JP7619863B2 - Working scaffolding - Google Patents

Description

The present invention relates to a movable and foldable work platform.

Conventionally, mobile work scaffolding has been used to carry out interior construction work on buildings. In particular, when carrying out interior construction work, work scaffolding with a foldable structure is used so that it can be passed through the door of the building or placed on an elevator (see, for example, Patent Documents 1 and 2).

The folding work scaffolding disclosed in Patent Document 1 has a pair of legs supported by casters at both ends of the long side of the scaffolding. A pantograph-shaped brace is provided to connect the pair of legs. The brace is provided so that it can expand and contract in the long side direction of the work scaffolding within a vertical plane.

With the above-mentioned configuration, the folding work scaffolding of Patent Document 1 can be folded by shortening the braces and bringing one leg closer to the other leg. This makes it possible to reduce the dimension of the long side of the work scaffolding.

The work scaffolding disclosed in Patent Document 2 includes four main legs, a pair of diagonal bars (hereinafter referred to as upper diagonal bars) attached to the upper parts of the four main legs, another pair of diagonal bars (hereinafter referred to as lower diagonal bars) attached to the lower parts of the four main legs, and an axle (hereinafter referred to as support axle) supporting the pair of upper diagonal bars and the pair of lower diagonal bars. Each main leg is provided with a telescopic leg equipped with casters. The pair of upper diagonal bars are supported at their centers rotatably on the upper end of the support axle so that they can be opened and closed in a horizontal plane while crossing each other to form an X shape when viewed from above. The pair of lower diagonal bars are supported at their centers rotatably on the lower end of the support axle so that they can be opened and closed in a horizontal plane while crossing each other to form an X shape when viewed from above.

With the above-mentioned configuration, the work scaffolding of Patent Document 2 can be folded by closing a pair of upper diagonal bars and a pair of lower diagonal bars while moving a pair of main legs on one side in the width direction (short side direction of the scaffolding) closer to a pair of main legs on the other side. This makes it possible to reduce the width dimension of the work scaffolding.

JP 2011-52474 A Japanese Utility Model Application Publication No. 6-24133

As described above, the work scaffolds disclosed in Patent Documents 1 and 2 can both be folded, allowing the work scaffolds to be moved in a reduced size. However, as a result of various studies by the inventors, it was found that the following problems arise with work scaffolds with the above-mentioned structure.

Figure 1 is a diagram for explaining the problems with a work scaffold having a diagonal brace that can expand and contract in a horizontal plane. The work scaffold 100 shown in Figure 1 comprises a pair of legs 102 spaced apart in the long side direction of the work scaffold 100, and a diagonal brace 104 connecting the pair of legs 102. The legs 102 are supported movably by casters 106. Note that, for ease of explanation, Figure 1 omits the illustration of the work floor (the part supported by the upper ends of the pair of legs 102 and serving as a foothold for workers) and handrails that the work scaffold 100 comprises.

The brace 104 is configured to be expandable and contractable in a vertical plane, similar to the brace of the work scaffold disclosed in Patent Document 1. As shown in FIG. 1, when folding the work scaffold 100, one leg 102 is moved toward the other leg 102. At this time, if the worker presses the part of the leg 102 above the connection part with the brace 104, it is not possible to apply force evenly to the upper and lower members of the brace 104. In this case, as shown in FIG. 2, the leg 102 is pushed in an inclined state, and a bending force is applied to some of the components of the brace 104. As a result, the brace 104 may be damaged. In this way, when the work scaffold has a brace that can expand and contract in a vertical plane, it may not be possible to fold the work scaffold smoothly.

On the other hand, in the work scaffolding disclosed in Patent Document 2, a pair of diagonal bars are arranged to rotate in a horizontal plane, which makes it possible to prevent the occurrence of bending forces as shown in FIG. 2. It is therefore believed that the work scaffolding can be folded smoothly. However, in the configuration disclosed in Patent Document 2, the dimensions of the diagonal bars do not change, so the dimensions of the long side of the work scaffolding cannot be reduced.

Therefore, the present invention aims to provide a work platform that can be folded smoothly and has a small dimension in the long side direction.

The gist of the present invention is the following work scaffolding:

(1) a rectangular work platform;
A pair of first supports arranged apart from each other in the short side direction of the work floor, supporting the work floor on one side of the center of the work floor in the long side direction of the work floor, and supported by casters each provided to be rotatable;
A pair of second supports arranged apart from each other in the short side direction and supporting the work floor on the other side of the center of the work floor in the long side direction, each supported by a rotatable caster;
A first telescopic section provided on one side of the center of the work floor in the long side direction and connected to the pair of first pillars;
A second telescopic section is provided on the other side of the center of the work floor in the long side direction and is connected to the first telescopic section and the pair of second pillars;
a pair of connecting members extending in the long side direction so as to connect the pair of first pillars and the pair of second pillars;
The first telescopic portion has a pair of first cross members that cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in a horizontal direction,
The second telescopic portion has a pair of second cross members that cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in a horizontal direction,
One of the pair of connecting members connects the first support pillar and the second support pillar on one side in the short side direction, and the other of the pair of connecting members connects the first support pillar and the second support pillar on the other side in the short side direction,
A work scaffolding in which each of the pair of connecting members is provided so as to be bent upward.

(2) Each of the pair of connecting members is
As the pair of first pillars and the pair of second pillars approach each other in the long side direction, the central portions in the long side direction are bent so as to move upward, and the length in the long side direction is shortened,
The work scaffolding described in (1) above, wherein the central portion extends downward as the pair of first pillars and the pair of second pillars move apart in the long side direction, thereby increasing the length in the long side direction.

(3) A work scaffolding as described in (2) above, in which the pair of connecting members are located outside the connection between the first and second telescopic sections in the short side direction.

(4) In the long side direction, the distance between the rotation center of the pair of first horizontal members and the center of the work floor is smaller than the distance between the rotation center of the pair of first horizontal members and the axis of each of the first supports,
A work scaffolding described in any of (1) to (3) above, wherein in the long side direction, the distance between the pivot center of the pair of second cross members and the center of the work floor is smaller than the distance between the pivot center of the pair of second cross members and the axis of each of the second supports.

(5) A work scaffolding as described in any one of (1) to (4) above, in which the first support and the second support are connected to the connecting material so as to be able to rotate horizontally relative to the connecting material.

(6) Each of the pair of connecting members includes a first rod-shaped member connected to the first support column so as to be rotatable in a vertical direction relative to the first support column, and a second rod-shaped member connected to the second support column so as to be rotatable in a vertical direction relative to the second support column,
A work scaffolding described in any of (1) to (5) above, wherein the first rod-shaped member and the second rod-shaped member are connected to each other at the center in the long side direction of the connecting material so as to be rotatable in the vertical direction.

(7) The work scaffold described in (6) above, in which each of the pair of connecting members is provided with a locking member that is locked to the first rod member and the second rod member at the center of the connecting member to prevent the connecting member from bending downward.

(8) The work scaffold described in (7) above, in which each of the pair of connecting members is provided with a restricting member that restricts the first rod-shaped member and the second rod-shaped member from rotating relative to each other so that the locking member moves downward from a state in which the connecting members are bent upward.

The present invention provides a work platform that can be folded smoothly and has a small dimension in the long side direction.

FIG. 1 is a diagram for explaining the problems with a work scaffold having a diagonal brace that is extendable and retractable in a horizontal plane. FIG. 2 is a diagram for explaining the problems with a work scaffold having a diagonal brace that is extendable and retractable in a horizontal plane. FIG. 3 is a front view showing a work scaffold according to an embodiment of the present invention. FIG. 4 is a plan view of the working platform of FIG. FIG. 5 is a left side view of the work platform of FIG. 3 . FIG. 6 is a diagram showing a pair of support units. FIG. 7 is a diagram showing a support. FIG. 8 is a diagram showing a support. FIG. 9 is a diagram showing a support. FIG. 10 is a diagram showing a support. FIG. 11 is a diagram showing the work scaffold with the work floor removed. FIG. 12 is a view of the connection portion and its surroundings as viewed from one side in the long side direction of the work platform. FIG. 13 is a view showing a portion AA of FIG. FIG. 14 is a diagram for explaining the connection portion and the support mechanism. FIG. 15 is a diagram showing a connecting material. FIG. 16 is a diagram showing a connecting material. FIG. 17 is a diagram showing the first rod member. FIG. 18 is a diagram showing the second rod-shaped member. FIG. 19 is a diagram showing the locking member and the restricting member. FIG. 20 is a diagram for explaining the relationship between the posts and the connecting members. FIG. 21 is a diagram for explaining the relationship between the posts and the connecting members. FIG. 22 is a diagram for explaining the operation of the work scaffold. FIG. 23 is a diagram for explaining the operation of the work scaffold. FIG. 24 is a diagram showing the center of the connecting material in the long side direction. FIG. 25 is a diagram for explaining the operation of the connection portion. FIG. 26 is a diagram showing another example of the connecting material. FIG. 27 is a diagram showing a first rod-shaped member and a second rod-shaped member. FIG. 28 is a diagram showing the center of the connecting material in the long side direction. FIG. 29 is a diagram showing another example of the first connecting member. FIG. 30 is a diagram showing the first connecting member and the first rod-shaped member. FIG. 31 is a diagram showing another example of the connection portion. FIG. 32 is a diagram showing another example of a method for connecting a pair of support units. FIG. 33 is a diagram showing another example of the configuration of the first restriction mechanism. FIG. 34 is a diagram showing another configuration example of the work scaffold. FIG. 35 is a diagram showing another example of the configuration of the support. FIG. 36 is a diagram showing another example of the configuration of the support. FIG. 37 is a diagram showing another configuration example of the work scaffold.

(Configuration of work scaffolding)
A work scaffold according to an embodiment of the present invention will be described below with reference to the drawings. Fig. 3 is a front view showing a work scaffold according to an embodiment of the present invention, Fig. 4 is a plan view of the work scaffold of Fig. 3, and Fig. 5 is a left side view of the work scaffold of Fig. 3. Note that in Figs. 3 and 4, some of the components of the work scaffold 10 are omitted to avoid cluttering the drawings.

