Ladders and buildings

Abstract

To provide ladders and buildings that can reduce the impact on the appearance of the building. [Solution] A ladder 4, installed along the outer wall 2 of a building 1 to lead to the rooftop, comprises a ladder section 5 and a drainage section 6 provided on the ladder section 5. The ladder section 5 has a support column 11 and a plurality of steps 21 provided on the support column 11. The support column 11 has a recess 12. The recess 12 is configured so that the steps 21 are housed within the recess 12.

Description

Technical Field

[0006] , ,

[0005] , , , ,

[0001] The present disclosure relates to ladders and buildings.

Background Art

[0002] When a disaster occurs, the rooftop of a building can be used as a temporary evacuation site. As a method of evacuating to the rooftop of a building, a tall stepladder may be used. However, tall stepladders are used in few scenarios and are difficult to store. Therefore, few people have tall stepladders for disasters. As another method of evacuating to the rooftop, a method of using a rain gutter is known. Patent Document 1 discloses an evacuation elevator and rain gutter provided with a plurality of steps on a vertical gutter.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the steps provided on the vertical gutter disclosed in Patent Document 1 are visually recognized together with the vertical gutter. Therefore, there is a risk that the steps provided on the rain gutter may affect the appearance of the building.

Means for Solving the Problems

[0005] (1) The ladder for solving the above problems is a ladder provided along the outer wall of a building so as to connect to the rooftop, and includes a ladder part and a drainage part provided on the ladder part. The ladder part has a support part and a plurality of steps provided on the support part. The support part has a concave part, and the concave part is configured such that the steps are stored in the concave part.

[0006] With this configuration, the ladder can drain rainwater from the rooftop via the drainage section. This allows the ladder to function as a downpipe. In addition, the steps are stored within recesses in the support columns. This reduces the impact of the steps on the building's appearance.

[0007] (2) In the ladder described in (1) above, the drainage section is provided inside the support column. With this configuration, rainwater can be drained by the support column of the ladder.

[0008] (3) In the ladder described in (2) above, the support column comprises a support column body extending in the height direction of the outer wall, the recess is provided so as to be along the longitudinal direction of the support column body, and the opening of the recess is provided so as to be in a direction that intersects the vertical direction and is oriented in the horizontal direction along the outer wall, and the step is provided in the recess so that when the step is extended the step body is oriented in the horizontal direction.

[0009] In this configuration, the steps unfold along the side. This makes it easier to climb the ladder.

[0010] (4) In the ladder described in (3) above, the drainage section is provided within the recess. With this configuration, the drainage section is provided integrally with the recess. This reduces the effort required to provide the drainage section compared to the case where the drainage section is provided outside the recess.

[0011] (5) In the ladder described in (4) above, the main body of the support column comprises a first plate portion extending in the height direction of the outer wall, a second plate portion extending in the height direction of the outer wall and arranged parallel to the first plate portion, and a connecting portion extending in the height direction of the outer wall and connecting the first plate portion and the second plate portion, and the recess comprises a first inner surface of the first plate portion, a second surface of the second plate portion facing the first surface, and a side surface of the connecting portion.

[0012] With this configuration, a recess can be provided in the support column by the first plate portion, the second plate portion, and the connecting portion. This makes it easy to create a recess in the support column.

[0013] (6) In the ladder described in any one of (3) to (5) above, when the step is stored in the recess, it is located inward from the opening of the recess in a plan view. With this configuration, the step is not visible in a front view. This reduces the impact of the step on the appearance of the building.

[0014] (7) In the ladder described in (6) above, the steps are rotatably attached to the support columns. With this configuration, the steps can be stored in or extended out of the recesses.

[0015] (8) A ladder according to any one of (3) to (7) above, further comprising a step operating unit for operating the step, wherein the step operating unit stores the step in the recess or extends it out of the recess.

[0016] With this configuration, the steps can be retracted or extended by operating the step control unit.

[0017] (9) In the ladder described in (8) above, the step operating section comprises a step operating section body, a step support section provided on the step operating section body to support the step, and an operating section provided on the step operating section body to operate the step operating section body, wherein the step support section moves when the operating section is operated, and the step is stored in the recess or deployed outside the recess when the step support section moves.

[0018] With this configuration, the step can be stored in or extended on the support column by moving the step support part of the step operation unit using the operation unit.

[0019] (10) In the ladder described in (9) above, the step operating unit body is positioned such that the step support unit is in contact with the lower surface of the step with respect to the support column, the step support unit moves up and down by the operating unit, the step is stored in the recess when the step support unit moves upward, and is extended out of the recess when the step support unit moves downward.

[0020] In this configuration, the step is stored in or unfolded outside the recess of the support column by the vertical movement of the step support.

[0021] (11) In the ladder described in (10) above, when the step is stored in the recess, it is supported by the step support so as to be inclined upward toward the opening. With this configuration, the step is extended by its own weight when the step support moves downward.

[0022] (12) The ladder described in (11) above is further provided with a fixing jig for fixing the step operating part so that the step support part is maintained in a first position, the first position being the position of the step support part such that the step is placed in a storage position in which the step is stored in the recess. With this configuration, the stored state of the step is maintained by the fixing jig.

[0023] (13) The ladder described in (12) above is further provided with a step support reinforcement that supports the step so that the step is maintained in the extended position. With this configuration, the extended state of the step is maintained by the step support reinforcement.

[0024] (14) In the ladder described in any one of (7) to (13) above, in the arrangement of the steps when the steps are extended from the recesses, the ends of the steps are curved such that the end faces of the ends of the steps face upward. This configuration reduces the likelihood of a person's feet protruding from the steps when climbing the ladder.

[0025] (15) In the ladder according to any one of (3) to (14) above, the recess has a bottom surface portion on the side opposite to the opening portion in the lateral direction, the drainage portion includes a drainage guide member disposed between the bottom surface portion and the step within the recess, and the drainage guide member partitions the space within the recess into a drainage space portion on the bottom surface portion side and a step storage portion on the opening portion side. According to this configuration, the drainage portion can drain the rainwater that has flowed into the drainage portion by the drainage guide member. Thereby, compared with the case where the drainage guide member is not provided, the rainwater that has flowed into the drainage portion can be drained more smoothly.

[0026] (16) In the ladder according to (15) above, a plurality of the drainage guide members are provided along the vertical direction within the recess of the support column portion. According to this configuration, a plurality of the drainage guide members are provided within the recess along the vertical direction of the support column portion. For this reason, a plurality of gaps are provided in the drainage portion. Thereby, air can be allowed to enter and exit inside and outside the drainage portion.

[0027] (17) In the ladder according to (1) above, the drainage guide member has an upper end and a lower end, and the upper end is located closer to the opening portion of the recess than the lower end in the lateral direction.

