JP4352404B2 - Paint scattering prevention device for painting power transmission tower and painting method for power transmission tower - Google Patents

Description

  The present invention relates to a paint scattering prevention device and a power transmission tower coating method for repainting a power transmission tower that has been peeled off or rusted.

  The power transmission tower installed with paint is also inevitable that the coating film peels off and rusts over time, and the durability of the steel material is impaired and the landscape is damaged. Therefore, it is necessary to repaint the power transmission tower every certain period or according to the rusting state. Depending on the installation location of the power transmission tower, however, Since some of them have a length of about 70 m, it is necessary to prevent the paint from dripping during painting, and to prevent the paint from being scattered around the transmission tower by wind power.

Therefore, as a technique for solving the problem of dripping or scattering of paint during painting, a simple method is used in which a paint fall prevention net is disposed on the lower side of the arm protruding laterally from the steel tower body. Also, the insulation operation rod that is longer than the distance that should not be approached to the transmission line, supported by the tip of this insulation operation rod, is engaged and disengaged at the top of the insulator series, and the coating material falls to the insulator series A protection plate for preventing the above, an insulation net stretched below the arm from the protection plate engaged with the upper part of the insulator series, and a drum that is rotatably attached to the tower body and winds up the insulation net, There is a paint scattering prevention device at the time of painting a power transmission tower including a handle for rotating a drum (Patent Document 1).
Japanese Patent Laid-Open No. 7-155656

  By the way, the problem in painting work for power transmission towers is that it is difficult to completely stop power transmission for painting work because large-sized transmission lines have many very important lines in terms of power supply. is there. However, since the conventional paint drop prevention net is easily affected by wind, it cannot prevent the paint from being scattered, and it is difficult to ensure a safe distance from the power transmission line. In addition, the technique shown in Patent Document 1 does not form a work space that is not affected by wind so as to surround the arm, and cannot reliably prevent the paint from being scattered. There is a problem that work is impossible unless power transmission is stopped. For this reason, the present condition is that the painting of the power transmission tower installed in the city area etc. where the scattering prevention measure is indispensable must be neglected.

  The present invention has been made in view of the above-mentioned drawbacks of the prior art, and can reliably prevent the paint from splashing around during the painting work, and the splash prevention net can be reduced at night, so even during the painting work period. Since power transmission is possible at night, it is possible to minimize the impact on daily life and industrial activities, and to provide a paint scattering prevention device and painting method for power transmission towers that can minimize the effects of wind. Objective.

  The means of the present invention according to claim 1 configured to solve the above-mentioned problem is composed of a tower body and an arm projecting in the lateral direction from the tower body at a distance from the height body, A paint scattering prevention device for a power transmission tower for painting a power transmission tower that supports a power transmission line via an insulator provided on the tip side of the arm, and is attached to the tower body in accordance with the position of the arm A frame support bracket, a net frame installed on the tip side of the arm to form a work space, a support cable stretched between the net frame and the frame support bracket, and surrounding the arm It consists of an anti-scattering net that can be deployed on the support cable from the arm to the net frame to be formed.

  And it is good to lay a paint fall prevention sheet in the bottom in the work space formed by the scattering prevention net.

  The means constituting the present invention according to claim 3 is composed of a tower body and a plurality of arms protruding in the left and right lateral directions from the tower body so as to be spaced apart from each other in the height direction. A transmission tower painting method for painting a transmission tower that supports a transmission line via an insulator provided on the side, the step of attaching a frame support fitting to the tower body in accordance with the position of the arm; and A step of installing a net frame on the distal end side of the arm to form a work space, a step of stretching a support cable between the net frame and the frame support bracket, and surrounding the arm to form a work space. In order to form, there are a step of detachably hanging a scattering prevention net on the support rope from the arm to the net frame, and a step of forming the scattering prevention net and coating the arm in the work space.

  And it is good to perform the process of laying the coating material fall prevention sheet on the bottom, after suspending the scattering prevention net on the support rope so as to be unfoldable and forming the working space.

