JP2007039894A - Shock-absorbing and holding device for scaffold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock-absorbing and holding device for a scaffold, which can prevent the appearance of a crack in the concrete side wall of a vertical shaft by cushioning a shock while reducing the shaking of the scaffold during excavation. <P>SOLUTION: A cylinder is mounted on the peripheral part of the scaffold, which is equipped with an excavator, in such a manner that a cylinder rod of the cylinder faces the side wall of the vertical shaft; coils, which are wound with a wire rope 4c, are restrained by being held in a coiled state in the opposed positions of wire rope-wound parts of the coils by restraining members 4a and 4b; the restraining member 4b is pivotally supported in a tiltable manner on the leading end of the cylinder rod; and an abutting member 4d abutting on the side wall of the vertical shaft is mounted on the restraining member 4a, so that the shock during the excavation can be cushioned by the elastic deformation of the coiled wire rope 4c. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a buffer holding device for buffering a scaffold with respect to a side wall of a shaft when excavating a scaffold equipped with an excavator while hanging the shaft within a shaft.

  Conventionally, the scaffold has been provided with a holding device comprising a hydraulic cylinder, and the cylinder is attached to the periphery of the scaffold so that the cylinder rod faces the side wall of the shaft, and comes into contact with the side wall of the shaft at the tip of the cylinder rod. A structure in which the abutment member is pivotally supported, and the scaffold is held at a predetermined distance from the shaft side wall by the holding device during excavation so that the scaffold does not contact the side wall of the shaft due to shaking caused by excavation impact. I have to.

By the way, in the above technique, the scaffold is fixed so that it hardly moves. Therefore, there is a problem that an impact at the time of excavation propagates directly to the side wall of the shaft where the concrete is cast, and the concrete is easily cracked.
JP 2003-106084 A

  The problem to be solved by the present invention is to provide a buffer holding device for a scaffold capable of solving these problems of the prior art and reducing the impact of the scaffold while digging, thereby reducing the impact and preventing the concrete side wall from cracking. It is to provide.

The configuration of the present invention that solves this problem is as follows.
1) A scaffolding holding device for a scaffold that cushions a roll generated when excavating a scaffold equipped with an excavator and suspended in a shaft,
A cylinder attached to the periphery of the scaffold so that the cylinder rod faces the side wall of the shaft,
It consists of a buffer member composed of a coil wound with a wire rope and a pair of restraining members that restrain and hold the coil in a coil shape at a position where the winding portion of the coil faces,
One of the pair of restraining members is attached to the tip of the cylinder rod,
A contact member is attached to the other of the pair of restraining members,
2. The scaffold buffer holding device 2), wherein the abutting member is brought into contact with the side wall of the shaft by the extension of the cylinder rod 2) One of a pair of restraining members and the cylinder rod The scaffolding buffer holding device according to 1), wherein the tip is pivotally attached and the buffering member is tiltable together with the restraining member.

  According to the present invention, the coiled wire rope that is tough and elastically deformed can reliably mitigate the impact during excavation while minimizing the shaking of the heavy scaffolding and propagate the impact to the concrete side wall. Can be prevented to prevent cracks.

  In the present invention, when the restraining member on the rear side of the buffering member is pivotally supported by the cylinder rod so that the buffering member tilts, the swinging / shocking is further coupled with the elastic deformation of the wire rope against the large swing of the scaffold. It is preferable because it can be relaxed flexibly. Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 is an explanatory view of the buffer holding device of the embodiment, FIG. 2 is a longitudinal sectional view of the buffer holding device of the embodiment, FIG. 3 is an explanatory view showing a use state of the buffer holding device of the embodiment, and FIG. It is explanatory drawing which shows a motion of a buffer holding | maintenance apparatus. In the figure, 1 is a buffer holding device, 2 is a hydraulic cylinder, 2a is a cylinder rod, 3 is an outer cylinder, 3a is a mounting plate, 4 is a buffer member, 4a and 4b are restraining members, 4c is a wire rope, 4d is abutting 4e is a pivot shaft, 4f is an inner cylinder, 5 is a scaffold, 5a is a hanging rope, 6 is an excavator, 7 is a holding device, 8 is a kibble, 9 is a formwork, C is a concrete side wall, and G is the ground , T is a shaft.

