JP2002206345A - Protective cover of adjustment jig for reinstallation of steel frame and adjustment jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective cover of an adjustment jig for reinstallation of a steel frame, and an adjustment jig for reinstallation of the steel frame capable of providing enhanced durability to the adjustment jig and ease of maintenance by preventing, using a simple arrangement, sputters from adhering to a jig body during the welding of the upper end of a lower steel column to the lower end of an upper steel column, for avoiding a decrease in the strength of the adjustment jig. SOLUTION: The protective cover 101 is attached to the jig 21 so as to intervene between a welded potion 100 and the jig 21, the welded portion 100 being located between the lower steel column 23 and the upper steel column 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective cover for a jig for refitting a steel frame used for joining an upper steel column to a lower steel column, and a steel frame provided with the protective cover. Refitting adjustment jig.

[0002]

2. Description of the Related Art Conventionally, when joining an upper steel column to a lower steel column at a construction site, first, the upper steel column is lifted by a crane and then placed above the lower steel column. After connecting the lower steel column and the upper steel column using a jig, the upper end of the lower steel column and the lower end of the upper steel column are joined by welding. I have to.

[0003] As an adjusting jig used for rebuilding such a steel frame, for example, those described in JP-A-11-303404 and JP-A-11-303406 are known. That is, as shown in FIGS. 18 to 20, for example, this jig 1 has a lower steel column 2 to which a lower erection piece 3 is attached at its upper end, and an upper erection piece 5 at its lower end. This is used to join the upper steel column 4 to which is attached, and has an annular substantially rectangular shape, and a slit portion 6 is formed at the center in the length direction. The jig 1 has an upper horizontal pressing bolt 7 for pressing the upper erection piece 5 in a horizontal direction on an upper portion thereof, and a lower side for pressing the lower erection piece 3 in a horizontal direction on a lower portion thereof. A lower fixing bolt 9 for fixing the horizontal pressing bolt 8 and the lower erection piece 3 and a jack device 10 are provided between the upper horizontal pressing bolt 7 and the lower horizontal pressing bolt 8. As shown in FIG. 20, the jack device 10 includes a screw member 11, a cam 12, a seat plate 13, and a support plate 15. The front plate 12 presses the seat plate 13 upward, thereby pressing the upper erection piece 5 upward and supporting it at an appropriate position.

[0004] In order to join the upper steel column 4 to the lower steel column 2 using such a jig 1, first, as shown in FIG.
Is inserted, and the slit 6
Of the upper erection piece 5 is stopped by a stopper 14 protrudingly attached to the upper end of the free end side of the upper erection piece 5, and then the upper steel column 4 is lifted by a crane, and the lower steel frame 4 is lifted. After the upper erection piece 5 and the lower erection piece 3 are arranged above the column 2 so as to face each other, the jig 1 is swung like a pendulum, and the lower erection piece 3 is slit into the slit portion of the jig 1. 6
Insert Thereafter, in the state shown in FIG. 19, the upper horizontal pressing bolt 7 is tightened to connect and fix the jig 1 and the upper erection piece 5, and then each lower horizontal pressing bolt 8 is tightened, whereby the upper steel column 4 is tightened.
Is moved in the horizontal direction with respect to the lower steel column 2 to correct its horizontal position, and the jack device 1
0 corrects the vertical posture of the upper steel column 4 by pressing and supporting the upper erection piece 5 at an appropriate position. Thus, the upper steel column 4 is connected to the lower steel column 2 in a favorable posture. After that, the lifting tool of the crane is removed from the upper steel column 4 and the upper end of the lower steel column 2 and the lower end of the upper steel column 4 are welded to each other, so that the lower steel column 2 and the upper column are welded. With the steel column 4 of the above.

[0005]

However, as described above,
If the upper steel column and the lower steel column are held in position by a jig and the upper end of the lower steel column and the lower end of the upper steel column are joined by welding, The scattered spatter adheres to the jig, and the jig turns black or has holes or is partially annealed, so that the strength of the jig body may not be guaranteed. . Therefore, it is difficult to improve the durability of such a jig, it takes time for maintenance, and it is difficult to judge whether or not it can be reused, and it is difficult to use the jig with stable quality. Having.

The present invention has been made in view of such a problem, and an object thereof is to weld a lower end of a lower steel column and a lower end of an upper steel column with a simple configuration. Prevents the spatter that is scattered when joining by the jig from adhering to the jig body and avoids a decrease in the strength of the steel frame refitting adjustment jig, thereby improving the durability of the steel frame refitting adjustment jig And a protective cover for the steel frame re-installation adjustment jig, which can facilitate maintenance and can use the steel frame re-installation adjustment jig with stable quality, and a steel frame having the protective cover. An object of the present invention is to provide a re-installation adjustment jig.

