JPH02286593A - Hanging hook of steel pipe for steel tower - Google Patents

Abstract

PURPOSE:To remove a hanging wire from a steel pipe through operations from down below by so constituting to prevent the rotation of a pin receiving member while in a state that a pin is penetrated through the member, and to allow free rotation of the pin receiving member while the pin is pulled out. CONSTITUTION:When a hoisted steel pipe P is brought above other steel pipe P fixed into position, and their flanges (f) were brought face to face and temporarily tightened with bolts, a hanging wire W is loosened by operating a crane to set hooks 3 into a state of no load. When pins 4 are pulled out from pin receiving members 5 by pulling operating ropes 7 from above the ground surface or from around the connecting part of the flanges (f) while in that state, the pin receiving members 5 are set to freely rotate, loosing their supports. When the operating ropes 7 are furtherly pulled down, the pins 4 come off from the bolt insertion holes (h) of the flange (f), and the pin receiving members 5 abut on the top surface of the flange (f). At the same time, the pin receiving members 5 are pushed up to rotate, and to release the pins 4 from their main body 2, so that a hanging hook 1 can be easily removed off the flange (f).

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention is applicable to the construction of power transmission line towers, communication towers, weather observation towers, etc., when the steel pipes used to assemble the towers are lifted up by a crane. This invention relates to a hanging fitting for securing to a flange of a steel pipe.

(Prior Art) In a steel tower such as a power transmission line, four pillars are sometimes assembled by connecting steel pipes. This steel pipe is equipped with connecting flanges at both ends that have numerous bolt insertion holes. and,
When constructing a steel tower, these flanges are butted together, connected with bolts, and then assembled upwards one after another. Steel pipes are sequentially lifted and assembled using a crane, but conventionally,
To lock a crane's suspension wire to a steel pipe, attach an eye bolt to the bolt insertion hole of the flange and hang the hook of the suspension wire on this, or hang the shackle at the end of the suspension wire directly to the bolt insertion hole of the flange. Alternatively, methods such as winding a suspension wire directly around a steel pipe have been used.

When using this method, after securing the lifted steel pipe with bolts, a worker must climb up the steel pipe and remove the lifting wire from the steel pipe, and during this time the crane must stop and wait.

(Problems to be Solved by the Invention) The above-mentioned conventional method for hanging and stopping hanging wires is extremely inefficient.

Therefore, in the present invention, once the hoisted steel pipe is temporarily fixed on the lower steel pipe, the lifting wire can be immediately removed from the steel pipe by operating from below, eliminating the need for the worker to climb up the steel pipe, and reducing crane standby time. The object of the present invention is to provide a hanging fitting for steel pipes that can be shortened as much as possible.

(Means for Solving the Problems) In the present invention, in order to solve the above problems, a puller 3 is attached to the main body 2 for locking to the hanging wire W of the crane, and an insertion bin 4 is attached to the main body 2. The pin receiving member 5 is attached to the main body 2, and the tip of the insertion pin 4 is inserted into the main body 2 so as to be movable in the axial direction. A closed loop can be formed between the insertion pin 4 and the main body 2 with the tip of the insertion pin 4 inserted and removed freely. An operating rope 7 for pulling out the insertion pin 4 is secured to the proximal end of the insertion pin 4, and the puller 3 and the pin receiving member 5 are attached to the main body so as to rotate integrally with each other. 2, and the mutual extension angle is set so that when the puller 3 receives a load, a rotational moment is generated and the pin receiving member 5 maintains the engaged state with the pin 4, and the pin 4 is connected to the pin 4. When the pin 4 passes through the receiving member 5, it comes into contact with the pin receiving member 5 to prevent its rotation, but when the pin 4 comes out of the pin receiving member 5, the pin receiving member 5 freely rotates. The mutual relationship between the pin 4 and the through hole 15 of the pin receiving member 5 is set so that a closed loop can be opened.

