JP2841033B2 - Hook for erection of fire block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for mounting a reinforcing fire block for supporting an earth retaining wall at an underground excavation site, and particularly to a jig for temporarily preventing the fire block from being raised. The present invention relates to a erection hook for suspension.

[0002]

2. Description of the Related Art In recent years, in a bucking structure for supporting an earth retaining wall at an underground excavation site, in recent years, in order to save labor, an integrated fire which has been blocked in advance has been often used.
That is, as shown in FIG. 1 or FIG. 7, a swelling 22 is attached to a sheet pile 21 driven into the ground in the horizontal direction, and cutting beams 31 and 31 a are erected in a state perpendicular to the swelling. In order to withstand a strong earth pressure, a fired material 32 is attached diagonally at the connection portion between the cutout beam and the cutting beam.
In many cases, a fire block which is previously integrated into a triangular shape by welding or other means via a connecting girder 33 has been used.

[0003]

[Problems to be Solved by the Invention] By preparing a triangular fire block 30 having such a structure in advance, it is possible to reduce the number of assembling steps as compared with a method of individually attaching the cutting beam 31 and the fire material 32 to the belly 22. Therefore, there is an advantage that the construction period can be shortened. Fire block 30 as described above
Is an integral part of each member, such as fire striking, cutting beams, etc., which inevitably increases the mass.In addition, since it is a heavy material that is originally called heavy temporary material, handling has been extremely difficult. Was. That is, the block 30
When attaching to the belly protruding part 22, it was necessary to make many mounting bolts 23 penetrate and to fasten these while being lifted by a crane. However, after aligning the bolt holes of the prong 22 with the bolt holes of the connecting girder 33,
In order to penetrate a large number of mounting bolts 23, it is necessary to finely adjust the position and posture of the fired block 30 which has been lifted, which requires a lot of man-hours and tends to increase the use time of the crane. .

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention is to insert and fix a fired block into both ends of a block in contact with the belly to facilitate attachment to the belly. A main body is a C-shaped vise frame, and a horizontal rod is extended on both wings of the frame. One end of the horizontal rod is supported by the fire block and the other end is supported by an upper edge of a belly. This is to solve the problem of the conventional method.

In the present invention, the lower surface of the screwed portion of the horizontal rod screwed to the right-angled end surface of the pressure-receiving arm of the C-shaped vise frame which is inserted and fixed to the edge of the horizontal reinforcing plate of the fire block is the steel plate surface. , And the lower surface of the projecting portion on both sides or one side may be configured to have a certain step upward with respect to the lower surface of the screwing portion. Further, the threaded portion of the horizontal rod may be vertically symmetrical with respect to the threaded shaft, and the protruding portion on both sides or one side may be vertically asymmetric.

Further, a horizontal rod in contact with the steel plate edge of the block can be integrally attached to the both wings of the frame at the center of a C-shaped vise frame inserted and fixed to the edge of the vertical reinforcing plate by welding or the like. Still further, the lower surface of the one end of the horizontal rod may be configured to have a certain step toward the upper side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. Installation hook 10 of the embodiment
Prior to mounting the fire block 30 of FIG. 1 on the belly 22, the horizontal reinforcing plates 35 provided on the upper surfaces of both ends of the connecting girder 33 in the block are set symmetrically. That is, the hook 10 is attached to a location indicated by a symbol A in FIG. 1 by bolting. 2 is an enlarged view of a portion A in FIG. 1, FIG. 3 is a view as viewed in the direction indicated by an arrow B in FIG. 2, and FIG.

The erection hook 10 according to the first embodiment comprises a C-shaped vise frame 11 and a horizontal rod 12.
Numeral 1 is fixed to the edge of the horizontal reinforcing plate 35 of the fire block by a bolt 13 provided on the pressure side arm 11a. The horizontal rod 12 is screwed to the vertical end surface of the pressure-receiving arm 11b of the C-shaped vise frame 11 by a bolt 14, and the lower surface of the central square portion 12c of the horizontal rod 12 is
The lower surface of the pressure-receiving arm 11b of the vise frame 11 is made flush with the lower surface of the vise frame 11, so that the central square portion 12c and the arm 11b are both in contact with the upper surface of the reinforcing plate 35. It should be noted that one of the projecting portions 12a, 12b on both sides of the horizontal rod 12, as shown in FIG.
If the position of the C-shaped vise frame 11 is fixed so that the tip of the horizontal rod 12 protrudes further outward than the connecting girder 33 from there, it is lifted by a crane. When the fire block 30 is gradually lowered, the fire block 3 is placed with the tip of the protruding horizontal rod naturally placed on the upper edge of the flange of the protuberance 22.
The descent of 0 stops. If it does in this way, the height of the fire block 30 will become exactly the height corresponding to the mounting height,
Moreover, since the fire block 30 is in a stable state with no load swing compared to the suspended state in the air, the mounting bolt 23 can easily penetrate the bolt hole simply by adjusting the position in the horizontal direction. As a result, it becomes extremely easy to fasten the entire heavy fire block to the belly 22.

