JP2022015934A - Preceding handrail - Google Patents

Abstract

To provide a preceding handrail that facilitates mounting work to a connection receiving part at a high position of a support regardless of the right and left order of a connection member to be mounted.SOLUTION: A preceding handrail 20 has connection receiving parts provided at predetermined intervals along the axial direction, and a horizontal member 21 to be erected in the substantially horizontal direction and a diagonal member 51A to be erected in the oblique direction are connected through a first connection member 30A provided with an insertion part 43 to be inserted into the connection receiving parts from above. A first connecting member 30A is provided with a horizontal member mounting part 34 rotatably mounted in the vicinity of the end part of the horizontal member 21, and a diagonal member mounting part 37 rotatably mounted with the diagonal member 51; the horizontal member mounting part 34 abuts on the horizontal member 21 and is provided with a holding protrusion 34c for holding the insertion member 43 in a substantially right angle direction, and the diagonal member mounting part 37 is provided with a rotation preventing protrusion 37c to abut on the diagonal member 51A.SELECTED DRAWING: Figure 3

Description

The present invention relates to a leading handrail in a temporary scaffold erected at a construction site, and more particularly to a leading handrail provided with braces at both ends of a horizontal member to reinforce the scaffold.

Conventionally, at construction sites, etc., when assembling columns made of pipe materials into a frame shape to provide temporary scaffolding for work, a leading handrail with braces is provided so that it can withstand the load from the lateral or diagonal direction. May be provided.

As the preceding handrail, the one shown in Patent Document 1 is known. The preceding handrail described in Patent Document 1 is provided with a connecting member connected to the connecting receiving portion of the column at the tip near the connecting portion between the horizontal member and the brace, and the connecting member on both ends of the horizontal member and the brace. Is rotatably provided. The connecting member includes an insertion portion to be inserted into an insertion hole provided in the connection receiving portion of the column, and a connecting portion for connecting the insertion portion with the horizontal member and the brace.

This leading handrail is provided at both ends of the horizontal member after the insertion portion of the connecting member is inserted into the insertion hole of the connecting receiving portion from above and the horizontal member is connected between the connecting receiving portions of the adjacent columns. It is attached by fixing the tip of the brace to another connecting receiving part. Therefore, at the time of attachment to the support column, the angle formed by the insertion portion of the connecting member and the horizontal member is approximately 90 degrees.

By the way, the connecting member of the preceding handrail described in Patent Document 1 has a different configuration on both ends of the horizontal member, one of which is rotatably attached to the insertion portion and the horizontal member, and the other of which is the insertion portion. And the horizontal member is configured to be fixed.

In the preceding handrail shown in Patent Document 1, the insertion portion on the movable side is first fixed to the support column, and then the insertion portion on the fixed side is inserted into the support column connection receiving portion. That is, since the work of inserting into the connecting receiving part insertion hole can be performed independently on both ends so that the insertion part located in the horizontal member is in the vertical direction, the work of attaching the horizontal member from the lower side can be performed. Easy to do. Further, since the posture of the insertion portion is maintained on the fixed side, the insertion work can be performed while the insertion portion is maintained in the vertical posture.

Japanese Unexamined Patent Publication No. 2013-64321

However, in the above-mentioned leading handrail of Patent Document 1, since it is necessary to perform the mounting work from the determined insertion portion, it is necessary to confirm the direction of the left and right leading handrails in advance.

Therefore, the present invention is to provide a leading handrail that can facilitate the attachment work to the connecting receiving portion at a high position of the column regardless of the left-right order of the connecting member to be attached.

The present invention provides a leading handrail having the following configuration in order to solve the above technical problems.

According to the first aspect of the present invention, a horizontal member extending substantially horizontally, which has connecting receiving portions provided at predetermined intervals along the axial direction and is erected between columns erected at predetermined intervals. And the diagonal member extending in the diagonal direction are leading handrails connected via a connecting member having an insertion member inserted from above into the connecting receiving portion.
The connecting member is
A horizontal member mounting portion provided above the insertion member and rotatably mounted near the end of the horizontal member, and a horizontal member mounting portion.
It is provided at a position below the horizontal member mounting portion in the vicinity of the insertion member, and is provided with a diagonal member mounting portion for rotatably mounting the diagonal member.
The horizontal member mounting portion is provided with a holding protrusion for contacting the horizontal member and holding the insertion member in a substantially right angle direction.
The diagonal member mounting portion provides a leading handrail that comes into contact with the diagonal member and is provided with an anti-rotation protrusion for maintaining an angle between the diagonal member and the connecting member within a predetermined angle.

