JPH0220786B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Object of the Invention/Field of Industrial Application) The present invention relates to a device for connecting members such as temporary scaffolding used in construction. INDUSTRIAL APPLICABILITY The present invention is useful as a connecting device for connecting a column provided in a vertical direction and a horizontal stay.

(Prior Art) Conventionally, there is a device described in Japanese Patent Publication No. 54-36407 as a device for connecting a horizontal stay to a scaffolding support having a cylindrical support main body.

This involves welding a brim-shaped flange member to the main body of the support, fixing a connection part with a substantially U-shaped side surface that straddles the flange member to the tip of the side stay, and making an engagement hole in the flange member and the connection part. They are connected by inserting wedges across them. This has a strong fixing force that prevents rotational force in the vertical plane of the horizontal stay, but a weak fixing force that prevents rotational force in the horizontal plane. That is,
What receives the rotational force in the horizontal plane is the frictional force of the parts where the wedge and the engagement hole are in contact with each other, and the outer peripheral surface of the column body and the tip of the connection part, respectively, and this is due to the rotational force mentioned above. It does not work effectively against. In this sense, this connecting part can be said to have a glide-like property, so it has the disadvantage of requiring a large number of horizontal stays and braces to strengthen the scaffolding. Therefore, if one side of the scaffold is assembled using this conventional connecting device, the one side of the scaffold will sway in a direction perpendicular to the vertical plane, resulting in a very unstable condition. Therefore, it is necessary to install an appropriate stay from the outside. It cannot be used without it. In addition, providing such a stay would damage other installed objects, and this together with the difficulty of the work posed a problem from a practical standpoint.

(Objective of the Invention) The present invention has a strong fixing force that prevents rotational force in the horizontal plane of the horizontal stay, a connecting part has a rigid property, and even a small number of horizontal stays can provide a strong scaffolding. The object of the present invention is to provide a member connecting device that can perform the following functions.

(Technical Means of the Invention) The present invention provides that a support for a scaffolding or the like has a flange member attached to a cylindrical support main body, and a side stay connected to the support has a substantially U-shaped connection on the side. In the member connecting device, the connecting portion is fitted over the flange member, and the connecting portion is connected by inserting a wedge across engagement holes provided in the flange member and the connecting portion, respectively. A horizontal stay is arranged on a radial line passing through the center of the cross section of the strut, and an imaginary line passing through the center of the cross section of the strut and parallel to the axis of the horizontal stay is defined as a reference line A, and the connecting portion A support part is formed only on one side with the vicinity of the reference line A as the boundary,
The wedge is provided at a position offset from the reference line A toward the support portion, and the support portion is located at at least two points on the support portion across an imaginary line C connecting the wedge and the center of the cross section of the support support. It is characterized in that it comes into contact with the outer circumferential surface, and at least one of the contact points is provided on or near the reference line A.

(Examples) Hereinafter, the present invention will be described based on examples and with reference to the drawings.

In FIG. 1, reference numeral 1 denotes vertically provided columns 1 that are constituent members of a temporary scaffolding, etc., and a large number of these columns 1 are arranged side by side at regular intervals. Each support column 1 is connected and supported by horizontal stays 2 temporarily installed in the horizontal direction, and is assembled into a structure having the necessary strength, shape, and dimensions. Pillar 1
has a column main body 3 made of a metal circular tube, and a brim-shaped flange member 4 attached to the column main body 3 by welding or the like, while the horizontal stay 2 is made of a metal tube 5. Connecting parts 6 that are approximately U-shaped when viewed from the side at both ends.
is fixed by welding etc.

In FIG. 2, the center of the cross section of the strut body 3 is taken as a point P, and the pipe material 5, which is the horizontal stay 2, is placed on a radial line passing through this point P, and an imaginary line parallel to the axis of the pipe material 5 is placed. Let it be the reference line A. In this embodiment, the axis of the tube material 5 and the reference line A coincide with each other, as is clear from the figure. Now, flange member 4
, four engaging holes 7 for inserting wedges 13, which will be described later, are provided at positions that are equally spaced from each other and rotated by an angle B degree in one direction from the reference line A. This flange member 4 is manufactured, for example, by press punching a metal plate, and each flange member 4 is formed at two locations in the longitudinal direction of the support main body 3.
are fixed at the same angular position.