[0007]

In order to achieve the above object, an invention according to claim 1 is a jig for adjusting a steel frame re-installation used for joining an upper steel column to a lower steel column. In order to protect the steel column, the steel column re-installation adjustment provided so as to be interposed between the welded portion between the lower steel column and the upper steel column and the steel frame re-installation adjustment jig. It features a protective cover for the jig.

[0008] According to such a configuration, when the upper steel column is joined to the lower steel column, a welding portion between the lower steel column and the upper steel column, and a steel frame re-installation adjustment jig. Since the protective cover is interposed between the jig and the jig, it is possible to effectively prevent spatter scattered at the time of welding from being attached to the steel-frame refitting adjustment jig. Therefore, it is possible to avoid a reduction in the strength of the steel frame re-installation adjustment jig, thereby improving the durability of the steel frame re-installation adjustment jig and facilitating maintenance, and improving the steel frame re-installation adjustment. The jig can be used with stable quality.

The invention described in claim 2 is the first invention.
In the invention described in the above, the steel frame refitting adjustment jig,
Used to join the upper steel column to which the erection piece is attached to the lower steel column to which the erection piece is attached, and can be attached to the jig body and the erection piece of the lower steel column. A first attachment portion, and a second attachment portion attachable to the erection piece of the upper steel column, wherein the protective cover is disposed at least between the first attachment portion and the second attachment portion. And is attached to the jig body.

According to such a configuration, if the first attachment portion is attached to the erection piece of the lower steel column and the second attachment portion is attached to the erection piece of the upper steel column, the steel frame re-installation adjustment repair can be performed. With the tool, the lower steel column and the upper steel column can be reliably connected and welded. Moreover, at the time of welding, the protective cover
Since it is arranged at least between the first mounting portion and the second mounting portion, it is possible to reliably prevent spatters scattered at the time of welding from attaching to the jig main body. For this reason, a reduction in the strength of the steel frame re-installation adjustment jig can be more reliably avoided.

The invention described in claim 3 is the same as the claim 2
In the invention described in the above, the protective cover is provided with a protective wall portion facing a welded portion between the erection piece of the lower steel column and the erection piece of the upper steel column, and an attachment attached to the jig body. And a part.

According to such a configuration, spatters scattered during welding can be reliably protected by the protective wall portion, and the protective cover can be securely mounted to the jig body by the mounting portion. Therefore, it is possible to more reliably avoid a decrease in the strength of the steel frame re-installation adjustment jig.

The invention described in claim 4 is the same as the claim 3.
In the invention described in the above, the protective wall portion, a lower notch portion for inserting the erection piece of the lower steel column, and an upper notch portion for inserting the erection piece of the upper steel column. Is formed.

According to such a configuration, in a state where the erection piece of the lower steel column and the erection piece of the upper steel column are connected by the steel frame re-installation adjustment jig, the lower notch of the protection wall is provided. Then, the erection piece of the lower steel column is inserted, and the erection piece of the upper steel column is inserted into the upper cutout of the protective wall. Therefore, the protective wall portion can cover the jig body below the erection piece of the lower steel column and can also cover the jig body above the erection piece of the upper steel column, so that the steel frame can be wider. It is possible to more effectively prevent the spatter scattered at the time of welding from adhering to the jig main body by covering the refitting adjustment jig. For this reason, a reduction in the strength of the steel frame re-installation adjustment jig can be further avoided.

Also, an erection piece of the lower steel column is inserted into the lower notch of the protection wall, and an erection piece of the upper steel column is inserted into the upper notch of the protection wall. Then, the rattling of the protective cover is regulated by the erection piece of the lower steel column and the erection piece of the upper steel column,
In a state where it is securely positioned, spatters scattered during welding can be reliably protected.

The invention described in claim 5 is the same as the claim 2.
In the invention described in any one of (4) to (4), the protective cover is detachably attached to the jig body.

According to such a configuration, the protective cover is
Since the protective cover is detachably attached to the jig main body, even if the protective cover is damaged due to the attachment of spatter scattered during welding, it can be used again satisfactorily only by replacing the protective cover. Therefore, the steel frame re-installation adjustment jig can be favorably used for a long time with simple maintenance at low cost.

According to a sixth aspect of the present invention, there is provided a steel frame re-installation adjusting jig, comprising a protective cover for the steel frame re-installation adjusting jig according to any one of the first to fifth aspects. It is characterized by:

According to this configuration, the protective cover effectively prevents spatters scattered at the time of welding from adhering to the steel-frame rebuilding adjustment jig. Thus, the durability of the steel frame refitting adjustment jig can be improved and maintenance can be facilitated, so that the steel frame refitting adjusting jig can be used with stable quality.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing a jig as one embodiment of a steel frame re-installation adjusting jig according to the present invention, and FIG.
3 is a front view thereof, FIG. 3 is a rear view thereof, FIG. 4 is a left side view thereof, FIG. 5 is a right side view thereof, and FIG. 6 is a sectional view taken along line AA in FIG. First, an embodiment of a jig to which the protective cover of the present invention is attached will be described in detail with reference to FIGS.

