Construction elevator

Abstract

According to the present invention, an elevator for construction comprises a boarding car supported by a plurality of ropes, a winding machine that winds up the ropes, a temporary machine room in which the winding machine is installed, and a rope fixing device that is disposed in the temporary machine room and is for fixing the ropes or releasing the fixing. The rope fixing device comprises: a plurality of rope drums onto which the plurality of ropes are individually wound and that are able to rotate independently of each other; and a plurality of stopper units that are respectively provided to the rope drums and are able to switch between a first state in which the rotation of the rope drums is fixed and a second state in which the rotation fixing of the rope drums is released.

Description

[Technical Field]

[0001] The present invention relates to a construction elevator. [Background technology]

[0002] At construction sites of high-rise buildings and the like, construction elevators have been introduced that install a temporary machine room in the building's elevator shaft and move the temporary machine room upward as the construction progresses, thereby enabling the elevator car's ascent and descent distance to be extended (see, for example, Patent Document 1). The temporary machine room is equipped with a hoist, sheave, deflector sheave, rope storage unit, rope fixing device, and the like.

[0003] The rope storage section is a section that stores multiple ropes (main ropes) that support the car. The rope storage section stores ropes of a length that can accommodate the expected ascent and descent journey from the lowest floor to the top floor of the completed building. The rope fixing device is equipped with a rope drum around which the rope that is fed out from the rope storage section is wound, and a stopper section that fixes and releases the rotation of the rope drum. The rotation of the rope drum in the rope fixing device is fixed when the temporary machine room is installed on a specified floor and the car is raised and lowered, and is released when the temporary machine room is lifted by a crane. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021 / 1186492 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in conventional construction elevators, the multiple ropes supporting the car are wound around a common rope drum in the rope fixing device, which poses the problem of not being able to adjust the length or tension of each rope individually.

[0006] An object of the present invention is to provide a construction elevator in which the lengths and tensions of the multiple ropes supporting the car can be individually adjusted. [Means for solving the problem]

[0007] In order to solve the above problems, for example, the configurations described in the claims are adopted. The present application includes multiple means for solving the above-mentioned problems, and one example is a construction elevator comprising: a car supported by multiple ropes, a hoist that winds up the rope to raise and lower the car, a temporary machine room in which the hoist is located, and a rope fixing device that is located in the temporary machine room and can fix the rope when the car is in use and release the fixation of the rope when the temporary machine room is raised. The rope fixing device comprises multiple rope drums around which multiple ropes are individually wound and which can rotate independently of each other, and multiple stopper units provided for each rope drum and switchable between a first state in which the rotation of the rope drum is fixed and a second state in which the fixation of the rotation of the rope drum is released. [Effects of the Invention]

[0008] According to the present invention, in a construction elevator, the lengths and tensions of the multiple ropes supporting the car can be individually adjusted. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing a configuration example of a construction elevator according to a first embodiment. [Figure 2] FIG. 2 is a front view showing the configuration of a rope fixing device provided in the construction elevator according to the first embodiment. [Figure 3] 3 is a side view of the rope fixing device shown in FIG. 2 at the position of line ABCD. [Figure 4]FIG. 10 is a side view showing the configuration of a rope fixing device provided in a construction elevator according to a second embodiment. [Figure 5] FIG. 10 is a side view showing the configuration of a rope fixing device provided in a construction elevator according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same functions or configurations are designated by the same reference numerals, and redundant description will be omitted.

[0011] First Embodiment FIG. 1 is a schematic diagram showing a configuration example of a construction elevator according to the first embodiment. As shown in Figure 1, the construction elevator 10 comprises a car 12, a counterweight 14, and a temporary machine room 16. The car 12, the counterweight 14, and the temporary machine room 16 are arranged in an elevator shaft 18. Buffers 20 and 21 are arranged at the bottom of the elevator shaft 18. The buffer 20 is arranged directly below the car 12. The buffer 21 is arranged directly below the counterweight 14.

[0012] The car 12 and the counterweight 14 are each supported by a guide rail (not shown) so as to be movable up and down (raise and lower). A car pulley 22 is attached to the car 12. A weight pulley 23 is attached to the counterweight 14.

[0013] A rope 25, which is the main rope for raising and lowering the elevator, is wound around the car pulley 22 and the weight pulley 23. The car pulley 22 rotates as driven by the rope 25, and rises and falls integrally with the car 12. The weight pulley 23 rotates as driven by the rope 25, and rises and falls integrally with the counterweight 14.

