Support Structure of Elevator and Reformation Method

Abstract

To provide an elevator support structure capable of reducing installation costs without burdening a horizontal load of an elevator on a roof truss, and a remodeling method for adding an elevator equipped with the elevator support structure to a building.SOLUTION: An elevator support structure 1 has a hoistway 4 on the top floor, and a rectangular support frame 7 is erected on three sides of the hoistway except for the opening. The support frame 7 is fixed and erected on a lower beam 13 of the structural frame arranged in the floor space of the top floor. An upper beam 14 that is arranged to surround the elevator shaft and supports the load of the elevator is fixed on top of the support frame 7. A part of the support frame 7 is a load-bearing wall frame 8 having a brace 15 that bears the horizontal load of the elevator. The upper beam 14 is provided independently from the structural frame of the building and does not transmit the load of the elevator to a roof truss 2 provided above the elevator.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an elevator support structure for supporting a horizontal load on the top floor of an elevator provided in a building, and a reform method for constructing an elevator having the elevator support structure in a building.

Background Art

[0002] Conventionally, as an elevator provided as a renovation work in an existing building, as an installation method that does not affect the existing structure, a hoistway is formed by penetrating the upper and lower floors inside the building, and an elevator tower completely independent of the structural body that bears the horizontal bearing capacity such as the self-weight and seismic force of the elevator is constructed inside this hoistway. There is a completely self-supporting type elevator (see Patent Document 1). In order to install such an elevator, a large-scale construction for constructing an elevator tower is required, and there are problems such as a long construction period and an increase in cost.

[0003] Therefore, a steel guide rail for guiding the car up and down is provided in the hoistway, the vertical load of the elevator is borne by an elevator pit made of reinforced concrete via the guide rail, and the horizontal load due to an earthquake or the like of the elevator is borne by the structural body of the building by connecting the structural body of the building and the guide rail with a connecting metal, thereby eliminating the need for large-scale tower construction and shortening the construction period and reducing the cost. A semi-self-supporting type elevator has been proposed (see Patent Documents 2 and 3).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, depending on the building, when the elevator shaft does not have a beam installed above it, such as in the case of a truss structure without beams in the joist construction, the upper end of the elevator cannot be sufficiently supported, and there are cases where the structural frame cannot bear the horizontal load at the upper end of the elevator. In such cases, it is necessary to reinforce against the horizontal load by replacing it with a reinforcing beam of H-shaped steel integrated with the structural frame as a joist structure or by installing it.

[0006] However, the above-described reinforcement is large-scale and causes an increase in cost, and there are also cases where the truss structure and the reinforcing beam interfere with each other. For example, when adding an elevator, it may be necessary to remove the truss structure and form a joist construction of a Japanese-style house structure with a horizontal beam.

[0007] Therefore, an object of the present invention is to provide an elevator support structure that can reduce the installation cost without burdening the existing joist construction with the horizontal load of the elevator, and a renovation method for adding an elevator equipped with the elevator support structure to a building.

Means for Solving the Problems

[0008] The support structure of the first elevator of the present invention is a support structure of an elevator provided in a building, comprising an elevator shaft in a rectangular shape in plan view formed by penetrating through two or more floors including at least the top floor. Among the elevator shafts of the top floor, support frames in a rectangular frame shape are erected on three sides excluding the opening surface where the elevator door is formed. The support frames are fixed and erected on the lower beam members arranged in the floor recess of the top floor. The lower beam members are supported by the structural frame of the building. An upper beam member arranged to surround the elevator shaft and support the load of the elevator is fixed on the support frames. At least a part of the support frames is a shear wall frame having braces that bear the horizontal shear resistance of the elevator. The upper beam member is provided independently of the structural frame of the building and has a structure that does not transmit the load of the elevator to the cabin assembly provided above the elevator.

[0009] In addition to the features of the support structure of the first elevator of the present invention, the support structure of the second elevator of the present invention is characterized in that the shear wall frames are respectively arranged on three sides excluding the opening surface.

