JP5167511B2 - Tensile device with vernier fittings - Google Patents

Description

  The present invention relates to a tension device provided with a vernier fitting, and particularly relates to a tension device provided with a vernier fitting capable of improving the workability of the slack adjustment work of an overhead power transmission line.

  FIG. 10 is a top view showing a part of the tension insulator for four conductors. The vernier fitting 40 includes a pair of outer plates 41, 41 and an inner plate 42 interposed between the outer plates 41, 41. The outer plates 41 and 41 have a plurality of bolt insertion holes 43 formed at a predetermined pitch on the tip side thereof (see FIG. 12B), and the bolt insertion holes 43 are arranged in a predetermined manner so as to coincide with each other. The base end portions of the parallel clevis links 45 are attached to the parallel clevis link 45 by mounting bolts 44.

  On the other hand, the inner plate 4 has a plurality of positioning holes 46 formed at a predetermined pitch on the front end side (see FIG. 12B), and the positioning holes 46 can communicate with the bolt insertion holes 43. It is interposed between the outer plates 41, 41, and its proximal end is attached to the right-angle clevis link 48 by means of attachment bolts 47. The pitch of the positioning holes 46 is selected to be different from the pitch of the bolt insertion holes 43.

  The vernier fitting 40 having such a configuration can adjust the positions of the outer plates 41 and 41 and the inner plate 42 in the longitudinal direction, and as shown in FIG. 10, a desired bolt insertion hole 43 and a positioning hole. The outer plate 41, 41 and the inner plate 42 are connected to each other by inserting the connecting bolt 49 into 46, and the vernier fitting 40 having a desired length can be obtained. Here, since the bolt insertion holes 43 and the positioning holes 46 are formed at different pitches as described above, the length of the vernier fitting 40 is changed by changing the combination of the bolt insertion holes 43 and the positioning holes 46. Can be changed.

  The vernier fitting 40 is used as a component of a tension device that holds an overhead power transmission line on a support such as a steel tower, and a tension clamp 50 that holds the overhead power transmission line and an insulator (see FIG. (Not shown), and is used to adjust the sag (degree of slackness) of the overhead power transmission line by adjusting its length.

  In the vernier fitting 40, the base end portion of the inner plate 42 is connected to both ends of the double yoke 51 by right angle clevis links 48, and the base end portions of the outer plates 41, 41 are parallel clevis links 45, right angle clevises. It is connected to the proximal end portion of the tension clamp 50 by a link 49 or the like. The tension clamp 50 supports a power transmission line (not shown) on its tip side. Similarly to the above, the vernier fitting 40, the tension clamp 50, and the like are connected to both ends of another two-yoke (not shown) disposed below the two-yoke 51, respectively. Therefore, the tension insulator device shown in FIG. 9 holds four power transmission lines.

  FIG. 11 and FIG. 12A are top views for explaining a method for adjusting the length of the vernier fitting 40. The length of the vernier fitting 40 is adjusted by attaching the adjustment tool 60. The adjustment tool 60 is attached to both ends of the support rod 61 so that the adjustment arms 62 and 63 can swing, and the base end side of the double acting cylinder 64 and the piston rod are attached to one end of each of the pair of adjustment arms 62 and 63. Each of the adjustment arms 62 and 63 is provided with arm engagement holes (arm engagement portions) 66 and 67 at the distal ends thereof. Then, as shown in FIG. 11, the adjustment tool 60 is attached to the vernier fitting 40 from the side (horizontal direction) of the arm engagement holes 66 and 67 through the right angle clevis link 48 and the mounting portion 48a of the parallel clevis link 45, respectively. , 45a by being pivotably attached with pivot bolts 58, 59.

