Working scaffolding

Abstract

To provide a work platform capable of being folded smoothly and reducing a dimension of a long side direction.SOLUTION: A work platform comprises: a pair of first support poles supporting two corner parts of one side in a long side direction of a work floor; a pair of second support poles supporting two corner parts of the other side in the long side direction of the work floor; a first extension part coupled to the pair of first support poles; a second extension part coupled to the pair of second support poles; and a pair of connection materials extending in a long side direction so as to couple the pair of first support poles and the pair of second support poles. The first extension part has a pair of first cross members intersecting in an X shape viewed from the above and the second extension part has a pair of second cross members intersecting in an X shape viewed from the above. The pair of connection materials are provided bendably upward respectively.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a movable and foldable working platform. [Background technology]

[0002] Conventionally, mobile work scaffolding has been used for interior construction work of buildings, etc. In particular, when interior construction work is performed, a work scaffolding structure that can be folded up is used so that it can pass through the door of the building or be placed on an elevator (for example, see Patent Documents 1 and 2).

[0003] The folding work scaffold disclosed in Patent Document 1 has a pair of legs supported by casters at both ends of the long side of the scaffold. A pantograph-shaped brace is provided to connect the pair of legs. The brace is provided so as to be expandable and contractible in the long side direction of the work scaffold within a vertical plane.

[0004] With the above-mentioned configuration, the folding work scaffold of Patent Document 1 can be folded by shortening the braces and bringing one leg closer to the other leg, thereby making it possible to reduce the dimension of the long side of the work scaffold.

[0005] 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 axis (hereinafter referred to as support axis) 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 a caster. The pair of upper diagonal bars are supported at their centers rotatably on the upper end of the support axis so that they can be closed and opened 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 axis so that they can be closed and opened in a horizontal plane while crossing each other to form an X shape when viewed from above.

[0006] With the above-mentioned configuration, the work scaffold 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 scaffold) closer to a pair of main legs on the other side. This makes it possible to reduce the width dimension of the work scaffold. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2011-52474 A [Patent Document 2] Japanese Utility Model Application Publication No. 6-24133 Summary of the Invention [Problem to be solved by the invention]

[0008] As described above, the work scaffolds disclosed in Patent Documents 1 and 2 can both be folded, so that the work scaffolds can be moved in a reduced size. However, as a result of various studies by the present inventors, it was found that the work scaffolds having the above-mentioned structure have the following problems.

[0009] Fig. 1 is a diagram for explaining the problems of a work scaffold having a diagonal brace that can expand and contract in a horizontal plane. The work scaffold 100 shown in Fig. 1 comprises a pair of legs 102 arranged 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. For ease of explanation, Fig. 1 omits the illustration of a work floor (a part supported by the upper ends of the pair of legs 102 and serving as a foothold for workers) and handrails etc. that the work scaffold 100 comprises.

[0010] 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 a worker pushes a 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 smoothly fold the work scaffold.

[0011] On the other hand, in the work scaffolding disclosed in Patent Document 2, a pair of diagonal rails are provided to rotate in a horizontal plane, so that it is possible to prevent the occurrence of bending force as shown in Fig. 2. Therefore, it is considered that the work scaffolding can be folded smoothly. However, in the configuration disclosed in Patent Document 2, the dimensions of the diagonal rails do not change, so the dimensions of the long side direction of the work scaffolding cannot be reduced.

[0012] Therefore, an object of the present invention is to provide a work scaffold that can be smoothly folded and has a small dimension in the long side direction. [Means for solving the problem]

[0013] The present invention relates to the following work scaffolding.

[0014] (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, supporting the work floor on the other side of the center of the work floor in the long side direction, and supported by casters each provided to be rotatable; 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 provided on the other side of the center of the work floor in the long side direction and 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.

[0015] (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, A work scaffolding as described in (1) above, in which 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.

[0016] (3) A work scaffolding as described in (2) above, wherein in the short side direction, the pair of connecting members are positioned outside the connection portion between the first telescopic section and the second telescopic section.

[0017] (4) In the long side direction, the distance between the pivot center of the pair of first horizontal members and the center of the work floor is smaller than the distance between the pivot 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.

[0018] (5) A work scaffolding described in any of (1) to (4) above, wherein 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.

[0019] (6) Each of the pair of connecting members includes a first rod-shaped member connected to the first support so as to be rotatable in a vertical direction relative to the first support, and a second rod-shaped member connected to the second support so as to be rotatable in a vertical direction relative to the second support, 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.

[0020] (7) A work scaffolding as described in (6) above, wherein each of the pair of connecting members is provided with a locking member that is locked to the first rod-shaped member and the second rod-shaped member at the center of the connecting member to prevent the connecting member from bending downward.