[0028] In this configuration, the drainage area enclosed by the recess and the drainage guide member narrows from the upper end to the lower end of the drainage guide member. Therefore, in the drainage area, the inlet for rainwater is larger than the outlet for rainwater. In addition, since multiple drainage guide members are provided along the vertical direction, multiple drainage areas are connected vertically. Of the two drainage areas arranged vertically, the outlet of the upper drainage area is smaller than the inlet of the lower drainage area, so water flows smoothly from the upper drainage area to the lower drainage area. Furthermore, the difference in size between the outlet of the upper drainage area and the inlet of the lower drainage area allows the inlets of the drainage areas to connect to the external space outside the drainage section. Therefore, when heavy rain exceeds the drainage capacity of the drainage section, water can overflow into the external space from the area between the two drainage areas. This prevents the drainage section from becoming clogged with water.

[0029] (18) In the ladder described in (17) above, the step is positioned to be aligned with the drainage guide member when stored in the recess. With this configuration, the step can be prevented from tilting toward the opposite side of the opening of the recess by the drainage guide member. Furthermore, if the step is supported by the step support based on the step support of the step operating part contacting the lower surface of the step, with the above configuration, the step can be rotated in the unfolding direction by the downward movement of the step support.

[0030] (19) In the ladder described in any one of (3) to (18) above, the support column comprises a first recess and a second recess, which are configured as the recess, and the opening of the first recess faces in the opposite direction to the opening of the second recess.

[0031] This configuration allows for the provision of steps and drainage guide members in both the first and second recesses. This increases the number of steps on the ladder, making it easier for people to ascend and descend using the ladder. In addition, two drainage sections are provided within the support column. This ensures that if one drainage section becomes unusable, rainwater can be drained through the other.

[0032] (20) A building that solves the above problem is equipped with a ladder as described in any one of (1) to (19) above. With this configuration, the ladder can drain rainwater from the rooftop through the drainage section. This allows the ladder to function as a downpipe. In addition, the steps are stored in recesses in the support columns. This reduces the impact of the steps on the building's appearance. [Effects of the Invention]

[0033] According to the ladder of this disclosure, the steps are stored in recesses in the support columns. This reduces the impact of the steps on the building's appearance. [Brief explanation of the drawing]

[0034] [Figure 1] This is a perspective view of the building. [Figure 2] This is a perspective view of the ladder when the steps are retracted. [Figure 3] This is a front view of the ladder as seen from direction A in Figure 1. [Figure 4] Figure 3 is a cross-sectional view of the ladder. [Figure 5] Figure 4 is a cross-sectional perspective view of the ladder. [Figure 6] Figure 3 is a rear view of the ladder. [Figure 7] This is a perspective view of the lower end of the ladder. [Figure 8] This is a perspective view of the step operation section. [Figure 9] This is a cross-sectional view of the lower end of the ladder when the steps are retracted. [Figure 10] This is a cross-sectional view of a building along line 10-10 in Figure 1. [Figure 11] This is a perspective view of the ladder during step deployment. [Figure 12] Figure 11 is a perspective view of the lower end of the ladder. [Figure 13] Figure 12 is a cross-sectional perspective view of the ladder. [Figure 14] This is a front view of the ladder as seen from direction B in Figure 1. [Figure 15] Figure 14 is a cross-sectional view of the ladder. [Modes for carrying out the invention]

[0035] <Embodiment> Referring to Figures 1 to 15, the ladder 4 and building 1 of this embodiment will be described. Examples of building 1 include detached houses, apartment buildings, commercial facilities, and public facilities. The building 1 described in this embodiment is a detached house.

[0036] [Buildings] As shown in Figure 1, the building 1 comprises an exterior wall 2, a roof 3 with a rooftop, and a ladder 4. In this embodiment, the rooftop is flat. In this embodiment, the vertical direction DZ1 is the height direction of the exterior wall 2 of the building 1 in a front view. The depth direction DY1 is the direction perpendicular to the outer surface of the exterior wall 2 of the building 1 in a plan view. The horizontal direction DX1 is the direction that intersects the vertical direction DZ1 and is along the exterior wall 2. In this embodiment, the horizontal direction DX1 is perpendicular to the vertical direction DZ1 and is along the exterior wall 2.

[0037] As shown in Figure 1, the ladder 4 is installed on the outer wall 2 of the building 1. The ladder 4 runs along the outer wall 2 of the building 1 to the rooftop. In this embodiment, the ladder 4 is installed to run along the outer wall 2 of the building 1 from the ground to the rooftop.

[0038] [ladder] As shown in Figure 2, the ladder 4 comprises a ladder section 5 and a drainage section 6 provided on the ladder section 5. The ladder section 5 is the part on which one steps up and down. The drainage section 6 is the part that drains rainwater from the roof.

[0039] [Ladder section] As shown in Figures 2 to 5, the ladder section 5 has a support column section 11 and a plurality of steps 21.

[0040] [Strut section] As shown in Figures 2 and 3, the support column 11 comprises a support column body 15. The support column body 15 extends in the height direction of the outer wall 2. That is, the support column body 15 extends in the vertical direction DZ1 along the outer wall 2. The support column body 15 comprises a first plate portion 16, a second plate portion 17, and a connecting portion 18. The first plate portion 16 extends in the height direction of the outer wall 2. The second plate portion 17 extends in the height direction of the outer wall 2. The second plate portion 17 is arranged parallel to the first plate portion 16. The connecting portion 18 extends in the height direction of the outer wall 2. The connecting portion 18 connects the first plate portion 16 and the second plate portion 17. In this embodiment, the support column body 15 is made of H-shaped steel 61. That is, the H-shaped steel 61 is arranged to connect from the ground to the rooftop along the outer wall 2. The first plate portion 16 is the first flange portion 62 of the H-shaped steel 61. The second plate portion 17 is the second flange portion 63 of the H-shaped steel 61. The first flange portion 62 is closer to the outer wall 2 than the second flange portion 63. The connecting portion 18 is the web portion 64 of the H-shaped steel 61.

[0041] As shown in Figure 2, the support column 11 has a recess 12. The recess 12 is provided along the longitudinal direction of the support column body 15. The recess 12 comprises a first surface 16A, a second surface 17A, and a side surface 18A of the connecting portion 18. The first surface 16A is the inner surface of the first plate portion 16. The second surface 17A is the surface of the second plate portion 17 that faces the first surface 16A. The first surface 16A is the inner surface 62A of the first flange portion 62 of the H-shaped steel 61. The second surface 17A is the inner surface 63A of the second flange portion 63 of the H-shaped steel 61. The side surface 18A of the connecting portion 18 is the first side surface 64A and the second side surface 64B of the web portion 64.