When the piston rod is advanced after the mounting, as shown in FIG. 12A, the adjusting arms 62 and 63 rotate in the direction in which the arm engaging portions 66 and 67 come close to each other with the both ends of the support rod 61 as axes. As a result, the power transmission line is taken in, and the tension applied to the vernier fitting 40 is applied to the adjustment tool 60. In this state, the connecting bolt 49 is removed. Then, as shown in FIG. 12B, the vernier fitting 40 is in a suspended state. Then, the bolt insertion hole 43 and the positioning hole 46 are selected and aligned so as to have a desired length, and the connecting bolt 49 is inserted into the selected bolt insertion hole 43 and the positioning hole 46 so that the outer plate 41, 41 and the inner plate 42 are connected. After that, the piston rod is retracted so that tension is applied to the vernier fitting 40, and then the adjustment tool 60 is removed and the operation is completed. The conventional vernier fitting described above is described in Patent Document 1.
JP 2000-102152 A

  By the way, in the tension device provided with the vernier fitting, as shown in FIG. 12B, the outer plates 41 and 41 and the inner plate 42 in the state where the tension applied to the vernier fitting 40 is released. The tip end side thereof is rotated downward about the mounting bolts 44 and 47 by its own weight. Therefore, when the connecting bolt 49 is inserted into the selected bolt insertion hole 43 and the positioning hole 46 to connect the outer plates 41, 41 and the inner plate 42, the plates 41, 41, 42 need to be leveled. . Therefore, this work requires a lot of work. In some cases, countermeasures for preventing rotation may be taken in advance, but in this case as well, extra work is required to implement the countermeasures.

  The present invention has been made in order to eliminate the above-described conventional drawbacks, and the object thereof is to suppress the free rotation of the vernier fitting as described above, and therefore, it is possible to easily perform the slackness adjusting operation. An object of the present invention is to provide a tension device equipped with a vernier fitting that can be used.

Therefore, the tension device provided with the vernier fitting of the present invention is a tension device interposed between a tension clamp 11 that supports an overhead power transmission line and an insulator attached to a support such as a steel tower. The inner plate 4 is interposed between the pair of outer plates 2 and 3 so that the length can be adjusted with respect to each other in the longitudinal direction, and the outer plates 2 and 3 and the inner plate can be adjusted at a predetermined adjustment position. 4 is provided with a vernier fitting 1 configured to be connectable to each other, and is inserted and connected between the outer plates 2 and 3 at a position near the end of the outer plates 2 and 3 on the side opposite to the inner plate. A connection fitting 13 for connecting the outer plates 2 and 3 to the tension clamp 11 side or the insulator side is provided, and the connection fitting 13 is located at a position closer to the inner plate 4 than the connection portion 6 to the outer plates 2 and 3. And Adjustment arm 62 of the adjusting tool 60 is characterized in that is provided capable of engaging the engaging portion 21 while holding the outer plates 2 and 3 from above and below.

  In addition, the adjustment arms 63 and 63 of the adjustment tool 60 can be engaged with the inner plate 4 in the vicinity of the ends of the inner plate 4 from the upper and lower sides in the vicinity of the ends on the opposite outer plates 2 and 3 side. An engaging portion 22 is provided.

  Further, on the side surfaces of the outer plates 2 and 3, the engaging arms 62 and 62 of the adjusting tool 60 can be engaged from both sides closer to the inner plate 4 than the position of the connecting portion 6 of the connecting fitting 13. 23 is provided.

  According to the tension device provided with the vernier fitting of the present invention, when the adjustment tool 60 is attached from the horizontal direction and the slackness adjusting operation is performed, the outer arms 2 and 3 are located near the engaging portion 21 of the connecting fitting 13. At the position, the upper and lower adjustment arms 62 and 62 are sandwiched from the upper and lower sides, and the adjustment arms 62 and 62 restrict the rotation of the outer arms 2 and 3. At this time, since the engaging portion 21 of the connecting fitting 13 is provided at a position closer to the inner plate 4 than the connecting portion 6 to the outer plates 2 and 3 of the connecting fitting 13, the tip of the adjustment arm 62 is securely attached. Therefore, the outer plates 2 and 3 can be clamped and their rotation can be restricted. Therefore, in the sag adjustment work, in the vernier fitting 1, the outer plates 2 and 3 are held in a substantially horizontal state without rotating around the connecting portion 6 as in the prior art, and the sag adjustment work is easy. And it can be done with high efficiency.

  Further, with respect to the inner plate 4, the state in which the tension is applied to the inner plate 4 is maintained, so that the rotation of the inner plate 4 is restricted at this point.

  Further, when adjusting the slackness by attaching the adjustment tool 60 from above and below, the adjustment arms of the adjustment tool are provided on the side surfaces of the outer plates 2 and 3 with the engaging portions 23 that can be engaged from both sides. The state in which the tension is applied to the outer plates 2 and 3 is maintained, and the rotation of the outer plates 2 and 3 is restricted.