[0021] (8) A work scaffolding as described in (7) above, wherein 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. Effect of the Invention

[0022] According to the present invention, a work platform is obtained which can be smoothly folded and has a small dimension in the long side direction. [Brief description of the drawings]

[0023] [Figure 1]FIG. 1 is a diagram for explaining the problems with a work scaffold having a diagonal brace that is extendable and retractable within a horizontal plane. [Diagram 2] 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. [Diagram 3] FIG. 3 is a front view showing a work scaffold according to an embodiment of the present invention. [Figure 4] FIG. 4 is a plan view of the working platform of FIG. [Diagram 5] FIG. 5 is a left side view of the working scaffold of FIG. 3. [Figure 6] FIG. 6 is a diagram showing a pair of support units. [Figure 7] FIG. 7 is a diagram showing a support. [Figure 8] FIG. 8 is a diagram showing a support. [Figure 9] FIG. 9 is a diagram showing a support. [Figure 10] FIG. 10 is a diagram showing a support. [Figure 11] FIG. 11 is a diagram showing the working scaffold with the working floor removed. [Figure 12] 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. [Figure 13] FIG. 13 is a view showing a portion AA in FIG. [Figure 14] FIG. 14 is a diagram for explaining the connection portion and the support mechanism. [Figure 15] FIG. 15 is a diagram showing a connecting material. [Figure 16] FIG. 16 is a diagram showing a connecting material. [Figure 17] FIG. 17 is a diagram showing the first rod-shaped member. [Figure 18] FIG. 18 is a diagram showing the second rod-shaped member. [Figure 19] FIG. 19 is a diagram showing the locking member and the restricting member. [Figure 20] FIG. 20 is a diagram for explaining the relationship between the posts and the connecting members. [Figure 21]FIG. 21 is a diagram for explaining the relationship between the posts and the connecting members. [Figure 22] FIG. 22 is a diagram for explaining the operation of the work scaffold. [Diagram 23] FIG. 23 is a diagram for explaining the operation of the work scaffold. [Figure 24] FIG. 24 is a diagram showing the center of the connecting material in the long side direction. [Diagram 25] FIG. 25 is a diagram for explaining the operation of the connection portion. [Figure 26] FIG. 26 is a diagram showing another example of the connecting material. [Figure 27] FIG. 27 is a diagram showing a first rod-shaped member and a second rod-shaped member. [Figure 28] FIG. 28 is a diagram showing the center of the connecting material in the long side direction. [Figure 29] FIG. 29 is a diagram showing another example of the first connecting member. [Diagram 30] FIG. 30 is a diagram showing the first connecting member and the first rod-shaped member. [Diagram 31] FIG. 31 is a diagram showing another example of the connection portion. [Diagram 32] FIG. 32 is a diagram showing another example of a method for connecting a pair of support units. [Diagram 33] FIG. 33 is a diagram showing another configuration example of the first restriction mechanism. [Diagram 34] FIG. 34 is a diagram showing another configuration example of the work scaffold. [Diagram 35] FIG. 35 is a diagram showing another example of the configuration of the support. [Diagram 36] FIG. 36 is a diagram showing another example of the configuration of the support. [Figure 37] FIG. 37 is a diagram showing another configuration example of the work scaffold. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] (Work scaffolding configuration) 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 in Fig. 3, and Fig. 5 is a left side view of the work scaffold in 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.

[0025] As shown in FIG. 3, the working scaffold 10 according to this embodiment includes a working floor 12, a pair of support units 14a, 14b, a connecting portion 16, and a supporting mechanism 18. The working floor 12 is supported by the pair of supporting units 14a, 14b via the connecting portion 16 and the supporting mechanism 18, as will be described in detail later. Although not shown in the figure to avoid cluttering the drawing, when a worker works, a handrail frame is attached to the working floor 12 so as to cover the periphery of the working floor 12. In addition, when a worker ascends or descends the working floor 12, a ladder is used. As the configuration of the handrail frame and the climbing ladder, various known configurations of the handrail frame and the climbing ladder can be used, so the description will be omitted.

[0026] As shown in FIG. 4, the working floor 12 has a rectangular shape when viewed from above. In this embodiment, the working floor 12 has a rectangular shape with corners 12a to 12d at the four corners. As shown in FIG. 3 and FIG. 4, in this embodiment, the working floor 12 has a first floor section 20 and a second floor section 22 arranged to be aligned in the long side direction of the working floor 12. In this embodiment, the first floor section 20 is provided on one side in the long side direction of the working floor 12, and the second floor section 22 is provided on the other side in the long side direction of the working floor 12. In the following, when simply referring to the long side direction, it means the long side direction of the working floor 12. Also, when simply referring to the short side direction, it means the short side direction of the working floor 12. Note that the shape of the working floor is not limited to the shape shown in FIG. 4, and the working floor may be configured to form a substantially rectangular shape as a whole. When the working floor is not completely rectangular, the long side direction means the longitudinal direction of the working floor, and the short side direction means the transverse direction of the working 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.

[0027] 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 also 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 (a part that serves as a foothold for workers) is fixed on the frame body 20a. Similarly, a mesh-like floor material is fixed on 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 provided with an anti-slip coating.