[0010] In addition to the features of the support structure of the first or second elevator of the present invention, the support structure of the third elevator of the present invention is characterized in that the cabin assembly is a truss structure.

[0011] In addition to the features of the support structure of any one of the first to third elevators of the present invention, among the upper beam members of the support structure of the fourth elevator of the present invention, the opening surface the upper beam member arranged on the upper side has an extension portion extending from the outer periphery of the elevator shaft, and the extension portion is supported by a retaining shear wall frame having a brace fixed and erected on the lower beam member.

[0012] The fifth elevator support structure of the present invention, in addition to the features of the elevator support structure of any one of the first to fourth, the elevator is installed such that at least one surface of the hoistway faces the outer periphery of the building, and the outer peripheral beam installed on the outer periphery below the top floor of the building has the lower end of the outer peripheral framework that supports the outer wall fixed at a position on the outdoor side of the upper surface, and the support frame is fixed at a position on the indoor side of the upper surface and constitutes a part of the lower beam member. The outer peripheral framework is formed at a height above the upper surface of the upper beam member fixed on the support frame and supports the truss structure.

[0013] The sixth elevator support structure of the present invention, in addition to the features of the elevator support structure of any one of the first to fifth, the elevator is installed at a position where the hoistway does not face the outer periphery of the building, and the upper surface of the upper beam member is lower than the lower surface of the truss structure.

[0014] The reform method of the present invention is a reform method for adding the elevator support structure described in any one of the first to sixth to an existing building. The method includes the steps of erecting the support frame including the shear wall frame on the lower beam member to form a base for three sides excluding the the opening surface hoistway, fixing the upper beam member on the support frame, and fixing the upper end of the load support member that supports the elevator car on the upper beam member.

Effect of the Invention

[0015] The support structure of the first elevator of the present invention is such that a rectangular frame-shaped support frame forming the hoistway on the top floor is erected on three sides excluding the opening surface where the elevator door of the hoistway on the top floor is formed. Among these support frames, at least some of the support frames are load-bearing wall frames having braces. The upper beam member arranged to surround the hoistway on the support frame is provided independently of the structural frame of the building, and has a structure that does not transmit the load of the elevator to the cabin assembly provided above the elevator. Therefore, even when the cabin assembly cannot receive the horizontal load at the upper end of the elevator, the load-bearing wall frame can bear the horizontal load.

[0016] In the support structure of the second elevator of the present invention, since the load-bearing wall frames are respectively arranged on three sides excluding the opening surface, the load-bearing wall frames can bear the horizontal load both in the horizontal direction parallel to the opening surface and in the horizontal direction perpendicular to the opening surface, and the elevator can be supported without imposing a burden on the cabin assembly.

[0017] In the support structure of the third elevator of the present invention, since the cabin assembly is a truss structure, even when there is no cabin beam capable of bearing the horizontal load at the lower part of the cabin assembly like a Japanese-style small house, the load-bearing wall frame can bear the horizontal load of the elevator without imposing a burden on the cabin assembly. Therefore, even in the case of performing a renovation to add an elevator, large-scale construction such as replacing the entire cabin assembly is not required, and the construction period and cost can be reduced.

[0018] The support structure of the fourth elevator of the present invention opening surface is provided with an extension portion extending from the outer periphery of the hoistway on the upper beam member arranged above, and since the extension portion is supported by a retaining load-bearing wall frame fixed and erected on the lower beam member, even the surface where opening surface the load-bearing wall frame cannot be arranged due to the formation of the elevator door can have the retaining load-bearing wall frame bear the horizontal load of the elevator.

[0019] The fifth elevator support structure of the present invention is an elevator support structure in which at least one surface of the hoistway faces the outer periphery of the building. The outer peripheral beam installed on the lower side of the top floor of the building has the lower end of the outer peripheral framework that supports the outer wall fixed at the outdoor side position of the upper surface, and the support frame fixed at the indoor side position of the upper surface, which constitutes a part of the aforementioned lower beam member. The height of the outer peripheral framework is formed to be higher than the height of the upper surface of the upper beam member fixed on the support frame and supports the truss structure. Therefore, the elevator support structure can bear the horizontal load of the elevator by the shear wall frame without burdening the truss structure that constitutes the cabin assembly with the horizontal load of the elevator.

