JPH0719496U - Member connection device for scaffolding - Google Patents

Abstract

(57) [Abstract] [Purpose] As a member connecting device such as a scaffold that connects and connects horizontal stays between vertical columns, the columns laid horizontally during transportation and storage have good stability and low stacking state. it can. [Structure] A pillar 10 in which a flange member 12 is fixed to a cylindrical pillar main body 11, a horizontal stay 13 in which a connecting portion 15 having a horizontal opening 14 into which the flange member 12 is fitted is fixed in both ends, and the above-mentioned flange. The flange member 12 is formed into a substantially polygonal shape in a plan view, and is composed of a rod-shaped wedge 18 that is inserted over the engaging holes 16 and 17 of both the member 12 and the connecting portion 12 that is fitted over the member 12. A member connecting device such as a scaffold, in which the engaging hole 16 is provided in the polygonal corner portion 12a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a member connecting device used for connecting a horizontal lateral stay to a vertically-arranged pillar in a scaffold or the like temporarily installed during construction.

[0002]

[Prior art and its problems]

 Conventionally, as a device for connecting a scaffolding post 1 and a lateral stay 2 as shown in FIG. 8, a circular flange member 3 is welded to a circular tubular support body 1a while a tubular stay body 2a is substantially welded. The connecting portion 4 made of a metal plate bent into a U shape is abutted on 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 for connection. There is one in which a wedge 7 is inserted from above into the engaging holes 5 and 5 provided in the upper and lower plate portions 4b and 4c of the portion 4 and the engaging hole 6 provided in the flange member 3 to connect them. 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-described conventional coupling device, when the members 1 are transported or stored, when the stanchions 1 are laid on the floor or the like, they are easy to roll and are easily scattered in a stacked state, which is very poor in stability. In addition, there is a problem that it is bulky and takes up a large space, and the wedge 7 is easily pulled out from the connecting portion 4 during handling of the horizontal stay 2, which causes support for the connecting work and the wedges 7 and 7 at both ends are raised. Since the flange member 3 is inserted between the upper and lower plate portions 4b and 4c of the connection portion 4 while being held in the pulled-out state, there is a problem that complicated and difficult operations are required and workability is poor.

In view of the above situation, the present invention is a member connecting device for scaffolding and the like, and can be stably stacked in a low bulk with good stability of the struts laid down during transportation and storage, and also in a horizontal stay. It is an object of the present invention to provide a member connecting device such as a scaffold, which has no possibility of a wedge coming off during handling, has excellent workability of connecting operation, and has a stable connected state without rattling.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the member connecting device according to claim 1 of the present invention comprises a column 10 in which a flange member 12 is fixed to a column body 11 and a horizontal opening 14 into which the flange member 12 is fitted. A rod-shaped wedge 18 to be inserted over the engagement holes 16 and 17 of both the lateral member 13 having the connecting portions 15 having the ends fixed to both ends and the flange member 12 and the connecting portion 12 straddling the flange member 12. The flange member 12 is formed in a substantially polygonal shape in a plan view, and the engaging hole 16 is provided at a corner 12a of the polygonal shape.

Further, a second aspect of the present invention is the member connecting device according to the first aspect, wherein the flange portion 12 has a concave portion 20 in a straight outer peripheral portion forming a polygonal side portion 12b. It was done.

According to the third aspect of the present invention, the wedge 18 has a retaining projection 19 at the lower end thereof, and the engaging holes 16 of the flange member 12 are provided with a recess 16 a through which the retaining projection 19 passes. It adopts the structure that is formed.

[0008]

[Action]

 According to claim 1, since the flange member 12 of the strut 10 is substantially rectangular in a plan view, when the strut 10 is laid down on a floor or the like, the side portion 12a of the flange member 12 is grounded. It will not roll, and even if it is stacked, it will be difficult to collapse because the bottommost stage is stable. Moreover, since the engaging hole 16 provided in the flange member 12 is located at the corner 12a of the polygon described above, the vertical width and the horizontal width of the flange member 12 are small in the state where the flange member 12 is grounded sideways as described above. The bulk of the stacking is reduced by that much, and at the position of the engagement hole 16, a sufficient width of the wall portion can be taken in the radial direction of the column main body 11, so that the strength of the flange member 12 at the connecting portion can be sufficiently secured.