According to the second aspect of the present invention, the preceding handrail of the first aspect is provided in which the same connecting member is attached to both ends of the horizontal member.

According to the third aspect of the present invention, the connecting member includes a pair of side plate portions and a connecting plate portion that connects one end upper portion of these side plate portions.
The diagonal member provides the leading handrail of the first or second aspect in which the rotation prevention protrusion prevents the diagonal member from rotating toward the connecting plate portion beyond the parallel state with the horizontal member.

According to the fourth aspect of the present invention, the connecting member is provided with a horizontal plate material protruding in the horizontal direction on the upper portion of the side plate, and the holding protrusion portion is provided on the bottom portion of the horizontal plate material. Three aspects of leading handrails are provided.

According to the present invention, it is possible to facilitate the attachment work to the connecting receiving portion at a high position of the column regardless of the left-right order of the connecting members to be attached.

It is a perspective view which shows the temporary scaffold to which the preceding handrail which concerns on embodiment of this invention is applied. It is a front view which shows the structure of the leading handrail which concerns on embodiment of this invention. It is an exploded perspective view which shows one 1st connecting member. It is an exploded perspective view which shows the other 1st connecting member. It is an exploded perspective view which shows the 2nd connecting member. It is an exploded perspective view which looked at the 2nd connecting member from the direction different from FIG. It is a front view which shows the 1st process of the erection work of the preceding handrail which concerns on embodiment of this invention. It is a front view which shows the 2nd process of the erection work of the preceding handrail which concerns on embodiment of this invention. It is a front view which shows the 3rd process of the erection work of the preceding handrail which concerns on embodiment of this invention. It is a front view which shows the 4th process of the erection work of the preceding handrail which concerns on embodiment of this invention. It is a front view which shows the 5th process of the erection work of the preceding handrail which concerns on embodiment of this invention. A temporary state of one of the first connecting members is shown, (A) is a cross-sectional view, and (B) is a plan view. The erected state of the second connecting member is shown, (A) is a cross-sectional view, (B) is a plan view, and (C) is a bottom view. It is a front view which shows the erection work of the leading handrail in a reference example.

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

FIG. 1 is a perspective view showing a temporary scaffold to which the preceding handrail 20 according to the first embodiment of the present invention is applied. In this temporary scaffold, the upper layer of the first layer located at the lowermost side is constructed by using the preceding handrail 20 of the present invention.

Specifically, the temporary scaffolding 100 includes a plurality of columns 10 that are erected so as to extend in the vertical direction. These columns 10 are erected in two rows at predetermined intervals in the horizontal (horizontal) direction, and in a plan view, a pair of columns 10 and 10 on the left and right (outer peripheral direction centered on the building) and front and rear (centered on the building). (Inward / outward direction) The pair of columns 10, 10 are configured to be located at the corners of a rectangle.

Each support column 10 is formed by adding a plurality of support column configuration pipes 11 made of pipes having a circular cross section in the axial direction. The column configuration pipe 11 is provided with a replenishment portion 11a. On the outer peripheral portion of each column configuration pipe 11, connecting receiving portions 12 projecting so as to form a U-shaped cross section are provided at four locations at equal intervals in the circumferential direction.

Of these connected receiving portions 12, the connected receiving portions 12 and 12 located symmetrically are formed at the same height. The adjacent connecting receiving portions 12, 12 are formed at heights different from each other by the height dimension of the connecting receiving portions 12 along the axial direction. Further, each connecting receiving portion 12 is composed of an inclined surface 12a whose tip surface is inclined inward (toward the axial center) from the upper side to the lower side (FIGS. 12 (A) and 13 (A)). )reference). The set of these four connecting receiving portions 12 is provided at predetermined intervals along the axial direction. In addition, these connecting receiving portions 12 have a set of the upper end of the lower support column configuration pipe 11 and a set of the lower end of the upper support column configuration pipe 11 in a state where a plurality of support column configuration pipes 11 are connected by addition. The intervals are also configured to be the same. Further, the height of the adjacent columns 10 and 10 can be adjusted by using the jack base 13.

Further, the temporary scaffold 100 includes a connecting pipe 14 for connecting the columns 10 and 10 adjacent to each other in the front-rear direction. The connecting pipe 14 is composed of a pipe similar to the support column 10. At both ends of the connecting pipe 14, wedge-shaped connecting portions (not shown) connected to the opposing connecting receiving portions 12 and 12 of the columns 10 and 10 are provided. A tread plate 15 is erected on the connecting pipes 14 and 14 that are adjacent to each other in the lateral direction. The tread plate 15 has a wire mesh 16 mounted in a rectangular frame, and hook-shaped connecting portions 17 for hooking on the connecting pipe 14 at both ends.

