JPH0318204A - Non-reversible hanging wheel, support frame for wire extension, and wire extension method using the same - Google Patents

Abstract

PURPOSE:To enable collective wire-drawing to be attained without exchanging a wire in each steel tower part of two or more spans by arranging a partitioning member, which divides space surrounded by a pulley frame into two parts, mounting rollers in the upper and lower of each space, forming a clearance window part and removably mounting an arrow wheel-shaped sprocket to the outer side of a side frame. CONSTITUTION:A supporting frame 10 is constituted of a framework allowing free assembly having space for a hanging metal wheel K to pass through in the inside. Space, in which an existing wire and a new construction wire can be freely vertically moved, is constituted between upper rollers 2, 4 and lower rollers 3, 5, and a pulley frame 1, in which the pulley K is formed, is provided in the periphery. An arrow wheel-shaped sprocket 7 is removably mounted to a side frame 1b or its outside and constituted so as to provide a radial length of rotation by a degree enough to close a window part 6. Thus in each steel tower part of two or more spans, collective wire-drawing can be attained without exchanging a wire.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an epoch-making improvement of a non-reversible hanging wheel, which has attracted attention in the industry as a low-tension wire drawing method, and the improved hanging wheel. The present invention relates to a new support frame for allowing a steel tower arm to pass through without having to dodge the line, and a method for simultaneous line extension across multiple spans using these frames.

[Prior art] The basic method of extending overhead power transmission lines using a non-reversible hanging wheel K1 as shown in Fig. 11 is described in Japanese Patent Publication No. 57-50402, which was previously proposed by the applicant. In other words, the non-reversible hanging wheel K- has a frame 1 which forms spaces between the upper rollers 2-, 4- and the lower rollers 3-, 5-, respectively. - by 41[ and above (fl roller 2- or 4
- and the lower +1!11 roller 3'' or 5-, the wire is srIj. so that it can move freely between the rollers 3'' or 5-. To install a support line, as shown in Fig. 10, a support line 20 is stretched between the steel towers 'I1 and T2 (usually when the existing line is used as a support line) and suspended on the support line 20. A plurality of these non-reversible metal wheels K- are connected by a spacing wire 8- so as to run one upper roller of the metal wheel K', and are deployed on the support line 20 by, for example, a self-propelled machine. During this deployment, a new line 21 to be overhead wired is placed on one of the lower rollers, such as an optical fiber composite overhead ground wire (OPG).
W) is let out, and when the hanging wheel KK' is unfolded between the steel tower T'l and 4'2, the upper roller of one frame of the hanging wheel K1 is supported as shown in Fig. 11. line 20, and a new line (
The electric wire layer 21 is formed in such a state that it exists.

In this state, tension is applied to the electric wire 21, and the electric wire 21 is moved from the lower roller 3 to the upper roller 2-1 as shown by the arrow in FIG.
The tension is loosened and the roller is moved from the upper roller 4- to the lower roller 5-. If you do this, the wire 21 will be supported up to tL! 20, the tension-removed support wire 20 is recovered on the lower roller 5, and the tensioned electric wire 21 is used as a support wire to be attached to the hanging wheel K-. Once K- is collected, only the wire 21 remains, and the wire extension is completed.6 In this way, the space in the frame 1- is used to add or release the tension on the wire body, and the wire is suspended. This hanging wheel is called a non-reversing type hanging wheel because there is no need to turn the metal wheel K1 itself upside down, and it is the mainstream of low-tension wire extension that is currently used in the E1 power transmission line extension method. It has come to occupy
Particularly in the case of conventional wire-stretching methods, large-sized electric wires are subjected to large tensions, long-span extensions such as across seas, and OPGWs where it is undesirable to be subjected to tensions. The usefulness of this method5 has been highly praised for the extension of railway lines.

However, as can be seen from the above explanation, the hanging wheels K-, K
The deployment of - is carried out only in the span of one tower,
In the past, it was impossible to deploy this across several spans of a steel tower at once.For this reason, when trying to extend a wire over several spans, the required number of hangers must be installed in each span of a steel tower. The car KK- was brought in and the hanging car K-. After deploying K1, the wire was extended by making troublesome line dodges at the tower arms. Deploying the hanging wheel K1 is complicated, and depending on the terrain, there may be spans where it is difficult to bring in the hanging wheel, which may hinder deployment. If it becomes possible to carry out the main wire extension work at the drum yard and the engine yard, as in the construction method, and deploy the hoisting cars over several spans at once from the drum yard or the engine yard, then this non-reversible hoisting car can be used. The range of application of the low-tension wire drawing method used will be dramatically expanded.

