JPH0658009B2 - Member connection device for scaffolding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member connecting device such as a temporary scaffold used for construction. INDUSTRIAL APPLICABILITY The present invention is useful as a connecting device for connecting a column provided in the vertical direction and a horizontal stay in the horizontal direction.

[0002]

2. Description of the Related Art Conventionally, as a device for connecting a pillar of a scaffold having a circular tubular pillar body and a lateral stay, there is one disclosed in Japanese Patent Publication No. 54-36407.

In this, a flange-shaped flange member is welded to the main body of the pillar, and a side-surface substantially U-shaped connecting portion that is fitted over the flange member is fixed to the tip of the lateral stay, and the flange member and the connecting portion are provided. A wedge is inserted and connected over the engagement hole. This has a strong fixing force to prevent the rotating force of the lateral stay in the vertical plane, but a weak fixing force to prevent the rotating force in the horizontal plane. That is, it is that the rotational force in the horizontal plane is
It is the frictional force of the abutting portions of the wedge and the engaging hole portion, and the outer peripheral surface of the column main body and the tip of the connecting portion, which does not effectively act on the above-mentioned rotational force. In this sense, since this connecting portion can be said to have a syllable property, it has a drawback that a large number of lateral stays and braces are required to strengthen the scaffold. Therefore,
Assembling the one-sided scaffold by this conventional coupling device,
The one-sided scaffold fluctuates in a direction perpendicular to the vertical plane and becomes extremely unstable, so it cannot be used unless a proper stay is provided from the outside. Moreover, providing such a stay also damages other installations,
In addition, there was a problem in practical use in combination with the difficulty of the work.

[0004]

SUMMARY OF THE INVENTION According to the present invention, the fixing force for preventing the rotational force of the horizontal stay in the horizontal plane is strong, the connecting portion has a rigid property, and the horizontal stay is strong even with a small number of horizontal stays. An object is to provide a member connecting device that can be used as a scaffold.

[0005]

According to the present invention, a pillar of a scaffold or the like is provided with a flange-shaped flange member attached to a cylindrical main body of the pillar, and a lateral stay connected to the pillar has a substantially U-shaped side surface. In the member connecting device in which the connecting part is fixed, and the connecting part is fitted over the flange member and the wedge member is inserted over the engaging holes provided in the flange member and the connecting part, respectively. The horizontal stay is arranged on the radial line passing through the center of the cross section of the column,
An imaginary line that passes through the center of the cross section of the pillar and is parallel to the axis of the lateral stay is set as a reference line A, and the connection portion has a support portion that is biased to one side with the vicinity of the reference line A as a boundary. The wedge is provided on the side of the supporting portion, and the supporting portion abuts the outer peripheral surface of the supporting column at at least two points with an imaginary line C connecting the wedge and the center of the cross section of the supporting column interposed therebetween. , At least one of the contact points is the reference line A
It is characterized in that it is provided above or in the vicinity thereof.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on embodiments with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a vertical column which is a component such as a temporary scaffold, and a plurality of these columns 1 are arranged in parallel at regular intervals. Each post 1
It is connected and supported by a horizontal stay 2 that is temporarily provided in the horizontal direction, and is assembled into a structure having the required strength, shape, and dimensions. The pillar 1 has a pillar main body 3 made of a metal circular tube, and a flange-shaped flange member 4 attached to the pillar main body 3 by welding or the like, while the lateral stay 2 is
Connection parts 6 each having a substantially U-shape in a side view are fixed to both ends of a metal pipe member 5 by welding or the like.

In FIG. 2, the center of the cross section of the column main body 3 is defined as a point P, and the tubular member 5 as the lateral stay 2 is arranged on a radial line passing through this point P, and an imaginary line parallel to the axis of the tubular member 5 is arranged. Let the line be reference line A. In this embodiment, the axis of the pipe member 5 and the reference line A coincide with each other, as is apparent from the figure. Now, the flange member 4 is provided with four engagement holes 7 for inserting a wedge 13 described later at positions equidistant from each other and at a position rotated by an angle B from the reference line A to one side. Has been. The flange members 4 are manufactured by, for example, press punching a metal plate, and are fixed so that the flange members 4 are at the same angular position at two positions in the longitudinal direction of the column main body 3.

