JPH0549190U - Jig for assembling crane box girder - Google Patents

Abstract

(57) [Abstract] [Purpose] A jig used to control the position of plate materials when welding plate materials and manufacturing cross girders (box girders) of rectangular cross sections for portal cranes and overhead cranes. Therefore, it is an object of the present invention to provide a jig capable of accurately controlling the position of a plate member of a box girder that is designed so that the center is slightly raised. [Structure] A plurality of L-shaped frames 3 along the longitudinal direction of the base 2.
And the horizontal platen 11 having flexibility is placed on the upper surface of the horizontal portion 9. The horizontal surface plate 11 is supported by a spring 13 in a state of being lifted from the horizontal portion 9 of the L-shaped frame. Further, a carrier 16 that runs in the longitudinal direction of the base 2 is provided, and horizontal pushers 24 and 24u that advance toward the vertical portion 4 of the L-shaped frame are attached to the carrier 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a jig used to control the positions of plate materials when they are manufactured by welding the plate materials to produce a transverse girder (referred to as "box girder" in this specification) having a rectangular cross section of a gate crane or an overhead crane. It is about.

[0002]

[Prior Art]

 As shown in FIG. 4, the box girder of the crane is constructed by welding upper and lower flange plates 31u, 31d and left and right web plates 32L, 32R in a rectangular cross section, and for adjusting the cross sectional shape inside thereof. The diaphragm plates 33 are arranged at regular intervals. The box girder is designed so that it is slightly elastically deformed and becomes horizontal when the load of the hoisting truck running along it is applied, and that the center of the girder is slightly centered when there is no load. Therefore, the web plate 32 of the box girder is cut into a shape in which the upper edge of the web plate 32 is slightly raised.

Conventionally, when temporarily assembling the box girder by welding, the upper flange plate 31u is placed on the surface plate, the left and right web plates 32L and 32R and the diaphragm plate 33 are suspended by a crane, and both web plates 32L, The upper flange plate 31u and the connecting portions 34, 34 of the left and right web plates 32L, 32R are temporarily welded in a state in which the 32R is pressed against the diaphragm plate 33 from both sides, and further, the diaphragm plate 33, the upper flange plate 31u and the left and right web plates. Weld the 32L and 32R by sequentially inserting the diaphragm plates 33 one by one in the longitudinal direction of the box girder and welding them. After assembling all the diaphragm plates 33, place the lower flange plate 31d. The procedure is such that the connecting portions 35, 35 with the left and right web plates 32L, 32R are temporarily welded.

[0004]

[Problems to be solved by the device]

 When assembling the box girder by the conventional method as described above, a plurality of cranes are required to lift the web plates 32L and 32R and the diaphragm plate 33, and the crane operator, the welding operator, and the auxiliary work for holding the plate material. This requires multiple workers such as workers, and since the web plate and diaphragm plate must be held vertically in contact with the upper flange plate until the temporary welding is completed, the crane operator must be trained to The required skills were required.

Further, in the above-mentioned conventional method, in order to form the box girder in a slightly middle height, a jig for inserting spacers at both longitudinal ends of the upper flange plate 31u and supporting it in a slightly curved state, and a web plate in a vertical state. Work is carried out using a jig held by. However, conventional jigs have problems that they require complicated adjustment work each time the box girder length and bending amount differ, and that the number of workers and the required skill level during welding work cannot be reduced. It was

This invention can easily cope with changes in the length and bending amount of the box girder, and can temporarily weld the box girder to an easy and accurate shape by one crane and one welding operator. The challenge is to provide a jig that can.

[0007]

[Means for Solving the Problems]

 The jig of this invention comprises a plurality of L-shaped frames 3 arranged at intervals along the longitudinal direction of the base 2, and the horizontal part 9 of the L-shaped frame 3 has an upper surface on which the base 2 is mounted. On the inside of the vertical portion 4 of the L-shaped frame 3, there is a slender vertical surface plate 6 which is elongated in the longitudinal direction of the base 2 and is mounted on each of the L-shaped frames. It is fixedly provided so as to connect the frames 3.

