JP4949183B2 - Parallel clevis - Google Patents

Description

The present invention relates to a parallel clevis, in particular, a vernier fitting located at the tip of the line side of a jointless fitting attached to the tip of the tension clamp of the transmission line to be tightened and a connecting fitting attached to the insulator series. The present invention relates to a parallel clevis connecting a connected right angle clevis link .

  An example of a conventional two-strand tension device (for four conductors) tightening method will be described with reference to the drawings. FIG. 2 is a plan view for explaining a tight line work situation, and FIG. 3 is a side view thereof. First, a state immediately before starting the tangling work will be described.

  An insulator series is connected to the steel tower by a tension device mounting bracket, and a line-side double yoke 50 is connected to the insulator series. 2 and 3, the steel tower, the tension device mounting bracket, and the insulator series are not shown.

  A vertical double yoke 54 is attached to the line side double yoke 50 by a right angle clevis 52, and an upper line side double yoke 58 is attached to the upper part of the vertical double yoke 54 via a right angle clevis 56, and the lower part is attached to the lower part. The underlined double yoke 70 is attached via a right angle clevis 68.

  The upper line side double yoke 58 and the lower line side double yoke 70 are metal flat plates having the same shape, and are arranged at a predetermined distance in the vertical direction as can be seen from the side view of FIG. Vernier metal fittings 62 and 63 are attached to the upper line side double yoke 58 via right angle clevis links 60 and 61 at a predetermined distance from the edge opposite to the edge to which the right angle clevis 56 is attached. . Right-angle clevis links 64 and 65 are connected to the line-side tips of the vernier fittings 62 and 63, and parallel clevises 66 and 67 are connected to the right-angle clevis links 64 and 65.

  As with the upper line side double yoke 58, the underline side double yoke 70 is provided with a vernier fitting via a right angle clevis link at a predetermined distance from the edge opposite to the edge to which the right angle clevis 68 is attached. Two units are attached. Furthermore, a right-angle clevis link and a parallel clevis are connected to the tip of the vernier fitting in order. 2 and 3, the right clevis link, the vernier fitting, the right clevis link, and the like that are attached to the lower line side double yoke 70 are omitted.

  Tensile clamps 74 and 75 are provided at the front ends of the power transmission lines 72 and 73 to be tightened, and a jumper socket (not shown) is formed on the lower surface of the power transmission lines 72 and 73 at the end of the tightening operation. In addition, the brackets 76 and 77 are attached to the tip ends of the tension clamps 74 and 75.

  There are four transmission lines, and the two upper lines are connected to vernier fittings 62 and 63 attached to the upper line side double yoke 58. The connection is made by fixing the Camares fittings 76 and 77 and the parallel clevises 66 and 67 attached to the tip ends of the vernier fittings 62 and 63 with bolts. Similarly, the two underlined strips are connected to vernier fittings attached to the underlined double yoke 70. In addition, in the cross section orthogonal to the extending direction of the transmission line, when the four transmission lines are viewed, the figure formed by the four transmission lines is approximately square, and each of the four corners of the approximately square is the square. The transmission line interval, the size of the double yoke, etc. are determined so that the transmission line is located.

  Here, the tangential line work refers to the tips of the camares metal fittings 76 and 77 and the vernier metal fittings 62 and 63 by pulling the power transmission lines 72 and 73 to the steel tower side using the camarete metal fittings 76 and 77 attached to the tip portions thereof. The operation | work which connects the parallel clevis 66 and 67 attached to the part is pointed out. Tightening work is carried out separately for the upper line and the underline.

  Hereinafter, the details of the wireline work will be described. However, although one of the four conductors will be described, the same applies to the other conductors. Tightening work is performed using a gold wheel. Two gold wheels, that is, a gold wheel on the transmission line side and a gold wheel on the steel tower side are required. The steel wheel 80 on the steel tower side is attached to the gold wheel mounting hole 92 of the line double yoke 50. This attachment is performed using a parallel clevis 86. Alternatively, U clevis may be used.

  A wire tightening tool 84 is attached to the commaless metal fitting 76 attached to the tip of the power transmission line 72 during wire tightening work. As shown in FIG. 3, the attachment direction of the tight wire tool 84 is attached in a form protruding vertically below the power transmission line 72. A gold wheel 78 on the power transmission line side is attached to the tight wire tool 84 using a right angle clevis 88. Alternatively, U clevis may be used. Then, when the tight wire 82 connecting the two gold wheels 78 and 80 is wound up by a winch or the like, the camares metal fitting 76 approaches the line double yoke 50.