On the other hand, as clearly shown in FIG. 3, the connecting portion 6 is formed into a U-shape in side view, consisting of upper and lower side plate portions 8, 8 and a central plate portion 9. A support portion 10 is formed on the side plate portion 8 on one side of the reference line A (lower side in FIG. 2), and the tip of this support portion 10 has the same diameter as the outer diameter of the column main body 3. The contact surface 10a is formed into an arcuate shape having a central angle approximately twice the angle B, and is in contact with the outer peripheral surface of the support main body 3. The other side of the side plate part 8 from the reference line A, that is, the side opposite to the support part 10, is formed with a tip part 11a perpendicular to the reference line A and a rounded part 11b following the tip part 11a. Furthermore, a spacer portion 11c for separating the side plate portion 8 from the flange member 4 is press-molded on the upper side plate portion 8. The side plate portion 8 is provided with an engagement hole 12 at a position shifted by an angle B toward the support portion 10 from the reference line A, and a wedge 13 is provided across these engagement holes 12, 7, and 12. has been inserted and typed.

By this wedge 13, both side plate parts 8, 8 are strongly attracted to the side of the column main body 3, and the respective contact surfaces 10a, 10a abut against the outer circumferential surface of the column main body 3, and are firmly connected. In other words, for the rotational force in the vertical plane that acts on the horizontal stay 2 from the outside,
The two upper and lower parts of the connection part 6 are in contact with the support main body 3 with the flange member 4 in between, and the rotational force in the horizontal plane is regulated by an imaginary line C connecting the wedge 13 and the point P.
A horizontally long abutting surface 10a that is sandwiched therebetween is in contact with and regulated by the support main body 3. Therefore, no matter which direction the horizontal stay 2 attempts to rotate, a strong fixing force is applied to prevent it from rotating, so this connecting portion can be said to have rigid joint properties. Therefore, when a temporary scaffold is constructed using the member connecting device of the above embodiment, a small number of horizontal stays 2
This also makes it possible to make a strong scaffold, and in particular, even a one-sided scaffold used in a narrow place can be made strong, and the work becomes extremely easy without the need for a separate stay or the like.

To remove the above-mentioned horizontal stay 2, remove the wedge 13 and pull the horizontal stay 2 horizontally and in the direction of the support section 10. To connect to 1, do the opposite. In other words, although the contact surface 10a at the tip of the connecting portion 6 makes line contact in the direction of the outer peripheral surface of the column main body 3, since the contact surface 10a is only on one side of the reference line A, the horizontal stay 2 It is easy to attach and detach between the support bodies 3 and 3 at both ends of the column. 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 near the reference line A, the attractive force in the direction of the reference line A is strong.
The original function of the horizontal stay 2 is not impaired.

Furthermore, since the abutment surface 10a is long in the circumferential direction, if the thickness of the side plate portion 8 is also considered, it will be in surface contact with the column main body 3, and the surface pressure acting on the column main body 3 will be significantly reduced. Therefore, even if the wall thickness of the circular tube used for the support main body 3 is thin, the risk of crushing is reduced.