On the other hand, the connecting portion 6, as well shown in FIG. 3, is formed in a U-shape in a side view, which is composed of upper and lower side plate portions 8 and 8 and a central plate portion 9. The side plate portion 8 is provided with the support portion 1 on one side (lower side in FIG. 2) of the reference line A.
0 is formed, and the tip of the support portion 10 is formed on an arcuate contact surface 10a having the same outer diameter as the strut body 3 and a center angle of about twice the angle B, It is in contact with the outer peripheral surface of the column main body 3. The other side of the side plate portion 8 with respect to the reference line A, that is, the side opposite to the support portion 10, is a tip portion 11a perpendicular to the reference line A, and a rounded rounded portion 1 subsequent thereto.
1b. In addition, the spacer portion 1 for separating the side plate portion 8 from the flange member 4 is provided on the upper side plate portion 8.
1c is press-molded. The side plate 8 has a reference line A
Engagement holes 12 are provided at positions biased by an angle B toward the support portion 10 side, and these engagement holes 12, 7,
A wedge 13 is inserted over 12 and driven in.

By the wedge 13, both side plate portions 8 and 8 are strongly attracted to the column main body 3 side, and the respective contact surfaces 1
0a and 10a abut on the outer peripheral surface of the column main body 3 and are firmly connected. That is, with respect to the rotational force in the vertical plane that acts on the lateral stay 2 from the outside, the upper and lower two portions of the connection portion 6 are regulated by abutting the pillar body 3 with the flange member 4 interposed therebetween, and thus the horizontal stay in the horizontal plane is suppressed. With respect to the rotational force, the contact surface 10a that is long in the horizontal direction contacts the stanchion body 3 and is regulated with an imaginary line C that connects the wedge 13 and the point P interposed therebetween. Therefore, it can be said that this connecting portion has a rigid property because a strong fixing force that prevents the horizontal stay 2 from rotating in any direction acts. Therefore, if the temporary scaffold is constructed by using the member connecting device of the above-mentioned embodiment, the scaffold can be made strong even with a small number of the lateral stays 2, and the one-side scaffold used especially in a narrow place can be made strong. Therefore, the work is remarkably easy without requiring a separate stay or the like.

To remove the horizontal stay 2 described above, the wedge 13 is pulled out and the horizontal stay 2 can be easily removed by pulling the horizontal stay 2 in the horizontal direction and in the direction in which the supporting portion 10 is present. To connect to the support column 1, the opposite process may be performed. That is, the connecting portion 6 has the contact surface 10a at the tip thereof.
Since the contact surface 10a is only on one side of the reference line A even though the line contact is made in the outer peripheral surface direction of the column main body 3, the horizontal stay 2 is attached and detached between the column main bodies 3 at both ends. Can be done easily. Moreover, since the horizontal stay 2 is arranged on the reference line A, and the contact surface 10a and the support main body 3 are in contact with each other even near the reference line A, the attraction force in the direction of the reference line A is strong, The original function of the lateral stay 2 is not impaired.

Further, since the contact surface 10a is long in the circumferential direction,
If the plate thickness of the side plate portion 8 is also taken into consideration, it means that the plate body 3 is in surface contact, and the surface pressure acting on the column body 3 is significantly reduced. Therefore, the wall thickness of the circular pipe used for the column body 3 is reduced. Even if it is thin, it is less likely to be crushed.

Although the angle B is set to 30 degrees in the present embodiment, it is not particularly limited to this. However, it is preferable that the center angle of the contact surface 10a be about 90 degrees or less, and the angle B be about 1/2 of the angle. The supporting portion 10 has a reference line A.
The contact surface 10a may be slightly short of the reference line A or slightly beyond the reference line A. Although the tip end of the support portion 10 is the arcuate contact surface 10a, it may be a polygonal contact surface, or the contact surface 10a may be knurled or the like to be non-slip. It is also possible to provide individual protrusions and allow these protrusions to come into contact with the column main body 3. As the strut body 3, a reinforcing ring may be fitted on the outer circumference of the circular pipe, or the ring may be integrated with the flange member 4.