The horizontal surface plate 11 is supported between the horizontal portion 9 of the L-shaped frame or the base 2 via a spring 13, and a load is applied to the horizontal surface plate 11 by the biasing force of the spring 13. When not applied, the horizontal surface plate 11 is supported in a state of being lifted from the horizontal portion 9 of the L-shaped frame.

On the other hand, rails 15 and 15 are provided in parallel with the longitudinal direction of the base 2, and a carrier 16 that runs on the rails 15 and 15 is provided. The carrier 16 has an inverted L-shaped column 17 that faces the L-shaped frame 3 with a working space 27 in between, and a horizontal pusher 24 that advances toward the vertical portion 4 of the L-shaped frame in this column. , 24u are installed. At least two horizontal pushers 24, 24u are provided on the upper and lower sides, and the upper horizontal pusher 24u can change its mounting position according to the height of the box girder temporarily assembled.

More preferably, a vertical pusher 25 that vertically advances is provided on the transfer table 16 so that the lower flange plate 31d can be pressed from above.

[0011]

[Action]

 When the box girders are temporarily welded, the upper flange plate 31u is placed on the horizontal surface plate 11 and one of the web plates 32L is erected upright along the vertical surface plate 6, and its lower edge (when temporarily assembled) The upper plate) and the vertical platen 6 are fastened together by a C clamp 28 or the like, and the one web plate 32L is fixed in a state of being placed on the upper flange plate 31u. At this time, the horizontal platen 11 has a central spring 13 compressed by the weight of the upper flange plate 31u and the web plate 32L placed on the horizontal platen 11 of the L-shaped frame. On the other hand, both ends of the horizontal surface plate 11 are lifted by the force of the spring 13 because the weight of the web plate 32L does not act, and the upper flange plate 31u moves the upper edge of the web plate 32L (at the time of welding). It is curved so as to contact the lower edge).

In this state, the diaphragm plate 33 is temporarily welded and attached to both the upper flange plate 31u and one web plate 32L fixed to the vertical surface plate 6, and the web plate 32R on the opposite side is lifted by a crane. , Lower it onto the upper flange plate 31u. Then, the carrier 16 is moved so that the horizontal pushers 24 and 24u provided on the column 17 of the carrier are located at the mounting position of the diaphragm plate 33, and the horizontal pushers 24 and 24u are extended to newly hang down the web plate 32R. Is pressed against the diaphragm plate 33. In this state, the connecting portions 34, 34 of the upper flange plate 31u and the web plates 32L, 32R are temporarily welded together, and the diaphragm plate 33 and the upper flange plate 31u and the web plates 32L, 32R are welded. To do. Then, the carrier 16 is moved to perform temporary welding of the upper flange plate 31u and the two web plates 32L and 32R at the positions of the plurality of diaphragm plates 33 and welding of the diaphragm plates 33, and then the lower flange plate 31d is hung. The lower flange plate 31d is pressed from above by the vertical pusher 25 at the position of each diaphragm plate and the connecting portions 35, 35 of the lower flange plate 31d and the web plates 32L, 32R are connected to each other. Perform temporary welding.

The box girder temporarily assembled in this way is transported to another place, and the connection portions 34 to 35 of the upper and lower flange plates 31u and 31d and the left and right web plates 32L and 32R are subjected to main welding to complete the box girder. To be done.

[0014]

【Example】

 1 to 3 are views showing an embodiment of the present invention. A base 2 made up of two parallel girder members 1, 1 having an H-shaped cross section is provided in a direction along the longitudinal direction of the box girder to be assembled, and a plurality of L-shaped members are provided on the upper surface thereof at appropriate intervals. The frame 3 is placed and fixed. Inside the vertical portion 4 of the L-shaped frame, a vertical surface plate 6 composed of two upper and lower H-shaped cross-section members 5 and 5u cooperates with the base 2 to connect a plurality of L-shaped frames 3 together. It is fixed to. The girder material 5u above the vertical surface plate is provided so that the vertical position can be adjusted according to the height of the box girder to be assembled. As this adjusting structure, for example, a plurality of bolt holes 7 are provided in the vertical portion 4 of the L-shaped frame, and the girder material 5u above the vertical surface plate is fixed by the bolt holes corresponding to the height of the box girder. You can do it.

