JP2000038835A - Annular scaffold assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widely use a scaffold by connecting support frames erected on the same circumference of a floor face at every nearly equal distance by extensible horizontal connection beams and putting scaffold boards on the connection beams. SOLUTION: Support frames 4 erected on the same circumference of a floor face at every nearly equal distance are mutually connected by connection beams 5, and an annular scaffold 1 is constituted of a scaffold frame 2 in which an intermediate frame 6 is supported between the frames 4 by the beams 5, and a scaffold board 3. The frame 4 is formed of the upper frame in which the lower end is formed by one leg and the top beam 71 for supporting scaffold boards 3 is fixed between the front ends bifurcated to form a Y-shape, a foundation, and a connection column whose connection number can be selected to form a required height. A thin pipe is extensibly inserted in a large pipe to make it possible to fix the beam 5 in a required length, and the adjacent upper frame is integrally formed with an external beam 5a, an internal beam 5b, and an intermediate beam 5c. Fan-shaped scaffold boards 3 having the same length are fixed to the frames 4, 6 by retaining claws. In this way, the annular scaffolds are made light-weight to integrally hoist them. The height and the diameter can be easily changed, and the scaffold can be efficiently assembled while using common materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the assembly of inner and outer peripheries of vertical circular equipment mainly performed in a building, such as iron core work of a large vertical generator, or installation work and maintenance inspection. For improving the scaffolding.

[0002]

2. Description of the Related Art Conventionally, small frame scaffolds have been used for working assembly scaffolding around a large power generating circular device by sequentially moving or arranging a plurality of such scaffolds. However, it takes time to move, set, and adjust the height, and it is not possible to go around the entire circumference at the time of work, and there is a risk that the connection portion is poor in continuity, so that there is a point that workability is lacking.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and efficiently constructs a scaffold with good workability on the inner or outer periphery of a circular device, and increases the height of the scaffold if necessary. It is an object of the present invention to provide a general-purpose scaffold that can be repeatedly used using the same equipment even in the case of circular devices having different diameters or different diameters.

[0004]

According to a first aspect of the present invention, there is provided a scaffolding frame 2 which is assembled by connecting a large number of scaffolds as a whole in a plane polygonal ring.
And a plurality of scaffolding plates 3 detachably mounted on the scaffolding frame 2, the scaffold mounting surfaces are arranged at substantially equal intervals on the same circumference of the floor surface in the radial direction. A plurality of support frames 4 of the same shape, which are arranged and erected, and a plurality of expandable and contractible connection beams 5 of the same shape which sequentially horizontally connect a plurality of locations between the legs of the adjacent support frames 4. The support frame 4 is provided with a plurality of engaging portions 7a to 7c for connecting the connecting beams in advance on its legs in advance, and each of the connecting beams 5 is formed into a thin tube 51a by a thin tube. 51b is inserted so as to be able to expand and contract, and a clamp fitting 52 is provided at the connecting portion so as to be able to freely expand and contract the length of expansion and contraction, and one end of the thick pipe 51a and the other end of the thin pipe 51b are respectively connected to the connecting beam. A locking portion 53 is provided so as to be detachably connected to the engaging portions 7a to 7c. It is an annular assembly scaffold. According to the above invention, since the support frame 4 and the connecting beam 5 are provided, it is possible to efficiently and repeatedly assemble the lightweight and strong scaffold frame 2 forming the frame structure using the common equipment. An annular scaffold can be implemented.

According to a second aspect of the present invention, in the first aspect, an annular frame provided with an intermediate frame 6 supported by each of the connecting beams 5 and erected and provided with a scaffold placement surface in the radial direction. It is an assembly scaffold. According to the present invention, by disposing the intermediate frame 6 between the support frames 4, the number of the support frames 4 is reduced,
It is possible to provide a scaffold with lighter weight and good assemblability. According to a third aspect of the present invention, in the first aspect, each of the connecting beams 5 is provided.
An annular assembly scaffold having a plate receiving clamp 10 in which a tube clamp at the lower end of a telescopic short leg is fixed, and a scaffold support plate is fixed to the upper end of the short leg. According to the invention,
The number of the support frames 4 can be reduced, and a lighter weight scaffold with good assemblability can be provided.