[0028] FIG. 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 FIG. 6(a), in order to avoid the drawing becoming complicated, some of the configurations of the support units 14a and 14b (casters, etc.) are omitted. In each of the drawings described later, some of the configurations of the work scaffold 10 are also omitted as appropriate. In FIG. 6, the support units 14a and 14b are shown in a state where they are separated from each other, but in the work scaffold 10, the support units 14a and 14b are connected to each other. The connection between the support units 14a and 14b will be described later.

[0029] As shown in FIG. 6, the support unit 14a has a pair of supports 40, 42 arranged to intersect with each other when viewed from above, and the support unit 14b has a pair of supports 44, 46 arranged to intersect with each other when viewed from above.

[0030] Fig. 7 is a diagram showing the support 40, Fig. 8 is a diagram showing the support 42, Fig. 9 is a diagram showing the support 44, and Fig. 10 is a diagram showing the support 46. In Fig. 7 and Fig. 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 Fig. 9 and Fig. 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.

[0031] As shown in Fig. 7, the support 40 has a support pillar 40a extending in the vertical direction, a plurality of horizontal members 40b, 40c, and 40d extending in the horizontal direction, and a plurality of vertical members 40e and 40f extending in the vertical direction. The support pillar 40a is supported by a caster 40g equipped with wheels. The caster 40g is attached to the support pillar 40a so as to be rotatable around a rotation axis extending in the vertical direction. As shown in Fig. 4, when the working scaffold 10 is used, the corner portion 12a of the working floor 12 is supported by the support pillar 40a.

[0032] As shown in FIG. 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 later.

[0033] One end of the horizontal member 40b is connected to the support 40a. In this embodiment, one end of the horizontal member 40b is fixed to the second member 41b of the support 40a. In this embodiment, the horizontal 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 of the support columns 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 support pillars 44a, 46a side) of the center of the horizontal member 40b.

[0034] As shown in FIG. 7, the horizontal member 40c is provided below the horizontal member 40b. One end of the horizontal member 40c is connected to the support 40a. In this embodiment, one end of the horizontal member 40c is fixed to the second member 41b, similar to the horizontal member 40b. In this embodiment, the horizontal 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.

[0035] The horizontal member 40d is provided below the horizontal member 40c. One end of the horizontal member 40d is connected to the support 40a. In this embodiment, one end of the horizontal member 40d is fixed to the second member 41b, similar to the horizontal members 40b and 40c. In this embodiment, the horizontal 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.

[0036] 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 members 40b, 40c, and 40d are provided to extend in the same direction from support 40a.

[0037] 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 as to be able to rotate around a rotation axis extending in the vertical direction. As shown in FIG. 4, when the working scaffold 10 is used, the corner portion 12b of the working 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 working floor 12 on one side of the center of the working floor 12 in the long side direction, and the support 40a, 42a correspond to the first support.

[0038] As shown in FIG. 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.

[0039] One end of the horizontal member 42b is connected to the support 42a. In this embodiment, one end of the horizontal member 42b is fixed to the second member 43b of the support 42a. In this embodiment, the horizontal 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 of the support columns 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 support pillars 44a, 46a side) of the center of the horizontal member 42b.

[0040] 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 pillars 44a, 46a side) of the center of the cross member 42c in the long side direction of the work floor 12.

[0041] 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 provided to extend in the same direction from the support 42a.

[0042] As shown in Fig. 9, the support 44 has a similar structure to the support 42. Therefore, the structure 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, a vertical member 44d, and a diagonal member 44e. The support post 44a is supported by a caster 44f. As shown in Fig. 4, when the working scaffold 10 is used, the corner 12c of the working floor 12 is supported by the support post 44a.

[0043] As shown in FIG. 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 on one side (the side of the pillars 40a, 42a) of the center of the cross member 44c.

[0044] 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, 46d, and vertical members 46e, 46f. The support 46a is supported by a caster 46g. As shown in FIG. 4, when the working scaffold 10 is used, the corner 12d of the working floor 12 is supported by the support 46a. In this embodiment, the support 44a, 46a are arranged apart from each other in the short side direction and support the working floor 12 on the other side of the center of the working floor 12 in the long side direction, and the support 44a, 46a correspond to the second support.

[0045] 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 rotating 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 rotating 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 rotating 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. 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.

[0046] 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.

[0047] With this configuration, 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. Also, 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. Furthermore, 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 stretchable portion 48a.

[0048] 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 members 46b and 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.

[0049] With this configuration, in this embodiment, the horizontal members 46b and 44b cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. Also, the horizontal members 44b and 46c cross in an X-shape when viewed from above and are connected to each other so as to be rotatable in the horizontal direction. Furthermore, the horizontal members 44c and 46d 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 44b, 44c, 46b, 46c, 46d, the vertical members 44d, 46e, 46f, and the diagonal member 44e constitute the second stretchable section 48b.

[0050] 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 horizontal 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 horizontal 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 portion 48a is positioned at a position eccentric to the other side (the support pillars 44a, 46a side) from the center of the first telescopic portion 48a in the long side direction.