As shown in FIG. 3, the work scaffold 10 according to this embodiment includes a work floor 12, a pair of support units 14a, 14b, a connection portion 16, and a support mechanism 18. The work floor 12 is supported by the pair of support units 14a, 14b via the connection portion 16 and the support mechanism 18, as will be described in detail later. Although not shown to avoid cluttering the drawings, when a worker works, a handrail frame is attached to the work floor 12 so as to cover the periphery of the work floor 12. In addition, when a worker ascends or descends the work floor 12, a ladder is used. The handrail frame and the ladder can be configured using various known handrail frame and ladder configurations, so a description thereof will be omitted.

As shown in FIG. 4, the work floor 12 has a rectangular shape when viewed from above. In this embodiment, the work floor 12 has a rectangular shape with corners 12a to 12d at the four corners. As shown in FIGS. 3 and 4, in this embodiment, the work floor 12 has a first floor section 20 and a second floor section 22 arranged side by side in the long side direction of the work floor 12. In this embodiment, the first floor section 20 is provided on one side of the long side direction of the work floor 12, and the second floor section 22 is provided on the other side of the long side direction of the work floor 12. In the following, when simply referring to the long side direction, it means the long side direction of the work floor 12. Also, when simply referring to the short side direction, it means the short side direction of the work floor 12. Note that the shape of the work floor is not limited to the shape shown in FIG. 4, and the work floor may be configured to form an approximately rectangular shape as a whole. When the work floor is not completely rectangular, the long side direction means the longitudinal direction of the work floor, and the short side direction means the transverse direction of the work floor. In this embodiment, the corners 12a to 12d are bent at right angles when viewed from above, but for example, the corners may be chamfered when viewed from above.

The first floor section 20 has a rectangular frame body 20a when viewed from above, and a pair of connecting members 20b fixed to the frame body 20a and extending in the long side direction. The second floor section 22 is configured similarly to the first floor section 20, and has a frame body 22a and a pair of connecting members 22b. Although not shown to avoid cluttering the drawing, a mesh-like floor material (the part that serves as a foothold for workers) is fixed onto the frame body 20a. Similarly, a mesh-like floor material is fixed onto the frame body 22a. The floor material is not limited to a mesh-like one, and may be a plate-like one, but it is preferable that it is treated with an anti-slip coating.

Figure 6 shows the support units 14a and 14b, where (a) is a plan view of the support units 14a and 14b, and (b) is a front view of the support units 14a and 14b. In order to avoid cluttering the drawing, some of the configuration of the support units 14a and 14b (casters, etc.) are omitted in Figure 6(a). In the drawings described below, some of the configuration of the work scaffold 10 is also omitted as appropriate. In Figure 6, the support units 14a and 14b are shown separated from each other, but in the work scaffold 10, the support units 14a and 14b are connected to each other. The connection of the support units 14a and 14b will be described later.

As shown in FIG. 6, the support unit 14a has a pair of supports 40, 42 arranged to cross each other when viewed from above, and the support unit 14b has a pair of supports 44, 46 arranged to cross each other when viewed from above.

Figure 7 shows support 40, Figure 8 shows support 42, Figure 9 shows support 44, and Figure 10 shows support 46. In Figures 7 and 8, (a) is a plan view of the support, (b) is a left side view of the support, and (c) is a front view of the support. In Figures 9 and 10, (a) is a plan view of the support, (b) is a right side view of the support, and (c) is a front view of the support.

As shown in FIG. 7, the support 40 has a vertically extending pillar 40a, a number of horizontal members 40b, 40c, and 40d, and a number of vertical members 40e and 40f. The pillar 40a is supported by a caster 40g equipped with wheels. The caster 40g is attached to the pillar 40a so that it can rotate around a rotation axis extending in the vertical direction. As shown in FIG. 4, when the work scaffold 10 is used, the corner 12a of the work floor 12 is supported by the pillar 40a.

7, in this embodiment, the support 40a has a columnar or cylindrical first member 41a, a cylindrical second member 41b, and a columnar or cylindrical third member 41z. The upper part of the first member 41a is inserted into the second member 41b from below the second member 41b. The second member 41b is configured to be movable in the vertical direction relative to the first member 41a and to be fixed to the first member 41a at a predetermined height. In this embodiment, the vertical length of the support 40 can be adjusted by adjusting the fixed height of the second member 41b relative to the first member 41a. The lower part of the third member 41z is inserted into the second member 41b from above the second member 41b. The third member 41z is configured to be movable in the vertical direction relative to the second member 41b and to be fixed to the second member 41b at a predetermined height. The third member 41z will be described later. The caster 40g is attached to the lower end of the first member 41a. The cross-sectional shapes (shapes of cross sections perpendicular to the axial direction) of the first member 41a, the second member 41b, and the third member 41z may be circular (cylindrical, cylindrical) or polygonal (prism, rectangular tube). The same applies to the first members 43a, 45a, 47a, the second members 43b, 45b, 47b, and the third members 43z, 45z, 47z described below.

One end of the cross member 40b is connected to the support 40a. In this embodiment, one end of the cross member 40b is fixed to the second member 41b of the support 40a. In this embodiment, the cross member 40b has a columnar or cylindrical main body 41c extending horizontally from the support 40a (second member 41b) and a rotating part 41d provided at the tip of the main body 41c. The rotating part 41d has a through hole penetrating in the vertical direction. In this embodiment, the rotating part 41d is formed in a cylindrical shape. The main body 41c has a through hole 41e penetrating in the vertical direction. As shown in FIG. 3, in the long side direction of the work floor 12, it is preferable that the distance d1 between the center of the through hole 41e and the center of the work floor 12 is smaller than the distance d2 between the center of the through hole 41e and the axis of each support 40a, 42a. In this embodiment, in the long side direction of the work floor 12, the through hole 41e is positioned on the other side (the side of the supports 44a and 46a) of the center of the cross member 40b.

As shown in FIG. 7, the cross member 40c is provided below the cross member 40b. One end of the cross member 40c is connected to the support 40a. In this embodiment, one end of the cross member 40c is fixed to the second member 41b, similar to the cross member 40b. In this embodiment, the cross member 40c has a columnar or cylindrical main body 41f extending horizontally from the support 40a (second member 41b) and a rotating part 41g provided at the tip of the main body 41f. The rotating part 41g has a through hole penetrating in the vertical direction. In this embodiment, the rotating part 41g is formed in a cylindrical shape. In the main body 41f, a through hole 41h penetrating in the vertical direction is formed so as to be located below the through hole 41e. In the long side direction of the work floor 12 (see FIG. 3), the distance between the center of the through hole 41h and the center of the work floor 12 is preferably smaller than the distance between the center of the through hole 41h and the axis of each of the pillars 40a, 42a. In this embodiment, in the long side direction of the work floor 12, the through hole 41h is positioned on the other side (the side of the pillars 44a, 46a) of the center of the cross member 40c.

The cross member 40d is provided below the cross member 40c. One end of the cross member 40d is connected to the support 40a. In this embodiment, one end of the cross member 40d is fixed to the second member 41b, similar to the cross members 40b and 40c. In this embodiment, the cross member 40d has a columnar or cylindrical main body 41i extending horizontally from the support 40a (second member 41b) and a rotating part 41j provided at the tip of the main body 41i. The rotating part 41j has a through hole penetrating in the vertical direction. In this embodiment, the rotating part 41j is formed in a cylindrical shape. In the main body 41i, a through hole 41k penetrating in the vertical direction is formed so as to be located below the through holes 41e and 41h. In the long side direction of the work floor 12 (see FIG. 3), the distance between the center of the through hole 41k and the center of the work floor 12 is preferably smaller than the distance between the center of the through hole 41k and the axis of each of the pillars 40a, 42a. In this embodiment, in the long side direction of the work floor 12, the through hole 41k is positioned on the other side (the side of the pillars 44a, 46a) of the center of the cross member 40d.

Vertical member 40e connects horizontal member 40b to horizontal member 40c, and vertical member 40f connects horizontal member 40c to horizontal member 40d. When viewed from above, horizontal member 40b, horizontal member 40c, and horizontal member 40d are arranged to extend in the same direction from support 40a.

As shown in FIG. 8, the support 42 has a support 42a extending in the vertical direction, a plurality of horizontal members 42b, 42c extending in the horizontal direction, a vertical member 42d extending in the vertical direction, and a diagonal member 42e extending in the vertical direction. The support 42a is supported by a caster 42f equipped with wheels. The caster 42f is attached to the support 42a so that it can rotate around a rotation axis extending in the vertical direction. As shown in FIG. 4, when the work scaffold 10 is used, the corner 12b of the work floor 12 is supported by the support 42a. In this embodiment, the support 40a, 42a are arranged apart from each other in the short side direction and support the work floor 12 on one side of the center of the work floor 12 in the long side direction, and the support 40a, 42a correspond to the first support.

8, in this embodiment, the support 42a has a columnar or cylindrical first member 43a, a cylindrical second member 43b, and a columnar or cylindrical third member 43z. The upper part of the first member 43a is inserted into the second member 43b from below the second member 43b. The second member 43b is configured to be movable in the vertical direction relative to the first member 43a and to be fixed to the first member 43a at a predetermined height. In this embodiment, the vertical length of the support 42 can be adjusted by adjusting the fixed height of the second member 43b relative to the first member 43a. The lower part of the third member 43z is inserted into the second member 43b from above the second member 43b. The third member 43z is configured to be movable in the vertical direction relative to the second member 43b and to be fixed to the second member 43b at a predetermined height. The third member 43z will be described later. The caster 42f is attached to the lower end of the first member 43a.

One end of the cross member 42b is connected to the support 42a. In this embodiment, one end of the cross member 42b is fixed to the second member 43b of the support 42a. In this embodiment, the cross member 42b has a columnar or cylindrical main body 43c extending horizontally from the support 42a (second member 43b) and a rotating part 43d provided at the tip of the main body 43c. The rotating part 43d has a through hole penetrating in the vertical direction. In this embodiment, the rotating part 43d is formed in a cylindrical shape. The main body 43c has a through hole 43e penetrating in the vertical direction. As shown in FIG. 3, in the long side direction of the work floor 12, the distance between the center of the through hole 43e and the center of the work floor 12 is preferably smaller than the distance between the center of the through hole 43e and the axis of each support 40a, 42a. In this embodiment, in the long side direction of the work floor 12, the through hole 43e is positioned on the other side (the side of the supports 44a and 46a) of the center of the cross member 42b.

