip portion 150 of the trolley wire 15 can be removed from the J bolt 12 without removing the loosened nuts 13 from the J bolt 12, so there is almost no risk of the J bolt 12, nuts 13, or washers 14 falling off.
[0052] The drum 1 according to the embodiment of the present invention can also store a feeder wire or a catenary wire (including a feeder catenary wire) instead of the trolley wire 15. That is, according to the embodiment of the present invention, it is possible to provide a drum 1 for storing a railway overhead wire, which is a trolley wire 15, a feeder wire, or a catenary wire, and a method for storing a railway overhead wire using the drum 1.
[0053] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiments will be described by using the reference numerals and the like in the embodiments. However, the reference numerals and the like in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiments.
[0054] [1] A drum for storing a railway overhead wire, such as a contact wire (15), a feeder wire, or a suspension wire, comprising: a cylindrical body (10) for winding the railway overhead wire; a first flange plate (11a) and a second flange plate (11b) provided on both sides of the body (10); and a J-bolt (12) for fixing a tip portion (150) of the railway overhead wire on the winding end side to the inner surface (111) of the first flange plate (11a). The first flange plate (11a) has a through hole (113) penetrating through the thickness direction thereof, and the J bolt (12) is attached to the first flange plate (11a) by passing a long portion (121) having a thread (122) through the through hole (113) from the inside of the first flange plate (11a) and tightening a nut (13) onto the thread (122) from the outside of the first flange plate (11a), thereby forming a drum (1).
[0055] [2] The drum (1) described in [1] above, wherein the railway overhead wire is wound around the body (10), and the end portion (150) of the railway overhead wire on the winding end side is sandwiched between the J bolt (12) and the first flange plate (11a) and fixed to the inner surface (111) of the first flange plate (11a).
[0056] [3] The drum (1) according to [1] or [2] above, wherein the first flange plate (11a) has a hole (114) on the inner surface (111) into which the tip of the short portion (123) of the J bolt (12) is inserted when fixing the tip portion (150) of the railway overhead wire to the inner surface (111) of the first flange plate (11a).
[0057] [4] The drum (1) according to the above [3], wherein the through-hole (113) is closer to the outer edge of the first flange plate (11a) than the hole (114).
[0058] [5] The drum (1) according to [1] or [2] above, wherein the tip portion (150) of the railway overhead wire can be removed from the J-bolt (12) without removing the loosened nut (13) from the J-bolt (12).
[0059] [6] The drum (1) described in [1] or [2] above, wherein the through hole (113) has a large diameter portion (115) on the outside of the first flange plate (11a) into which at least a part of the nut (13) enters when the tip portion (150) of the railway overhead wire is fixed to the inner surface (111) of the first flange plate (11a).
[0060] [7] A method for storing a railway overhead wire, such as a contact wire (15), a feeder wire, or a suspension wire, in a drum (1), the method comprising: a winding step of winding the railway overhead wire around a cylindrical body (10) of the drum (1); and a fixing step of fixing a tip portion (150) of the railway overhead wire on the winding end side to an inner surface (111) of a first flange plate (11a) of the drum (1) and a second flange plate (11b) of the drum (1) provided on both sides of the body (10) using a J-bolt (12). The first flange plate (11a) has a through hole (113) penetrating through its thickness direction, and in the fixing step, a long portion (121) of the J bolt (12) having a thread (122) is passed through the through hole (113) from the inside of the first flange plate (11a), a nut (13) is tightened onto the thread (122) from the outside of the first flange plate (11a), and the tip portion (150) of the railway overhead wire is sandwiched and fixed between the J bolt (12) and the first flange plate (11a), in this method for storing a railway overhead wire.
[0061] [8] The method for storing a railway overhead wire according to the above [7], wherein the first flange plate (11a) has a hole (114) on the inner surface (111), and in the fixing step, a tip of the short portion (123) of the J bolt (12) is inserted into the hole (114).
[0062] [9] The method for storing railway overhead wires according to the above [8], wherein the through-hole (113) is closer to the outer edge of the first flange plate (11a) than the hole (114).
