JPH08177224A - Prefabricated scaffolding for curved wall - Google Patents

Abstract

PURPOSE: To construct a safe prefabricated scaffolding having no opening along a curved wall. CONSTITUTION: The upper ends of two steel pipe studs 11 are connected with horizontal-beams 12 for connecting them horizontally and, at the same time, jambs 1 formed by stiffening the studs 11 and horizontal beams 12 with a stiffening member 13 are erected on oblique sides of an isosceles trapezoid in a horizontal plane in a vertical posture. Scaffold boards are built between the horizontal beams 12 of the jambs opposed to each other, and a frame body formed by connecting vertically different fasteners 14 provided up and down of both sides of the opposite jambs 1 with cross braces 3 of a pair of steel pipes intersected at the central part in the shape of an X is constituted as a basic unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding frame for a work scaffold installed along a wall of a support or a building in a construction site such as civil engineering and construction, and is particularly suitable when the wall has a curved surface. Curved scaffolds for curved walls.

[0002]

2. Description of the Related Art Log scaffolds made of cedar wood, which has been abundantly produced nationwide in Japan since ancient times, has been used as a work scaffold to be installed along support walls and walls of buildings at construction sites such as civil engineering and construction. Has been used. Bamboo is still used in Southeast Asian countries. Although these logs and scaffolding boards are not disposables each time, they are often worn out due to corrosion and breakage during use and storage, and today, when resource protection and global environmental protection are being called for, use is becoming less desirable. It is coming.

On the other hand, a steel pipe framework scaffold made of steel pipe was developed early in Europe, which lacks suitable forest resources as a scaffolding material, and was introduced to Japan in the Showa 20's through the United States and should be used repeatedly. As a general rule, it is now commonly used in most construction sites in Japan. Its structure has not changed much since its introduction in Japan. An example is shown in FIG. S
_R is a frame scaffolding, 1 is a building frame, 11 is its vertical pillars,
12 is a horizontal beam that is a horizontal member, 13 is a stiffener that connects them,
14 is a fastener provided on the pedestal 11, 2 is a scaffolding plate, 3 is a cross brace, 4 is a joint that connects the pedestal 11 in the vertical direction, 41 is an arm lock that reinforces this, 5 is the lower part of the pedestal 11. It is a base jack that is installed on the base and adjusts the height of each pedestal 11.

The building frame 1 is a basic constituent member of the frame scaffold S _R. Two steel pipe pedestals 11 and a horizontal beam 12 connecting the upper ends thereof in a horizontal direction are connected by a stiffener 13 It is a steel pipe frame assembled in the shape of a "gate", and is also called "Torii" because of its shape. Taking the case of assembling a frame scaffold along a wall as an example, a pair of building frames 1 and 1 are erected in parallel at a predetermined interval in the direction perpendicular to the wall surface, and a base jack 5 is provided under each pedestal 11. Inserting and facing the building frame 1,
The cross brace 3 is attached between the pedestals 11 of 1 to integrate the four pedestals 11, and the horizontal beams of the upper ends of the opposing building frames 1 and 1
A scaffolding board (cloth frame with board) 2 is laid between 12 and 12 to form a basic unit frame scaffolding. This is designated as the first stage and is indicated by reference numeral I. On this, a second stage is installed with the same configuration as indicated by reference numeral II. At the connecting portion of the first and second stages, the joint 4 is inserted between the upper and lower pedestals 11, and a pin (not shown) is inserted and fixed, and the fastener 14 having the cross brace 3 attached is used to lock the arm 41. Attach. In the same manner, the required number of steps are placed to form a frame scaffold of a predetermined height. The required number of structural units are connected in the horizontal direction as well, but it goes without saying that the building frame 1 can also be used as a framework scaffold on both sides.

Since the steel pipe frame scaffold is constructed as described above, its basic unit has a rectangular planar shape. Therefore, there is no problem if the wall body is straight, but there is a problem when the wall body is to be installed along a curved wall such as a circular water tank or a chimney. For example, FIG. 19 shows a plan view in the case where a standard framework scaffold S _R having a plane size of 1800 × 1200 mm is installed along a wall W having a radius of curvature R = 3700 mm. As is clear from the figure, the smaller the radius of curvature R of the wall W, the more dangerous the gaps are on the rear side (outside) of the framework scaffold S _R. On the contrary, when the shape of the wall body is concave, the front stepping side facing the wall body is opened, which is even more dangerous.

