JP6749600B2 - Leading handrail - Google Patents

Description

TECHNICAL FIELD The present invention relates to a handrail on a temporary scaffold installed on a construction site, and more particularly to a preceding handrail provided with braces for reinforcing the scaffold at both ends of a horizontal member.

Conventionally, at a construction site, etc., when constructing a temporary scaffold for work by assembling a pillar made of pipe material etc. into a frame shape, it is necessary to construct a scaffold so as to withstand the load from the lateral direction or the diagonal direction. In some cases, a slide is provided.

As the preceding handrail, as shown in each of Patent Documents 1 to 5 shown below, a connecting member that is connected to the connection receiving portion of the column is provided at the tip in the vicinity of the connecting portion where the horizontal member and the brace are connected. Furthermore, a brace is provided rotatably with the connecting members on both ends of the horizontal member. The connection member includes an insertion portion that is inserted into an insertion hole provided in the connection receiving portion of the column, and a connection portion that connects the insertion portion, the horizontal member, and the braces.

The preceding handrail is provided at both ends of the horizontal member after inserting the inserting portion of the connecting member into the insertion hole of the connecting receiving portion from above and connecting the horizontal member between the connecting receiving portions of the adjacent columns. It is attached by fixing the tip of the braces to another connection receiving part. Therefore, the angle formed by the insertion portion of the connecting member and the horizontal member is about 90 degrees when the pillar is attached.

By the way, the connecting members have various configurations, and the connecting structure between the horizontal member and the connecting members also has a configuration unique to the preceding handrail. These are roughly classified into those in which the horizontal member and the insertion portion are fixed and those in which the horizontal member is provided so as to be rotatable with respect to the insertion portion.

As the former, for example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2012-197609), Patent Document 2 (Japanese Unexamined Patent Publication No. 2012-97596), and Patent Document 3 (Japanese Unexamined Patent Publication No. 2015-68032) are referred to as horizontal members. Patent Document 4 (Japanese Unexamined Patent Application Publication No. 2014-80799) can be exemplified as an example of the latter in which the insertion portion is fixed and the horizontal member and the insertion portion are configured to be rotatable. Further, Patent Document 5 (Japanese Patent Laid-Open No. 2013-64321) has a different structure on both ends of the horizontal member, and has a structure in which one is fixed and the other is rotatable.

JP, 2012-197609, A JP 2012-97596 A JP, 2005-68032, A JP, 2014-80799, A JP, 2013-64321, A

However, the preceding handrails having these various configurations have a problem that the mounting work is complicated and time-consuming as shown below. For example, in the structure shown in Patent Documents 1 to 3 in which the horizontal member and the insertion portion are fixed, the horizontal member is maintained in the horizontal position which is the posture at the time of attachment, and then the connection is provided to the two columns. It was necessary to attach the horizontal members by simultaneously inserting the insertion portions on both ends into the receiving portion. For this reason, in the erection scaffold assembled in order from the bottom side, it is difficult to keep the horizontal member horizontal from the bottom side and to insert the insertion parts at both ends into the insertion holes of the connection receiving parts at high positions. There was a problem that the installation work was complicated.

Further, in the structure shown in Patent Document 4 in which the insertion portion and the horizontal member are rotatable, the insertion portions located at both ends of the horizontal member are arranged in the vertical direction so that the connection receiving portion insertion hole is formed. Since the work of inserting the horizontal member can be independently performed on both end sides, there is an effect that the work of attaching the horizontal member from the lower side is easy. However, in this configuration, since the horizontal member and the diagonal member are supported by the same pivot shaft, it is difficult to maintain the posture in which the insertion portion is oriented in the vertical direction, and there is a problem that the insertion work is complicated. there were. In particular, it was difficult to maintain the insertion part in a vertical posture in the work of inserting the insertion part by lifting the other end side to a high position with one of the horizontal members inserted in the connection receiving part. ..

Further, in the prior handrail shown in Patent Document 5, the movable insertion part is first fixed to the support, and then the fixed insertion part is inserted into the support connection receiving part, so that the attitude of the insertion part is maintained. The problem goes away. However, since it is necessary to perform the mounting work from the determined insertion portion, it is necessary to confirm the directions of the left and right preceding handrails in advance, which is troublesome.