[0042] The support column 11 includes a first recess 13 and a second recess 14, which are configured as recesses 12. In this embodiment, the first recess 13 is composed of the inner surface 62A of the first flange portion 62, the inner surface 63A of the second flange portion 63, and the first side surface 64A of the web portion 64. The second recess 14 is composed of the inner surface 62A of the first flange portion 62, the inner surface 63A of the second flange portion 63, and the second side surface 64B of the web portion 64.

[0043] As shown in Figure 2, the recess 12 is provided on the support column 11 such that the opening 12A of the recess 12 faces in the lateral direction DX1 which intersects the vertical direction DZ1. The opening 13A of the first recess 13 faces in the opposite direction to the opening 14A of the second recess 14. The first flange portion 62 comprises a first side end 62C and a second side end 62D. The first side end 62C is the side end of the first flange portion 62 on the first recess 13 side. The second side end 62D is the side end of the first flange portion 62 on the second recess 14 side. The second flange portion 63 comprises a third side end 63B and a fourth side end 63C. The third side end 63B is the side end of the second flange portion 63 on the first recess 13 side. The fourth side end 63C is the side end of the second flange portion 63 on the second recess 14 side. In this embodiment, the opening 13A of the first recess 13 is provided between the first side end 62C of the first flange portion 62 and the third side end 63B of the second flange portion 63. The opening 14A of the second recess 14 is provided between the second side end 62D of the first flange portion 62 and the fourth side end 63C of the second flange portion 63.

[0044] As shown in Figure 2, the recess 12 has a bottom surface 12B. In this embodiment, the bottom surface 12B is the first side surface 64A and the second side surface 64B of the web portion 64. The bottom surface 12B is on the opposite side of the opening 12A in the lateral direction DX1. In this embodiment, the first side surface 64A of the web portion 64 is on the opposite side of the opening 13A of the first recess 13. The second side surface 64B of the web portion 64 is on the opposite side of the opening 14A of the second recess 14.

[0045] [Steps] The step 21 provided on the support column 11 will be described with reference to Figures 2, 4, and 5.

[0046] As shown in Figures 2, 4, and 5, multiple steps 21 are provided on the support column 11. In this embodiment, the steps 21 are provided on the H-shaped steel 61. The steps 21 are provided in the recess 12. In this embodiment, multiple steps 21 are provided in the first recess 13 and the second recess 14, respectively, arranged vertically.

[0047] As shown in Figures 4 and 5, the step 21 comprises a step body 22 and a base 23. The step body 22 is made of a rod with a rectangular cross-section. One end of the step body 22, the first end 22A, is connected to the base 23. The other end of the step body 22, the second end 22B, is curved. The base 23 is cylindrical. The base 23 has a through portion 24 through which a shaft member 25 is inserted at its central axis. The base 23 is connected to the step body 22 at its side surface 23A. The side surface 23A of the base 23 is connected to the first end 22A of the step body 22 in the longitudinal direction. The longitudinal size of the base 23 is approximately the same as the size between the inner surface 62A of the first flange portion 62 and the inner surface 63A of the second flange portion 63. The size of the step body 22 in the short direction is approximately half the size of the base 23 in the long direction.

[0048] As shown in Figure 13, in the configuration when step 21 is unfolded from recess 12, the second end 22B of the step body 22 of step 21 is bent such that the end face of the second end 22B of the step body 22 of step 21 faces upward.

[0049] As shown in Figures 4 and 5, step 21 is rotatably mounted on the support column 11. Specifically, the shaft member 25 is mounted perpendicular to the inner surface 62A of the first flange portion 62 or the inner surface 63A of the second flange portion 63. The shaft member 25 is larger than the longitudinal size of the base portion 23. The shaft diameter of the shaft member 25 is smaller than the hole diameter of the insertion portion 24 of the base portion 23. The shaft member 25 is inserted through the insertion portion 24 of the base portion 23. In this embodiment, the shaft member 25 is mounted perpendicular to the inner surface 62A of the first flange portion 62.

[0050] As shown in Figures 2 and 5, the recess 12 is configured such that the step 21 is housed within the recess 12. In plan view, the step 21 is located inside the opening 12A of the recess 12. In this embodiment, when the step 21 is housed in the recess 12, the step 21 is located between the first side surface 64A or the second side surface 64B of the web portion 64 and the opening 12A of the recess 12.

[0051] [Drainage section] As shown in Figures 2, 4, and 5, the drainage section 6 is provided in the ladder section 5. The drainage section 6 is provided inside the support column section 11. The drainage section 6 is provided in the recess 12. In this embodiment, the drainage section 6 is provided in the recess 12 which is formed by the first flange section 62, the second flange section 63, and the web section 64 of the H-shaped steel 61.

[0052] As shown in Figures 4 and 5, the drainage section 6 includes a drainage guide member 41. The drainage guide member 41 is a member that guides rainwater that flows into the drainage section 6. In this embodiment, the drainage guide member 41 is a plate-shaped member. The drainage guide member 41 is positioned within the recess 12. The drainage guide member 41 is positioned such that its side surface is perpendicular to the first flange portion 62 and the second flange portion 63 of the H-shaped steel 61.

[0053] As shown in Figures 4 and 5, the drainage guide member 41 has an upper end 41A and a lower end 41B. The upper end 41A is the upper end of the drainage guide member 41 when it is positioned in the recess 12. The lower end 41B is the lower end of the drainage guide member 41 when it is positioned in the recess 12. In this embodiment, the drainage guide member 41 has a first portion 42 and a second portion 43. The size of the first portion 42 in the longitudinal direction of the drainage guide member 41 is larger than the size of the second portion 43. The first portion 42 is positioned above the second portion 43 when the drainage guide member 41 is positioned in the recess 12. The first portion 42 is positioned diagonally so as to intersect the web portion 64 of the H-beam 61. The second portion 43 extends downward from the first portion 42. The second portion 43 is positioned parallel to the web portion 64. The upper end 41A is the end 42A of the first portion 42. The lower end 41B is the end 43A of the second portion 43. The upper end 41A is located closer to the opening 12A of the recess 12 than the lower end 41B in the lateral direction DX1. That is, the end 42A of the first portion 42 is located closer to the opening 12A of the recess 12 than the end 43A of the second portion 43 in the lateral direction DX1.

[0054] As shown in Figure 4, multiple drainage guide members 41 are provided within the recess 12 of the support column 11 along the vertical direction DZ1.

[0055] As shown in Figure 4, the drainage guide member 41 is positioned between the bottom surface 12B and the step 21 within the recess 12. Specifically, the drainage guide member 41 is positioned between the bottom surface 12B and the step 21 when the step 21 is housed in the recess 12. In this embodiment, the drainage guide member 41 is positioned vertically in each of the first recess 13 and the second recess 14. In the first recess 13, the drainage guide member 41 is positioned between the first side surface 64A of the web portion 64 and the step 21 located in the first recess 13. In the second recess 14, the drainage guide member 41 is positioned between the second side surface 64B of the web portion 64 and the step 21 located in the second recess 14.

