JPS6237896Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a scaffolding structure for constructing a silo.

Steel cylindrical silos are commonly used for storing grain, feed, etc. Generally, such a silo is constructed by stacking a plurality of circumferential rings (side plate rings) and welding and joining each circumferential ring. Conventionally, such silos were constructed by supporting a circular scaffold on a bracket protruding from the inner surface of the circumferential ring, and a worker on the scaffold welding the circumferential ring stacked on top. The method used is to lift the scaffold with a crane or the like, support it on the bracket of the next circumferential ring, and then connect it to the upper circumferential ring. However, with this method, many silos are usually constructed as a group, rather than a single silo, so if you try to construct multiple silos in parallel, you will need to construct a large number of scaffoldings in addition to the silos themselves. Furthermore, in the final stage of silo construction, the roof is formed by working on the scaffolding, and after this, it is necessary to perform the complicated and dangerous work of removing the scaffolding from inside the silo. For this reason, the inventors of the present invention first applied for a patent application for a new silo construction method.
- Proposed as No. 124088. This construction method uses a pre-formed roof structure as a scaffold, and the scaffold is suspended and held at the working position from a support provided on the inner surface of the circumferential ring via a hanging device (wire, etc.). After completing the joining of one circumferential ring, the process of lifting it up with a crane or the like and suspending it again from the support at the next working position is repeated, and finally the roof structure serving as the scaffolding is placed at the top. It means installing it.

However, according to subsequent studies by the present inventors, it has been found that the above construction method has the following problems. That is, in order to suspend and hold the scaffold at the working position, as shown in FIG. ring 2
A support piece 6' provided on the inner surface and a hanging tool 10
This is done by connecting. Scaffolding for such work requires workers to stand on it and carry out welding work, so the circumferential ring 2, which is the welding area,
It is necessary to arrange the support piece 6' so that its upper surface is located approximately 120 cm below the upper edge. Therefore, in the method described above, the support piece 6' is attached to the top of each circumferential ring 2, and an appropriate The scaffold is suspended by connecting lengths of hanging tools 10. By the way, in the construction method in which the roof structure 1 is used as a scaffold in this way, before the roof structure 1 is fixed to the uppermost circumferential ring, the structure is installed on the ground in order to install necessary accessories, etc. In order to temporarily extract it from the top of the stacked circumferential rings, its outer diameter is configured to be smaller than the inner diameter virtually formed by the tips of the plurality of roof mounting brackets protruding from the inner surface of the uppermost circumferential ring. There is. Therefore, when this is used as a scaffold, even if the mounting part 9 is provided at the periphery of the structure as shown in FIG. As a result, a relatively large horizontal component P of tensile force due to the structural load acts on the support piece 6' and its attachment portion. In the structure in which the support piece 6' is provided on the upper part of the circumferential ring 2 as shown by the solid line in FIG. This problem has been found to result in interference with alignment. For this reason, as shown by the chain line in Figure 1, the mounting position of the support piece 6' is set closer to the center in the height direction of the circumferential ring (2), and the hanging device 10 is shortened to hang the scaffold. However, in this case, as shown in the figure, the horizontal component force P′ becomes even larger, which is undesirable.
0, there is a problem in that it is inconvenient to attach and detach, and workability is impaired.

The present invention has been devised in view of the above-mentioned difficulties, and aims to provide a scaffolding structure using a roof structure that can be suspended and held in an appropriate position without causing bending of the circumferential ring. For this reason, the present invention provides hanging fixture attachment members having hanging fixture attachment portions at the bottom at multiple locations around the roof structure so as to extend downward, and the roof structure The supporting part provided on the inner surface of the circumferential ring is removably connected to the supporting part provided on the inner surface of the circumferential ring, and is suspended and held within the circumferential ring, thereby constructing a work scaffold. As a result, the scaffold can be suspended and held at an appropriate height with the supporting portion located closer to the center in the height direction of the circumferential ring and with the hanging tool being relatively long.

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

2 to 4 show an embodiment of the present invention. Reference numeral 3 denotes a hanger attachment member provided at the outer edge of the roof structure 1 so as to extend downward, and such hanger attachment members 3 are provided at a plurality of locations around the roof structure. Each hanger attachment member 3 has a hanger attachment portion 31 at its lower portion, which in this embodiment is constituted by an attachment hole. In this embodiment, the above-mentioned hanging fixture attachment member 3 is fixed to the end of the main casing 4 constituting the roof structure.

