Work scaffold and dismantle method thereof

Abstract

To provide work scaffolds that can be safely dismantled.SOLUTION: A right side surface 2a of a first work scaffold board 2 is attached to a connecting portion 4 such that the first work scaffold board 2 can pivot from a horizontal state to a vertical state or from a vertical state to a horizontal state (refer to an arrow Y1 direction in Fig. 2(a)). Furthermore, a left side surface 3a of a second work scaffold board 3 is attached to the connecting portion 4 such that the second work scaffold board 3 can pivot from the horizontal state to the vertical state or from the vertical state to the horizontal state (refer to an arrow Y2 direction in Fig. 2(a)).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a work scaffold and a method for removing the work scaffold. [Background technology]

[0002] Conventionally, a known construction method for mountain piers and gantry piles is described in, for example, Non-Patent Document 1. This Non-Patent Document 1 will be specifically described with reference to Figs.

[0003] As shown in Fig. 4, the aerial work scaffolding device 100 is equipped with a crawler crane K, a receiver tank R, a compressor C, a generator H, and a water tank S. Also, as shown in Fig. 4, a down-the-hole hammer D is suspended from the hoisting wire Ka of the crawler crane K via a swivel TS. As shown in Fig. 4, this down-the-hole hammer D is inserted into a table machine T installed on a drilling stand SK. As a result, the down-the-hole hammer D rotates with the rotation of the table machine T, allowing concrete to be driven into sloping ground in high-altitude mountainous areas. [Prior art documents] [Patent documents]

[0004] [Non-Patent Document 1] "Table Machine Down-the-Hole Hammer Method," [online], Oak Co., Ltd., [Retrieved March 28, 2024], Internet (https: / / www.oak-co.co.jp / construction / dth_hammer_method / table_machine_type / ) Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the above-mentioned high altitude work scaffolding device 100 is constructed as follows.

[0006] 5 and 6, a plurality of first support legs 101a (four in the figure) are installed at regular intervals in the left-right direction, a plurality of second support legs 101b (four in the figure) are installed at regular intervals in the left-right direction, and a plurality of third support legs 101c (four in the figure) are installed at regular intervals in the left-right direction. As shown in Fig. 5, the plurality of first support legs 101a, the plurality of second support legs 101b, and the plurality of third support legs 101c are installed at regular intervals in the front-rear direction.

[0007] Meanwhile, between the plurality of first support legs 101a and the plurality of second support legs 101b, and further between the plurality of second support legs 101b and the plurality of third support legs 101c, the main girder 102 shown in Figures 4 to 6 is suspended, and the reinforcing brace 103 shown in Figure 4 is suspended.

[0008] 5 and 6, a first cross beam 104a connecting the first support legs 101a is installed on the upper surfaces of the multiple first support legs 101a, a second cross beam 104b connecting the second support legs 101b is installed on the upper surfaces of the multiple second support legs 101b, and a third cross beam 104c connecting the third support legs 101c is installed on the upper surfaces of the multiple third support legs 101c. Furthermore, as shown in FIGS. 5 and 6, multiple main beams 102 are installed between the first cross beam 104a and the second cross beam 104b, and further between the second cross beam 104b and the third cross beam 104c.

[0009] Furthermore, as shown in Figures 5 and 6, a support plate 105 is laid on the upper surface of the multiple main girders 102, and a crawler crane K or the like is placed on this support plate 105, as shown in Figure 4. Note that reference numeral 106 in Figure 4 denotes a handrail frame.

[0010] Thus, the aerial work scaffolding apparatus 100 is constructed as described above.

[0011] Incidentally, when the main girder 102 shown in Figures 4 to 6 and the reinforcing brace 103 shown in Figure 4 are hung between the multiple first support legs 101a and the multiple second support legs 101b, and further between the multiple second support legs 101b and the multiple third support legs 101c, the hanging work is carried out by workers.

[0012] To explain using a specific example, as shown in Figures 5 and 6, work scaffolding 107 is installed on an L-shaped installation stand 108 at regular intervals in multiple vertical stages so as to connect between the multiple second support legs 101b, and further work scaffolding 107 is installed on the L-shaped installation stand 108 at regular intervals in multiple vertical stages so as to connect between the multiple third support legs 101c. Thus, using this work scaffolding 107, multiple workers perform the work of spanning the main girders 102 shown in Figures 4 to 6 and the reinforcing braces 103 shown in Figure 4 between the multiple first support legs 101a and the multiple second support legs 101b, and further between the multiple second support legs 101b and the multiple third support legs 101c. 5 and 6, ladders (not shown) are installed on the left and right sides of the plurality of first support legs 101a, the plurality of second support legs 101b, and the plurality of third support legs 101c, and workers can move up and down these ladders (not shown) to reach the desired work scaffolding 107. Furthermore, the L-shaped installation platform 108 is installed by multiple workers in the vertical direction of the plurality of second support legs 101b and the plurality of third support legs 101c, as shown in FIGS. 5 and 6, before the multiple workers install the work scaffolding 107.

