JPH09177036A - Mounting device for reinforcing steel plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting device which can easily and safely perform the mounting works of reinforcing steel plates to be attached to the periphery of a bridge pier for increasing the anti-seismic performance of the pier, etc. SOLUTION: A mounting device concerned comprises a self-mobile crane 10 equipped with a boom 11 capable of expanding and shrinking and also rising and falling, a device body 13 supported at the tip of the boom 11 in such a way as rising and falling and also swinging oscillatively round a horizontal shaft, and a rise/fall driving means 17 for the device body 13, wherein the body 13 is furnished with a moving piece 28 capable of oscillatively swinging within a certain range round a shaft perpendicularly intersecting the horizontal shaft. The moving piece 28 is equipped with a right-angle contacting plate part to contact with the outside surface of each right-angle side plate part of reinforcing steel plate 2A, 2B having angle section for locating the plates 2A, 2B so that their longitudinal direction is perpendicular to the horizontal shaft, and the right-angle contacting plate part is fitted with a fixture for fixing the steel plate 2A, 2B removably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching a reinforcing steel plate which is attached to the periphery of a bridge pier made of reinforced concrete to increase its seismic resistance.

[0002]

As shown in FIGS. 6 and 7, in order to increase the seismic resistance of reinforced concrete bridge piers of viaducts, as shown in FIGS. 6 and 7, the reinforced area of reinforced concrete bridge piers 1 is reinforced with two chevron cross sections. Work is being carried out to surround the steel plates 2A and 2B, and to fill the mortar 3 between the reinforcing steel plates 2A and 2B and the pier 1 to reinforce the pier 1.

Conventionally, however, when carrying out such a reinforcing work, a heavy steel sheet of reinforcing steel plates 2A, 2B is lifted up to a predetermined height by a crane or the like, and a worker who rides on a bucket (boarding section) of an aerial work vehicle Since the reinforcing steel plate is manually moved and fixed to a predetermined position on the pier, not only a great deal of labor and time is required for the work, but also there is a risk of causing an accident.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reinforcing steel plate attaching apparatus capable of solving the above-mentioned conventional problems, and the means will be referred to in the embodiments described later. Indicated by the reference numerals, a self-propelled crane 10 having a boom 11 that is extendable and retractable, and a device body 13 that is supported at the tip of the boom 11 so that it can be oscillated and swung around a horizontal support shaft 15. And the undulation driving means 17 of the device body 13, and the device body 13 is provided with a movable body 28 which is swingable within a certain range around a support shaft 27 orthogonal to the horizontal support shaft 15, The movable body 28 includes two right and left side plate portions 2 of the reinforcing steel plates 2A and 2B having a chevron cross section.
Right-angled contact plate portions 29, 30 are provided which contact the outer side surfaces of a, 2b and position the reinforcing steel plates 2A, 2B so that their longitudinal directions are orthogonal to the horizontal support shaft 15. Reinforcing steel plates 2A, 2
A fixture 38 for detachably fixing B is provided.

In carrying out the above-mentioned device of the present invention, each of the right angle contact plate portions 29, 30 and each of the right angle both side plate portions 2a, 2b of the reinforcing steel plates 2A, 2B are used as the fixing members 38. Bolt nuts 36, 37 that are fastened at a plurality of positions in the vertical direction
6, 37 may be provided with a spacer portion 39 protruding inward from the right-angled side plate portions 2a, 2b of the reinforcing steel plates 2A, 2B by a certain amount.

Further, each of the right-angled contact plate portions 29 and 30 is provided with a long hole 35 which is long in a direction orthogonal to the length direction of the reinforcing steel plate, and the long hole 35 is used as the fixture 38. Through bolt 36 and right angle contact plate portions 29, 3
A nut 37 that is screwed onto the bolt 36 on the outside of 0 is used, and by removing the nut 37, the bolt 36 is left on the reinforcing steel plates 2A, 2B, and the reinforcing steel plate 2A,
The right angle contact plate portions 29, 30 can be detached from the 2B.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 10 is a conventionally known self-propelled crane (crawler crane),
The boom 11 is extendable and retractable. 1
Reference numeral 2 denotes an up-and-down driving cylinder unit for the boom 11, and a telescopic drive means for the boom 11 is not shown. Reference numeral 13 denotes an apparatus main body, and as shown in FIGS. 2 and 3, oscillates and swings around a horizontal support shaft 15 (also used as a support shaft of the sheave 16) on the front end side of the tip sheave block 14 of the boom 11. It is supported freely and is driven up and down by the up-and-down drive means 17 within a fixed angle range.