As shown in FIG. 8, the cross member 42c is provided below the cross member 42b. One end of the cross member 42c is connected to the support 42a. In this embodiment, one end of the cross member 42c is fixed to the second member 43b, similar to the cross member 42b. In this embodiment, the cross member 42c has a columnar or cylindrical main body 43f extending horizontally from the support 42a (second member 43b) and a rotating part 43g provided at the tip of the main body 43f. The rotating part 43g has a through hole penetrating in the vertical direction. In this embodiment, the rotating part 43g is formed in a cylindrical shape. In the main body 43f, a through hole 43h penetrating in the vertical direction is formed so as to be located below the through hole 43e. In the long side direction of the work floor 12 (see FIG. 3), the distance between the center of the through hole 43h and the center of the work floor 12 is preferably smaller than the distance between the center of the through hole 43h and the axis of each of the pillars 40a, 42a. In this embodiment, the through hole 43h is positioned on the other side (the side of the pillars 44a, 46a) of the center of the cross member 42c in the long side direction of the work floor 12.

The vertical member 42d connects the horizontal member 42b and the horizontal member 42c. The diagonal member 42e connects the lower part of the second member 43b and the upper part of the vertical member 42d. When viewed from above, the horizontal member 42b and the horizontal member 42c are arranged to extend in the same direction from the support 42a.

As shown in FIG. 9, the support 44 has a similar configuration to the support 42. Therefore, the configuration of the support 44 will be briefly described below, but like the support 42, the support 44 has a support post 44a, horizontal members 44b and 44c, vertical members 44d, and diagonal members 44e. The support post 44a is supported by a caster 44f. As shown in FIG. 4, when the work scaffold 10 is in use, the corner 12c of the work floor 12 is supported by the support post 44a.

9, the support 44a has a first member 45a, a second member 45b, and a third member 45z. The cross member 44b has a main body portion 45c and a rotating portion 45d. A through hole 45e is formed in the main body portion 45c. The cross member 44c has a main body portion 45f and a rotating portion 45g. A through hole 45h is formed in the main body portion 45f so as to be located below the through hole 45e. As shown in FIG. 3, in the long side direction of the work floor 12, the distance d3 between the center of the through hole 45e and the center of the work floor 12 is preferably smaller than the distance d4 between the center of the through hole 45e and the axis of each support 44a, 46a. In this embodiment, in the long side direction of the work floor 12, the through hole 45e is positioned on one side (the support 40a, 42a side) of the center of the cross member 44b. Similarly, in the long side direction of the work floor 12, the distance between the center of the through hole 45h and the center of the work floor 12 is preferably smaller than the distance between the center of the through hole 45h and the axis of each of the pillars 44a, 46a. In this embodiment, in the long side direction of the work floor 12, the through hole 45h is positioned to one side (the side of the pillars 40a, 42a) of the center of the cross member 44c.

As shown in FIG. 10, the support 46 has the same configuration as the support 40. Therefore, the configuration of the support 46 will be briefly described below. The support 46 has a support 46a, horizontal members 46b, 46c, and 46d, and vertical members 46e and 46f. The support 46a is supported by a caster 46g. As shown in FIG. 4, when the work scaffold 10 is used, the corner 12d of the work floor 12 is supported by the support 46a. In this embodiment, the support 44a and 46a are arranged apart from each other in the short side direction and support the work floor 12 on the other side of the center of the work floor 12 in the long side direction, and the support 44a and 46a correspond to the second support.

As shown in FIG. 10, the support 46a has a first member 47a, a second member 47b, and a third member 47z. The cross member 46b has a main body portion 47c and a pivot portion 47d. A through hole 47e is formed in the main body portion 47c. The cross member 46c has a main body portion 47f and a pivot portion 47g. A through hole 47h is formed in the main body portion 47f so as to be located below the through hole 47e. The cross member 46d has a main body portion 47i and a pivot portion 47j. A through hole 47k is formed in the main body portion 47i so as to be located below the through holes 47e and 47h. As shown in FIG. 3, in the long side direction of the work floor 12, the distance between the center of each through hole 47e, 47h, 47k and the center of the work floor 12 is preferably smaller than the distance between the center of each through hole 47e, 47h, 47k and the axis of each support 44a, 46a. In this embodiment, in the long side direction of the work floor 12, the through holes 47e, 47h, 47k are positioned on one side (the support 40a, 42a side) of the centers of the cross members 46b, 46c, 46d.

As shown in FIG. 6, in the support unit 14a, the support 40 and the support 42 are arranged to cross each other so that the cross member 42b of the support 42 passes between the cross members 40b and 40c of the support 40, and the cross member 42c of the support 42 passes above the cross member 40d of the support 40. In this state, the connecting shaft 30 extending in the vertical direction is inserted into the through hole 41e of the cross member 40b, the through hole 43e of the cross member 42b, and the through hole 41h of the cross member 40c. In addition, the connecting shaft 32 extending in the vertical direction is inserted into the through hole 43h of the cross member 42c and the through hole 41k of the cross member 40d.

In this embodiment, the horizontal members 40b and 42b cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. The horizontal members 42b and 40c cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. The horizontal members 42c and 40d cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. In this embodiment, the horizontal members 40b, 40c, 40d, 42b, 42c, the vertical members 40e, 40f, 42d, and the diagonal member 42e constitute the first expansion section 48a.

In the support unit 14b, the support 44 and the support 46 are arranged to cross each other so that the cross member 44b of the support 44 passes between the cross member 46b and the cross member 46c of the support 46, and the cross member 44c of the support 44 passes above the cross member 46d of the support 46. In this state, the connecting shaft 34 extending in the vertical direction is inserted into the through hole 47e of the cross member 46b, the through hole 45e of the cross member 44b, and the through hole 47h of the cross member 46c. In addition, the connecting shaft 36 extending in the vertical direction is inserted into the through hole 45h of the cross member 44c and the through hole 47k of the cross member 46d.

In this embodiment, the horizontal members 46b and 44b cross each other in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. The horizontal members 44b and 46c cross each other in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. The horizontal members 44c and 46d cross each other in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. In this embodiment, the horizontal members 44b, 44c, 46b, 46c, 46d, the vertical members 44d, 46e, 46f, and the diagonal member 44e constitute the second expansion section 48b.

As described with reference to FIG. 3, in this embodiment, the distance between the center of each through hole 41e, 43e, 41h, 43h, 41k and the center of the work floor 12 in the long side direction of the work floor 12 is smaller than the distance between the center of each through hole 41e, 43e, 41h, 43h, 41k and the axis of each support 40a, 42a. Therefore, in this embodiment, the distance between the rotation center of each cross member 40b, 42b, 40c, 42c, 40d (axis of each connecting shaft 30, 32) and the center of the work floor 12 in the long side direction of the work floor 12 is smaller than the distance between the rotation center of each cross member 40b, 42b, 40c, 42c, 40d and the axis of each support 40a, 42a. In other words, in this embodiment, the swing center (connecting shafts 30, 32) of the first telescopic section 48a is positioned eccentrically in the long side direction from the center of the first telescopic section 48a to the other side (the support columns 44a, 46a side).

Similarly, in this embodiment, in the long side direction of the work floor 12, the distance between the rotation center of each cross member 46b, 44b, 46c, 44c, 46d (the axis of each connecting shaft 34, 36) and the center of the work floor 12 is smaller than the distance between the rotation center of each cross member 46b, 44b, 46c, 44c, 46d and the axis of each support 44a, 46a. In other words, in this embodiment, the swing center (connecting shaft 34, 36) of the second telescopic section 48b is positioned at a position eccentric to one side (the support 40a, 42a side) from the center of the second telescopic section 48b in the long side direction.

By configuring the first telescopic section 48a and the second telescopic section 48b in this manner, as shown in FIG. 11 described below, the length in the short side direction of the connection between the first telescopic section 48a and the second telescopic section 48b can be made shorter than the distance between the support posts 40a and 42a and the distance between the support posts 44a and 46a.

Although detailed description is omitted, the upper ends of the pillars 40a, 42a, 44a, and 46a are detachably attached to the work floor 12. In this embodiment, the third members 41z, 43z, 45z, and 47z are configured to be detachably attached to the work floor 12. When storing the work floor 12 as described below, the upper ends of the pillars 40a, 42a, 44a, and 46a (third members 41z, 43z, 45z, and 47z) are removed from the work floor 12. In this embodiment, when attaching the work floor 12 to the third members 41z, 43z, 45z, and 47z, the third members 41z, 43z, 45z, and 47z are fixed to the second members 41b, 43b, 45b, and 47b at the highest positions. On the other hand, when storing the work floor 12 (when removing the third members 41z, 43z, 45z, 47z from the work floor 12), the third members 41z, 43z, 45z, 47z are fixed to the second members 41b, 43b, 45b, 47b at the lowest position. In this embodiment, the height of the work floor 12 can be adjusted by adjusting the fixed height of the second members 41b, 43b, 45b, 47b relative to the first members 41a, 43a, 45a, 47a. In addition, the pillars 40a, 42a, 44a, 46a may be configured so that the height of the work floor 12 can be adjusted by adjusting the fixed height of the third members 41z, 43z, 45z, 47z relative to the second members 41b, 43b, 45b, 47b.

Next, a method for connecting the support units 14a and 14b will be described. In FIG. 11, (a) is a plan view of the work scaffold 10, and (b) is a front view of the work scaffold 10. Note that in FIG. 11, the work floor 12 is omitted from illustration in order to make it easier to understand the configuration of the work scaffold 10. FIG. 12 is a view of the connection portion 16 and its surroundings as seen from one side in the long side direction. Note that in FIG. 12, in order to simplify the drawing, only the rotating portions 41d, 41g, 43d, 45d, 47d, and 47g are shown among the components of the supports 40, 42, 44, and 46.