3 and 5 show the case where the flange height of the connecting girder 33 is equal to the flange height of the protuberance 22, but as shown in FIGS. Can be applied when the heights are different, as well as when they are the same. The fact that the lower surface of the horizontal rod 12 (the lower surface of the central rectangular portion 12c in the case of FIG. 3) is in contact with the upper surface of the reinforcing plate 35 means that the tip of the horizontal rod 12 is When the crane further descends after being placed, the horizontal rod 12 rotates and tilts with the bolt 14 as a fulcrum due to the weight of the firing block 30, thereby exerting a function of preventing the firing block 30 from shifting downward. Further, a step a formed on the lower surface side of the horizontal rod 12 (see a step a between the lower surface of the central square portion and the lower surface of the overhanging portions in FIG. 3 and a lower surface side notch a in FIG. 6) is an upper edge of the flange of the connecting girder 33. And the step between the upper surface of the reinforcing plate 35 and
Alternatively, the upper edge of the flange of the protuberance 22 and the fire block 33
Is made to coincide with the step between them. Therefore, there is naturally a case where the step a is zero.

In FIG. 3, the overhang of the horizontal rod 12 may be provided only on the right side. However, when the horizontal rod 12 is provided on both sides, when the lower surface on one side is damaged, the horizontal rod 12 is reversed and replaced. FIG. 1A shows the place where the erection hook 10 is used.
It can be reused by moving from the part to the opposite side. Further, if the projecting portions on both sides of the horizontal rod 12 are vertically asymmetrical with respect to the mounting bolt 14 as shown in FIG. 5 or left and right asymmetrically as shown in FIG. By attaching to the frame 11, it is possible to cope with the case where there is a step between the upper edge of the flange of the connecting girder 33 and the upper surface of the reinforcing plate 35, or the case where there is a step between the fire block and the belly.

FIG. 7 shows an installation hook 10a according to a second embodiment of the present invention. This hook is effective when applied to a fire block 30 'having the structure shown in the figure.
That is, since the reinforcing plate 36 in the vertical direction is welded to both end surfaces of the connecting girder 33 to the fire block 30 ', the second embodiment discloses the erection hook 10a adapted to this reinforcing plate. In this case, the erection hook 10a is mounted on a vertically provided reinforcing plate 36. FIG.
FIG. 9 is an enlarged view of a portion A in FIG. 7, FIG. 9 is a view as viewed from an arrow B in FIG. 8, and FIG. The erection hook 10a has a configuration in which a horizontal rod 12 'projecting toward both sides from the central portion and a reinforcing rib 15 is welded to a central portion of a C-shaped vise frame 11' to form an integral unit.
It is fixed to the upper edge surface of the vertical reinforcing plate 36 welded to both ends of the connecting girder 33 via bolts 13 '. This bolt 13 '
Is a bolt which is also called a Bulman bolt (trade name). A protrusion having a triangular cross-section is formed at the center of the tip of the bolt and around the bolt, and this protrusion bites into the opposed steel plate surface to form a vertical surface. The structure is fixed.

The lower surface of the horizontal rod 12 'in the hook 10a fixed via the Bullman bolt is connected to a reinforcing plate 36.
And the tip of the rod 12 ′ protrudes toward the belly 22. Therefore, when the fire block 30 'lifted by the crane is gradually lowered, the tip of the protruding horizontal rod 12' is naturally placed on the upper edge of the flange of the belly 22, and the horizontal position is adjusted. The attachment bolt 23 can be easily penetrated into the hole and fastened simply by matching. Fire block 3
In order to withstand the weight of 0 'and maintain its height, the horizontal rod 1
Not only does the lower surface of 2 'contact the upper edge of the reinforcing plate 36 on both sides of the C-shaped vise frame, but also after the special ends described above are applied to the ends of the two bolts 13', the ends of the two bolts 13 ' It is desirable to bite into the surface of the reinforcing plate 36 and take measures to prevent it from sliding easily even under load.