The hoisting and driving means 17 is a rocking arm 20 which is supported on the rear end side of the tip sheave block 14 of the boom 11 so as to hoist and swing around a horizontal support shaft 18 (also serving as the support shaft of the sheave 19). And a wire or rod 21 for connecting the free end of the swing arm 20 and the upper part of the apparatus main body 13.
And a wire 23 connected to the free end of the swing arm 20 via a sheave 22, and a winch 24 for winding and unwinding the wire 23.
4 is used for the self-propelled crane 10.

The apparatus main body 13 includes a pair of left and right side plate portions 25 supported by the horizontal support shaft 15, and the left and right side plate portions 2 respectively.
5, and a pair of upper and lower side plate portions 26 fixed to
At the tip of the upper and lower side plate portion 26, a movable body 28 that is swingable within a certain range around a support shaft 27 orthogonal to the horizontal support shaft 15 is provided. This movable body 28 includes right and left side plate portions 2a and 2b in the reinforcing steel plate 2A or 2B having a chevron cross section.
Right-angled contact plate portion 29 for contacting the outer surface of the reinforcing steel plate 2A or 2B so as to position the reinforcing steel plate 2A or 2B in a direction orthogonal to the horizontal support shaft 15 (direction parallel to the support shaft 27). , 30 and a pair of upper and lower mounting plates 31 fixed to the right-angled contact plate portions 29, 30. The upper and lower mounting plates 31 have an arc-shaped elongated hole 32 centered on the support shaft 27. Is provided, and the bolt nut 33 that penetrates the elongated hole 32 in a direction parallel to the support shaft 27 is provided in the device main body 13
The movable body 28 is attached to the upper and lower side plate portions 26 and regulates the swing range of the movable body 28 with respect to the apparatus body 13 within a range of approximately 90 degrees. The right angle contact plate portions 29 and 30 may be formed by bending one iron plate or by welding two iron plates into an angle-shaped steel shape by welding.

As shown in FIGS. 4 and 5, when the right angle contact plate portions 29, 30 and the reinforcing steel plate 2A or 2B are connected to each other, the right angle contact plate portions 29, 30 are formed at two upper and lower positions, respectively. A long hole 35 (the outer end is open to the side of the right-angled contact plate portions 29, 30) long in the direction parallel to the horizontal support shaft 15, and a bolt 36 and a nut 37 penetrating each of the long holes 35. And a fixture 38 consisting of The bolt 36 of the fixture 38 is connected to the nut 37 and the reinforcing steel plate 2A or 2
Flange portion 36a sandwiching B and the right angle contact plate portions 29 and 30
Is provided, and the inner surface of the flange portion 36a and the head portion 36 are provided.
A portion between the outer surface of b and the outer surface constitutes a spacer portion 39.

The method of using the reinforcing steel plate mounting device of the present invention having the above-described structure will be described. The reinforcing steel plate 2A or 2B is previously mounted on the movable body 28 of the apparatus main body 13 by using the fixture 38. Specifically, as shown in FIG. 4, the right and left side plate portions 2 of the reinforcing steel plate 2A or 2B are
The right angle contact plate portions 29 and 30 of the movable body 28 are applied to a and 2b. Right and left side plate portions 2a of the reinforcing steel plate 2A or 2B,
2b is provided with a bolt insertion hole that is aligned with the inner end side of each elongated hole 35 of the right angle contact plate portions 29 and 30, and these bolt insertion holes and right angle contact plate portions 29 and 30 are respectively formed. The bolt 36 of the fixture 38 is inserted from the inside of the reinforcing steel plate 2A or 2B over the vicinity of the inner end of the long hole 35. Then, a nut 37 is screwed and fastened to a bolt 36 protruding from each elongated hole 35 of the right-angled contact plate portions 29 and 30, and the reinforcing steel plate 2A or 2B is attached to the movable body 28 of the apparatus body 13.

