Scaffolding device for chimney construction equipped with crane

Abstract

To provide a scaffolding device for chimney construction, the device capable of significantly preventing stress applied to support columns supporting a tower crane.SOLUTION: A scaffolding device for chimney construction comprises three or more masts capable of moving up and down, a stage connected to an upper end of each mast and positioned to be supported by each mast, a plurality of support columns erected on the stage and having the same number as the number of masts, and a horizontal beam member positioned on the plurality of support columns so as to fix the plurality of support columns to each other. A first support column among the support columns extends upward penetrating the horizontal beam member, and a crane is positioned on the top part of the first support column.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a scaffolding device for chimney construction that is equipped with a crane. [Background technology]

[0002] Generally, when construction work is carried out on a chimney, such as the construction, repair, or demolition of a chimney, scaffolding is erected around the chimney.

[0003] Scaffolding is assembled using, for example, multiple liftable members called "masts" (Patent Document 1). For example, by connecting a horizontal work stage to the masts and raising and lowering these masts to a predetermined height, the horizontal stage can be placed at a predetermined position on the chimney. This also allows workers on the horizontal stage to build various types of scaffolding around the chimney.

[0004] In addition to the mast, a tower crane is also constructed at the chimney construction site to lift and lower construction materials and / or temporary equipment. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-224439 Summary of the Invention [Problem to be solved by the invention]

[0006] At conventional chimney construction sites, tower cranes are supported by a single pillar that can be raised and lowered. To provide horizontal support, stays, which extend horizontally and contact the outer periphery of the chimney, are installed at predetermined intervals along the height of the chimney.

[0007] However, this type of tower crane support can cause large stresses, especially at the top of the columns. For example, during strong winds or earthquakes, large bending moments and shear forces are generated in the top stay and the stay just below it. Similar stresses are also generated in the columns between these stays.

[0008] The occurrence of such a large stress is undesirable from a safety standpoint.

[0009] The present invention has been made in consideration of the above background, and aims to provide a scaffolding device for chimney construction that can significantly reduce the stress applied to the members supporting the tower crane. [Means for solving the problem]

[0010] In the present invention, A scaffolding device for chimney construction, Three or more masts that can be raised and lowered in the vertical direction, a stage disposed at the upper end of each of the masts so as to be connected to and supported by each of the masts; a plurality of columns erected on the stage, the number of which is equal to the number of the masts; a horizontal beam member disposed on the plurality of columns so as to secure the plurality of columns to one another; and A scaffolding device for chimney construction is provided in which a first of the pillars extends upward through the horizontal beam member and a crane is positioned on top of the first pillar. [Effects of the Invention]

[0011] The present invention can provide a scaffolding device for chimney construction that can significantly reduce the stress applied to the members supporting the tower crane. [Brief explanation of the drawings]

[0012] [Figure 1] 1 shows a schematic side view of a scaffolding device according to one embodiment of the present invention; [Figure 2] FIG. 2 is a diagram schematically illustrating a cross section taken along line AA in FIG. [Figure 3] FIG. 2 is a diagram schematically illustrating a cross section taken along line BB in FIG. [Figure 4] FIG. 2 is a schematic diagram showing an enlarged view of the top portion of a scaffolding device according to an embodiment of the present invention; [Figure 5] 2 shows a schematic side view of a scaffolding apparatus according to an embodiment of the present invention, with the stage in a different position than the example shown in FIG. 1; [Figure 6] FIG. 6 is a diagram schematically illustrating a cross section taken along line CC in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] In one embodiment of the present invention, A scaffolding device for chimney construction, Three or more masts that can be raised and lowered in the vertical direction, a stage disposed at the upper end of each of the masts so as to be connected to and supported by each of the masts; a plurality of columns erected on the stage, the number of which is equal to the number of the masts; a horizontal beam member disposed on the plurality of columns so as to secure the plurality of columns to one another; and A scaffolding device for chimney construction is provided in which a first of the pillars extends upward through the horizontal beam member and a crane is positioned on top of the first pillar.

[0015] As mentioned above, at conventional chimney construction sites, tower cranes are supported by a single pillar member that can be raised and lowered. In addition, this pillar member is provided with members called stays that extend horizontally and abut against the outer periphery of the chimney for horizontal support, at predetermined intervals along the height of the chimney.

[0016] However, this tower crane support method can cause large stresses, especially in the upper part of the column members. For example, during strong winds or earthquakes, large bending moments and shear forces are generated in the top stay (hereinafter referred to as the "first crane stay") and the stay immediately below it (hereinafter referred to as the "second crane stay"). Similar stresses are also generated in the column members at positions between these stays.

[0017] The occurrence of such a large stress is undesirable from a safety standpoint.