(Function) As shown in FIG. 3, the hanging fitting 1 of the present invention is used by being attached to the tip of a hanging wire W of a crane in order to lift the III pipe P. The hanging fitting 1 is attached to a flange f of a steel pipe P lying on the ground, as shown in FIG. 4A. The steel pipe P is attached to the flange f in the following manner. First, the pin 4 is pulled out from the pin receiving member 5 against the urging force of the urging member 6, and the pin receiving member 5 is rotated clockwise in FIG. (phantom line in Figure 1). Then, insert the tip end of the pin 4 into the bolt insertion hole of the flange f. Next, with the pin 4 still pulled out, the pin receiving member 5 is rotated together with the pull handle 3 in the clockwise direction in FIG. 5 to close the space between the pin 4 and the main body 2. In this state, the pin receiving member 5 cannot be rotated because the pin 4 passing through it is obstructed. Therefore, pin 4
The space between and the main body 2 cannot be opened unless the pin 4 is pulled out, so that the hanging fitting does not naturally fall off from the flange f. After the hanging fittings are attached to the steel pipe P in this manner, the steel pipe P is lifted up by a crane as shown in FIG. When the steel pipe P is lifted and the puller 3 is receiving a load, the pin receiving member 5 integrated with the puller 3
A rotation moment is generated, and the pin receiving member 5 maintains the engaged state with the pin 4. Therefore, the space between the pin 4 and the main body 2 does not open, and the hanging fitting falls off from the flange f. Never. Bring the lifted steel pipe P onto another fixed steel pipe P.

After the flanges f are butted together and temporarily fastened with bolts, the crane is operated to loosen the hanging wire W and the puller 3 is placed in an unloaded state. In this condition, as shown in FIG.
loses its support and becomes free to rotate. Therefore, the operation rope 7
When further pulled, the pin 4 comes out of the bolt insertion hole of the flange f, and the five-pin receiving member 5 comes into contact with the upper surface of the flange f, as shown in FIG. 4C'. At the same time, the pin receiving member 5 is pushed up relatively by the upper surface of the flange f and rotates counterclockwise in FIG. 1 can be easily removed from the flange f.

(Example) The present invention will be described in detail with reference to the figures. Figure 1 is a front view of the hanging bracket, Figure 2 is a side view of the hanging bracket, Figure 3 is a front view of the steel pipe being lifted, Figure 4A is an explanatory diagram showing the hanging bracket being installed, Figure 4 B.

C and D are explanatory diagrams showing the process of removing the hanging fitting in order.

In FIGS. 1 to 4, the hanging fitting 1 includes an L-shaped main body 2, a puller 3 attached to the main body 2 for locking to a hanging wire W of a crane, and an axis line of the main body 2. The insertion pin 4 is inserted into the main body 2 so that the tip of the insertion pin 4 can be freely inserted and removed.
a pin receiving member 5 attached to the main body 2; a biasing member 6 attached to the main body 2 so as to bias the insertion pin 4 toward the distal end;
It is provided with an operating rope 7 that is latched to the base end side of the insertion pin in order to pull out the insertion pin.

The main body 2 is composed of a hook part 8 that is hung on a flange part f of a steel pipe P, and a hanging branch 9 that extends at right angles from one end of the hook part 8, and has a substantially L-shape as a whole. An elastic member 16 made of rubber, urethane, etc. is attached to the portion of the main body 2 that comes into contact with the steel pipe P in order to prevent damage to the steel pipe P.

The insertion pin 4 passes through the hook portion 8 of the main body 2 so as to be movable in the axial direction and rotatable in the forward and reverse directions around the axis within a range of 90 degrees. The insertion pin 4 passing through the hook portion 8 extends parallel to the hanging support 9, and its tip end can be inserted into the bolt insertion hole of the flange portion f.

The proximal end of the insertion pin 4 is prevented from coming off in the distal direction with respect to the hook portion 8 by a stopper 10. The proximal side surface of the insertion pin 4 is provided with a guide groove 11 extending in the axial direction, and an engagement groove 12 extending continuously from the tip of the guide groove in a perpendicular direction and extending over a quarter circumference of the pin 4. ing. On the other hand, a stopper pin 13 is provided in the hook portion 8 with its tip biased in the direction of the pin 4, and its tip is slidably fitted into the grooves 11 and 12 of the pin 4. Therefore, when the insertion pin 4 is pulled out in the axial direction toward the proximal end, the stopper pin 13 relatively slides along the guide groove 11 and reaches the tip of the guide groove 11 to prevent the insertion pin 4 from being pulled out. Now, if the insertion pin 4 is rotated 90 degrees around the axis,
The stopper pin 13 enters into the engagement groove 12 and prevents the insertion pin 4 from returning to its original state in this state.