In this embodiment, four engaging holes 7 are provided in the flange member 4, but any number may be used. For example, the engaging holes 7 are provided at the reference line A and the target position to make eight holes, respectively.
In the same direction as the connecting portions 6 and 6 at both ends of the horizontal stay 2, the supporting portion 10
Can be provided and connected. Also, as shown in FIG. 4, the circular flange member 4a may be provided with appropriate engaging holes 7a ... Also in a shape and positional relationship different from the engaging hole 7, and may be used for other lateral stays. it can. The flange member 4 may be configured to be attachable to and detachable from the column main body 3. The connecting portions 6 may be provided at both ends of the pipe member 5 so that the supporting portions 10 are in mutually opposite directions, or may be provided in the same direction as described above. However, it is also possible to provide the connecting portion 6 only at one end of the pipe member 5 and attach another continuous member to the other end. The spacer portion 11c may be provided in two or more places, or may be omitted. It is also possible to mount the pipe member 5 in a state in which its axis is displaced from the reference line A. If a suitable protrusion is formed on the lower end portion of the wedge 13 so that the wedge 13 can be inserted into and removed from the engagement hole 7 but does not come off from the upper engagement hole 12, there is no possibility of losing the wedge 13.

[0015]

According to the present invention, with respect to the rotational force acting on the lateral stay from the outside in the vertical plane, the upper and lower portions of the connecting portion projecting on the lateral stay with the flange member projecting on the supporting column being sandwiched therebetween. An imaginary line C that connects the wedge and the center of the cross section of the support column with respect to the rotational force in the horizontal plane
At least two abutting surfaces that are long in the horizontal direction across the abutment are regulated by abutting against the strut body, so that even if the lateral stay tries to rotate in either direction, a strong fixing force acts to prevent it, which causes A strong scaffold can be formed with a small number of lateral stays.

Further, according to the present invention, an imaginary line passing through the center of the cross section of the column and parallel to the axis of the lateral stay is the reference line A.
In this case, since the support portion is formed on one side of the connection portion of the horizontal stay with the vicinity of the reference line A as a boundary, and the wedge is provided on the support portion side, the horizontal stay can be attached and detached. This can be easily performed by moving the horizontal stay horizontally from a certain direction on the support portion side.

Moreover, according to the present invention, the horizontal stays are arranged on a radial line passing through the center of the cross section of the column, and
One of at least two contact surfaces of the above-mentioned support part to the support column
Since the points are provided on or near the reference line A,
Although the horizontal stays can be easily attached and detached as described above, at the time of mounting, the horizontal stays are strongly attracted to the support columns in the direction of the reference line A, that is, the axial direction, to strongly fix the two, and the original horizontal stays are fixed. It has an effect that the function is not impaired at all.

[Brief description of drawings]

FIG. 1 is a front view showing a part of a scaffold according to an embodiment of the present invention.

FIG. 2 is a plan view of the member connecting device.

FIG. 3 is a partial cross-sectional view taken along the arrow III in FIG.

FIG. 4 is a plan view showing another embodiment of the flange member.

[Explanation of symbols]

 A reference line 1 prop 2 lateral stay 3 prop body 4 flange member 4a flange member 6 connection part 7 engagement hole 7a engagement hole 10 support part 10a abutment surface 12 engagement hole 13 wedge

Claims (2)

[Claims] 1. A pillar for scaffolding or the like has a flange-shaped flange member attached to a cylindrical main body of the pillar, and a lateral U-shaped connecting portion is fixed to a lateral stay connected to the pillar. In the member connecting device in which the connecting portion is fitted over the flange member and a wedge is inserted over the engaging holes provided in the flange member and the connecting portion, the connecting portion passes through the center of the cross section of the column. The horizontal stay is arranged on the radial line, and an imaginary line passing through the center of the cross section of the column and parallel to the axis of the horizontal stay is used as the reference line A, and the connection portion is close to the reference line A. A support portion is formed to be deviated to one side with the boundary as a boundary, the wedge is provided on the support portion, and the support portion is at least 2 with an imaginary line C that connects the wedge and the cross-sectional center of the column being sandwiched. The outer surface of the pillar at the point A member connecting device for a scaffold or the like, characterized in that it is in contact with and at least one of the contact points is provided on or near the reference line A. 2. The member connecting device for a scaffold or the like according to claim 1, wherein a tip end of the support portion is formed on an abutment surface having the same shape as an outer peripheral surface of the pillar main body.