  Next, specific embodiments of a tension device provided with the vernier fitting of the present invention will be described in detail with reference to the drawings. FIG. 1 is a top view of the tension device, and FIG. 2 is a front view thereof. In the figure, reference numeral 10 denotes a yoke connected to the lever side, and 11 denotes a tension clamp. In this case, a four-conductor tension device in which a pair of left and right power transmission lines is supported on the upper stage and a pair of left and right power transmission lines is supported on the lower stage. Since the support structure of each power transmission line is substantially the same, a support structure for a specific power transmission line (for example, located on the upper side in FIG. 1) will be described for convenience. First, as shown in FIG. 1, one end of the vernier fitting 1 is connected to the yoke 10 via a right angle clevis link 12 and a first connecting fitting (right angle clevis link) 13, and the other end of the vernier fitting 1 is connected to the yoke 10. The tension clamp 11 is connected through a second connection fitting (parallel clevis) 14, a right angle clevis link 15, and the like.

  As shown in FIG. 3, the vernier fitting 1 is composed of outer plates 2 and 3 located on the yoke 10 side and an inner plate 4 disposed between the outer plates 2 and 3. As shown in FIG. 4, the outer plates 2 and 3 are elongated flat plate-like components, and a plurality of (seven in this embodiment) bolt insertion holes 5 are formed at a predetermined pitch on the tip side. ing. The outer plates 2 and 3 are arranged to face each other with a predetermined interval so that the bolt insertion holes 5 coincide with each other, and the base ends thereof are attached to the first connection fitting 13 by the attachment bolts 6. In this case, the outer plates 2, 3 and the first connection fitting 13 are connected with the link of the first connection fitting 13 inserted between the outer plates 2, 3.

  On the other hand, as shown in FIG. 4, the inner plate 4 is also an elongated flat plate-like component like the outer plates 2 and 3, the width is substantially the same as the outer plates 2 and 3, and the thickness is the outer plates 2 and 3. It is formed slightly larger than. A plurality (9 in this embodiment) of positioning holes 7 are formed in the inner plate 4 at a predetermined pitch on the leading end side. The pitch of the positioning holes 7 is selected to be different from the pitch of the bolt insertion holes 5. The inner plate 4 is interposed between the outer plates 2 and 3 so that the positioning hole 7 can communicate with the bolt insertion hole 5, and the mounting bolt 8 is inserted into the insertion hole formed at the base end portion thereof. Are attached to the second connecting bracket 14. In this case, the base end of the inner plate 4 (the end opposite to the outer plates 2, 3) is formed thick, and this thick portion is fitted into the clevis of the second connecting fitting (parallel clevis) 14. ing.

  The vernier fitting 1 having such a configuration can adjust the positions of the outer plates 2 and 3 and the inner plate 4 to each other in the longitudinal direction, and is provided with connecting bolts 9 in desired bolt insertion holes 5 and positioning holes 7. By penetrating, the outer plates 2 and 3 and the inner plate 4 are connected to each other, and the vernier fitting 1 having a desired longitudinal length can be obtained. Here, since the bolt insertion holes 5 and the positioning holes 7 are formed at different pitches as described above, the combination of the bolt insertion holes 5 and the positioning holes 7 for penetrating the connecting bolts 9 is changed to change the vernier. The length in the longitudinal direction of the metal fitting 1 can be changed stepwise.

In the following, characteristic points in this embodiment will be described. In vernier fitting 1, as shown in FIG. 3, the link of the first connecting fitting 13, Oite the position of the inner plate 4 side than the connecting portion 6 of the outer plates 2 and 3, the adjusting tool adjustment arm 62 However, the 1st engaging hole (1st engaging part) 21 which can be engaged in the state which clamped the outer plates 2 and 3 from the upper and lower sides is provided. Further, in the vicinity of the end portion (thickness portion) of the inner plate 4 opposite to the outer plates 2 and 3, the adjustment arm of the adjustment tool is engaged with the vicinity of the end portion of the inner plate 4 from above and below. A second engagement hole (second engagement portion) 22 that can be combined is provided. In this case, the second engagement hole 22 of the inner plate 4 is provided on the side opposite to the outer plates 2 and 3 with respect to the position of the connection portion 8 of the second connection fitting 14. The first engagement hole 21 and the second engagement hole 22 are through holes extending in the vertical direction.