By the way, since the steel pipe framework scaffold is usually a temporary structure, it is disassembled after use, and it is basically stored and reused. Therefore, it is cut into a special shape or size each time it is used according to the site. It is not preferable to do it. Therefore, in the past, in such a case, an extra scaffolding board was placed over this gap to deal with it.
It is rather dangerous because there is no means to fix the stacked scaffolds.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to realize a steel pipe framework scaffold which can be constructed along such a curved wall without forming a gap and has improved safety.

[0008]

According to the present invention as set forth in claim 1, the upper ends of two steel pipe pedestals are connected by a horizontal beam that horizontally connects them, and the pedestal and the horizontal beam are stiffened by a stiffener. The standing frame of the isosceles trapezoid in the horizontal plane in a vertical posture, and a scaffolding board is crossed between the horizontal beams of the opposing building frames.
Basically, a frame body composed of a pair of pipes that cross in an X shape at the center of different fasteners provided on the surface near the upper end and the lower end of the pedestal on both sides of the opposing building frame. It is a framed scaffolding for curved walls.

According to a second aspect of the present invention, the eyepiece provided on at least one end of the pipe member has a long hole portion on the long side and the short side of the isosceles trapezoid in the horizontal plane on which the building frame is erected. The curved frame framework scaffold according to claim 1, wherein the connecting points of the cross braces to the fasteners are different positions.
In the present invention according to claim 3, the cross brace is connected to the fastener via a brace fitting, and the cross brace and the fastener are provided on the long side and the short side of the isosceles trapezoid in the horizontal plane on which the building frame is erected. The connection points of the two are different positions.
The frame scaffold for curved walls described in.

According to the present invention as set forth in claim 4, the long sides are parallel to each other, and the short sides have an isosceles trapezoidal planar shape in which the long sides are inclined in the opposite direction by the same angle from the direction perpendicular to the long sides. The scaffold plate used for the scaffolding for curved wall walls according to claim 1, wherein the clamps attached to both ends of the long side are attached so as to be inclined in the horizontal plane by the inclination angle.

According to a fifth aspect of the present invention, in a cross brace formed by intersecting a pair of pipe members having eyepieces at both ends in an X shape at the center, the eyepieces provided at at least one end of each pipe member are: The cross used for the side surface on the open side of the building frame of the curved wall frame scaffold according to claim 2, wherein the cross section has a long hole portion, and the portion near the center of the long hole portion is covered with a plate member. It is a brace.

According to a sixth aspect of the present invention, in a cross brace formed by intersecting a pair of pipe members having eyepieces at both ends in an X shape at the center, the eyepieces provided at at least one end of each pipe member are: The cross used for the side surface on the closed side of the building frame of the curved wall frame scaffold according to claim 2, wherein the cross section has a long hole portion, and a portion near the tip of the long hole portion is covered with a plate member. It is a brace.

Further, according to the present invention as set forth in claim 7, the upper and lower positions of the plate having holes for engaging with fasteners provided near the upper end and the lower end of the pedestal of the building frame and fastening means fixed to the pedestal. 4. The frame frame scaffolding according to claim 3, wherein the brace attachment lock pin is attached to the surface of the plate by inclining in the horizontal plane at equal inclination angles in opposite directions, respectively. It is a brace fitting.

[0014]

[Operation] According to the present invention, since the planar shape of the framework scaffold is trapezoidal, the scaffold can be installed without forming an opening along the curved wall. For this reason, since the building frame was erected at the position of the hypotenuse of the isosceles trapezoid, the spacing between the pedestals differs between the open side and the closed side, making the scaffolding board an isosceles trapezoid shape and connecting the pedestals. Use a cross brace with different effective lengths on the open and closed sides, or attach the cross brace via brace fittings to keep the pedestal spacing between the open and closed sides. I changed it.

[0015]

【Example】

First Embodiment A first embodiment of the present invention will be described with reference to the drawings. Figure 1
It is a perspective view showing a part of the framework scaffold S _T for curved surface walls made of steel pipe installed along the wall surface W having a curvature, and the same reference numerals are used for the respective members. As shown in this figure, the planar shape of the basic unit of the steel pipe framework scaffold of the present invention is a trapezoid. The building frame 1 is the same as the conventional one because it is also combined with the conventional rectangular frame scaffold and the components are shared as much as possible, but instead of facing in parallel, the building frame 1 is tilted in the shape of a figure eight, that is, in the horizontal plane. In the position of the hypotenuse of the isosceles trapezoid in (3), the scaffolding plate 2 and the cross brace 3 have special specifications.