[0013] When setting up such a work scaffolding 107, as shown in Figure 5, the operator operating the crawler crane K shown in Figure 4 moves the work scaffolding 107, which is suspended from a hoisting wire Ka, to a predetermined position, and then multiple workers waiting at that position remove the hoisting wire Ka from the work scaffolding 107 and set it up in the predetermined position.

[0014] On the other hand, once the work of suspending the main girders 102 shown in FIGS. 4 to 6 and the reinforcing braces 103 shown in FIG. 4 between the plurality of first support legs 101a and the plurality of second support legs 101b, or between the plurality of second support legs 101b and the plurality of third support legs 101c, is completed, the work of removing the work scaffolding 107 becomes necessary. At this time, as shown in FIG. 6, a sling wire Ka (see two-dot chain line) is attached to the work scaffolding 107 to be removed, and the operator operates the crawler crane K shown in FIG. 4 to remove it. However, if the work scaffolding 107 to be removed is moved upward from the installation location as shown in FIG. 6, the work scaffolding 107 to be removed will hit the main girders 102 and will not be able to be removed.

[0015] Therefore, a sling wire Ka (see two-dot chain line) shown in FIG. 6 is inserted between the main girders 102, and after multiple workers attach the sling wire Ka (see two-dot chain line) to the work scaffolding 107, an operator operates the crawler crane K shown in FIG. 4 to slide the work scaffolding 107 to the right in the figure. Then, with the operator operating the crawler crane K shown in FIG. 4 working closely with the multiple workers with respect to the sliding work scaffolding 107, the multiple workers carefully remove the sling wire Ka (see two-dot chain line) shown in FIG. 6 that is located between the main girders 102 from the work scaffolding 107 and move the sling wire Ka (see two-dot chain line) from between the main girders 102. Then, the moved sling wire Ka (see two-dot chain line) is newly attached to the work scaffolding 107, resulting in the state shown by the two-dot chain line in FIG. 6. This allows the operator to remove the work scaffolding 107 by operating the crawler crane K shown in Figure 4 and pulling up the hoisting wire Ka (see the two-dot chain line). Note that the installation platform 108 shown in Figure 6 is designed to be removed after the work scaffolding 107 has been removed.

[0016] However, as explained above, such work involves danger to the lives of workers, and therefore a method for safely removing work scaffolding from a work site has been sought.

[0017] In view of the above problems, the present invention aims to provide a work scaffolding that can be safely removed, and a method for removing the work scaffolding. [Means for solving the problem]

[0018] The above object of the present invention can be achieved by the following means: Note that the parentheses indicate reference symbols of embodiments to be described later, but the present invention is not limited to these.

[0019] According to the invention of claim 1, a first work scaffolding board (2), A second work scaffolding board (3), A connecting portion (4) that connects one end (right side surface 2a) of the first work scaffolding plank (2) and one end (left side surface 3a) of the second work scaffolding plank (3), The connecting portion (4) has One end (right side surface 2a) of the first work scaffolding plank (2) is attached so that the first work scaffolding plank (2) can rotate from a horizontal state to a vertical state or from a vertical state to a horizontal state (see the direction of arrow Y1 in Figure 2(a)), and further One end (left side surface 3a) of the second work scaffolding board (3) is attached so that the second work scaffolding board (3) can rotate from a horizontal position to a vertical position or from a vertical position to a horizontal position (see the direction of arrow Y2 in Figure 2(a)).

[0020] According to the invention of claim 2, in the work scaffolding (1) described in claim 1, the connecting portion (4) is provided with horizontal state maintaining portions (first connecting retaining holes 4a2, second connecting retaining holes 4b2) so as to maintain the horizontal state of the first work scaffolding plank (2) and the second work scaffolding plank (3).

[0021] According to the invention of claim 3, in the work scaffolding (1) described in claim 1 or 2 above, the connecting portion (4) is characterized in that it is provided with vertical state maintaining portions (third connecting retaining hole 4a3, fourth connecting retaining hole 4b3) so as to maintain the vertical state of the first work scaffolding plank (2) and the second work scaffolding plank (3).

[0022] According to the invention of claim 4, in the work scaffolding (1) described in claim 1 or 2 above, the connecting portion (4) is characterized in that when the first work scaffolding plank (2) and the second work scaffolding plank (3) rotate from a vertical state to a horizontal state, a regulating portion (corresponding to the width W1a of the connecting portion 4, the width W2a of the connecting portion 4) is provided that regulates rotation so that further rotation from the horizontal state is not possible.