Therefore, based on this knowledge, the applicant first proposed a hanging wheel that can deploy the hanging wheel all at once over several spans of extended wire.
1 This is as shown in Fig. 8, which shows its explanatory front view, and Fig. 9, which shows its left side view! It consists of the IIi precepts. Note that the same reference numerals as in FIG. 11 above indicate the same configurations.

The features of the hanging wheel K according to this proposal are as shown in FIG.
, 5- is the space K-1 in which the striatum can move freely,
A part of the side frame of the frame 1- shaped as K-2 is provided with an opening/closing piece 1<<-3 that can be opened and closed in the direction in which the electric wire is extended.

In order to pass the steel tower arm using the hanging wheel K1 configured as described above, a support arm S1 is attached to the steel tower arm and a support roller S2 is provided at the tip of the support arm S1, as shown in FIG. .

Since the hanging wheel of the conventional structure shown in Fig. 11 cannot pass through such a support roller S2, the hanging wheel was deployed individually for each tower span. Since the hanging wheel according to the invention has the opening/closing piece 1-3 that can be opened and closed in the direction of extension of the electric wire, it can automatically pass through the support roller s2, as shown in FIG. , is an explanatory view showing how the hanging wheel K' is about to pass the support roller s2.

Support Samurai Roller S2 supports #lt! S1 is attached to the tower arm, and when the hanging wheel K- is about to pass through the supporting arm S1 as shown in the figure, the support @s1 is attached to the hanging wheel K.
Push open the first opening/closing piece K-3, and thereby
1. After passing the suspension wheel K--support @S1 which can smoothly pass over the support roller s2, the opening/closing piece K3 automatically closes to its original state, In addition, in FIG. 7, reference numeral 83 indicates that when the hanging wheel K1 passes through the support roller S2, it becomes cantilevered and the upper measuring roller 2-, which is running, comes off the wheel. This is a falling-off prevention metal fitting that holds down the first surface of the roller ffi to prevent it from falling off.

As described above, the hanging wheel K-. K" automatically passes through the support rollers S2 of the steel tower in sequence, and even if it spans a continuous line span or multiple spans of a steel tower, it can be carried out all at once without deploying individual hanging wheels at intermediate towers. The gist of this proposal is that it is possible to deploy the suspension car train, and it is also possible to simultaneously extend the electric wire 21 onto the lower roller when the suspension car K\K- is deployed6. However, as mentioned above, the metal wheel K-3 having the opening/closing piece K-3 is
As a result of actually carrying out line extension work using This refers to the direction change angle, and in some cases, the metal wheel may come off from the opening/closing piece K-9 and fall down.7 This is the horizontal angle. In addition to the fact that the component force of the wire drawing tension is unexpectedly large at It is thought that this is because the metal piece itself becomes cantilevered and becomes extremely unstable, making a fall-off prevention metal fitting 83 of little use.

In addition, in both the conventional and proposed examples, there is another problem in that the work of inserting and removing support wires and electric wires into the space inside the metal car is unexpectedly complicated, and multiple spans can be extended at the same time. The purpose of the present invention is to solve the above-mentioned problems of the conventional technology, and to provide a horizontal line to the power transmission line during line extension using a non-reversible hanging wheel. Even if there are corners, the steel tower can be passed through the tower section stably, and the suspension wheel can be deployed all at once in several spans, and support wires and wires can be inserted into the steel wheel. The object of the present invention is to provide a non-reversible hanging wheel that can make removal much easier, a support frame for wire stretching that is a tool for the same, and a new method for simultaneous wire stretching using the same.