[0014] A plurality of ropes 25 are provided for each cage pulley 22. In other words, the cage pulley 22 is supported by a plurality of ropes 25. The plurality of ropes 25 are arranged at predetermined intervals in the depth direction perpendicular to the plane of FIG.

[0015] The temporary machine room 16 is a machine room that is temporarily set up in the elevator shaft 18 to transport workers, construction materials, and the like at a construction site. A lifting cable 27 of a lifting machine (not shown) is connected to the top of the temporary machine room 16. The lifting machine is a machine that lifts the temporary machine room 16 via the lifting cable 27. The temporary machine room 16 has an upper machine room 16a, a lower machine room 16b, and an extendable beam 16c.

[0016] The telescopic beam 16c is a beam that can be extended and retracted in the left-right direction in Fig. 1. The telescopic beam 16c is a beam for placing and fixing the temporary machine room 16 on a beam (not shown) of a building. When fixing (temporarily installing) the temporary machine room 16 on a predetermined floor, the telescopic beam 16c is in an extended state so that the telescopic beam 16c can be placed on the beam of the building. When lifting the temporary machine room 16, the telescopic beam 16c is in a contracted state so that the telescopic beam 16c does not interfere with the beam of the building.

[0017] The temporary machine room 16 is equipped with a hoisting machine 31, a deflecting sheave 32, a rope fixing device 33, a diverting pulley 34, and a rope storage section 35. The diverting pulley 34 and the rope storage section 35 are arranged in the upper machine room 16a. The hoisting machine 31, the deflecting sheave 32, and the rope fixing device 33 are arranged in the lower machine room 16b.

[0018] The hoisting machine 31 has a sheave 31a that can rotate in both directions, and the rope 25 is wound around this sheave 31a. The hoisting machine 31 winds up the rope 25 by the rotation of the sheave 31a, thereby raising and lowering the car 12 and the counterweight 14 in opposite directions. The deflector wheel 32 is a pulley that guides the rope 25, which is wound around the sheave 31a of the hoisting machine 31, to the weight pulley 23. The rope fixing device 33 is a device that can fix the rope 25 when the car 12 is in use and can release the fixation of the rope 25 when the temporary machine room 16 is lifted. The configuration of the rope fixing device 33 will be explained in detail later.

[0019] The diverting pulley 34 is a pulley that guides the rope 25 that is let out from the rope storage section 35 to the rope fixing device 33. The rope storage section 35 is a section that stores the rope 25 of a length necessary to lift the temporary machine room 16 to a position corresponding to the top floor of the building. The rope storage section 35 stores, for example, multiple ropes 25 wound around a rope storage drum, and when lifting the temporary machine room 16, the rope 25 is let out by rotating the rope storage drum. The rope 25 that is let out from the rope storage section 35 passes through the diverting pulley 34, the rope fixing device 33, the weight pulley 23, the deflector sheave 32, the hoist 31 (sheave 31a), and the car pulley 22 in this order, and is fixed to the rope end fixing part 36 of the temporary machine room 16.

[0020] When using the car 12 in the construction elevator 10 configured as described above, the sheave 31a of the hoisting machine 31 is rotated with the rope 25 fixed by the rope fixing device 33. As a result, the car 12 and the counterweight 14 rise and fall as the rope 25 is driven by the rotation of the sheave 31a. Specifically, when the sheave 31a is rotated clockwise in FIG. 1, the car 12 rises and the counterweight 14 falls. When the sheave 31a is rotated counterclockwise in FIG. 1, the car 12 falls and the counterweight 14 rises.

[0021] On the other hand, when the car 12 is stopped from being used and the temporary machine room 16 is to be lifted, the telescopic beam 16c of the temporary machine room 16 is retracted to release the temporary machine room 16 from its fixed position on the building, and in this state, the temporary machine room 16 is moved upward by the lifting cable 27 of the crane. Then, once the temporary machine room 16 has been moved to the destination floor, the telescopic beam 16c is extended to secure the temporary machine room 16. Furthermore, when the temporary machine room 16 is moved to the upper floor, the length of the rope 25 is insufficient for the lifting stroke after the movement. For this reason, when the temporary machine room 16 is to be lifted, the rope 25 fixed by the rope fixing device 33 is released, and a predetermined length of the rope 25 is let out from the rope storage section 35.