  When the camales fitting 76 and the parallel clevis 66 can be connected, the winding of the tight wire 82 is stopped, and the connection between the camales fitting 76 and the parallel clevis 66 is performed using a bolt and a nut. However, at the time of connection, the vernier fitting 62, the upper line side double yoke 58, and the like hang downward due to gravity. Therefore, it is necessary to work to cause these connecting fittings with a rope or the like.

  FIG. 4 is an explanatory view showing a connection state of the chamarez fitting and the parallel clevis. The parallel clevis 66 includes two opposing clevis portions 66a having wall portions 110a and 110b on two opposite sides into which the link portion 76a of the camares metal fitting 76 is inserted, and two opposite sides into which the link portion 64a of the right angle clevis link 64 is inserted. And the other clevis portion 66b having two wall portions 110c and 110d.

  In order to insert the link portion 76a of the camares metal fitting 76 into the clevis portion 66a, the link portion 76a must be parallel to the clevis portion 66a, and the link portion 76a of the camales metal fitting 76 is connected to the parallel clevis 66 as shown in FIG. If the angle θ is set, it cannot be inserted. Since the link portions 76a and 64a can be inserted into the clevis portions 66a and 66b, the distance between the two wall portions 110a, 110b and 110c, 110d is slightly larger than the thickness of the link portions 76a and 64a.

  The parallel clevis 66 and the right-angle clevis link 64 are attached in advance at a place where it is easy to work. These connections are made by inserting the link portion 64a of the right-angle clevis link 64 into the clevis portion 66b of the parallel clevis 66, and using the bolt 100c and the nut 100d. Similarly, the connection between the parallel clevis 66 and the camares metal fitting 76 is made by inserting the link portion 76a of the camales metal fitting 76 into the clevis portion 66a of the parallel clevis 66 and then using the bolt 100a and the nut 100b.

  After the connection between the camare metal fitting 76 and the parallel clevis 66 is completed, the tight wire 82 is loosened, the transmission line tension is transferred to the tension device side, and then the tight tool 84 is removed from the camare metal fitting 76. The same work is performed for the other line of the upper line, but usually the two lines of line work are performed simultaneously.

  When the upper line 2 tie line work is completed, the underline 2 line tie work is similarly performed. However, the steel wheels 80 and 81 on the steel tower side need not be removed from the gold wheel mounting holes 92 and 93 of the line side double yoke 50. The work may be performed by attaching the gold wheels 78 and 79 on the power transmission line side to the tight line tools connected to the two underlined chamarez fittings. After the two lines of the upper line and the two lines of the underline are finished, the pipe jumper device is installed.

  Note that Patent Documents 1 to 3 show a method of performing a tight line operation using a gold wheel. However, the tension device is for two conductors.

Japanese Patent No. 3229095 JP 2002-51417 A Japanese Patent No. 2777185

  In the method shown in FIGS. 2 and 3, since a load is applied to the power transmission line 72 to which the camares metal fitting 76 is connected when the camales metal fitting 76 and the parallel clevis 66 are coupled, the link portion 76a of the camares metal fitting 76 is applied. Is inclined with respect to the clevis portion 66a of the parallel clevis 66, and it is difficult to insert the link portion 76a of the camares metal fitting 76 into the clevis portion 66a of the parallel clevis 66. Insertion is not possible unless the link portion 76a of the camares fitting 76 is parallel to the clevis portion 66a of the parallel clevis 66, but in order to make it parallel, the vernier fitting 62 caused by a rope or the like, the upper line side double yoke 58, etc. are raised again. Re-adjusting the position and rewinding the tight wire 82 connecting the two gold wheels 78 and 80 with a winch or the like to re-adjust the position of the camares fitting 76, etc. It was large and took a long time.

The present invention has been made in view of the above-mentioned problems, and its object is related to a tension device for four conductors , and one end of a commaless metal fitting attached to a tension clamp and one end of a right-angle clevis link at the time of tightening work. when connecting the parallel clevis bets, and a load is applied to Kamaresu bracket without parallel clevis and angle, even when difficult inserted into clevis portion parallel clevis connection between Kamaresu fitting parallel clevis work It is to provide a parallel clevis that can be smoothly performed.