In addition, at the lower part of each of the hanging fixture attachment members 3, as shown in FIG. is fixed. This abutment plate 5 is attached in an inclined state (angle θ ₁ ) in the radial direction of the roof structure in accordance with the inclination of the inner surface of the hopper. In addition, the hanging tool mounting member 3
When the contact plate 5 is attached to the main hopper which does not pass through the center of the roof structure 1, the abutting plate 5 is inclined (angle θ ₂ ) also in the circumferential direction of the roof structure, and compared with the inner surface of the hopper. Close contact is achieved.

In such a roof structure 1, the attachment part 31 of each hanging fixture attachment member 3 and the support part 6 (support piece) provided on the inner surface of the circumferential ring 2 are removably connected by a hanging fixture 7. By doing so, it is suspended and held within the circumferential ring 2, and a scaffold is constructed. In this embodiment, the hanging device 7 is composed of a wire rope having shackle at both ends.

According to the scaffolding structure described above, as shown in FIG. 2, since the hanging device 7 is connected to the lower part of the hanging device attachment member 3, a long hanging device can be used. , without increasing the horizontal force acting on the circumferential ring, the support part 6 should be positioned closer to the center of the circumferential ring in the height direction, and at an appropriate distance from the upper end of the circumferential ring (for example, 120 to 130 mm).
Scaffolding can be constructed while ensuring the following:

The roof structure 1 is placed in the hopper 8 as shown in FIG. 5 by means of the hanging fixture attachment member 3 and the contact plate 5 fixed to the lower end thereof, and the first stage fixed to the upper part of the hopper is placed inside the hopper 8 as shown in FIG. Constructs a scaffold when attaching the circumferential ring to the hopper.

At this time, the abutting plate 5 serves to form a stable footing within the hopper 8, and also acts to prevent shaking when the roof structure is initially placed in the hopper and transported.

Moreover, the roof structure 1 constituting the scaffold is
After welding and joining the circumferential ring 2a and the upper circumferential ring 2b by a worker, the ring is held by a crane or the like,
In this state, the worker removes each lifting device 7 from each support part 6 and then lifts it up, and the upper circumferential ring 2
It is suspended and held within b.

According to the present invention described above, the suspension attachment members 3 having the suspension attachment portions 31 at the lower part are provided at a plurality of locations around the roof structure 1 so as to extend downward, and the roof structure 1, the hanging tool attachment part 3
1 and a support part 6 provided on the inner surface of the circumferential ring are removably connected by a hanging device 7 and suspended and held within the circumferential ring, thereby forming a work scaffold. 7 can be used with a large length, and for this reason, the position of the support part 6 on the inner surface of the circumferential ring can be moved closer to the center in the height direction of the circumferential ring without increasing the horizontal force acting on the circumferential ring. Moreover, there is an advantage that the scaffold can be constructed while ensuring an appropriate distance from the upper end of the circumferential ring, and deformation of the circumferential ring due to suspension of the scaffold can be properly prevented.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram partially showing a scaffold structure using the previously proposed roof structure. FIG. 2 is an explanatory diagram partially showing an embodiment of the scaffolding structure according to the present invention. 3 and 4 partially show the suspension attachment member in FIG. 2, with FIG. 3 being a side view and FIG. 4 being a view taken along the line - in FIG. 3. FIG. 5 is an explanatory diagram showing a state in which the roof structure constituting the scaffold of the present invention is installed as a scaffold in a hopper. In the figure, 1 is a roof structure, 3 is a hanging fixture attachment member, 6 is a support part, 7 is a hanging fixture, and 31 is a hanging fixture mounting part.

Claims (1)

[Scope of utility model registration request] In a construction scaffolding structure when constructing a silo by stacking multiple circumferential rings and welding them together, hanging fixture attachment members having hanging fixture attachment parts at the bottom are installed at multiple locations around the roof structure. The roof structure is suspended within the circumferential ring by removably connecting the hanging device attachment portion and the support portion provided on the inner surface of the circumferential ring with a hanging device. A scaffolding structure for constructing a silo, characterized in that the scaffolding structure for constructing a silo is configured by being lowered and held to form a working scaffolding.