Therefore, the technical problem to be solved by the present invention is to provide a leading handrail which can facilitate the attaching work especially to the connection receiving portion at a high position of the column.

In order to solve the above technical problems, the present invention provides a preceding handrail having the following configuration.

According to the first aspect of the present invention, a horizontal member extending in a substantially horizontal direction, which has connection receiving portions provided at predetermined intervals along the axial direction and is erected between columns that are erected at predetermined intervals. And a diagonal member extending in an oblique direction is a preceding handrail connected via a connecting member having an insertion portion that is inserted into the connection receiving portion from above,
The connecting member is
A horizontal member mounting portion that is provided at a position above the insertion portion and that is pivotally attached to the vicinity of both ends of the horizontal member,
A diagonal member mounting portion that is provided in the lower position of the horizontal member mounting portion in the vicinity of the insertion portion and pivotally mounts the diagonal member rotatably;
A leading handrail is provided, wherein a leading end side of a connecting shaft with the horizontal member is configured to be capable of contacting the upper edge of the insertion portion.

According to a second aspect of the present invention, in the connecting member, the insertion portion, the horizontal member mounting portion and the diagonal member mounting portion are integrally configured, the leading handrail of the first aspect, provide.

According to a third aspect of the present invention, the horizontal member mounting portion is configured by a connecting piece provided above the insertion portion so as to sandwich the horizontal member from the left and right. A leading handrail of the first or second aspect is provided.

According to a fourth aspect of the present invention, the horizontal member mounting portion is pivotally attached to the horizontal member at a position projecting inward from an inner edge of the diagonal member mounting portion. Providing a leading handrail according to any one of the third aspects.

According to the present invention, since the connecting member rotatably connects the two members installed between the columns, that is, the horizontal member and the diagonal member, the horizontal member and the diagonal member connecting shaft and two The direction of the connecting member can be uniformly determined by the member. That is, the first coupling member inserted into the coupling receiving portion is overlapped and supported so that the longitudinal direction of the diagonal member is aligned with that of the horizontal member coupled to the coupling member. Also, it is possible to secure three fulcrums between the connecting shafts of the horizontal member attaching portion and the diagonal member attaching portion, and it is possible to maintain the direction of the insertion portion provided in the connecting member in a substantially vertical direction.

On the other hand, with regard to the other connection receiving part, since the horizontal member is connected to the support column, the other diagonal member is used to insert it into the connection receiving part at a higher position. Since it is configured to come into contact with the upper edge of the above, it is regulated with respect to the insertion portion and the horizontal member, and is approximately 90 degrees. Therefore, even if the other diagonal member is used to support the connecting member from the lower side, the angle of the insertion portion can be maintained constant, and the connecting operation to the column can be facilitated.

It is a front view showing the composition of the preceding handrail concerning the embodiment of the present invention. FIG. 3 is an exploded perspective view showing a configuration of a connecting member of the preceding handrail of FIG. 1. Is. It is a perspective view which shows the attachment state to the support|pillar of the connection member of the preceding handrail of FIG. It is a perspective view which shows the attachment state to the support|pillar of the diagonal member attachment member of the preceding handrail of FIG. It is a figure which shows the process of the installation work of the preceding handrail of FIG. Is. FIG. 6 is an enlarged view of a portion in the vicinity of the first connecting member of the preceding handrail in the state of FIG. 5. It is a figure which shows the process of the installation work of the preceding handrail of FIG. 1, and has shown the state following FIG. FIG. 8 is an enlarged view of a portion in the vicinity of the first connecting member of the preceding handrail in the state of FIG. 7. It is a figure which shows the process of the installation work of the preceding handrail of FIG. 1, and has shown the state following FIG. It is a figure which shows the process of the installation work of the preceding handrail of FIG. 1, and has shown the state following FIG. It is a figure which shows the process of the installation work of the preceding handrail of FIG. 1, and has shown the state following FIG.

Hereinafter, a preceding handrail according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing a configuration of a preceding handrail according to an embodiment of the present invention. The preceding handrail 1 according to the present embodiment is used by being attached to a temporary scaffold 80 as shown in FIG.