According to the second aspect, since the concave portion 20 is provided in the outer peripheral straight line portion forming the regular polygonal side portion 12b of the flange member 12, when the pillars 10 are stacked side by side, the pillars of the upper pillars are stacked. The pillar bodies 11 of 10 can be vertically stacked by fitting in the recesses 20 of the lower pillar 10, and the pillar bodies 11 of the pillars 10, 10 adjacent to each other in the right and left can be fitted in the recesses 20 of the flange members 12 of each other. As a result, the stacking conditions are extremely stable. As the polygon of the flange member 12, an even polygon having parallel opposite sides, particularly a regular quadrangle and a regular octagon is preferable.

Further, according to the third aspect, since the wedge 18 is held in the connecting portion 15 by the retaining projection 19 so as not to be able to be pulled out from the engaging hole 17, there is a risk that the wedge 18 is pulled out during handling of the lateral stay 13. In addition, the retaining projection 19 is tilted backward in the upward pull-out state in which it is locked in the engaging hole 17, and the horizontal stay 13 is held horizontally so that the flange member 12 is held in the horizontal opening 14 of the connecting portion 15. Can be inserted, and the wedge 18 can be inserted into the engagement hole 16 of the flange member 12 only by raising the wedge 18 after the insertion. Moreover, since the recess 16a for allowing the retaining projection 19 of the wedge 18 to pass through is provided at one side edge of the engagement hole 16 of the flange member 12, the left and right widths of the engagement hole 16 and the wedge 18 are set to be substantially equal. Also, the wedge 18 can be inserted into the engagement hole 16 without supporting it, so that the gap in the left and right directions at the engaging portions of the both 16 and 18 is minimized to prevent the horizontal stay 13 from rotating in the horizontal plane. A strong connected state without rattling can be realized.

[0011]

【Example】

 In FIG. 1, 10 is a pillar in which a plurality of flange members 12 are welded and fixed to a pillar main body 11 made of a metal circular tube at required intervals, and 13 is a tubular stay main body 21 to which a connecting portion 15 forming a box frame is welded. The horizontal stays are fixed, and a large number of vertical columns 10 ... Standing vertically at predetermined intervals are connected to a large number of horizontal stays 13 ... As a result, it can be assembled into a structure such as a temporary scaffold that has the required strength, structure, and size.

As shown in FIGS. 3 and 5, each of the flange members 12 of the support column 10 is made of a metal plate having a substantially square outer shape with each corner 12 a being rounded and having a circular hole 22 in the center. The pillar main body 11 is inserted into the circular hole 22 and the periphery of the insertion portion is welded to fix the pillar main body 11 in a horizontal state. The flange member 12 is provided with four substantially rectangular engaging holes 16 which are long in the radial direction of the circular hole 22 due to the notches radially arranged from the circular hole 22 toward the corners 12a. A concave portion 16a is connected to one side edge of each engagement hole 16 (each side edge on the front side in the clockwise direction in FIG. 3), and the strut main body 10 is provided at the middle portion of each substantially square side portion 12b at the outer edge. It is provided with an arcuate recess 20 having the same diameter as the outer circle.

Each connecting portion 15 of the horizontal stay 13 has a vertical width larger than the horizontal width as shown in FIG. 4 by bending a single metal plate punched into a predetermined shape and welding it at the abutting portion. It is formed in a box frame. As shown in FIGS. 2 to 6, the box frame includes upper and lower front end walls 15a and 15b sandwiching the horizontal opening 14, left and right side walls 15c and 15d, and upper and lower walls formed by the butt-welded portions. 15e and 15f, and the rear portions of the left and right side walls 15c and 15d bulge in an arc shape to form arcuate bulging side wall portions 15g and 15h by the side walls 15c and 15d, whereby the rear surface is completely opened and a circle is formed. The arc-shaped rear end opening 23 is formed, and the engaging hole 17 is formed by the T-shaped center line portion that is open on the front side of the upper surface, while the left and right side walls 15c and 15d are continuously cut from the horizontal opening portion 14. The lower wall 15f having the recessed portions 14a and 14b and having a small front and rear width is located closer to the rear portion, and the lower surface is wide open. Thus, the horizontal opening 14 has a wide opening width between the upper and lower open end walls, that is, the front wall portions 15a and 15b, and continues from the front side to the lower side on both the left and right sides through the taper portion. The upper and lower widths of the recesses 14a and 14b are set to be larger than that of the recesses 14a and 14b, and the maximum protrusion width of the flange member 12 of the support column 10, that is, the radial width of the corner 12a is larger than that of the recess 14a on the right side. The horizontal length is long and the horizontal length of the left recess 14b is set short. 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 wedge shape in which the front-rear width on the upper side is wider than that on the lower side, and the left-right width is a gap required for sliding than the left-right width of the engagement holes 16 and 17. It is composed of a metal rod piece having a rectangular cross section, which is slightly larger than the above, and has a retainer protrusion 24 protruding rearward at the upper end, and a circular retainer protrusion 19 on the left side surface of the lower end, and An arcuate recess 25 is formed on the rear side edge 18a facing the center side of the horizontal stay. When the wedge 18 is bent from the metal plate to form the box frame of the connecting portion 15, the wedge 18 is fitted in advance to a position which will be the engaging hole 17 of the connecting portion 15. The retaining projection 24, the retaining projection 19, and the engaging hole 17 are engaged with the connecting portion 15 so that the retaining projection 24 cannot be pulled out and is vertically movable.