  As shown in FIGS. 1 and 2, the buffer holding device 1 of the present embodiment attaches a hydraulic cylinder 2 to the inside of an outer cylinder 3 provided with a mounting plate 3 a that is fixed to the lower surface of the peripheral portion of the scaffold 5. A restraining member 4b is pivotally supported at the tip of the cylinder rod 2a by a pivot shaft 4e so as to be tiltable in the vertical direction, and the coil wound by the wire rope 4c is placed by the restraining members 4a and 4b at a position facing the winding portion. The coil is held and restrained.

  The constraining members 4a and 4b are formed with a plurality of holes communicating in the lateral direction, and are attached so as to connect the constraining members 4a and 4b by winding the wire rope 4c in order while passing through the holes in order. The contact member 4d is attached to the member 4a. As shown in FIG. 3, the buffer holding device 1 is attached to the lower part of the periphery of the first and second floors of a three-bed type scaffolding 5. A conventional holding device 7 is attached to the third floor.

  The scaffold 5 is suspended in the shaft T by the suspension rope 5a, the buffer holding device 1 and the holding device 7 are extended, and the ground G is held by the excavator 6 while the scaffold 5 is held in pressure contact with the concrete side wall C. Excavate. The shock / vibration at the time of excavation propagates to the concrete side wall C through the buffer holding device 1 and the holding device 7. At this time, in the buffer holding device 1, the wire rope 4c wound in a coil shape is shown in FIGS. As shown in c), it is absorbed and relaxed by being deformed flexibly, and the propagation to the concrete side wall C is reduced to prevent the occurrence of cracks.

  If the buffer holding device 1 of the present embodiment is used on the third floor of the scaffold 5 provided with the excavator 6, the scaffold 5 is greatly swung by the reaction force during excavation, and the excavation work becomes difficult. Only the third floor uses the conventional holding device 7.

  The buffer holding device for a scaffold according to the present invention is preferably used for a shaft excavation facility using a multi-bed type scaffold.

It is explanatory drawing of the buffer holding | maintenance apparatus of an Example. It is a longitudinal cross-sectional view of the buffer holding | maintenance apparatus of an Example. It is explanatory drawing which shows the use condition of the buffer holding | maintenance apparatus of an Example. It is explanatory drawing which shows a motion of the buffer holding | maintenance apparatus of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buffer holding device 2 Hydraulic cylinder 2a Cylinder rod 3 Outer cylinder 3a Mounting plate 4 Buffer member 4a, 4b Restraining member 4c Wire rope 4d Contact member 4e Pivot shaft 4f Inner cylinder 5 Scaffold 5a Suspension rope 6 Excavator 7 Holding device 8 Kibble 9 Formwork C Concrete side wall G Ground T Vertical shaft

Claims (2)

A buffer holding device for a scaffold that holds the roll generated when excavating a scaffold suspended in a vertical shaft with an excavator,
A cylinder attached to the periphery of the scaffold so that the cylinder rod faces the side wall of the shaft,
It consists of a buffer member composed of a coil wound with a wire rope and a pair of restraining members that restrain and hold the coil in a coil shape at a position where the winding portion of the coil faces,
One of the pair of restraining members is attached to the tip of the cylinder rod,
A contact member is attached to the other of the pair of restraining members,
The scaffold holding device for a scaffold, wherein the contact member is brought into contact with a side wall of the shaft by extension of the cylinder rod.   The buffer holding for a scaffold according to claim 1, wherein one of the pair of restraining members and the tip of the cylinder rod are pivotally attached, and the cushioning member is tiltable together with the restraining members. apparatus.

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