1 to 6, the jig 21
Has two first base plates 29 and second base plates 30 made of metal and facing each other. These first base plate 29 and second base plate 3
A central portion of the first base plate 29 extends vertically, and a reinforcing plate 85 made of metal is provided between the first base plate 29 and the second base plate 30. The first base plate 29 and the second base plate are welded or integrally formed. 30 are attached to each.

The lower end portions 31 and 32, which bulge in a substantially rectangular shape toward the side, are provided at the lower end portions of the first base plate 29 and the second base plate 30 which are continuous from the center. Lower swelling portions 33 and 34 swelling downward in a substantially semicircular shape are formed, and the free ends of the lower swelling portions 31 and 32 facing each other have metal lower portions. A side support plate 39 is erected and attached to the free ends of each of the lower bulges 31 and 32 by welding or as one piece.

The upper end portions of the first base plate 29 and the second base plate 30 which are continuous from the central portion are expanded in a substantially rectangular shape toward the same side as the lower swelling portions 31 and 32. Projecting upper bulging portions 35 and 3
6 and upper bulging portions 37 and 38 bulging upward in a substantially tapered shape. At the free ends of the upper bulges 35 and 36 facing each other, a metal upper support plate 40 is erected, and is welded or integrally formed with the free ends of the upper bulges 35 and 36. Installed. At the free ends of the upper bulges 37 and 38 facing each other, a metal upper surface support plate 45 is provided, and the upper bulges 37 are welded or integrally formed.
And 38 are attached to the free ends of the free ends.

In the jig 21, the center of the first base plate 29 and the second base plate 30 is a jig body 22, and the lower end thereof is attached to the lower erection piece 24 of the lower steel column 23. Possible first mounting part 2
7, and a second mounting portion 28 whose upper end is mountable on the upper erection piece 26 of the upper steel column 25.
It has been.

As shown in FIG. 3, the second mounting portion 28
Between the first base plate 29 and the second base plate 30 is formed wider than the space between the first base plate 29 and the second base plate 30 in the first mounting portion 27. As a result, as described later,
The first mounting portion 27 is securely mounted to the lower erection piece 24, and the position adjustment of the first pressing bolts 57 and 58 to the upper erection piece 26 by horizontal pressing is facilitated.

The first base plate 29 and the second base plate 29
The base plate 30 is provided with each of the lower bulges 31 and 3
2, each lower bulge 33 and 34, each upper bulge 35
Each of the end portions of the and 36 is formed as a curved shape having no corners, and the rigidity thereof is increased while avoiding the possibility of breakage due to stress concentration.

In the first mounting portion 27, as shown in FIG. 3, screw holes 42 and 43 for screwing the lower fixing bolt 41 are formed in the lower bulging portions 33 and 34, respectively. , On one of the lower bulging portions 31,
Screw hole 46 for screwing the lower first pressing bolt 44
Are formed. A screw hole for screwing the lower second pressing bolt 48 also at the upper end side of the one lower bulging portion 31 and near the boundary between the first mounting portion 27 and the jig main body 22. 50 are formed. Further, the lower support plate 39
Is formed with a screw hole 53 into which the lower third pressing bolt 52 is screwed.

The lower fixing bolt 41 is screwed from the screw holes 42 and 43 of one of the lower bulges 33 and 34 to the screw holes 42 and 43 of the other lower bulges 33 and 34. It is possible to wear. Further, the lower first pressing bolt 44 can be screwed into the screw hole 46 of the one lower bulging portion 31, and the screw on the upper end side of the one lower bulging portion 31 is screwed. The lower second pressing bolt 48 can also be screwed into the hole 50. Further, the lower third pressing bolt 52 can be screwed into the screw hole 53 of the lower supporting plate 39 from a direction orthogonal to the lower first pressing bolt 44 and the lower second pressing bolt 48. .

In the second mounting portion 28, upper fixing bolts 54 are provided at the base ends of the upper bulging portions 37 and 38, respectively.
Screw holes 55 and 56 are formed respectively for screwing the upper side bulging portions 35 and 36, and two upper first pressing bolts 57 and 58 are screwed into the base ends of the upper bulging portions 35 and 36, respectively. Screw holes 59 and 60 are formed respectively. The upper support plate 40 has a screw hole 62 for screwing the upper second pressing bolt 61. Further, the upper surface support plate 45 also has an upper third
A screw hole 87 for screwing the pressing bolt 86 is formed.

An upper fixing bolt 54 is screwed from the screw holes 55 and 56 of one of the upper bulging portions 37 and 38 to the screw holes 55 and 56 of the other upper bulging portions 37 and 38. It is possible. Further, two upper first pressing bolts 57 and 58 can be screwed into the screw holes 59 and 60 of each of the upper bulging portions 35 and 36 from opposite directions, respectively. The upper second pressing bolt 61
Can be screwed from a direction orthogonal to the upper first pressing bolts 57 and 58. Further, the upper third pressing bolt 86 is also screwed into the screw hole 87 of the upper surface support plate 45.
The screw can be screwed from a direction perpendicular to the pressing bolt 61.