FIG. 2 is a plan view showing the scaffolding plate 2. The long sides are parallel to each other, and the short sides have an isosceles trapezoidal planar shape inclined in the opposite direction by the same angle from the direction perpendicular to the long sides. Since two scaffolding boards 2 are arranged and used for one horizontal beam 12, the two scaffolding boards are not only isosceles trapezoidal shapes but also have different lengths, and are used on the open side of the building frame 1. The scaffolding board 2a is used for the closed side of the building frame 1
Longer than. The trapezoidal hypotenuse has an inclination angle of θ ₁ = 10 °, while the side length of the scaffolding plate 2a (distance to the center of the clamp) is W ₁ = 1780
mm, W ₂ = 1605 mm, for scaffolding plate 2b W ₁ = 1586 mm, W ₂ = 14
It is 10 mm. Further, since the building frame 1, that is, the horizontal beam 12 (represented by the center line in this figure) is inclined by θ ₁ = 10 °, the clamps 22 provided at both ends of the scaffolding plate 2 are
Both of them are attached by bending θ ₁ = 10 ° from the root. 3A is a plan view of the clamp portion, and FIG. 3B is a front view.

FIG. 4 is a front view showing the cross brace 3 attached to the pedestal 11 (represented by the center line in this figure). The cross brace 3 has a pair of steel pipes 30, 30 riveted in an X-shape in a substantially central portion so as to be rotatable, and an eyepiece 31, which is inserted into a fastener 14 of a column base 11, at an end portion of each steel pipe 30, 32 is provided. Since the building frame 1 is erected in the shape of an isosceles trapezoid, the distance between the pair of building frames 1 and the pedestal 11 is different between the front and the back, and the trapezoidal inclination angle θ ₁ = 10 ° For cross brace 3a used on the side, W = 1790
mm, W = 1394 for cross brace 3b used on the closed side
mm. Since the vertical distance H of the fastener 14 is 1,200 mm, the actual length of the cross brace 3 is the diagonal fastener.
When expressed by the center interval P of 14, P = 2155 mm for the longer side and P = 1839 mm for the shorter side.

In this embodiment, the cross braces 3a and 3b having different effective lengths are made of the same material, and the long brace and the short brace can be immediately distinguished in handling. One of the eyepieces 31 of the cross brace 3 is a regular one having a round hole. Opposite eyepiece
In the case of 32, a long hole portion 33 is provided at the tip portion of the steel pipe 30, and a lock metal fitting 34 is put on this to close a part of the long hole portion 33 for use.

In the case of a cross brace having a long effective length, the eyepiece 32a has a lock metal fitting 34 with a rivet 35 from the center side in a long hole portion 33 provided at the tip portion of the steel pipe 30 as shown in FIG. 5A. By attaching and locking the lock hardware 34 in the direction of the arrow, as shown in (b), the central portion of the long hole portion 33 is closed and a round hole is left near the tip, and a cross brace 3a having a long effective length is formed. To do. FIG. 6 shows FIG.
It is a top view by the AA arrow of (b).

Similarly, in the case of a cross brace having a short effective length, the eyepiece 32b is made of a steel pipe 30 as shown in FIG. 7 (a).
Attach the lock hardware 34 with the rivet 35 from the tip side to the long hole 33 provided at the tip of the lock hardware in the direction of the arrow.
By collapsing 34, as shown in (b), the portion near the tip of the long hole 33 is closed and a round hole is left near the center to form a cross brace 3b having a short effective length. FIG. 8 is a plan view taken along the line BB of FIG. 7B.

The cross braces 3a and 3b are made of the same material as the main body having the circular eyepiece 31 at one end and the long hole portion 33 at the other end, the lock hardware 34, and the rivet 35. Only the position and the mounting direction of the lock hardware 34 are different. Therefore, the parts can be shared in the manufacturing stage, and in the use stage, it is possible to immediately identify which direction the lock metal piece 34 faces.

FIG. 9 is a plan view showing a state in which the cross brace 3 is attached to the pedestal 11 in a direction inclined by an angle θ _{1 in the} horizontal plane. In Fig. 10, the planar shape is the bottom
The curved wall frame scaffold S _T shown in the present embodiment, which is a trapezoid with 1800 mm, an upper base 1394 mm, and a slanted side inclination angle of 10 °, and a standard frame scaffold S, which is a rectangular shape of a conventional product with a long side of 1800 mm.
FIG. 8 is a plan view showing an example in which scaffolds are installed on wall surfaces having various radii of curvature by using _R and.