Since the present invention is configured as described above, the following effects can be obtained.
(1) A net frame is installed at the tip of the arm, and an anti-scattering net is extended from the arm to the net frame to form a work space, so that painting can be performed safely even in strong winds. The situation where the paint is scattered around can be surely prevented.
(2) Since the anti-scattering net is installed on the net frame from the arm that holds a safe distance with respect to the power transmission line, power can be transmitted at night without being affected by the anti-scattering net.
(3) Since the anti-scattering net is provided on the support rope so that it can be expanded and reduced, it is easy to open and close the net at the start and end of work, and to respond quickly to sudden changes in the weather during work. it can.
(4) The support cable stretched between the net frame and the tower body not only supports the net in a deployable manner, but also suppresses the swing of the net frame, and thus is excellent in safety.
(5) Since the anti-scattering net is reduced at night after work to avoid being affected by wind, the anti-scattering net does not become a noise source, and there is an accident such as the net breaking due to wind pressure. Absent.
(6) Since the paint drop prevention sheet is laid on the bottom surface of the anti-scattering net, which is the lower side of the work space, it is possible to reliably prevent the paint from falling.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 denotes a tower body that constitutes an existing power transmission tower, and the tower body 1 is assembled by linking connecting members 3, 3,. 4, 4,... Indicate a pair of arms that are spaced apart from each other in the height direction and project substantially horizontally from both sides of the tower body 1. The arms 4 extend horizontally from the tower body 1. A pair of main arm members 4A, 4A protruding and contacting the tip side, inclined arm members 4B, 4B extending obliquely from the tower body 1 toward the tips of the pair of main arm members 4A, 4A, and the inclination It consists of reinforcing materials 4C, 4C,... Connected between the arm material 4B and the main arm material 4A. Reference numerals 5 and 5 denote a pair of insulators suspended in a substantially V shape by connecting the upper ends to the arms 4, and a power transmission line is hung on the wire holder 6 provided at the lower ends of the pair of insulators 5 and 5. It is designed to be mounted. In addition, the escort rail 7 for ensuring the safety at the time of an operator raising / lowering is provided in the outer side of the tower body 1 (refer FIG.2 and FIG.3).

  Reference numeral 11 denotes a frame support fitting which is located in the vicinity of the arm 4 and protrudes outwardly in the lateral direction on each column 2 of the tower body 1. The frame support bracket 11 has a substantially L-shaped mounting board 11A that is fixed to the column 2 of the tower body 1 and protrudes from the mounting board 11A, and is formed in a halfway shape in the middle to avoid interference with the escort rail 7. A bent fixed base material 11B, a support member 11C removably connected to the distal end side of the fixed base material 11B, and upper and lower support ropes 23A (24A) described later are disposed on the upper and lower surfaces and both side surfaces of the support material 11C. ), 23B (24B), and a plurality of locking rings 11D, 11D,... The frame support bracket 11 is positioned below the fixed base 11B, has a proximal end fixed to the support column 2, and is supported from below by a reinforcing support 12 that connects the distal end to the distal end side of the support member 11C.

  Reference numeral 13 denotes a net frame installed on the arm 4 so as to form a work space A in the arm 4. The net frame 13 is formed by connecting steel materials into a cubic shape, and includes a pair of front and rear horizontal support members 15 and 15 attached to the main arm members 4A and 4A in a crossed state by fasteners 14, and upper and lower, front and rear, and inner sides. A pair of side frames 16 and 16 connected in a square shape by the five side frame members 16A, 16A, 16B, 16B and 16C, and a pair of front supports connecting the pair of side frames 16 and 16 on the front side and below. Members 17, 17, a longitudinal connecting member 18 that connects the front supporting members 17, 17 at the center, a rear supporting member 19 that connects the pair of side frames 16, 16 at the rear upper portion, and the center of the front supporting member 17. And a pair of abdominal members 20 and 20 installed on the rear end side of the side frame member 16A, and rear connecting members 21 and 21 that project obliquely rearward from the rear support member 19 and are connected to the inclined arm member 4B. It is.