The jig 21 has a first mounting portion 27.
Between the upper erection piece 2 and the second mounting portion 28.
Jack device 66 capable of pressing the lower end portion 6 upward.
Is provided.

As shown in FIG. 6, the jack device 66 includes a main body 67, a plunger member 68, and a piston member 6.
9, a receiving member 70, a spring 71, and the like.

The main body 67 is disposed above the lower bulging portions 31 and 32 facing each other, and is attached via a substantially U-shaped holder member 72. That is, bolt insertion holes are formed at both ends of the holder member 72, and screw holes are formed in the jig body 22 of the first base plate 29 and the second base plate 30, respectively. Is held around the main body 67, each fixing bolt 96 is inserted into the jig main body 2 through each bolt insertion hole formed at both ends of the holder member 72.
The jack device 66 is screwed into the second screw hole.
Is attached to the jig 21.

The main body 67 has a substantially L-shaped cylindrical shape, and has a piston cylindrical portion 73 in which the piston member 69 is accommodated.
And a plunger cylinder 74 extending laterally from the piston cylinder 73 and accommodating the plunger member 68 are integrally formed, and the inside of the piston cylinder 73 and the plunger cylinder 7 are formed.
The inside of 4 is communicated with a communication passage 95.

The plunger member 68 includes a plunger shaft 89 having a thread formed in the axial direction, a bolt 90 provided at one end of the plunger shaft 89, and a plunger 91 provided at the other end. While being inserted into the plunger cylinder 74 in a sealed state, the plunger shaft 89 is screwed to a seal nut 88 provided at the free end of the plunger cylinder 74 so as to be able to advance and retreat. .

The piston member 69 has a large-diameter portion 92 and a small-diameter shaft portion 93 integrally formed. The large-diameter portion 92 is sealed, and the spring 7 surrounds the small-diameter shaft portion 93.
1 is accommodated in the piston cylinder 73, and in this state, an upper lid 94 is attached to the upper end of the piston cylinder 73 so that the small-diameter shaft 93 can be inserted and retracted. At the upper end of the small-diameter shaft portion 93, a receiving member 70 formed in a disk shape and having a substantially U-shaped cross section is attached.
6 are arranged to receive the lower end thereof.

Then, oil is filled in the plunger cylinder 74 and the communication passage 95, and the bolt 90 is rotated in the screwing direction of the plunger shaft 89 by the wrench 78 as shown in FIG. As a result, the piston member 69 rises, and the receiving member 70 moves upward. On the other hand, if the bolt 90 is rotated in the retreating direction of the plunger shaft 89 by the wrench 78, the piston 74 is biased by the urging force of the spring 74. The member 69 descends, and the receiving member 70 is moved downward. Therefore, in this jack device 66, the bolt 90
By rotating the upper erection piece 26 in the forward and reverse directions with the wrench 78, the upper erection piece 26 can be lifted or lowered, thereby supporting the upper erection piece 26 at an appropriate position.

In the present embodiment, a protective cover 101 is provided to protect such a jig 21 from spatter scattered when welding the lower steel column 23 and the upper steel column 25. I have.

FIG. 7 is a perspective view of the protective cover, FIG. 8 is its front view, FIG. 9 is its right side view, and FIG. 10 is its plan view. Next, FIGS. 7 to 10 and FIGS.
The protective cover 101 will be described with reference to FIGS.

7 to 10, the protective cover 101 is made of a metal plate having a U-shaped cross section, and has a substantially rectangular protective wall 102 and a protective wall 102.
And a mounting plate portion 103 as a mounting portion bent from both ends in the width direction. As shown in FIG. 15, the protective wall portion 102 has a lower notch 104 at the lower end thereof for inserting the erection piece 24 of the lower steel column 23.
Is formed in a substantially rectangular shape toward the lower side, and a lower notch portion 105 for inserting the erection piece 26 of the upper steel column 25 at the upper end thereof has a rectangular shape toward the upper side. An opening is formed.

Further, the mounting plate portion 103 is
From the both ends in the width direction of the protective wall portion 102,
It is formed in a substantially triangular shape in a side view so as to extend in a direction substantially orthogonal to each other and taper from its base end toward the free end.
2, a mounting hole 106 is provided.

Then, the protective cover 101 is provided as shown in FIG.
As shown in FIG. 5, the protection wall portion 102 faces the welded portion 100 between the erection piece 24 of the lower steel column 23 and the erection piece 26 of the upper steel column 25, and The jig main body 22 is arranged so as to surround the jig main body 22 by the two mounting plate portions 103, and the mounting plate portion 10
The third mounting hole 106 faces the screw hole of the jig main body 22, and is detachably mounted to the jig main body 22 by inserting and fixing the fixing bolts 96 together with the holder member 72.