In (a), only the framework scaffolds S _T for curved walls are installed side by side, which can be applied to the outside of the curved wall having a radius of curvature R ₁ = 3700 mm or the inside of the curved wall having a radius of curvature R ₂ = 5500 mm. . (B) is a frame wall scaffold S _T for curved walls and a standard frame scaffold S _R that are alternately arranged, and are installed on the outside of a curved wall with a radius of curvature R ₁ = 8800 mm or of a curved wall with a radius of curvature R ₂ = 10600 mm. Can correspond to the inner part.

In (c), two frame framework scaffolds for curved walls S _T and standard frame scaffolds S _R are alternately arranged, and are installed outside the curved wall having a radius of curvature R ₁ = 14000 mm, or a radius of curvature R ₂ = Can accommodate the inner part of the curved wall of 15800 mm. In addition, by appropriately mixing the curved frame scaffold S _T with the conventional standard frame scaffold S _R to use, the scaffold can be installed corresponding to various concave or convex wall surfaces.

Example 2 A frame scaffold for curved walls according to a second example of the present invention will be described with reference to the drawings. The frame scaffolding of this embodiment is also similar to the first embodiment in the basic configuration, but in the connecting structure of the fasteners provided near the upper and lower ends of the stanchions in the building frame and the cross brace, the brace metal fittings. This is different from the first embodiment in that the positions of the connecting points are made different by interposing.

FIG. 11 is a front view of the brace fitting 6a, FIG. 12 is a side view, and FIG. 13 is a plan view. 61 is a plate and 62 is a plate 61.
Lock pins attached to the upper and lower two positions on the surface of the plate, 63 are clamps for tightly connecting the plate 61 to the pedestal, and 64 is a hole for engaging a fastener provided on the pedestal. Plate 61
Is engaged with a fastener provided on the pedestal through a hole 64 and fixed to the pedestal by a clamp 63 attached to the back side. The clamp 63 is the same as one generally used for fastening steel pipes to each other in a steel pipe scaffold or the like. The upper end of the plate 61 is bent to the back side (post side), and the tip is matched with the shape of the post.

On the other hand, lock pins 62 are attached to the upper and lower positions of the plate 61. As seen in FIGS. 11 and 13, the upper and lower lock pins are respectively inclined in the opposite directions in the horizontal plane by the same inclination angle θ ₂ = 7.2 °.
FIG. 14 is a front view of the brace fitting 6b. As is clear from comparison with FIG. 11, the mounting directions of the lock pins are opposite, and these are used as a pair on both sides of a pair of cross braces.

FIG. 15 is a plan view showing a part of the frame scaffold for curved walls of this embodiment, in which brace metal fittings 6a and 6b are provided on the short side and the long side of the isosceles trapezoid which constitutes the basic unit. The state where the cross braces 3 and 3 are attached is shown. The distance W ₃ = 1500 mm between the pedestals 11 on the short front tread side, the distance W ₄ = 1800 mm on the pedestals 11 on the long rear tread side, and the cross brace 3 is engaged with the far end of the open lock pin 62 on the front tread side. , The rear side is engaged with the closer side. All the lock pins 62 to be engaged are at right angles to the surface formed by the cross brace 3. In addition, lock pin
Since the intervals of 62 are different, it is necessary to use cross braces 3 of different lengths on the front stepping side and the rear stepping side.

FIG. 16 is a front view taken along the line CC in FIG.
FIG. 16 is a front view of the same as seen from a DD arrow in FIG. If only the curved frame framework scaffolds of this embodiment are continuously installed, it is possible to deal with the outer side portion of the curved wall having the radius of curvature R = 5700 mm. In addition, similar to the first embodiment, the scaffold can be installed corresponding to the wall surfaces of various shapes by installing the scaffold mixed with the standard framework scaffold.

[0030]

According to the present invention, it is possible to construct a safe framework scaffold without an opening for a curved wall, and the used members can be reused. With the improvement, the construction cost is also reduced, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an installation example of a framed scaffold for curved walls of the present invention.

FIG. 2 is a plan view showing an embodiment of the scaffolding plate of the present invention.

FIG. 3A is a plan view and FIG. 3B is a front view showing a part of a scaffolding board according to an embodiment of the present invention.

FIG. 4 is a front view showing a cross brace in the first embodiment of the present invention.

FIG. 5 is a front view showing a part of the cross brace in the first embodiment of the present invention.

FIG. 6 is a plan view showing a part of the cross brace in the first embodiment of the present invention.

FIG. 7 is a front view showing a part of the cross brace in the first embodiment of the present invention.

FIG. 8 is a plan view showing a part of the cross brace in the first embodiment of the present invention.