[0063]
[10] The method for storing a railway overhead wire according to any one of the above [7] to [9], wherein the J bolt (12) has a shape that allows the tip portion (150) of the railway overhead wire to be removed from the J bolt (12) without removing the loosened nut (13) from the J bolt (12).
[0064]
[11] The method for storing railway overhead wires according to any one of the above [7] to [9], wherein the through hole (113) has a large diameter portion (115) on the outside of the first flange plate (11a), and in the fixing process, at least a part of the nut (13) fits into the large diameter portion (115) of the through hole (113).
[0065] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications are possible within the scope of the gist of the invention. Furthermore, the components of the above embodiments can be combined as desired within the scope of the gist of the invention. Furthermore, the above-described embodiments do not limit the invention according to the claims. Furthermore, it should be noted that not all of the combinations of features described in the embodiments are necessarily essential to the means for solving the problems of the invention. [Explanation of symbols]
[0066] 1 drum 10 Torso 11a, 11b collar plate 111 Inner surface 113 Through hole 114 holes 12 J bolt 121 Long section 122 threads 123 Short section 13 Nut 15 Contact wire 150 Tip part
Claims
1. A drum for storing railway overhead wires, such as contact wires, feeder wires, or suspension wires, a cylindrical body for winding the railway overhead wire; a first flange plate and a second flange plate provided on both sides of the barrel; a J-bolt for fixing a tip end portion of the railway overhead wire on the winding end side to an inner surface of the first flange plate; Equipped with the first flange plate has a through hole penetrating in its thickness direction, The J-bolt is attached to the first flange by passing a threaded elongated portion through the through-hole from the inside of the first flange and tightening a nut onto the threads from the outside of the first flange. drum.
2. The railway overhead wire is wound around the barrel, a tip end portion of the railway overhead wire on the winding end side is sandwiched between the J bolt and the first flange plate and fixed to an inner surface of the first flange plate; The drum of claim 1 .
3. the first flange plate has a hole on its inner surface into which a tip of a short portion of the J bolt is inserted when the tip portion of the railway overhead wire is fixed to the inner surface of the first flange plate; 3. The drum according to claim 1 or 2.
4. the through-hole is closer to the outer edge of the first flange plate than the hole; The drum of claim 3.
5. The tip portion of the railway overhead wire can be removed from the J-bolt without removing the loosened nut from the J-bolt.
3. The drum according to claim 1 or 2.
6. the through hole has a large diameter portion on the outer side of the first flange plate into which at least a part of the nut is inserted when the tip portion of the railway overhead wire is fixed to the inner surface of the first flange plate; 3. The drum according to claim 1 or 2.
7. A method for storing railway overhead wires, which are contact wires, feeder wires, or suspension wires, in a drum, comprising: a winding step of winding the railway overhead wire around the cylindrical body of the drum; a fixing step of fixing a tip portion of the railway overhead wire on a winding end side to an inner surface of the first flange plate of the drum provided on both sides of the body using a J bolt; Including, the first flange plate has a through hole penetrating in its thickness direction, In the fixing step, a long portion of the J bolt on which a thread is provided is passed through the through-hole from the inside of the first flange plate, and a nut is fastened to the thread from the outside of the first flange plate, thereby sandwiching and fixing the tip portion of the railway overhead wire between the J bolt and the first flange plate. How to store railway overhead wires.
8. the first flange plate has a hole in the inner surface; In the fixing step, a tip of a short portion of the J bolt is inserted into the hole. The method for storing railway overhead wires according to claim 7.
9. the through-hole is closer to the outer edge of the first flange plate than the hole; 9. The method for storing railway overhead wires according to claim 8.
10. the J-bolt has a shape that allows the tip portion of the railway overhead wire to be removed from the J-bolt without removing the loosened nut from the J-bolt. The method for storing railway overhead wires according to any one of claims 7 to 9.
11. the through hole has a large diameter portion on the outer side of the first flange plate, In the fixing step, at least a part of the nut is inserted into the large diameter portion of the through hole. The method for storing railway overhead wires according to any one of claims 7 to 9.
Citation Information
Patent Citations
Method of securing terminal end of trolley line in packing drum
JP1988031982A