JPH0533617Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

This invention relates to a device for attaching a protective net for an erected scaffold, and more particularly to a device for attaching a protective net capable of covering the entire lower surface of a scaffold erected on a structure.

[Conventional technology]

Scaffolding is required for the maintenance, inspection, and repair of structures such as bridges, and scaffolding is generally erected from the ground. Scaffolding that is assembled from the ground poses a traffic hindrance in the case of pedestrian bridges, and cannot be erected from the ground in the case of river bridges. Hanging scaffolding has come into widespread use. In the case of this type of suspended scaffolding, vehicles, ships, and even people pass through the space below the suspended scaffolding, so for their safety, a protective net is installed on the underside of the scaffolding to prevent falling objects and workers from falling. I'm trying to prevent it. For example, as shown in FIGS. 4 and 5, a bridge 2 constructed between the girders of piers 1 and 1 is configured such that both ends thereof are supported by support shoes 3 of the girders. A wire rope 4 is stretched between the supporting shoes 3, 3, and a protective net 5 is supported by the wire rope 4.

[Problem that the idea aims to solve]

In the above-mentioned protective net 5, since the attachment point of the wire rope 4 that suspends it is the support foot 3 on the top of the bridge pier 1, the protective net 5 is modified so as not to interfere with the scaffolding X attached to the bridge 2. Since the fixed point of the wire rope 4 is located at a high position, it will interfere with the scaffolding X if it is stretched tightly. Therefore, it is necessary to tension the wire rope 4 loosely, and the wire rope 4 bends in a curved line as shown in Fig. 4 when viewed from the side, and the protective net is bent toward the center in the width direction when viewed from below. 5, it is not possible to cover the entire area under the scaffolding X, and there are unstrung parts A of the protective net 5 on both sides.
There was a problem in that it was not possible to prevent parts, workers, etc. from falling or falling. Therefore, the purpose of this invention is to cover the entire space under the scaffold with a protective net by tightly tensioning the wire rope.

[Means to solve the problem]

In order to achieve the above-mentioned object, this invention includes a main support column 11 that is suspended from a flange 2A of a structure such as a bridge 2 via an attachment part 12, and a main support column 11 that has one end attached to the main support column 11. , a support member 31 attached to the flange 2A with a vise 32 provided at the other end, a scaffold board 51 attached to the lower end of the support member 31 and the main support column 11 via a support arm 13, An attachment anchor part 21 for the wire rope 4 provided at the lower end of the pillar 11, and a support attached to both lengthwise and widthwise ends of a structure such as a bridge 2 via attachment parts 12, respectively. A plurality of wire ropes 4 are stretched under tension by mounting anchors 21 attached to the lower end of the main pillar 11 and facing each other, and a protective net 5 is stretched between these wire ropes 4.
It is configured to cover the entire lower side of the scaffolding X installed on the structure.

[Effect]

In the device for attaching a protective net for an erected scaffold of this invention, the fixing point of the wire rope 4 is located below the top end of the pier, so the wire rope 4 can be stretched almost horizontally, and the protective net 5 is attached to the bottom of the scaffold X. It is installed throughout the space.

【Example】

Below is the first drawing of the attached embodiment of this invention.
This will be explained with reference to FIGS. 3 to 3. In these figures, the same reference numerals as in the conventional example shown in FIGS. 4 and 5 indicate the same or equivalent parts. Bridges 2, 2 are constructed between the girders of the piers 1, 1, . . . via support shoes 3, and a scaffolding X on which a worker stands is constructed on the bridge 2. Attachment devices 10 for attaching the protective nets 5 are arranged at both ends of each bridge 2 and at both sides in the width direction. That is, a pair of clamping plates 12 as attachment parts that clamp the flange 2A of the bridge 2 are provided at the top end of the main support column 11, and the lower side of the clamping plate 12 and the main support column 11 are connected to each other. The fastening bolts 12A and 12B can be screwed in along the cross-sectional direction, respectively. Further, a support arm 13 is provided at the lower end of the main support column 11.
A pair of bearing plates 13B are provided to support the supporting shaft 13A projecting from one end.
A notch 13X with an open upper side is formed in the notch 13X, and the support shaft 13A can be accommodated in this notch 13X. Above this bearing plate 13B, a supporting hand post 11 is provided.
The fastening plate 21A of the fastening tool 21, which is composed of a pair of fastening plates 21A and 21B that protrudes from the wire rope 4 and serves as an attachment anchor part for the wire rope 4, is fixed, and a fastening plate 21A is fixed to the opposing surface of both fastening plates 21A and 21B. is formed with a horizontal V-shaped groove 21X through which the wire rope 4 is passed.
Bolt holes 21Z are provided at the four corners so that bolts 21Y can be used to tighten the bolts. Furthermore, the main support pillar 1 in the upper part of the fastener 21
1, one end 31A of a crutch-shaped support 31 is fixed by a bolt/nut 31B, and the other end 31C of this support 31 extends diagonally to almost the same level as the top end of the main support column 11. The vise 32 that tightens the flange 2A of the bridge 2 is
It is attached with a nut 32A. This bolt/nut 32A has one end 4 of the suspension chain 41.
1A is locked, and the other end 41B of this suspension chain 41 can suspend and support a support pin 13C protruding from the other end of the support arm 13. The end of the scaffolding board 51 on which the worker stands is placed on the support arm 13 and fixed appropriately. Next, the work of equipping the bridge 2 with the protective net attachment device will be explained. The main supporting column 11 is attached to the bridge 2 by inserting the flange 2A of the bridge 2 between the clamping plates 12 and 12, and screwing in the fastening bolts 12A and 12B from directions perpendicular to each other.
At the same time, the supporting member 31 is also attached to its end 31C.
vise 32 attached with bolts and nuts 32A to
is fixed to the flange 2A of the bridge 2. The end portion 31A of the support member 31 is connected to the bolt/nut 3
It is attached to the main support pillar 11 by 1B. And the bearing plate 13B at the lower end of the main support pillar 11
The support shaft 13A of the support arm 13 is fitted into the notch 13X, and the suspension chain 4 is connected between the support pin 13C at the other end of the support arm 13 and the end 31C of the support member 31.
1 and suspended so that the support arm 13 is in a horizontal state. In particular, the wire rope 4 is connected to the fastening plates 21A and 21 of the fastening tool 21 provided near the lower end of the main support column 11.
A wire rope 4 is stretched almost horizontally under tension, and a protective net 5 is spread out and stretched around the wire rope 4. Therefore, the protective net 5 covers the entire lower side of the scaffolding X on which the worker stands. In the above description, only one end of the bridge 2 was described as shown in FIG. 1, but the same applies to the other end of the bridge.