[0023] According to the invention of claim 5, a plurality of main beams (102) are stretched between a plurality of support legs (a plurality of second support legs 101b, a plurality of third support legs 101c), and the work scaffold (1) according to claim 1, which is installed between the plurality of support legs (plurality of second support legs 101b, third support legs 101c) in a direction perpendicular to the plurality of main girders (102), When removing the work scaffold (1), the first work scaffold plank (2) and the second work scaffold plank (3) are rotated from the horizontal state to the vertical state, and the work scaffold plank (1) is removed by passing it between the main girders (102) using the suspension wire (Ka) attached to the connecting part (4). [Effects of the Invention]

[0024] Next, the effects of the present invention will be described with reference to the drawings. Note that the reference symbols in parentheses are those of the embodiments described below, but the present invention is not limited to these.

[0025] According to the invention of claim 1, the first work scaffolding plank (2) and the second work scaffolding plank (3) are attached to the connecting part (4) so ​​that they can rotate from a horizontal state to a vertical state, or from a vertical state to a horizontal state. This allows the work scaffolding (1) to be folded freely, so that the work scaffolding (1) can be removed safely without workers having to risk their lives as in the past.

[0026] According to the invention of claim 2, the first work scaffolding plank (2) and the second work scaffolding plank (3) can be maintained in a horizontal state, making it easier to set up the work scaffolding (1).

[0027] According to the invention of claim 3, the first work scaffolding plank (2) and the second work scaffolding plank (3) can be maintained in a vertical state, making it easier to remove the work scaffolding (1).

[0028] According to the invention of claim 4, when the first work scaffolding plank (2) and the second work scaffolding plank (3) rotate from a vertical state to a horizontal state, they can be prevented from rotating further from the horizontal state, so that the first work scaffolding plank (2) and the second work scaffolding plank (3) can be easily brought into a horizontal state.

[0029] According to the invention of claim 5, the work scaffolding board (1) can be removed through the gap between the main girders (102), so that the work scaffolding (1) can be removed safely without the worker having to risk his life as in the past. [Brief explanation of the drawings]

[0030] [Figure 1] FIG. 1(a) is a perspective view of a work scaffolding according to one embodiment of the present invention, and FIG. 1(b) is a perspective view showing the state folded from the state shown in FIG. [Figure 2] (a) is a front view of the work scaffolding according to the embodiment, and (b) is an enlarged front view of the first work scaffolding board and the second work scaffolding board connected to the connecting portion shown in (a). [Figure 3]FIG. 1(a) is a perspective view illustrating a method for installing a work scaffold according to the embodiment when constructing a high-altitude work scaffolding device, and FIG. 1(b) is a perspective view illustrating a method for removing the work scaffolding after it has been installed as shown in FIG. [Figure 4] This is a perspective view illustrating a method of casting concrete into sloping ground in a high mountainous area using a high-altitude work scaffolding device. [Figure 5] FIG. 1 is a perspective view illustrating a method for installing a conventional work scaffold when constructing a high-altitude work scaffold device. [Figure 6] FIG. 1 is a perspective view illustrating a method for removing a conventional work scaffold when constructing a high-altitude work scaffold device. DETAILED DESCRIPTION OF THE INVENTION

[0031] <Explanation of work scaffolding> Hereinafter, an embodiment of the work scaffolding according to the present invention will be described in detail with reference to the drawings. In the following description, when directions such as up, down, left, and right are indicated, they refer to up, down, left, and right when viewed from the front of the illustration.

[0032] As shown in Figure 1(a), the work scaffolding 1 according to this embodiment is made up of a first work scaffolding plank 2, a second work scaffolding plank 3, and a connecting part 4. Each component will be described in detail below.

[0033] <Explanation of the first work scaffolding board> As shown in Fig. 1(a), the first work scaffolding board 2 is formed of a thick plate having a horizontally long rectangular shape. As shown in Fig. 2(b), a first scaffolding mounting hole 2b is provided in a roughly central position on the right side surface 2a of the first work scaffolding board 2, facing in the front-to-rear direction as shown in Fig. 1. Furthermore, as shown in Fig. 2(b), a first scaffolding holding hole 2c is provided in a roughly central position on the right side surface 2a of the first work scaffolding board 2, facing in the front-to-rear direction as shown in Fig. 1, slightly away from the first scaffolding mounting hole 2b to the left in the figure.

[0034] <Explanation of the second work scaffolding board> The second work scaffolding plank 3 is formed in the same shape as the first work scaffolding plank 2, and is formed from a thick plate with a horizontally long rectangular shape, as shown in Fig. 1(a). As shown in Fig. 2(b), a second scaffolding mounting hole 3b is provided in the left side surface 3a of the second work scaffolding plank 3 at approximately the center, facing in the front-to-rear direction as shown in Fig. 1. Furthermore, as shown in Fig. 2(b), a second scaffolding holding hole 3c is provided in the left side surface 3a of the second work scaffolding plank 3 at approximately the center, slightly away from the second scaffolding mounting hole 3b to the right in the figure, facing in the front-to-rear direction as shown in Fig. 1.