As shown in Figures 11 and 12, in this embodiment, a connecting shaft 50 extending in the vertical direction is inserted into the rotating part 41d of the support 40, the rotating part 45d of the support 44, and the rotating part 41g of the support 40. The rotating parts 41d, 45d, and 41g are connected so that they can rotate horizontally relative to each other with the connecting shaft 50 as the rotation axis. This allows the cross member 40b to rotate horizontally around the rotating part 41d, the cross member 44b to rotate horizontally around the rotating part 45d, and the cross member 40c to rotate horizontally around the rotating part 41g.

In addition, in this embodiment, a connecting shaft 52 extending in the vertical direction is inserted into the rotating part 47d of the support 46, the rotating part 43d of the support 42, and the rotating part 47g of the support 46. The rotating parts 47d, 43d, and 47g are connected so that they can rotate horizontally relative to each other with the connecting shaft 52 as the rotation axis. This allows the cross member 46b to rotate horizontally around the rotating part 47d, the cross member 42b to rotate horizontally around the rotating part 43d, and the cross member 46c to rotate horizontally around the rotating part 47g.

As shown in FIG. 11, a connecting shaft 54 extending in the vertical direction is inserted into the pivoting portion 43g of the horizontal member 42c and the pivoting portion 47j of the horizontal member 46d. The pivoting portion 43g and the pivoting portion 47j are connected so that they can rotate horizontally relative to each other with the connecting shaft 54 as the rotation axis. This allows the horizontal member 42c to rotate horizontally around the pivoting portion 43g, and the horizontal member 46d to rotate horizontally around the pivoting portion 47j. Similarly, referring to FIG. 6, a connecting shaft (not shown) extending in the vertical direction is inserted into the pivoting portion 45g of the horizontal member 44c and the pivoting portion 41j of the horizontal member 40d. The pivoting portion 45g and the pivoting portion 41j are connected so that they can rotate horizontally relative to each other with the connecting shaft as the rotation axis. This allows the cross member 44c to rotate horizontally around the pivot 45g, and the cross member 40d to rotate horizontally around the pivot 41j.

In this manner, support unit 14a and support unit 14b are connected. In this embodiment, support unit 14a and support unit 14b are connected so that connecting shaft 30 and connecting shaft 32 are positioned coaxially, and connecting shaft 34 and connecting shaft 36 are positioned coaxially. In this embodiment, support unit 14a and support unit 14b are connected so that connecting shaft 52 and connecting shaft 54 are positioned coaxially, and connecting shaft 50 and the connecting shaft inserted into rotating portions 41j and 45g are positioned coaxially.

Next, the connection portion 16 will be described. FIG. 13 is a diagram showing the A-A portion of FIG. 12. As shown in FIGS. 11 to 13, the connection portion 16 is provided to extend in the short side direction so as to connect the connecting shaft 50 and the connecting shaft 52. As shown in FIG. 12, in this embodiment, the connection portion 16 has a pair of first connection members 60 arranged at a distance from each other in the vertical direction, a pair of second connection members 62 arranged at a distance from each other in the vertical direction, and a pair of guide members 64 arranged at a distance from each other in the vertical direction.

The first connecting member 60 is provided so as to extend from the connecting shaft 50 toward the connecting shaft 52 side. In this embodiment, the first connecting member 60 has a first cylindrical portion 60a into which the connecting shaft 50 is inserted, and a second cylindrical portion 60b extending from the first cylindrical portion 60a toward the connecting shaft 52 side. The second cylindrical portion 60b opens toward the connecting shaft 52 side. In addition, through holes 60c are formed in the second cylindrical portion 60b on both sides in the long side direction so as to extend in the short side direction.

The second connection member 62 is provided so as to extend from the connecting shaft 52 toward the connecting shaft 50 side. In this embodiment, the second connection member 62 has a first cylindrical portion 62a into which the connecting shaft 52 is inserted, and a second cylindrical portion 62b extending from the first cylindrical portion 62a toward the connecting shaft 50 side. The second cylindrical portion 62b opens toward the connecting shaft 50 side. In addition, through holes 62c are formed on both sides in the long side direction of the second cylindrical portion 62b so as to extend in the short side direction.

The guide member 64 is provided so as to be movable relative to the first connecting member 60 and the second connecting member 62 in the short side direction. In this embodiment, the guide member 64 is formed in a columnar or cylindrical shape and is slidably inserted into the second cylindrical portions 60b, 62b.

A locking member 66a is provided at one end side (connecting shaft 50 side) of the guide member 64 so as to protrude from the guide member 64, and a locking member 66b is provided at the other end side (connecting shaft 52 side) of the guide member 64 so as to protrude from the guide member 64. The locking member 66a is provided so as to pass through the through hole 60c of the second cylindrical portion 60b, and the locking member 66b is provided so as to pass through the through hole 62c of the second cylindrical portion 62b. In this embodiment, the locking member 66a is locked to both ends of the short side direction of the through hole 60c, so that the movement range of the first connecting member 60 relative to the guide member 64 is restricted to a predetermined range, and the locking member 66b is locked to both ends of the short side direction of the through hole 62c, so that the movement range of the second connecting member 62 relative to the guide member 64 is restricted to a predetermined range. In this embodiment, the through hole 60c and the locking member 66a function as a first restriction mechanism that restricts the movement range of the first connection member 60 relative to the guide member 64 to a predetermined range, and the through hole 62c and the locking member 66b function as a second restriction mechanism that restricts the movement range of the second connection member 62 relative to the guide member 64 to a predetermined range. The movement range of the first connection member 60 and the second connection member 62 relative to the guide member 64 can be adjusted by adjusting the length of the through holes 60c and 62c in the short side direction.

In this embodiment, the upper second cylindrical portion 60b and the lower second cylindrical portion 60b are connected by a plurality of vertical members 68a, and the upper second cylindrical portion 62b and the lower second cylindrical portion 62b are connected by a plurality of vertical members 68b. Therefore, in this embodiment, the pair of first connecting members 60 can be moved integrally with respect to the guide member 64, and the pair of second connecting members 62 can be moved integrally with respect to the guide member 64. This makes it possible to prevent the first connecting member 60 and the second connecting member 62 from tilting with respect to the guide member 64, and allows the first connecting member 60 and the second connecting member 62 to be moved smoothly with respect to the guide member 64.

Next, the support mechanism 18 will be described. As shown in FIG. 3, the support mechanism 18 is supported by the connection portion 16 and supports the center portion of the work floor 12 in the long side direction. As shown in FIG. 11 to FIG. 13, in this embodiment, the support mechanism 18 is supported by a pair of guide members 64.

More specifically, the support mechanism 18 has a pair of plate-shaped fixed support parts 80 supported by a pair of guide members 64. Each fixed support part 80 is arranged so as to be sandwiched between the pair of guide members 64. In each fixed support part 80, a plate-shaped first rotation support part 82a is provided on one side of the center in the long side direction, and a plate-shaped second rotation support part 82b is provided on the other side of the center in the long side direction. The first rotation support part 82a and the second rotation support part 82b are each supported by the fixed support part 80 so as to be rotatable around a rotation axis extending in the short side direction.

As shown in Figures 11, 13, and 14, in this embodiment, the first pivot support part 82a is connected to the fixed support part 80 via a connecting shaft 84a extending in the short side direction, and rotates around the connecting shaft 84a as a rotation axis. The second pivot support part 82b is connected to the fixed support part 80 via a connecting shaft 84b extending in the short side direction, and rotates around the connecting shaft 84b as a rotation axis.

As shown in FIG. 14, a through hole 81a is formed in the fixed support part 80 near the connecting shaft 84a. A through hole 83a is formed in the first pivot support part 82a near the connecting shaft 84a. Similarly, a through hole 81b is formed in the fixed support part 80 near the connecting shaft 84b. A through hole 83b is formed in the second pivot support part 82b near the connecting shaft 84b.

As shown in FIG. 13, through holes 81a and 83a are formed so that they can overlap with each other when viewed from the short side direction. Similarly, through holes 81b and 83b are formed so that they can overlap with each other when viewed from the short side direction. Therefore, in this embodiment, by inserting a rod-shaped member (not shown) into through holes 81a and 83a, it is possible to prevent the first pivot support part 82a from rotating relative to the fixed support part 80. Similarly, by inserting a rod-shaped member (not shown) into through holes 81b and 83b, it is possible to prevent the second pivot support part 82b from rotating relative to the fixed support part 80.

Referring to FIG. 4 and FIG. 11, the pair of first pivot support parts 82a are fixed to the pair of connecting members 20b. As a result, the first bed part 20 rotates integrally with the first pivot support parts 82a relative to the fixed support part 80. In addition, the pair of second pivot support parts 82b are fixed to the pair of connecting members 22b. As a result, the second bed part 22 rotates integrally with the second pivot support parts 82b relative to the fixed support part 80.

As shown in FIG. 11, a pair of connecting members 70 extending in the long side direction are provided to connect a pair of supports 40a, 42a and a pair of supports 44a, 46a. In this embodiment, the connecting member 70 on one side in the short side direction is provided to connect the first member 41a of support 40a to the first member 45a of support 44a, and the connecting member 70 on the other side in the short side direction is provided to connect the first member 43a of support 42a (see FIG. 8) to the first member 47a of support 46a (see FIG. 10).

Figure 15 shows the connecting material 70, where (a) is a plan view and (b) is a front view. As shown in Figure 15, the connecting material 70 includes a first rod-shaped member 71a, a second rod-shaped member 71b, a first connecting member 71c, a second connecting member 71d, a locking member 71e, and a restricting member 71f.

Figure 16 shows the vicinity of the connection between the first rod-shaped member 71a and the first connecting member 71c, the vicinity of the connection between the first rod-shaped member 71a and the second rod-shaped member 71b, and the vicinity of the connection between the second rod-shaped member 71b and the second connecting member 71d of the connecting material 70, where (a) is a plan view and (b) is a front view. Figure 17 shows the first rod-shaped member 71a, where (a) is a plan view, (b) is a left side view, (c) is a front view, (d) is a right side view, and (e) is a bottom view. Figure 18 shows the second rod-shaped member 71b, where (a) is a plan view, (b) is a left side view, (c) is a front view, (d) is a right side view, and (e) is a bottom view. Note that the central portion of the first rod-shaped member 71a is omitted in Figures 17(a), (c), and (e), and the central portion of the second rod-shaped member 71b is omitted in Figures 18(a), (c), and (e).