On the horizontal portion 9 of the L-shaped frame, a horizontal surface plate 11 made up of two elongated drawn shape steels 10 and 10 (the one shown is a rail) is placed. As shown in FIG. 1, the horizontal surface plate 11 is supported by a compression coil spring 13 interposed between the horizontal surface plate 9 of the L-shaped frame and a bracket 12 welded to the horizontal surface plate 9 so that the horizontal surface plate 11 is biased upward. When no load is applied to the surface plate 11, the horizontal surface plate 11 is levitated from the horizontal portion 9 of the L-shaped frame.

Rail girders 15, 15 parallel to the longitudinal direction of the base 2 are fixed to the tip of the horizontal portion 9 of the L-shaped frame 3 and the upper end of the vertical portion 4.

A carrier 16 is movably mounted on the rail girders 15, 15. The carriage 16 in the figure has a structure in which an inverted L-shaped column 17 is formed of H-shaped steel, and carriages 18, 18 extending in the extending direction of the rail girders 15, 15 are provided at both ends thereof. The carriages 18 and 18 are provided with support wheels 19 that roll on the respective rail girders 15 and 15, and guide wheels 20 that roll by abutting on both sides of the rail girder 15 so as to sandwich them. As shown in FIG. 2, a lifting prevention bracket 22 is provided around the upper side flange 21 of the rail girders 15, 15 so as to wrap around.

In the column 17 of the carrier table, two horizontal pushers 24 and 24 u that move forward and backward toward the vertical surface plate 6 and a vertical pusher 25 that moves vertically toward and away from the horizontal surface plate 11. And 25 are provided. The upper one 24 u of the two horizontal pushers is provided so that the mounting position in the upper and lower directions can be changed so that the position can be adjusted according to the height of the box girder to be temporarily assembled. .. The horizontal and vertical pushers 25, 26, 26u are formed by hydraulic cylinders, for example.

The lifting prevention bracket 22 described above is provided to prevent the carrier table 16 from being lifted by the pressing force when the vertical pusher 25 is operated.

The operation of the apparatus of the illustrated embodiment described above is said to have been described in the section of the above-mentioned operation, and will be omitted here.

[0021]

[Effect of the device]

 By using the jig of the present invention described above, the work of assembling the box girder of a crane can be performed with a small number of people and without much skill, and temporary welding can be performed in a shorter time. This has the effect of significantly improving the efficiency of assembly work.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment.

FIG. 2 is a partial front view of the embodiment.

FIG. 3 is a schematic front view of the main part of the embodiment.

FIG. 4 is a partially broken perspective view of a box girder.

[Explanation of symbols]

 3 L-shaped frame 4 Vertical part of L-shaped frame 6 Vertical surface plate 9 Horizontal part of L-shaped frame 11 Horizontal surface plate 13 Spring 16 Transfer table 24,24u Horizontal pusher

Claims (1)

[Scope of utility model registration request] 1. A horizontal fixed plate having a plurality of L-shaped frames (3) juxtaposed in the longitudinal direction of a work, the horizontal part (9) of the L-shaped frame (3) having the flexibility in the longitudinal direction. Board (11) is placed, L-shaped frame
Inside the vertical part (4) of (3), the vertical plate (6) is attached to each L-shaped frame (3).
The horizontal surface plate (11) is supported via a spring (13) that urges the platen upward, and a carrier table (16) that travels in the longitudinal direction is provided. , This carrier
A jig for assembling a box girder of a crane, characterized in that a horizontal pusher (24, 24u) that advances toward the vertical portion (4) of the L-shaped frame is attached to (16).