The stay main body 21 of the horizontal stay 13 is made of a round metal pipe, and each end 21 a thereof is inserted into the rear end opening 23 of the connecting portion 15, and the left and right sides of the connecting portion 15 are inserted at the inserting portions. It is fixed to the walls 15c and 15d by welding w. The connecting portions 15 and 15 at both ends of the horizontal stay 13 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 21. Therefore, the same box frame can be used for the connecting portions 15 and 15 at both ends.

In order to assemble a structure such as a temporary scaffold by the connecting device having the above-described structure, first, the lateral stay 13 is held horizontally, and the wedges 18, 18 on both sides thereof are pulled out upward and tilted rearward. The horizontal stay 13 held horizontally by the horizontal stay 13 is provided between the flange members 12 of the pair of columns 10 vertically installed in advance at a distance corresponding to the entire length of the horizontal stay 13, and the horizontal connection of each connecting portion 15 is made. The long recessed portion 14a of the opening 14 faces each corresponding flange member 12, and the axis of the long recessed portion 14a is arranged so as to intersect with the straight line connecting the flange members 12 and 12 and swivel in this horizontal state. Thus, the connecting portions 15 and 15 are fitted over the corner portions 12a of the flange members 12 and 12 simultaneously or sequentially from the concave portion 14a side. At this time, since the wedge 18 is in the pulled-out state, it does not interfere with the flange member 12.

As a result of the above-mentioned straddle, the side portion 12b on the front side in the insertion direction of each flange member 12 and the end edge of the short recessed portion 14b of the connecting portion 15, that is, the left side wall 15c, come into contact with each other, and the side stays are formed. Further turning of 13 is impossible, and both 12 and 15 are positioned so that the engaging holes 16 and 17 are aligned on the vertical line. When each wedge 18 is raised in this positioning state and inserted into the engagement hole 16 and driven in, the connecting portion 15 is attracted to the side of the column 10 and its front surface strongly presses against the side surface of the column main body 11. 2, the columns 10, 10 and the lateral stay 13 are firmly connected to each other as shown in FIGS. 3, 3, 5 and 6. When the wedge 18 is inserted, the retaining projection 18b provided at the lower end of the wedge 18 passes through the recess 16a of the engaging hole 16.

In this connected state, the rotational force in the vertical plane that acts on the horizontal stay 13 from the outside causes the upper and lower front end walls 15a and 15b of the vertically long connecting portion 15 to move to the side surface of the column main body 11 over the entire vertical length. It is pressed and regulated. Further, the rotational force in the horizontal plane is such that the wedge 18 and the engaging holes 16 and 17 are substantially in contact with each other in the left-right direction as well, and the contact at this engaging portion and the side portion 12b of the flange member 12 and the connecting portion 15 are performed. Is abutted with the edge of the short recessed portion 14b, and is abutted at two places. In particular, in this embodiment, since the connecting portion 15 has a box-frame structure and has a large rigidity, the connecting portion is held rigidly and is in a very stable state without rattling.

In a temporary scaffold or the like, an operator or various equipment is placed on the plate passed on the horizontal stay 13, and the weight of the operator and various equipment is always downward. However, in the present embodiment, the stay main body is used. Since the end portion 21a of the welded portion 21 is welded in a state of being inserted into the connection portion 15 forming the box frame, even if the weld portion is broken due to poor welding or excessive load, the other horizontal stays 13 Since the space between the columns 10 is kept constant by this, the stay main body 20 and the connecting portion 15 do not come apart from each other in the vertical direction, so that a fall accident or the like is avoided and it is extremely safe.