[Means for Solving the Problems] The present invention divides the space surrounded by the frame into two by arranging a partition member at an intermediate position approximately inside the outline of the metal wheel frame to divide the space into two, and While rollers are installed above and below the space, gap windows communicating with the respective spaces are formed on the left and right side frames of the metal wheel frame, and gaps between the windows can be closed on the outside of the left and right side frames. The first point is that an arrow-shaped sprocket with a rotation radius of It consists of a frame having an inner space, and support arms having an L-shaped outer shape are protrudingly attached to the left and right frame members (a11) of the frame, respectively, and the horizontal support arms of the 17-shaped arms The part is configured to be able to pass through the gap between the windows of the metal wheel and the space inside the metal wheel, and the tip of the vertical part is suspended so that a card member or support wire can be attached, and the entire frame is suspended. The second point is that one or both of the hanging metal fittings and the mounting height adjusting metal fittings for installation on the tower arm are installed, and when extending the line, the support frame must be hung on the tower arm. It can be lowered or installed and fixed on the tower arm, and a support wire is attached to the tip of one L-shaped support arm of the support frame, and a card member is attached to the tip of the other support arm. Then, each of the upper rollers of the safe is made to run over the support line and the card member, while the horizontal part of the support arm is made to pass by rotation of the sprocket, and by passing the support frame one after another in this way, a plurality of The third point is to deploy the necessary number of hanging wheels continuously over the wire span consisting of steel towers, and perform low-tension wire drawing work using the batch simultaneous wire drawing method. The windows on the left and right sides of the metal wheel make it very easy to take support wires and wires in and out, and since the windows are usually covered with a dowel-shaped sprocket, there is no gap between the support wires or wires or the window. It won't jump out.

In addition, if the track has a horizontal angle, a card member that can have a curvature that matches the horizontal angle is attached, while a frame that can attach a support wire in parallel to the card member on the other side of the space. If a shaped tool is attached, the metal wheel can pass through the space inside the tool in a horizontal state even in a steel tower with a horizontal angle, and there is no risk of it falling off.6 Attach the above tool to each steel tower arm in the continuous span of wire extension. When the metal wheel is unfolded and the wire is simultaneously fed out onto the metal wheel at the same time, it is possible to use a non-reversible hanging wheel to simultaneously stretch multiple spans at once in the same way as the conventional tension wire stretching. .

[Example] The present invention will be described in detail below with reference to the drawings of the example.

FIG. 1 is an explanatory diagram showing a non-reversing hanging wheel K according to the present invention passing through a wire extending support frame 10 according to the present invention.

13, a support frame 10 is desirably configured to be freely assembled, and configured into a frame body having a space inside thereof through which a hanging wheel K according to the present invention can pass.

The hanging wheel K is essentially the same as the configuration described above as a conventional example or an already proposed example. There is no difference in the fact that the metal wheel frame is formed into a space in which the line can freely move up and down, and that the metal wheel frame ■ that forms the hanging wheel K is provided on the outer periphery of the space.6 However, in the present invention, the substantial The difference is that shape retention is not dependent on the above-mentioned metal wheel frame 1, but rather on the partition member 1a provided approximately at an intermediate position on the inside thereof.

That is, in the hanging wheel K according to the present invention, the left and right side frames 1b, lc are formed with windows 6, 6 that communicate with the inner space of the metal wheel having the interval G shown in FIG. This side frame]. b, lc, there is no relationship in which the strength of the entire metal wheel frame 1 can be substantially maintained7.
Alternatively, a sprocket 7 is removably attached to the outside of 1b (TIJ1 is shown in the front view in Figure 2), and the sprocket 7 has a slightly convex shape as shown in Figure 2. The radius of rotation indicated by the dashed line is centered around the rotation axis 7a of the sprocket, and the radius of rotation is long enough to close the window 6.6 formed in the frame 1b or 1c as shown in FIG. 7 On the other hand, as mentioned above, passing through the hanging wheel K which is
Outer frame 10b of the support frame 10 having a functional inner space
．． 10c, support arms 11 and 12 each having an L-shaped outer shape are provided facing each other toward the inside of the frame space. 1-○a is composed of a roller frame,
FIG. 3 is an explanatory sketch showing a specific example of the L-shaped support arm 11 or 12 of the support frame 10 as shown in Jx.