The parallel clevis according to claim 1 of the present invention includes a line side double yoke connected to an insulator of a steel tower, a vertical double yoke attached to the line side double yoke using a right angle clevis, A tension device having an upper line side double yoke and an under line side double yoke attached to the vertical double line yoke using right angle clevises, and attached to the upper line side double yoke or the lower line side double yoke. In a parallel clevis that connects a right-angle clevis link connected to the line-side tip of the vernier fitting and a chamarez fitting attached to the tip of the tension clamp of the transmission line to be tightened , one end of the chamareth fitting is and one side clevis portion with two walls facing is inserted, and the other side clevis portion to which one end of the right-angled clevis link has two wall portions facing is inserted, And either one or both of the clevis portions are provided with an inclined permissible portion in which the surface near the entrance and the opposite side of the opposite wall portion are gradually lower than the center portion, The distance between the center portions of the opposing walls of the opposing side surface having the highest height is greater than the thickness of one end of the chamares fitting and the right angle clevis link .

By adopting such a configuration, even if the chamarez fitting is tilted from the horizontal plane due to the applied load, the clevis part has a surface near the entrance of the opposite wall part and the opposite side surface of the rear side part than the center part. Since the tilt allowing portion having a gradually lower height is provided, the chamares fitting can be easily inserted and fixed to the parallel clevis, and the connecting operation can be performed smoothly.

As described in claim 2, the opposing surface of the one side clevis part into which one end of the chamarez metal fitting is inserted is substantially the same as the opposing surface of the other clevis part into which one end of the right angle clevis link is inserted. Since the cross-sectional shape in a direction perpendicular to the plane and perpendicular to the extending direction of the opposing wall portion is substantially rectangular, the link portion of the chamares metal fitting and the right angle clevis link When the link portions are inserted into the clevis portions of the parallel clevis, each link portion does not wobble around the extending direction of the opposing wall portion in the clevis portion.

According to the present invention, in the parallel clevis that connects one end of the camares metal fitting and one end of the right angle clevis link , the inclination allowable portion is provided in the clevis part of the parallel clevis for inserting one end of the camales metal fitting or the right angle clevis link . The camares metal fitting can be easily inserted and fixed to the parallel clevis, and the connecting operation can be performed smoothly.

  Hereinafter, a Camarez fitting attached to the tip of the tension clamp of the transmission line to be connected, and a right angle clevis link connected to the vernier fitting located at the line side tip of the connecting fitting attached to the insulator series Embodiments of parallel clevises that connect to each other will be described with reference to the drawings. Note that the tightening method is the same as the method described in the prior art shown in FIGS. 2 and 3, and the same reference numerals are given to the same parts used in the tightening operation. A part of the tight line work will be described again.

  Tightening work is performed using two gold wheels 78 and 80. The gold wheel 78 on the power transmission line side is attached to the chamarez fitting 76 attached to the tip of the power transmission line 72 by using the tangential tool 84. As shown in FIG. 3, the stringing tool 84 is attached in a form protruding vertically below the power transmission line 72. The tight wire tool 84 and the transmission wheel side gold wheel 78 are attached using a right angle clevis 88. Alternatively, U clevis may be used. On the other hand, the steel wheel-side gold wheel 80 is attached to the gold wheel mounting hole 92 of the line double yoke 50. This attachment is performed using a parallel clevis 86. Alternatively, U clevis may be used. Then, when the tight wire 82 connecting the two gold wheels 78 and 80 is wound up by a winch or the like, the camares metal fitting 76 approaches the line double yoke 50.

  When the camares metal fitting 76 and the parallel clevis 12 are connectable, the winding of the tight wire 82 is stopped, and the vernier metal fitting 62, the upper line side double yoke 58, etc. hanging downward by gravity with a rope or the like are connected. Cause metal fittings. Thereafter, the connection operation between the camares fitting 76 and the parallel clevis 12 is started.

  FIG. 1 relates to a parallel clevis according to the present invention, in which FIG. 1 (a) is a side view and FIG. 1 (b) is an explanatory view showing a connection state with a camares metal fitting. The parallel clevis 12 according to the present invention includes a facing clevis portion 12a having a wall portion in two opposing portions into which the link portion 76a of the camares metal fitting 76 is inserted, and an opposing 2 in which the link portion 64a of the right angle clevis link 64 is inserted. And the other clevis portion 12b having one wall portion.