According to a fourth aspect of the present invention, in the first aspect, a connecting flange is provided at a lower end of a single leg made of a tube at the uppermost end of the support frame 4, and the upper end side has a Y-shape. Branches are integrally formed, and the ends of the branches are integrally connected by a top beam 71. Pins or wedge insertion holes are provided on the flanges as the engaging portions 7a to 7c at the Y-shaped root portion and the upper end portion of the branch, respectively. It is a ring-shaped assembled scaffold. According to the present invention, it is possible to stably support the scaffold plate with a simple structure.
And connection between each support frame 4 can be performed reliably and stably. The present invention according to claim 5 according to claim 2, wherein each of the annular scaffolds is removably mounted on the intermediate frame 6 and the support frame 4 in the shape of a plane fan having substantially the same shape, according to the required diameter of the annular scaffold. An annular assembled scaffold comprising a plurality of scaffolding plates 3 laid so as to change the overlapping length of both ends in the circumferential direction. According to the above invention, in claim 2, the center of the circumferential length is fixed to the intermediate frame 6 or the support frame 4, and the overlapping length at both ends is changed, so as to correspond to the change in the diameter of the annular scaffold. Since the scaffold plate 3 is provided, a general-purpose annular scaffold can be implemented.

According to a sixth aspect of the present invention, in the fourth aspect, the upper frame 7 having the top beam 71 on which the scaffold plate 3 is placed is provided at an upper end, and a connection flange 72 is fixed to a lower end.
And a base 8 that supports the flange 72 at the lower end of the upper frame 7 on the floor surface, and a connecting portion that is appropriately connected between the upper frame 7 and the base 8 to increase the number thereof and change the installation height of the scaffold plate 3. A circular assembly scaffold characterized in that the support frame 4 is formed by the pillars 9. According to the above invention, the height of the scaffold plate 3 can be extremely easily changed, and a general-purpose annular scaffold can be implemented.

According to a seventh aspect of the present invention, in the fourth aspect, the three connecting beams 5 divide the space between the engaging portions 7a to 7c of each of the upper frames 7 arranged on the same circumference. An annular assembly scaffold characterized by being connected. According to the above invention, an outer beam 5a that sequentially connects the outsides of the upper frame 7 arranged on the same circumference, an inner beam 5b that sequentially connects the insides, and a middle beam 5c that sequentially connects the middle portions, Are telescopic connecting beams 5
, The diameter of the annular scaffold can be appropriately changed, and a general-purpose annular scaffold can be implemented. Claim 8
The invention according to claim 1 is the annular scaffold according to claim 1, wherein the number n of the support frames 4 is 12. According to the above invention, the number n of the support frames 4 is set to 12, so that the arrangement of the support frames 4 on the floor surface can be quickly and accurately determined by a geometrical method, and the functional size is practically practical. It is possible to adopt various specifications, and to implement a general-purpose annular scaffold with good workability. The invention according to claim 9 is the annular assembly scaffold according to claim 1, wherein the number n of the support frames 4 is other than 12. According to the invention,
An annular scaffold with good workability according to appropriate design conditions can be implemented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a bird's-eye view showing a scaffold frame 2 and a scaffold plate 3 in one embodiment of the annular scaffold 1 of the present invention. FIG. 2 is a front view and a plan view of the support frame 4 in FIG. 1, and includes an upper frame 7, a connecting post 9, and a foundation 8 for supporting them.
Is shown. FIG. 3 is a sectional view and a partially enlarged view showing the connecting beam 5 in FIG. 1, and FIG. 4 is a front view of the intermediate frame 6 and the plate receiving clamp 10 in FIG. FIG. 5 compares the overall shape of the scaffold plane and the overlap length of the scaffold plate 3 for the practical minimum and maximum dimensions of the scaffold 1 when the number n of the support frames 4 is 12. FIG. FIG. 6 is an explanatory view and a side view of the holding claw 31 for fixing the scaffold plate 3. Further, FIG. 7 shows a strut 11 attached to the edge of the scaffold plate and abutting on the inner periphery of the circular device.