Is there any problem even if the support frame 10 is a single unit?
Preferably, a double wire structure (
Furthermore, it is preferable to configure the bridge member 10d, which is bridged to the left and right frame members of JfIII, to the two series (there is no problem even if there is a plurality of series).
From d, the L-shaped support arms l1 and 12 shown in FIG.
Figure 3 is a sketch showing how the support arm 11 or 12 is made to protrude from the bridging member 10d in this way. The L-shaped horizontal portion of the supporting arm 11 or 12 is oval shaped into a connecting rod connecting the tips of the plural # rods spaced apart as shown in Fig. 3, and the vertical portion of the L-shaped arm As shown in Fig. 3, stand upright from both ends of the connecting rod attached to the tip of the #! rod, and hold a card member such as a card pipe 13 and a support wire (usually Existing line 1 for re-covering
6), but in newly constructed steel towers, a separately extended messenger wire, etc.) can be attached, and if necessary, the vertical part of the L-shape can be attached as shown in Figure 3. A card pipe 13 or a support wire 20 is attached to the tip of the holder.

If all the extension sections are straight, is it okay to form the card pipe 13 in a straight line? There are many horizontal angle towers, that is, towers that require a change in the direction of electrical wires. When passing through such a steel tower, the card pipe 13 may be formed with a curvature that matches the horizontal angle, and in that case, the support line 2
Even at 0 fTII, without increasing the number of vertical parts of the support arm so that it can be made parallel to the curvature of the card pipe l3, I! 1? 7. The lower frame 10a of the support frame 10 may be composed of a rotatable roller frame as shown in Fig. In the event that the electric wire 21 or 17 runs into the electric wire 21 during the wire extension, the roller frame 10a receives and rotationally supports the electric wire 21, thereby preventing damage to the outer surface of the electric wire 216. As shown in FIG.
5, and when actually extending the line, the support frame 10 is placed above the arm 1 [tl1
In this case, for hanging, it is sufficient to provide a suitable hanging fitting 14 as shown in Fig. When installing on two sides, it is possible to adjust the height difference of the normally existing tower arm with respect to the 01'N slope using an appropriate height adjustment fitting 15 that can keep the support frame 10 in a horizontal state. It is recommended that the system be configured as follows.

To extend multiple spans at once using the non-reversible hanging wheel K and support frame 10 according to the present invention as described above,
A support frame 10 is hung or installed on each of the arms of the iron 18 tower located in the middle of the wire span, and the distances are maintained by spacing wires 8 for holding the metal wheels K at appropriate intervals. While holding the metal wheel K, the metal wheel K is fed out one after another, and then a new line, such as OPGW, to be built on one of the Shimogo rollers 3 is sequentially fed out, as shown in Fig. 1. As previously explained, if you pass the support frame 10 that is already attached to the tower arm one after another, you can move the gold wheel K and the new train all the way to the engine station side without having to do any of the line dodging that was previously required. It becomes possible to expand and extend the wire 21 all at once.As already explained, the sprocket 7 is configured to be removable, and the support wire 20 and the new fi
21, you can insert it through the window 6 with the sprocket 7 removed, and insert it into the metal wheel K.
Even when taking out the sprocket from the sprocket, it can be easily taken out using the window 6 in the same way by removing the sprocket 7. 6 The installation and removal using this window 6 is much easier than the conventional example. It requires less labor and can be done quickly and easily.

In addition, in the above, the metal wheel K has to pass through the L-shaped support arm of the support frame, or as already explained, the sprocket 7 is shaped like an arrow wheel! Since the sprocket 1 and the gap 7b are present, it is possible to easily straddle the horizontal bar of the support arm shown in FIG. 3 with the gap 7b of the sprocket 7. There is no problem with the above. During the actual line extension, the metal wheel K is running on the support line 20 at the middle of the tower, and therefore it is unfolded in a slightly cantilevered state. Since the support frame 10
The upper roller 2 is attached to the card pipe 13 as shown in FIG.
In order to make it easier to climb on, the tip or rear end of the card pipe 13 may be configured to be arched and lowered, as shown in FIGS. 5 and 6.

FIG. 5 is an explanatory diagram 20 showing the state in which the gold wheel K has just climbed onto the card pipe 13 in this way, and FIG. FIG. (On the opposite side, it passes over the support line 20.) If a non-reversible hanging wheel is configured as described above, and the support frame 10 configured as described above is used as a tool for passing through the tower arm, In the tower arm passing section, the hanging wheel always maintains a horizontal state and can not only stably pass through the tower arm section, but also allow the hanging wheel to pass stably even in areas where there are horizontal angles, which has already been done. The fear of the gold wheel falling off as seen in the proposed example is completely eliminated.
I did the above! Each of the M configurations is an example, and it goes without saying that various design changes can be made within the technical scope of the present invention.