[0056] As shown in Figure 4, the drainage guide member 41 divides the space into a drainage area 44 and a step storage area 45. The drainage area 44 is the space on the bottom surface 12B side of the recess 12. In this embodiment, the drainage area 44 includes the space between the drainage guide member 41 and the first side surface 64A of the web 64 and the space between the drainage guide member 41 and the second side surface 64B of the web 64. The drainage area 6 includes the drainage area 44. The step storage area 45 is the space on the opening 12A side of the recess 12. In this embodiment, one of the step storage areas 45 has the space between the drainage guide member 41 and the opening 13A of the first recess 13. The other of the step storage areas 45 has the space between the drainage guide member 41 and the opening 14A of the second recess 14. The step 21 is located in the step storage area 45.

[0057] As shown in Figures 4 and 5, the step 21 is positioned to align with the drain guide member 41 when housed in the recess 12. In this embodiment, the step body 22 is positioned to align with the first portion 42 of the drain guide member 41.

[0058] [Step operation unit] The step operation unit 31 will be described with reference to Figures 2 and 4 to 8. The ladder 4 further includes a step operation unit 31 for operating the step 21.

[0059] As shown in Figures 3 to 8, the step operation unit 31 includes a step operation unit body 32, a step support unit 35, and an operation unit 36.

[0060] As shown in Figure 8, the step operating unit body 32 comprises two vertical members 33 and a plurality of horizontal members 34 connecting the two vertical members 33. The two vertical members 33 are arranged along the outer surface 62B of the first flange portion 62 (see Figure 6). The length of the two vertical members 33 is shorter than the vertical length DZ1 of the H-shaped steel 61. The horizontal members 34 are arranged to contact the inner surfaces 33A of the two vertical members 33. The length of the horizontal members 34 is shorter than the horizontal length DX1 of the H-shaped steel 61. The distance between the two vertical members 33 is shorter than the horizontal length DX1 of the H-shaped steel 61.

[0061] As shown in Figures 2, 5, and 6, the step operation unit body 32 is positioned relative to the support column 11. In this embodiment, the step operation unit body 32 is provided along the H-shaped steel 61. Specifically, the step operation unit body 32 is positioned along the outer surface 62B of the first flange portion 62 of the H-shaped steel 61. A support guide portion 71 is provided on the outer surface 62B of the first flange portion 62 of the H-shaped steel 61, along the vertical member 33 of the step operation unit body 32. The support guide portion 71 guides the step operation unit body 32 so that it can move parallel to the first flange portion 62. The support guide portion 71 also supports the step operation unit body 32 so that it does not move away from the first flange portion 62.

[0062] As shown in Figure 8, the step support portion 35 is provided on the step operating portion body 32. The vertical member 33 of the step operating portion body 32 has a front surface 33B and a rear surface 33C. The front surface 33B is the surface that faces the outer surface 62B of the first flange portion 62 of the H-shaped steel 61 when it is placed on the H-shaped steel 61. The rear surface 33C is the surface opposite to the front surface 33B. Multiple step support portions 35 are provided at intervals along the longitudinal direction of the two vertical members 33. The step support portions 35 are provided at the same positions as the horizontal members 34 which are arranged at intervals along the longitudinal direction of the two vertical members 33. The step support portions 35 extend perpendicularly from the front surface 33B of the vertical member 33 of the step operating portion body 32.

[0063] As shown in Figures 4 and 5, the H-shaped steel beam 61 has two through grooves 65 in the first flange portion 62. One of the two through grooves 65 is provided in the first flange portion 62 on one side separated by the web portion 64, along the vertical direction DZ1. The other of the two through grooves 65 is provided in the first flange portion 62 on the other side separated by the web portion 64, along the vertical direction DZ1. In addition, on each side of the first flange portion 62 separated by the web portion 64, multiple through grooves 65 are provided at intervals in the vertical direction DZ1 of the H-shaped steel beam 61. The width of the through groove 65 in the lateral direction DX1 is greater than the thickness of the step support portion 35 in the lateral direction DX1. The distance between two through grooves 65 in the lateral direction DX1 is the same as the distance between two step support portions 35 in the lateral direction DX1. The step support portion 35 is positioned to be inserted into the insertion groove 65. The front surface 33B of the vertical member 33 of the step operating portion body 32 contacts the outer surface 62B of the first flange portion 62 of the H-shaped steel 61.

[0064] As shown in Figures 13 and 15, the step support portion 35 contacts the lower surface 22C of the step body 22 of the step 21. The lower surface 22C of the step body 22 is the surface that faces downward in the vertical direction DZ1 when the step 21 is unfolded along the lateral direction DX1.

[0065] As shown in Figures 2, 7, and 8, the operating section 36 is provided on the step operating section body 32. In this embodiment, it is provided on the end 33D of the vertical member 33 of the step operating section body 32. The operating section 36 comprises two protruding members 37 and a horizontal member 38 connecting the two protruding members 37. The protruding members 37 protrude perpendicularly in the depth direction DY1 from the front surface 33B of the vertical member 33 of the step operating section body 32. The protruding members 37 protrude from the end 33D of the vertical member 33 of the step operating section body 32. The distance between the two protruding members 37 is the same as the distance between the two vertical members 33 of the step operating section body 32. The longitudinal size of the two protruding members 37 is greater than the depth direction DY1 of the H-shaped steel 61. The end 37A of the protruding members 37 is arranged so as not to overlap with the H-shaped steel 61 in a plan view and to protrude from the second flange portion 63. The horizontal member 38 is positioned such that, when the operating section 36 is placed on the H-shaped steel 61, it does not overlap with the H-shaped steel 61 in a plan view and protrudes from the second flange portion 63.

[0066] As shown in Figures 2, 4, 5, and 7, the ladder 4 further comprises step support reinforcements 39 that support the step 21 when the step 21 is extended. The step support reinforcements 39 are columnar members. Multiple step support reinforcements 39 are provided along the vertical direction DZ1 of the H-beam 61. The step support reinforcements 39 are provided in a one-to-one correspondence with the step 21. The longitudinal size of the step support reinforcements 39 is the same as the distance between the outer surface 62B of the first flange portion 62 and the inner surface 63A of the second flange portion 63 of the H-beam 61.

[0067] As shown in Figure 5, the first flange portion 62 of the H-shaped steel 61 has an insertion recess 66 that extends from the outer surface 62B of the first flange portion 62 to the inner surface 62A of the first flange portion 62. The insertion recess 66 extends in the depth direction DY1 at the first side end 62C and the second side end 62D of the first flange portion 62. The insertion recess 66 is provided near the lower end 65B of the insertion groove 65.

