JP2548890B2 - 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 used for connecting a horizontal horizontal stay to a vertically-arranged pillar in a scaffold or the like temporarily installed during construction.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, as a device for connecting a pillar 1 and a lateral stay 2 of a scaffold, a flange member 3 is welded to a cylindrical pillar main body 1a, while a tubular stay main body is welded. A connecting portion 4 made of a metal plate bent into a substantially U-shape on the end face of 2a is abutted by the central plate portion 4a and welded, and the flange member 3 is inserted between the upper and lower plate portions 4b and 4c of the connecting portion 4. In some cases, the wedges 7 are fitted and inserted into the engaging holes 5 and 5 provided in the upper and lower plate portions 4b and 4c of the connecting portion 4 and the engaging holes 6 provided in the flange member 3 from above. Reference numeral 8 in the figure denotes a spacer arranged on the lower surface side of the upper plate portion 4b of the connecting portion 4.

However, in the above-mentioned conventional coupling device,
When the wedge 7 enters the engaging holes 5, 5, 6
Since the connection portion 4 and the connection portion 4 attract each other to strengthen the fixing force, the attraction causes the plate-shaped front end edges of the upper and lower plate portions 4b and 4c to strongly press against the side surface of the column main body 1a and bite into the side surface to cause a scratch or a depression. As a result, there is a problem that the strength and durability of the column main body 1a are deteriorated. Further, the stability of the connecting portion between the column 1 and the horizontal stay 2 depends on the contact area between the side surface of the column body 1a and the connecting portion 4 and the strength of the connecting portion 4 itself. Since the plate-shaped front end edges of the plate portions 4b and 4c serve as contact surfaces, naturally the column main body 1a
In addition to having a small contact area with respect to, the connecting portion 4 was merely U-shaped and had insufficient rigidity, and the stability of the connecting portion was poor, and rattling was likely to occur.

Further, in the above-mentioned conventional connecting device, the central plate portion 4a of the connecting portion 4 and the end surface of the tubular stay body 2a are welded and fixed to each other in an abutting state, and all the weight to be placed on the scaffold is concentrated on the welded portion. Therefore, there is a risk that the connecting portion 4 will often come off the stay body 2a and cause a fall accident due to poor welding or the like.

As a means for preventing the above-mentioned brace body 1a from being scratched or dented and improving the stability of the connecting portion,
It is conceivable to use a thick metal plate for the connecting portion 4 to increase the contact area, but in this case, there is a disadvantage that the weight of the entire horizontal stay 2 increases. Further, the substantially U-shaped connecting portion 4 is vertically long, that is, by increasing the vertical width of the central plate portion 4a to increase the distance between the upper and lower plate portions 4b and 4c, the upper and lower contact portions of the connecting portion 4 with respect to the side surface of the column main body 1a. It is conceivable to increase the distance between the contact portions to increase the rotation blocking force in the vertical plane of the horizontal stay 2 and thus improve the stability of the connecting portion, but this naturally increases the size of the connecting portion 4 and transports it. In addition to being bulky in storage and storage, the handleability will deteriorate.

[0006] In view of the above situation, the present invention does not reduce the strength and durability of the support pillars due to the connection of the horizontal stays, can obtain high stability of the connection portion, and further, the main body and the connection portion of the horizontal stays. It is an object of the present invention to provide a member connecting device for a scaffold or the like, which has a large fixing strength, is excellent in safety, and is structurally simple and can be easily and inexpensively manufactured.

[0007]

In order to achieve the above object, according to claim 1 of the present invention, in a pillar 10 of a scaffold or the like, a flange member 12 is fixed to a cylindrical pillar main body 11, and the pillar 10 is provided. A connecting portion 1 having a horizontal opening 14 into which the flange member 12 is fitted in a horizontal stay 13 connected to
5 is fixed to both ends, the connecting portion 15 is fitted over the flange member 12, and the engaging holes 16 and 17 provided in the flange member 12 and the connecting portion 15, respectively.
In the member connecting device that inserts and connects the wedges 18 across (FIG. 6), the connecting portion 15 sandwiches the horizontal opening 14 by bending one metal plate P (FIG. 8), and upper and lower front end walls 15a, 15b and left and right side walls 15c, 15d and upper and lower walls 15e, is closed to the rear end and 15f are formed in the opening opened <br/> box frame, the horizontal opening 14 of the box frame, box
Recessed portion 14 cut into both left and right side walls 15c and 15d of the frame
a and 14b, and one of the two recessed portions 14a is the other
The length of the stay body 20 of the lateral stay 20 is set longer than that of the stay body 20.
a is inserted and the connecting portion 15 and the stay main body 20 are welded at this inserted portion.