To remove the horizontal stay 13, the wedge 18 may be pulled out from the engagement hole 16 of the flange 12 and returned to the original pulled-out state, and the horizontal stay 13 may be rotated in the direction opposite to the mounting direction. As a result, the connecting portion 15 is easily separated from the flange member 12 of the column 10.

Therefore, when the pillar 10 is carried by a vehicle or stored in a warehouse or a material storage area of a construction site, the laid pillar 10 is grounded at the side portion 12b of the flange member 112 having a square shape. As shown in FIG. 7, the pillar main body 11 of the pillar 10 of the upper pillar does not roll and fits into the recess 20 of the lower pillar 10 at the time of stacking. In this state, the columns 10 adjacent to each other on the left and right sides fit into the recesses 20 of the flange member 12 of the columns 11 so that the columns 10 are very stable and difficult to collapse and the overall bulk is low.

In the present invention, the outer shape of the flange member 12 of the column 10 may be a substantially regular octagon, and the recess 20 provided on the side portion 12b can be set to various shapes other than the illustrated arc shape. . Further, in the present invention, the detailed structure such as the structure of the connecting portion 15, the shape of the horizontal opening portion 14, the cross-sectional shape of the stay main body 21, the connecting structure of the connecting portion 15 and the stay main body 21 can be variously changed in design other than the embodiment. Is.

[0023]

[Effect of device]

 According to the connection device for scaffolding or the like according to claim 1, since the flange member of the support pillar is substantially polygonal in a plan view, it does not roll even when the support pillar is placed sideways, and the bulkiness is low in transportation and storage. The flange members can be stacked in a stable state that is hard to collapse, and since the engaging holes provided in the flange member are located at the corners of the above polygon, the vertical width and horizontal width of the flange member can be It is small, and the stacking volume is low, and at the position of the engaging hole, a sufficient width of the wall can be taken in the radial direction of the strut body, so the strength of the flange member side at the joint between the strut and the horizontal stay is sufficient. Can be secured.

According to the connection device for scaffolding or the like according to claim 2, in transporting or storing the support, the support main body of the upper support can be fitted and stacked in the recess of the flange member of the horizontal support. There is an advantage that it is possible to make a very stable stacking state in which there is no risk of misalignment.

According to the third aspect, there is no fear that the wedge will be irremovably held in the connecting portion of the horizontal stay and will fall out, and when the horizontal stay is held horizontally and is connected to the column, the wedge is retained. The flange member can be inserted into the horizontal opening of the connecting part as it is in the state of being pulled back in advance, and the wedge member can be inserted into the engaging hole of the flange member only by raising the wedge after the insertion, and by the reverse procedure. Since the connection part and the flange member can be separated, the connecting and disconnecting operations are extremely easy, and in addition, there is a recess at one side edge of the engagement hole of the flange member for allowing the retaining projection of the wedge to pass through. The gap between the holes and the wedges in the engagement direction in the left-right direction can be minimized to realize a solid connection state without rattling.

[Brief description of drawings]

FIG. 1 is a front view of a scaffold to which a 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 cross-sectional view taken along the line III-III of FIG.

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

5 is a cross-sectional view taken along the line VV of FIG.

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

FIG. 7 is a vertical sectional front view showing a stacked state of columns in the embodiment.

FIG. 8 is a partially cutaway front view showing a conventional coupling device.

[Explanation of symbols]

10 Struts 11 Strut body 12 Flange members 12a Corners 12b Sides 13 Horizontal stays 14 Horizontal openings 15 Connections 16 Engagement holes 16a Recesses 17 Engagement holes 18 Wedges 19 Retaining protrusions 20 Arc-shaped recesses (outer peripheral straight line of flange members Recessed part)

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[Procedure amendment]

[Submission date] April 18, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (3)

[Scope of utility model registration request] 1. A support pillar having a flange member fixed to a circular tubular support body, a lateral stay having connection portions having horizontal openings into which the flange member is fitted fixed at both ends, the flange member and straddling it. It consists of a rod-shaped wedge that is inserted over both engagement holes of the fitted connecting portion, and the flange member is formed in a substantially polygonal shape in plan view,
A member connecting device such as a scaffold, in which the engaging holes are provided at the corners of the polygon. 2. The member connecting device for a scaffold or the like according to claim 1, wherein the flange member has a concave portion in a straight outer peripheral portion forming a polygonal side portion. 3. A member for scaffolding or the like according to claim 1, wherein the wedge has a retaining projection at the lower end thereof, and a recess for allowing the retaining projection to pass through is provided in each engagement hole of the flange member. Coupling device.