  Reference numeral 22 denotes a splash prevention net for preventing the paint from splashing during painting. The anti-scattering net 22 is composed of two surfaces, one side net structure 22A and the other side net structure 22B that cover the front surface of the net frame 13 while covering the front surface of the net frame 13 from the side surfaces of the arm 4 and the net frame 13 to the center of the bottom surface. However, the configuration is such that the insulators 5 and 5 are avoided. For the one side net structure 22A and the other side net structure 22B, those having an air blocking rate of about 60% are used so as to reduce the wind pressure and prevent the paint from scattering, and a support rope 23A described later. , 24A is slidably inserted along the upper edge, and along the lower edge is formed a pigeon for engaging an engagement ring 25 described later.

  Reference numeral 23 denotes a one-side net expansion mechanism for expanding and contracting the one-side net structure 22A. The one-side net expansion mechanism 23 is a front side of the upper frame support metal 11 and the net frame 13 protruding from the tower body 1. An upper support line 23A stretched between the upper end corners, and a lower support line 23B stretched between the lower frame support bracket 11 and the front lower end of the net frame 13 corresponding to the upper support line 23A; Pulleys 23C, 23C provided at the front upper corner and the front lower corner of the net frame 13, respectively, and an opening / closing string 23D engaged with each pulley 23C and connected to the tip of the one-side net structure 22A at an intermediate position. It is composed of

  Reference numeral 24 denotes an other side net expanding mechanism for expanding and contracting the other side net structure 22B. The other side net expanding mechanism 24, like the one side net expanding mechanism 23, An upper support line 24A stretched between the front upper end corners of the net frame 13, and a lower frame support bracket 11 and a front lower end corner of the net frame 13 corresponding to the upper support line 24A. The lower support rope 24B, pulleys 24C and 24C provided at the front upper corner and the front lower corner of the net frame 13, respectively, are engaged with the pulleys 24C, and are connected to the tip of the other-side net structure 22B at an intermediate position. And the opening / closing string 24D.

  Thus, the pair of one side net constituting body 22A and the other side net constituting body 22B constituting the anti-scattering net 22 are suspended from the left and right upper support ropes 23A (24A) so as to be able to advance and retreat, and the lower support ropes 23B ( 24B), the scattering prevention net 22 is hooked in a substantially square shape so as to wrap the arm 4 by bending the inner side in the lateral direction and connecting the both ends with a plurality of engagement rings 25, 25,. . Then, the arms 4 and the net frame 13 are surrounded by operating the strings 23D and 24D for opening and closing and unfolding the anti-scattering net 22 in the direction indicated by the arrow so as to close the curtain as shown in FIGS. Working space A is formed. Reference numeral 26 denotes a paint drop prevention sheet laid on the bottom surface of the formed work space A. By covering the gap between the pair of net components 22A and 22B, the paint can be reliably prevented from falling. In the above-described configuration, the left and right upper and lower support ropes 23A (24A) and 23B (24B) also have a function of suppressing the net frame 13 from swinging due to the wind pressure, thereby enhancing strength and safety. ing.

  The paint scattering prevention apparatus according to the present embodiment has the above-described configuration. Next, a process of installing the transmission tower on the power transmission tower will be described. First, four frame support fittings 11, 11,... Are attached to the column 2 of the tower body 1 corresponding to the four corners of the arm 4 provided in the tower body 1. A net frame 13 is installed on the distal end side of the arm 4 separately from the attachment process of the frame support metal 11. The installation work of the net frame 13 will be described with reference to FIG. 4. First, the two horizontal support members 15 and 15 are firmly attached to the positions of the main arm member 4A near the tip by the fasteners 14, 14,. To do. Side frames 16 and 16 on both sides are connected to the two horizontal support members 15 and 15, front support members 17 and 17 and a rear support member 19 are connected between the side frames 16 and 16, and a lower front support is connected. A pair of abdominal materials 20 and 20 are obliquely installed on the material 17 and the side frames 16 and 16, and the rear connecting members 21 and 21 protruding from the rear support member 19 are connected to the inclined arm member 4B. Thus, the net frame 13 is installed on the distal end side of the arm 4 with excellent stability and safety.

