JPH0616377U - Hanger for reversing the girder - Google Patents

Abstract

(57) [Abstract] [Purpose] To secure the safety of work by stabilizing the reversal work of the plate girder body accompanying the welding work of the plate girder body, and at the same time to improve the work efficiency and prevent damage to the plate girder. [Structure] Two claw supports that support a pair of claw bodies via pins are connected at intervals, and the pins are inserted through the same long holes of the claw body having a long hole at the base end. The structure in which a pair of claws are slidably supported by the support body allows the long hole of the claw body to be contacted when the claw body comes into contact with an accessory such as a stiffener on the plate girder body side during the work of reversing the plate girder body The part slides with respect to the pin, the claw body is pushed by an accessory such as a stiffener, and moves, and the reversing work is smoothly continued.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a hook-up girder inversion hook, and more particularly, to a hook-up girder inversion hook for efficiently and safely reversing a hook-up girder in a work process of welding an accessory such as a stiffener to a hook-up girder body.

[0002]

[Prior art]

 In the welding work of plate girders, the standard is fillet welding in which the welding surface is horizontal and the welding rod is downward. Then, in this welding process, accessories such as stiffeners and gussets are attached to the main body of the plate girder. In this welding process, the plate girder body is in each of the states of (a), (b), (c), (d), and (e) of FIG. The crane will invert four times so that all of them face upward. Further, since the work of reversing the main body 11 of the plate girder, a special inversion suspender has been used.

[0003] FIG. 7 shows a conventional hanging tool for inversion of a girder and a reversing operation using the hanging tool. As shown in FIG. 7 (a), after the downward fillet welding in this state is completed, as a preparation for welding the next surface, in order to invert the plate girder main body 11, the inversion hanging device 20 is hung on the plate girder main body 11. The state where the reversing hanger 20 is hung on the main winding hook 12 of the crane, the auxiliary hanger 14 is hung on the other side of the plate girder main body 11, and the auxiliary hanger 14 is hung on the auxiliary hook 15. In the same figure (b), the claw 24 of the reversing hanger 20 comes into contact with the stiffener 25 and the reversing work is hindered when the plate girder body 11 is lowered and tilted while the reversing hanger 20 is suspended. Indicates the status. FIG. 3C shows a state in which an operator climbs on the plate girder main body 11 to lift the pawl 24 and separates the pawl 24 from the stiffener 25. FIG. 11D shows a state in which the worker continues the reversing work while lifting the pawl 24, and the pawl 24 is separated from the stiffener 25 to smoothly perform the reversing work. FIG. 7E shows a state in which the auxiliary hook 15 is lifted and the plate girder body 11 is further inverted. The figure (f) shows the state in which the reversal is completed in the direction of 90 degrees from the state of the figure (a).

[0004]

[Problems to be solved by the device]

 However, the following problems occur in the above-described conventional inversion hanging device. First, when the plate girder main body 11 is reversed, the claws 24 come into contact with the stiffeners 25 to hinder the reversing work, which hinders the progress of the work, lowers the work efficiency, and causes the stiffeners 25 to be bent or flawed. Further, in order to make the reversing of the plate girder body 11 smooth, the worker climbs on the reversing plate girder body 11 and continues the reversing work while lifting the pawl 24 so that the pawl 24 does not contact the stiffener 25. There was a problem that it lacked safety and work stability.

The present invention solves the above problems and stabilizes the reversing operation of the plate girder body associated with the welding work of the plate girder body to ensure work safety, increase work efficiency, and prevent damage to the plate girder. The purpose is to do so.

[0006]

[Means for Solving the Problems]

 The hook for flipping the girder according to the present invention connects two claw supports that support a pair of claws via a pin at a distance, and connects them to the same long hole of the claw that has a long hole at the base end. The pair of claws are slidably supported by the claw support through the pins.

[0007]

[Action]

 With the hanging tool for inversion of the girder of the present invention, when the claw body comes into contact with an accessory such as the stiffener on the plate girder body side during the work of reversing the girder body, the long hole of the claw body slides against the pin. Then, the claw body is pushed by an accessory such as a stiffener and moves, and the reversal work continues smoothly.

[0008]

【Example】

 FIG. 1 is a perspective view of a suspender for inversion of a girder according to an embodiment of the present invention. In the suspension 1 shown in the figure, two plate-shaped claw supports 2 are fixed to the connecting member 3 by welding. Attached to the upper portion of the claw support 2 is a suspension ring 4 for attaching to a hook of a crane. In addition, a pin hole is provided in the lower portion of the claw support 2 so that the pin 5 can be inserted therethrough. Two pin supports 6 are connected to the claw support 2 via the pins 5, respectively. A pin hole is provided in the lower portion of the pin support body 6, and a pair of claw bodies 8 are attached to the pin support body 6 via the pin 7. The claw body 8 is designed so that the tip portion 9 can grip a plate girder or the like. A long hole 10 is provided at the base end portion of the claw body 8, the pin 7 is inserted into the long hole 10, and the claw body 8 is slidable with respect to the pin 7.

