JP6210453B2 - Branch mounting bracket for angle tower - Google Patents

Description

  In the construction work of the angle tower, the mast for fixing the climbing crane to the upper part is provided inside the angle tower, and the mast extending according to the height of the tower is connected to the angle tower under construction. The present invention relates to a branch line mounting bracket for locking a branch line for preventing a fall to an angle steel tower.

  Conventionally, as a method for constructing a steel pipe tower, there is a method in which a mast with a climbing crane fixed to the upper part is provided inside a main pillar of a steel tower under construction, and the mast is sequentially raised according to the progress of assembling the steel tower (Patent Document 1). ). The mast is connected to the main pillar of the steel tower horizontally with a wire rope to prevent the mast from falling. One end of this wire rope is connected to a guide frame that surrounds the mast, and the other end is wound around the main column with a retaining wire and locked to the pulls at both ends, or the wire rope is directly wound around and locked to the main column. .

JP 06-093761 A

When the conventional steel pipe tower assembly method is applied to an angle tower and a retaining wire or wire rope is wound around the angle material constituting the main column, the load concentrates on the bent portion of the retaining wire and the strength is increased by the kink. There is a risk of lowering and incurring these breaks. In order to prevent the retaining wire etc. from coming into direct contact with the angle material, even if a cushioning material such as a dongle is wrapped around the main pillar, or even if a cushioning material is wrapped around the inside of the main pillar, When a large tension is applied, stress concentrates at the corners of the angle member and excessive bending occurs locally, resulting in kinks and insufficient strength. In particular, when tension is applied to the inclined wire rope, the cushioning material may slide on the main column and the wire rope may become slack. The operation of winding the wire rope around the angle member through the cushioning material and the heavy log requires a large amount of labor involving a plurality of workers and is not easy.
Therefore, the present invention simplifies the work of connecting the branch line connecting the mast supporting the climbing crane to the main column of the angle tower, reduces the work labor, and reduces the strength due to kink at the connecting part of the branch line or due to slippage. An object of the present invention is to provide a branch line mounting bracket for an angle steel tower that prevents loosening.

The branch line mounting bracket for an angle steel tower according to the present invention has a climbing crane fixed to the top, a mast M that is arranged inside the angle steel tower T and extends upward according to the height of the steel tower T. The guide frame G, which can be fed upward at the height position and fixed in the horizontal direction, or the frame B which supports the base of the mast M is connected to the angle tower T under construction by branch lines W1, W2, W3. When installing, attach to the main pillar of the angle steel tower T. The branch line mounting bracket 1 has a substantially L-shaped cross section along the side surface portion of the angle member T1 constituting the main pillar, and a pair of inner and outer clamps which are clamped with bolts 4 and nuts 5 and are coupled to each other. The plates 2 and 3 are provided, and the inner clamp plate 3 is provided with a connection portion 9 that faces the mast M and can be connected to the connection fitting S.
At one end of the outer clamp plate 2, a long hole 6 is provided through which the bolt 4 penetrating the inner clamp plate 3 is passed, and the angle member T <b> 1 is placed between the other end of the inner clamp plate 3 and the outer clamp plate 2. The clamp plates 2 and 3 are integrated with each other by being movable between an acceptable separation position and an approach position where the inner clamp plate 3 is bolted, and the bolt 4 is passed through the long hole 6 and the nut 5 is screwed. To join.
An inclined portion 8 is provided at one end of the outer clamp plate 2 having the long hole 6 so that the relative angle with the inner clamp plate 3 is enlarged and the distance from the inner clamp plate 3 is increased at the other end.
At the other end of the outer clamp plate 2, a long hole 7 is provided through which the bolt 4 penetrating the inner clamp plate 3 can be inserted at a position deviated from the vertical position.
An anti-slip sheet 12 is provided at a portion of the clamp plates 2 and 3 facing the angle member T1.
A spacer 10 that is penetrated by the bolt 4 and secures a predetermined mutual interval is screwed onto the clamp plates 2 and 3.
A plurality of connection holes 9 a for connecting a plurality of branch lines W 1, W 2, W 3 are provided in the connection portions 9 of both the clamp plates 2, 3.