  When the net frame 13 is installed on the arm 4, the upper support ropes 23 </ b> A and 24 </ b> A inserted through the eyelets provided on the upper edges of the net components 22 </ b> A and 22 </ b> B are stretched between the frame support fittings 11 and the net frame 13. In addition, the lower support ropes 23B and 24B are stretched between each frame support and the net frame 13. Thereby, net structure 22A, 22B will be in the state hung on support rope 23A, 24A. And the lower part side of net structure 22A, 22B is folded down under the arm 4, and the front end side which faced | matched is connected with the engagement rings 25, 25, ... (refer FIG. 10). Finally, a paint drop prevention sheet 26 is laid on the bottom surface of the work space A formed by the net components 22A and 22B (see FIGS. 8 and 10).

  The paint scattering prevention device is installed on the arm 4 by the above-described process, and operates the opening / closing strings 23D and 24D to deploy the net components 22A and 22B forward, so that the arm 4 is surrounded. A work space A is formed (see FIG. 10). Conversely, when not working, the paint drop prevention sheet 26 is removed, the engagement ring 25 locking the lower edges of the left and right net members 22A and 22B is removed, and the lower side is shown by a broken line in FIG. Then, the net members 22A and 22B are pulled backward in the direction of the arrow B to reduce the size (see FIGS. 6 and 7), and are bound by a string or the like. This prevents the scattering prevention net 22 from being blown by the wind and coming into contact with the power transmission line or becoming a noise source, and also prevents the scattering prevention net 22 from tearing due to wind pressure.

  According to this process, the net frame 13 is installed on the tip end side of the arm 4 and the support ropes 23A, 23B, 24A, and 24B are stretched between the tower body 1 side and the net frame 13 only. Since the prevention net | network 22 can be provided, installation work is easy and it is excellent in safety.

It is explanatory drawing which shows the state which installed the coating material scattering prevention apparatus which concerns on embodiment of this invention in the power transmission tower. It is a top view of a frame support metal fitting. It is a side view of a frame support metal fitting. It is a perspective view of the net frame installed in the arm. It is a side view of the net frame installed in the arm. It is a top view of the state which installed the net frame in the arm. It is a side view of the state which installed the net frame in the arm. It is explanatory drawing of the state which hung the scattering prevention net on the support rope. It is explanatory drawing of the state which expand | deployed the scattering prevention net | network. FIG. 10 is an enlarged end view cut along the line XX in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tower body 4 Arm 5 Insulator 11 Frame support metal fitting 13 Net frame 22 Spattering prevention nets 23 and 24 Net expansion mechanisms 23A and 24A Upper support ropes 23B and 24B Lower support ropes 26 Paint fall prevention sheet A Work space

Claims (4)

  A power transmission tower that includes a tower body and a plurality of arms that are spaced apart in the height direction and project from the tower body in the lateral direction on the left and right sides, and that supports the power transmission line via an insulator provided on the tip side of the arm. A paint scattering prevention device for a power transmission tower for painting, a frame support fitting attached to the tower corresponding to the position of the arm, and a net installed on the tip side of the arm to form a work space A frame, a support cable stretched between the net frame and the frame support bracket, and a scatter that is deployed on the support cable from the arm to the net frame so as to surround the arm and form a work space. A paint scattering prevention device for painting power transmission towers, which consists of a prevention net.   2. The paint splash prevention device for painting a power transmission tower according to claim 1, wherein a work space formed by the splash prevention net has a paint fall prevention sheet laid on the bottom surface.   A power transmission tower comprising a tower body and a plurality of arms projecting laterally from the tower body in the left-right direction and spaced apart in the height direction, and supporting a power transmission line via an insulator provided on a tip side of each arm A method of painting a power transmission tower for painting a frame, a step of attaching a frame support bracket to the tower body corresponding to the position of the arm, and a net frame on the tip side of the arm to form a work space A step of installing a support cable between the net frame and the frame support bracket, and a scattering prevention net from the arm to the net frame so as to form a work space surrounding the arm. A power transmission tower painting method comprising a step of deploying a support line in a deployable manner and a step of painting the arm in a work space formed by the scattering prevention net. 4. The power tower according to claim 3, wherein a step of laying a paint drop prevention sheet on a bottom surface is performed after the scattering net is detachably mounted on the support rope to form the work space. Construction method.

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