[0051] Similarly, in this embodiment, in the long side direction of the work floor 12, the distance between the rotation center (axis center of each connecting shaft 34, 36) of each horizontal member 46b, 44b, 46c, 44c, 46d and the center of the work floor 12 is smaller than the distance between the rotation center of each horizontal member 46b, 44b, 46c, 44c, 46d and the axis center of each support 44a, 46a. In other words, in this embodiment, the swing center (connecting shaft 34, 36) of the second telescopic part 48b is positioned at a position eccentric to one side (support 40a, 42a side) from the center of the second telescopic part 48b in the long side direction.

[0052] By configuring the first telescopic portion 48a and the second telescopic portion 48b in this manner, the length in the short side direction of the connecting portion between the first telescopic portion 48a and the second telescopic portion 48b can be made shorter than the distance between the support pillar 40a and the support pillar 42a and the distance between the support pillar 44a and the support pillar 46a, as shown in FIG. 11 described below.

[0053] Although detailed description is omitted, the upper end of each of the pillars 40a, 42a, 44a, 46a is provided so as to be detachable from the working floor 12. In this embodiment, the third members 41z, 43z, 45z, 47z are configured so as to be detachable from the working floor 12. When storing the working floor 12 as described later, the upper end (third members 41z, 43z, 45z, 47z) of each of the pillars 40a, 42a, 44a, 46a is removed from the working floor 12. In this embodiment, when attaching the working floor 12 to the third members 41z, 43z, 45z, 47z, the third members 41z, 43z, 45z, 47z are fixed to the second members 41b, 43b, 45b, 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, but the columns 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.

[0054] Next, a method of connecting the support unit 14a and the support unit 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. In Fig. 11, the work floor 12 is omitted in order to make it easier to understand the configuration of the work scaffold 10. Fig. 12 is a view of the connection part 16 and its surroundings seen from one side in the long side direction. In Fig. 12, only the rotating parts 41d, 41g, 43d, 45d, 47d, and 47g are shown among the components of the supports 40, 42, 44, and 46 in order to simplify the drawing.

[0055] 11 and 12, in this embodiment, a connecting shaft 50 extending in the up-down 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 as to be able to rotate horizontally relative to one another about the connecting shaft 50 as a rotation axis. This allows the horizontal member 40b to rotate horizontally around the rotating part 41d, the horizontal member 44b to rotate horizontally around the rotating part 45d, and the horizontal member 40c to rotate horizontally around the rotating part 41g.

[0056] In this embodiment, a connecting shaft 52 extending in the up-down 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 as to be able to rotate horizontally relative to one another about the connecting shaft 52 as a rotation axis. This allows the horizontal member 46b to rotate horizontally around the rotating part 47d, the horizontal member 42b to rotate horizontally around the rotating part 43d, and the horizontal member 46c to rotate horizontally around the rotating part 47g.

[0057] As shown in FIG. 11, a connecting shaft 54 ​​extending in the vertical direction is inserted into the rotating part 43g of the horizontal member 42c and the rotating part 47j of the horizontal member 46d. The rotating part 43g and the rotating part 47j are connected to each other so as to be rotatable in the horizontal direction with respect to each other about the connecting shaft 54 ​​as a rotation axis. This allows the horizontal member 42c to rotate in the horizontal direction around the rotating part 43g, and the horizontal member 46d to rotate in the horizontal direction around the rotating part 47j. Similarly, referring to FIG. 6, a connecting shaft (not shown) extending in the vertical direction is inserted into the rotating part 45g of the horizontal member 44c and the rotating part 41j of the horizontal member 40d. The rotating part 45g and the rotating part 41j are connected to each other so as to be rotatable in the horizontal direction with respect to each other about the connecting shaft as a rotation axis. As a result, the cross member 44c can rotate horizontally around the rotating portion 45g, and the cross member 40d can rotate horizontally around the rotating portion 41j.

[0058] In the above manner, the support unit 14a and the support unit 14b are connected to each other. In this embodiment, the support unit 14a and the support unit 14b are connected to each other so that the connecting shaft 30 and the connecting shaft 32 are positioned coaxially, and the connecting shaft 34 and the connecting shaft 36 are positioned coaxially. In this embodiment, the support unit 14a and the support unit 14b are connected to each other so that the connecting shaft 52 and the connecting shaft 54 ​​are positioned coaxially, and the connecting shaft 50 and the connecting shaft inserted into the rotating parts 41j and 45g are positioned coaxially.

[0059] Next, the connection part 16 will be described. Fig. 13 is a view showing the AA portion of Fig. 12. As shown in Figs. 11 to 13, the connection part 16 is provided to extend in the short side direction so as to connect the connection shaft 50 and the connection shaft 52. As shown in Fig. 12, in this embodiment, the connection part 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.

[0060] The first connecting member 60 is provided so as to extend from the connecting shaft 50 toward the connecting shaft 52. 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. The second cylindrical portion 60b opens toward the connecting shaft 52. In addition, a through hole 60c is formed in the second cylindrical portion 60b on both sides in the long side direction so as to extend in the short side direction.