[0035] <Explanation of connecting parts> As shown in FIG. 1(b), the connecting portion 4 is formed in a downward U-shape, and is provided on the first work scaffolding plank 2 and the second work scaffolding plank 3 so as to cover the right side 2a of the first work scaffolding plank 2 and the left side 3a of the second work scaffolding plank 3, as shown in FIGS. 1(a) and 2(b). As shown in FIG. 2(b), the connecting portion 4 is provided with a first connecting attachment hole 4a1 on the left side 4a, extending in the front-to-rear direction as shown in FIG. 1, at a position communicating with the first scaffolding attachment hole 2b. Furthermore, as shown in FIG. 2(b), the connecting portion 4 is provided with a first connecting retaining hole 4a2 on the left side 4a, extending in the front-to-rear direction as shown in FIG. 1, at a position communicating with the first scaffolding retaining hole 2c. Furthermore, as shown in FIG. 2(b), the connecting portion 4 is provided with a third connecting retaining hole 4a3 on the lower side 4c, extending in the front-to-rear direction as shown in FIG. 1, at a position slightly downwardly spaced from the first connecting attachment hole 4a1.

[0036] On the other hand, as shown in Fig. 2(b), the connecting part 4 is provided with a second connection attachment hole 4b1 on the right side surface 4b at a position communicating with the second foothold attachment hole 3b, extending in the front-to-rear direction as shown in Fig. 1. Furthermore, as shown in Fig. 2(b), the connecting part 4 is provided with a second connection retaining hole 4b2 on the right side surface 4b at a position communicating with the second foothold retaining hole 3c, extending in the front-to-rear direction as shown in Fig. 1. Furthermore, as shown in Fig. 2(b), the connecting part 4 is provided with a fourth connection retaining hole 4b3 on the lower side surface 4c at a position slightly downwardly spaced from the second connection attachment hole 4b1, extending in the front-to-rear direction as shown in Fig. 1.

[0037] Thus, the connecting portion 4 formed in this manner connects the first work scaffolding plank 2 and the second work scaffolding plank 3 so that they can rotate.

[0038] To explain this point in more detail, as shown in FIGS. 1(a) and 2, the first work scaffolding plank 2 is placed in a horizontal position, and then, as shown in FIG. 2(b), the right side surface 2a of the first work scaffolding plank 2 is inserted into the connecting part 4. At this time, as shown in FIG. 2(b), the right side surface 2a of the first work scaffolding plank 2 is inserted into the connecting part 4 so that the first scaffolding mounting hole 2b of the first work scaffolding plank 2 communicates with the first connecting mounting hole 4a1 of the connecting part 4. Then, a pin (not shown) is inserted into the first connecting mounting hole 4a1 and the first scaffolding mounting hole 2b. As a result, the right side surface 2a of the first work scaffolding plank 2 is attached and fixed within the connecting part 4. At this time, the right side surface 2a of the first work scaffolding plank 2 is attached and fixed inside the connecting part 4 so that the first work scaffolding plank 2 can rotate approximately 90° (see arrow Y1) from a horizontal state (see the solid line portion in the figure) to a vertical state (see the dashed line portion in the figure), or from a vertical state (see the dashed line portion in the figure) to a horizontal state (see the solid line portion in the figure), as shown in Figure 2(a).In this way, the connecting part 4 connects the first work scaffolding plank 2 in a rotatable manner.

[0039] However, when the first work scaffolding board 2 is in the horizontal position shown in Figure 2(a) (see the solid line portion), if the first work scaffolding board 2 is not supported by some kind of member, it will rotate from the horizontal position (see the solid line portion) to the vertical position (see the dashed line portion) due to its own weight.

[0040] Therefore, in this embodiment, in order to maintain the first work scaffolding board 2 in the horizontal state shown in Figure 2(a) (see the solid line portion), a first scaffolding holding hole 2c is provided in the first work scaffolding board 2, and a first connecting holding hole 4a2 is provided in the connecting portion 4, as shown in Figure 2(b).

[0041] To explain this in more detail, as shown in FIG. 2(b), when the right side 2a of the first work scaffolding plank 2 is inserted into the connecting part 4 so that the first scaffolding attachment hole 2b of the first work scaffolding plank 2 communicates with the first connecting attachment hole 4a1 of the connecting part 4, the first scaffolding retaining hole 2c of the first work scaffolding plank 2 communicates with the first connecting retaining hole 4a2 of the connecting part 4. Therefore, to maintain the first work scaffolding plank 2 in the horizontal position shown in FIG. 2(a), a pin (not shown) is inserted into the first connecting retaining hole 4a2 and the first scaffolding retaining hole 2c. This pin (not shown) prevents the first work scaffolding plank 2 from rotating, so that the first work scaffolding plank 2 can be maintained in the horizontal position shown in FIG. 2(a) (see the solid line portion).