[0022] Fig. 2 is a front view showing the configuration of the rope fixing device provided in the construction elevator according to the first embodiment. Fig. 3 is a side view of the rope fixing device shown in Fig. 2, taken along line ABCD. In Fig. 2 and Fig. 3, in order to clarify the structure and positional relationship of each part of the rope fixing device, two orthogonal axial directions parallel to the horizontal plane are defined as the X direction and the Y direction, and the direction parallel to the vertical plane is defined as the Z direction.

[0023] As shown in Figures 2 and 3, the rope fixing device 33 has a housing 40. The housing 40 is composed of a pair of frames 41, a ceiling member 42, and a floor member 43 (Figure 2). The pair of frames 41 are arranged facing each other in the Y direction. The ceiling member 42 spans between the upper ends of the pair of frames 41. The floor member 43 spans between the lower ends of the pair of frames 41. The lower ends of the pair of frames 41, together with the floor member 43, are fixed to the floor surface 16d of the temporary machine room 16.

[0024] Two main shafts 45 are attached to the pair of frames 41. The two main shafts 45 are arranged in a pair in the Z direction (up and down direction). Each main shaft 45 is arranged parallel to the Y direction. Both ends of each main shaft 45 form small-diameter portions 45a, which have a partially small outer diameter. The small-diameter portions 45a of the main shafts 45 fit into holes provided in the frame 41. Furthermore, both ends (small-diameter portions 45a) of each main shaft 45 are fixed to the frame 41 by shaft fixing members 46.

[0025] Four rope drums 47a, 47b, 47c, and 47d are attached to the upper main shaft 45. The four rope drums 47a, 47b, 47c, and 47d are separated from one another in the Y direction. The four rope drums 47a, 47b, 47c, and 47d are arranged adjacent to one another in the Y direction. The four rope drums 47a, 47b, 47c, and 47d are each rotatably attached to the main shaft 45. In other words, the four rope drums 47a, 47b, 47c, and 47d are drums that can rotate independently of one another. Bearings (not shown) may be attached to the main shaft 45 to ensure smooth rotation of each of the rope drums 47a, 47b, 47c, and 47d. Meanwhile, four rope drums 47a, 47b, 47c, and 47d are also attached to the lower main shaft 45. That is, the rope drum 47a is arranged in pairs in the Z direction, similar to the main shaft 45. This also applies to the other rope drums 47b, 47c, and 47d. The attachment state of the four rope drums 47a, 47b, 47c, and 47d to the main shaft 45 is the same on the upper and lower sides.

[0026] The rope drums 47a, 47b, 47c, and 47d have a common configuration. Therefore, in the following description, except when it is necessary to distinguish between the rope drums 47a, 47b, 47c, and 47d, the rope drums 47a, 47b, 47c, and 47d will be collectively referred to as the rope drum 47. The configuration of the rope drum 47 will be described in detail below.

[0027] The rope drum 47 has a circumferential groove 51 (FIG. 2) for winding the rope 25, a plurality of pin insertion holes 52, and a gear portion 53. The rope drum 47 supports the rope 25 by the traction force generated when the rope 25 is wound around the circumferential groove 51. A plurality of circumferential grooves 51 are formed in the Y direction so that one rope 25 can be wound around one rope drum 47 multiple times (three times in the illustrated example).

[0028] A plurality of pin insertion holes 52 are provided on the outer peripheral surface of the rope drum 47. The plurality of pin insertion holes 52 are arranged at a predetermined angular pitch in the circumferential direction of the rope drum 47. In other words, the plurality of pin insertion holes 52 are arranged at offset positions in the circumferential direction of the rope drum 47. Each pin insertion hole 52 is formed as a recess at a predetermined depth from the outer peripheral surface of the rope drum 47. In the present embodiment, as an example, a total of 12 pin insertion holes 52 are formed on the outer peripheral surface of the rope drum 47 at a pitch of 30 degrees. Each pin insertion hole 52 is arranged between the circumferential groove 51 and the gear portion 53 in the Y direction. The gear portion 53 is formed on the outermost peripheral portion of the rope drum 47. The gear portion 53 is formed integrally with the rope drum 47. Therefore, the gear portion 53 rotates integrally with the rope drum 47 around the main shaft 45.

[0029] The rope fixing device 33 also includes a plurality of rotation operation units 55a, 55b, 55c, and 55d. The rotation operation units 55a, 55b, 55c, and 55d are provided for the rope drums 47a, 47b, 47c, and 47d, respectively. Specifically, the rotation operation unit 55a is provided corresponding to the rope drum 47a, and the rotation operation unit 55b is provided corresponding to the rope drum 47b. The rotation operation unit 55c is provided corresponding to the rope drum 47c, and the rotation operation unit 55d is provided corresponding to the rope drum 47d.