[0020] The sixth elevator support structure of the present invention is an elevator support structure installed at a position where the hoistway does not face the outer periphery of the building. Since the upper surface of the upper beam member is lower than the lower surface of the truss structure, the elevator support structure can bear the horizontal load of the elevator by the shear wall frame without burdening the truss structure that constitutes the cabin assembly with the horizontal load of the elevator.

[0021] According to the reform method of the present invention, a support frame including the support frame of the shear wall frame is erected on the lower beam to form the base of three sides excluding the opening surface hoistway. Then, the upper beam is fixed on the support frame, and the upper end of the load support member of the elevator is fixed to the upper beam. Therefore, the horizontal load at the upper end portion of the elevator can be borne by the shear wall frame without burdening the cabin assembly, and an elevator can be added to the building without extensively renovating the cabin assembly.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0023] Hereinafter, embodiments of the elevator support structure 1 and the reform method of the present invention will be described with reference to the respective drawings. The elevator support structure 1 in the present embodiment is, for example, as shown in FIG. 2, an elevator support structure 1 additionally installed in a two-story detached house with a lightweight steel frame structure in which the cabin assembly 2 is a truss structure. The truss structure cabin assembly 2 has a plurality of vertical bundled members 22 arranged at intervals between a pair of upper chord members 20 formed in a gable shape and a horizontal lower chord member 21 connecting the lower ends of these upper chord members 20, and diagonal members 23 are spanned between the upper and lower ends of adjacent bundled members 22 to support a roof member (not shown) without using a beam member with a large cross-sectional area, and a long-span space is formed on the lower side. The truss structure cabin assembly 2 is formed by combining CT-shaped steels in the present embodiment.

[0024] Note that the building 3 in which the elevator support structure 1 is provided is not limited to this, and may be various facilities such as apartment houses, commercial facilities, welfare facilities, and educational facilities, for example. Also, the building 3 is not limited to a two-story building, and may be a building 3 with three or more floors. The building 3 in the elevator support structure 1 of the present invention is not limited to a lightweight steel frame structure, and if the horizontal load at the upper end of the elevator cannot be received by the horizontal members of the cabin assembly 2, for example, a wooden or heavy steel frame building 3 can also be adopted.

[0025] The elevator moves the car room 5 up and down along a hoistway 4 that is rectangular in plan view and penetrates two or more floors. The elevator may be a rope-type elevator that winds a rope with an electric motor to move the car room 5 up and down, or a hydraulic elevator that moves the car room 5 up and down with a hydraulic jack. A guide rail 6 for guiding the car room 5 up and down is provided in the elevator, and this guide rail 6 is a load support member that supports the loads of members that move up and down, such as the car room 5 and a counterweight (not shown).

[0026] As shown in FIGS. 1 and 2, the hoistway 4 is formed in a rectangular shape in plan view so as to penetrate the first floor and the second floor in the present embodiment, and elevator doors (not shown) are provided on the first floor and the second floor, respectively. Partition walls are erected on three sides of the hoistway 4 on the first floor other than the opening surface 12 where the elevator door is formed. Although not shown, groove-shaped runners 10 are fixed to the floor surface and the ceiling surface with screws for the partition walls, and studs 11 are erected between the upper and lower runners 10 to form a wall base, and a gypsum board is attached to the wall base to form the inner peripheral wall of the hoistway 4 on the first floor.