  In the present invention, the mounting bracket can be easily and surely attached to the main column member, and the labor for attaching the branch line is greatly reduced, and the branch line does not come into contact with the angle member. There is no concentration of partial load on the main body, preventing a decrease in strength, and fixing securely without slipping on the main column, and preventing loosening of the branch line. Both clamp plates can be joined together via bolts and nuts to prevent loss of members due to separation or dropping off at high places.

It is a perspective view of the branch line attachment metal fitting concerning the present invention. FIG. 2 is a plan view of the branch line mounting bracket of FIG. FIG. 2 is a front view of the branch line mounting bracket of FIG. It is a perspective view of the branch line attachment metal fitting before mounting. It is a perspective view of the branch line attachment metal fitting of other embodiments. It is a front view of the branch line attachment metal fitting of FIG. It is a perspective view of the branch line attachment metal fitting before mounting. It is the schematic of the use condition of a branch line attachment metal fitting.

An embodiment of the present invention will be described with reference to the drawings.
In FIG. 8, the angle steel tower T has a mast M on the inner side of the main pillars at the four corners, and the construction work proceeds with a climbing crane at the top while sequentially extending the mast by the lifting method. The mast M is inserted into a guide frame G supported by a branch line W1 such as a wire rope extending horizontally from the main pillar of the angle steel tower T at a predetermined height so as to be able to be sent upward, thereby preventing a fall. That is, one end of the branch line W1 is connected to the guide frame G, and the other end is connected to the angle member T1 constituting the main pillar of the angle tower T. The shackle S, which is a connection fitting at the tip of the branch line W, is connected to the branch line fitting 1 attached to the angle member T1.

  1 to 3, the branch line fitting 1 includes an outer clamp plate 2 and an inner clamp plate 3 for sandwiching the angle member T1 inside and outside, and a bolt 4 and a nut 5 for fastening both the clamp plates 2 and 3 together. The outer clamp plate 2 is formed of a steel plate bent in a substantially L-shaped cross section that extends along the outer surface portion of the angle member T1. Both ends of the outer clamp plate 2 are provided with long holes 6 and 7 in the longitudinal direction for allowing the bolts 4 to pass therethrough. One end portion of the outer clamp plate 2 includes an inclined portion 8 that rises outside the bend.

  The inner clamp plate 3 has a substantially L-shaped cross section that rises from an intermediate portion so that both end portions are along the inner side surface portion of the angle member T1. The inner clamp plate 3 is coupled integrally with the outer clamp plate 2 by passing bolts 4 through both ends. As shown in FIGS. 1 and 4, the inner clamp plate 3 is handled in a state of being connected to the outer clamp plate 2 by screwing a nut 5 into a bolt 4 penetrating through one long hole 6 of the outer clamp plate 2. It is. The inner clamp plate 3 can be moved relative to the outer clamp plate 2 through the long hole 6 in a horizontal direction between a separated position where the angle member T1 can be received and an approach position where the inner clamp plate 3 is tightened with the bolt 4. Moreover, the space | interval which receives the angle material T1 can be expanded for the inner clamp board 3 by expanding the connection angle with respect to the outer clamp board 2 by the inclination part 8. FIG. The intermediate portion of the inner clamp plate 3 is provided with a handle 9 provided so as to protrude toward the inside of the bend. The pull handle 9 includes a connection hole 9a for locking the shackle S at the tip of the branch line W.

  The bolt 4 penetrates both end portions of the outer clamp plate 2 and the inner clamp plate 3 outside the angle member T1. A spacer 10 disposed between the outer clamp plate 2 and the inner clamp plate 3 at the inner position of the nut 5 is screwed into the bolt 4. A split pin 11 for preventing the nut 5 from coming off is inserted into a shaft end portion of the bolt 4 penetrating the long hole 6.

  On the opposing surfaces of the outer clamp plate 2 and the inner clamp plate 3, a non-slip sheet 12 made of an elastic synthetic resin is attached to a portion in contact with the angle member T <b> 1.