  Here, both of the clevis portions 12a and 12b are provided with an inclination allowing portion 12c in which the vicinity of the entrance and the back side portion of the facing side surface of the facing wall portion are gradually lower than the center portion, The distance between the center portions of the opposite wall surfaces having the highest height is slightly larger than the thickness of the link portions 76a and 64a of the camares fitting 76 and the right angle clevis link 64.

  As described above, the inclination allowing portion 12c is a portion whose height is gradually lower than the vicinity of the entrance on the opposite surface of the opposite wall portion and the central portion on the back side portion. Corresponds to the ground or curled portion from the clevis portion of the clevis. The tilt allowance portion 12c can be formed by polishing or grinding a conventional parallel clevis using a known technique such as a file or a drill, but a parallel clevis mold provided with the tilt allowance portion 12c is created. However, cast iron may be poured into it.

  As shown in FIG. 1A, the clevis portion 12a into which the link portion 76a of the camares metal fitting 76 is inserted has an acceptance allowable angle of only an angle θ1. The acceptance allowable angle is an angle at which the link portion 76a can be inserted within this angle even if the link portion 76a forms an angle with the clevis portion 12a. Similarly, since the inclination allowable portion 12c is also provided in the clevis portion 12b of the parallel clevis 12 into which the link portion 64a of the right-angle clevis link 64 is inserted, the allowable allowable angle is approximately zero in the past. It is spreading.

  Further, the facing surface of the one-side clevis portion 12a into which the link portion 76a of the chamarez metal fitting 76 is inserted and the facing surface of the other-side clevis portion 12b into which the link portion 64a of the right-angle clevis link 64 is inserted are substantially flush with each other. The cross-sectional shape in the direction perpendicular to the plane and perpendicular to the extending direction of the opposing wall portion is substantially rectangular. Here, the extending direction of the opposing wall portion is the same as the direction in which the transmission line is tightened, that is, the tension direction in which a load is applied to the parallel clevis 12. Accordingly, when the link portion 76a of the camares metal fitting 76 and the link portion 64a of the right-angle clevis link 64 are inserted into the clevis portions 12a and 12b of the parallel clevis 12, the link portions 76a and 64a are within the clevis portions 12a and 12b. There is no wobbling around the tension direction.

  Further, the cross-sectional area in the direction perpendicular to the above-described plane and including both clevis portions 12a and 12b is substantially equal to that of the conventional parallel clevis 66 without the inclination allowance portion 12c. Thereby, the intensity | strength of the parallel clevis 12 in which the inclination allowance part 12c was provided is not different from the conventional parallel clevis 66 which does not provide the inclination allowance part 12c.

  The connection between the parallel clevis 12 and the camares metal fitting 76 will be described. First, the parallel clevis 12 and the right-angle clevis link 64 are attached in advance in a place where it is easy to work. These connections are made by inserting the link portion 64a of the right-angle clevis link 64 into the clevis portion 12b of the parallel clevis 12 and using a bolt 100c and a nut 100d. Here, the tightening by the bolt 100c and the nut 100d is loosened so that the angle between the right angle clevis link 64 and the parallel clevis 12 can be changed to some extent.

  When inserting the bolt 100c, the holes of the parallel clevis 12 are slightly larger within the tolerance so that the bolt 100c can be easily inserted and the angle between the right angle clevis link 64 and the parallel clevis 12 can be changed to some extent. It is said.

  When the connection between the camares fitting 76 and the parallel clevis 12 becomes possible in the wire tightening operation, the winding of the tight wire 82 is stopped, and the vernier metal fitting 62 hanging downward by a rope or the like, the upper line side double yoke Causes connecting fittings such as 58. If the parallel clevis 12 is caused horizontally and the link portion 76a of the camares metal piece 76 makes an angle θ3 with the horizontal direction, the camares metal piece 76 and the parallel clevis 12 satisfy the condition of θ3 <(θ1 + θ2) / 2. You can connect.