[0027] In addition, the elevator shaft 4 on the second floor is the "top-floor elevator shaft" in the present invention. Support frames 7 in the shape of a rectangular frame are erected on three sides of the elevator shaft 4 on the second floor, excluding the opening surface 12 where the elevator door is formed. A base material (not shown) is fixed to the support frame 7, and a gypsum board (not shown) is attached to the base material to form the inner peripheral wall of the elevator shaft 4. The support frame 7 is fixed and erected on the lower beam member 13 disposed in the floor recess of the top floor. The lower beam member 13 is formed of an H-shaped steel with flanges arranged vertically and a web provided therebetween. Although not shown, the lower beam member 13 is supported at its ends by a rectangular frame-shaped framework or column member fixed and erected on the foundation and is installed to constitute the structural frame of the building 3.

[0028] As shown in FIGS. 1 and 5, the support frame 7 is formed in a rectangular frame shape by welding C-shaped steels so as to open inward. The elevator shaft 4 is formed in a square with one side being approximately 2 m in plan view. The support frame 7 is formed, for example, with a length in the width direction of 1 m and is arranged in two rows on each of the three sides excluding the opening surface 12 of the elevator shaft 4. Although not shown, adjacent support frames 7 are fixed to each other with horizontal tie bolts. At least some of the support frames 7 are load-bearing wall frames 8 to which braces 15 capable of absorbing the horizontal load of the elevator are welded in an X shape. In the present embodiment, one load-bearing wall frame 8 is arranged on each of the three sides excluding the opening surface 12 of the elevator shaft 4.

[0029] On the upper surface of the support frame 7 including the endurance wall frame 8, an upper beam member 14 is fixed so as to surround the hoistway 4. The upper beam member 14 is formed of an H-shaped steel with flanges arranged vertically and a web provided therebetween. The lower flange of the upper beam member 14 is bolted to the upper surface of the support frame 7, and the upper beam member 14 is also installed above the opening surface 12 where the elevator door is formed. Among the upper beam members 14, the upper beam member 14 arranged above the opening surface 12 is formed with an extension portion 16 extending from above the opening surface 12 which is the outer periphery of the hoistway 4 as shown in FIGS. 1 and 3. That is, the upper beam member 14 is arranged in a square shape on the outer periphery of the hoistway 4 in plan view, and the upper beam member 14 at the position where the opening surface 12 is provided is extended and formed.

[0030] And below the extension portion 16, a holding endurance wall frame 9 having the same shape as the above-mentioned endurance wall frame 8 is arranged. That is, the holding endurance wall frame 9 is formed in a rectangular frame shape by welding a C-shaped steel into a rectangle so as to open inward, and an X-shaped brace 15 is welded and fixed inside thereof. The lower flange of the extension portion 16 is bolted to the upper surface of the holding endurance wall frame 9. The holding endurance wall frame 9 is bolted to the lower beam member 13 constituting the structural frame of the building 3.

[0031] The upper beam member 14 fixed to the upper surfaces of the support frame 7 including the endurance wall frame 8 and the holding endurance wall frame 9 is provided independently of the structural frame of the building 3. Specifically, the upper surface of the upper beam member 14 is formed lower than the lower chord member 21 of the truss structure roof assembly 2. For example, the upper beam member 14 and the roof assembly 2 are configured not to contact each other. In addition, the elevator support structure 1 in the present invention only needs to be configured such that the horizontal load generated on the upper beam member 14 is hardly transmitted to the truss structure roof assembly 2. In order to prevent the upper beam member 14 and the lower chord member 21 from colliding and generating abnormal noises, the upper beam member 14 and the roof assembly 2 may be fixed to each other to such an extent that there is no influence in structural calculation.

[0032] As shown in Fig. 4, the guide rail 6 as a load support member of the elevator has its upper end fixed to the upper beam member 14. In addition to the upper end of the guide rail 6, depending on the type of elevator, for example, a pulley for a wire rope that pulls the car chamber 5 and the counterweight upward, a hoisting machine for moving the car chamber 5 of the elevator up and down, and a speed governor may also be fixed to the upper beam member 14. The upper beam member 14 arranged to surround the hoistway 4 may have a machine beam installed across the hoistway 4 in order to install, for example, a pulley or a hoisting machine. The lower end of the guide rail 6 is fixed to an anchor bolt formed in an elevator pit 18 made of reinforced concrete, which is formed on a foundation slab or dirt floor concrete. In addition, the guide rail 6 may also be fixed to the lower beam member 13 arranged between the first floor and the second floor.