An annular scaffold 1 (hereinafter referred to as the present scaffold 1) shown in FIGS. 1 to 6 is composed of a scaffold frame 2 and a scaffold plate 3. The scaffolding frame 2 includes a plurality of supporting frames 4 arranged at equal intervals in a radial section along the same circumference of the floor surface, a number of connecting beams 5 that sequentially connect the supporting frames 4, And a plurality of intermediate frames 6 which are located between the frames 4 and supported by the connecting beams 5. Reference numeral 10 denotes a plate receiving clamp, which supports the lower surface of the intermediate portion of the scaffold plate 3 as necessary. The support frame 4 includes an upper frame 7, a foundation 8, and a connecting post 9. On the upper surface of the upper frame 7, a ceiling beam 71 for directly supporting the scaffold plate 3 is provided. The number of connection columns 9 can be appropriately selected according to the height required by the top beams 71. Also, upper frame 7
The connecting post 9 has a common flange 72 and a common flange 92 which can be used for mutual connection and mounting on the foundation 8, respectively, and engaging portions 7a, 7b, 7c for connecting to the connecting beam 5, The joint 91 is provided.

The upper frame 7 has a monopod at the lower end and a Y at the upper side.
The top beam 71 is branched in a shape like a letter,
And are integrally connected and fixed. And each connection part of them is connected by welding. The engaging portions 7a to 7c are protruded and fixed to a pair of upper portions of the Y-shaped branch portion and a portion immediately below the base of the branch. This engaging portion 7a
7c are formed in a flange shape, and the flange portion is formed as shown in FIG.
As shown in (d), a large number of engaging holes 7d are formed radially. This engaging hole 7d is aligned with the locking hole 53a of the locking portion 53 of the connecting beam 5 as shown in FIG.
3b or a connecting wedge so as to be freely engaged and disengaged.

The connecting beam 5 has a pair of an outer beam 5a, an inner beam 5b and a middle beam 5c, and integrates adjacent upper frames 7 while keeping them parallel to each other. In this scaffold 1, a lower beam (not shown) connecting the connecting columns 9 and a bracing are incorporated. As shown in FIGS. 3A to 3C, each connecting beam 5 includes a telescopic mechanism 51 with a clamp 52 and locking portions 53 at both ends. This telescopic mechanism 51 is a thick pipe 51a.
A thin tube 51b is inserted in a stretchable manner, and a clamp fitting 52 is welded to a joint of the thick tube 51a via a connecting piece 52c. As shown in FIG.
The outer periphery of 1b is detachably fastened and gripped via a T-bolt 52a and a nut 52b. The locking portion 53 is formed of a component having a side surface formed in a U-shape as shown in FIG. 3D, and a locking hole 53a is formed in the component. Then, the locking portion 53 is formed by the flange-shaped engaging portions 7a to 7 of the upper frame 7.
With the pin c interposed therebetween, the locking pin 53b connects the two.
FIG. 3D is a perspective view showing the locking portion 53 of FIG. 3A. Further, since the side U-shaped portion at the tip end of the locking portion 53 is fitted to the locking portion 7c of the upper frame 7 and is wedge-hit, it is possible to eliminate a streak.

As shown in FIG. 4A, the intermediate frame 6 is provided with a ceiling beam 61 on which the scaffold plate 3 is placed.
A pair of clamp fittings 62 are protruded from the lower surface of the pipe 1 and can be moved in the horizontal direction of the horizontal portion of the T-shaped pipe and fixed to an appropriate position so as to be freely detachable. Thereby, the position of the ceiling beam is moved in the radial direction of the entire scaffold, and it is possible to cope with a change in the overall diameter. Further, three clamps 62 provided at each end of the T-shaped pipe are attached to and supported by the outer beam 5a, the inner beam 5b, and the center beam 5c. Simultaneously with or in place of the intermediate frame 6, the plate receiving clamp 10 shown in FIG.
b. This plate receiving clamp 1
Numeral 0 designates a pipe clamp 10a at the lower end of a telescopic short leg 10b fixed to each connecting beam 5, and a scaffold support plate 10c fixed to the upper end of the short leg 10b. Its short legs 1
Reference numeral 0b is formed in a cylindrical shape, an inner screw is provided on the inner periphery, and a screw rod 10d is screwed into and out of the screw, and the disc-shaped scaffold support plate 10c is fixed to an upper end thereof.