[0018] In contrast, in one embodiment of the present invention, at least one of the multiple columns constructed on the stage is used as a column for a tower crane. Hereinafter, such a column will be referred to as a "crane column." The columns are connected to each other via horizontal beam members.

[0019] In this configuration, the crane support is connected to other support columns via a stage, so that in one embodiment of the present invention, stresses experienced by the crane support column can be distributed to the other support columns and further to the masts below each support column.

[0020] Therefore, in the scaffolding device according to one embodiment of the present invention, the stress applied to the crane support can be significantly reduced compared to when a single tower crane support extending from the ground as in the conventional case is used.

[0021] In addition, in the scaffolding system according to one embodiment of the present invention, at least one of the columns is used as a crane column, so there is no need to construct a separate column member dedicated to a tower crane as in the past. Therefore, with the scaffolding system according to one embodiment of the present invention, it is possible to obtain the effect of significantly reducing the cost of assembling the scaffolding.

[0022] In particular, the column members for conventional tower cranes must be extremely strong so as to withstand maximum stress, but the scaffolding device according to one embodiment of the present invention can significantly reduce the costs incurred by using such strong members.

[0023] (Configuration of a scaffolding device according to one embodiment of the present invention) A scaffolding device according to one embodiment of the present invention will be described in more detail below with reference to Figures 1 to 4. In the following description, the configuration and features of the scaffolding device according to one embodiment of the present invention will be described using the example of dismantling a chimney. However, it will be clear to those skilled in the art that the scaffolding device according to one embodiment of the present invention can also be applied when constructing or repairing a chimney.

[0024] Fig. 1 shows a schematic side view of a scaffolding device according to one embodiment of the present invention (hereinafter simply referred to as "scaffolding device"). Fig. 2 shows a schematic cross-sectional view taken along line AA in Fig. 1. Fig. 3 shows a schematic cross-sectional view taken along line BB in Fig. 1.

[0025] Fig. 1 shows a state in which a scaffolding system 100 is constructed around a construction chimney 1. The chimney 1 has a height of, for example, more than 100 m. Fig. 1 also shows a state in which the scaffolding system 100 is arranged at the bottom in the vertical direction (i.e., the initial configuration state of the scaffolding system 100).

[0026] 1, the scaffolding device 100 has a plurality of masts 120, a stage 130, a plurality of support columns 140, and a horizontal beam member 150. Here, as an example, the number of masts 120 is assumed to be three, and they will also be referred to as a "first mast 121" to a "third mast 123."

[0027] Each mast 120 is connected to a height adjustment device 160. The height adjustment device 160 is used to connect multiple mast blocks to construct a mast 120 that extends upward, or conversely, to remove a mast block from the mast 120 and lower the mast 120 downward. In other words, by using the height adjustment device 160, each mast 120 and even the stage 130 can be raised and lowered above the height adjustment device 160.

[0028] The configurations of the height adjustment device 160 and the mast 120 are described in more detail in, for example, Japanese Patent Application Laid-Open No. 2014-224439. Therefore, the configurations of the mast 120 and the height adjustment device 160 will not be described further here.

[0029] 2, the masts 120 are arranged in rotational symmetry with respect to the center C of the chimney 1 when viewed from above. Therefore, in the case where there are three masts as in this example, the angle θ in FIG. 2 is 60°.

[0030] The stage 130 is supported by each mast 120. Specifically, the stage 130 is connected to each mast 120 at the upper end of each mast 120.

[0031] As shown in FIG. 2, the stage 130 has a main floor member 132 supported on the upper ends of the masts 120 and a plurality of horizontal support members 134 .

[0032] The main floor member 132 has an opening in the center so that the chimney 1 can pass through. The main floor member 132 serves as a "floor" on which workers perform various tasks.

[0033] Furthermore, each horizontal support member 134 is disposed radially toward the chimney 1 so as to abut against the outer periphery of the chimney 1. The horizontal support members 134 can suppress lateral shaking of each mast 120 and the stage 130. A roller may be installed on the tip side of each horizontal support member 134 that abuts against the chimney 1.

[0034] 2, a total of 12 horizontal support members 134 are arranged at equal intervals around the circumference. However, it should be noted that the number of horizontal support members 134 and their arrangement intervals are not particularly limited.

[0035] The columns 140 are disposed on the main floor member 132 of the stage 130. The number of columns 140 is the same as the number of masts 120.

[0036] 3, the columns 140 are preferably arranged at positions overlapping the corresponding masts 120 in top view. In this case, each column 140 can be interconnected with the corresponding masts 120 via the stage 130.

[0037] A horizontal beam member 150 is installed on top of the support columns 140. The horizontal beam member 150 serves to fix the support columns 140 to each other.