[0033] The vertical load of the elevator, mainly of the car chamber 5, can be received by the elevator pit 18 made of reinforced concrete via the guide rail 6 as a load support member. Also, the horizontal load generated during an earthquake or the like is transmitted to the upper beam member 14 via the guide rail 6 and can be received by the shear wall frame 8 fixed to the upper surface.

[0034] Thus, in the support structure 1 of the elevator of this embodiment, the rectangular frame-shaped support frame 7 constituting the hoistway 4 on the second floor is erected on three sides excluding the opening surface 12 where the elevator door of the hoistway 4 is formed, a shear wall frame 8 having a brace 15 on each of the three support frames 7 is formed, and opening surface 12 the extension portion 16 of the upper beam member 14 arranged above is supported by the holding shear wall frame 9, whereby the hoistway 4 on the second floor has resistance to horizontal loads. And since the upper beam member 14 arranged on the support frame 7 receives the horizontal load of the elevator independently of the cabin assembly 2, the support structure 1 of the elevator can bear the horizontal load of the elevator by the shear wall frame 8 without burdening the truss structure constituting the cabin assembly 2 with the horizontal load of the elevator.

[0035] A reform method for adding an elevator with an elevator support structure 1 formed as described above to a building 3 selects a location for installing the elevator considering the floor plan after the reform at a position where the existing building structure and the elevator hoistway 4 do not interfere. Then, the partition wall and the first-floor floor surface at the location where the elevator is to be installed are removed, and the ceiling material on the first floor and the floor material on the second floor are also removed to expose the floor beam on the second floor. If the floor beam on the second floor is formed to surround the hoistway, it is used as the lower beam material 13 that supports the hoistway 4 on the second floor. When the existing floor beam on the second floor is not arranged to surround the hoistway 4, as shown in FIG. 6, for example, a new floor beam is fixed to the existing floor beam by sandwiching it with a splice plate to form the lower beam material 13 that surrounds the hoistway 4.

[0036] After that, as shown in FIG. 7, runners 10 are arranged to surround the hoistway 4, studs 11 are erected, and a gypsum board (not shown) is attached to complete the inner peripheral wall of the hoistway 4 on the first floor.

[0037] Then, as shown in FIG. 8, the support frame 7 is fixed to the upper flange of the lower beam material 13 and erected. The support frame 7 is fixed by bolts to the side of the upper flange of the lower beam material 13 adjacent to the hoistway 4, and floor base materials such as a floor slab and a joist (not shown) can be fixed to the side of the upper flange of the lower beam material 13 away from the hoistway 4. The support frames 7 are arranged in two rows each on three sides excluding the opening surface 12 where the elevator door is formed and are connected by horizontal tie bolts. One support frame 7 on each of the three sides is provided with a shear wall frame 8 with a brace 15 arranged. Further, a holding shear wall frame 9 is fixed to the upper flange of the lower beam material 13 adjacent to the opening surface 12 to erect the support frame 7.

[0038] Then, next, as shown in FIG. 9, fix the lower flange of the upper beam member 14 to the upper surface of the support frame 7 including the shear wall frame 8, install the upper beam member 14 also above the opening surface 12 that will become the elevator door, and fix the lower flange of the extending portion 16 of the upper beam member 14 to the upper surface of the shear wall frame 9 while holding it. If necessary, additionally fix a machine beam to the upper beam member 14. Further, as shown in FIG. 10, when it is necessary to increase the strength of the horizontal frame formed by fixing the upper beam member 14 in a rectangular shape, as shown in FIG. 10, a reinforcing member 24 may be fixed on the diagonal of the quadrilateral formed by the upper beam member 14. The reinforcing member is, for example, a brace. Above the upper beam member 14, a truss structure roof assembly 2 is arranged. Although the upper beam member 14 and the truss structure roof assembly 2 are not structurally connected to each other, the upper beam member 14 and the lower chord member 21 of the roof assembly 2 may be fixed to each other to such an extent that there is no influence in structural calculation in order to prevent them from colliding with each other and generating abnormal noises.