[0008]

[0009] Claim 2 of the present invention is one in which the vertical width of the box frame is a connecting portion 15 of the member connecting device of the first aspect is adopted a configuration is greater than the lateral width.

[0010]

According to claim 1, the horizontal opening 1 of the connecting portion 15 is formed.
When the flange member 12 of the column 10 is fitted into the column 4, and the wedge 18 is inserted over the flange member 12 and the engaging holes 16 and 17 of the connecting portion 15 to connect the column 10 and the lateral stay 13, the flange member 12 Due to the attraction of the connection portion 15 with the connection portion 15, the connection portion 15 comes into contact with the side surface of the column main body 1a over the entire vertical width of the front end walls 15a and 15b. Therefore, the rotational force in the vertical plane that acts on the lateral stay 1 from the outside is restricted by the vertically long contact portion, and the pressing force due to the attraction between the flange member 12 and the connection portion 15 is dispersed over a wide contact area. Therefore, the connecting portion 15 does not bite into the side surface of the column main body 11, and in addition to having a large contact area, the connecting portion 15 itself has a large rigidity because it forms a box frame, so that the connecting portion is stable. Is less likely to cause rattling. Further, the end portion 2 of the stay main body 20 of the horizontal stay 13 is provided in the rear end opening 19 of the connecting portion 15 forming the box frame.
Since 0a is fitted and welded at this fitting part,
The weight on the scaffold is supported by the entire fitting portion, and the connecting portion 15 and the stay body 20 do not come off from each other even if the welding portion is broken due to defective welding or the like.

[0011] According to claim 1, recesses 1 that cut in right and left side walls 15c, to 15d in the horizontal opening 14
Since one of 4a and 14b is longer than the other 14b, when the lateral stay 13 is attached to and detached from the support column 10, the flange member 12 is laterally inserted into and removed from the horizontal opening 14, and the inlet / outlet portion is long recessed portion 14a. The side wall 15c on the side of the short recessed portion 14b can be used as a positioning stopper for the flange member 12 at the time of the above-mentioned insertion, so that the rotational force on the horizontal stay 13 in the horizontal plane is engaged with the wedge 18. The holes 16 and 17 and the flange member 12 and the edge of the short recessed portion 14a of the connecting portion 15 are regulated by locking at two places, and at the side wall 15c side with a small notch, the connecting portion 15 serves as a box frame. The strength can be secured.

According to the second aspect, since the vertical width of the connecting portion 15 is large, the rotation preventing force in the vertical plane of the horizontal stay 13 in the connected state increases, and the rattling of the connecting portion is less likely to occur. Etc. stability is improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 10 is a support body in which a plurality of flange members 12 are welded and fixed to a support body 11 made of a metal circular pipe at predetermined intervals, and 13 is a tubular stay body 20 in which a box frame is connected to both ends. The portion 15 is a horizontal stay fixed by welding, and includes a large number of columns 10 that are vertically installed in advance at predetermined intervals, and a large number of horizontal stays 13 that are installed horizontally.
By connecting and via the wedges 18 ..., A structure such as a temporary scaffold having a required strength, structure and size can be assembled.

As shown in FIGS. 3 and 5, each flange member 12 of the column 10 is formed of a metal plate having a substantially square outer shape with each corner 12a being rounded and having a circular hole 21 at the center. The pillar main body 11 is inserted into the circular hole 21, and the periphery of this insertion portion is welded to fix the pillar main body 11 in a horizontal state. Then, the flange member 12 is provided with four substantially rectangular engaging holes 16 extending in the radial direction of the circular hole 21 by notches arranged radially from the circular hole 21 toward each corner 12a. , One side edge of each engaging hole 16 (both are side edges on the front side in the clockwise direction in FIG. 5)
A concave portion 16a is continuously provided on the outer peripheral portion of the outer peripheral portion, and an arcuate concave portion 22 is provided at an intermediate portion of each of the substantially square side portions 12b at the outer edge.
In this pillar 10, the flange member 12 does not roll when placed horizontally on the floor or the like because the flange member 12 has a substantially square shape, and the pillar body 11 of another pillar 10 is fitted in the arcuate recess 22 of the flange member 12. In addition, they can be stacked one above the other, and can be stably stacked when transported or stored by a vehicle.