[0038] As shown in Fig. 3, the horizontal beam member 150 is configured to surround the chimney 1. The horizontal beam member 150 may be configured by combining multiple members. For example, in the example shown in Fig. 3, the horizontal beam member 150 is configured by combining six plate members 152 of the same shape and dimensions to form a hexagon. Furthermore, in this case, the horizontal beam member 150 may be configured such that a support 140 is disposed at the center position of each of every other three plate members 152 when viewed from above.

[0039] 3 is merely an example, and the horizontal beam member 150 may have any configuration as long as the struts 140 are fixed to each other. For example, the horizontal beam member 150 may be configured to combine five or seven or more plate members 152 to form a pentagon or a polygon with more than two sides.

[0040] Furthermore, handrails may be installed on the horizontal beam member 150. In this case, workers can stand on the horizontal beam member 150 and move around on the horizontal beam member 150.

[0041] FIG. 4 shows a schematic enlarged view of the top portion of the scaffolding device 100.

[0042] 4, at least one of the columns 140 is used as a "crane column" (hereinafter referred to as 140C). That is, the crane column 140C penetrates the horizontal beam member 150 and extends further upward, and a tower crane 170 is installed on the top of the crane column 140C.

[0043] In this way, when at least one of the columns 140 is used as a crane column 140C, the crane column 140C is connected to the other columns 140 via the stage 130 and the horizontal beam member 150, so that the stress that the crane column 140C receives can be distributed to the other columns 140. As a result, the stress that is applied to the crane column 140C can be significantly suppressed.

[0044] Furthermore, by using at least one of the columns 140 as the crane column 140C, it becomes unnecessary to provide a separate column for the tower crane, and the cost of assembling the scaffolding can be significantly reduced.

[0045] The overall length of the support 140, that is, the distance L between the stage 130 and the horizontal beam member 150 shown in FIG. 4, is preferably in the range of 5 m to 20 m.

[0046] By setting this distance L to 20 m or less, the effect of suppressing the bending moment acting on the crane support 140C can be further improved.

[0047] Furthermore, in the crane column 140C, the distance S (see FIG. 4) from the horizontal beam member 150 to the upper end of the crane column 140C is preferably in the range of 5 m to 20 m. By setting this distance S to 20 m or less, the effect of suppressing the bending moment acting on the crane column 140C can be further improved.

[0048] Other features of the scaffolding device according to one embodiment of the present invention Next, other configurations and features that a scaffolding device according to one embodiment of the present invention may have will be described with reference to Figures 5 and 6. Note that here, additional aspects will be described using the scaffolding device 100 described above as an example of a scaffolding device according to one embodiment of the present invention. Therefore, the reference symbols used in Figures 1 to 4 will be used to represent the respective components of the scaffolding device.

[0049] Figure 5 shows a side view of the scaffolding apparatus 100 with the stage 130 in a raised position compared to the position shown in Figure 1. In particular, in the example shown in Figure 5, the stage 130 of the scaffolding apparatus 100 is in its highest position.

[0050] As shown in FIG. 5, stays 129 may be installed on each mast 120 at predetermined intervals along the height direction.

[0051] By providing such stays 129, it becomes possible to significantly suppress lateral vibration of each mast 120.

[0052] As described above, in the conventional support method for tower cranes, large stresses are generated in the first crane stay and second crane stay provided on the pillar member, as well as in the portion of the pillar member between them.

[0053] However, in the scaffolding device 100 shown in Figure 5, the stage 130 and the horizontal stays 129 provided on each mast 120 directly below it can further distribute the stress that occurs particularly above the crane support 140C.

[0054] Next, FIG. 6 is a schematic cross-sectional view taken along line CC in FIG.

[0055] The scaffolding device 100 can be used for the new construction, repair, and demolition of various chimneys. Some applicable chimneys have a structure in which the diameter decreases toward the top, such as the chimney 1 shown in FIGS. 1 and 4. In such cases, the higher the height position of the stage 130 of the scaffolding device 100 from the ground, the greater the distance between the main floor member 132 of the stage 130 and the outer periphery of the chimney 1. This can make it difficult for workers on the main floor member 132 to approach the chimney 1.

[0056] To address such a problem, the stage 130 of the scaffolding apparatus 100 may further include a support floor member 138, as shown in FIG.

[0057] There are no particular limitations on the configuration of the auxiliary floor member 138. The auxiliary floor member 138 may be configured by combining a plurality of floor plates 139, for example.

[0058] For example, in the example shown in Figure 6, a total of 12 floor plates 139 protruding horizontally from the inner end of the main floor member 132 are connected to each other circumferentially to form an auxiliary floor member 138 that surrounds the outer periphery of the chimney 1.