[0061] The second connecting member 62 is provided so as to extend from the connecting shaft 52 toward the connecting shaft 50. In this embodiment, the second connecting 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. The second cylindrical portion 62b opens toward the connecting shaft 50. In addition, a through hole 62c is formed in the second cylindrical portion 62b on both sides in the long side direction so as to extend in the short side direction.

[0062] The guide member 64 is provided so as to be movable in the short side direction relative to the first connecting member 60 and the second connecting member 62. 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.

[0063] 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 in 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 in 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 connecting 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 connecting member 62 relative to the guide member 64 to a predetermined range. The movement range of the first connecting member 60 and the second connecting member 62 relative to the guide member 64 can be adjusted by adjusting the lengths of the through holes 60c, 62c in the short side direction.

[0064] 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.

[0065] 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 central portion in the long side direction of the working floor 12. As shown in Figs. 11 to 13, in this embodiment, the support mechanism 18 is supported by a pair of guide members 64.

[0066] 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 provided 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.

[0067] 11, 13 and 14, in this embodiment, the first rotation 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 rotation 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.

[0068] 14, a through hole 81a is formed in the fixed support part 80 near the connecting shaft 84a. Furthermore, a through hole 83a is formed in the first rotation 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. Furthermore, a through hole 83b is formed in the second rotation support part 82b near the connecting shaft 84b.

[0069] As shown in Fig. 13, the through holes 81a and 83a are formed so as to be able to overlap with each other when viewed from the short side direction. Similarly, the through holes 81b and 83b are formed so as to be able to overlap with each other when viewed from the short side direction. Therefore, in this embodiment, by inserting a rod-shaped member (not shown) into the through holes 81a and 83a, it is possible to prevent the first rotation support part 82a from rotating with respect to the fixed support part 80. Similarly, by inserting a rod-shaped member (not shown) into the through holes 81b and 83b, it is possible to prevent the second rotation support part 82b from rotating with respect to the fixed support part 80.

[0070] 4 and 11, the pair of first pivot support parts 82a are fixed to a pair of connecting members 20b. This allows the first bed part 20 to pivot 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 a pair of connecting members 22b. This allows the second bed part 22 to pivot integrally with the second pivot support parts 82b relative to the fixed support part 80.

[0071] As shown in Fig. 11, a pair of connecting members 70 extending in the long side direction are provided to connect the pair of supports 40a, 42a and the 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 the support 40a to the first member 45a of the 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 the support 42a (see Fig. 8) to the first member 47a of the support 46a (see Fig. 10).

[0072] 15 is a diagram showing the connecting material 70, where (a) is a plan view and (b) is a front view. As shown in Fig. 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.

[0073] Fig. 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 member 70, where (a) is a plan view and (b) is a front view. Fig. 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. Fig. 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. It should be noted that in Figures 17(a), (c), and (e), the central portion of the first rod-shaped member 71a is omitted, and in Figures 18(a), (c), and (e), the central portion of the second rod-shaped member 71b is omitted.

[0074] 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 on the first connecting member 71c side. The notch 700 is formed in the upper part of the first rod-shaped member 71a. An arc-shaped inclined surface 702 is formed at the end of the first rod-shaped member 71a on the locking member 71e side. The inclined surface 702 is formed so as to face obliquely upward.

[0075] 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 inclined surface 706 is formed at the end of the second rod-shaped member 71b on the locking member 71e side. The inclined surface 706 is formed so as to face obliquely upward.

[0076] As shown in FIG. 16, the first connecting member 71c includes a cylindrical rotating member 708 and a plate-shaped supporting member 710. The supporting member 710 is fixed to the outer circumferential surface of the rotating member 708. The supporting 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 supporting member 714. The supporting member 714 is fixed to the outer circumferential surface of the rotating member 712. The supporting member 714 is provided so as to extend in the radial direction of the rotating member 712.

[0077] 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 later.

[0078] 19 is a diagram showing the locking member 71e and the regulating member 71f, where (a) is a front view and (b) is a right side view. As shown in FIG. 16 and FIG. 19, the locking member 71e has a main body portion 716 having an inverted U-shaped cross section and a cylindrical support portion 718. In this embodiment, the main body portion 716 has a pair of side wall portions 716a, 716b and a top plate portion 716c that connects the upper ends of the pair of side wall portions 716a, 716b. The support portion 718 is fixed on the top plate portion 716c at one end of the main body portion 716 in the longitudinal direction.

[0079] 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.

[0080] 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 in the vertical direction relative to the locking member 71e.

[0081] Fig. 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 the bb portion of (a). Note that in Fig. 20(b), the caster 40g is omitted from the illustration in order to avoid the drawing becoming too complicated.

[0082] 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 in the vertical direction 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 a 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 in the vertical direction relative to the support 40a.