As shown in Figures 16 and 17, the first rod-shaped member 71a has a cylindrical shape. A notch 700 is formed at the end of the first rod-shaped member 71a facing the first connecting member 71c. The notch 700 is formed at the upper part of the first rod-shaped member 71a. An arc-shaped slope 702 is formed at the end of the first rod-shaped member 71a facing the locking member 71e. The slope 702 is formed to face diagonally upward.

As shown in Figures 16 and 18, the second rod-shaped member 71b has a cylindrical shape. A notch 704 is formed at the end of the second rod-shaped member 71b on the second connecting member 71d side. The notch 704 is formed in the upper part of the second rod-shaped member 71b. An arc-shaped slope 706 is formed at the end of the second rod-shaped member 71b on the locking member 71e side. The slope 706 is formed to face diagonally upward.

As shown in FIG. 16, the first connecting member 71c includes a cylindrical rotating member 708 and a plate-shaped support member 710. The support member 710 is fixed to the outer peripheral surface of the rotating member 708. The support member 710 is provided so as to extend in the radial direction of the rotating member 708. Similarly, the second connecting member 71d includes a cylindrical rotating member 712 and a plate-shaped support member 714. The support member 714 is fixed to the outer peripheral surface of the rotating member 712. The support member 714 is provided so as to extend in the radial direction of the rotating member 712.

In this embodiment, the support member 710 of the first connecting member 71c is fitted into the notch 700 of the first rod-shaped member 71a. The first rod-shaped member 71a is connected to the support member 710 via the shaft member 800. As a result, the first rod-shaped member 71a is supported by the support member 710 so as to be swingable in the circumferential direction of the shaft member 800. Similarly, the support member 714 of the second connecting member 71d is fitted into the notch 704 of the second rod-shaped member 71b. The second rod-shaped member 71b is connected to the support member 714 via the shaft member 802. As a result, the second rod-shaped member 71b is supported by the support member 714 so as to be swingable in the circumferential direction of the shaft member 802. Various rod-shaped members such as bolts can be used as the shaft members 800 and 802. The same applies to the shaft members described below.

Figure 19 shows the locking member 71e and the restricting member 71f, where (a) is a front view and (b) is a right side view. As shown in Figures 16 and 19, the locking member 71e has a main body 716 with an inverted U-shaped cross section and a cylindrical support portion 718. In this embodiment, the main body 716 has a pair of side walls 716a, 716b and a top plate portion 716c that connects the upper ends of the pair of side walls 716a, 716b. The support portion 718 is fixed onto the top plate portion 716c at one end of the main body 716 in the longitudinal direction.

The restricting member 71f has an inverted U-shaped cross section. In this embodiment, the restricting member 71f is supported by the support portion 718 via the shaft member 804 so as to be able to swing. More specifically, the restricting member 71f is supported by the support portion 718 so as to be able to swing in the circumferential direction of the shaft member 804.

As shown in FIG. 16, the end of the first rod-shaped member 71a and the end of the second rod-shaped member 71b are fitted into the main body 716 of the locking member 71e. In this embodiment, the first rod-shaped member 71a is connected to the main body 716 via the shaft member 806. As a result, the first rod-shaped member 71a is supported by the main body 716 so as to be swingable in the circumferential direction of the shaft member 806. Similarly, the second rod-shaped member 71b is connected to the main body 716 via the shaft member 808. As a result, the second rod-shaped member 71b is supported by the main body 716 so as to be swingable in the circumferential direction of the shaft member 808. With this configuration, the first rod-shaped member 71a and the second rod-shaped member 71b can rotate up and down relative to the locking member 71e.

Figure 20 is a diagram for explaining the relationship between the support 40a and the connecting material 70, where (a) is a front view showing the support 40a, the caster 40g, and a part of the connecting material 70, and (b) is a diagram showing part b-b of (a). Note that in Figure 20(b), the caster 40g is omitted from the illustration to avoid cluttering the drawing.

As shown in FIG. 20, the rotating member 708 is fitted into the first member 41a so that the first member 41a of the support 40a passes through the rotating member 708 of the first connecting member 71c. The rotating member 708 is provided so as not to move vertically relative to the support 40a. Specifically, in this embodiment, the rotating member 708 is supported from below by the caster 40g, so that the rotating member 708 is restricted from moving downward relative to the support 40a. In addition, the rotating member 708 is restricted from moving upward relative to the support 40a by the restricting member 41y provided on the outer circumferential surface of the first member 41a. With this configuration, the first rod-shaped member 71a is connected to the support 40a via the first connecting member 71c so as to be able to rotate vertically relative to the support 40a.

In this embodiment, the rotating member 708 is fitted to the first member 41a so that it can rotate horizontally around the support 40a (first member 41a). This allows the first rod-shaped member 71a and the support 40a (first member 41a) to rotate horizontally relative to each other, as shown in FIG. 21.

Referring to FIG. 11(b), the second connecting member 71d and the support pillar 44a are connected in a manner similar to the connection between the first connecting member 71c and the support pillar 40a described above, but detailed description will be omitted. That is, the second rod-shaped member 71b is connected to the support pillar 44a via the second connecting member 71d so that it can rotate up and down relative to the support pillar 44a. In addition, the second rod-shaped member 71b and the support pillar 44a can rotate horizontally relative to each other.

In addition, in this embodiment, the first rod-shaped member 71a and the second rod-shaped member 71b can rotate vertically relative to the locking member 71e at the center of the connecting member 70 in the long side direction. As a result, as shown in FIG. 22, the connecting member 70 on one side in the short side direction can bend upward between the support 40a and the support 44a.

Although detailed explanation is omitted, the connecting material 70 arranged on the other side in the short side direction and the pair of supports 42a, 46a are connected in a manner similar to the connection between the connecting material 70 arranged on one side in the short side direction and the pair of supports 40a, 44a. Therefore, the connecting material 70 on the other side in the short side direction can also bend upward between the supports 42a and 46a.

Referring to FIG. 16, in this embodiment, the center of the long side of the connecting material 70 is prevented from bending downward by the locking member 71e provided at the center of the connecting material 70 being locked to the first rod-shaped member 71a and the second rod-shaped member 71b. Furthermore, in this embodiment, the end of the first rod-shaped member 71a on the first connecting member 71c side contacts the support member 710 from below, and the end of the second rod-shaped member 71b on the second connecting member 71d side contacts the support member 714 from below, thereby reliably preventing the center of the long side of the connecting material 70 from bending downward. This allows the distance in the long side direction between the pillars 40a, 42a and the pillars 44a, 46a to be appropriately maintained when the work scaffold 10 is in use.

(Effects of working scaffolding)
In the work scaffold 10 according to this embodiment, the pair of supports 40a, 42a and the pair of supports 44a, 46a are connected via a first telescopic section 48a and a second telescopic section 48b. The first telescopic section 48a and the second telescopic section 48b are each configured to be telescopic in the long side direction. The first telescopic section 48a has a plurality of cross members that are crossed in an X-shape when viewed from above and are connected to be rotatable in the horizontal direction. Similarly, the second telescopic section 48b has a plurality of cross members that are crossed in an X-shape when viewed from above and are connected to be rotatable in the horizontal direction.

With this configuration, in the work scaffolding 10 of this embodiment, as shown in Figures 11 and 22, as the pair of supports 40a, 42a and the pair of supports 44a, 46a approach each other in the long side direction, the cross members 40b, 40c and cross member 42b rotate horizontally relative to each other around the connecting axis 30 (not shown in Figure 22(b)), and the cross members 42c and 40d rotate horizontally relative to each other around the connecting axis 32 (see Figure 11(b); not shown in Figure 22(b)), so that the dimension of the first expansion section 48a in the long side direction becomes smaller. Additionally, to reduce the dimension of the long side of the second expandable section 48b, the cross members 46b, 46c and the cross member 44b rotate horizontally relative to each other around the connecting shaft 34 (not shown in FIG. 22(b)), and the cross members 44c and 46d rotate horizontally relative to each other around the connecting shaft 36 (see FIG. 11(b) and not shown in FIG. 22(b)).

On the other hand, as the pair of supports 40a, 42a and the pair of supports 44a, 46a move apart in the long side direction, the cross members 40b, 40c and the cross member 42b rotate horizontally around the connecting shaft 30, and the cross members 42c and 40d rotate horizontally around the connecting shaft 32, so that the dimension of the long side direction of the first telescopic section 48a increases. Also, the cross members 46b, 46c and the cross member 44b rotate horizontally around the connecting shaft 34, and the cross members 44c and 46d rotate horizontally around the connecting shaft 36, so that the dimension of the long side direction of the second telescopic section 48b increases.

As described above, in the work scaffold 10 according to this embodiment, the distance in the long side direction between the posts 40a, 42a and the posts 44a, 46a can be reduced by rotating the multiple cross members of the first telescopic section 48a and the second telescopic section 48b in the horizontal direction. In this case, compared to the case where multiple cross members are rotated in the vertical direction, it is possible to prevent the bending force described in FIG. 2 from being applied to each cross member. This allows the work scaffold 10 to be folded smoothly.

In addition, in the work scaffold 10 according to this embodiment, the first telescopic section 48a, which is configured to be extendable, and the second telescopic section 48b, which is configured to be extendable, are arranged side by side in the long side direction, so that the dimension of the work scaffold 10 in the long side direction can be made sufficiently small. In addition, in this embodiment, the first telescopic section 48a and the second telescopic section 48b are configured by connecting multiple horizontal members in the long side direction, so that the length of each horizontal member can be made short. This makes it possible to prevent the dimension of the work scaffold 10 in the short side direction from becoming large when the work scaffold 10 is folded.