FIG. 9 is a partial cross-sectional plan view showing a connecting portion between the cross brace and the pedestal in the first embodiment of the present invention.

FIG. 10 is a plan view showing an installation example of the frame scaffolding according to the first embodiment of the present invention.

FIG. 11 is a front view showing a brace fitting in the second embodiment of the present invention.

FIG. 12 is a side view showing a brace fitting in the second embodiment of the present invention.

FIG. 13 is a plan view showing a brace fitting according to a second embodiment of the present invention.

FIG. 14 is a front view showing a brace fitting in a second embodiment of the present invention.

FIG. 15 is a plan view showing a part of the curved wall frame scaffolding according to the second embodiment of the present invention.

FIG. 16 is a front view showing a connecting portion between a cross brace and a pedestal according to a second embodiment of the present invention.

FIG. 17 is a front view showing a connecting portion between a cross brace and a pedestal according to a second embodiment of the present invention.

FIG. 18 is a perspective view of a framework scaffold showing a conventional technique.

FIG. 19 is a plan view showing an example of installation of a conventional framework scaffold.

[Explanation of symbols]

1 Building frame 2 Scaffolding board 3 Cross brace 4 Joint 5 Base jack 6 Brace metal fitting 11 Pillar 12 Cross beam 13 Stiffening material 14 Fastener 22 Clamp 30 Steel pipe (tube material) 31, 32 Eyepiece 33 Long hole 34 Lock metal object (plate member) ) 35 rivets 61 plate 62 lock pin 63 clamp 64 hole S frame scaffold S _R frame scaffold (conventional type) S _T frame scaffold (for curved wall) W wall

Claims (7)

[Claims] 1. The two steel pipe pedestals (11) are connected by a horizontal beam (12) horizontally connecting the upper ends thereof, and the pedestal (11) and the horizontal beam (12) are stiffened by a stiffening material (13). The building frame (1)
It stands upright at the hypotenuse of the isosceles trapezoid in the horizontal plane, and the scaffolding board (2) is bridged between the transverse beams (12) of the opposing building frame (1), and both sides of the opposing building frame (1). Fasteners (1
Frame scaffolding for curved walls, which has a frame unit as a basic unit, which is formed by connecting different upper and lower parts of 4) with a cross brace (3) consisting of a pair of pipe materials (30) intersecting in an X shape at the center. 2. A horizontal plane for erection of a building frame (1)
On the long side and the short side of the equilateral trapezoid, the eyepiece (32) provided on at least one end of the pipe material (30) has the long hole portion (33), and is connected to the fastener (14) of the cross brace (3). The frame scaffold for curved walls according to claim 1, wherein the connection points of the are different positions. 3. A cross brace (3) is connected to a fastener (14) via a brace metal fitting (6), and the long side and the short side of an isosceles trapezoid in a horizontal plane on which the building frame (1) is erected. The framed scaffold for curved walls according to claim 1, wherein the connecting points of the cross brace (3) and the fastener (14) are set at different positions. 4. A clamp (22) having long sides parallel to each other and short sides having an isosceles trapezoidal plane shape inclined from the direction perpendicular to the long sides by the same angle in the opposite direction, and attached to both ends of the long sides. ) Is attached so as to be inclined in the horizontal plane by the inclination angle, the scaffolding plate for use in the curved wall frame scaffold according to claim 1. 5. A cross brace (3) formed by intersecting a pair of pipe members (30) having eyepieces (31, 32) at both ends in an X shape at the center, and at least one end of each pipe member (30). The eyepiece (32) provided has an elongated hole portion (33), and a portion near the center of the elongated hole portion (33) is covered with a plate-like member (34) to form the eyepiece (32). Cross brace used on the open side of the building frame (1) for curved wall scaffolding. 6. A cross brace (3) formed by intersecting a pair of pipe members (30) provided with eyepieces (31, 32) at both ends in an X shape at the center, and at least one end of each pipe member (30). The eyepiece (32) provided has an elongated hole portion (33), and the portion near the tip of this elongated hole portion (33) is formed by blocking with a plate member (34). Cross brace used for the closed side of the building frame (1) of the curved wall scaffold. 7. A plate (1) having holes (64) engaged with fasteners (14) provided in the vicinity of the upper end and the lower end of the pedestal of the building frame (1) and fastening means (63) fixed to the pedestal. The curved surface according to claim 3, wherein lock pins (62) for mounting the brace are attached to the upper and lower positions of the plate (61) inclining in the horizontal plane by equal inclination angles in opposite directions to the surface of the plate (61). Brace fittings used to attach braces to wall framework scaffolds.