Next, FIGS. 6A and 6B are explanatory views of fixing the scaffold plate 3 to the top beam 71 via the holding claws 31. FIG. 6A is a perspective view thereof, FIG. 6B is a perspective view of the holding claws, and FIG. (c) is a partial sectional view showing the state of use, (d) is a side view thereof, and (e) is an example of another scaffold for supporting a scaffold. Slits 71a are cut off from the upper surfaces of both ends of the top beam 71, and a pair of holding claws 31 are inserted into the slits 71a. And the spring mounting hole 31 of the holding claw 31
The spring 31c is locked to a, and the both sides of the scaffold plate 3 are fastened. Next, FIG. 7 shows a strut 11 which is radially mounted around the periphery of the annular scaffold and whose tip is pressed against the inner peripheral surface of the circular device to improve the stability of the scaffold.
The strut 11 includes a screw shaft, a mounting bracket 13 through which the screw shaft is inserted and removed via a pair of nuts 12, a contact portion 14 provided at the tip of the screw shaft,
A rubber material 15 is fitted to the contact portion. Then, the mounting bracket 13 is fixed to the edge of the scaffold plate and the hole on the top beam 61 by the bolt hole 16 and a bolt (not shown).

Next, the scaffold plate 3 is formed in the shape of a fan having the same length, and the center position of the circumferential length is fixed to the intermediate frame 6 or the support frame 4, and two adjacent support frames or intermediate frames 6 are fixed.
In addition, as shown in FIG. 6 (a) or (b), it is fixed together with the adjacent scaffold plate 3 by the holding claws 31. In addition, scaffold board 3
When both ends are arranged on the intermediate frame 6, as shown in the principle diagram of FIG. This is because the intermediate frame 6 is elastically deformable in response to a load, since the connecting beam 5 is elastically deformable, as is clear from FIG. On the other hand, when both ends of the scaffold plate 3 are arranged on the support frame 4, as shown in the principle diagram of FIG. The circumferential length of the scaffold plate 3 in the present scaffold 1 has a double overlap on the inner diameter side over substantially the entire circumference when the scaffold 1 is at the minimum diameter of the set range, and as the diameter increases. The overlap length of the scaffold plate 3 is shortened, and a minimum overlap is formed on the top beam 71 at the maximum diameter. As an example, as shown in FIG.
(= 12) When the angle at which the ceiling beam 71 extends around the center of the scaffold 1 when the diameter is the minimum diameter is α, the sector angle θ at which the scaffold plate 3 extends in the circumferential direction is given by the following equation. θ = (4π / n) −α (1) Further, the shape of the outer peripheral side of the scaffold plate 3 is equal to a circumscribed circle of a regular n-sided shape formed by the scaffold frame 2 when the scaffold frame 2 has the minimum diameter.
The shape on the inner peripheral side is positive n of the scaffolding frame 2 when it is at the maximum diameter.
It is composed of a straight line equal to the rectangular inscribed edge.

In determining the maximum diameter and the minimum diameter of the assembly, when the diameter of the scaffold is small in the diameter direction, a large difference between the two diameters is possible. The main dimensions of the scaffold 1 thus obtained are as follows: the diameter of the inscribed circle of the scaffold 1 is d, and the width of the scaffold (top beam 7
1) is B, the diameter di of the circumscribed circle of a regular n-gon inside the scaffold 1 and the diameter d of the circle on which the support frame 4 is arranged
s, the diameter do of the circumscribed circle, and the angle φ formed by the two sides are respectively expressed by the following equations. di = d / cos (π / n) (2) ds = di + B (3) do = di + 2B (4) φ = π (1-2 / n) (5) The material of the scaffold 3 is to reduce the weight. , An aluminum alloy is used.

Next, the operation will be described. This scaffold 1
The feature is that the diameter and height of the scaffold plane can be changed using the same element equipment. However, the diameter must be changed from the beginning if the target circular device changes,
Once set, it is generally constant and rarely needs to be changed during work. On the other hand, the height often has to be changed during the work. Therefore, the scaffold 1 is particularly easy to assemble and lightweight, and has a structure suitable for height change. The assembling procedure in the case where the basic scaffold plane for assembling is the lowest is as follows.

If it is known whether the position of the scaffold 1 is inside or outside the target circular device, and what the diameter is, the diameter ds of the circumference on which the support frame 4 is installed is (2) to (2). Determined immediately from equation (4). Here, as an example, the number of support frames 4 is n = 1.
In the case of 2, the set position can be geometrically and accurately and efficiently drawn on the floor surface by measuring only one length of the set radius, and without any other measurement. Once the position is determined, the support frame 4 can be installed at a predetermined position. That is, the support frame 4 in which the upper frame 7 and the foundation 8 are temporarily assembled is
The plate 81 is arranged so that it stands upright at a predetermined position and the ceiling beam 71 faces in the radial direction, and is installed by adjusting the foundation bolt 82.