[Effect of the idea]

As is clear from the above description, the device for attaching the protective net for construction scaffolding of this invention consists of a main support column 11 suspended from a flange 2A of a structure such as a bridge 2 via an attachment part 12, and a main support column 11 suspended from a flange 2A of a structure such as a bridge 2. A support member 31 is attached to the flange 2A with one end attached to the support member 31 and a vise 32 is provided at the other end, and a support arm 1 is attached to the lower end of the support member 31 and the main support column 11.
3, and an anchor part 21 for attaching the wire rope 4 provided at the lower end of the main support pillar 11, and both ends of the structure such as the bridge 2 in the length direction and the width direction. The main supporting pillars 1 are attached to the respective parts via attachment parts 12.
1, a plurality of wire ropes 4 are attached to the lower end portions of the wire ropes 4 by means of attachment anchor portions 21 facing each other.
are stretched under tension, and a protective net 5 is stretched between these wire ropes 4 so as to cover the entire lower side of the scaffolding X erected on the structure. The fixed position of the wire rope 4 can be lowered from the bridge 2 etc., the wire rope 4 can be stretched almost horizontally, and the protective net 5 can be stretched across the entire space under the scaffolding X. It is possible to reliably prevent materials from falling and workers from falling.

[Brief explanation of the drawing]

Figure 1 is an exploded slope view of the installation device for protective nets for construction scaffolding according to this invention, Figure 2 is an overall side view showing an example installed on a bridge, and Figure 3 is a slope view showing one end of an example installed on a bridge. FIG. 4 is a side view of the conventional example, and FIG. 5 is a bottom view of the same. 2... Bridge, 2A... Flange, 4... Wire rope, 5... Protective net, 11... Main support pillar,
12...Holding plate (attachment part), 12A, 12B...
...Tightening bolt, 13... Support arm, 13A... Support shaft, 13B... Bearing plate, 13C... Support pin, 1
3X...notch, 21...fastening tool (anchor part), 2
1A, 21B...Tightening plate, 21X...Groove, 21Y
...Bolt, 21Z...Bolt hole, 31...Supporting material, 31A, 31C...End, 31B...Bolt/nut, 32...Vise, 32A...Bolt/
Nut, 41... Hanging chain, 41A, 41B...
...End, 51...Scaffolding board, X...Scaffolding.

Claims (1)

[Claims for Utility Model Registration] A main support column 11 that is suspended from a flange 2A of a structure such as a bridge 2 via an attachment part 12, and a main support column 11 that has one end attached to it and a vise on the other end. 3
2 and attached to the flange 2A.
1, and a scaffolding board 5 attached to the support member 31 and the lower end of the main support pillar 11 via the support arm 13.
1 and an attachment anchor part 21 for the wire rope 4 provided at the lower end of the main support pillar 11, and the attachment part 12 is provided at both ends of a structure such as a bridge 2 in the length direction and the width direction. A plurality of wire ropes 4 are tensioned by mounting anchors 21 that are attached to the lower end of the main support pillar 11 and are opposed to each other, and a protective net 5 is stretched between these wire ropes 4. established,
An installation device for a protective net for an erected scaffold, characterized in that it is configured to cover the entire lower side of a scaffold X erected on a structure.