The temporary scaffold 80 includes a plurality of pillars 81 arranged in a grid pattern on the ground and erected so as to extend in the vertical direction. The pillars 81 are arranged in a grid pattern in the horizontal (horizontal) direction at predetermined intervals. Each strut 81 has a predetermined length by axially adding a plurality of strut constituent members 82 made of pipes having a circular cross section. A flange-shaped plate member provided with a connection hole is provided on the outer peripheral portion of each strut forming member 82 to form a connection receiving portion 83. Of these connection receiving portions 83, all of the column constituent members 82 are provided at the same position, and the connection receiving portions 83 of the opposing columns are formed at the same height. In addition, in the connection receiving portions 83, the gap between the upper end set of the lower strut forming member 82 and the lower end set of the upper strut forming member 82 is also set in a state where the plurality of strut forming members 82 are connected by replenishment. , Are arranged to have the same interval.

Further, in the scaffold, columns 81 adjacent to each other in the front-rear direction are connected by a connecting pipe (not shown) extending in the horizontal direction. This connecting pipe is configured by a pipe similar to the support column 81, and wedge-shaped connecting portions (not shown) provided at both ends are connected to the opposing connection receiving portions 83 of the supporting column 81. A tread 84 is installed on the two connecting pipes continuous in the left-right direction. The tread is provided with hooks that engage with the connecting pipes at both ends in the left-right direction, and is erected by engaging the hooks with adjacent connecting pipes.

As shown in FIG. 1, a leading handrail 1 according to an embodiment of the present invention includes a horizontal member 2 arranged to extend in a horizontal direction, and a pair of first first members arranged at both ends of the horizontal member 2. A connecting member 3, two diagonal members 4 forming a brace arranged on each first connecting member 3, and a second connecting member 5 arranged on a free end of each diagonal member 4. ing.

The horizontal member 2 plays a role as a handrail in the erected state, and is made of a pipe material having a length corresponding to the interval between the columns 81 having a diameter smaller than that of the columns. In addition, the horizontal member 2 may be configured so that the entire length thereof can be changed by, for example, a method of connecting pipe materials having different diameters in a nested manner. Along with this, the entire length of the diagonal member 4 may be changed.

The first connecting member 3 corresponds to an example of the connecting member of the present invention, and is inserted into the connection receiving portion 83 of the support column 81 from above to be connected to the support column, and is connected to both ends of the horizontal member 2. It is movably arranged. As shown in FIG. 2, the first connecting member 3 includes a pair of symmetrical side plate portions 6a and 6b and a connecting plate portion 7 that connects upper end portions of the side plate portions 6a and 6b to each other. It is formed by punching and bending.

The side plate portions 6a and 6b of the first connecting member 3 can be functionally roughly divided into an inserting portion 8, a horizontal member attaching portion 9, and a diagonal member attaching portion 10. The side plates 6a and 6b, except for the horizontal member mounting portion 9, have a substantially rectangular outer edge and a substantially U-shape with a notch 8b opening to the lower edge.

The insertion portion 8 is inserted into the insertion hole 86 of the connection receiving portion 83 of the support column 81, and corresponds to both lower regions on one end side. As shown in FIGS. 2 and 3, the insertion portion 8 is formed in a wedge shape so that the tip thereof becomes thin, and is inserted into the insertion hole 83a of the connection receiving portion 83 to connect the first connection member 3 to the connection receiving portion. The shape is fixed to the portion 83. Therefore, the width 8B of the notch 8b (see FIG. 6) between the insertion portion 8 and the diagonal member mounting portion 10 is substantially the same as the width of the insertion portion peripheral edge 83b of the connection receiving portion 83, and the notch 8b The first connecting member 3 is fixed to the connection receiving portion 83 by the inserting portion 8 and the diagonal member attaching portion 10 that sandwich the pin.

The horizontal member attaching portion 9 is a protruding portion that is present at an upper position of the side plate portions 6a and 6b so that the horizontal member 2 can be sandwiched from the outside and that protrudes so as to spread to the outside. The horizontal member mounting portion 9 is provided with a horizontal member mounting hole 9a corresponding to the through hole 2a provided near the end of the horizontal member 2. The horizontal member 2 is arranged between the horizontal member mounting portions 9, and the horizontal member mounting hole 9a and the through hole 2a are rotatably arranged with screws 100 or the like.