[0042] Therefore, this makes it easier to set up the work scaffolding 1, which will be described later.

[0043] On the other hand, when the first work scaffolding plank 2 is in the vertical position shown in Figure 2(a) (see the dashed line), the first work scaffolding plank 2 is not fixed, so if any external force is applied to the work scaffolding 1, the first work scaffolding plank 2 will rotate slightly in the direction of arrow Y1 and flap around. This may have some effect on the removal work of the work scaffolding 1, which will be described later.

[0044] Therefore, in this embodiment, in order to maintain the first work scaffolding board 2 in the vertical state shown in Figure 2(a) (see the dashed line portion), a first scaffolding holding hole 2c is provided in the first work scaffolding board 2, and a third connecting holding hole 4a3 is provided in the connecting portion 4, as shown in Figure 2(b).

[0045] To explain this point in more detail, as shown in Figure 2(b), when the first work scaffolding plank 2 is in the vertical position shown in Figure 2(a) (see the dashed line in the figure), the first scaffolding holding hole 2c of the first work scaffolding plank 2 comes to a position where it communicates with the third connection holding hole 4a3 of the connecting part 4. Therefore, to maintain the first work scaffolding plank 2 in the vertical position shown in Figure 2(a), a pin (not shown) is inserted into the third connection holding hole 4a3 and the first scaffolding holding hole 2c. This prevents the first work scaffolding plank 2 from rotating, so the first work scaffolding plank 2 can be maintained in the vertical position shown in Figure 2(a) (see the dashed line in the figure).

[0046] Therefore, this makes it easier to remove the work scaffolding 1, which will be described later.

[0047] In this embodiment, the width W1 of the connecting portion 4, which is located to the left of the center line O of the connecting portion 4 as shown in FIG. 2(b), is longer than the height H11 of the first work scaffold plank 2 as shown in FIG. 2(a). In this manner, when the first work scaffold plank 2 is in the vertical position as shown in FIG. 2(b) (see the dashed line portion), the connecting portion 4 protrudes to the left of the first work scaffold plank 2 as shown in FIG. 2(b). Therefore, when the first work scaffold plank 2 is rotated in the direction of arrow Y1 from the vertical position (see the dashed line portion) to the horizontal position (see the solid line portion) as shown in FIG. 2(a), the right side surface 2a of the first work scaffold plank 2, which is facing upward as shown in FIG. 2(b), rotates around the first connector mounting hole 4a1 of the connector 4 as a base point and faces right as shown in FIG. 2(b). Therefore, the right side 2a of the first work scaffolding board 2 does not rotate beyond the width W1a of the connecting part 4 and go outside the connecting part 4, so even if the first work scaffolding board 2 tries to rotate further upward from the horizontal state shown in Figure 2(a) (see the solid line part), the rotation is restricted by the width W1a of the connecting part 4.

[0048] Therefore, by doing this, the first work scaffolding board 2 can be easily brought into a horizontal state (see the solid line portion in the drawing).

[0049] On the other hand, the second work scaffold plank 3 is similar to the first work scaffold plank 2 described above, but to explain in more detail, as shown in FIGS. 1(a) and 2, the second work scaffold plank 3 is placed horizontally, and as shown in FIG. 2(b), the left side surface 3a of the second work scaffold plank 3 is inserted into the connecting part 4. At this time, as shown in FIG. 2(b), the left side surface 3a of the second work scaffold plank 3 is inserted into the connecting part 4 so that the second scaffold mounting hole 3b of the second work scaffold plank 3 communicates with the second connecting mounting hole 4b1 of the connecting part 4. Then, a pin (not shown) is inserted into the second connecting mounting hole 4b1 and the second scaffold mounting hole 3b. As a result, the left side surface 3a of the second work scaffold plank 3 is attached and fixed in the connecting part 4. At this time, the left side surface 3a of the second work scaffolding plank 3 is attached and fixed inside the connecting part 4 so that the second work scaffolding plank 3 can rotate approximately 90° (see arrow Y2) from a horizontal state (see the solid line portion in the figure) to a vertical state (see the dashed line portion in the figure) or from a vertical state (see the dashed line portion in the figure) to a horizontal state (see the solid line portion in the figure) as shown in Figure 2(a).In this way, the connecting part 4 connects the second work scaffolding plank 3 in a rotatable manner.