[0030] The rotation operation units 55a, 55b, 55c, and 55d have a common configuration. Therefore, in the following description, except when it is necessary to distinguish between the rotation operation units 55a, 55b, 55c, and 55d, the rotation operation units 55a, 55b, 55c, and 55d will be collectively referred to as the rotation operation unit 55. In addition, in this embodiment, a total of eight rope drums 47 are provided, and therefore a total of eight rotation operation units 55 are also provided. The configuration of the rotation operation unit 55 will be described in detail below.

[0031] The rotation operation unit 55 is composed of a rope winding shaft 56 and a gear 57. One rope winding shaft 56 is provided for each rope drum 47, and one gear 57 is also provided for each rope drum 47. In this embodiment, a total of eight rope drums 47 are provided, and therefore a total of eight rope winding shafts 56 and gears 57 are also provided. Of the eight rope winding shafts 56, the four upper rope winding shafts 56 are arranged so as to follow the lower circumferential surface of the rope drum 47 attached to the upper main shaft 45, and the four lower rope winding shafts 56 are arranged so as to follow the upper circumferential surface of the rope drum 47 attached to the lower main shaft 45.

[0032] 2 shows only one of the four upper rope winding shafts 56 and only one of the four lower rope winding shafts 56. In addition, in FIG. 2, the four lower gears 57 are arranged on the same axis, but in reality, as shown in FIG. 3, the four lower gears 57 are arranged at offset positions in the circumferential direction of the rope drum 47 together with the four rope winding shafts 56 corresponding to these four gears 57. This also applies to the four upper gears 57.

[0033] Each rope winding shaft 56 is rotatably attached to a pair of frames 41. One end 58 of each rope winding shaft 56 is disposed so as to protrude outward from the frame 41. Furthermore, one end 58 of each rope winding shaft 56 is formed in a hexagonal shape when viewed from the direction of the central axis of the rope winding shaft 56 (the left side in FIG. 2). The shape of one end 58 of each rope winding shaft 56 is determined depending on the tool used to rotate the rope winding shaft 56, and may be a shape other than a hexagon.

[0034] The gears 57 are fixedly attached to the rope winding shaft 56 so as to rotate integrally with the rope winding shaft 56. The gears 57 mesh with the gear portions 53 of the rope drum 47. Specifically, the four upper gears 57 mesh with the gear portions 53 of the corresponding rope drums 47a, 47b, 47c, and 47d. Similarly, the four lower gears 57 mesh with the gear portions 53 of the corresponding rope drums 47a, 47b, 47c, and 47d.

[0035] In the rotation operation unit 55 having the above configuration, when a tool such as a spanner or wrench is fitted to one end 58 of the rope winding shaft 56 and the rope winding shaft 56 is rotated using this tool, the gear 57 rotates integrally with the rope winding shaft 56. Furthermore, when the gear 57 rotates, the rope drum 47 having the gear portion 53 meshing with the gear 57 rotates. As described above, a rotation operation unit 55 is provided for each rope drum 47. Therefore, each rope drum 47 can be rotated individually by the rotation operation unit 55. However, rotation of the rope drum 47 is not permitted when the rotation of the rope drum 47 is fixed by the stopper portion 61 described below, but is permitted when the rotation fixation of the rope drum 47 is released by the stopper portion 61.

[0036] The rope fixing device 33 includes a plurality of stopper portions 61a, 61b, 61c, and 61d. The stopper portions 61a, 61b, 61c, and 61d are provided for the rope drums 47a, 47b, 47c, and 47d, respectively. Specifically, the stopper portion 61a is provided corresponding to the rope drum 47a, and the stopper portion 61b is provided corresponding to the rope drum 47b. Furthermore, the stopper portion 61c is provided corresponding to the rope drum 47c, and the stopper portion 61d is provided corresponding to the rope drum 47d.

[0037] The stopper portions 61a, 61b, 61c, and 61d have a common configuration. Therefore, in the following description, the stopper portions 61a, 61b, 61c, and 61d will be collectively referred to as stopper portion 61, except when it is necessary to distinguish between the stopper portions 61a, 61b, 61c, and 61d. In addition, in this embodiment, a total of eight rope drums 47 are provided, and therefore a total of eight stopper portions 61 are also provided. The configuration of the stopper portions 61 will be described in detail below.