The horizontal member mounting hole 9a of the horizontal member mounting portion 9 is provided at a position that protrudes inward from the inner edge 3a of the side plate portions 6a and 6b by a distance corresponding to the radial dimension of the horizontal member 2. With this, a wide rotatable range of the horizontal member 2 can be secured, and for example, the horizontal member 2 can be rotated to a position in the direction along the inner edge 3a.

Further, the through hole 2a of the horizontal member 2 is provided at a position slightly on the center side from the end of the horizontal member 2. The length dimension of the tip portion 2b located closer to the end portion than the through hole 2a is not particularly limited, but may be about several cm. As shown in FIG. 3, the tip end portion 2 b located on the end portion side of the through hole 2 a is housed in the horizontal member attachment portion 9 when attached to the first connecting member 3. As a result, when the horizontal member 2 is in a substantially horizontal position, the distal end portion 2b comes into contact with the upper end side of the insertion portion 8, the rotation range of the horizontal member 2 is limited, and the horizontal member 2 is inserted. The part 8 and the part 8 are prevented from expanding beyond a predetermined angle.

The diagonal member mounting portion 10 is provided so as to face the insertion portion 8 with the notch 8b interposed therebetween, and the diagonal member mounting hole 10a is provided in the lower region. The diagonal member mounting hole 10a is provided below the horizontal member mounting hole 9a and close to the insertion portion. The diagonal member mounting portion 10 is rotatably arranged with a screw 101 or the like so as to sandwich the tip of the diagonal member 4.

As shown in FIGS. 2 and 3, the diagonal member 4 is a pipe having an outer diameter that can be arranged between the side plate portions 6a and 6b of the first connecting member 3. The diagonal member 4 can be connected to the connection receiving portion 83 below the connection receiving portion 83 of the support column 81 to which the second connecting member 5 is connected, with the upper end rotatably connected to the first connecting member 3. It is formed with a length dimension that allows it. The upper end (one end) of the diagonal member 4 is flatly pressed, and a through hole 4a for rotatably arranging the first connecting member 3 is provided so as to penetrate in the radial direction. Since the upper end of the diagonal member 4 is configured to be flat, the diagonal member 4 has some play in the lateral direction with respect to the first connecting member 3, and the diagonal member 4 does not fit into the diagonal member mounting hole 10a. The lower end side of can be moved to the left and right.

Further, as shown in FIG. 1, the diagonal member 4 is provided with a flat portion 4b having a vertically elongated cross-sectional elliptical shape with a reduced dimension in the width direction at substantially the center where they intersect each other in the erected state. Further, a through hole is provided at the lower end which is the free end of the diagonal member 4, and the second connecting member 5 is rotatably attached. The second connecting member 5 and the diagonal member 4 may be fixed by means such as welding.

The second connecting member 5 is for connecting the end portion of the diagonal member 4 to the connection receiving portion 83 of the column 81, and the fitting portion 11 that fits into the connection receiving portion 83 and the insertion hole of the connection receiving portion 83. And a wedge member 12 to be inserted into 83a. The second connecting members 5 attached to the two diagonal members are the same and are fixed to the diagonal member 4 in the inverted state.

The fitting portion 11 includes an outer plate 13 formed by punching a metal plate and performing a bending process, and a wedge support member 14 that is disposed inside the outer plate 13 and that mounts the wedge member 12. The outer side plate 13 is a U-shaped member having a notch 15 that can be inserted into the connection receiving portion 83 from the side. A diagonal member mounting hole 13a for connecting to the diagonal member 4 is provided in a lateral portion of the outer plate 13, and the diagonal member 4 is rotatably attached to the diagonal member 4. Both may be fixed as described above.

The wedge support member 14 is a member for supporting the wedge member so that the wedge member does not fall off from the outer plate 13, and is attached to the outer plate 13 so as to sandwich both sides of the wedge member 12, thereby supporting the wedge member 12. To do.