[0083] In this embodiment, the rotating member 708 is fitted to the first member 41a so as to be rotatable in the horizontal direction around the support 40a (first member 41a). This allows the first rod-shaped member 71a and the support 40a (first member 41a) to rotate in the horizontal direction relative to each other, as shown in FIG.

[0084] 11(b), the second connecting member 71d and the support column 44a are connected in the same manner as the first connecting member 71c and the support column 40a described above, although detailed description will be omitted. That is, the second rod-shaped member 71b is connected to the support column 44a via the second connecting member 71d so as to be able to rotate in the vertical direction relative to the support column 44a. In addition, the second rod-shaped member 71b and the support column 44a can rotate in the horizontal direction relative to each other.

[0085] In this embodiment, the first rod-shaped member 71a and the second rod-shaped member 71b can rotate up and down relative to the locking member 71e at the center of the connecting member 70 in the long side direction. This allows the connecting member 70 on one side in the short side direction to bend upward between the support pillar 40a and the support pillar 44a, as shown in FIG.

[0086] Although detailed description 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.

[0087] 16, in this embodiment, the central portion of the long side direction of the tying material 70 is prevented from bending downward by the locking member 71e provided at the central portion of the tying material 70 being locked by the first rod-shaped member 71a and the second rod-shaped member 71b. Furthermore, in this embodiment, the end portion of the first rod-shaped member 71a on the first connecting member 71c side contacts the support member 710 from below, and the end portion 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 central portion of the tying 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.

[0088] (Effects of working scaffolding) In the work scaffold 10 according to this embodiment, a pair of supports 40a, 42a and a 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 extendable and retractable in the long side direction. The first telescopic section 48a has a plurality of cross members that intersect 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 intersect in an X-shape when viewed from above and are connected to be rotatable in the horizontal direction.

[0089] With this configuration, in the work scaffold 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 long side dimension of the first telescopic section 48a becomes smaller. In addition, the cross members 46b, 46c and the cross member 44b rotate horizontally relative to each other around the connecting axis 34 (not shown in Figure 22(b)) so that the dimension of the long side of the second stretchable portion 48b becomes smaller, and the cross members 44c and 46d rotate horizontally relative to each other around the connecting axis 36 (see Figure 11(b); not shown in Figure 22(b)).

[0090] 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 relative to each other about the connecting shaft 30, and the cross members 42c and 40d rotate horizontally relative to each other about the connecting shaft 32, so that the dimension of the long side direction of the first telescopic portion 48a increases. Also, the cross members 46b, 46c and the cross member 44b rotate horizontally relative to each other about the connecting shaft 34, and the cross members 44c and 46d rotate horizontally relative to each other about the connecting shaft 36, so that the dimension of the long side direction of the second telescopic portion 48b increases.

[0091] As described above, in the work scaffold 10 according to this embodiment, the distance in the long side direction between the supports 40a, 42a and the supports 44a, 46a can be reduced by rotating the multiple horizontal 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 the multiple horizontal members are rotated in the vertical direction, it is possible to prevent the bending force as described in FIG. 2 from being applied to each horizontal member. This allows the work scaffold 10 to be folded smoothly.

[0092] In addition, in the working scaffold 10 according to this embodiment, the first telescopic section 48a configured to be extendable and the second telescopic section 48b configured to be extendable are arranged side by side in the long side direction, so that the dimension of the working scaffold 10 in the long side direction can be sufficiently reduced. 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 reduced. This makes it possible to prevent the dimension of the working scaffold 10 in the short side direction from becoming large when the working scaffold 10 is folded.

[0093] 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. 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, thereby improving work efficiency.

[0094] In addition, in this embodiment, the pair of connecting members 70 are located outside the connection portion between the first telescopic portion 48a and the second telescopic portion 48b (in this embodiment, the rotating portions 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 portion 48a and the second telescopic portion 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 scaffold 10 small.

[0095] In this embodiment, the pillars 40a, 42a, 44a, 46a are connected to the pair of tie members 70 so as to be rotatable horizontally relative to the pair of tie members 70. This allows the pillars 40a, 42a, 44a, 46a to rotate relative to the pair of tie members 70 when folding and unfolding the work scaffolding 10. As a result, the work scaffolding 10 can be folded and unfolded smoothly.

[0096] When storing the work floor 12 of the work scaffold 10, first, the connections between the pillars 40a, 42a, 44a, 46a and the work floor 12 are released. At this time, the first rotation support part 82a and the second rotation support part 82b are made unable to rotate relative to the fixed support part 80. That is, the top surface of the first floor part 20 (the surface that is stepped on by a worker when the work scaffold 10 is in use) is kept facing upward, and the top surface of the second floor part 22 (the surface that is stepped on by a worker when the work scaffold 10 is in use) is kept facing upward.

[0097] 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. Since the connection part 16 is provided at the connection part between the first telescopic part 48a and the second telescopic part 48b, 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.

[0098] 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 between 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 between the connecting shaft 50 and the connecting shaft 52. This makes it possible to prevent the work floor 12 from moving to a position offset 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.

