JP4389200B2 - Steel bracket and block mounting device for preventing falling bridges - Google Patents

Description

The present invention girders or the like by an earthquake or the like for preventing the dropping from the pier to a mounting device of the steel bracket and block for preventing girder.

  In general, as shown in FIG. 5, a steel bracket S is attached to the bridge girder K, and a concrete block B is attached to the pier L to take measures to prevent the bridge girder K and the like from falling from the pier L during an earthquake or the like. It has been broken.

Conventionally, as a technique for attaching the concrete block to the bridge pier, an anchor is placed under the girder, a chain block is attached thereto, the concrete block is raised by the chain block and carried to a predetermined position, and suspended in the air. It was moved to the mounting position by human power, and the hole of the concrete block was aligned with the anchor bolt that was previously mounted on the pier, and was attached to the pier.
Conventionally, as shown in FIG. 6, a mounting jig N is provided at the tip of a crane boom M, a concrete block B is set on the mounting jig N, and the block is attached to the pier while adjusting with the boom. There was a technology to move to a position. (For example, see Patent Document 1)

  However, mounting with the above-mentioned chain block takes a long time because it is dangerous and difficult work because the heavy load of the concrete block must be moved in an unstable state in a narrow space without overhead clearance and aligned with the bolt hole In addition to this, there is a problem in that it is necessary to separately assemble a scaffold for work or a wire is hung on the block, so that the block is missing and the quality is deteriorated.

Further, in the case of using the attachment jig N at the tip of the crane boom M of Patent Document 1, it is difficult to adjust the position and posture of the block, which takes time and labor, and the crane must be moved for each block. did not become. In addition to requiring a scaffold, there is also a problem that it is necessary to remove the handrail of the scaffold in order to prevent interference with the boom, which is a dangerous work.
JP-A-11-147691

The problem to be solved by the present invention is that the position and posture can be adjusted with high accuracy and efficiency at the time of mounting the block, and the steel bridge for preventing falling bridges can be safely installed without using a scaffold . It is to provide a mounting device of the bracket and block.

The steel bridge and block mounting device for preventing a falling bridge according to the present invention is used for preventing a falling bridge by attaching a steel bracket to a bridge girder and attaching the block to a bridge pier that supports the bridge girder to prevent the bridge girder from falling from the pier. in the mounting apparatus of the steel bracket and blocks, elevation and a pivotable and extendable boom aerial platforms having a working deck at the tip portion of the reciprocating movable in the longitudinal direction together with the attached taken on the working deck a longitudinal slide deck Ru provided with mounted vertically movably through a lifting means on said front post slide deck, a lifting frame for lifting operations by workers on board on the working deck, on the elevating frame 3 Attachable to the posture via a point-supported posture control bolt and attachable to the block. Possible, made, the block sets the frame for performing attitude control operation by workers on board on the working deck, the block is characterized by being configured to attach to the pier. In addition, an attachment jig is fixed to the block set frame, the steel bracket is detachably set, and the steel bracket is attached to a bridge girder.

Mounting device girder preventing steel bracket and block of the present invention can be efficiently performed by adjusting the height accuracy of the position and orientation during mounting of the block, also be carried out scaffold securely mounting work needed There is an advantage that you can.

  FIG. 1 shows an aerial work vehicle equipped with a mounting device according to the present invention. Reference numeral 1 denotes a boom that can be lifted and swung freely, and 2 is a work deck provided at the tip of the boom 1. The work deck 2 can be turned by a turning shaft 2a. A handrail 2 b is provided around the deck 2. 3 is an outrigger.

  FIG. 2 shows an embodiment of the block mounting device of the present invention, which is mounted on the front / rear slide deck 2-2 installed on the work deck 2 indicated by a virtual line. The block mounting device mainly includes a device mounting frame 4, an elevating means 7, an elevating frame 8, and a block set frame 9.

  The elevating means 7 is provided between the device fixing frame 6 and the elevating frame 8 and is configured in a pantograph manner. For example, the elevating frame 8 is moved up and down by a hydraulic drive means 7a (see FIG. 2B). It reciprocates (lifts) in the direction (arrow Z). Reference numeral 7b denotes an operation rod.

  The block set frame 9 is attached to the elevating frame 8 via a three-point supported posture control bolt 9a so that the posture (tilt) can be controlled. By adjusting the three posture control bolts 9a, the posture of the block set frame 9, that is, the inclination with respect to the horizontal is adjusted. On the block set frame 9, a fixed frame 9b for setting a block is erected.

  Since the apparatus of the present embodiment is configured as described above, the block B is set on the block set frame 9 as shown in FIG.

  Subsequently, the aerial work vehicle 1 is moved to an appropriate position on the work site and stabilized by the outrigger 3. When the preparation is completed, the boom is operated to move the work deck to the vicinity of the block B mounting position. In this case, the work deck 3 is turned to adjust the direction of the block B in advance. This orientation adjustment may be performed together with position / posture control described later.

  Next, the elevating frame 7 is moved up and down by the elevating means 7 and the mounting bolts in which the mounting holes of the block B are driven in advance while finely adjusting the inclination of the block B by the three attitude control bolts 9b. And insert and fix. These fine adjustment operations are performed by workers on the work deck 2.

  FIG. 4 shows a mounting jig 10 for the steel bracket S. The mounting jig 10 is fixed on the block set frame 9 and the steel bracket S is set on the mounting jig 10. The steel bracket S is attached in the same manner before the block is attached.

It is a front view of an aerial work vehicle equipped with the attachment device of the present invention. It is the top view (A), side view (B), and front view (C) which show one Example of the attachment apparatus of this invention. It is attachment explanatory drawing of the block by the apparatus of FIG. It is attachment explanatory drawing of the steel bracket by the apparatus of FIG. It is attachment explanatory drawing of the block bracket for the conventional fall bridge prevention. It is explanatory drawing of the conventional block attachment apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Boom 2 Work deck 2a Rotating shaft 2-2 Front / rear slide deck 3 Outrigger 4 Guide rail 5 Left / right slide frame 6 Front / rear slide frame 7 Lifting means 7a Actuator 7b Operating rod 8 Lift frame 9 Block set frame 9a Posture control bolt 9b Fixed frame 10 Mounting jig B Block S Steel bracket

Claims (2)

A steel bracket is attached to the bridge girder, and a block is attached to the pier supporting the bridge girder to prevent the bridge girder from falling off the pier. and aerial platforms having a distal working on deck boom possible, the longitudinal slide deck Ru provided to be reciprocated in the longitudinal direction together with the attached taken on the working deck, the lifting means on said front post slide deck And a lift frame that is lifted and lowered by a worker on the work deck, and a posture control bolt that is mounted on the lift frame via a three-point supported posture control bolt. The above blocks can be removably attached, and posture control operations can be performed by workers on the work deck. Performing a block set frame consists, the block girder preventing steel bracket and block mounting apparatus characterized by being configured to attach to the pier to. 2. The bridge bridge prevention structure according to claim 1, wherein an attachment jig is fixed to the block set frame, the steel bracket is detachably set, and the steel bracket is attached to a bridge girder. Steel bracket and block mounting equipment.

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