FIG. 11 is a front view showing a state in which the jig is connected to the upper erection piece. FIG. 12 is a side view showing a state in which the jig is connected to the upper erection piece.
Is a front view showing a state in which the jig is connected to the upper erection piece and the lower erection piece, FIG.
FIG. 15 is a perspective view of a main part showing a use state of the jack device.
It is a principal part perspective view which shows the state which welds an upper steel column and a lower steel column.

Next, referring to FIGS. 11 to 15, the jig 21 to which the protective cover 101 is attached is used to mount the upper steel column 25 on the lower steel column 23. The joining method will be described. Lower steel column 2
Reference numeral 3 denotes a steel column having a lower end portion already joined to another steel column, for example, as shown in FIG. 13 to FIG. In the part and the lower end, at the center of each side of the outer peripheral surface,
The four substantially rectangular plate-shaped lower erection pieces 24 are respectively welded and fixed in the direction perpendicular to the circumferential direction of the lower steel column 23. Also, as shown in FIG. 12, at the center of each lower erection piece 24,
Insertion holes 83 used to insert a hanging tool (not shown) of the crane are formed so as to penetrate in the thickness direction.

The upper steel column 25 is a steel column whose lower end is to be joined to the upper end of the lower steel column 23. For example, as shown in FIGS. Its cross-sectional shape is substantially quadrangular, and at its upper and lower ends, 4
Two substantially rectangular plate-shaped upper erection pieces 26 are arranged in a direction orthogonal to the circumferential direction of the upper steel column 25.
Each is fixed by welding. In addition, as shown in FIG. 11, an insertion hole 84 used to insert a hanging tool (not shown) of the crane is formed in the center of each upper erection piece 24 so as to penetrate in the thickness direction. , Respectively.

In this method, first, the four jigs 21 are respectively connected to the four upper erection pieces 26 provided at the lower end of the upper steel column 25. Each jig 21 is connected to each upper erection piece 26
First, as shown in FIGS. 11 and 12, each of the upper bulging portions 3 in the second mounting portion 28 of the jig 21 is connected.
After inserting and sandwiching the upper erection piece 26 between 7 and 38, the insertion hole 84 of the upper erection piece 26 is aligned with the screw holes 55 and 56 of the upper bulging portions 37 and 38, respectively. The upper fixing bolt 54 is
One of the screw holes 55 and 56 of each of the upper bulging portions 37 and 38 is inserted into the screw holes 55 and 56 of the other upper bulging portions 37 and 38 through the insertion hole 84 of the upper erection piece 26. Then, the screw portion of the upper fixing bolt 54 is screwed into the screw holes 55 and 56 of the other upper bulging portions 37 and 38. Thereby, the jig 21 is securely connected to the upper erection piece 26.

Thereafter, the upper first pressing bolts 57 and 58 are screwed into the screw holes 59 and 60 of the upper bulging portions 35 and 36, and the front and back surfaces of the upper erection piece 26 are appropriately adjusted. While pressing in the thickness direction of the upper erection piece 26, the upper second pressing bolt 61 is screwed into the screw hole 62 of the upper support plate 40,
By appropriately pressing the side surface of the upper erection piece 26 from the free end side end of the upper erection piece 26 toward the base side end, the upper steel column 25
Of the connecting position of the jig 21 with respect to. More specifically, the connection posture of the jig 21 so that the upper erection piece 24 is smoothly inserted between the lower bulging portions 33 and 34 of the jig 21 in a state of being lifted by the crane. To adjust. Then, this jig 21
When connecting to the lower steel column 23, each of the lower bulges 33
Since the upper erection piece 24 can be smoothly received in a good posture between the position and the position 34, efficient work can be performed.

Then, in this way, the upper steel column 2
After the connection posture of the jig 21 with respect to 5 is adjusted, the upper steel column 25 is lifted by a crane, and the upper erection pieces 26 and the lower erection pieces 24 are moved above the lower steel column 23. They are arranged so as to face each other. The lifting of the upper steel column 25 by a crane can be performed by a known method. For example, a lifting tool is inserted into the insertion hole 84 of each upper erection piece 26 provided at the upper end of the upper steel column 25. Just lift it.

Then, the four jigs 21 are connected to the four lower erection pieces 24 provided at the upper end of the lower steel column 23, respectively. Each jig 21
In order to connect the upper steel column 25 to the lower erection pieces 24, first, as shown in FIG. 11 and FIG. The lower erection piece 24 is inserted and sandwiched between the projections 33 and 34.

Next, as shown in FIGS. 13 and 14, the insertion hole 83 of the lower erection piece 24 and the screw holes 42 and 43 of each of the lower bulging portions 33 and 34 are aligned, and the lower fixing portion is fixed. The bolt 41 is attached to each of the lower bulging portions 3.
3 and 34, through one of the screw holes 42 and 43 of the lower erection piece 24, into the screw holes 42 and 43 of the other lower bulges 33 and 34, and through the other. Downward bulges 33 and 3
4 and the lower fixing bolt 41
Is screwed. Thereby, this jig 2
1 is securely connected to the lower erection piece 24.