FIG. 2 shows a state in which the hanging tool 1 of FIG. 1 is attached to one side of the plate girder body 11 and the plate girder body 11 is gripped, and FIG. 3 shows the hanging tool 1 attached to the other side of the plate girder body 11. The figure shows a state in which the plate girder body 11 is gripped. In any case, the elongated hole 10 of the claw body 8 slides freely with respect to the pin 7 to ensure that the girder body 11 is matched to the shape and direction of the girder body 11 held by the pair of claw bodies 8. You can grab it.

Next, the operation of the suspender 1 configured as described above will be described. FIG. 4A shows a state in which the hanging tool 1 is hung by the hook 12 of the crane, the plate girder main body 11 is gripped, and the plate girder main body 11 is tilted down to the inclined position. When the plate girder main body 11 gradually approaches the horizontal state from this state, the tip end portion 9 of the claw 8 comes into contact with the stiffener 13 on the plate girder main body 11 side. Then, as shown in FIG. 4B, the claw body 8 is pushed by the stiffener 13 and the elongated hole portion 10 starts to move upward while sliding with respect to the pin 7. Then, when the reversing work is continued, as shown in FIG. 4 (c), the plate girder main body 11 further approaches the horizontal state, and as shown in FIG. 4 (d), the reversing work is completed. . In the figure, 14 is an auxiliary lifting device, and 15 is an auxiliary hook of a crane. In the hanging tool 1 of this embodiment, since each claw body 8 is provided with the elongated hole 10, no matter which claw body the tip end 9 of the stiffener comes into contact with, each claw body 8 freely moves and rolls. Work is done smoothly.

The time required to invert the plate girder body 11 once was 4 minutes in the case of the conventional hanging equipment, but it is 2 minutes and 30 seconds in the hanging equipment 1 of this embodiment. The time required for reversing work will be reduced to 1 minute and 30 seconds. If four inversions are performed for one plate girder main body, it will be shortened by 1.5 minutes × 4 times = 6 minutes per one plate girder body.

In the above embodiment, the claw support 2 and the pin support 6 are provided separately, but as shown in FIG. 5, the claw support 2 and the pin support 6 are provided. It is also possible to have a structure in which the claw support 16 integrally formed, one pin 17, the connecting member 18, and the claw body 8 are provided.

[0013]

[Effect of device]

 As described above, according to the present invention, in the work of reversing the plate girder body accompanying the welding work of the plate girder body, even when the lifting tool claw body comes into contact with the stiffener or the like on the plate girder body side, the claw body does not contact the support pin. Slide, the gripping shape of the pair of lifting tool claws can be changed freely, and the reversing work is not hindered, so the reversing work is stabilized, and the worker climbs up to the plate girder body as in the past, and the hindrance factor is The work of removing is unnecessary and the safety of reversing work is secured. In addition, since the work efficiency is improved and the main body of the steel girder is not damaged, the quality of the main body of the steel girder is guaranteed without the need for rework such as flaws and bends of accessories such as the main body of the steel girder and stiffener.

[Brief description of drawings]

FIG. 1 is a perspective view of a suspender for inversion of a girder according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a state in which the hanging tool of FIG. 1 is attached to one side of the plate girder body and the plate girder body is gripped.

FIG. 3 is an explanatory view showing a state where the hanging tool of FIG. 1 is attached to the other side of the plate girder body and the plate girder body is gripped.

FIG. 4 is a diagram showing a work of reversing a girder using the suspender of FIG. 1.

FIG. 5 is a perspective view showing a suspender according to another embodiment of the present invention.

FIG. 6 is a diagram showing a posture state of a plate girder main body during a welding operation process.

FIG. 7 is a view showing a work of reversing a girder using a conventional hanging tool.

[Explanation of symbols]

 1 Suspension Tool 2,16 Claw Support 3,18 Connecting Member 4 Suspension Ring 5 Pin 6 Pin Support 7,17 Pin 8 Claw Body 9 Tip of Claw Body 10 Long Hole 11 Girder Body 12 Crane Hook 13 Stiffener 14 Auxiliary Lifting equipment 15 Auxiliary hook for crane

Claims (1)

[Scope of utility model registration request] 1. A pair of claw supports for supporting a pair of claw bodies via a pin are connected at a distance, and the pin is inserted into the same long hole of the claw body having a long hole at its base end. A pair of hooks for flipping a girder, wherein a pair of claws are slidably supported on the claw support.