In addition, in this embodiment, as the pair of supports 40a, 42a and the pair of supports 44a, 46a approach each other in the long side direction, the connecting material 70 bends so that the center in the long side direction moves upward, and the length in the long side direction becomes shorter. Also, as the pair of supports 40a, 42a and the pair of supports 44a, 46a move away from each other in the long side direction, the connecting material 70 extends so that the center in the long side direction moves downward, and the length in the long side direction becomes longer. In this way, in this embodiment, the pair of connecting materials 70 can be bent or extended according to the change in the dimension in the long side direction of the work scaffold 10. In other words, the dimension in the long side direction of the pair of connecting materials 70 can be changed according to the change in the dimension in the long side direction of the work scaffold 10. In this case, the work scaffold 10 can be folded or unfolded without removing the pair of connecting materials 70 from the work scaffold 10, improving work efficiency.

In addition, in this embodiment, the pair of connecting members 70 are located outside the connection portion between the first telescopic section 48a and the second telescopic section 48b (in this embodiment, the rotating sections 41d, 41g, 41j, 43d, 43g, 45d, 45g, 47d, 47g, 47j) in the short side direction. In this case, when the pair of connecting members 70 are bent, the pair of connecting members 70 can be prevented from contacting the connection portion between the first telescopic section 48a and the second telescopic section 48b. This makes it possible to move the center portion of the connecting member 70 to a sufficiently high position when bending the pair of connecting members 70, and to sufficiently shorten the length of the pair of connecting members 70 in the long side direction. Therefore, it becomes possible to bring the pair of supports 40a, 42a and the pair of supports 44a, 46a sufficiently close to each other in the long side direction, and it becomes possible to fold the work scaffolding 10 small.

In addition, in this embodiment, the pillars 40a, 42a, 44a, and 46a are connected to a pair of connecting members 70 so that they can rotate horizontally relative to the pair of connecting members 70. This allows the pillars 40a, 42a, 44a, and 46a to rotate relative to the pair of connecting members 70 when folding and unfolding the work scaffolding 10. As a result, the work scaffolding 10 can be folded and unfolded smoothly.

When storing the work floor 12 of the work scaffold 10, first, the connections between the supports 40a, 42a, 44a, and 46a and the work floor 12 are released. At this time, the first rotating support part 82a and the second rotating support part 82b are made unable to rotate relative to the fixed support part 80. In other words, the top surface of the first floor part 20 (the surface that is stepped on by the worker when the work scaffold 10 is in use) faces upward, and the top surface of the second floor part 22 (the surface that is stepped on by the worker when the work scaffold 10 is in use) maintains a state of facing upward.

Next, as shown in FIG. 23(a), the distance between the columns 40a, 42a and the columns 44a, 46a in the long side direction is reduced. Here, the support mechanism 18 supporting the center of the long side direction of the work floor 12 is supported by the connection part 16. The connection part 16 is provided at the connection part between the first extension part 48a and the second extension part 48b, so the position of the connection part 16 is the middle position between the columns 40a, 42a and the columns 44a, 46a. With this configuration, when the columns 40a, 42a and the columns 44a, 46a are reduced, the work floor 12 can be prevented from moving to a position biased to one side or the other side in the long side direction relative to the columns 40a, 42a, 44a, 46a. This allows the work scaffold 10 to be folded smoothly.

In addition, in this embodiment, the support mechanism 18 is supported by a guide member 64 (see FIG. 11(a)) of the connection portion 16. The guide member 64 is disposed in the center of the connecting shaft 50 and the connecting shaft 52, so that the position of the support mechanism 18 can be smoothly positioned in the center of the connecting shaft 50 and the connecting shaft 52. This makes it possible to prevent the work floor 12 from moving to a position biased to one side or the other in the short side direction relative to the supports 40a, 42a, 44a, 46a when the supports 40a, 42a and the supports 44a, 46a are brought closer to each other.

Finally, as shown in FIG. 23(b), the first pivoting support 82a and the second pivoting support 82b are brought into a state in which they can rotate relative to the fixed support 80, and the first floor 20 and the second floor 22 are rotated outward in the long side direction. This completes the storage of the work floor 12. Note that FIG. 23 shows the work scaffold 10 in a state in which the distance in the long side direction between the pillars 40a, 42a and the pillars 44a, 46a is minimized.

When folding the work scaffolding 10, first, while bringing the support 40a and the support 44a closer to each other, the center of the connecting material 70 between the support 40a and the support 44a is slightly bent upward as shown in FIG. 24. In this state, the restricting member 71f is rotated relative to the locking member 71e, and the restricting member 71f is inserted between the locking member 71e (main body 716) and the second rod-shaped member 71b. This prevents the first rod-shaped member 71a and the second rod-shaped member 71b from rotating relative to each other so that the locking member 71e moves downward. In other words, the bent state of the connecting material 70 is maintained. Next, while bringing the support 42a and the support 46a closer to each other, the center of the connecting material 70 between the support 42a and the support 46a is bent in the same way as the connecting material 70 between the support 40a and the support 44a. Then, the pair of ties 70 are bent simultaneously by bringing the supports 40a, 42a and the supports 44a, 46a closer to each other. In this way, in this embodiment, one of the ties 70 can be bent while maintaining the other ties 70 in a bent state. In this case, since it is not necessary to simultaneously start the bending operation of the pair of ties 70, the work scaffolding 10 can be easily folded by one person. Note that the structure of the restricting member for maintaining the bent state of the ties 70 is not limited to the above example. For example, a pin may be used as the restricting member, and the bent state of the ties 70 may be maintained by inserting the pin between the locking member 71e (main body 716) and the second rod-shaped member 71b.

When the work scaffold 10 with the work floor 12 stored is to be used at a work site, first, the first floor section 20 and the second floor section 22 are rotated to place the work floor 12 in the state shown in FIG. 23(a). After that, the distance in the long side direction between the supports 40a, 42a and the supports 44a, 46a is increased, and the supports 40a, 42a, 44a, 46a are attached to the corners 12a to 12d of the work floor 12 as shown in FIG. 4.

When the work scaffolding 10 is used, as shown in FIG. 5, the support pillars 40a and 42a are connected by a connecting material 72. Similarly, the support pillars 44a and 46a are connected by a connecting material 72. This makes it possible to fix the distance in the short side direction between the support pillars 40a, 44a and the support pillars 42a, 46a.

In this embodiment, as shown in FIG. 25, when the work scaffold 10 is folded, the distance between the connecting shaft 50 and the connecting shaft 52 in the short side direction increases. As a result, the first connecting member 60 and the second connecting member 62 move toward the outside in the short side direction relative to the guide member 64. On the other hand, when the folded work scaffold 10 is unfolded again, as shown in FIG. 12, the distance between the connecting shaft 50 and the connecting shaft 52 decreases. As a result, the first connecting member 60 and the second connecting member 62 move toward the inside in the short side direction relative to the guide member 64.

Here, in this embodiment, the movement range of the first connection member 60 and the second connection member 62 relative to the guide member 64 is restricted to a predetermined range by the through holes 60c, 62c and the locking members 66a, 66b. Specifically, as shown in FIG. 25, the locking members 66a, 66b contact the inner edges of the through holes 60c, 62c in the short side direction, thereby restricting the first connection member 60 and the second connection member 62 from moving outward in the short side direction relative to the guide member 64. On the other hand, as shown in FIG. 12, the locking members 66a, 66b contact the outer edges of the through holes 60c, 62c in the short side direction, thereby restricting the first connection member 60 and the second connection member 62 from moving inward in the short side direction relative to the guide member 64.

In this embodiment, when the locking members 66a, 66b are in contact with the outer edges of the through holes 60c, 62c in the short side direction, the support mechanism 18 is located in the center between the connecting shaft 50 and the connecting shaft 52, and when the locking members 66a, 66b are in contact with the inner edges of the through holes 60c, 62c in the short side direction, the length and position of the through holes 60c, 62c and the position of the locking members 66a, 66b are adjusted so that the support mechanism 18 is located in the center between the connecting shaft 50 and the connecting shaft 52. This allows the support mechanism 18 to be positioned in the center of the working scaffold 10 in the short side direction when the working scaffold 10 is folded and unfolded. As a result, the working floor 12 can be smoothly positioned in an appropriate position.

(Modification of the connecting material)
Fig. 26 is a diagram showing another example of the connecting material 70. The connecting material 70 shown in Fig. 26 differs from the above-described connecting material 70 in that the connecting material 70 includes a first rod-shaped member 73a instead of the first rod-shaped member 71a (see Fig. 16), a second rod-shaped member 73b instead of the second rod-shaped member 71b (see Fig. 16), and a locking member 73e instead of the locking member 71e (see Fig. 16) and the restricting member 71f (see Fig. 16).

Although details will be described later, the first rod-shaped member 73a differs from the first rod-shaped member 71a (see FIG. 16) in the structure of the end portion on the locking member 73e side. The second rod-shaped member 73b has a cylindrical main body 731 and a plate-shaped connecting member 732. The locking member 73e has an inverted U-shaped cross section, similar to the main body 716 of the locking member 71e described above.

27 shows the first rod-shaped member 73a and the second rod-shaped member 73b, where (a) is a plan view, (b) is a front view, and (c) is a bottom view. The end of the first rod-shaped member 73a on the first connecting member 71c (see FIG. 26) side has a similar configuration to the end of the first rod-shaped member 71a (see FIG. 16) on the first connecting member 71c side, and the end of the main body 731 on the second connecting member 71d (see FIG. 26) side has a similar configuration to the end of the second rod-shaped member 71b (see FIG. 16) on the second connecting member 71d side. Therefore, in FIG. 27, the end of the first rod-shaped member 73a on the first connecting member 71c side and the end of the main body 731 on the second connecting member 71d side are omitted.

27, a notch 720 is formed in the end of the first rod-shaped member 73a on the side of the locking member 73e (see FIG. 26). The notch 720 is formed in the lower part of the first rod-shaped member 73a. In the second rod-shaped member 73b, a connecting member 732 is fixed to the end of the locking member 73e (see FIG. 26) of the main body 731. With reference to FIG. 26 and FIG. 27, in this embodiment, the connecting member 732 of the second rod-shaped member 73b is fitted into the notch 720 of the first rod-shaped member 73a. In this state, as shown in FIG. 26, the connecting member 732 is connected to the first rod-shaped member 73a and the locking member 73e via the shaft member 810.