[0059] The auxiliary floor members 138 are installed in the stage 130 to construct an additional work floor between the main floor members 132 and the periphery of the chimney 1. In other words, by providing the auxiliary floor members 138, workers can approach the chimney 1 even if the height position of the stage 130 relative to the chimney 1 changes.

[0060] In practice, each time the stage 130 rises to a predetermined height relative to the chimney 1, floor plates 139 are modified or added so that the area of ​​the auxiliary floor member 138 increases, and before the stage 130 descends to a predetermined height relative to the chimney 1, floor plates 139 are modified or removed so that the area of ​​the auxiliary floor member 138 decreases.

[0061] As shown in FIG. 6, the above-mentioned horizontal support members 134 may be provided on the auxiliary floor member 138 at predetermined intervals.

[0062] Normally, the tower crane 170 is operated by wireless instructions from a control panel on the ground. However, in the case of a large chimney 1 exceeding 100 m in height, when the scaffolding device 100 is arranged as shown in Fig. 5, it may be difficult to send and receive accurate information between the tower crane 170 and the control panel on the ground (a so-called communication trouble problem).

[0063] In contrast, in one embodiment of the present invention, a control panel can be installed above the stage 130 (see, for example, control panel 190 in FIG. 4).

[0064] In this case, the distance between the operation panel 190 and the tower crane 170 can be significantly shortened regardless of the height position of the stage 130. Therefore, it is possible to significantly suppress or avoid the occurrence of communication problems that can occur during the construction of large chimneys, as in the past.

[0065] The scaffolding device according to one embodiment of the present invention has been described above using the scaffolding device 100 as an example. However, the scaffolding device according to one embodiment of the present invention is not limited to the above-described configuration.

[0066] For example, in the above configuration, the scaffolding device 100 has three masts 120 and three corresponding columns 140, and one of the columns 140 is used as a crane column 140C.

[0067] However, the scaffolding apparatus 100 may alternatively have four or more masts 120 and a corresponding number of columns 140. In this case, one or two of the four columns 140 may be used as crane columns 140C.

[0068] In the above description, all three columns 140 of the scaffolding system 100 are made of the same material. However, this is merely an example, and the columns 140 may be made of different materials as long as they comply with the crane operating standards. For example, the crane column 140C may be made of a different material from the other two columns 140.

[0069] It will be apparent to those skilled in the art that various other modifications are possible. [Explanation of symbols]

[0070] 1. Chimney 100 Scaffolding Equipment 120 Mast 121 First Mast 122 Second Mast 123 Third Mast 129 Horizontal stay 130 stages 132 Main floor components 134 Horizontal support member 138 Auxiliary floor member 139 Floorboards 140 Post 140C Crane Support 150 Horizontal beam member 152 Board material 160 Height adjustment device 170 Tower Crane 190 Control panel

Claims

1. A scaffolding device for chimney construction, Three or more masts that can be raised and lowered in the vertical direction; a stage disposed at the upper end of each of the masts so as to be connected to and supported by each of the masts; a plurality of columns erected on the stage, the number of which is equal to the number of the masts; a horizontal beam member disposed on the plurality of columns so as to secure the plurality of columns to one another; and A scaffolding device for chimney construction, wherein a first of the supports extends upward through the horizontal beam member, and a crane is positioned on top of the first support.

2. 2. The scaffolding device for chimney construction according to claim 1, wherein the distance between the stage and the horizontal beam member is in the range of 5 m to 20 m.

3. 3. The scaffolding device for chimney construction according to claim 1 or 2, wherein the crane is a tower crane.

4. 3. A scaffolding device for chimney construction according to claim 1 or 2, wherein each support is arranged on a corresponding mast when viewed from above.

5. 3. The scaffolding system for chimney construction according to claim 1, wherein a control panel for operating the crane is disposed on the stage.

6. 3. A scaffolding device for chimney construction according to claim 1 or 2, wherein handrails are installed on the horizontal beam members.

7. The stage is a primary floor member disposed on the masts and connected to each mast; a plurality of horizontal support members; and 3. A scaffolding device for chimney construction according to claim 1 or 2, wherein each horizontal support member is arranged radially toward the chimney so as to abut against the outer periphery of the chimney.

8. The stage further comprises: an auxiliary floor member whose opening size is adjusted to correspond to the diameter of the chimney; The scaffolding device for chimney construction according to claim 1 or 2, comprising:

9. 3. The scaffolding device for chimney construction according to claim 1, wherein there are three masts.

10. 3. The scaffolding device for chimney construction according to claim 1, wherein there are four masts.

11. 11. A scaffolding device for chimney construction according to claim 10, wherein a second one of the supports extends through the horizontal beam member, and a second crane is positioned on top of the second support.

12. 3. The scaffolding device for chimney construction according to claim 1 or 2, wherein the chimney has a height of 100 m or more.

Images