As shown in FIG. 8, each connecting portion 15 of the horizontal stay 13 has projecting pieces a, a on one side and projecting pieces b, b and c, c on the other side, and a substantially slit-shaped opening at the center. A piece of metal plate P punched out in a shape having d is bent by 90 degrees in the same direction (one of mountain fold or valley fold in the figure) by bending, with the broken line in the figure as a bending line. , A, b, b and c, c are welded or opposed to each other to form a box frame having a vertical width larger than the horizontal width as shown in FIG. Then, this box frame has a horizontal opening 1
Upper and lower front end walls 15a and 15b sandwiching 4 and left and right side walls 1
5c and 15d and the butt-welded projection piece a,
Upper and lower walls 15e, 15f made of a, b, b and c, c
And the rear portions of the left and right side walls 15c and 15d bulge in an arc shape to form arc-shaped bulging side wall portions 15g and 15h by the side walls 15c and 15d, whereby the rear surface is completely opened and the arc-shaped rear end is formed. The opening 19 is formed, and the engaging hole 17 is formed by a T-shaped center line portion that is open on the front side of the upper surface, while the horizontal opening 14 is formed in the left and right side walls 15c and 15d.
The lower wall 15f having the recessed portions 14a and 14b that cuts more continuously is located closer to the rear portion and forms the wide opening portion 23 on the lower surface. Further, as shown in FIG. 7, the front walls 15a and 15b are formed by the pillar main body 1 that abuts against them.
1 is formed in an arcuate shape along the outer peripheral surface of the post 1, and at this time, the front wall portion 26 on the rear side of the insertion is inserted between the front wall portion 25 on the post body 11 and the front wall portion 26 on the rear side. It is preferable that the front protrusion amount is set to be larger than that of the front wall portion 25 on the insertion side, whereby the horizontal stay 1 is provided between the column main bodies 11, 11.
When the 3 is horizontally rotated and is straddle-fitted, the post-insertion-side front wall portion 26 abuts the strut bodies 11, 11 and the mounting position thereof can be determined almost automatically. Of course, it is also positioned by the recessed portion 14b.

Here, the horizontal opening portion 14 has a wide opening width between the upper and lower opening end walls, that is, the front wall portions 15a and 15b, and continues from the front surface side to the lower positions on both the left and right sides through the taper portions 24 and 24. As a result, the vertical width of the front surface is recessed 14
The length d ₁ of the right recess 14a is longer than the length d ₂ of the left recess 14b, and the maximum protrusion of the flange member 12 of the column 10 is set. Width, that is, the radial width d at the corner 12a
₃ (see FIG. 3), d ₁ > d ₃ > d ₂ is set. The lateral width of the engaging hole 17 is set to be substantially equal to the lateral width of the engaging hole 16 of the flange member 12.

As shown in FIGS. 2 to 6, the wedge 18 has a cross section in which the front-rear width on the upper side is wider than that on the lower side, and the left-right width is slightly smaller than the left-right width of the engagement holes 16 and 17. It is composed of a rectangular metal rod piece and has a retaining projection 18a protruding rearward at the upper end and a circular retaining projection 18 on the left side surface of the lower end.
b, an arcuate recess 18c is formed in the lower portion of the trailing edge. Therefore, when the wedge 18 is bent from the metal plate P to form the box frame of the connecting portion 15, the wedge 18 is fitted in advance to a position to be the engaging hole 17 of the connecting portion 15. As a result, it is held in the engagement hole 17 such that it cannot be pulled out and can move up and down.

The stay main body 20 of the lateral stay 13 is made of a metal round pipe, and each end 20a thereof is inserted into the arcuate rear end opening 19 of the connecting portion 15, and the connecting portion 1 is inserted at this inserting portion.
It is fixed to the left and right walls 15c and 15d of No. 5 by welding w. In addition, the connecting portions 1 at both ends of the lateral stay 13
5 and 15 are arranged such that the long recessed portions 14a of the horizontal opening 14 face opposite sides with respect to the axis of the stay body 20. Therefore, the same box frame can be used for the connecting portions 15 and 15 at both ends. As shown in FIG. 1, FIG. 2 or FIG. 6, locking tools 28 for locking the brace 27 shown in FIG. 1 are attached near both ends of the stay body 20.