[0068] As shown in Figures 5 and 7, the step support reinforcement 39 comprises a first end 39A and a second end 39B. The first end 39A engages with the first flange portion 62 of the H-shaped steel 61. The second end 39B engages with the second flange portion 63 of the H-shaped steel 61. The step support reinforcement 39 is positioned such that the first end 39A fits into the insertion recess 66. The end face of the second end 39B is fixed to the inner surface 63A of the second flange portion 63.

[0069] As shown in Figures 2, 7, and 9, the ladder 4 further comprises a fixing jig 51. The fixing jig 51 is positioned at the lower end 61A of the H-shaped steel 61.

[0070] As shown in Figure 9, the fixing jig 51 comprises a fixing jig body 52, a first engaging portion 53, and a second engaging portion 54. The vertical dimension DZ1 of the fixing jig 51 is greater than the distance between the step support reinforcement portion 39 located at the lowest end of the H-beam 61 and the lower end 61A of the H-beam 61. The depth dimension DY1 of the fixing jig body 52 is less than the distance between the first flange portion 62 and the second flange portion 63 of the H-beam 61. The fixing jig body 52 has a first surface 52A and a second surface 52B. The first surface 52A is the surface that faces the web portion 64 of the H-beam 61 when the fixing jig 51 is placed on the H-beam 61. The second surface 52B is the surface opposite to the first surface 52A. The body of the fixing jig 51 is provided with a gripping portion 55 on the second surface 52B that grips the fixing jig 51.

[0071] As shown in Figure 9, the fixing jig body 52 has a first end 52C and a second end 52D. The first end 52C is the end that is located on the upper side when the fixing jig 51 is placed on the H-shaped steel 61. The second end 52D is the end opposite to the first end 52C. The first engaging portion 53 extends perpendicularly from the first surface 52A of the fixing jig body 52. ​​The first engaging portion 53 extends from the first end 52C of the fixing jig body 52. ​​The second engaging portion 54 extends from the first surface 52A of the fixing jig body 52. ​​The second engaging portion 54 extends from the second end 52D of the fixing jig body 52. ​​The first engaging portion 53 contacts the upper surface of the step support reinforcement portion 39. The second engaging portion 54 contacts the lower surface of the protruding member 37 of the operating portion 36. The fixing jig 51 is positioned so as to sandwich the protruding members 37 of the step support reinforcement 39 and the operating section 36 between the first engaging portion 53 and the second engaging portion 54. Hereinafter, the position of the fixing jig 51 when it is sandwiching the protruding members 37 of the step support reinforcement 39 and the operating section 36 will be referred to as the engaged state of the fixing jig 51. The position of the fixing jig 51 when it is detached from the protruding members 37 of the step support reinforcement 39 and the operating section 36 will be referred to as the unengaged state of the fixing jig 51. The state of the step operating section 31 when the protruding members 37 of the step support reinforcement 39 and the operating section 36 are sandwiched by the fixing jig 51 will be referred to as the fixed state of the step operating section 31. The state of the step operating section 31 when the protruding members 37 of the step support reinforcement 39 and the operating section 36 are released from the engagement of the fixing jig 51 will be referred to as the released state of the step operating section 31. When the fixing jig 51 is engaged, the step support portion 35 of the step operating portion 31 is located at the upper end 65A of the insertion groove 65. At this time, the step 21 is supported by the step support portion 35 in an inclined state along the drainage guide member 41 and is therefore housed in the recess 12. When the fixing jig 51 is not engaged, the step support portion 35 of the step operating portion 31 is located at the lower end 65B of the insertion groove 65. At this time, the step support portion 35 is located below the upper surface of the step support reinforcement portion 39. Therefore, when the fixing jig 51 is not engaged, the step 21 rotates by its own weight so that the second end portion 22B comes out of the recess 12.Then, the step 21 is supported by the step support reinforcement part 39 when the step body 22 is in a horizontal position. In other words, when the step operating part 31 is in the open position, the step 21 is deployed.

[0072] [Structure for fixing ladders to the exterior wall] The fixing structure of the ladder 4 to the outer wall 2 will be described with reference to Figures 6 and 10.

[0073] As shown in Figures 6 and 10, the ladder 4 is fixed to the exterior wall 2 by fixing members 72. Multiple fixing members 72 are provided along the vertical direction DZ1 of the H-shaped steel 61. The fixing members 72 connect the outer surface 62B of the first flange portion 62 of the H-shaped steel 61 to the exterior wall 2.

[0074] As shown in Figure 10, the H-shaped steel beam 61 and the rainwater collector 73 installed on the rooftop are connected by a drain pipe 74. In this embodiment, the drain pipe 74 is a round pipe type. The first flange portion 62 of the H-shaped steel beam 61 has an insertion hole 67 (see Figure 6). The diameter of the insertion hole 67 is the same as the diameter of the drain pipe 74.

[0075] <Ladder steps when stored> The configuration of the ladder 4 when it is stored in step 21 in this embodiment will be described.

[0076] As shown in Figures 2 and 7, the fixing jig 51 fixes the step operating section 31 so that the step support section 35 is maintained in a first position. Specifically, the fixing jig 51 fixes the step operating section 31 so that the step support section 35 is maintained in a first position by the engagement state described above. The first position is the position of the step support section 35. Specifically, the first position is the position of the step support section 35 when the step support section 35 is located at the upper end 65A of the insertion groove 65. When the step support section 35 is in the first position, the step 21 is positioned in a storage position where the step 21 is housed in the recess 12. Specifically, when the step support section 35 is located at the upper end 65A of the insertion groove 65, the step 21 is located between the first side surface 64A or the second side surface 64B of the web section 64 and the opening 12A of the recess 12. As a result, the step 21 is housed in the recess 12 of the H-shaped steel 61.

[0077] As shown in Figures 4 and 5, the step support 35 supports the step 21. When the step 21 is housed in the recess 12, it is supported by the step support 35 so as to be tilted upward toward the opening 12A. Specifically, the step body 22 is supported by the step support 35 so as to be tilted toward the opening 12A of the recess 12.

[0078] <Ladder steps in their extended state> The configuration of the ladder 4 during step 21 deployment in this embodiment will be described.

[0079] As shown in Figures 11 and 12, the fixing jig 51 is removed. This allows the operating part 36 of the step operating part 31 to be operated. The operating part 36 operates the step operating part body 32. The step support part 35 moves as a result of the operation of the operating part 36. Specifically, the operating part 36 can be used to move the step operating part body 32 up and down. The step support part 35 moves up and down as a result of the operating part 36. Specifically, the step support part 35 moves up and down in the insertion groove 65 as a result of the operating part 36.