If a predetermined step is provided on the lower surface on the right side of the horizontal rod 12 'as shown in FIG. 9, the C-shaped vise frame 11' is turned over and the reinforcing plate 36 is formed as shown in FIG. By fixing to the upper edge, when there is a step between the upper edge of the flange of the protuberance 22 and the upper edge of the reinforcing plate 36, that is, between the H-beam of the protuberance 22 and the H-beam of the connecting girder 33. Can be accommodated even when the dimensions are different. In the third embodiment shown in FIGS. 12A to 12C, a horizontal rod 12a protruding from both wings of a C-shaped vise frame has a
a, which is welded and fixed to a. In the present invention, the hook may have such a configuration.

[0014]

By using the erection hook of the present invention, the crane can be easily operated and the load is prevented from shaking when the fire-fighting block is mounted on the spar, and the work is safe and efficient. Can also be shortened. That is, conventionally, the fired block and the girder main material integrated by the ground structure were suspended by a crane, carried to the center of the girder, and attached to the bulge. It was necessary to fix the mounting surface of the block by adjusting both heights. However, the use of the hook of the present invention eliminates the need for positioning in the height direction, so that the workability is greatly improved, and furthermore, the safety associated with the crane operation is enhanced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a connection relationship between a fire block and a belly in a first embodiment of the present invention.

FIG. 2 is an enlarged plan view of a portion A in FIG.

FIG. 3 is a view taken in the direction of arrow B in FIG. 2;

FIG. 4 is a view taken in the direction of arrow C in FIG. 2;

FIG. 5 is a front view showing a state where the horizontal rod of FIG. 3 is inverted and attached.

FIG. 6 is a front view showing another embodiment of the horizontal rod.

FIG. 7 is a plan view showing a connection between a fire block and a belly according to a second embodiment of the present invention.

FIG. 8 is an enlarged view of a portion A in FIG. 7;

FIG. 9 is a view taken in the direction of the arrow B in FIG. 8;

FIG. 10 is a view taken in the direction of the arrow C in FIG. 8;

FIG. 11 is a front view showing a state in which the second embodiment is used in a direction opposite to that of FIG. 9;

FIG. 12 is a view showing a third embodiment.

[Explanation of symbols]

 10, 10 'Erecting hook 11, 11' C-shaped vise frame 12, 12 'Horizontal rod 22 Bellows girder 35 Horizontal reinforcing plate 36 Vertical reinforcing plate

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takuya Tamura 1-6-5 Nihonbashi Honcho, Chuo-ku, Tokyo Inside Maruto Sheet Pile Co., Ltd. (72) Inventor Yumiko Iwashita 1-6-6 Nihonbashi Honcho, Chuo-ku, Tokyo No. 5 Inside Maruto Sheet Pile Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) E02D 17/04

Claims (6)

(57) [Claims] 1. A vertical end of a pressure receiving arm of a C-shaped vise frame.
The horizontal rod is screwed to the surface with bolts, and the C-shaped vise frame
Block between the pressure side arm and the pressure side arm
Insert and fix the horizontal reinforcing plate of
The lower surface contacts the upper surface of the horizontal reinforcing plate of the fire block,
One of the overhangs on both sides of the flat stick is placed on the upper edge of the belly
A hook for erection of a fire-fighting block, which is characterized in that 2. A lower surface of said central rectangular portion and said both side projecting portions.
The hook for erection of a fired block according to claim 1, wherein a step is provided on a lower surface of the block. 3. The both-side overhanging part is raised with respect to the bolt.
3. The method according to claim 2, wherein the lower asymmetry or the left / right asymmetry is achieved.
Hook for erection of fire block . 4. From the center of the C-shaped vise frame to both sides
The C-shaped vise fan is provided by welding a horizontal rod
For the frame, insert the vertical reinforcing plate of the fire block with bolts
So that the lower surface of the horizontal rod is
The horizontal rod in contact with the upper edge of the hard plate and further protruding therefrom
Characterized by being placed on the upper edge of the belly . <br/> 5. The hook according to claim 4, wherein the lower surface of the one end of the horizontal rod has a constant step upward. 6. Water overhanging both wings of a C-shaped vise frame
Weld the flat rod and fix it on the pressure receiving side arm of the C-shaped vise frame.
Horizontal reinforcement plate of the fire block between the arm and the pressure side arm
Insert and fix the bottom of the horizontal rod to
One of the overhangs of the horizontal rod in contact with the upper surface of the flat reinforcing plate
Characterized by being placed on the upper edge of the belly .