In this embodiment, the first rod-shaped member 73a is fixed to the locking member 73e. The connecting member 732 is provided so as to be rotatable in the circumferential direction of the shaft member 810 with respect to the first rod-shaped member 73a and the locking member 73e. This allows the central portion of the long side of the connecting material 70 to bend upward as shown in FIG. 28. In this embodiment, as shown in FIG. 26, the main body 731 comes into contact with the locking member 73e from below, thereby preventing the central portion of the long side of the connecting material 70 from bending downward. Although not shown, it is preferable to provide a restricting member for maintaining the bent state of the connecting material 70 in this embodiment as well.

29 is a diagram showing another example of the first connecting member 71c, (a) being a front view, and (b) being a right side view. The first connecting member 71c shown in FIG. 29 is different from the first connecting member 71c (see FIG. 16) described above in that it is provided with a support member 740 having a U-shaped cross section instead of the plate-shaped support member 710. In this embodiment, as shown in FIG. 30, the first rod-shaped member 71a is connected to the support member 740 via the shaft member 800 in a state where it is fitted into the support member 740. As a result, the first rod-shaped member 71a is supported by the support member 740 so as to be swingable in the circumferential direction of the shaft member 800. In this embodiment, the end of the first rod-shaped member 71a on the support member 740 side is beveled to have a slope 750 facing diagonally downward. As a result, when the rod-shaped member 71a rotates upward relative to the support member 740, it is possible to prevent the first rod-shaped member 71a from contacting the bottom surface of the support member 740. As a result, the connecting material can be bent smoothly. In addition, in this embodiment, the first rod-shaped member 71a contacts the bottom surface of the support member 740 from above, thereby restricting the first rod-shaped member 71a from rotating downward relative to the support member 740. This makes it possible to prevent the connecting material from bending downward. Although a detailed description is omitted, the second connecting member 71d may also be configured similarly to the first connecting member 71c in FIG. 29. In this case, it is preferable that the end of the second rod-shaped member 71b on the second connecting member 71d side is beveled to have a slope similar to the slope 750 described above.

Other Embodiments
In the above embodiment, the first telescopic section 48a and the second telescopic section 48b each have a plurality of pairs of cross members crossing in an X-shape, but each of the first telescopic section and the second telescopic section only needs to have at least a pair of cross members crossing in an X-shape. Therefore, each telescopic section may be composed of a pair of cross members crossing in an X-shape. Specifically, in the above-mentioned working scaffold 10, for example, the cross members 40c, 40d, 42c, 46c, 44c, 46d may not be provided, the cross members 40b, 40d, 42c, 46b, 44c, 46d may not be provided, the vertical members 40e, 40f, 42d, 44d, 46e, 46f may not be provided, and the diagonal members 42e, 44e may not be provided. In addition, when each telescopic section is composed of three or more horizontal members, at least two of the horizontal members may be connected to each other so as to cross in an X-shape when viewed from above and to be rotatable in the horizontal direction. Therefore, when each telescopic section is composed of three or more horizontal members, two horizontal members and one other horizontal member may be connected to each other so as to cross in an X-shape when viewed from above and to be rotatable in the horizontal direction, as in the relationship between the horizontal members 40b, 40c and the horizontal member 42b described above.

As shown in FIG. 31, the connection portion 16 may further include an elastic member 74 that applies a force to the first connection member 60 and the second connection member 62 in a direction that brings them closer together. In this case, when the work scaffolding 10 is expanded, the distance between the connecting shaft 50 and the connecting shaft 52 can be easily reduced. In other words, the dimensions of the long sides of the first telescopic portion 48a and the second telescopic portion 48b can be easily increased. As a result, the work scaffolding 10 can be easily expanded.

11 and 12, in the above embodiment, the pivoting parts 41d and 41g of the support 40 and the pivoting part 45d of the support 44 are connected by a common connecting shaft 50, and the pivoting part 43d of the support 42 and the pivoting parts 47d and 47g of the support 46 are connected by a common connecting shaft 52. However, the method of connecting the support units 14a and 14b is not limited to the above example. For example, as shown in FIG. 32, the support units 14a and 14b may be connected to each other via a plurality of connecting members 90 and a plurality of connecting shafts 92 provided at both ends of each connecting member 90.

In the above embodiment, the through holes 60c, 62c and the locking members 66a, 66b are used to configure the first and second restriction mechanisms that restrict the movement of the first connecting member 60 and the second connecting member 62 relative to the guide member 64. However, the first and second restriction mechanisms are not limited to the above example, and various known configurations can be used. For example, the first restriction mechanism may be configured as shown in FIG. 33. The configuration shown in FIG. 33 will be briefly described below.

In FIG. 33, (a) shows the second cylindrical portion 60b of the first connecting member 60 and the guide member 64, (b) is a schematic diagram showing the b-b portion of (a), and (c) is a schematic diagram showing the c-c portion of (a).

In the example shown in FIG. 33, a pair of locking members 76a, 76b are attached to the second cylindrical portion 60b of the first connecting member 60 so as to protrude inward. The upper portion of the guide member 64 has a shape that is recessed downward so as to avoid the locking member 76a. A substantially L-shaped locking member 78 is fixed to the end of the guide member 64. In this embodiment, the locking members 76a, 76b are locked to the locking member 78, thereby restricting the movement of the first connecting member 60 relative to the guide member 64. That is, in this embodiment, the locking members 76a, 76b, 78 function as a first restricting mechanism. Although a detailed description is omitted, the second restricting mechanism can be configured in a similar manner.

Also, as shown in FIG. 34, the support columns 40a and 42a may be connected by a plurality of expandable connecting members 94. In FIG. 34, (a) is a left side view of the work scaffold when in use, and (b) is a left side view of the work scaffold when folded. In FIG. 34, most of the components of the work scaffold 10 have been omitted to avoid cluttering the drawing.

As shown in FIG. 34, the connecting member 94 includes a columnar or cylindrical inner member 94a and a cylindrical outer member 94b. One end of the inner member 94a is fixed to the support 40a, and one end of the outer member 94b is fixed to the support 42a. The inner member 94a is inserted into the outer member 94b so as to be slidable in the axial direction of the outer member 94b. In this embodiment, one connecting member 94 is provided to connect the first member 41a of the support 40a to the first member 43a of the support 42a, and another connecting member 94 is provided to connect the second member 41b of the support 40a to the second member 43b of the support 42a. Although not shown, a pair of connecting members 94 is also provided between the support 44a (see FIG. 11) and the support 46a (see FIG. 11). In this embodiment, as shown in FIG. 34(a), the overall length of the tether 94 can be shortened when the work scaffold 10 is in use, and as shown in FIG. 34(b), the overall length of the tether 94 can be lengthened when the work scaffold 10 is folded. This eliminates the need to attach and remove the tether 94 when unfolding and folding the work scaffold 10, improving work efficiency.

In the work scaffold 10 shown in FIG. 5, one connecting member 72 is provided between the support columns 40a and 42a, and between the support columns 44a and 46a. However, as in the work scaffold 10 shown in FIG. 34, multiple connecting members 72 may be provided between the support columns 40a and 42a, and between the support columns 44a and 46a.

In the work scaffold 10 shown in FIG. 11, a pair of diagonal members (not shown) may be provided to connect the lower part of the support 40a, 42a to the first telescopic part 48a, and a pair of diagonal members (not shown) may be provided to connect the lower part of the support 44a, 46a to the second telescopic part 48b. In this case, for example, as shown in FIG. 35, a diagonal member 96 is provided to connect the first member 41a to the vertical member 40f in the support 40, and as shown in FIG. 36, a diagonal member 98 is provided to connect the first member 45a to the horizontal member 44c in the support 44. A stopper 96a is provided at the tip of the diagonal member 96 to prevent the diagonal member 96 from falling out of the holding member 97 described later. Similarly, a stopper 98a is provided at the tip of the diagonal member 98 to prevent the diagonal member 98 from falling out of the holding member 99 described later. For example, a rivet or a bolt can be used as the stopper 96a, 98a. Although not shown, a diagonal member is provided in the support 42 (see FIG. 8) to connect the first member 43a and the horizontal member 42c, similar to the diagonal member 98 in the support 44, and a diagonal member is provided in the support 46 (see FIG. 10) to connect the first member 47a and the vertical member 46f, similar to the diagonal member 96 in the support 40. In addition, in FIG. 35, (a) shows a state in which the second member 41b is fixed to the first member 41a at the lowest position, and (b) shows a state in which the second member 41b is fixed to the first member 41a at the highest position. Similarly, in FIG. 36, (a) shows a state in which the second member 45b is fixed to the first member 45a at the lowest position, and (b) shows a state in which the second member 45b is fixed to the first member 45a at the highest position.

As described above, by providing a pair of diagonal members to connect the first members 41a, 43a and the first telescopic section 48a, and by providing a pair of diagonal members to connect the first members 45a, 47a and the second telescopic section 48b, it is possible to sufficiently prevent the work scaffold 10 from shaking in the long side direction.

As shown in FIG. 35, in the support 40, the first member 41a supports one end of the diagonal member 96 so that the diagonal member 96 can swing up and down, and the first telescopic section 48a (vertical member 40f in this embodiment) supports the diagonal member 96 so that the diagonal member 96 can advance and retreat in the axial direction of the diagonal member 96 relative to the first telescopic section 48a (see FIG. 11). The vertical member 40f also supports the diagonal member 96 via a cylindrical holding member 97 that is supported by the vertical member 40f so that it can swing. With this configuration, the diagonal member 96 can be smoothly advanced and retreated relative to the first telescopic section 48a, and the height of the support 40 can be smoothly adjusted.

As shown in FIG. 36, in the support 44, the first member 45a supports one end of the diagonal member 98 so that the diagonal member 98 can swing up and down, and the second telescopic section 48b (in this embodiment, the cross member 44c) supports the diagonal member 98 so that the diagonal member 98 can advance and retreat in the axial direction of the diagonal member 98 relative to the second telescopic section 48b (see FIG. 11). In addition, the cross member 44c supports the diagonal member 98 via a cylindrical holding member 99 that is supported by the cross member 44c so that it can swing. With this configuration, the diagonal member 98 can be smoothly advanced and retreated relative to the second telescopic section 48b, and the height of the support 44 can be smoothly adjusted.