Next, the outer beams 5a, the inner beams 5b, and the middle beams 5c are assembled by fixing the lengths thereof by the clamps 52 of the expansion / contraction mechanism 51. After the assembly is completed, the position and orientation of the support frame 4 are checked again. As described above, the framework of the regular n-sided scaffold frame 2 is integrated. Subsequently, the intermediate frame 6 is temporarily assembled to the connecting beam 5, and the clamp fitting 62 is fastened while confirming the position and posture thereof. By the above procedure, the first-stage scaffold frame 2 of a regular n-gonal shape, which is firmly and accurately integrated, is completed.

Next, the scaffold plate 3 is laid. The first n / 2 (= 6) scaffolding plates 3 are on the top beams 71 of the odd-numbered support frames 4, and the remaining n / 2 (= 6) are on the top of the even-numbered support frames 4. It is fixed to the beam 71. Since this method can be laid in parallel, it is more efficient than the laying method in which the layers are sequentially stacked in one direction. FIG. 5 shows a comparison between the minimum diameter and the case of 1.8 times the diameter. In the figure of the minimum diameter, the situation where the first six sheets are laid is shown. The six scaffolds are represented by dotted lines and the remaining six by solid lines.
Represents the overlapping situation. In this case, when laying on the even-numbered support frame 4, a spacer (not shown) equivalent to the thickness of the scaffold plate 3 is used. However, beforehand
There is also a method of increasing the thickness of 1. Further, mutual clamping of adjacent scaffold plates 3 and handrails 17 are performed.
(FIG. 1) is attached, the laying of the scaffold plate 3 is completed, and the first-stage main scaffold 1 is completed.

In order to increase the height of the main scaffold 1, the whole of the main scaffold 1 is lifted by, for example, four places with a crane except for the foundation 8, and a new supporting column 9 is added to the supporting frame 4 or the connecting column 9. After that, it is placed on the base 8 again. If it is lifted, the refilling operation itself is easy. However, caution is required for lifting. Therefore, the lifting sling is held at an angle as close to vertical as possible. A wire of the same length is hung on the inner diameter side of each of the n (= 12) support frames 4 and gently lifted so that a lifting load is uniformly applied. Lifting weight is W,
Assuming that the angle between the wire and the horizontal is θ, the centripetal force Fo acting on each support frame 4 is expressed by Fo = W / (n · tan θ) (6). Even if θ = 45 °, the magnitude of the centripetal force Fo is equal to the weight supported by each support frame 4. In order to prevent unnecessary centripetal force from acting, it is important to increase the length of the wire and increase θ to suspend the wire. then,
The compressive load Fc exerted on the connecting beam 5 by the centripetal force Fo is expressed by the following equation. Fc = Fo / sin (π / n) (7)

The compressive load reaches several times the centripetal force. However, the basic structure in which the scaffold frame 2 of the present scaffold 1, particularly the upper frame 7 is formed by the connecting beams 5 of the outer beam 5 a, the inner beam 5 b, and the middle beam 5 c is deformed so as to sufficiently withstand these forces. A sufficient margin can be provided for the ratio between strength and scaffold weight. Not only that, the structure in which the three connecting beams 5 are bundled by the intermediate beam 6 acts extremely effectively against buckling of the connecting beam 5 on which a large compressive load is applied during lifting. That is, in general, the buckling load of a long column is inversely proportional to the square of the length of the column, and in this case, the buckling strength is quadrupled. Further, the number of intermediate beams 6 can be increased in advance. When the connecting pillar 9 is incorporated, a lower beam is incorporated. The deformation strength of the scaffold frame 2 against lifting can be further increased. In this case, bracing may be incorporated. However, the circular device targeted by the present scaffold 1 is generally robust, and countermeasures against circumferential dynamic loads acting on the present scaffold 1 are often fixed to the circular device depending on the circular device itself.