[Effects of the Invention] As described above, according to the non-reversible hanging wheel, support frame for wire extension, and wire extending construction method according to the present invention, a non-reversible hanging wheel is used in each tower section of multiple spans. This makes it possible to extend the line all at once without having to dodge the line, and completely eliminates the troubles that conventionally tended to occur in the intermediate tower arm. This eliminates the need for complicated work such as transporting and deploying metal wheels for each tower, and has a very large effect in reducing man-hours on the line and greatly saving labor.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing how the support frame according to the present invention is used to pass through a non-reversible hanging wheel according to the present invention, and Fig. 2 shows a sprocket attached to the hanging wheel according to the present invention. 3 is an explanatory sketch showing an example of a support arm protruding inside the support frame,
FIG. 4 is an explanatory diagram showing the case where the support frame according to the present invention is attached to a steel tower, FIG. 5 is an explanatory diagram showing a state in which the hanging safe according to the present invention has started passing through the support frame according to the present invention,
FIG. 6 is an explanatory diagram showing a state in which the hanging wheel is about to leave the support frame, and FIG. 7 is an explanatory diagram showing the passing of the tower arm portion of the hanging wheel, which was proposed in 2 2 . Figure 8 is an explanatory front view of the hanging wheel already proposed.
Fig. 9 is an explanatory left fi{I1 side view, Fig. 10 is an explanatory view showing a low-tension wire drawing situation, Fig. 11 is an explanatory front view of a conventional non-reversible hanging wheel without showing its formation, and Fig. 11 is an explanatory view showing the low tension wire drawing situation. FIG. 12 is an explanatory diagram showing a situation in which the support wire and the electric wire are turned upside down in the space inside the metal car. 1: Metal wheel frame, 1a: Partition member, 2.3.4.5: Roller, 6: Window, 7: Sprocket, 8: Spacing wire, IO: Support frame, 10a: Roller frame, 11.12: Support arm, 13: Card pipe (card member), 14: Hanging metal fitting, 15: Height adjustment metal fitting, 20: Support line (existing line), 23 21: New line (OPGWl, K: non-reversible type Hanging wheel.

Claims (4)

[Claims] (1) A partition member that divides the space surrounded by the frame into two is placed at an intermediate position approximately inside the outline of the metal wheel frame, and the space is divided into two, and rollers are installed above and below each space. Gap windows are formed on the left and right side frames of the vehicle frame to communicate with the respective spaces, and on the outside of the left and right side frames, an arrow-shaped sprocket having a radius of rotation sufficient to close the gap between the windows. A non-reversible hanging wheel with removably attached. (2) It consists of a frame having an inner space through which the hanging wheel according to claim 1 can pass, and inside the left and right frame members of the frame, there are supports each having an L-shaped outer shape facing each other. An arm is attached to protrude, and the horizontal part of the L-shaped arm is configured to be able to pass through the gap in the window of the metal wheel and the space inside the metal wheel, and the tip of the vertical part is configured to attach a card member or a support wire. A support frame for wire extension, which is constructed such that it can be attached to a steel tower arm, and is provided with either or both of a hanging fitting for suspending the entire frame and a mounting height adjustment fitting for installing it on a steel tower arm. (3) The support frame according to claim 2, wherein the frame body constituting the support frame is configured to be freely assembled, and the lower frame is configured by a freely rotatable roller frame. (4) The support frame according to claim 2 or 3 is suspended from the tower arms of a plurality of steel towers in the extension span or installed and fixed on the tower arms, and one of the support frames is L-shaped. A support wire is attached to the tip of the support arm,
A card member is attached to the tip of the other support arm,
Each of the upper rollers of the metal wheel of claim 1 is caused to run over and pass over the support line and the card member, while the horizontal portion of the support arm is caused to pass by being straddled over by the rotation of the sprocket, and in this way, the support frame is sequentially moved. A wire-stretching method in which the necessary number of hanging wheels are deployed in succession across the span of multiple steel towers to carry out simultaneous wire-stretching work.