Further, the temporary scaffold 100 includes fixing members 18A and 18B for fixing the columns 10 and 10 adjacent in the lateral direction in the first layer. The fixing member 18A is composed of a pipe similar to that of the support column 10, and wedge-shaped connecting portions (not shown) connected to the connection receiving portion 12 of the support column 10 are provided at both ends thereof. Further, the fixing member 18A is formed substantially at the same distance as the columns 10 and 10 adjacent to each other in the horizontal direction, and can also serve as a handrail by being assembled in the horizontal direction.

The fixing member 18B is composed of a pipe having an outer diameter smaller than that of the fixing member 18A, and connecting portions (not shown) connected to the connecting receiving portion 12 of the support column 10 are provided at both ends thereof. Then, the fixing member 18B is diagonally assembled between the columns 10 and 10 adjacent to each other in the lateral direction. Specifically, when the adjacent fixing member 18B is assembled so as to rise to the left, it is assembled so as to incline downward to the left from the upper end thereof, and the rigidity of the scaffold is improved by the truss structure.

The upper layer of the first layer of the temporary scaffold 100 is constructed by the same connecting pipe 14, tread 15 and fixing member 18A as in the first layer, and the preceding handrail 20 of the present invention. The fixing member 18A is used for a row of columns 10 located on the side of the building, and the preceding handrail 20 of the present invention is used for a row of columns 10 away from the building.

As shown in FIG. 2, the leading handrail 20 of this embodiment has a horizontal member 21 arranged so as to extend in the horizontal direction and a pair of first connecting members 30A arranged at both ends of the horizontal member 21. , 30B, the diagonal members 51A and 51B constituting the braces arranged on the first connecting members 30A and 30B, and the second connecting members 58A and 58B arranged on the free ends of the diagonal members 51A and 51B. , Is equipped. In the description of the preceding handrail 20, the left and right distinctions are made for the first connecting members 30A and 30B, the diagonal members 51A and 51B, and the second connecting members 58A and 58B provided at both ends of the horizontal member 21. In order to do so, uppercase letters A and B are added to the code. Reference numeral A corresponds to a member provided on the left side with respect to the horizontal member 21, and reference numeral B corresponds to a member provided on the right side with respect to the horizontal member 21.

The first connecting members 30A and 30B are the same and are attached to both ends of the horizontal member 21 in an inverted state. Similarly, the second connecting members 58A and 58B attached to the two diagonal members are the same and are fixed to the diagonal members in an inverted state.

As will be described later, the first connecting members 30A and 30B are provided with an insertion member 43 to be inserted into the connecting receiving portion 12. The insertion member 43 constitutes an insertion portion.

Specifically, the horizontal member 21 serves as a handrail in the erected state, and is composed of a pipe material having a length corresponding to the distance between the columns 10 having a smaller diameter than the columns 10. The horizontal member 21 may be configured so that the total length can be changed by, for example, a method of connecting pipe members having different diameters in a nested manner. Further, along with this, the diagonal members 51A and 51B may be configured so that the total length can be changed.

As shown in FIGS. 2, 3 and 4, one end of the horizontal member 21 is connected to the first connecting member 30A, and the other end is connected to the first connecting member 30B. As described above, in this embodiment, the first connecting members 30A and 30B have the same configuration. That is, since the horizontal member 21 is composed of one pipe member, the first connecting members 30A and 30B connected to both ends are configured as common parts and are attached to both ends of the horizontal member 21 in an inverted state.

A mounting hole 24A is provided at one end of the horizontal member 21 so as to penetrate in the minor axis direction, and similarly, a mounting hole 24B is provided at the other end so as to penetrate in the minor axis direction. The first connecting members 30A and 30B are rotatably attached to the mounting holes 24A and 24B by using bolts 23a and nuts 23b, respectively.

The first connecting members 30A and 30B are connected by inserting the insertion member 43 into the connecting receiving portion 12 of the support column 10 from above, and as described above, the first connecting members 30A and 30B can be rotated to both ends of the horizontal member 21. It is arranged. As will be described later, in this embodiment, the insertion member 43 is inserted from above to the connection receiving portion 12 of the support column 10 from the left side of the first connecting member 30A to connect, and then the first connecting member 30B on the right side is connected. Is connected to the connecting receiving portion 12 of the support column 10 by inserting the insertion member 43 from above. In the present invention, since the first connecting members 30A and 30B attached to both ends of the horizontal member 21 are the same, the connecting operation may be performed from either the left or right first connecting member 30A or 30B. Therefore, the work can be performed regardless of the order of the left and right connecting members selected at the time of mounting, and the mounting work on the connecting receiving portion of the support column of the operator is simplified. That is, the worker can perform the work without considering the left-right order of the preceding handrail 20.