[0099] Finally, as shown in Fig. 23(b), the first and second pivoting support parts 82a and 82b are brought into a state in which they can rotate relative to the fixed support part 80, and the first and second floor parts 20 and 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.

[0100] When folding the work scaffold 10, first, the support 40a and the support 44a are brought closer to each other, and the center of the connecting material 70 between the support 40a and the support 44a is bent slightly 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. That is, the bent state of the connecting material 70 is maintained. Next, the support 42a and the support 46a are brought closer to each other, and the center of the connecting material 70 between the support 42a and the support 46a is bent in the same manner as the connecting material 70 between the support 40a and the support 44a. Thereafter, 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 manner, 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 working scaffold 10 can be easily folded by one person. The structure of the restricting member for maintaining the bent state of the ties 70 is not limited to the above-mentioned 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.

[0101] When the work scaffold 10 with the work floor 12 stored is 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.

[0102] 5, when the work scaffold 10 is used, the pillars 40a and 42a are connected by a connecting material 72. Similarly, the 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 pillars 40a, 44a and the pillars 42a, 46a.

[0103] 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 becomes large. 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 becomes small. 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.

[0104] In this embodiment, the movement range of the first connecting member 60 and the second connecting 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 come into contact with the inner edges of the through holes 60c, 62c in the short side direction, thereby restricting the first connecting member 60 and the second connecting 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 come into contact with the outer edges of the through holes 60c, 62c in the short side direction, thereby restricting the first connecting member 60 and the second connecting member 62 from moving inward in the short side direction relative to the guide member 64.

[0105] In this embodiment, the length and position of the through holes 60c, 62c and the positions of the locking members 66a, 66b are adjusted so that 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 at 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 support mechanism 18 is located at the center between the connecting shaft 50 and the connecting shaft 52. This allows the support mechanism 18 to be positioned at 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 at an appropriate position.

[0106] (Modification of 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).

[0107] Although details will be described later, first rod-shaped member 73a differs from first rod-shaped member 71a (see FIG. 16) in the structure of the end portion on the locking member 73e side. Second rod-shaped member 73b includes a cylindrical main body 731 and a plate-shaped connecting member 732. Locking member 73e has an inverted U-shaped cross section, similar to main body 716 of locking member 71e described above.

[0108] 27 is a diagram showing 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 configuration similar to that of 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 configuration similar to that of 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 from the illustration.

[0109] As shown in FIG. 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 FIGS. 26 and 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.

[0110] In this embodiment, the first rod-shaped member 73a is fixed to the locking member 73e. The connecting member 732 is provided rotatably 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 direction of the tether 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 direction of the tether 70 from bending downward. Although not shown, it is preferable to provide a restricting member for maintaining the bent state of the tether 70 in this embodiment as well.

[0111] FIG. 29 is a diagram showing another example of the first connecting member 71c, where (a) is a front view and (b) is a right side view. The first connecting member 71c shown in FIG. 29 is different from the above-mentioned first connecting member 71c (see FIG. 16) in that it includes 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 smoothly bent. 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.

[0112] (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 intersecting in an X-shape. However, each of the first telescopic section and the second telescopic section only needs to have at least a pair of cross members intersecting in an X-shape. Therefore, each telescopic section may be composed of a pair of cross members intersecting 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. Furthermore, when each telescopic section is made up of three or more horizontal members, at least two of the horizontal members may intersect in an X-shape when viewed from above and be connected to each other so as to be rotatable in the horizontal direction. Therefore, when each telescopic section is made up of three or more horizontal members, two horizontal members and one other horizontal member may intersect in an X-shape when viewed from above and be connected to each other so as to be rotatable in the horizontal direction, as in the relationship between horizontal members 40b, 40c and horizontal member 42b described above.

[0113] 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 in which the distance between them decreases. In this case, when the work scaffold 10 is expanded, the distance between the connecting shaft 50 and the connecting shaft 52 can be easily reduced. In other words, the dimensions in the long side direction of the first telescopic portion 48a and the second telescopic portion 48b can be easily increased. As a result, the work scaffold 10 can be easily expanded.

[0114] 11 and 12, in the above embodiment, the rotating parts 41d, 41g of the support 40 and the rotating part 45d of the support 44 are connected by a common connecting shaft 50, and the rotating part 43d of the support 42 and the rotating parts 47d, 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.

[0115] In the above embodiment, 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 are configured by the through holes 60c, 62c and the locking members 66a, 66b. 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.

[0116] In addition, in Figure 33, (a) is a diagram showing the second tubular portion 60b and the guide member 64 of the first connecting member 60, (b) is a schematic diagram showing the bb portion of (a), and (c) is a schematic diagram showing the cc portion of (a).

[0117] 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 recessed downward so as to avoid the locking member 76a. A substantially L-shaped locking member 78 is fixed to the end portion 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.

[0118] 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 working scaffold when in use, and (b) is a left side view of the working scaffold when folded. In Fig. 34, most of the components of the working scaffold 10 are omitted to avoid cluttering the drawing.