The wedge member 12 is made of a metal plate having a substantially triangular shape, and its thickness is smaller than that of the wedge fixing portion 14. The wedge member 12 is provided with a retaining portion 12a. The lower end where the retaining portion 12a is formed is configured to be wider than the width of the wedge supporting member 14 and narrower than the width of the insertion hole 83a of the coupling receiving portion 83.

The fitting portion 11 arranges the notch 15 of the outer plate 13 on the side of the coupling receiving portion 83, and accommodates the coupling receiving portion 83 in the notch 15 from the side. The wedge member 12 is inserted into the insertion hole 83a of the connection receiving portion 83 arranged in the notch 15, and fixes the second connection member 5 to the support column.

The preceding handrail 1 configured in this manner is preferably used as a preceding handrail when constructing the upper second layer or higher after constructing the first layer of the scaffold. Next, the erection work when the preceding handrail 1 is used as the preceding handrail will be described. In addition, in the following drawings, the first connecting member 3, the diagonal member 4, and the second connecting member 3 and the diagonal member 4 which are provided at both ends of the horizontal member 2 are separated in order to distinguish the right and left. The member 5 may be given a branch number of A or B.

First, as shown in FIG. 5 and FIG. 6, the preceding handrail 1 before being installed has the horizontal member 2 with respect to the first connecting member 3A so that the pair of diagonal members 4A extend in parallel with the horizontal member 2. Is rotated 90 degrees to superimpose the horizontal member 2 on the diagonal member 4A. Since the first connecting member 3 and the like attached to both ends of the horizontal member 2 have the same structure on both sides, either of the first connecting members 3 of the horizontal member 2 may be fixed to the column 81 first. , No need to sort left and right.

As described above, since the horizontal member mounting hole 9a of the horizontal member 2 of the first connecting member 3 is provided at the position projecting inward from the inner edge 4a of the side plate portions 6a and 6b, the rotatable range is reduced. It can be secured widely, and can be rotated until the horizontal member 2 becomes substantially parallel to the insertion portion 8. Further, since the diagonal member mounting hole 10a is provided below the horizontal member mounting hole 9a and close to the insertion portion, when the horizontal member 2 and the diagonal member 4 are gripped so as to be bundled, the diagonal member mounting hole 10a is mounted. The hole 10a, the horizontal member mounting hole 9a, and the distance between the intersecting positions of the horizontal member 2 and the diagonal member 4 are uniformly determined, and the orientation of the first connecting member 3, specifically, the first connecting member with respect to the horizontal member 2 is determined. The angle with 3 is fixed. Therefore, when inserting the inserting portion 8 of the first connecting member 3A on the side to be fixed to the column into the connecting receiving portion 83, the orientation of the first connecting member 3A is fixed, and there is no rattling of the inserting portion 8. The insertion operation can be facilitated.

In this state, as shown in the figure, the insertion portion 8 of the first connection member 3A is inserted into and connected to the connection receiving portion 83 from above.

Then, as shown in FIG. 7, the other end of the horizontal member 2 is rotated upward about the horizontal member attachment hole 9a of the first connecting member 3A fixed to the connection receiving portion 83. At this time, the other end of the horizontal member 2 is operated upward by using the diagonal member 4B connected to the first connecting member 3B on the non-fixed side.

At this time, since the horizontal member 2 is lifted upward by using the diagonal member 4B, the first connecting member 3B rotates in the direction in which the angle between the insertion portion 8 and the horizontal member increases. At this time, in the present embodiment, as shown in FIG. 8, the tip portion 2b of the horizontal member 2 abuts on the upper end side of the insertion portion 8, so that the insertion portion of the first connecting member 3B is inserted into the horizontal member 2. 8 is maintained in an orthogonal position. Therefore, when inserting the first connecting member 3B, there is no problem that the first connecting member 3B is unstable and its orientation cannot be determined.

Further, as shown in FIG. 9, in order to insert the first connecting member 3B into the connecting receiving portion 83, it is necessary to position the first connecting member 3B above the connecting receiving portion 83. The first connecting member 3B and the horizontal member 2 form an angle smaller than 90 degrees. However, even in this case, since it is included in the rotation range of the horizontal member 2 with respect to the first connecting member 3B, the first connecting member 3B of the connection receiving portion 83 can be arranged as shown in FIG.