As shown in FIGS. 3 and 4, the first connecting members 30A and 30B include a connecting member main body 31 having a U-shaped plan view and an insertion member 43 fixed in the connecting member main body 31. ing.

The connecting member main body 31 includes a pair of side plate portions 32a and 32b having a symmetrical shape, and a connecting plate portion 33 connecting one end upper portions of the side plate portions 32a and 32b, and a metal plate is punched out and bent. It is formed by that.

The side plate portions 32a and 32b have a gap larger than the width of the connecting receiving portion 12 in which the connecting receiving portion 12 of the support column 10 is inserted between the lower end portions. Further, the side plate portions 32a and 32b are provided with horizontal plate members 34a and 34b protruding in the horizontal direction at the upper portion. The horizontal plate members 34a and 34b form the horizontal member mounting portion 34. The horizontal plate members 34a and 34b of the horizontal member mounting portion 34 are provided with horizontal member mounting holes 35a and 35b corresponding to the mounting holes 24A (24B). The horizontal member 21 is rotatably attached to the horizontal member mounting portion 34. Specifically, the end portion of the horizontal member 21 is inserted into the horizontal plate members 34a and 34b, the bolt 23a is inserted into the mounting holes 24A (24B) of the horizontal member 21 and the horizontal member mounting holes 35a and 35b, and the nut 23b is inserted. The horizontal member 21 is rotatably attached to the horizontal member mounting portion 34.

The side plate portions 32a and 32b are provided with protruding portions 37a and 37b whose lower portions project in the same direction as the horizontal member mounting portion 34. The protruding portions 37a and 37b form the diagonal member mounting portion 37. A diagonal member mounting hole 38 is provided at the tip of the diagonal member mounting portion 37. Then, an insertion member disposing portion 39 is formed between the horizontal member mounting portion 34 and the diagonal member mounting portion 37.

The insertion member disposing portion 39 includes a first immersion portion 40 recessed in a substantially P shape so as to have a gap slightly larger than the width of the connecting receiving portion 12. The side plate portions 32a and 32b are formed so as to have high rigidity by providing the first immersion portion 40.

Further, in the upper part of the first immersion portion 40, a second immersion portion 41 recessed so as to form a truncated cone shape is provided so as to form a gap slightly larger than that of the insertion member 43. A mounting hole 42 for the insertion member is provided at the center of the second immersion portion 41.

Further, the connecting plate portion 33 is formed so that the first connecting members 30A and 30B are connected to the connecting receiving portion 12 and the lower end thereof is placed on the upper end of the connecting receiving portion 12 (FIG. 12 (FIG. 12). A) See). In other words, the end portion (connecting plate portion 33) of the connecting member main body 31 is cut off at a lower portion so as to insert the connecting receiving portion 12.

The insertion member 43 is made of metal and has a wall thickness that can be inserted into the connecting receiving portion 12. The insertion member 43 is formed so that the width corresponding to the protruding direction of the connecting receiving portion 12 is smaller than that of the connecting receiving portion 12. Further, the insertion member 43 is projected so that the upper portion thereof forms a substantially semicircular shape so as to correspond to the shape of the insertion member disposing portion 39, and the insertion member 43 is mounted at the center thereof corresponding to the mounting hole 42 of the insertion member. A hole 44 is provided. The insertion member 43 is non-rotatably fixed to the connecting member main body 31 by a screw 43a and a fixing metal fitting such as a nut (not shown).

The horizontal member mounting portions 34 of the first connecting members 30A and 30B are provided with holding protrusions 34c for holding the insertion member 43 in the direction perpendicular to the horizontal member 21. That is, a holding protrusion 34c is provided at the bottom of the horizontal plate members 34a and 34b, and the horizontal member 21 inserted between the horizontal plate members 34a and 34b comes into contact with the holding protrusion 34c, whereby the horizontal plate member 34a, The state in which the 34b and the horizontal member 21 inserted between them are parallel to each other is maintained. As a result, the insertion member 43 attached to the first connecting members 30A and 30B is held in a direction substantially perpendicular to the horizontal member 21.

