JPS6325045Y2 - - Google Patents

Description

[Detailed description of the invention] This invention forms a welding groove or splicing part to join the blocks when assembling the blocks of a structure by assembling divided blocks and then integrating them by welding or bolting. The present invention relates to an assembly jig for adjusting the relative position between members of both blocks.

Large structures are usually constructed as blocks that are divided into transportable dimensions, transported to the site, assembled into blocks, and then integrated by welding or bolting before they can function as a structure.

However, when assembling a large structure, the positions of the joining members of each block are more or less misaligned in the plate thickness direction and in the front, back, left and right directions along the surface (in the case of vertical joints, the top, bottom, left and right directions). Errors in the spacing were unavoidable, and during assembly, jigs such as strong bags and misaligned horses were used to make fine adjustments to the dimensions after assembly.

Fig. 1 shows an example of a conventional jig for adjusting the misalignment between members to be joined, in which a strong back 2 is attached to one member 1 by welding 4, and a strong back 2 is attached to the surface of the other member 1'. back 2
A metal arrow 3 is driven in between the two to correct the misalignment and form a predetermined groove 5. Part 1
The adjustment of the spacing between and 1' is separately carried out using a similar method.

These types of jigs require a lot of effort to install and remove after use, especially when the block weight is 20 to 30 tons or more. Assembling with an accuracy within plus or minus 2 to 5 mm required a great deal of labor and equipment.

Furthermore, since a large reaction force is applied to the welded attachment part of the strong bag due to the driving of a metal arrow, considerable reliability of welding is required when attaching jigs such as the strong bag. Especially in the case of important structures, when installing and welding these jigs,
Welding technology equivalent to or better than actual welding in a factory is required. Since this welding is performed by fillet welding by hand, a fairly large throat thickness is required to support the large reaction force mentioned above, welding takes a long time including preheating, and it takes a long time to remove the strong back. If it is cut close to the surface of the material, the cross-sectional area is large, so it will take time to cut, and if it is cut at a location where there is no weld metal, it will take time to smooth the material using a grinder.

In addition, undercuts that occur during welding when installing jigs are removed by smoothing the surrounding area with a grinder, etc. so that no undercuts remain after the jigs are removed, which reduces the thickness of the base material of the structural material and reduces the strength. There are cases where this is a problem.

In view of the above-mentioned problems of the conventional method of adjusting the relative positions of parts when assembling blocks of large structures, this invention has excellent welding reliability, extremely short time required for installation welding, and There is almost no undercut in the base metal when the bolt is removed, and the entire tip surface of the bolt is welded to the base metal, so there is less weld metal protruding into the corners around the weld, and when removed after construction is completed, there is no undercut on the base metal. The purpose of the present invention is to provide an assembly jig that can be used in conjunction with stud bolts made by stud welding that can be easily removed by gas cutting at extremely close positions, and that allows for easy misalignment and fine adjustment of gaps between members to be joined. shall be.

This invention will be explained based on a drawing showing an embodiment of the invention. As shown in FIG. It is constructed as a frame-shaped member integrally connected at 8. The key plate 7 on both sides has three notches 9,
10 and 11 are provided. The height of the diaphragm 8 is shorter than that of the key plate 7, so if the upper end positions of the diaphragms 8 and 8 are aligned and connected, a recessed portion 12 is formed between the inner surfaces of the key plates 7 on both sides and the lower edge of the diaphragm 8. Ru.

Stud bolts 13 are implanted in advance by stud welding at predetermined positions equidistant left and right from the center of the groove C formed when structural blocks A and B are assembled. Reference numeral 14 is a spacer for taking up the reaction force when installing the jig 6 by hooking and tightening the nut 15 on the stud bolt 13. This spacer 14 is provided on the key plates 7 on both sides, and A loose hole 16 is provided through which the bolt 13 passes. The spacer 14 may be a separate member separated from the frame member, but it may also be provided integrally fixed to the upper end surface of the key plate 7 of the frame member.
In that case, if the loose hole 16 is made into a long hole as shown in FIG. 2, it will be very easy to use.

The operation for adjusting the mutual positions of blocks to be joined using the above-mentioned jig will be explained below.

Now, as shown in Fig. 3, the blocks A and B are assembled in approximately the predetermined positions, and an appropriate interval (for example, 1 to 2
m), each pair of stud bolts 13 implanted by stud welding at a predetermined distance laterally from the groove are surrounded by the key plate 7 and diaphragm 8 on both sides of the assembly jig 6. After fitting the opening and fitting the loose hole 16 of the spacer 14 onto the stud bolt 13 to set it, tighten the nut 1.
Tighten 5. As a result, blocks A and B are assembled at substantially predetermined positions via a plurality of assembly jigs 6. Each assembly jig is responsible for adjusting the vertical misalignment of both blocks A and B, the gap in the direction perpendicular to the weld line, and the adjustment in the weld line direction, and by appropriately combining these, the mutual position of both blocks can be adjusted. Make adjustments.

As mentioned above, the groove C requires extremely high accuracy in mm units compared to the weight and scale of the structure.
This fine adjustment is achieved using the jig 6 and wedge of the present invention as follows.