After that, the diagonal member 4B disposed on the first connecting member 3B is gripped, and the first connecting member 3B is positioned above the connection receiving portion 83 of the adjacent column 81 as shown in FIG. The inserting portion 8 of the connecting member 3B is inserted into the connecting receiving portion 83 from above and connected.

At this time, in the present embodiment, the insertion portion 8 can be maintained in a state of being orthogonal to the horizontal member 2, and the insertion portion 8 can be easily positioned and inserted into the connection receiving portion 83. You can

In this way, as shown in FIG. 10, when the pair of first connecting members 3A, 3B are connected to the connection receiving portions 83 of the adjacent columns 81, the diagonal members 4A, 4B are then connected as shown in FIG. The column 81 on the opposite side is rotated toward the connection receiving portion 83 located below the connection receiving portion 83 to which the first connecting member 3 is connected. Then, with the wedge member 12 of the second connecting member 5 pulled up, after fitting the fitting portion 11 to the connection receiving portion 83, the wedge member 12 is pushed downward to move the second connecting member 5 downward. Fix it.

Thereby, as shown in FIG. 2, the leading handrail 1 can be installed between the pair of columns 81.

When disassembling the preceding handrail 1 assembled in this way, in reverse order to the erection work, first, the wedge member 12 of the second connecting member 5 is hit from below with a hammer or the like, and the wedge member 12 is turned upward. And the fitting portion 11 is separated from the connection receiving portion 83. At this time, either of the left and right second connecting members 5 may be removed first. Then, the diagonal member 4A is rotated so as to extend vertically. As a result, by operating the first connecting member 3 by holding the diagonal member 4A, the first connecting member 3 is separated from the lower part of the connection receiving portion 83, and the first connecting member 3 can be removed. can do.

The present invention is not limited to the above embodiment, and can be implemented in various other modes. For example, the structure of the connection receiving portion of the support column is not limited to the flange shape, and various shapes can be used. Further, according to this, the shapes of the insertion portions of the first connecting member and the second connecting member may be appropriately determined.

DESCRIPTION OF SYMBOLS 1 Leading handrail 2 Horizontal member 2a Through hole 2b Tip part 3,3A, 3B 1st connection member 3a Inner edge 4,4A, 4B Diagonal member 4a Through hole 4b Flat part 5,5A, 5B 2nd connection member 6a, 6b Side plate part 7 Connection plate part 8 Insertion part 8b Cutout 9 Horizontal member mounting part 9a Horizontal member mounting hole 10 Diagonal material mounting part 10a Diagonal material mounting hole 11 Fitting part 12 Wedge member 12a Detachment part 13 Outer plate 14 Wedge support Member 15 Notch 80 Temporary scaffold 81 Strut 82 Strut constituent member 83 Connection receiving portion 83a Insert hole 83b Insert portion peripheral edge 100, 101 Screw

Claims (4)

A horizontal member that extends in a substantially horizontal direction and a diagonal member that extends in an oblique direction are provided between the stanchions that are erected at predetermined intervals and that have connection receiving portions that are provided at predetermined intervals along the axial direction. A preceding handrail connected via a connecting member having an insertion portion that is inserted into the connection receiving portion from above,
The connecting member is
A horizontal member mounting portion that is provided at a position above the insertion portion and that is pivotally attached to the vicinity of both ends of the horizontal member,
A diagonal member mounting portion that is provided in the lower position of the horizontal member mounting portion in the vicinity of the insertion portion and pivotally mounts the diagonal member rotatably;
A leading handrail, wherein a tip end side of a connecting shaft with the horizontal member is configured to be capable of contacting the upper edge of the insertion portion. The preceding handrail according to claim 1, wherein the connecting member includes the insertion portion, the horizontal member mounting portion, and the diagonal member mounting portion that are integrally formed. The preceding handrail according to claim 1 or 2, wherein the horizontal member mounting portion is formed of a connecting piece provided above the insertion portion so as to sandwich the horizontal member from the left and right. .. The said horizontal member attachment part pivotally connects with the said horizontal member in the position which protruded inward rather than the inner side edge of the said diagonal member attachment part, The any one of Claim 1 to 3 characterized by the above-mentioned. Leading handrail.

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