The insertion member 43 does not need to be held exactly at a right angle to the horizontal member 21, but is held at a substantially right angle including a right angle and an angle in the range of several degrees in the front-rear direction, and is inserted into the connecting receiving portion 12. When the member 43 is inserted and the leading handrail 20 is erected between the columns 10 and 10, the horizontal member 21 may be supported in a substantially horizontal direction. Here, the substantially horizontal includes an angle within 10 degrees from the vertical to the support column 10. That is, the angle may be sufficient to be used as a handrail.

As shown in FIG. 3, the first connecting member 30A arranged on the horizontal member 21 has the mounting holes 24A of the horizontal member 21 and the horizontal member mounting holes 35a and 35b aligned with each other, and is rotated by bolts 23a and nuts 23b or the like. It is connected as possible. Similarly, in the first connecting member 30B arranged on the horizontal member 21, as shown in FIG. 4, the mounting holes 24B of the horizontal member 21 and the horizontal member mounting holes 35a and 35b are aligned with each other, and the bolts 23a and nuts 23b and the like are aligned. It is rotatably connected by.

The first connecting members 30A and 30B described above rotate with respect to the horizontal member 21, and when the holding protrusion 34c and the horizontal member 21 come into contact with each other, the rotation of the first connecting members 30A and 30B is stopped. , The state in which the horizontal member 21 and the horizontal plate members 34a and 34b of the first connecting members 30A and 30B are parallel to each other is maintained. As a result, the insertion member 43 is held so as to extend in the direction perpendicular to the horizontal member 21.

As shown in FIGS. 3 and 4, the diagonal members 51A and 51B are composed of pipes having an outer diameter that can be arranged between the side plate portions 32a and 32b of the connecting member main body 31. The diagonal members 51A and 51B are in a state where the upper ends are rotatably connected to the first connecting members 30A and 30B, and the lower ends are the lower portions of the connecting receiving portions 12 of the columns 10 connecting the other first connecting members 30B and 30A. It is formed with dimensions extending over the connecting receiving portion 12. As shown in FIG. 2, in this embodiment, it is formed in a dimension extending to the connecting receiving portion 12 two below.

Specifically, at the upper end (one end) of the diagonal members 51A and 51B, a through hole 52 for rotatably disposing with respect to the first connecting members 30A and 30B is formed so as to penetrate in the radial direction. It is provided. The diagonal member mounting holes 38 and the through holes 52 are combined, and the diagonal members 51A and 51B are rotatably mounted on the diagonal member mounting portion 37 by using bolts 53a and nuts 53b.

As shown in FIG. 12A, the through hole 52 is provided with the first connecting member 30A assembled to the connecting receiving portion 12 so that the end portion of the diagonal member 51A does not interfere with the connecting receiving portion 12. It is installed at a sufficiently distant position. Similarly, although not specifically shown, it is sufficient that the end portion of the diagonal member 51B does not interfere with the connecting receiving portion 12 in a state where the first connecting member 30B is assembled to the connecting receiving portion 12. It is installed at a distant position. As a result, as shown in the figure, the ends of the diagonal members 51A and 51B enter the lower part of the connecting receiving portion 12 in an erected state in which the diagonal members 51A and 51B are rotated so as to extend diagonally. .. Further, the ends of the diagonal members 51A and 51B are separated from the lower part of the connecting receiving portion 12 in a non-erected state in which the diagonal members 51A and 51B are rotated so as to extend vertically downward.

Anti-rotation protrusions 37d that regulate the rotation of the diagonal members 51A and 51B are provided on the diagonal member mounting protrusions 37a and 37b that form the diagonal member mounting portion 37. The rotation prevention protrusion 37d regulates that the diagonal members 51A and 51B rotate from the diagonal member mounting holes 38 in the direction of the connecting plate portion 33 by a predetermined angle or more. The rotation prevention protrusion 37d keeps the angle between the diagonal members 51A and 51B and the first connecting members 30A and 30B within a predetermined angle. In this embodiment, as shown by the virtual line 51A in FIG. 12 (A), the diagonal member 51A abuts on the horizontal member 21 at an angle slightly smaller than the right angle to prevent the rotation prevention protrusion 37d, and the diagonal member 51A rotates. Is regulated.

The rotation prevention protrusion 37d may be provided at a position where the diagonal member 51A abuts on the horizontal member 21 at an angle exceeding a right angle, and the diagonal member 51A is used to attach the first connecting member 30A to the horizontal member 21. Any angle may be used as long as the force can be applied in the directions orthogonal to each other.