Next, as shown in FIG. 1, the boom 11 of the self-propelled crane 10 that has been laid down is erected and extended to a predetermined height, and the winch 24 of the undulation drive means 17 is operated to wind up the wire 23. The device main body 13 is vertically moved around the horizontal support shaft 15 at the tip of the boom by the feeding operation, and the attached reinforcing steel plate 2A or 2B is brought into a vertical posture. Self-propelled crane 1 in this state
0 is run and the reinforcing steel plates 2A or 2B are pressed against the right and left side surfaces 1a and 1b of the pier 1 as shown in FIG.
At this time, the reinforcing steel plates 2A or 2B are pressed in the bisector direction of the right and left side surfaces 1a, 1b of the pier 1, but even if the pressing direction is slightly deviated, the attached reinforcing steel plates 2 or 2B are Since the movable body 28 can be moved to the left and right around the support shaft 27 with respect to the device body 13, the bolt heads 36b of the fixing members 38 can be attached to the bridge pier 1 by the left and right neck down movement of the reinforcing steel plate 2A or 2B.
It is possible to make sure contact with the right and left side surfaces 1a, 1b.

As described above, the bolt head 3 of each fixture 38
In the state where 6b is brought into contact with the right-angled side surfaces 1a, 1b of the pier 1, the right-angled side plate portions 2a, 2 of the reinforcing steel plate 2A or 2B
b is the bolt 36 for each side 1a, 1b at right angles to the pier.
The spacer portion 39 is separated by the length of the spacer portion 39. In this state, the work of fixing the reinforcing steel plate 2A or 2B to the bridge pier 1 is performed by using an aerial work vehicle as is conventionally known. At the time when the reinforcing steel plate 2A or 2B is fixed to the pier 1 side By removing the nut 37 of each fixture 38 as shown in FIG. 5 by an operator boarding an aerial work vehicle, the bolt 36 of each fixture 38 penetrates the inner end side of the elongated hole 35. Therefore, the self-propelled crane 10 is moved backward in the direction of the bisector of the right and left side surfaces 1a and 1b of the pier 1 so as to separate the device body 13 together with the movable body 28 from the reinforcing steel plate 2A or 2B, and the reinforcing steel plate 2A or 2B. The device main body 13 can be removed together with the movable body 28 from 2B.

The undulation driving means 17 of the apparatus main body 13
Also, the structure for attaching the reinforcing steel plate 2A or 2B to the movable body 28 is not limited to the above embodiment.

[0015]

As described above, according to the reinforcing steel plate attaching apparatus of the present invention, the operation of attaching the reinforcing steel plate to the tip of the boom of the self-propelled crane can be performed safely and easily on the ground, for example, by lying down the boom. It is possible to carry out the attached heavy-duty steel plate at a predetermined height by the combination of the boom extension operation and the upright operation, and the undulating movement by the undulating drive means of the device body supported at the boom tip. It is possible to support the reinforcing steel plate in a predetermined position on the pier by supporting it vertically and running the self-propelled crane in such a state.

As described above, the work until the heavy reinforcing steel plate is applied to a predetermined position of the pier can be performed very easily, easily and safely. In particular, according to the configuration of the present invention, the boom The device body supported at the tip is provided with a movable body that can swing within a certain range around a support shaft that is orthogonal to the horizontal support shaft that is the undulation center of the device body. Since the steel plate is attached, as explained above, when the reinforcing steel plate is applied to both sides of the pier at right angles by the traveling of the self-propelled crane, there is a slight difference in the application direction (the traveling direction of the self-propelled crane). Even if there are variations, the reinforcing steel plates will be applied to both sides of the pier at right angles in a self-centering manner. Therefore, the operation of the self-propelled crane is facilitated, and the reinforcing steel plate can be surely applied to the predetermined position.