In order to assemble a structure such as a temporary scaffold by the member connecting device having the above structure, first the horizontal stay 13 is held horizontally, and the wedges 18, 18 on both sides of the horizontal stay 13 are pulled out upward to form the respective retaining projections 18b. The engagement hole 17 is engaged and is in a state of falling backward. And this horizontal stay 1 held horizontally
3, a long recessed portion of the horizontal opening 14 of each connecting portion 15 between the flange members 12, 12 of the pair of columns 10, 10 vertically installed upright at a distance corresponding to the entire length of the horizontal stay 13. 14a is arranged so as to face each corresponding flange member 12, and its axis line is arranged so as to intersect with a straight line connecting both flange members 12, 12, and by turning in this horizontal state, both connecting portions 15, 15 are formed. Are fitted over the corners 12a of both flange members 12, 12 simultaneously or sequentially from the side of the recess 14a. In this straddling operation, the vertical width of the opening on the front side of the horizontal opening 14 is wide, and the tapered portions 24, 2 are formed on the upper and lower edges of the front portions of the recesses 14a, 14b on both sides.
Since it has 4, it can be easily performed.

Due to the above-mentioned straddling, the side portion 12b on the front side in the inserting direction of each flange member 12 and the edge of the short recessed portion 14b of the connecting portion 15, that is, the left side wall 15c abut (see FIG. 5). ), The horizontal stay 13 cannot be further swung, and the two 12, 15 are positioned so that the engagement holes 16, 17 are aligned on the vertical line. Then, in this positioning state, if each wedge 18 is raised and inserted into the engagement hole 16 and driven in, the connecting portion 15 is attracted to the side of the column 10, and the front surface thereof is strongly pressed against the side surface of the column body 11, Figure 3,
As shown in FIGS. 5 and 6, the columns 10, 10 and the lateral stay 13 are firmly connected. When inserting the wedge 18,
The retaining protrusion 18b provided at the lower end of the engaging hole 1
6 through the recess 16a.

In this connected state, the rotational force in the vertical plane that acts on the lateral stay 13 from the outside causes the upper and lower front end walls 15a and 15b of the vertically long connecting portion 15 to come into pressure contact with the side surface of the column main body 11 over the entire vertical length. The rotational force in the horizontal plane is restricted by the wedge 18, the engaging holes 16 and 17, and the side portion 12b of the flange member 12 and the edge of the short recessed portion 14b of the connecting portion 15 at two positions. It is regulated by contact, or is regulated by contacting the post-insertion side front wall portion 26 with the column main body 11, and the connecting portion 15 has a box-frame structure and high rigidity. Therefore, the connecting portion is rigidly held, and is in a very stable state without rattling. Further, in a temporary scaffolding or the like, an operator or various equipments ride on the plate passed on the horizontal stay 13 and their weights are always applied downward, but the end 20a of the stay main body 20 forms a box frame. Since the welding is performed while being inserted into the connecting portion 15 to be formed, even if the welding portion is broken due to poor welding or excessive load, the spacing between the columns 10 is made constant by the other horizontal stays 13. Stay body 2 because it is kept
0 and the connecting portion 15 do not come off from each other vertically, so that a fall accident or the like is avoided and it is extremely safe.

To remove the horizontal stay 13, the wedge 1 is used.
8 may be pulled out from the engaging hole 16 of the flange member 12, returned to the original pulled-back state, and the lateral stay 13 may be turned in the direction opposite to the mounting direction.
Easily separates from the flange member 12 of the column 10.

Although the stay main body 20 round pipe of the horizontal stay 13 is used in the above embodiment, a square pipe may be used. Further, as the flange member 12 of the column 10, various shapes other than the illustrated square such as a polygon, a circle, and an ellipse can be used. Further, the shape of the box frame of the connecting portion 15, the punching shape of the metal plate for manufacturing the box frame, the welding position, and the like can be variously modified in addition to those illustrated in FIGS. 7 and 8.

[0024]

According to the member connecting device of the first aspect,
When the flange member of the column is fitted into the horizontal opening of the connecting portion provided at the end portion of the horizontal stay, and the wedge is inserted over the flange member and the engaging hole of the connecting portion to connect the column and the horizontal stay. The box frame structure connecting part presses against the side surface of the column main body with a wide contact area of the entire vertical width of the upper and lower front end walls that sandwich the horizontal opening, and a strong fixing force that prevents rotation of the horizontal stay in the vertical plane is provided. Since the connecting portion has a box frame structure with high rigidity, the connecting portion has excellent strength and stability, and a scaffold or the like that hardly causes rattling can be constructed, and the connecting portion cuts into the side surface of the column main body. There is no risk of scratches or dents, the durability of the support is improved, and because the end of the tubular stay body is inserted and inserted in the connection part that forms the box frame, welding failure should occur. Even if the welded part is destroyed due to Without a body is out to up and down,
High security can be obtained.