When the first connecting members 30A and 30B are rotated so as to be orthogonal to the horizontal member 21 by using the diagonal members 51A and 51B, the rotation prevention protrusion 37d is connected to the diagonal members 51A and 51B and the first connecting member 30A. , The rotation of the diagonal members 51A and 51B is restricted in order to maintain the angle with the 30B at an angle that the first connecting members 30A and 30B can rotate.

In this embodiment, the rotation prevention protrusion 37d is inclined in order to prevent the diagonal members 51A and 51B from further rotating in the direction of the connecting plate portion 33 from an angle orthogonal to the horizontal plate members 34a and 34b. The members 51A are configured to abut the anti-rotation protrusions 37d and the diagonal members 51A and 51B at an angle slightly beyond the angle orthogonal to the horizontal plates 34a and 34b.

As shown in FIG. 14, in the case of the first connecting members 30A'and 30B' without the rotation prevention protrusion 37d, the diagonal members 51A and 51B are further connected from an angle orthogonal to the horizontal plate members 34a and 34b. The first connecting members 30A'and 30B' may rotate in the direction of the plate portion 33 and may be positioned substantially parallel to the horizontal member 21. In the example of FIG. 14, when the diagonal member 51B rotates to a position substantially parallel to the horizontal member 21 with respect to the first connecting member 30B', the diagonal member 51B makes the first connecting member 30B orthogonal to the horizontal member 21. You will not be able to apply force in the direction. In such a state, the diagonal member 51B and the first connecting member 30B are moved downward within the reach of the operator, the first connecting member 30B is rotated with respect to the diagonal member 51B, and the diagonal member 51B is used. It is necessary to redo the work so that the first connecting member 30B and the horizontal member 21 can be rotated to a position orthogonal to each other, resulting in poor workability.

On the other hand, as in this embodiment, by providing the rotation prevention protrusion 37d, the first connecting members 30A and 30B and the horizontal member 21 can be rotated to positions orthogonal to each other by using the diagonal members 51A and 51B. The angle between the diagonal members 51A and 51B and the first connecting members 30A and 30B can be maintained at an appropriate angle.

Further, as shown in FIGS. 5 and 6, the diagonal members 51A and 51B are provided with a flat portion 54 having a vertically long elliptical cross-section with a reduced dimension in the width direction at substantially the center where they intersect each other in the erected state. ing. Further, a flat pressed second connecting member mounting portion 55 is provided at the lower end of the diagonal members 51A and 51B, which are free ends. The second connecting member mounting portion 55 is provided with a mounting hole 56.

As shown in FIG. 2, the second connecting members 58A and 58B connect the ends of the diagonal members 51A and 51B to the connecting receiving portion 12 of the support column 10. As shown in FIGS. 5 and 6, the second connecting members 58A and 58B have a fitting portion 59 fitted to the connecting receiving portion 12 and a bracket portion 66 for fixing to the second connecting member mounting portion 55. It is equipped with. The second connecting members 58A and 58B are the same and are fixed to the diagonal members 51A and 51B in an inverted state.

The fitting portion 59 includes an upper surface portion 60 and a lower surface portion 61 that cover the upper and lower end portions of the connecting receiving portion 12, and a continuous portion 62 that connects them. The upper surface portion 60 is provided with a protruding portion 63 that projects downward and abuts on the upper end portion of the connecting receiving portion 12. Further, the upper surface portion 60 is provided with a first insertion hole 64, which is located above the connection receiving portion 12 in a connected state and for inserting the wedge member 68. The lower surface portion 61 is provided with a second insertion hole 65 having a width wider in the front-rear direction than the first insertion hole 64. The bracket portion 66 is provided by being bent from the end edge of the continuous portion 62 so as to extend parallel to the insertion holes 64 and 65. The bracket portion 66 is provided with a through hole 67, and is fixed to the second connecting member mounting portion 55 by bolts 67a and nuts 67b.

Further, the second connecting members 58A and 58B include a separate wedge member 68. The wedge member 68 is made of a metal plate having a substantially triangular shape, and its wall thickness is slightly smaller than that of the first insertion hole 64. The wedge member 68 is provided with a retaining portion 69 by bending or the like at the lower end portion in a state where the first insertion hole 64 is inserted. The lower end of the retaining portion 69 is configured to be wider than the width of the first insertion hole 64 and narrower than the width of the second insertion hole 65.

The leading handrail 20 configured in this way is suitably used as a leading handrail when constructing the upper second layer or higher after the construction of the first layer of the scaffold. Next, the erection work using the leading handrail 20 will be described.