Next, the variable range of the diameter of the scaffold 1 will be described. The inscribed circle given by equations (1) to (5) (diameter:
The scaffold plate 3 based on d) has a double overlapping length over the entire area of the support frame 4 except for the top beam 71 when the diameter is minimum, and when the diameter is maximum (diameter: D) is designed so that at least the width of the top beam 61 of the nearest intermediate frame 6 overlaps. The top beam 61 and the top beam 71 have the same width δ, the width of the scaffold plate 3 (the length of the top beam 71) is B, and the support frame 4
Let n be the number of the circles, the diameter ratio D / d of the largest inscribed circle in the settable range to the smallest inscribed circle is: D / d = 2-δ (1 + cos (π / n)) / tan (π / n) / d (8). Here, n = 12, and d = 5 m, δ = 0.1 m, B
Assuming that = 1 m, D / d = 1.85 is obtained. At this time,
Compared with the circumscribed circle of the present scaffold 1, the radial width of the scaffold plate 3 is 0.11 m, which is within the installation range of the handrail whose description is omitted. That is, there is no adverse effect of substantially reducing the width B of the scaffold. It can be said that this is a practical ring scaffold with a wide range of variable diameter.

[0024]

As described above, according to the annular assembly scaffold according to the first aspect, the exclusive supporting frame 4 having the same shape and the connecting beam 5 connecting the supporting frame 4 are provided. It is possible to efficiently assemble the lightweight and rigid scaffolding frame 2 that can cope with integral lifting using common equipment, and a general-purpose annular scaffold can be implemented. According to the second and third aspects of the present invention, the number of support frames 4 can be reduced, and a lighter weight scaffold with better assemblability can be provided. According to the fourth aspect of the present invention, it is possible to stably support the scaffold plate with a simple structure. And connection between each support frame 4 can be performed reliably and stably. According to the fifth aspect of the present invention, in the first aspect, the center of the circumferential length is fixed to the intermediate frame 6 or the support frame 4 and the overlapping length of both ends is changed so that the diameter of the annular scaffold is changed. Since the scaffold plate 3 corresponding to the change of the above is provided, a general-purpose annular scaffold can be implemented.

According to the invention described in claim 6, the scaffold plate 3
Can be changed very easily, and a general-purpose annular scaffold can be implemented. According to the invention as set forth in claim 7, the outer beam 5a that sequentially connects the outer side of the upper frame 7 arranged on the same circumference, the inner beam 5b that sequentially connects the inner side, and the middle part that sequentially connects the intermediate portion are arranged. Since each of the beams 5c is formed of the extendable connecting beam 5, the diameter of the annular scaffold can be appropriately changed, and a general-purpose annular scaffold can be implemented. According to an eighth aspect of the present invention, in the first aspect, the number n of the support frames 4 is set to one.
2, the arrangement of the support frame 4 on the floor can be determined not only quickly and accurately by a geometrical method, but also functional dimensions can be adopted in a practical size.
A general-purpose annular scaffold with good workability can be implemented. According to a ninth aspect of the present invention, in the first aspect, the number n of the support frames 4 is set to one.
Since it is other than 2, an annular scaffold with good workability according to appropriate design conditions can be implemented.

[Brief description of the drawings]

FIG. 1 is a bird's-eye view showing a scaffold frame 2 (including partially separated parts) in one embodiment of an annular scaffold 1 of the present invention.

FIG. 2 is a front view and a plan view of a support frame 4 in FIG. 1,
(A) is its overall front view, (b) is its upper end enlarged view, (c) is its top view, (d) is the DD sectional view of (b), and FIG. Sectional drawing which shows the engagement state of the part 7c and the connection beam 5. FIG.

3A is a sectional view of a connecting beam 5 in FIG. 1, FIG.
(B) is an enlarged front view of the clamp 52, (c) is a side view, and (d) is a perspective view showing an example of an end of the connecting beam 5.

FIG. 4A is a front view of the intermediate frame 6 in FIG. 1,
FIG. 2B is a front view of the plate receiving clamp 10.

FIG. 5 compares the overall shape of the scaffold plane and the overlap length of the scaffold plate 3 for the practical minimum and maximum dimensions of the scaffold 1 when the number n of the support frames 4 is 12. Semicircle explanatory drawing.