The puller 3 and the pin receiving member 5 are integrally formed via the boss 14, and the 6-pin receiving member 5 rotatably attached to one end of the hanging portion 9 of the main body 2 is connected to the hanging portion 9. A pin receiving hole 14 is provided which extends perpendicularly to the pin receiving hole 14 and allows the tip of the insertion pin 4 to pass through the pin receiving hole 14. The puller 3 and the pin receiving member 5 extend in the radial direction from the boss 14 at a predetermined angle, and when the puller 3 receives a load, a rotational moment is generated in the pin receiving member 5 and the pin receiving member 5 is set so as to maintain the engagement state with the insertion pin 4. The angle between the puller 3 and the pin receiving member 5 depends on the angle between the hanging wire W and the main body 2 during lifting. Furthermore, when the insertion pin 4 passes through the hole 15 of the pin receiving member 5, the pin 4 comes into contact with the inner periphery of the hole 15.
The pin receiving member 5 cannot rotate, and when the pin 4 is pulled out from the pin receiving member 5, the pin receiving member 5 cannot be rotated.
The dimensions are set so that the pin 4 can freely rotate to open the space between the pin 4 and the main body 1 (phantom line in FIG. 1).

The biasing member 6 is made of a clockwork spring and is provided within the main body 2. One end of the mainspring spring is locked to the main body 2, and the other end is locked to the stopper 10, respectively, and urges the insertion pin 4 toward the distal end side.

An operating rope 7 is locked to the proximal end of the insertion pin 4. The operating rope 7 hangs downward, and by pulling it from below, the tip side of the insertion pin 4 can be pulled out from the pin receiving member 5.

As shown in FIG. 3, the hanging fitting 1 of this embodiment is used by being attached to the tip of a lifting wire W of a crane in order to lift a steel pipe P. The hanging fitting 1 is attached to a flange f of a steel pipe P lying on the ground, as shown in FIG. 4A. The steel pipe P is attached to the flange f in the following manner. First, the insertion pin 4 is pulled out from the pin receiving member 5 against the biasing force of the biasing member 6, rotated by 90 degrees, and the stopper pin 12 of the main body 2 is engaged with the engagement groove 12 of the pin 4.
Fix the insertion pin 4. Then, the pin receiving member 5 is rotated together with the pull handle 3 clockwise in FIG. 1 to open the space between the pin 4 and the main body 2 (phantom line in FIG. 1). Then, insert the tip end of the pin 4 into the bolt insertion hole of the flange f (Fig. 4A).

Next, after rotating the pin 4 and the pin receiving member 5 together with the puller 3 in the clockwise direction in FIG. The pin 4 is uncoupled and restored by a biasing force, and the distal end thereof is passed through the pin receiving member 5, thereby closing the space between the pin 4 and the main body 2 (FIG. 3).

In this state, the pin receiving member 5 cannot be rotated because the pin 4 passing through it is obstructed.

Therefore, the space between the pin 4 and the main body 2 cannot be opened unless the pin 4 is pulled out, so that the hanging fitting does not naturally fall off from the flange f. After the hanging fitting 1 is attached to the steel pipe P in this manner, the steel pipe P is lifted up by a crane as shown in FIG. When the steel pipe P is lifted and the puller 3 is receiving a load, a rotational moment is generated in the pin receiving member 5 which is integrated with the puller 3, and the pin receiving member 5 maintains the engaged state with the pin 4. , the space between the pin 4 and the main body 2 will not open, and the hanging fitting will not fall off from the flange f.

Bring the lifted steel pipe P onto another fixed steel pipe P, butt the flanges fl, and temporarily fasten them with bolts. Operate the crane to loosen the lifting wire W and put the puller 3 in an unloaded state. do. In this state, as shown in FIG. 4B, when the operating rope 7 is pulled from the ground or near the connection of the flange f and the pin 4 is pulled out from the pin receiving member 5, the pin receiving member 5 loses its support and is free to rotate. become. Then, when the operating rope 7 is further pulled, the pin 4 comes out of the bolt insertion hole of the flange f, and the pin receiving member 5 comes into contact with the upper surface of the flange f, as shown in FIG. 4C.6 At the same time, the pin receiving member 5 is relatively pushed up by the upper surface of the flange f and the first
It rotates counterclockwise in the figure, and the space between the pin 4 and the main body 2 is opened, and as shown in the fourth diagram, the hanging fitting 1 is attached to the flange f.
It comes off easily.

FIG. 5 shows another embodiment of the invention. In the figure, the same reference numerals as in the previous embodiment refer to substantially the same components. This embodiment can also be applied to the case where the steel pipe P is lifted by a method different from that of the previous embodiment, as shown in FIG. That is, in the construction of a steel tower, there are cases where steel pipes P are assembled in advance and hoisted, as shown in FIG. In this case,
The angle between the hanging wire W and the main body 2 of the hanging fitting 1 is the third
Since this is different from the case of the embodiment shown in the figure, if the hanging fitting 1 of the previous embodiment is used, when the steel pipe P is lifted, the pin receiving member 5 will receive a rotational force in the direction of coming off the pin 4.
Therefore, in this embodiment, the pull handle 3 is configured in a fan shape so that the angle between the pull handle 3 and the pin receiving member 5 can be substantially changed. Two different wire locking holes 17 and 18 were provided. Locking hole 1
If the hanging wire W is locked to 7, it can be used in the same manner as in the previous embodiment. Then, attach the hanging wire W to the locking hole 18.
If the pin 4 is locked, even when the lifting method shown in FIG. 6 is used, a rotational moment is generated in the pin receiving member 5 in a direction to maintain the engaged state with the pin 4, so that it can be used safely. In the embodiment of FIG. 5, the biasing member 6 consists of a coil spring. In FIG. 5, the same reference numerals as those in FIGS. 1 to 4 refer to the same elliptical parts.