Further, since the connecting portion forming the box frame is made of one bent metal plate, the material cost is low and the manufacturing is very easy, and even if the metal plate is thin, it has a structure. Since high rigidity can be obtained, the weight of the connecting portion can be lightened accordingly, and the overall weight of the lateral stay can be reduced. Further, by forming the metal plate in the shape of a horizontal frame as described above, since it has rigidity as a kind of reinforcing frame, the connecting portion can be made significantly smaller and compact.

[0026] According to the member connecting device according to claim 1, of the recesses which cut into the right and left side walls from the horizontal opening in the connecting part of the lateral stays, entrance from the side of the long recesses for the flange member of the column And the side wall on the side of the short recessed portion serves as a positioning stopper for the flange member at the time of fitting and insertion, when the horizontal stays are erected and connected between the pillars erected at regular intervals, the connecting portion is the flange member. It is possible to straddle sideways without difficulty, and since both striking holes of the connecting portion and the flange member can be automatically aligned by this straddling, the connecting operation becomes very easy, and on the side wall side with a small notch The strength of the connection part as a box frame can be ensured, and in addition, the connection part and the flange member are engaged at two positions: the engagement position of the wedge and the contact position on the side wall of the short recessed part side that serves as the stopper. Because it is a strong fixing force for preventing the rotation in the horizontal plane of the transverse stays is obtained, the connecting portion is rigidly held, there is an advantage that the stability of such scaffold is further improved.

According to the member connecting device of the second aspect, even if the entire connecting portion forming the box frame of the horizontal stay is small, the vertical contact width of the front wall portion with respect to the side surface of the column can be made long, and thus the connecting portion can be connected. There is an advantage that the size and weight of the connecting portion can be further reduced while sufficiently securing the stability of the portion.

[Brief description of drawings]

FIG. 1 is a front view of a scaffold to which a member connecting device according to an embodiment of the present invention is applied.

FIG. 2 is an enlarged view of a virtual circle II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 1;

FIG. 4 is a front view of a lateral stay in the embodiment.

5 is a cross-sectional arrow view taken along line IV-IV in FIG.

6 is a cross-sectional view taken along the line VI-VI of FIG.

FIG. 7 is a perspective view of a connecting portion of the horizontal stay in the embodiment.

FIG. 8 is a plan view of a metal plate used for manufacturing the connection portion.

FIG. 9 is a partially cutaway front view showing a conventional coupling device.

[Explanation of symbols]

 10 Strut 11 Strut body 12 Flange member 13 Horizontal stay 14 Horizontal opening 14a Long recessed portion 14b Short recessed portion 15 Connection portion 15a Upper front end wall 15b Lower front end wall 15c Left side wall 15d Right side wall 15e Upper wall 15f Lower wall 16 Joint hole 17 Engagement hole 18 Wedge 19 Rear end opening 20 Stay body 20a End P Metal plate

Claims (2)

(57) [Claims] 1. A pillar of a scaffolding or the like has a flange member fixed to a columnar pillar main body, and a horizontal stay connected to the pillar has a connecting portion having horizontal openings for fitting the flange member at both ends. In a member connecting device that is fixed, the connecting portion is fitted over the flange member, and a wedge is inserted and connected over the engagement holes provided in the flange member and the connecting portion, respectively, the connecting portion is Like bending the rear end have a a front wall and left and right side walls and upper and lower walls of the upper and lower sandwiching the horizontal opening opening opening of the metal plate
Formed in a released box frame, the horizontal opening of this box frame
Is a recessed part that cuts into the left and right side walls of the box frame that is the connection part.
In addition, one of both recessed parts is set longer than the other.
In addition, a member connecting device such as a scaffold in which an end portion of a stay body of a horizontal stay is fitted and inserted into an open rear end opening of the box frame, and a connecting portion and a stay body are welded at the fitting and inserting portion. 2. The member connecting device for a scaffold or the like according to claim 1 , wherein the vertical width of the box frame of the connecting portion is larger than the horizontal width.