[0080] As shown in Figures 2 to 6 and Figures 11 to 15, the step operation unit 31 stores the step 21 in the recess 12 or unfolds it out of the recess 12. The step 21 is stored in the recess 12 or unfolded out of the recess 12 by the movement of the step support unit 35. The step 21 is stored in the recess 12 by the upward movement of the step support unit 35. The step 21 is unfolded out of the recess 12 by the downward movement of the step support unit 35. In this embodiment, by moving the operation unit 36 ​​of the step operation unit 31 up and down, the step support unit 35 moves up and down in the insertion groove 65. The step support unit 35 moves along the lower surface 22C of the step body 22 and moves up and down in the insertion groove 65. As a result, by operating the operation unit 36 ​​of the step operation unit 31, the step 21 can be stored in the recess 12 or unfolded out of the recess 12.

[0081] As shown in Figures 14 and 15, step 21 is provided such that when step 21 is deployed, the step body 22 of step 21 is aligned with the lateral direction DX1.

[0082] As shown in Figures 11 to 13 and Figure 15, the step support reinforcement 39 supports the step 21 so that the step 21 is maintained in the deployed position. Specifically, when the step 21 is in the deployed position, the step support 35 is in a second position. The second position is a position of the step support 35 that is below the position of the upper surface of the step support reinforcement 39 and does not come into contact with the step 21. In this way, by the step support 35 descending to the second position, the step 21 is supported by the step support reinforcement 39.

[0083] When the step support portion 35 is in the second position, the step 21 is positioned in the deployed position where it unfolds from the recess 12. Specifically, when the step support portion 35 is located at the lower end portion 65B of the insertion groove 65, the step body 22 unfolds out of the recess 12. As a result, the deployed state of the step 21 is maintained by the step support reinforcement portion 39.

[0084] [Operation of this embodiment] The operation of this embodiment will now be explained. A ladder 4, installed along the outer wall 2 of building 1 to lead to the rooftop, comprises a ladder section 5 and a drainage section 6 provided on the ladder section 5. The ladder section 5 has a support column 11 and a plurality of steps 21 provided on the support column 11. The support column 11 has a recess 12. The recess 12 is configured so that the steps 21 are housed within the recess 12.

[0085] With this configuration, the ladder 4 can drain rainwater from the rooftop via the drainage section 6. This structure allows the ladder 4 to function as a downpipe. Furthermore, the step 21 is housed within the recess 12 of the support column 11. This reduces the impact of the step 21 on the exterior appearance of the building 1.

[0086] [Effects of this embodiment] The effects of this embodiment will now be explained.

[0087] (1) A ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop comprises a ladder section 5 and a drainage section 6 provided on the ladder section 5. The ladder section 5 has a support column 11 and a plurality of steps 21 provided on the support column 11. The support column 11 has a recess 12. The recess 12 is configured such that the steps 21 are housed within the recess 12.

[0088] With this configuration, the ladder 4 can drain rainwater from the rooftop via the drainage section 6. This allows the ladder 4 to function as a downpipe. In addition, the step 21 is housed within the recess 12 of the support column 11. This reduces the impact of the step 21 on the exterior appearance of the building 1.

[0089] (2) In a ladder 4 that is installed along the outer wall 2 of building 1 to lead to the rooftop, the drainage section 6 is installed inside the support column 11. With this configuration, rainwater can be drained by the support column 11 of the ladder section 5.

[0090] (3) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the support column 11 comprises a support column body 15 extending in the height direction of the outer wall 2. The recess 12 is provided along the longitudinal direction of the support column body 15, and the opening 12A of the recess 12 is provided in a direction that intersects the vertical direction DZ1 and faces the horizontal direction DX1 along the outer wall 2. The step 21 is provided in the recess 12 such that when the step 21 is extended, the step 21 is aligned with the horizontal direction DX1.

[0091] In this configuration, step 21 unfolds along the lateral direction DX1. This makes it easier to climb ladder 4.

[0092] (4) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the drainage section 6 is provided within the recess 12. With this configuration, the drainage section 6 is provided integrally with the recess 12. This reduces the effort required to install the drainage section 6 compared to the case where the drainage section 6 is provided outside the recess 12.

[0093] (5) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the main body of the support column 15 comprises a first plate portion 16, a second plate portion 17, and a connecting portion 18. The first plate portion 16 extends in the height direction of the outer wall 2. The second plate portion 17 extends in the height direction of the outer wall 2 and is arranged parallel to the first plate portion 16. The connecting portion 18 extends in the height direction of the outer wall 2 and connects the first plate portion 16 and the second plate portion 17. The recess 12 comprises the inner first surface 16A of the first plate portion 16, the second surface 17A of the second plate portion 17 facing the first surface 16A, and the side surface 18A of the connecting portion 18.

[0094] With this configuration, a recess 12 can be provided in the support column 11 by the first plate portion 16, the second plate portion 17, and the connecting portion 18. This makes it easy to provide a recess 12 in the support column 11.

[0095] (6) In a ladder 4 provided along the outer wall 2 of building 1 to lead to the rooftop, when the step 21 is stored in the recess 12, it is located inside the opening 12A of the recess 12 in a plan view. With this configuration, the step 21 is not visible in a front view. This reduces the impact of the step 21 on the appearance of building 1.

[0096] (7) In a ladder 4 provided along the outer wall 2 of building 1 to lead to the rooftop, the step 21 is rotatably attached to the support column 11. With this configuration, the step 21 can be stored in or unfolded outside the recess 12.

[0097] (8) A ladder 4 provided along the outer wall 2 of the building 1 to lead to the rooftop is further provided with a step operating unit 31 for operating the steps 21. The step operating unit 31 stores the steps 21 in the recess 12 or extends them out of the recess 12.

[0098] With this configuration, the step 21 can be retracted or extended by operating the step operation unit 31.

[0099] (9) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the step operating section 31 includes a step operating section body 32, a step support section 35, and an operating section 36. The step support section 35 is provided on the step operating section body 32 to support the step 21. The operating section 36 is provided on the step operating section body 32 to operate the step operating section body 32. The step support section 35 moves when the operating section 36 is operated. The step 21 is stored in or deployed outside the recess 12 as the step support section 35 moves.

[0100] With this configuration, the step 21 can be stored in or extended into the support column 11 by moving the step support portion 35 of the step operation portion 31 with the operation portion 36.

[0101] (10) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the step operating unit body 32 is positioned relative to the support column 11 such that the step support portion 35 contacts the lower surface 22C of the step 21. The step support portion 35 moves up and down by the operating unit 36. The step 21 is stored in the recess 12 when the step support portion 35 moves upward, and is extended out of the recess 12 when the step support portion 35 moves downward.

[0102] In this configuration, step 21 is stored in or deployed outside the recess 12 of the support column 11 by the vertical movement of the step support portion 35.

[0103] (11) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the step 21 is supported by the step support 35 so as to tilt upward toward the opening 12A when it is stored in the recess 12. With this configuration, the step 21 is deployed by its own weight when the step support 35 moves downward.