  Further, as shown in FIG. 4, the adjustment arms of the adjustment tool are engaged with the side surfaces of the outer plates 2 and 3 at positions closer to the inner plate 4 than the positions of the connection portions 6 of the first connection fitting 13 from both sides. A third engagement hole (third engagement portion) 23 that can be combined is provided. Further, a fourth engagement hole (fourth engagement portion) 24 is provided at a side portion of the second connection fitting 13 so that the adjustment arm of the adjustment tool can be engaged from both sides thereof. The third engagement hole 23 and the fourth engagement hole 24 are through holes extending in the horizontal direction.

  Next, a method for adjusting the length of the vernier fitting 1 will be described. Since the adjustment tool 60 used here is the same as that used in the description of the conventional example, the same reference numerals are assigned and detailed description thereof is omitted. As shown in FIG. 5, first, the adjustment tool 60 is attached from the horizontal direction (lateral direction). In this case, the position of the arm engagement hole (arm engagement portion) 66 of one adjustment arm 62 and the position of the first engagement hole 21 of the first connecting fitting 13 are matched, and the pivot bolts 58 are placed in both the holes 66 and 21. Is inserted, and both are connected. In this state, the outer arms 2 and 3 are sandwiched by the upper and lower adjustment arms 62 from both the upper and lower sides. That is, the upper and lower sides of the outer arms 2 and 3 can be formed by configuring the adjustment arm 62 with a pair of upper and lower plates or by forming the tip of the integral adjustment arm 62 in a bifurcated shape. The adjustment arms 62 and 62 are positioned on the outer side, and the outer arms 2 and 3 are sandwiched from both the upper and lower sides. Further, the positions of the arm engagement hole (arm engagement portion) 67 of the other adjustment arm 63 of the adjustment tool 60 and the second engagement hole 22 of the inner plate 4 are made to coincide with each other. 59 is inserted and both are connected. Also in this case, similarly to the first connection fitting 13, the adjustment arms 63, 63 are positioned above and below the inner arm 4, and the inner arm 4 is sandwiched from both the upper and lower sides.

  Then, when the piston rod 65 is advanced after the connection, the adjusting arms 62 and 63 rotate in the direction in which the arm engaging holes 66 and 67 come close to each other with the both ends of the support rod 61 as axes, thereby taking in the power transmission line. At the same time, the tension acting on the vernier fitting 1 acts on the adjustment tool 60, and in this state, the connecting bolt 9 that connects the outer plates 2, 3 and the inner plate is removed. Further, as shown in FIGS. 6A and 6B, the adjustment arms 62 and 63 are rotated, and the bolt insertion hole 5 and the positioning hole 7 are selected so that the vernier fitting 1 has a desired length. Then, alignment is performed, and the connecting bolt 9 is inserted into the selected bolt insertion hole 5 and the positioning hole 7 to connect the outer plates 2 and 3 and the inner plate 4. Then, after the piston rod 65 is moved backward so that tension is applied to the vernier fitting 1, the adjustment tool 60 is removed and the operation is completed.

  In the sag adjustment operation, as shown in FIG. 6, in the vernier fitting 1, the outer plates 2, 3 and the inner plate 4 do not rotate around the connecting portions 6, 8 as in the prior art. It is held in a substantially horizontal state. The reason is as follows. First, in the outer plates 2 and 3, the pivot bolts 58 are inserted into the adjustment arm 62 so that the positions of the arm engagement hole 66 of the adjustment arm 62 and the first engagement hole 21 of the first connection fitting 13 coincide with each other. The outer arms 2 and 3 are sandwiched by the upper and lower adjustment arms 62 and 62 from both the upper and lower sides in a state where the two are connected by the pivot bolts 58. 62 is positioned to regulate the rotation of the outer arms 2 and 3. At this time, since the first engagement hole 21 of the first connection fitting 13 is provided at a position closer to the inner plate 4 than the connection portion 6 to the outer plates 2 and 3 of the first connection fitting 13, the adjustment arm 62 is provided. The front end portion of the plate can securely pinch the outer plates 2 and 3 and restrict its rotation. Further, with respect to the inner plate 4, the state in which the tension is applied to the inner plate 4 is maintained, so that the rotation of the inner plate 4 is restricted at this point.