[0039] Next, although not shown, a base material is fixed to the support frame 7, and a gypsum board is attached to the base material to complete the inner peripheral wall of the elevator shaft 4 on the second floor. Then, according to the specifications of the elevator to be installed, fix the lower end of the guide rail 6 as a load support member of the elevator to the elevator pit 18 of the reinforced concrete, and fix the upper end to the upper beam member 14. Also, if necessary, fix the middle part of the guide rail 6 to the lower beam member 13. Then, install a pulley, a hoisting machine, a speed regulator, etc. for operating the elevator, install the car chamber 5 and the counterweight, arrange the wire ropes, and complete the renovation of adding the elevator.

[0040] In this way, the renovation method of this embodiment does not burden the roof assembly 2 with the horizontal load of the elevator even when adding and installing an elevator. Therefore, it is not necessary to extensively renovate the roof assembly 2, and by installing the support frame 7 including the shear wall frame 8, an elevator can be relatively easily added to the building 3.

[0041] The elevator support structure 1 in this embodiment is an elevator support structure 1 installed at a position where the hoistway 4 does not face the outer periphery of the building 3. However, the elevator support structure 1 is not limited to this, and one or more surfaces of the hoistway 4 may be installed facing the outer periphery of the building 3.

[0042] In this case, as shown in FIGS. 11 and 12, among the upper and lower flanges of the outer peripheral beam 13a installed on the lower side of the outer periphery of the second floor, which is the top floor of the building 3, the lower end of the outer peripheral frame 17 that supports the outer wall is fixed at the outdoor side position of the upper flange. The lower chord member 21 of the truss structure's small house assembly 2 is installed at the upper end of the outer peripheral frame 17. And a support frame 7 is fixed at the indoor side position of the upper flange of the outer peripheral beam 13a, and the outer peripheral beam 13a constitutes a part of the lower beam member 13. The lower flange of the upper beam member 14 is fixed to the upper surface of the support frame 7. The upper beam member 14 has the outdoor side of the lower flange fixed to the upper surface of the support frame 7. That is, the upper beam member 14 is arranged closer to the indoor side than the lower beam member 13, which is the outer peripheral beam 13a, by the length of the flange. The outer peripheral frame 17 is formed at a height above the upper surface of the upper beam member 14 fixed on the support frame 7. However, since the upper beam member 14 is arranged closer to the indoor side, the outer peripheral frame 17 can be erected without interfering with the upper beam member 14, and the outer peripheral frame 17 can support the truss structure's small house assembly 2.

[0043] Therefore, since it is not necessary for the outer peripheral frame 17 or the truss structure's small house assembly 2 to bear the horizontal load of the elevator, even when adding an elevator, there is no need to reinforce or repair the outer peripheral frame 17 or the truss structure's small house assembly 2, and an elevator can be relatively easily added and installed in the building 3.

[0044] It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments and can be appropriately changed without departing from the scope of the idea of the present invention.

[0045] 〔First feature〕 The first feature of the elevator support structure of this embodiment is an elevator support structure provided in a building, comprising an elevator shaft in a rectangular shape in plan view formed by penetrating two or more floors including at least the top floor. Among the elevator shafts of the top floor, support frames in a rectangular frame shape are erected on three sides excluding the opening surface where the elevator door is formed. The support frames are fixed and erected on the lower beam member disposed in the floor recess of the top floor, and the lower beam member is supported by the structural frame of the building. An upper beam member disposed so as to surround the elevator shaft and support the load of the elevator is fixed on the support frame. At least a part of the support frames is a shear wall frame having braces for bearing the horizontal shear force of the elevator, and the upper beam member is provided independently of the structural frame of the building and is structured not to transmit the load of the elevator to the cabin assembly provided above the elevator.