[0119] 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 and 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 and 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 ties 94 can be shortened when the work scaffold 10 is in use, and as shown in Fig. 34(b), the overall length of the ties 94 can be lengthened when the work scaffold 10 is folded. This eliminates the need to attach and remove the ties 94 when unfolding and folding the work scaffold 10, improving work efficiency.

[0120] In the work scaffold 10 shown in Figure 5, one connecting member 72 is provided between each of the supports 40a and 42a, and between each of the supports 44a and 46a. However, as with the work scaffold 10 shown in Figure 34, multiple connecting members 72 may be provided between each of the supports 40a and 42a, and between each of the supports 44a and 46a.

[0121] 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.

[0122] 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 scaffolding 10 from shaking in the long side direction.

[0123] 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 supports the diagonal member 96 via a cylindrical holding member 97 supported by the vertical member 40f so as to be able to 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.

[0124] 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 horizontal 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 horizontal member 44c supports the diagonal member 98 via a cylindrical holding member 99 that is supported by the horizontal member 44c so as to be able to 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.

[0125] 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 portion 48b (vertical member 46f in this embodiment) so as to be able to advance and retreat in the axial direction relative to the second telescopic portion 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 portion 48a (horizontal member 42c in this embodiment) so as to be able to advance and retreat in the axial direction relative to the first telescopic portion 48a (see FIG. 11).

[0126] 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, but 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.

[0127] 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, but 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.

[0128] 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 a state in which the height of the work scaffold 10 is lowered, and (b) shows a 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.

[0129] 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, 43b via a connecting member 94 that connects the second member 41b and the second member 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, 43a via a connecting member 94 that connects the first member 41a and the first member 43a. Although not shown, 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.

[0130] As described above, by providing the diagonal members 200 between the columns 40a and 42a and between the columns 44a and 46a, respectively, the work scaffold 10 can be sufficiently prevented from swaying in the short side direction.

[0131] In this embodiment, one end of the diagonal member 200 is supported by the connecting member 94 so as to be able to swing up and down. Similarly, the other end of the diagonal member 200 is supported by the connecting member 94 so as to be able to 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.

[0132] In addition, it is sufficient that the diagonal member 200 between the support 40a and the support 42a has one end (upper end) supported by at least one second member of the support 40a, 42a so as to be swingable in the vertical direction, and the other end (lower end) supported by at least the other first member of the support 40a, 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. Detailed explanation will be omitted, but similarly, the diagonal member 200 between the supports 44a and 46a has one end (upper end) supported by the second member of at least one of the supports 44a, 46a so as to be swingable in the vertical direction, and the other end (lower end) supported by the first member of at least the other of the supports 44a, 46a so as to be swingable in the vertical direction. [Industrial Applicability]

[0133] According to the present invention, a work platform is obtained which can be smoothly folded and has a small dimension in the long side direction. [Explanation of symbols]

[0134] 10 Working scaffolding 12 Work platform 14a, 14b Support unit 16 Connection 18 Support mechanism 20 First Floor 20a frame 20b Connector 22 Second Floor 22a Frame 22b Connector 30, 32, 34, 36 connection shaft 40, 42, 44, 46 Support 40a, 42a, 44a, 46a posts 40g, 42f, 44f, 46g casters 40b, 40c, 40d, 42b, 42c, 44b, 44c, 46b, 46c, 46d cross member 41d, 41g, 41j, 43d, 43g, 45d, 45g, 47d, 47g, 47j Rotating part 48a 1st telescopic section 48b 2nd telescopic part 50,52,54 Connecting shaft 60 First connecting member 60a First cylindrical portion 60b Second cylindrical portion 60c through hole 62 Second connecting member 62a First cylindrical portion 62b Second cylindrical portion 62c through hole 64 Guide member 66a, 66b Locking member 68a, 68b Vertical members 70,72 Tie material 74 Elastic Members 76a, 76b, 78 Locking member 80 Fixed support part 81a, 81b through hole 82a First rotating support part 82b Second rotating support part 83a, 83b through hole 84a, 84b connection shaft 90 Connecting material 92 Connecting shaft 94 Connectors 96,98,200 Diagonal material

Claims

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 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 central portion extends so as to move downward, and the length in the long side direction increases.

3. The work scaffolding according to claim 2 , wherein in the short side direction, the pair of connecting members are located outside a connection portion between the first telescopic section and the second telescopic section.

4. 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.

5. The work scaffolding according to claim 1 , wherein the first support column and the second support column are connected to the tether so as to be horizontally rotatable relative to the tether.

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, 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.

7. The work scaffolding described in claim 6, wherein each of the pair of connectors is provided with a locking member that is locked to the first rod member and the second rod member at the center of the connector to prevent the connector from bending downward.

8. The work scaffolding described in claim 7, wherein 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.

9. The pair of first cross members and the pair of first pillars are respectively connected, 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 described in any 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 supports and the pair of second supports.

Images