[0050] However, when the second work scaffolding board 3 is in the horizontal position shown in Figure 2(a) (see the solid line portion), if the second work scaffolding board 3 is not supported by some kind of member, it will rotate from the horizontal position (see the solid line portion) to the vertical position (see the dashed line portion) due to its own weight.

[0051] Therefore, in this embodiment, in order to maintain the second work scaffolding board 3 in the horizontal state shown in Figure 2(a) (see the solid line portion), a second scaffolding holding hole 3c is provided in the second work scaffolding board 3, and a second connecting holding hole 4b2 is provided in the connecting portion 4, as shown in Figure 2(b).

[0052] Explaining this in more detail, as shown in FIG. 2(b), when the left side surface 3a of the second work scaffolding plank 3 is inserted into the connecting portion 4 so that the second scaffolding mounting hole 3b of the second work scaffolding plank 3 communicates with the second connection retaining hole 4b2 of the connecting portion 4, the second scaffolding retaining hole 3c of the second work scaffolding plank 3 communicates with the second connection retaining hole 4b2 of the connecting portion 4. Therefore, to maintain the second work scaffolding plank 3 in the horizontal position shown in FIG. 2(a), a pin (not shown) is inserted into the second connection retaining hole 4b2 and the second scaffolding retaining hole 3c. This pin (not shown) prevents the second work scaffolding plank 3 from rotating, so that the second work scaffolding plank 3 can be maintained in the horizontal position shown in FIG. 2(a) (see the solid line portion).

[0053] Therefore, this makes it easier to set up the work scaffolding 1, which will be described later.

[0054] On the other hand, when the second work scaffolding plank 3 is in the vertical position shown in Figure 2(a) (see the dashed line), the second work scaffolding plank 3 is not fixed, so if any external force is applied to the work scaffolding 1, the second work scaffolding plank 3 will rotate slightly in the direction of arrow Y2 and flap around. This may have some effect on the removal work of the work scaffolding 1, which will be described later.

[0055] Therefore, in this embodiment, in order to maintain the second work scaffolding board 3 in the vertical state shown in Figure 2(a) (see the dashed line portion), a second scaffolding holding hole 3c is provided in the second work scaffolding board 3, and a fourth connecting holding hole 4b3 is provided in the connecting portion 4, as shown in Figure 2(b).

[0056] To explain this point in more detail, as shown in Figure 2(b), when the second work scaffold plank 3 is in the vertical position shown in Figure 2(a) (see the dashed line in the figure), the second scaffold holding hole 3c of the second work scaffold plank 3 comes to a position where it communicates with the fourth connection holding hole 4b3 of the connecting part 4. Therefore, to maintain the second work scaffold plank 3 in the vertical position shown in Figure 2(a), a pin (not shown) is inserted into the fourth connection holding hole 4b3 and the second scaffold holding hole 3c. This prevents the second work scaffold plank 3 from rotating, so the second work scaffold plank 3 can be maintained in the vertical position shown in Figure 2(a) (see the dashed line in the figure).

[0057] Therefore, this makes it easier to remove the work scaffolding 1, which will be described later.

[0058] In this embodiment, the width W2 of the connecting portion 4 located to the right of the center line O of the connecting portion 4 as shown in FIG. 2(b) is longer than the height H2 of the second work scaffold plank 3 as shown in FIG. 2(a). In this manner, when the second work scaffold plank 3 is in the vertical position as shown in FIG. 2(b) (see the dashed line portion), the connecting portion 4 protrudes to the right of the second work scaffold plank 3 as shown in FIG. 2(b). Therefore, when the second work scaffold plank 3 is rotated in the direction of arrow Y2 from the vertical position (see the dashed line portion) to the horizontal position (see the solid line portion) as shown in FIG. 2(a), the left side surface 3a of the second work scaffold plank 3, which is facing upward as shown in FIG. 2(b), rotates about the second connection mounting hole 4b1 of the connecting portion 4 as a base point and faces left as shown in FIG. 2(b). Therefore, the left side surface 3a of the second work scaffolding board 3 does not exceed the width W2a of the connecting portion 4 and go outside the connecting portion 4 when rotated, so even if the second work scaffolding board 3 attempts to rotate further upward from the horizontal state shown in Figure 2(a) (see the solid line portion), the rotation is restricted by the width W2a of the connecting portion 4.

[0059] Therefore, by doing this, the second work scaffolding board 3 can be easily brought into a horizontal state (see the solid line portion in the drawing).

[0060] The above is a description of the work scaffolding 1 according to this embodiment.

[0061] <Explanation of examples of use of work scaffolding> Next, an example of how to use the work scaffolding 1 according to this embodiment described above will be described. Specifically, a method for installing or removing the work scaffolding 1 according to this embodiment when constructing the high-altitude work scaffolding device 100 shown in Fig. 4 will be described.