Next, the posture of the upper steel column 25 with respect to the lower steel column 23 is corrected in the horizontal direction, and the joints of the two are performed. The horizontal correction of the upper steel column 25 can be performed, for example, as follows. That is, as shown in FIG. 13, first, the lower first pressing bolt 44 is inserted into the screw hole 46 of one of the lower bulging portions 31.
, And presses the lower erection piece 24 toward the other lower bulging portion 32, and also inserts the lower second erection piece 24 into the screw hole 50 on the upper end side of the lower bulging portion 31. By screwing the pressing bolt 48, the lower erection piece 24 is
The lower erected piece 24 is pressed against the other lower bulging portion 32, and further, the lower third pressing bolt 52 is screwed into the screw hole 53 of the lower support plate 39, so that the side surface of the lower erection piece 24 is The first mounting portion 27 is firmly fixed to the lower erection piece 24 by pressing the lower erection piece 24 from the free end side end to the base side end.

Then, the upper first pressing bolts 57 and 58 are appropriately adjusted and tightened, and the upper erection piece 26 is pressed in the thickness direction thereof, whereby the upper erection piece 26 is pressed against the lower steel column 23 on the lower side. The position adjustment in the circumferential direction in the horizontal direction is performed. That is, when the upper and lower surfaces of the upper erection piece 26 are pressed by the upper first pressing bolts 57 and 58, the upper steel column 25
Is moved in the direction in which the pressing force acts, so that the upper first pressing bolts 57 and 58 opposing each other are appropriately adjusted and tightened, whereby the upper steel column 25 is moved.
Can be moved in the forward and reverse directions in the circumferential direction, whereby the circumferential position adjustment in the horizontal direction can be performed.

In addition to such adjustment of the circumferential position in the horizontal direction, the upper second pressing bolt 61 is appropriately adjusted and tightened so that the side surface of the upper erection piece 26 is moved to the free end side of the upper erection piece 26. By pressing from the side end to the side end on the base side, the position adjustment in the direction orthogonal to the horizontal circumferential direction with respect to the lower steel column 23 on the upper steel column 25 is performed. That is, if the upper second pressing bolt 61 is pressed from the free end side end of the upper erection piece 26 toward the base side end, the upper steel column 25 moves in the direction in which the pressing force acts. Since it is moved, the upper second pressing bolt 61
By appropriately adjusting and tightening, the upper steel column 25 can be moved in a direction perpendicular to the circumferential direction thereof, whereby the position can be adjusted in the horizontal direction perpendicular to the circumferential direction. .

When the horizontal correction of the upper steel column 25 is performed in this manner, the upper steel column 25 is attached to the lower steel column 23 in the circumferential direction in the horizontal direction and in the vertical direction. Therefore, the upper steel column 25 can be joined to the lower steel column 23 in a favorable posture.

Next, the posture of the upper steel column 25 with respect to the lower steel column 23 is corrected in the vertical direction. In the vertical direction of the upper steel column 25, as described above, the bolt 90 of the jack device 66 in FIG.
Can be lifted or lowered by rotating the upper erection piece 26 in the forward and reverse directions with a wrench 78, thereby supporting the upper erection piece 26 at an appropriate position. In this way, if the upper erection piece 26 is supported at an appropriate position, the inclination of the upper steel column 25 in the vertical direction with respect to the lower steel column 23 can be corrected. The posture of the column 25 in the vertical direction can be reliably corrected, and the upper steel column 25 can be joined to the lower steel column 23 in a more favorable posture.

Further, in addition to such horizontal and vertical position adjustments, the upper third pressing bolt 86 is appropriately adjusted and tightened so that the upper end of the upper erection piece 26 is directed from the upper end to the lower end. When pressed, the upper steel column 25 can be pressed against the lower steel column 23. Therefore, the upper steel column 25 can be closely contacted and connected to the lower steel column 23, and the upper steel column 25 can be joined to the lower steel column 23 in a favorable posture.

In the above description, after adjusting the position of the upper erection piece 26 in the horizontal direction,
The position of the upper erection piece 26 in the vertical direction is adjusted, but the order may be any order. After the position of the upper erection piece 26 is adjusted in the vertical direction, the position of the upper erection piece 26 in the horizontal direction is adjusted. The adjustment may be performed, and the horizontal position adjustment and the vertical position adjustment may be performed in parallel.

Then, in this manner, the lower steel column 2
After the posture of the upper steel column 25 with respect to 3 is corrected, the upper end of the lower steel column 23 and the lower end of the upper steel column 25 are joined by welding. In this method, if the upper steel frame note 25 and the lower steel frame column 23 are connected by each jig 21, then, at an appropriate point in time, the crane hanging tool is connected to the upper steel frame column. What is necessary is just to remove from each upper erection piece 26 provided in the upper end part of 25.