Assembling jig 6 with stud bolt 13 and nut 15
By attaching it to blocks A and B with
Appropriate gaps are formed between each side of the stud bolt 13 and between the surfaces of the blocks A and B and the opposing surface of the notch 10, respectively. By driving a wedge into one of these gaps, the mutual position between blocks A and B can be adjusted in either the vertical, horizontal, or longitudinal direction. Therefore, by assigning adjustment in each direction to multiple jigs placed along the groove C, blocks A and B can be finely adjusted in any direction with an accuracy of millimeter units. can do.

To explain in more detail, FIGS. 4 and 5A,
As shown in B, a wedge 17,
19 allows adjustment in the direction perpendicular to the joining line as shown by the arrows in FIGS. 5A and 5B, respectively.
Also, as shown in FIGS. 6 and 7, the key plate 7
By driving wedges 20 and 21 between the inner side surface of the stud bolt 13 and the side surface of the stud bolt 13, adjustment in the direction parallel to the joining line can be made as shown by the arrow in FIG. Furthermore, as shown in FIGS. 8 and 9, by driving a wedge 18 between the surfaces of blocks A and B and the surface of the notch 10 facing them, the misalignment between blocks A and B can be eliminated. can be adjusted.
It is easier to use the notches 9, 11 and the recessed part 12 if the heights are set high so that no matter how the wedge is inserted, it will not contribute to adjustment in the height direction. Moreover, since the notch 10 is for adjustment in the height direction, it is desirable to design it so that it does not contribute to adjustment in the width direction. If each notch function is performed without affecting the functions of other notches in this way, any operator can quickly make fine adjustments.

By proceeding with the above steps, you can quickly
It becomes possible to assemble large blocks with the required accuracy reliably, safely, and at low cost.

After assembly, tack welding may be performed at the required position of the groove C, the nut 15 may be loosened and the jig 6 may be removed, or the welding may be continued as is and the jig 6 may be removed at the end. By widening the width of the notch 10 so that the wedge 18 does not extend over the range of the groove C, it is possible to weld the groove C by turning with the jig 6 set.

After assembly or welding is completed, the jig 6 is removed, the stud bolts 13 planted in the blocks A and B are removed by gas cutting, etc., and a glider is applied to make corrections, thereby completing the joining of the blocks. Since the stud bolt 13 is attached by stud welding, it can be cut very close to the surface of the base metal, and there is almost no undercut, so it takes less time to correct it with a glider etc. after removal. There is almost no reduction in the plate thickness of the members without hanging.

The jigs conventionally used for assembling blocks of large structures required great strength, which made disassembly work extremely difficult and had a negative impact on quality. Experiments have confirmed that the combination method yields as good results in disassembly as it does in assembling.

As described above, by using the assembly jig of the present invention, assembly work between large blocks of a large structure can be carried out efficiently and safely, and the strength problems caused by the reduction in the plate thickness of members can be solved. Remarkable effects can be obtained, such as the elimination of

[Brief explanation of drawings]

Figure 1 is a front view showing an example of a conventional assembly jig;
Fig. 2 is a perspective view showing an embodiment of the present invention, Fig. 3 is a plan view showing the arrangement of the jig when two blocks are joined using the jig of the present invention, and Fig. 4 is a perspective view showing an embodiment of the present invention. A perspective view illustrating a method for making adjustments in a direction parallel to the plane and perpendicular to the joining line, FIG. 5A,
B is a cross-sectional view taken along the - line in Fig. 4, which explains how to use the wedge when closing and opening the groove, respectively. Fig. 6 shows the adjustment in the direction parallel to the joining line of the blocks using this jig. FIG. 7 is a sectional view taken along the - line in FIG.
The figure is a sectional view taken along the - line in FIG. A, B...Block, C...Welding groove, 6...
Assembly jig, 7... Key plate, 8... Diaphragm, 9, 10, 11... Notch, 12... Recess, 13... Stud bolt, 14... Spacer, 17, 18, 19, 20, 21 ...wedge.

Claims (1)

[Scope of utility model registration request] After assembling divided blocks, when assembling blocks of a structure that are integrated by welding or bolting, the relative position between the two members that forms the weld groove or joint part that joins the blocks is adjusted. The jig has a pair of parallel key plates with a plurality of notches and a plurality of diaphragms connecting them, and these members are integrally connected to form a frame-shaped member, and in this case, the above-mentioned The end face of the key plate on the side having the notch protrudes beyond the end face of the diaphragm to form a recessed part surrounded by the inner surface of the key plate on both sides and the end face of the diaphragm, and an opening surrounded by the frame of the frame-shaped member. When both blocks of the structure to be joined are assembled in approximately the predetermined position, a pair of stud bolts pre-welded on both sides of the joint can be passed through, and the key plate has a notch. The stud bolt is passed through an opening surrounded by a frame of the frame member with one end face facing the face of the block, and is tightened with a nut through a spacer installed on the frame to block the frame member. between the notch of the key plate of the frame-shaped member and the recess formed by the inner surface of both key plates and the end face of the diaphragm, which faces the block surface, or with the side surface of the notch. A wedge is driven between the side surface of the stud bolt or between the inner surface of the key plate and the side surface of the stud bolt in a direction perpendicular to the surface between both blocks, parallel to the surface and perpendicular to the joining line, or joined. By adjusting the relative position in the direction parallel to the line and by combining an appropriate number of assembly jigs that adjust the relative position in any one of the above three directions, the relative position between the two blocks can be adjusted in the vertical, horizontal, and front-back directions. An assembly jig that allows you to do this.