FIG. 6 is an explanatory diagram of a holding claw 31 for fixing the scaffold plate 3;

FIG. 7 is a front view of the strut 11;

FIG. 8 is an explanatory diagram in which intermediate frames 6 are arranged at support positions of both ends of the scaffold plate 3;

FIG. 9 is an explanatory diagram in which a support frame 4 is arranged at both end support positions of the scaffold plate 3;

[Explanation of symbols]

 Reference Signs List 1 circular scaffold (main scaffold 1) 2 scaffold frame 3 scaffold plate 31 holding claw 31a spring mounting hole 31b pillow material 31c spring 4 support frame 5 connecting beam, 5a outer beam 5b inner beam 5c middle beam 51 elastic mechanism 51a tube 51b narrow tube 52 Clamping fitting 52a T-bolt 52b Nut 52c Connection piece 53 Locking part 53a Locking hole 53b Locking pin 6 Intermediate frame 61 Top beam 62 Clamping fitting 7 Upper frame 7a Engaging part 7b Engaging part 7c Engaging part 7d Engaging Hole 71 Ceiling beam 72 Flange 8 Foundation 81 Base 82 Foundation bolt 9 Connecting column 91 Engagement part 92 Flange 10 Plate receiving clamp 10a Pipe clamp 10b Short leg 10c Scaffolding support plate 10d Screw rod 11 Strut body 12 Nut 13 Mounting bracket 14 Contact Part 15 Rubber pad 16 Bolt hole 17 Handrail

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Atsushi Otake 1-1-1, Shibaura, Minato-ku, Tokyo F-term in Toshiba head office (reference) 2E003 DA05 DA06 EA00 EB02

Claims (9)

[Claims] 1. A scaffolding frame 2 which is assembled by connecting a large number of scaffolds as a whole in a ring shape of a plane polygon, and a large number of scaffolding plates 3 removably mounted on the scaffolding frame 2. In the annular assembled scaffold, the scaffolding frame 2 is provided with a large number of identically shaped support frames 4 on which the scaffold mounting surfaces are radially arranged and standing at substantially equal intervals on the same circumference of the floor surface. A plurality of extendable and contractible connecting beams 5 of the same shape which sequentially connect a plurality of locations between the legs of the support frame 4 horizontally. Each of the support frames 4 has a plurality of The connecting beams 5 are integrally formed with the engaging portions 7a to 7c, and the connecting beams 5 each have a thin tube 51b inserted into the thick tube 51a so as to be expandable and contractable, and the connecting portion has an expansion and contraction length. A clamp fitting 52 for detachably fixing is provided.
(a) and the other end of the narrow tube (51b) are provided with locking portions (53) projectingly connected to the engaging portions (7a-7c) for connecting the connecting beams, respectively. . 2. The annular assembly scaffold according to claim 1, comprising a plurality of intermediate frames 6 supported by the respective connecting beams 5 and standing, and a scaffold mounting surface is arranged in the radial direction. 3. A large number of fixing members according to claim 1, wherein a tube clamp (10a) at a lower end of a telescopic short leg (10b) is fixed to each of said connecting beams (5), and a scaffold support plate (10c) is fixed to an upper end of said short leg (10b). Plate receiving clamp 1
An annular assembled scaffold with zero. 4. The connecting frame 72 according to claim 1, wherein a connecting flange 72 is provided at a lower end of a single leg made of a tubular material at an uppermost end of the support frame 4, and an upper end side is integrally branched in a Y-shape. An annular shape in which the ends of the branches are integrally connected by a top beam 71, and the Y-shaped base and the upper end of the branch are provided with engaging holes 7d for pins or wedges on the flanges as the engaging portions 7a to 7c, respectively. Assembly scaffold. 5. The annular scaffold according to claim 2, which is removably mounted on the intermediate frame 6 and the support frame 4 in the form of a plane sector having substantially the same shape, and according to the required diameter of the annular scaffold. An annular assembled scaffold comprising a plurality of scaffold plates (3) laid so as to change the overlapping length of the parts. 6. The method according to claim 4, wherein the top beam 71 on which the scaffold plate 3 is placed is provided at an upper end,
An upper frame 7 having a lower end to which a connection flange 72 is fixed, and a foundation 8 for supporting the lower end flange 72 of the upper frame 7 on a floor surface.
A support frame 4 formed by an upper frame 7 and a base 8, appropriately connected between the upper frame 7 and the foundation 8, and a connecting column 9 for increasing the number thereof and changing the installation height of the scaffold plate 3. scaffold. 7. An annular structure according to claim 4, wherein the engagement portions 7a to 7c of the upper frames 7 arranged on the same circumference are connected by the three connection beams 5. Assembly scaffold. 8. The method according to claim 1, wherein the number n of the support frames 4 is one.
2. An annular assembly scaffold, wherein 9. The method according to claim 1, wherein the number n of the support frames 4 is one.
An annularly assembled scaffold characterized by something other than 2.