[0038] The stopper portion 61 is switchable between a first state in which the rotation of the rope drum 47 is fixed and a second state in which the rotation of the rope drum 47 is released. The stopper portion 61 includes a stopper pin 62 that can be inserted into and removed from the pin insertion hole 52 of the rope drum 47, a cylinder 63 as a support member that movably supports the stopper pin 62, and a lid body 64 as a restricting member that restricts the movement of the stopper pin 62.

[0039] The stopper pin 62 is configured as a pin with a circular cross section (round pin). The tip portion 65 of the stopper pin 62 has a partially reduced outer diameter. The outer diameter of the tip portion 65 is slightly smaller than the inner diameter of the pin insertion hole 52. This allows the tip portion 65 of the stopper pin 62 to be inserted into and removed from the pin insertion hole 52.

[0040] The cylinder 63 is attached to a base 66 (FIG. 3). The cylinder 63 supports a stopper pin 62 so that the stopper pin 62 is movable in the X direction. The lid 64 is attached to the cylinder 63 using a plurality of bolts 67.

[0041] When the cover body 64 is attached to the cylinder 63, the cover body 64 is disposed close to the rear end of the stopper pin 62. In this state, with the tip portion 65 of the stopper pin 62 inserted into the pin insertion hole 52 of the rope drum 47, the movement of the stopper pin 62 is restricted by the cover body 64. Furthermore, the rotation of the rope drum 47 is prevented by the tip portion 65 of the stopper pin 62 being inserted into the pin insertion hole 52. Therefore, the state in which the tip portion 65 of the stopper pin 62 is inserted into the pin insertion hole 52 corresponds to a state in which the rotation of the rope drum 47 is fixed, i.e., the first state.

[0042] In contrast, in a state where the cover body 64 is removed from the cylinder 63, the stopper pin 62 can be moved in the left-right direction (X direction) in Fig. 3. Furthermore, when the stopper pin 62 is moved in the right direction in Fig. 3 from the state shown in Fig. 3, the tip portion 65 of the stopper pin 62 is pulled out from the pin insertion hole 52. Rotation of the rope drum 47 is permitted by pulling out the tip portion 65 of the stopper pin 62 from the pin insertion hole 52. Therefore, the state where the tip portion 65 of the stopper pin 62 is pulled out from the pin insertion hole 52 corresponds to a state where the rotation fixation of the rope drum 47 is released, that is, the second state.

[0043] In this way, the stopper portion 61 is configured to be switchable between a first state and a second state by inserting and removing the tip portion 65 of the stopper pin 62 into and from the pin insertion hole 52 of the rope drum 47.

[0044] Next, the operation of the rope fixing device 33 configured as described above will be described. First, when using the car 12 in the construction elevator 10, it is necessary to fix the rope 25 with the rope fixing device 33. For this reason, in the rope fixing device 33, the rotation of all of the rope drums 47a, 47b, 47c, and 47d is fixed by the corresponding stopper portions 61a, 61b, 61c, and 61d. Specifically, the stopper pin 62 of the stopper portion 61a is inserted into the pin insertion hole 52 of the rope drum 47a, and the stopper pin 62 of the stopper portion 61b is inserted into the pin insertion hole 52 of the rope drum 47b. Furthermore, the stopper pin 62 of the stopper portion 61c is inserted into the pin insertion hole 52 of the rope drum 47c, and the stopper pin 62 of the stopper portion 61d is inserted into the pin insertion hole 52 of the rope drum 47d. As a result, the rotation of each of the rope drums 47a, 47b, 47c, and 47d is fixed. Therefore, a total of four ropes 25 can be fixed, one rope wound around each of the rope drums 47a, 47b, 47c, and 47d.