[0104] (12) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, a fixing jig 51 is further provided to fix the step operating section 31 so that the step support section 35 is maintained in a first position. The first position is the position of the step support section 35 such that the step 21 is placed in a storage position where the step 21 is stored in the recess 12. With this configuration, the stored state of the step 21 is maintained by the fixing jig 51.

[0105] (13) A ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop is further provided with a step support reinforcement 39 that supports the step 21 so that the step 21 is maintained in the deployed position. With this configuration, the deployed state of the step 21 is maintained by the step support reinforcement 39.

[0106] (14) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, when the step 21 is extended from the recess 12, the end face of the second end 22B of the step 21 is curved upward. This configuration reduces the likelihood of a person's feet protruding from the step 21 when climbing the ladder 4.

[0107] (15) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the recess 12 has a bottom surface 12B on the opposite side of the opening 12A in the lateral direction DX1. The drainage section 6 includes a drainage guide member 41 positioned between the bottom surface 12B and the step 21 within the recess 12. The drainage guide member 41 divides the space within the recess 12 into a drainage space 44 on the bottom surface 12B side and a step storage section 45 on the opening 12A side. With this configuration, the drainage section 6 can drain rainwater that flows into the drainage section 6 using the drainage guide member 41. As a result, rainwater that flows into the drainage section 6 can be drained more smoothly than when the drainage guide member 41 is not provided.

[0108] (16) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, a plurality of drainage guide members 41 are provided within the recess 12 of the support column 11 along the vertical direction DZ1. With this configuration, a plurality of drainage guide members 41 are provided within the recess 12 along the vertical direction DZ1 of the support column 11. As a result, a plurality of gaps are provided in the drainage section 6. This allows air to enter and exit the drainage section 6.

[0109] (17) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the drainage guide member 41 has an upper end 41A and a lower end 41B. The upper end 41A is located closer to the opening 12A of the recess 12 than the lower end 41B in the lateral direction DX1.

[0110] In this configuration, the drainage area enclosed by the recess 12 and the drainage guide member 41 narrows from the upper end 41A to the lower end 41B of the drainage guide member 41. Therefore, in the drainage area, the inlet for rainwater is larger than the outlet for rainwater. In addition, since multiple drainage guide members 41 are provided along the vertical direction DZ1, multiple drainage areas are connected vertically. Of the two drainage areas arranged vertically, the outlet of the upper drainage area is smaller than the inlet of the lower drainage area, so water flows smoothly from the upper drainage area to the lower drainage area. Furthermore, because there is a difference in size between the outlet of the upper drainage area and the inlet of the lower drainage area, the inlets of the drainage areas are connected to the external space outside the drainage section 6. Therefore, when heavy rain exceeds the drainage capacity of the drainage section 6, water can overflow into the external space from the area between the two drainage areas. This prevents the drainage section 6 from becoming clogged with water.

[0111] (18) In a ladder 4 provided along the outer wall 2 of a building 1 to lead to the rooftop, the step 21 is positioned to align with the drainage guide member 41 when stored in the recess 12. With this configuration, the step 21 can be prevented from tilting toward the opposite side of the opening 12A of the recess 12 by the drainage guide member 41. Furthermore, the step 21 is supported by the step support 35, based on the step support 35 of the step operating part 31 contacting the lower surface 22C of the step 21. With the above configuration, the step 21 can be rotated in the unfolding direction by the downward movement of the step support 35.

[0112] (19) In a ladder 4 provided along the outer wall 2 of a building 1 so as to lead to the rooftop, the support column 11 comprises a first recess 13 and a second recess 14, which are configured as recesses 12. The opening 13A of the first recess 13 faces in the opposite direction to the opening 14A of the second recess 14.

[0113] With this configuration, steps 21 and drainage guide members 41 can be provided in the first recess 13 and the second recess 14, respectively. As a result, the number of steps 21 on the ladder 4 increases, making it easier for people to ascend and descend using the ladder 4. In addition, two drainage sections 6 are provided within the support column 11. This allows rainwater to be drained through the other drainage section 6 if one drainage section 6 becomes unusable.

[0114] (20) The building 1 is equipped with the ladder 4 described above. With this configuration, the ladder 4 can drain rainwater from the rooftop via the drainage section 6. This allows the ladder 4 to function as a downpipe. In addition, the step 21 is housed in the recess 12 of the support column 11. This reduces the impact of the step 21 on the appearance of the building 1.

[0115] <Variation> The above embodiments are illustrative of possible forms of the ladder 4 and building 1, and are not intended to limit their forms. The ladder 4 and building 1 may take forms different from those illustrated in the above embodiments. Examples include forms in which some of the configurations of the embodiments are replaced, modified, or omitted, or forms in which new configurations are added to the embodiments. Modifications of the embodiments are shown below.

[0116] In this embodiment, Figure 13 shows that the size of step 21 in the short direction is smaller than the width of the drain guide member 41 in the short direction. In contrast, the size of step 21 in the short direction may be approximately the same as the size of the drain guide member 41 in the short direction.

[0117] The drainage guide member 41 may be made of resin.

[0118] This specification discloses the following technologies: [Note 1] Note 1 is a ladder installed along the exterior wall of a building to lead to the rooftop. The ladder comprises a ladder section and a drainage section provided on the ladder section. The ladder section has a support column and a plurality of steps provided on the support column. The support column has a recess. The recess is configured such that the steps are housed within the recess.

[0119] [Note 2] In the ladder described in Appendix 1, the drainage section is provided inside the support column.

[0120] [Note 3] In the ladder described in Appendix 2, the support column comprises a support column body extending in the height direction of the outer wall. The recess is provided along the longitudinal direction of the support column body, and the opening of the recess is positioned so as to intersect the vertical direction and face the horizontal direction along the outer wall. The step is provided in the recess such that when the step is extended, the step body of the step is aligned with the horizontal direction.

[0121] [Note 4] In the ladder described in Appendix 3, the drainage section is provided within the recess.

[0122] [Note 5] In the ladder described in Appendix 4, the main body of the support column comprises a first plate portion, a second plate portion, and a connecting portion. The first plate portion extends in the height direction of the outer wall. The second plate portion extends in the height direction of the outer wall and is arranged parallel to the first plate portion. The connecting portion extends in the height direction of the outer wall and connects the first plate portion and the second plate portion. The recess comprises a first inner surface of the first plate portion, a second surface of the second plate portion facing the first surface, and a side surface of the connecting portion.

[0123] [Note 6] In the ladder described in Appendix 3, when the step is stored in the recess, it is located inward from the opening of the recess in a plan view.

[0124] [Note 7] In the ladder described in Appendix 6, the steps are rotatably attached to the support columns.

[0125] [Note 8] The ladder described in Appendix 3 further comprises a step operating unit for operating the steps. The step operating unit stores the steps in the recess or extends them out of the recess.