(Effects of the Invention) As described above, in the present invention, the main body 2 is provided with a puller 3 for locking the suspension wire W of the crane, and the insertion pin 4 is inserted through the main body 2 so as to be movable in the axial direction. The main body 2 is fitted with a pin receiving member 5, through which the distal end of the insertion pin 4 can be freely inserted and removed. , so that a closed loop can be formed between the insertion pin 4 and the main body 2 in a state where the distal end thereof is penetrated, and the insertion pin 4 is urged toward the distal end side by a biasing member 6 such as a spring, The insertion pin 4 is attached to the proximal end of the insertion pin 4.
The operating rope 7 for pulling out is locked, and the puller 3 and pin receiving member 5 are pivoted to the main body 2 so as to rotate integrally with each other, and when the puller 3 receives a load, a rotational moment is generated. The mutual extension angle is set so that the pin receiving member 5 maintains the engaged state with the pin 4, and when the pin 4 passes through the pin receiving member 5, the pin 4 abuts on the pin receiving member 5. The through hole between the pin 4 and the pin receiving member 5 prevents the rotation, but allows the pin receiving member 5 to freely rotate and open a closed loop when the pin 4 is pulled out of the pin receiving member 5. Since the hanging fittings for steel pipes for steel towers are configured by setting the mutual relationship with 15, once the lifted steel pipe P is temporarily fixed on the steel pipe P below, the worker can immediately operate it from below without having to climb the tower. The suspension wire W can be removed from the steel pipe P, and the crane's standby time can be shortened as much as possible.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a front view of the hanging fitting, Fig. 2 is a side view of the hanging fitting, Fig. 3 is a front view of the steel pipe in a suspended state, and Fig. 4A is the hanging fitting. FIG. 4B is an explanatory view showing the state of the installation work. C and D are explanatory diagrams showing the step-by-step process of removing the hanging fittings, FIG. 5 is a front view showing another embodiment of the present invention, and FIG. 6 is an explanatory diagram showing another method for lifting a steel pipe. 7 ・ f ・ h ・ P ・ W・ Operation rope flange Bolt insertion hole Steel pipe hanging wire・Hanging fitting・Main body・Puller・Insertion pin・Pin receiving member・Biasing member figure"'

Claims (2)

[Claims] (1) A lifting fitting for hoisting a steel tower steel pipe with a large number of bolt insertion holes in the connecting flanges at both ends, which is connected to a main body supporting the load of the steel pipe and a lifting wire of the crane. a puller attached to the main body in order to stop the puller; and a puller that passes through the main body movably in the axial direction, a distal end protruding from the main body can be inserted into a bolt insertion hole of the steel pipe, and a proximal end is attached to the main body. The main body is configured such that a closed loop can be formed between the insertion pin that is prevented from coming off, and the main body with the tip of the insertion pin inserted and removed freely. an attached pin receiving member; an urging member attached to the main body so as to urge the insertion pin toward the distal end side; and a bolt of the steel pipe when the distal end side of the insertion pin is pulled out from the pin receiving member. To pull it out from the insertion hole,
an operating rope latched to the proximal end side of the insertion pin; the puller and the pin receiving member are pivotally connected to the main body so as to be able to rotate integrally with each other; and the puller rotates when the puller receives a load. The mutual extension angle is set such that a moment is generated and the pin receiving member maintains an engaged state with the pin, and in a state where the pin passes through the pin receiving member,
The pin comes into contact with the pin receiving member and prevents its rotation, but
A mutual relationship between the pin and the through hole of the pin receiving member is set so that the pin receiving member can freely rotate to open the closed loop when the pin is pulled out of the pin receiving member. Hanging fittings for steel pipes for steel towers. (2) A steel tower characterized in that the puller is provided with a plurality of hanging wire locking portions having different angles with the pin receiving member so that the mutual angle with the pin receiving member can be substantially changed. Hanging fittings for steel pipes.