JPH0680269B2 - How to install safety handrails on the pier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a method for installing a safety handrail on a gantry pier.

[Conventional technology]

In the case of excavation work or construction of a basement floor, when constructing a gantry pier on the premises and carrying an excavator equipped with a clamshell bucket, a tow truck, a dump truck, etc., in the outer periphery of the gantry pier, It is necessary to install safety handrails and take safety measures such as preventing workers from falling.

Conventionally, after constructing a pier pier consisting of a pillar steel frame, a large tow erected on the pillar steel frame, a joist erected between the large tow and a lining plate laid on the joist On the joist steel frame located on the outer periphery of the pier, bolt a plurality of base plates with sheath pipes erected on the upper surface at predetermined intervals, insert a single pipe vertical into each sheath pipe, and A safe handrail was constructed by laying a cloth single pipe between the grounds with a cross clamp or the like.

[Problems to be solved by the invention]

In the above-mentioned conventional example, since the safety handrails are installed after the construction of the gantry pier is completed, there is a possibility that a crash accident may occur during the construction of the gantry pier, especially at the time of laying the lining plate.

In view of the above-mentioned conventional drawbacks, the present invention proposes a method of installing a safety handrail on a gantry pier that can ensure safety even when laying a lining plate.

[Means for solving problems]

The technical means taken by the present invention to achieve the above object are as follows. That is, the installation method of the safety handrail in the gantry pier according to the present invention includes a pillar steel frame, a large tow that is erected on the pillar steel frame, a joist that is erected between the large tow bars, and a lining plate that is laid on the joist. When installing safety handrails on the outer circumference of the gantry pier, the steel beams for joists that should be placed on the outer circumference of the gantry pier are preliminarily grounded, and a plurality of base plates with sheath pipes are erected on the upper surface in advance. Individually, they are attached at predetermined intervals, and a safety handrail is erected upright between the base plates with the lower end of the handrail inserted into the sheath pipe, and then this steel frame is erected on the large towbar. It is characterized by laying a lining board.

[Action]

According to the above configuration, since the safety handrail is completed at the time when the joists are assembled, the liferail is held with the safety handrail or the safety parent handrail or the cross parent rope stretched between the opposing safety handrails. You can walk on the joists by hooking, and you can secure safety even during the laying work of the lining plate.

In addition, since the base plate and the safety handrail are attached to the joist steel frame on the ground in advance, it is safe to attach the base plate to the joist steel frame without leaning out from the gantry pier.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a gantry pier, which is a pillar steel frame 2, a large haul 3 erected on the pillar steel frame 2, a joist 4 erected between the taiki 3, and a lining plate laid on the joist 4. It is composed of 5 and. 6,6 'are safety handrails installed on the outer periphery of the gantry pier 1, and 7 is a baseboard tied to the safety handrails 6,6' (or the sheath pipe 10 described later) with a rubber cord 8 or the like. Prevents falling. 9 is an excavator equipped with a clamshell bucket.

The safety handrails 6 and 6'are installed on the outer periphery of the gantry pier 1 as follows.

That is, while the pillar steel frame 2 and the large tow 3 are being constructed, at an appropriate time, by the work on the ground in advance, the upper flange 4a of the steel frame for joist 4 which should be arranged on the outer peripheral portion of the gantry pier 1 has a top surface 2 A plurality of base plates 11 on which two sheath tubes 10 are erected are attached at predetermined intervals with bolts and nuts 12, and between the base plates 11, a pair of columns 6a, 6a 'and a handrail 6 are provided.
Safety handrails 6 and 6'composed of b and 6b 'are erected in a state where the lower ends of the columns 6a and 6a' are inserted into the sheath tube 10. In addition, the skirting board 7 is previously tied to the sheath tube 10 or the safety handrails 6 and 6'at a suitable height position with a rubber cord 8 or the like.

Then, as shown in FIG. 4, the steel frame for joists 4 is
The lining board 5 is laid on the large tow 3, and then the lining board 5 is laid on the joist 4, and the skirting board 7 is pulled down to a position where the skirting board 7 abuts or comes close to the lining board 5.

The dismantling of the gantry pier 1 is performed by the reverse procedure, and the joist 4 is removed with the safety handrail 6 still attached.

Most of the safety handrails 6, 6 ′ have a constant width and height (for example, the width is set to 2 m and the height is set to about 1.3 m). Safety handrail to be installed 6 '
The width is adjustable, and the excavator 9
The height of the safety handrail 6 ′ located within the rotation path of the counterweight can be adjusted.
These adjustments may be made individually by providing two types of safety handrails for horizontal width adjustment and safety handrails only for height adjustment, but in this embodiment, the horizontal width and It uses a safety handrail 6'which is adjustable in both height.
As shown in FIG. 5, the safety handrail 6'has a handrail portion 6b '.
The inner and outer double tubes are slidably fitted to each other, and the
A'and the sheath tube 10 into which this is inserted are provided with upper and lower pin holes, respectively, and the height is adjusted by selecting the pin hole through which the pin 13 is inserted.

The bolt hole 11a formed in the base plate 11 is a long hole. At the corner of the gantry pier 1, a corner base plate 11 as shown in FIG. 6 is used.

〔The invention's effect〕

The present invention has the above-mentioned configuration, and since the safety handrail is completed when the joist of the gantry pier has been assembled, the safety handrail is provided, or the safety handrail is stretched between the safety handrail and the opposing safety handrail. It is possible to walk on the joists by hooking the life rope on the above-mentioned parental rope, and it is possible to secure safety even during the laying work of the lining board. Since the handrails are attached, it is safe to attach the base plate to the joist steel frame without having to lean out from the gantry pier.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a schematic side view of a gantry pier with safety handrails installed, Fig. 2 is a perspective view of essential parts, Fig. 3 is a sectional view of essential parts, and Fig. 4 is safety. FIG. 5 is a schematic side view illustrating the installation direction of the handrail, FIG. 5 is an exploded perspective view of the adjusting safety handrail, and FIG. 6 is a perspective view of a corner base plate. 1 ... gantai pier, 2 ... pillar steel frame, 3 ... Oki, 4 ... joists, 5
… Lining plate, 6,6 ′… Safety handrail, 10… Sheath pipe, 11… Base plate.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor, Shigeji Shonai, 1-12-19 Minamihorie, Nishi-ku, Osaka City, Osaka Prefecture Hirose Steel Industries Co., Ltd. (56) References )

Claims (1)

[Claims] Claim: What is claimed is: 1. A pillar steel frame and a large tow installed on the pillar steel frame.
When installing safety handrails on the outer periphery of the gantry pier consisting of joists erected between the Ogi and the lining plate laid on the joists, the steel beams for joists to be placed on the outer rim of the pier pier By preliminarily performing work on the ground, a plurality of base plates each having a sheath pipe standing upright on the upper surface were attached at predetermined intervals, and a safety handrail was inserted between the base plates, and the lower end portion thereof was inserted into the sheath pipe. A method of installing a safe handrail on a pier pier, characterized by erected this steel frame on a large tow and laying a lining plate.