[0046] According to this, the rectangular frame-shaped support frames constituting the elevator shaft of the top floor are erected on three sides excluding the opening surface where the elevator door of the elevator shaft of the top floor is formed. Among these support frames, at least a part of the support frames is a shear wall frame having braces. The upper beam member disposed so as to surround the elevator shaft on the support frame is provided independently of the structural frame of the building and is structured not to transmit the load of the elevator to the cabin assembly provided above the elevator. Therefore, even when the cabin assembly cannot receive the horizontal load at the upper end of the elevator, the shear wall frame can bear the horizontal shear force.

[0047] 〔Second Feature〕 The second feature of the elevator support structure of this embodiment is that, in addition to the features of the first elevator support structure, the shear wall frames are respectively arranged on three sides excluding the opening surface.

[0048] According to this, since the shear wall frames are respectively arranged on three sides excluding the opening surface, the shear wall frames can bear the horizontal load both in the horizontal direction parallel to the opening surface and in the horizontal direction perpendicular to the opening surface.

[0049] [Third Feature] The third feature of the support structure of the elevator according to the present embodiment is that, in addition to the features of the support structure of the first elevator, the cabin assembly is a truss structure.

[0050] According to this, since the cabin assembly is a truss structure, even when there is no cabin beam that can bear the horizontal bearing capacity at the lower part of the cabin assembly like a Japanese-style cabin, the shear wall frame can bear the horizontal load of the elevator without imposing a burden on the cabin assembly. Therefore, even in the case of performing a renovation to add an elevator, large-scale construction such as replacing the entire cabin assembly is not required, and the construction period and cost can be reduced.

[0051] [Fourth Feature] The fourth feature of the support structure of the elevator according to the present embodiment is that, in addition to the features of the support structure of any of the second elevators, among the upper beam members, the opening surface the upper beam member disposed above has an extension portion extending from the outer periphery of the hoistway, and the extension portion is supported by a shear wall frame with braces fixed and erected on the lower beam member.

[0052] According to this, opening surface the upper beam member disposed above is provided with an extension portion extending from the outer periphery of the hoistway, and since the extension portion is supported by a shear wall frame with braces fixed and erected on the lower beam member, even in the case where a shear wall frame cannot be arranged due to the formation of an elevator door, opening surface the surface where it is provided can also bear the horizontal load of the elevator by the shear wall frame with braces.

[0053] [Fifth Feature] The fifth feature of the elevator support structure of this embodiment is that, in addition to the features of the third elevator support structure, the elevator is installed such that at least one surface of the hoistway faces the outer periphery of the building, and the outer peripheral beam installed on the outer periphery below the top floor of the building has the lower end of the outer peripheral frame that supports the outer wall fixed at a position on the outdoor side of the upper surface, and the support frame fixed at a position on the indoor side of the upper surface, which constitutes a part of the lower beam member, and the outer peripheral frame is formed at a height higher than the upper surface of the upper beam member fixed on the support frame and supports the truss structure.

[0054] According to this, it is an elevator support structure in which at least one surface of the hoistway faces the outer periphery of the building. The outer peripheral beam installed on the outer periphery below the top floor of the building has the lower end of the outer peripheral frame that supports the outer wall fixed at a position on the outdoor side of the upper surface, and the support frame fixed at a position on the indoor side of the upper surface, which constitutes a part of the aforementioned lower beam member. Also, the height of the outer peripheral frame is formed at a height higher than the upper surface of the upper beam member fixed on the support frame and supports the truss structure. Therefore, the elevator support structure can bear the horizontal load of the elevator by the shear wall frame without burdening the truss structure that constitutes the cabin with the horizontal load of the elevator.

[0055] 〔Sixth Feature〕 The sixth feature of the elevator support structure of this embodiment is that, in addition to the features of the third elevator support structure, the elevator is installed at a position where the hoistway does not face the outer periphery of the building, and the upper surface of the upper beam member is lower than the lower surface of the truss structure.