Although not shown, in the same manner as the diagonal member 96 in the support 40, in the support 46 (see FIG. 10), the diagonal member is supported by the first member 47a so as to be able to swing up and down, and is supported by the second telescopic section 48b (in this embodiment, the vertical member 46f) so as to be able to advance and retreat in the axial direction relative to the second telescopic section 48b (see FIG. 11). Also, in the same manner as the diagonal member 98 in the support 44, in the support 42 (see FIG. 8), the diagonal member is supported by the first member 43a so as to be able to swing up and down, and is supported by the first telescopic section 48a (in this embodiment, the horizontal member 42c) so as to be able to advance and retreat in the axial direction relative to the first telescopic section 48a (see FIG. 11).

In the above example, the diagonal member 96 is connected to the vertical member 40f in the support 40, and the diagonal member (not shown) is connected to the horizontal member 42c in the support 42. However, the portion to which the first diagonal member is connected in the first telescopic section 48a is not limited to the above example. Specifically, the first diagonal member may be connected to other components (e.g., horizontal members 40c, 40d, etc.) constituting the first telescopic section 48a among the components of the support 40, and the first diagonal member may be connected to other components (e.g., vertical member 42d, diagonal member 42e, etc.) constituting the first telescopic section 48a in the support 42.

In the above example, the diagonal member 98 is connected to the horizontal member 44c in the support 44, and the diagonal member (not shown) is connected to the vertical member 46f in the support 46. However, the portion to which the second diagonal member is connected in the second telescopic section 48b is not limited to the above example. Specifically, the second diagonal member may be connected to other components (e.g., vertical member 44d, diagonal member 44e, etc.) constituting the second telescopic section 48b among the components of the support 44, and the second diagonal member may be connected to other components (horizontal members 46c, 46d, etc.) constituting the second telescopic section 48b in the support 46.

As shown in FIG. 37, an expandable diagonal member 200 may be provided between the support pillars 40a and 42a. In FIG. 37, (a) shows the state in which the height of the work scaffold 10 is lowered, and (b) shows the state in which the height of the work scaffold 10 is increased. In FIG. 37, most of the components of the work scaffold 10 have been omitted to avoid cluttering the drawing.

As shown in FIG. 37, the diagonal member 200 is provided between the support 40a and the support 42a so as to extend in the short side direction. In this embodiment, the diagonal member 200 includes a columnar or cylindrical inner member 200a and a cylindrical outer member 200b. The inner member 200a is inserted into the outer member 200b so as to be slidable in the axial direction of the outer member 200b. One end of the diagonal member 200 (in this embodiment, one end of the inner member 200a) is supported by the second members 41b and 43b via a connecting member 94 that connects the second members 41b and 43b. The other end of the diagonal member 200 (in this embodiment, one end of the outer member 200b) is supported by the first members 41a and 43a via a connecting member 94 that connects the first members 41a and 43a. Although not shown in the figure, in this embodiment, a diagonal member 200 is also provided between the support pillar 44a (see FIG. 11) and the support pillar 46a (see FIG. 11) so as to extend in the short side direction.

As described above, by providing diagonal members 200 between columns 40a and 42a and between columns 44a and 46a, the work scaffolding 10 can be sufficiently prevented from swaying in the short side direction.

In this embodiment, one end of the diagonal member 200 is supported by the connecting member 94 so that it can swing up and down. Similarly, the other end of the diagonal member 200 is supported by the connecting member 94 so that it can swing up and down. With this configuration, the overall length of the diagonal member 200 can be smoothly shortened when the height of the work scaffold 10 is lowered, and the overall length of the diagonal member 200 can be smoothly lengthened when the height of the work scaffold 10 is increased. This allows the height of the work scaffold 10 to be smoothly adjusted.

It is sufficient that the diagonal member 200 between the support pillars 40a and 42a has one end (upper end) supported by at least one of the second members of the support pillars 40a and 42a so as to be swingable in the vertical direction, and the other end (lower end) supported by at least the other of the first members of the support pillars 40a and 42a so as to be swingable in the vertical direction. Therefore, for example, one end (upper end) of the diagonal member 200 may be directly supported by the second member 43b, and the other end (lower end) of the diagonal member 200 may be directly supported by the first member 41a. Also, one end of the diagonal member 200 may be directly supported by the second member 41b, and the other end of the diagonal member 200 may be directly supported by the first member 43a. Although detailed explanation will be omitted, the diagonal member 200 between the support pillars 44a and 46a should be supported at one end (upper end) so as to be swingable in the vertical direction by at least one second member of the support pillars 44a and 46a, and at the other end (lower end) so as to be swingable in the vertical direction by at least the other first member of the support pillars 44a and 46a.

The present invention provides a work platform that can be folded smoothly and has a small dimension in the long side direction.

REFERENCE SIGNS LIST 10 Working scaffold 12 Working floor 14a, 14b Support unit 16 Connection portion 18 Support mechanism 20 First floor portion 20a Frame body 20b Connecting member 22 Second floor portion 22a Frame body 22b Connecting member 30, 32, 34, 36 Connecting shaft 40, 42, 44, 46 Support body 40a, 42a, 44a, 46a Support column 40g, 42f, 44f, 46g Caster 40b, 40c, 40d, 42b, 42c, 44b, 44c, 46b, 46c, 46d Cross member 41d, 41g, 41j, 43d, 43g, 45d, 45g, 47d, 47g, 47j Rotating portion 48a First telescopic portion 48b Second telescopic portion 50, 52, 54 Connecting shaft 60 First connecting member 60a First tubular portion 60b Second tubular portion 60c Through hole 62 Second connecting member 62a First tubular portion 62b Second tubular portion 62c Through hole 64 Guide member 66a, 66b Locking member 68a, 68b Vertical member 70, 72 Connecting member 74 Elastic member 76a, 76b, 78 Locking member 80 Fixed support portion 81a, 81b Through hole 82a First pivot support portion 82b Second pivot support portion 83a, 83b Through hole 84a, 84b Connecting shaft 90 Connecting member 92 Connecting shaft 94 Connecting member 96, 98, 200 Diagonal member

Claims (10)

A rectangular work platform;
A pair of first supports arranged apart from each other in the short side direction of the work floor, supporting the work floor on one side of the center of the work floor in the long side direction of the work floor, and supported by casters each provided to be rotatable;
A pair of second supports arranged apart from each other in the short side direction and supporting the work floor on the other side of the center of the work floor in the long side direction, each supported by a rotatable caster;
A first telescopic section provided on one side of the center of the work floor in the long side direction and connected to the pair of first pillars;
A second telescopic section is provided on the other side of the center of the work floor in the long side direction and is connected to the first telescopic section and the pair of second pillars;
a pair of connecting members extending in the long side direction so as to connect the pair of first pillars and the pair of second pillars;
The first telescopic portion has a pair of first cross members that cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in a horizontal direction,
The second telescopic portion has a pair of second cross members that cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in a horizontal direction,
One of the pair of connecting members connects the first support pillar and the second support pillar on one side in the short side direction, and the other of the pair of connecting members connects the first support pillar and the second support pillar on the other side in the short side direction,
A work scaffolding in which each of the pair of connecting members is provided so as to be bent upward. Each of the pair of connecting members is
As the pair of first pillars and the pair of second pillars approach each other in the long side direction, the central portions in the long side direction are bent so as to move upward, and the length in the long side direction is shortened,
The work scaffolding according to claim 1 , wherein as the pair of first pillars and the pair of second pillars move apart in the long side direction, the center portion extends so as to move downward, and the length in the long side direction increases. The work scaffolding according to claim 2, wherein, in the short side direction, the pair of connecting members are located outside the connection between the first and second telescopic sections. In the long side direction, a distance between a rotation center of the pair of first horizontal members and a center of the work floor is smaller than a distance between the rotation center of the pair of first horizontal members and an axis of each of the first supports,
A work scaffolding as described in any one of claims 1 to 3, wherein in the long side direction, a distance between the pivot center of the pair of second cross members and the center of the work floor is smaller than a distance between the pivot center of the pair of second cross members and the axis of each of the second supports. The work scaffolding according to any one of claims 1 to 4, wherein the first support and the second support are connected to the tie member so as to be able to rotate horizontally relative to the tie member. Each of the pair of connecting members includes a first rod-shaped member connected to the first support column so as to be rotatable in a vertical direction relative to the first support column, and a second rod-shaped member connected to the second support column so as to be rotatable in a vertical direction relative to the second support column,
The work scaffolding according to any one of claims 1 to 5, wherein the first rod-shaped member and the second rod-shaped member are connected to each other at a center in the long side direction of the connecting material so as to be rotatable in the up and down direction. The work scaffolding according to claim 6, wherein each of the pair of ties has a locking member that is locked to the first rod member and the second rod member at the center of the ties to prevent the ties from bending downward. The work scaffolding according to claim 7, wherein each of the pair of connecting members includes a restricting member that restricts the first rod member and the second rod member from rotating relative to each other so that the locking member moves downward from a state in which the connecting members are bent upward. The pair of first cross members and the pair of first pillars are respectively connected to each other,
The pair of second cross members and the pair of second pillars are respectively connected to each other,
when the pair of first columns and the pair of second columns approach each other in the long side direction, the pair of first cross members rotate horizontally relative to each other and the pair of second cross members rotate horizontally relative to each other so that the distance between the pair of first columns and the distance between the pair of second columns in the short side direction become larger;
9. A work scaffolding as described in any one of claims 1 to 8, wherein when the pair of first supports and the pair of second supports move away from each other in the long side direction, the pair of first cross members rotate horizontally relative to each other and the pair of second cross members rotate horizontally relative to each other so that the distance between the pair of first supports and the distance between the pair of second supports in the short side direction become smaller. 10. A work scaffolding as described in any one of claims 1 to 9, wherein in the short side direction, the connection portion between the first telescopic section and the second telescopic section is located more inward than the pair of first pillars and the pair of second pillars.

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