At the time of this joining, spatters during welding are scattered as shown in FIG. 15, but a welding portion 100 between the lower steel column 23 and the upper steel column 25 is formed.
Since the protective wall portion 102 of the protective cover 101 is interposed between the jig 21 and the jig 21, such spatter is effectively prevented from adhering to the jig 21. Therefore, it is possible to avoid a decrease in the strength of the jig 21, thereby improving the durability of the jig 21 and facilitating maintenance, and using the jig 21 with stable quality. . More specifically, since the protective wall portion 102 of the protective cover 101 is disposed between the first mounting portion 27 and the second mounting portion 28, spatters scattered at the time of welding are generated on the jig main body 22. Adhesion is reliably prevented.

Further, since such a protective cover 101 includes a protective wall portion 102 facing the welded portion 100 and a mounting plate portion 103 attached to the jig main body 22,
Spatter scattered during welding can be reliably protected by the protective wall portion 102, and the mounting plate portion 103
Accordingly, the protective cover 101 can be securely attached to the jig main body 22. Therefore, the jig 21 can be more reliably.
Can be avoided.

In addition, a lower cutout portion 104 for inserting the erection piece 24 of the lower steel column 23 and an upper cutout for inserting the erection piece 26 of the upper steel column 25 are formed in the protective wall portion 102. Since the protective wall portion 102 is formed, the jig body 22 below the erection piece 24 of the lower steel column 23 can be covered by the protective wall portion 102 and the erection piece of the upper steel column 25 can be covered. 26 can be covered. For this reason, the jig body 22 and the first and second attachment portions 27 and 28 are more widely covered, and spatter scattered during welding is more effectively prevented from adhering to the jig body 22. be able to. In addition, the protective wall 1
02, the erection piece 24 of the lower steel column 23 is inserted into the lower notch 104, and the protection wall 10
In a state where the erection piece 26 of the upper steel column 25 is inserted into the upper notch portion 105, the erection piece 24 of the lower steel column 23 and the upper steel column 25
Of the protective cover 10 by the erection piece 26 of FIG.
Since rattling or the like is regulated, the jig main body 22 can be reliably protected from spatter scattered at the time of welding in a state where it is securely positioned.

The protective cover 101 is removably attached to the jig body 22 by inserting the fixing bolts 96 into the mounting holes 106 of the mounting plate portions 103. Even if the protective cover 101 is damaged due to the adhesion, if the protective cover 101 alone is replaced, it can be used again satisfactorily.
Therefore, the jig 21 can be favorably used for a long period of time with simple maintenance and at low cost.

In the above description, the lower steel column 23 and the upper steel column 25 have a sectional shape of approximately 4 mm.
Each jig 21 is connected to each of the lower erection pieces 24 and the upper erection pieces 26 formed at the center of each side of the outer peripheral surface of each of the jigs 21. The shape of the column 23 and the upper steel column 25 is not limited at all, and may be, for example, a polygonal cross section, a circular cross section, or the like, and the number of each lower erection piece 24 and each upper erection piece 26 The jigs 21 are not limited to each other, and each jig 21 is
It is not necessary to always connect to correspond to.

The protective cover of the present invention is not limited to the above-described jig 21 but may be any other steel-frame re-adjustment jig.
It can be widely applied without any limitation.
For example, the above-described jig 1 shown in FIGS. 18 to 20 can also be applied. That is, the cover 101 applied to the jig 1 is formed of, for example, a metal plate having a U-shaped cross section, as shown in FIG. An attachment plate portion 103 is provided as an attachment portion bent from both ends in the width direction, and the protective wall portion 102 has a lower end for inserting the erection piece 3 of the lower steel column 2 into a lower end thereof. A notch 104 is formed in a substantially rectangular opening toward the lower side, and a lower notch 105 for inserting the erection piece 5 of the upper steel column 4 into the upper end thereof.
Are formed in a rectangular shape toward the upper side.

Further, the mounting plate portion 103 is
From the both ends in the width direction of the protective wall portion 102,
It extends in a substantially orthogonal direction so as to face each other, and is formed in a substantially trapezoidal shape when viewed from the side. A mounting hole 106 for mounting to the jig main body 22 is drilled at the lower end of the tip.

In this protective cover 101, as shown in FIG. 16, for example, the protective wall portion 102 is provided between the erection piece 3 of the lower steel column 2 and the erection piece 5 of the upper steel column 4. The jig 1 is arranged so as to surround the jig 1 by the protective wall portion 102 and the two attachment plate portions 103 in a state where the jig 1 is opposed to the welding portion. 8 is detachably attached to the jig 1 by inserting and fixing a lower horizontal pressing bolt 8 so as to face the screw hole 8.

[0067]

As described above, according to the first aspect of the present invention, it is possible to improve the durability of the steel frame re-installation adjustment jig and to facilitate maintenance, and to adjust the steel frame re-installation adjustment. The jig can be used with stable quality.