[0056] According to this, it is an elevator support structure installed at a position where the hoistway does not face the outer periphery of the building. Since the upper surface of the upper beam member is lower than the lower surface of the truss structure, the elevator support structure can bear the horizontal load of the elevator by the shear wall frame without burdening the truss structure that constitutes the cabin with the horizontal load of the elevator.

[0057] 〔Seventh Feature〕 The reform method of this embodiment is a reform method for adding an elevator support structure with a first feature to an existing building. The support frame including the shear wall frame is erected on the lower beam member, and the three sides of the hoistway the opening surface except for are formed. The method further includes fixing the upper beam member on the support frame, and fixing the upper end of the load support member for supporting the elevator car on the upper beam member.

[0058] According to this, a support frame including a support frame of a shear wall frame is erected on the lower side beam, and the three sides of the hoistway opening surface except for are formed. The method further includes fixing the upper side beam on the support frame, and fixing the upper end of the elevator load support member on the upper side beam. Therefore, the horizontal load at the upper end portion of the elevator can be borne by the shear wall frame without burdening the roof structure, and an elevator can be added to the building without extensively renovating the roof structure.

Industrial Applicability

[0059] The elevator support structure and reform method according to the present invention are public when adding an elevator by reform in a low-rise building with a lightweight steel frame truss roof structure.

Explanation of Signs

[0060] 1 Elevator support structure 2 Roof structure 4 Hoistway 5 Car room 6 Guide rail (load support member) 7 Support frame 8 Shear wall frame 9 Backup shear wall frame 12 Opening surface 13 Lower beam member 14 Upper beam member 16 Extension

Claims

1. A support structure for an elevator provided in a building, comprising: a hoistway having a rectangular shape in plan view formed by penetrating through two or more floors including at least the top floor; in the hoistway of the top floor, support frames in the shape of rectangular frames are erected on three sides excluding the opening surface where the elevator door is formed; the support frames are fixed and erected on an under beam member disposed in the floor recess of the top floor; the under beam member is supported by the structural frame of the building; an upper beam member disposed so as to surround the hoistway and supporting the load of the elevator is fixed on the support frames; at least a part of the support frames is a shear wall frame having braces for bearing the horizontal shear resistance of the elevator; the upper beam member is provided independently of the structural frame of the building, and has a structure that does not transmit the load of the elevator to a cabin structure provided above the elevator. A support structure for an elevator, characterized in that.

2. The support structure for an elevator according to claim 1, wherein the shear wall frames are respectively disposed on three sides excluding the opening surface.

3. The support structure for an elevator according to claim 1, wherein the cabin structure is a truss structure.

4. Among the upper beam members, the upper beam member disposed above the opening surface has an extension portion extending from the outer periphery of the hoistway; The support structure for an elevator according to claim 2, wherein the extension portion is supported by a retaining shear wall frame having a brace fixed and erected on the under beam member.

5. The elevator is installed such that at least one surface of the hoistway faces the outer periphery of the building; An outer peripheral beam installed on the outer periphery below the top floor of the building has a lower end of an outer peripheral frame group for supporting an outer wall fixed at an outdoor side position on the upper surface, and the support frame fixed at an indoor side position on the upper surface, and constitutes a part of the under beam member; The support structure for an elevator according to claim 3, wherein the outer peripheral frame group is formed at a height above the upper surface of the upper beam member fixed on the support frame and supports the truss structure.

6. The elevator is installed at a position where the hoistway does not face the outer periphery of the building; The support structure for an elevator according to claim 3, wherein the upper surface of the upper beam member is lower than the lower surface of the truss structure.

7. A reform method for adding the elevator support structure according to claim 1 to an existing building, erecting the support frame including the shear wall frame on the lower beam member to form a base on three sides excluding the opening surface of the hoistway; fixing the upper beam member on the support frame; fixing the upper end of a load support member for supporting an elevator car on the upper beam member; characterized by comprising the above steps.

Images