First, as shown in FIG. 7, the leading handrail 20 before erection has the horizontal member 21 with respect to the first connecting member 30A so that the pair of diagonal members 51A and 51B extend in parallel with the horizontal member 21. The horizontal member 21 is rotated by 90 degrees so as to be overlapped with the first diagonal member 51A. Further, the first connecting member 30B is rotated 90 degrees with respect to the horizontal member 21, and the second diagonal member 51B is further rotated 90 degrees. In this state, as shown in the figure, the insertion member 43 of one of the first connecting members 30A is inserted from above and connected to the connecting receiving portion 12 above the tread plate 15. In this embodiment, the insertion member 43 of the first connecting member 30A is inserted from above and connected to the connecting receiving portion 12 six above the tread plate 15. The first connecting members 30A and 30B to be inserted may be either the left or right first connecting members 30A or 30B attached to the horizontal member 21, and the direction in which the operator can easily work may be selected. In this example, the insertion member 43 of the first connecting member 30A attached to the left side of the horizontal member 21 is inserted into the connecting receiving portion 12 of the left column 10 to be connected.

Next, as shown in FIG. 8, the side of the first connecting member 30B of the unconnected horizontal member 21 is rotated upward by the diagonal member 51B, and the other first connecting member 30B is 90 with respect to the horizontal member 21. Rotate the degree.

The diagonal member 51B is gripped and the horizontal member 21 is pushed upward. At this time, the rotation prevention protrusion 37d and the diagonal member 51B come into contact with each other to suppress the rotation of the diagonal member 51B. It is possible to maintain a state in which the insertion member 43 protrudes in the orthogonal direction with respect to the horizontal member 21.

After that, the diagonal member 51B arranged on the first connecting member 30B is grasped, and as shown in FIG. 9, the first connecting member 30B is placed above the connecting receiving portion 12 six pieces above the tread 15 in the adjacent column 10. The insertion member 43 of the first connecting member 30B is inserted into the connecting receiving portion 12 from above and connected.

At this time, in this embodiment, since the rotation of the diagonal member 51B is suppressed by the rotation prevention protrusion 37d, the first connecting member is in a state where the insertion member 43 protrudes in the direction orthogonal to the horizontal member 21. It is easy to maintain 30B. By moving the insertion member 43 downward along with the diagonal member 51B along the support column, the insertion member 43 can be easily positioned and inserted with respect to the connecting receiving portion 12.

In this way, as shown in FIG. 10, when the pair of first connecting members 30A and 30B are connected to the connecting receiving portions 12 and 12 of the adjacent columns 10 and 10, subsequently, as shown in FIG. The material 51B is rotated on the opposite column 10 toward the connecting receiving portion 12 located two below the connecting receiving portion 12 to which the first connecting member 30A is connected. Then, in a state where the wedge member 68 of the second connecting member 58B is pulled upward, the fitting portion 59 is fitted to the connecting receiving portion 12, and then the wedge member 68 is pushed down downward to form the second insertion hole 65. Penetrate.

Next, the diagonal member 51A arranged on the first connecting member 30A is grasped, and the support portion 10 on the opposite side is directed toward the connecting receiving portion 12 located two below the connecting receiving portion 12 to which the first connecting member 30B is connected. And rotate. Then, in a state where the wedge member 68 of the second connecting member 58A is pulled upward, the fitting portion 59 is fitted to the connecting receiving portion 12, and then the wedge member 68 is pushed down downward to form the second insertion hole 65. Penetrate. As a result, as shown in FIG. 2, the leading handrail 20 can be erected between the pair of columns 10 and 10.

In the leading handrail 20 assembled in this way, in the first connecting member 30A, as shown in FIGS. 12A and 12B, the insertion member 43 is inserted into the connecting receiving portion 12 from above. Make an eggplant. Further, the end portion of the diagonal member 51A is in a state of entering the lower portion of the connecting receiving portion 12 by the rotation of the diagonal member 51A due to the erection operation. Similarly, although not shown, in the first connecting member 30B, the insertion member 43 is inserted into the connecting receiving portion 12 from above. Further, the locking portion 53 of the diagonal member 51B is in a state of entering the lower part of the connecting receiving portion 12 by the rotation of the diagonal member 51B due to the erection operation.

Therefore, in this state, when a load that moves the first connecting members 30A and 30B upward is applied, the locking portion 53 of the diagonal members 51A and 51B abuts on the lower end of the connecting receiving portion 12, so that the first It is possible to prevent the connecting members 30A and 30B from falling off.