This branch line fitting 1 is attached to the angle member T1 in order to lock the branch line W1 connecting the angle tower T and the mast M to the angle tower T in the construction work of the angle tower T. In the unused state as shown in FIG. 4, the branch line fitting 1 is made to pass through a bolt 4 through one end of the inner clamp plate 3 in advance, and through a long hole 6 of the outer clamp 2 via a spacer 10. And the inner clamp plate 3 is coupled to the outer clamp 2 with the split pin 11 inserted.
The inner clamp plate 3 moves relative to the outer clamp 2 in the range of the long hole 6 on one end side, and the relative angle with the outer clamp plate 2 increases at the inclined portion 8 of the outer clamp 2. The angle member T1 is easily received by widening the gap with the outer clamp 2 in FIG.
When the angle member T1 is disposed between the inner clamp plate 3 and the outer clamp plate 2 and the bolt 4 is passed through the other end portion of the outer clamp plate 2, the bolt 4 comes off the vertical position with respect to the outer clamp plate 2. It can be inserted into the long hole 7 even at a different position.
The branch fitting 1 can be securely fixed to the angle member T1 by sandwiching the angle member T1 between the outer clamp plate 2 and the inner clamp plate 3 and tightening both bolts 4 with the nut 5. When the mounting bracket 1 is attached to the angle member T1, the branch line W1 can be locked if the shackle S is hooked on the handle 9.
In addition, the bolt 4 which stops the other end part of the outer clamp plate 2 and the inner clamp plate 3 and the spacer 10 attached thereto are separated if they are assembled integrally with the inner clamp plate 3 before being attached to the angle member T1. Easy to handle.

Another embodiment is shown in FIGS. In the figure, the same components as those in the previous embodiment are denoted by the same reference numerals and description thereof is omitted.
Both the inner and outer clamp plates 2 and 3 of the branch mounting bracket 13 are configured to be wider than those in the previous embodiment, and bolts 4 and nuts 5 and spacers 10 attached to the bolts 4 are attached to the handle 9 in two directions. Two upper and lower connection holes 9a are provided. Therefore, the ground support line W2 and the oblique ground support line W3 can be connected to the single support line mounting bracket 13 on the support base B at the base of the mast M, thereby preventing a lateral shift or an overturn of the mast during an earthquake or the like.

DESCRIPTION OF SYMBOLS 1 Branch line mounting bracket 2 Outer clamp board 3 Inner clamp board 4 Bolt 5 Nut 6 Long hole 7 Long hole 8 Inclined part 9 Pull 9a Connection hole 10 Spacer 11 Split pin 12 Non-slip sheet T Angle steel tower T1 Angle material M Mast W1 Branch line W2 Branch line W3 Shade branch line S Shackle

Claims (6)

A climbing crane for constructing an angle tower is fixed to the upper part and is placed inside the angle tower under construction. The mast extends upward according to the height of the tower, and the mast is moved upward at a predetermined height. Either a guide frame that can be sent out to the frame and fixed horizontally, or a frame that supports the base of the mast, is connected to the angle tower under construction, and a branch line that prevents the mast from overturning or laterally shifting is connected to the angle tower. A branch line mounting bracket for locking to the main pillar with a connecting bracket such as a shackle,
It comprises a pair of inner and outer clamp plates that are substantially L-shaped along the side surface portion of the angle member that constitutes the main pillar, are sandwiched by the angle member and fastened with bolts,
The inner clamp plate is provided with a connection portion that can be connected to the connection fitting facing the mast,
The one end portion of the outer clamp plate is penetrated by the bolt penetrating the one end portion of the inner clamp plate, and the angle member can be received between the other end portion of the inner clamp plate and the outer clamp plate. It has a long hole that is relatively movable between the separation position and the approach position for bolting to the outer clamp plate,
Branch mounting bracket for angle towers both clamping plate by retained by screwing the nut to the elongated hole in the bolt passing through the characterized by Rukoto coupled together. One end of the outer clamping plate having the slot is characterized that you provided an inclined portion to expand the distance between the inner clamping plate at the other end by expanding the relative angle between the inner clamping plate The branch line mounting bracket for an angle steel tower according to claim 1. The angle steel tower according to claim 2 , wherein the other end of the outer clamp plate is provided with a long hole through which the bolt penetrating the inner clamp plate can be inserted at a position deviated from a vertical position . Branch wire mounting bracket. The branch line mounting bracket for an angle steel tower according to any one of claims 1 to 3 , wherein an anti-slip sheet is provided at a portion of the clamp plates facing the angle member . The branch line mounting bracket for an angle steel tower according to any one of claims 1 to 4 , further comprising a spacer penetrating the bolt and securing a predetermined mutual distance between both clamp plates . The branch line mounting bracket for an angle steel tower according to any one of claims 1 to 5 , wherein the connection portion of the inner clamp plate includes a plurality of connection holes for connecting a plurality of branch lines .

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