According to the second aspect of the present invention, it is possible to reliably prevent spatter scattered at the time of welding from adhering to the jig main body. It can be avoided reliably.

According to the third aspect of the invention, the spatter scattered during welding can be reliably protected by the protective wall portion, and the protective cover can be securely mounted to the jig body by the mounting portion. In addition, it is possible to more reliably avoid a reduction in the strength of the steel frame re-installation adjustment jig.

According to the fourth aspect of the invention, it is possible to more effectively prevent the spatter scattered at the time of welding from adhering to the jig body by covering the steel frame re-installation adjusting jig more widely. Can reduce the strength of the steel frame refitting adjustment jig.
It can be further avoided. In addition, the erection piece of the lower steel column and the erection piece of the upper steel column regulate the backlash of the protective cover, etc. Can be protected.

According to the fifth aspect of the present invention, the steel frame refitting adjustment jig can be favorably used for a long period of time at a low cost with a simple maintenance.

According to the sixth aspect of the present invention, it is possible to improve the durability of the steel frame re-installation adjusting jig and to facilitate maintenance, and to use the steel frame re-installing adjusting jig with stable quality. can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a jig as one embodiment of a steel frame re-installation adjustment jig of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a left side view of FIG.

FIG. 5 is a right side view of FIG. 1;

FIG. 6 is a sectional view taken along line AA in FIG. 2;

FIG. 7 is a perspective view of a protective cover.

FIG. 8 is a front view of the protective cover.

FIG. 9 is a right side view of the protective cover.

FIG. 10 is a plan view of a protective cover.

FIG. 11 is a front view showing a state where a jig is connected to an upper erection piece.

FIG. 12 is a side view showing a state where the jig is connected to the upper erection piece.

FIG. 13 is a front view showing a state where a jig is connected to an upper erection piece and a lower erection piece.

FIG. 14 is a perspective view of a main part showing a use state of the jack device.

FIG. 15 is a perspective view of relevant parts showing a state where an upper steel column and a lower steel column are welded.

FIG. 16 is a front view showing a state in which a jig according to a different embodiment is connected to an upper erection piece and a lower erection piece.

FIG. 17 is a perspective view of a protective cover of the jig shown in FIG.

FIG. 18 is a front view showing a use state of a conventional jig.

FIG. 19 is a front view showing a use state of a conventional jig.

FIG. 20 is a perspective view of a main part showing a use state of a conventional jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Jig 22 Jig main body 23 Lower steel column 24 Lower erection piece 25 Upper steel column 26 Upper erection piece 27 1st mounting part 28 2nd mounting part 100 Welding part 101 Protective cover 102 Protective wall part 103 Mounting plate Part 104 Lower notch 105 Upper notch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takaaki Shibamoto, 2-180 Iwamuro, Izamuro, Osaka Sayama, Osaka Prefecture Inside of Inchi Chain Block Co., Ltd. (72) Shuji Ota 2-180 Iwamuro, Iwamuro, Osaka, Osaka In-Chain Block Co., Ltd. (72) Inventor Masato Fujisawa 3-5-2, Kusakiha Misaki, Hirakata-shi, Osaka F-term (reference) 2E125 AA02 AC14 CA90 EA33 EB12 2E174 AA01 BA03 DA08 DA12 DA38

Claims (6)

[Claims] 1. A method according to claim 1, wherein the lower steel column is connected to the upper steel column in order to protect a steel rebuilding adjustment jig used to join the upper steel column to the lower steel column. A protective cover for a steel-frame refitting adjustment jig, which is provided so as to be interposed between a welded portion of the steel frame and the steel-frame refitting adjustment jig. 2. The jig for adjusting the re-establishment of a steel frame is used for joining an upper steel column to which an erection piece is attached to a lower steel column to which an erection piece is attached. A main body, a first attachment portion attachable to the erection piece of the lower steel column, and a second attachment portion attachable to the erection piece of the upper steel column, wherein the protective cover is at least The protective cover for a steel-frame refitting adjusting jig according to claim 1, wherein the protective jig is arranged between the first mounting portion and the second mounting portion, and is mounted on the jig main body. 3. The protective cover includes a protective wall portion facing a welded portion between the erection piece of the lower steel column and the erection piece of the upper steel column, and an attachment attached to the jig body. The protective cover of the steel frame re-installation adjustment jig according to claim 2, comprising a portion. 4. A lower cutout for inserting the erection piece of the lower steel column and an upper cutout for inserting the erection piece of the upper steel column in the protective wall portion. The protective cover for a steel frame re-installation adjusting jig according to claim 3, wherein the protective cover is formed. 5. The protective cover according to claim 2, wherein the protective cover is detachably attached to the jig body. 6. A steel frame re-installation adjusting jig, comprising a protective cover for the steel frame re-installing adjusting jig according to any one of claims 1 to 5.