Further, in the second connecting members 58A and 58B, as shown in FIGS. 13A, 13B, and 13C, the wedge member 68 is penetrated through the connecting receiving portion 12 of the support column 10, and its edge is an inclined surface. It is pressed against 12a. Therefore, in this connected state, the second connecting members 58A and 58B do not fall off even if an external force is applied to a portion other than the lower end of the wedge member 68. Further, the wedge member 68 is surely pressed downward with a hammer or the like, so that the wedge member 68 does not easily come off even if an upward external force is applied to the lower end.

When disassembling the leading handrail 20 assembled in this way, first, the wedge member 68 of the second connecting member 58A is hit from below with a hammer or the like in the reverse order of the erection work, and the wedge member 68 faces upward. The fitting portion 59 is moved to and detached from the fitting portion 59. After that, the diagonal member 51A on which the second connecting member 58A is arranged is rotated so as to extend vertically. As a result, the locking portion 53 of the diagonal member 51A can be separated from the lower part of the connecting receiving portion 12, and the first connecting member 30A can be made detachable.

Next, the wedge member 68 of the second connecting member 58B is hit from below with a hammer or the like, the wedge member 68 is moved upward, and the fitting portion 59 is moved and detached. After that, the diagonal member 51B on which the second connecting member 58B is arranged is rotated so as to extend vertically. As a result, the locking portion 53 of the diagonal member 51B can be separated from the lower part of the connecting receiving portion 12, and the first connecting member 30B can be made detachable.

In this state, the diagonal member 51B is pushed upward to separate the first connecting member 30B from the connecting receiving portion 12. After that, the diagonal member 51B is rotated with respect to the first connecting member 30B so that the horizontal member 21 and the diagonal member 51B overlap each other, and the horizontal member 21 is rotated with respect to the first connecting member 30A. As a result, in a state where the diagonal members 51A and 51B and the horizontal member 21 are overlapped with each other, the first connecting member 30A is separated from the connecting receiving portion 12 by pushing up the whole.

The preceding handrail 20 for temporary scaffolding of the present invention is not limited to the configuration of the above embodiment, and various modifications can be made.

For example, in each of the above-described embodiments, the horizontal member 21, the diagonal members 51A, and 51B are composed of pipes having a circular cross-sectional shape, but they may have a rectangular shape, and the cross-sectional shape can be changed as desired. Of course, it is not limited to the hollow, and a solid bar may be used.

10: Support 12: Connecting receiving portion 21: Horizontal members 30A, 30B: First connecting member 31: Connecting member main body 32a: Side plate portion 32b: Side plate portion 33: Connecting plate portion 34: Horizontal member mounting portions 34a, 34b: Horizontal plate material 34c: Holding protrusion 35a: Horizontal member mounting hole 35b: Horizontal member mounting hole 37: Oblique member mounting portion 37a: Protruding portion 37b: Protruding portion 37d: Rotation prevention protrusion 38: Diagonal member mounting hole 39: Insertion member arrangement Installation 51A, 51B: Oblique material (bracing)
100: Temporary scaffolding

Claims (4)

A horizontal member extending in a substantially horizontal direction and a diagonal member extending in an oblique direction, which have connecting receiving portions provided at predetermined intervals along the axial direction and are erected between columns erected at predetermined intervals, are formed. It is a leading handrail connected via a connecting member provided with an insertion member inserted from above into the connecting receiving portion.
The connecting member is
A horizontal member mounting portion provided above the insertion member and rotatably mounted near the end of the horizontal member, and a horizontal member mounting portion.
It is provided at a position below the horizontal member mounting portion in the vicinity of the insertion member, and is provided with a diagonal member mounting portion that rotatably pivotally attaches the diagonal member.
The horizontal member mounting portion is provided with a holding protrusion for contacting the horizontal member and holding the insertion member in a substantially right angle direction.
The diagonal member mounting portion is provided with an anti-rotation protrusion for contacting the diagonal member and keeping the angle between the diagonal member and the connecting member within a predetermined angle.
Leading handrail. The same connecting member is attached to both ends of the horizontal member.
The preceding handrail according to claim 1. The connecting member includes a pair of side plate portions and a connecting plate portion that connects one end upper portion of these side plate portions.
The diagonal member prevents the diagonal member from rotating toward the connecting plate portion beyond the state in which the diagonal member is parallel to the horizontal member.
The preceding handrail according to claim 1 or 2. The connecting member is provided with a horizontal plate material protruding in the horizontal direction at the top of the side plate, and the holding protrusion is provided at the bottom of the horizontal plate material.
The preceding handrail according to claim 3.

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