In this example, the angle B was 30 degrees, but
It is not particularly limited to this. However, it is preferable that the central angle of the abutting surface 10a is about 90 degrees or less, and the angle B is about 1/2 of that. The support portion 10 may be provided on one side with the vicinity of the reference line A as a boundary, and therefore, there is no problem even if the contact surface 10a is slightly short of the reference line A or slightly exceeds the reference line A. Although the tip of the support portion 10 is an arcuate abutment surface 10a, it may be a polygonal abutment surface.
The abutting surface 10a may be knurled or the like to prevent slipping, or the abutting surface 10a may be provided with a finite number of protrusions so that these protrusions abut against the column body 3. The strut body 3 may be a circular tube with a reinforcing ring fitted around the outer periphery.
This 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 engagement holes 7 are provided at the reference line A and the target position, respectively.
They can be connected by providing support parts 10 in the same direction of the connecting parts 6, 6 at both ends of the horizontal stay 2.
Further, as shown in FIG. 4, a circular flange member 4
It is also possible to provide suitable engagement holes 7a in shapes and positional relationships different from those of the engagement holes 7 in a, and use them for other horizontal stays. The flange member 4 may be configured to be detachable from the support main body 3. The connecting portions 6 may be provided at both ends of the tube material 5 so that the supporting portions 10 are in 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 tube 5 and to attach another continuous member to the other end. The spacer portions 11c may be provided at two or more locations, or may be omitted. It is also possible to install the tube 5 with its axis shifted from the reference line A. By forming a suitable protrusion on the lower end of the wedge 13 so that it can be inserted into and removed from the engagement hole 7 but cannot be removed from the upper engagement hole 12, there is no risk of the wedge 13 being lost.

(Effects of the Invention) According to the present invention, in response to a rotational force in a vertical plane that acts on the horizontal stay from the outside, the upper and lower connecting portions protruding from the horizontal stay sandwich the flange member protruding from the support. Two points are regulated by contacting the support body, and in response to rotational force in the horizontal plane, at least two long contact surfaces in the horizontal direction across the imaginary line C connecting the wedge and the center of the cross section of the support are regulated. It is regulated by coming into contact with the main body of the column, so even if the horizontal stay tries to rotate in either direction, a strong fixing force acts to prevent it, and this creates a strong foothold with a small number of horizontal stays. can do.

Further, according to the present invention, if the reference line A is an imaginary line that passes through the center of the cross section of the support and is parallel to the axis of the horizontal stay, then the connecting portion of the horizontal stay has a border near the reference line A. Since the support part is formed only on one side, and the wedge is provided at a position offset from the reference line A toward the support part side, the horizontal stay can be installed and removed from a certain direction on the support part side in the horizontal direction. This can be easily done by moving the horizontal stay.

Moreover, according to the present invention, the horizontal stay is arranged on a radial line passing through the center of the cross section of the support, and one of the at least two abutting surfaces of the support to the support is aligned with the reference line A. Although it is easy to install and remove the horizontal stay as described above, when installing it, the horizontal stay is strongly pulled to the support in the direction of reference line A, that is, in the axial direction. This has the effect of strongly fixing the lateral stay without impairing the original function of the lateral stay.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view showing a part of the scaffold, FIG. 2 is a plan view of a member connecting device, FIG.
The figure is a plan view showing another embodiment of the flange member. A... Reference line, 1... Support, 2... Horizontal stay,
3... Support main body, 4, 4a... Flange member, 6
... Connection part, 7, 7a, 12 ... Engagement hole, 10 ...
...Support part, 10a...Abutting surface, 13...Wedge.

Claims (1)

[Scope of Claims] 1. A support for a scaffolding, etc. has a cylindrical support main body with a brim-like flange member, and a side stay connected to the support has a substantially U-shaped connection portion fixed to the side. In a member connecting device in which the connecting portion fits over the flange member and connects by inserting a wedge across engagement holes provided in the flange member and the connecting portion, respectively, the cross section of the support column is A horizontal stay is arranged on a radial line passing through the center of the support, and an imaginary line passing through the center of the cross section of the support and parallel to the axis of the horizontal stay is defined as a reference line A. A support part is formed only on one side with the vicinity of the line A as a boundary, the wedge is provided at a position offset toward the support part from the reference line A, and the support part is formed in a cross section of the wedge and the pillar. A scaffold that contacts the outer peripheral surface of the support at at least two points across an imaginary line C connecting the center, and at least one of the contact points is provided on or near the reference line A. etc. component connecting device. 2. The device for connecting members such as a scaffold according to claim 1, wherein the tip of the support portion is formed into an abutment surface having the same shape as the outer peripheral surface of the support main body.