According to the second aspect of the present invention, a spacer for forming a mortar filling space having a predetermined width is provided between the reinforcing steel plate and the right and left side surfaces of the pier, and the reinforcing steel plate is a right angle contact plate. It can be used as a bolt of a fixture for fixing to the section, and it is not only economical as compared with the case where a spacer must be prepared separately from the bolt, but also the labor of attaching a dedicated spacer is required. I can omit it.

According to the third aspect of the present invention, the right-angled both side plate portions of the reinforcing steel plate and the right-angled contact plate portions on the apparatus main body side can be inexpensively and easily coupled with the bolt nuts. Moreover, even though the directions of these bolts and nuts are not parallel to each other, it is possible to separate the right angle contact plate portion from the reinforcing steel plate simply by removing the nut.
It is easy and easy to remove the device after attaching the reinforcing steel plate.

[Brief description of the drawings]

FIG. 1 is a side view showing a collapsed state and a standing state of a boom.

FIG. 2 is a plan view showing a boom tip portion.

FIG. 3 is a side view showing a boom tip portion.

FIG. 4 is an enlarged cross-sectional plan view of the main part of FIG. 2 in a use state.

FIG. 5 is a cross-sectional plan view of essential parts for explaining a work method for removing the movable body at the tip of the boom from the reinforcing steel plate.

[Fig. 6] Fig. 6 is a perspective view illustrating a method of earthquake-proof reinforcement of a pier.

FIG. 7 is a cross-sectional plan view of a pier reinforced with a reinforcing steel plate.

[Explanation of symbols]

 1 Bridge piers 1a, 1b Right and left side surfaces of bridge piers 2A, 2B Reinforced steel plates with cross-section chevron 2a, 2b Right and left side plate portions of reinforced steel plates 3 Filled mortar 10 Self-propelled crane 11 Boom 13 Device main body 15 Horizontal spindle 17 Lifting of device main body Drive means 20 Swing arm 21 Wire or rod 23 Wire 24 Winch 27 Spindle 28 Movable body 29, 30 Right angle contact plate part 35 Long hole 36 Bolt 37 Nut 38 Fixing device 39 Spacer part

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mizuki Mori 1-244 Kobayashi Higashi, Taisho-ku, Osaka City, Osaka Prefecture Fujii Gumi Co., Ltd.

Claims (3)

[Claims] Claim: What is claimed is: 1. A self-propelled crane equipped with a boom that is extendable and retractable, a device main body supported by a tip of the boom so as to be able to oscillate and swing around a horizontal support shaft, and an oscillating drive of the device main body. The device main body is provided with a movable body which is swingable within a certain range around a support shaft orthogonal to the horizontal support shaft, and the movable body has a right angle in a reinforcing steel plate having a chevron cross section. A right-angled contact plate portion is provided which contacts the outer side surfaces of both side plate portions and positions the reinforcing steel plate so that the length direction thereof is in a direction orthogonal to the horizontal support shaft. A reinforcing steel plate attachment device provided with a fixture for detachably fixing the reinforcing steel plate. 2. The reinforcing member comprises bolts and nuts that fasten each of the right-angled contact plate portions and each of the right-angled side plate portions of the reinforcing steel plate at a plurality of points in the longitudinal direction of the reinforcing steel plate. The reinforcing steel plate mounting device according to claim 1, further comprising a spacer portion that protrudes inward from both right and left side plate portions of the steel plate by a certain amount. 3. An elongated hole extending in a direction orthogonal to the length direction of the reinforcing steel plate is provided in each of the right angle contact plate portions, and the fixture is a right angle contact with a bolt penetrating the elongated hole. A nut that is screwed to the bolt outside the contact plate portion, and the right angle contact plate portion can be removed from the reinforcing steel plate by removing the nut while leaving the bolt on the reinforcing steel plate side. The reinforcing steel plate attaching device according to 1 or 2.