  7 and 8 show a state in which the adjustment tool 60 is attached from above and below to adjust the slackness. In this case, the adjustment arms of the adjustment tool are provided on the side surfaces of the outer plates 2 and 3 with the third engagement holes 23 that can be engaged from both sides, so that the tension remains on the outer plates 2 and 3. The rotation of the outer plates 2 and 3 is restricted.

  In this case, as shown in the figure, the inner plate 4 rotates, but in order to prevent the inner plate 4 from rotating, a structure as shown in FIG. 9 may be adopted. That is, the end of the inner plate 4 on the side opposite to the outer plates 2, 3 is extended to the engagement hole 24 side of the second connection fitting 14, and this extension is the same as the fourth engagement hole 24. A fifth engagement hole 25 is provided on the shaft. When the arm engagement hole 67 of the adjustment arm 63 and the third engagement hole 24 of the second connection fitting 14 are connected by the pivot support bolt 59, the pivot support bolt 59 is simultaneously connected to the fifth engagement hole 25. The inner plate 4 is also connected together with the adjusting arm 63 and the second connecting fitting 14. In this way, it is possible to prevent the inner plate 4 from rotating during the sag adjustment work.

It is a top view of the tension apparatus provided with the vernier metal fitting which is one embodiment of this invention. It is a front view of the tension device. It is a top view which shows the principal part of the vernier metal fitting in the above. It is a front view which shows the principal part of the said vernier metal fitting. It is a top view for demonstrating the length adjustment method of a vernier metal fitting. It is a top view which expands and shows the attachment state of an adjustment tool, (a) shows a shortened state and (b) shows an extended state. It is a front view for demonstrating the other length adjustment method of a vernier metal fitting. It is a front view which expands and shows the attachment state of an adjustment tool, (a) shows a shortened state and (b) shows an extension state. It is a front view which shows the example of a change of the inner plate in a vernier metal fitting. It is a top view which shows the tension | tensile_strength apparatus provided with the conventional vernier metal fitting. It is a top view which shows the length adjustment method of the conventional vernier metal fitting. It is a figure which shows the attachment state of the conventional adjustment tool, (a) shows a top view, (b) shows a front view.

Explanation of symbols

    1 .... Vernier metal fittings 2 .... Outer plate 3 .... Outer plate 4 .... Inner plate 6 .... Connection part 11 .... Tension clamp, 13 .... First connection metal fitting (connection metal fitting) 21 .. First engagement hole (engagement portion), 22 .. Second engagement hole (engagement portion), 23 .. Third engagement hole (engagement portion), 60 .. Adjustment tool, 62. Adjustment arm, 63 ... Adjustment arm

Claims (3)

A tension device interposed between a tension clamp (11) for supporting an overhead power transmission line and an insulator attached to a support such as a steel tower, and a pair of outer plates (2) (3) An inner plate (4) is interposed between the inner plate (4) and the length can be adjusted with respect to each other in the longitudinal direction. The outer plate (2) (3) and the inner plate (4) Are provided so that they can be connected to each other, and the outer plates (2) and (3) are positioned between the outer plates (2) and (3) at positions near the end on the side opposite to the inner plate. A connection fitting (13) is provided which is inserted and connected to connect the outer plate (2) (3) to the tension clamp (11) side or the insulator side, and the outer connection plate (2) Inner play than connecting part (6) to (3) (4) Oite the position of the side, the adjustment arm adjustment tool (60) (62) (62), the outer plates (2) (3) engageable in a state in which the pinched from the upper and lower engagement portions ( 21) A tension device provided with a vernier metal fitting.   In the vicinity of the end of the inner plate (4) on the side opposite to the outer plate (2) (3), the adjusting arms (63) and (63) of the adjusting tool (60) are located near the end of the inner plate (4). The tension device provided with the vernier fitting according to claim 1, wherein an engaging portion (22) that can be engaged in a state of being sandwiched from above and below is provided.   Further, on the side surface of the outer plate (2) (3), the adjustment arm (62) of the adjustment tool (60) is placed closer to the inner plate (4) side than the position of the connection portion (6) of the connection fitting (13). 62) The tension device provided with the vernier fitting according to claim 1 or 2, wherein an engaging portion (23) that can be engaged from both sides is provided.