[0062] First, a method for setting up the work scaffolding 1 will be described.

[0063] As shown in FIG. 3(a), work scaffolding 1 is installed on an L-shaped installation stand 108 at regular intervals in multiple vertical stages so as to connect the multiple second support legs 101b, and work scaffolding 1 is also installed on the L-shaped installation stand 108 at regular intervals in multiple vertical stages so as to connect the multiple third support legs 101c. For this installation, as shown in FIG. 3(a), the first work scaffolding plank 2 and the second work scaffolding plank 3 are suspended by hoisting wires Ka, so that the first work scaffolding plank 2 and the second work scaffolding plank 3 are in a horizontal position. In this state, an operator operating a crawler crane K shown in FIG. 4 moves the work scaffolding 1 suspended by the hoisting wires Ka to a predetermined position, and multiple workers waiting at that position detach the hoisting wires Ka from the work scaffolding 1 and install it in the predetermined position.

[0064] Thus, the work scaffolding 1 can be set up in this manner. When suspending the work scaffolding 1 from the hoisting wire Ka, a pin (not shown) can be inserted into the first connection holding hole 4a2 and the first scaffold holding hole 2c shown in FIG. 2(b), and a pin (not shown) can also be inserted into the second connection holding hole 4b2 and the second scaffold holding hole 3c shown in FIG. 2(b). This allows the first work scaffolding plank 2 and the second work scaffolding plank 3 to be maintained in a horizontal position, so the work scaffolding 1 can be reliably moved to the predetermined position while maintaining the first work scaffolding plank 2 and the second work scaffolding plank 3 in a horizontal position. This has the effect of facilitating the installation of the work scaffolding 1.

[0065] On the other hand, if it is not necessary to reliably maintain the horizontal state of the first work scaffolding board 2 and the second work scaffolding board 3, but it is better to maintain them in a horizontal state just to be safe, after installing the work scaffolding 1 in the designated position, pins not shown can be inserted into the first connecting retaining hole 4a2 and the first scaffolding retaining hole 2c shown in Figure 2(b), and further pins not shown can be inserted into the second connecting retaining hole 4b2 and the second scaffolding retaining hole 3c shown in Figure 2(b) to maintain the horizontal state of the first work scaffolding board 2 and the second work scaffolding board 3.

[0066] Next, a method for removing the work scaffolding 1 will be described.

[0067] When removing the work scaffolding 1 installed as described above, first, pins (not shown) are inserted into the first connecting retaining hole 4a2 and the first scaffolding retaining hole 2c shown in Figure 2(b), and if pins (not shown) have been inserted into the second connecting retaining hole 4b2 and the second scaffolding retaining hole 3c, multiple workers will pull out the pins.

[0068] Then, as shown in Figure 3(b), a hoisting wire Ka is inserted between the main girders 102, and multiple workers attach the hoisting wire Ka to the connecting parts 4. After that, when an operator operates the crawler crane K shown in Figure 4 and pulls the work scaffolding 1 upward in the figure, the first work scaffolding plank 2 and the second work scaffolding plank 3 rotate due to their own weight from a horizontal position (see the solid line portion in the figure) to a vertical position (see the dashed line portion in the figure), as shown in Figure 2(a). This causes the work scaffolding 1 to enter a folded state, as shown in Figures 1(b) and 3(b).

[0069] Therefore, by doing this, the possibility of the work scaffolding 1 hitting between the main girders 102 when it is pulled up, as was the case in the past, is reduced, and the work scaffolding 1 can be removed by passing through between the main girders 102.

[0070] Incidentally, when the folded work scaffolding 1 is pulled up by the hoisting wire Ka, as explained above, the first work scaffolding plank 2 may rotate slightly in the direction of arrow Y1 (see FIG. 2(a)) and flap, or the second work scaffolding plank 3 may rotate slightly in the direction of arrow Y2 (see FIG. 2(a)) and flap. Therefore, to prevent this flapping, it is preferable to insert pins (not shown) into the third connecting retaining hole 4a3 and the first scaffolding retaining hole 2c shown in FIG. 2(b), and further insert pins (not shown) into the fourth connecting retaining hole 4b3 and the second scaffolding retaining hole 3c shown in FIG. 2(b) to maintain the first work scaffolding plank 2 and the second work scaffolding plank 3 in a vertical position. This allows the work scaffolding 1 to be easily removed. To insert this pin (not shown), the operator operates the crawler crane K shown in Figure 4 after folding the work scaffolding 1, and moves the folded work scaffolding 1 to a location where multiple workers are waiting, and then has the multiple workers insert the pin (not shown) at that location.

[0071] Therefore, by using the work scaffolding 1 described above, the work scaffolding 1 can be removed safely without the worker having to risk his life as in the past.