  That is, for example, if the connecting bracket is caused to be horizontal, the conventional link clevis 12 of the present invention cannot be inserted unless the link portion 76a of the camares bracket 76 is horizontal, but the link portion of the right angle clevis link 64 of the present invention. The camares fitting 76 is connected even if it is angled rather than horizontal by the inclination allowance portion 12c of the clevis portion 12b into which the 64a is inserted and the inclination allowance portion 12c of the clevis portion 12a into which the link portion 76a of the camares fitting 76 is inserted. It becomes possible. Note that once the link portion 76a is inserted into the clevis portion 12a, it can be firmly fixed by the bolt 100a and the nut 100b, and the bolt 100c and the nut 100d on the right-angle clevis link 64 side are tightened to establish a connection. Complete. Note that the holes of the parallel clevis 12 have a slightly larger structure within an allowable range so that the bolt 100a can be easily inserted even if the camares bracket 76 has an angle.

  After the connection between the camare metal fitting 76 and the parallel clevis 12 is completed, the tight wire 82 is loosened, the tension of the transmission line is transferred to the tension device side, and then the tight tool 84 is removed from the camare metal fitting 76. The same work is done for the other line on the top line. When the upper line 2 tie line work is completed, the underline 2 line tie work is similarly performed. However, the steel wheels 80 and 81 on the steel tower side need not be removed from the gold wheel mounting holes 92 and 93 of the line side double yoke 50. The work may be performed by attaching the gold wheels 78 and 79 on the power transmission line side to the tight line tools connected to the two underlined chamarez fittings. After the two lines of the upper line and the two lines of the underline are finished, the pipe jumper device is installed.

  According to the parallel clevis of the present invention, the tilt allowing portion 12c is provided in the clevis portion 12a into which the link portion 76a of the camares metal fitting 76 is inserted and fixed and the clevis portion 12b into which the link portion 64a of the right angle clevis link 64 is inserted and fixed. Therefore, even if the camares metal fitting 76 and the parallel clevis 12 are at an angle, they can be easily inserted and fixed, and the connecting work at the time of tightening work can be performed smoothly.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the acceptance allowable angles θ1 and θ2 can be appropriately determined in consideration of various conditions such as the thickness of the transmission line and the weight per unit length. In addition, the technical idea of the present invention is the same situation, for example, in the case where one end of the first member and one end of the second member are connected by a parallel clevis regardless of the connection between the bracket and the right angle clevis link. It can be applied when a load is applied to the first member and connection is difficult.

It is explanatory drawing (b) which concerns on the parallel clevis of this invention, and shows the mode of a connection with a side view (a) and a chamarez metal fitting. It is a top view explaining the fastening method of the conventional tension device. It is a side view explaining the fastening method of the tension device conventionally. It is explanatory drawing which shows the mode of the connection of a parallel clevis and a Camares metal fitting in connection with the tight-wired method of the conventional tension device.

Explanation of symbols

12 Parallel clevis 12a, 12b Clevis portion 12c Inclination allowance portion 76, 77 Camarez fitting 62, 63 Vernier fitting 64, 65 Right angle clevis link 64a Right angle clevis link link 66, 67 Parallel clevis 72, 73 Transmission line

Claims (2)

A line-side double yoke connected to an insulator of a steel tower, a vertical double-line yoke attached to the line-side double yoke using a right-angle clevis, and a vertical-side double yoke attached to the vertical double-line yoke, respectively. A right angle clevis connected to a line side tip of a vernier fitting attached to the upper line side double yoke or the under line side double yoke of a tension device having an upper line side double yoke and an underline side double yoke In the parallel clevis that connects the link and the bracketless bracket attached to the tip of the tension clamp of the transmission line to be tightened ,
One clevis portion having two opposing wall portions into which one end of the chamarez fitting is inserted;
The other side clevis portion having two opposing wall portions into which one end of the right angle clevis link is inserted,
Either one or both of the clevis portions is provided with an inclination allowance portion in which the opposite side surfaces of the entrance wall portion and the back side portion of the facing wall portion are gradually lower than the center portion, and the facing wall The parallel clevis is characterized in that the mutual distance between the highest central portions of the opposing surface of each portion is larger than the thickness of one end of the chamares fitting and the right angle clevis link . The opposing surface of the one side clevis portion into which one end of the chamarez fitting is inserted and the opposing surface of the other clevis portion into which one end of the right angle clevis link is inserted are substantially on the same plane and orthogonal to the plane. And the cross-sectional shape of the direction orthogonal to the extending | stretching direction of the said opposing wall part was made into substantially rectangular shape altogether, The parallel clevis of Claim 1 characterized by the above-mentioned.

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