[0126] [Note 9] In the ladder described in Appendix 8, the step operating section comprises a step operating section body, a step support section, and an operating section. The step support section is provided on the step operating section body to support the step. The operating section is provided on the step operating section body to operate the step operating section body. The step support section moves when the operating section is operated. The step is stored in the recess or deployed outside the recess as the step support section moves.

[0127] [Note 10] In the ladder described in Appendix 9, the step operating unit body is positioned relative to the support column such that the step support portion contacts the lower surface of the step. The step support portion moves up and down by the operating unit. The step is stored in the recess when the step support portion moves upward, and is extended out of the recess when the step support portion moves downward.

[0128] [Note 11] In the ladder described in Appendix 10, when the step is stored in the recess, it is supported by the step support so as to be inclined upward toward the opening.

[0129] [Note 12] The ladder described in Appendix 11 further includes a fixing jig for fixing the step operating section so that the step support section is maintained in a first position. The first position is the position of the step support section that positions the step in a storage position where the step is housed in the recess.

[0130] [Note 13] The ladder described in Appendix 12 further includes a step support reinforcement that supports the step so that the step is maintained in the extended position.

[0131] [Note 14] In the ladder described in Appendix 7, when the steps are deployed from the recesses, the ends of the steps are bent such that the end faces of the ends of the steps face upward.

[0132] [Note 15] In the ladder described in Appendix 3, the recess has a bottom surface on the side opposite to the opening in the lateral direction. The drainage section includes a drainage guide member positioned between the bottom surface and the step within the recess. The drainage guide member divides the space within the recess into a drainage space on the bottom surface side and a step storage section on the opening side.

[0133] [Note 16] In the ladder described in Appendix 15, the drainage guide members are provided in multiple locations along the vertical direction within the recess of the support column.

[0134] [Note 17] In the ladder described in Appendix 16, the drainage guide member has an upper end and a lower end. The upper end is located closer to the opening of the recess in the lateral direction than the lower end.

[0135] [Note 18] In the ladder described in Appendix 17, the steps are arranged to be aligned with the drainage guide member when stored in the recess.

[0136] [Note 19] In the ladder described in Appendix 3, the support column comprises a first recess and a second recess, which are configured as the recesses. The opening of the first recess faces in the opposite direction to the opening of the second recess.

[0137] [Note 20] Appendix 20 concerns building technology. The building described in Appendix 20 is equipped with a ladder as described in any one of Appendix 1 to 19. [Explanation of Symbols]

[0138] DX1...horizontal direction, DZ1...vertical direction, 1...building, 2...exterior wall, 4...ladder, 5...ladder section, 6...drainage section, 11...support column section, 12...recess, 12A...opening, 12B...bottom surface, 13...first recess, 13A...opening, 14...second recess, 14A...opening, 15...support column body, 16...first plate section, 16A...first surface, 17...second plate section, 17A...second surface, 18...connection Connection part, 18A...side, 21...step, 22...step body, 22B...second end, 22C...bottom, 31...step operating part, 32...step operating part body, 35...step support part, 36...operating part, 39...step support reinforcement part, 41...drainage guide member, 41A...upper end, 41B...lower end, 44...drainage space part, 45...step storage part, 51...fixing jig.

Claims

1. A ladder installed along the exterior wall of a building to lead to the rooftop, It comprises a ladder section and a drainage section provided on the ladder section, The ladder section comprises a support column and a plurality of steps provided on the support column. The aforementioned support column has a recess, The recess is configured such that the step is housed within the recess. ladder.

2. The drainage section is provided inside the support column, The ladder according to claim 1.

3. The aforementioned support column comprises a support column body that extends in the height direction of the outer wall, The recess is provided so as to be along the longitudinal direction of the main body of the support column, and the opening of the recess is provided so as to be in a direction that intersects the vertical direction and is oriented horizontally along the outer wall. The step is provided in the recess such that when the step is deployed, the step body of the step is aligned with the lateral direction. The ladder according to claim 2.

4. The drainage section is provided in the recess, The ladder according to claim 3.

5. The main body of the support column comprises a first plate portion extending in the height direction of the outer wall, a second plate portion extending in the height direction of the outer wall and arranged parallel to the first plate portion, and a connecting portion extending in the height direction of the outer wall and connecting the first plate portion and the second plate portion. The recess comprises a first inner surface of the first plate portion, a second surface of the second plate portion facing the first surface, and a side surface of the connecting portion. The ladder according to claim 4.

6. When the step is housed in the recess, in a plan view, it is located inside the opening of the recess. The ladder according to claim 3.

7. The step is rotatably attached to the support column, The ladder according to claim 6.

8. The system further includes a step operation unit for operating the aforementioned step, The step operation unit stores the step in the recess or deploys it outside the recess. The ladder according to claim 3.

9. The step operation unit comprises a step operation unit body, a step support unit provided on the step operation unit body to support the step, and an operation unit provided on the step operation unit body to operate the step operation unit body. The step support unit moves by operating the operating unit. The step is stored in or deployed outside the recess by the movement of the step support portion. The ladder according to claim 8.

10. The step operating unit body is positioned such that the step support portion contacts the lower surface of the step with respect to the support column portion. The step support unit moves up and down by the operating unit, The step is housed in the recess when the step support moves upward, and unfolded outside the recess when the step support moves downward. The ladder according to claim 9.

11. When the step is housed in the recess, it is supported by the step support so as to be inclined upward toward the opening. The ladder according to claim 10.

12. The device further includes a fixing jig for fixing the step operating section so that the step support section is maintained in the first position. The first position is the position of the step support portion that positions the step in a storage position where the step is housed in the recess. The ladder according to claim 11.

13. The step further comprises a step support reinforcement that supports the step so that the step is maintained in the deployed position. The ladder according to claim 12.

14. In the arrangement of the step when it is unfolded from the recess, the end of the step is curved such that the end face of the end of the step faces upward. The ladder according to claim 7.

15. The recess has a bottom surface portion on the side opposite to the opening in the lateral direction, The drainage section includes a drainage guide member positioned between the bottom surface and the step within the recess, The drainage guide member divides the space within the recess into a drainage space on the bottom side and a step storage section on the opening side. The ladder according to claim 3.

16. Multiple drainage guide members are provided within the recess of the support column, along the vertical direction. The ladder according to claim 15.

17. The drainage guide member has an upper end and a lower end, The upper end is located in a position closer to the opening of the recess than the lower end in the lateral direction. The ladder according to claim 16.

18. The step is positioned so as to be along the drain guide member when it is housed in the recess. The ladder according to claim 17.

19. The support column portion comprises a first recess and a second recess, which are configured as the recesses. The opening of the first recess faces in the opposite direction to the opening of the second recess. The ladder according to claim 3.

20. A building comprising a ladder as described in any one of claims 1 to 19.

Images