[0072] <Description of Modifications> The above detailed description is of the work scaffold 1 and its use example in this embodiment. However, the shapes and the like shown in this embodiment are merely examples, and various modifications and changes are possible within the scope of the gist of the present invention as set forth in the claims. For example, in this embodiment, an example of constructing an aerial work scaffold device 100 has been described, but since the work scaffold 1 is also necessary when dismantling the aerial work scaffold device 100, it is also applicable to that case.

[0073] Furthermore, in this embodiment, an example has been shown in which pins (not shown) are inserted into the first connection retaining hole 4a2 and the first scaffolding retaining hole 2c shown in FIG. 2(b) and further pins (not shown) are inserted into the second connection retaining hole 4b2 and the second scaffolding retaining hole 3c shown in FIG. 2(b) to maintain the horizontal state of the first work scaffolding plank 2 and the second work scaffolding plank 3. However, any method may be used as long as it can maintain the horizontal state of the first work scaffolding plank 2 and the second work scaffolding plank 3. For example, it is also possible to insert pins (not shown) into the first connection retaining hole 4a2 and the second connection retaining hole 4b2 without providing the first scaffolding retaining hole 2c and the second scaffolding retaining hole 3c, and then directly attach the first work scaffolding plank 2 and the second work scaffolding plank 3 using an impact driver or the like. However, the method shown in this embodiment is preferable because it allows the first work scaffolding plank 2 and the second work scaffolding plank 3 to be maintained in a simple and easy horizontal state.

[0074] Furthermore, in this embodiment, an example has been shown in which pins (not shown) are inserted into the third connection retaining hole 4a3 and the first scaffolding retaining hole 2c shown in FIG. 2(b) and further pins (not shown) are inserted into the fourth connection retaining hole 4b3 and the second scaffolding retaining hole 3c shown in FIG. 2(b) to maintain the first work scaffolding plank 2 and the second work scaffolding plank 3 in a vertical position. However, any method may be used as long as it can maintain the first work scaffolding plank 2 and the second work scaffolding plank 3 in a vertical position. For example, it is also possible to insert pins (not shown) into the third connection retaining hole 4a3 and the fourth connection retaining hole 4b3 without providing the first scaffolding retaining hole 2c and the second scaffolding retaining hole 3c, and then directly attach the first work scaffolding plank 2 and the second work scaffolding plank 3 using an impact driver or the like. However, the method shown in this embodiment is preferred because it allows the first work scaffolding plank 2 and the second work scaffolding plank 3 to be maintained in a vertical position simply and easily. [Explanation of symbols]

[0075] 1. Work scaffolding 2. First work scaffolding board 2a Right side (one end) 3. Second work scaffolding board 3a Left side (one end) 4 Connecting part 4a2 First connection holding hole (horizontal state maintaining part) 4b2 Second connection holding hole (horizontal state maintaining part) 4a3 Third connection holding hole (vertical state maintaining part) 4b3 Fourth connection holding hole (vertical state maintaining part) W1a Width (restriction part) W2a Width (restriction part) 100 Scaffolding equipment for high-altitude work 101b Second support leg (support leg) 101c Third support leg (support leg) 102 Main girder Ka Hanging Wire

Claims

1. A first work scaffolding board; A second work scaffolding board; A connecting portion that connects one end of the first work scaffolding plank and one end of the second work scaffolding plank, The connecting portion has One end of the first work scaffold board is attached so that the first work scaffold board can rotate from a horizontal state to a vertical state or from a vertical state to a horizontal state; and A work scaffold having one end of the second work scaffold board attached so that the second work scaffold board can rotate from a horizontal position to a vertical position or from a vertical position to a horizontal position.

2. The work scaffold according to claim 1, wherein the connecting portion is provided with a horizontal state maintaining portion so as to maintain the horizontal state of the first work scaffold plank and the second work scaffold plank.

3. 3. The work scaffolding according to claim 1 or 2, wherein the connecting portion is provided with a vertical state maintaining portion so as to maintain the vertical state of the first work scaffolding board and the second work scaffolding board.

4. 3. A work scaffold as described in claim 1 or 2, wherein the connecting portion is provided with a restricting portion that restricts rotation so that when the first work scaffold board and the second work scaffold board rotate from a vertical state to a horizontal state, they cannot rotate further from the horizontal state.

5. A plurality of main girders suspended between a plurality of support legs; 2. A method for removing a working scaffold in an elevated work scaffolding device having the working scaffolding according to claim 1, which is installed between the plurality of support legs in a direction perpendicular to the plurality of main girders, A method for removing the work scaffolding, in which, when removing the work scaffolding, the first work scaffolding board and the second work scaffolding board are rotated from the horizontal state to the vertical state, and the work scaffolding boards are then removed by passing them between the main girders using a suspension wire attached to the connecting part.

Images