[0045] On the other hand, when the use of the car 12 is stopped and the temporary machine room 16 is lifted, the rope 25 is let out from the rope storage section 35 to extend the length of the rope from the rope fixing device 33 to the rope end fixing section 36, so it is necessary to release the fixation of the rope 25 by the rope fixing device 33. For this reason, in the rope fixing device 33, the rotation fixation of each of the rope drums 47a, 47b, 47c, and 47d is released by the corresponding stopper portions 61a, 61b, 61c, and 61d. Specifically, the stopper pin 62 of the stopper portion 61a is pulled out from the pin insertion hole 52 of the rope drum 47a, and the stopper pin 62 of the stopper portion 61b is pulled out from the pin insertion hole 52 of the rope drum 47b. Furthermore, the stopper pin 62 of the stopper portion 61c is pulled out from the pin insertion hole 52 of the rope drum 47c, and the stopper pin 62 of the stopper portion 61d is pulled out from the pin insertion hole 52 of the rope drum 47d. As a result, the rotational fixation of each of the rope drums 47a, 47b, 47c, and 47d is released. Therefore, a total of four ropes 25, one rope wound around each of the rope drums 47a, 47b, 47c, and 47d, can be fed out toward the weight pulley 23 by the amount fed out from the rope storage section 35. Furthermore, in this embodiment, because one rope 25 is wound around each of the rope drums 47a, 47b, 47c, and 47d, the length of each rope 25 can be individually extended by rotating the corresponding rope drum 47a, 47b, 47c, and 47d.

[0046] If a single rope drum (not shown) were used instead of the four rope drums 47a, 47b, 47c, and 47d and the four ropes 25 were wound around this single rope drum, the four ropes 25 would always be wound up at the same length when the single rope drum was rotated. For this reason, the length and tension of each rope 25 could not be adjusted individually.

[0047] In contrast, in this embodiment, multiple rope drums 47a, 47b, 47c, and 47d are provided to be independently rotatable, and stopper portions 61a, 61b, 61c, and 61d are provided for each of the rope drums 47a, 47b, 47c, and 47d, respectively. Therefore, the length and tension of each rope 25 can be adjusted individually.

[0048] As a result, for example, when lifting the temporary machine room 16, if one of the four ropes 25 fed from the rope storage section 35, wound around the rope drum 47a, is too long or has too little tension compared to the other three ropes 25 wound around the other rope drums 47b, 47c, and 47d, it is possible to adjust the length and tension of only that one rope 25. Specifically, after switching only the stopper section 61a corresponding to the rope drum 47a from the first state to the second state, the rope drum 47a is rotated by the rotation operating section 55a. Then, the rope drum 47a is rotated by the rotation operating section 55a until the length and tension of the one rope 25 are approximately equal to the lengths and tensions of the other three ropes 25, and the rope 25 is wound up. After that, the stopper section 61a is switched from the second state to the first state. This allows the lengths and tensions of all four ropes 25 to be uniform.

[0049] In addition, in this embodiment, the stopper portion 61 is provided with a stopper pin 62 that can be inserted into and removed from the pin insertion hole 52 of the rope drum 47. This makes it possible to easily switch the state (first state, second state) of the stopper portion 61 by inserting and removing the stopper pin 62.

[0050] In addition, in this embodiment, a configuration is adopted in which the stopper pin 62 is movably supported by the cylinder 63, and the movement of the stopper pin 62 inserted into the pin insertion hole 52 is restricted by the lid body 64. This allows the stopper pin 62 to reliably prevent the rope drum 47 from rotating.

[0051] In this embodiment, the rope fixing device 33 is provided with a rotation operation unit 55 that rotates the rope drum 47 in the second state. This allows the rope drum 47 to be easily rotated.

[0052] The number of ropes 25 for which the length and tension of the rope 25 are adjusted is not limited to one, and may be two or more. Also, the length and tension of all of the ropes 25 may be adjusted.

[0053] Second Embodiment FIG. 4 is a side view showing the configuration of a rope fixing device provided in a construction elevator according to the second embodiment. The construction elevator according to the second embodiment differs from the first embodiment in the configuration of the stopper portion of the rope fixing device. The configuration of the stopper portion will be described in detail below.

[0054] As shown in FIG. 4, the stopper portion 611 includes a stopper pin 621 that can be inserted into and removed from the pin insertion hole 52 of the rope drum 47, a cylinder 631 as a support member that movably supports the stopper pin 621, a spring 641 as a biasing member that biases the stopper pin 621, and a pressing member 651 that presses the spring 641.

[0055] The stopper pin 621 is configured as a pin with a circular cross section. The outer diameter of a tip portion 661 of the stopper pin 621 is partially reduced. The outer diameter of the tip portion 661 is slightly smaller than the inner diameter of the pin insertion hole 52 of the rope drum 47. This allows the tip portion 661 of the stopper pin 621 to be inserted into and removed from the pin insertion hole 52. In addition, a flange portion 671 is formed integrally with the stopper pin 621. The flange portion 671 is the portion that receives the biasing force of the spring 641.

[0056] The cylinder 631 is attached to the top of the base 66. The cylinder 631 supports the stopper pin 621 so that the stopper pin 621 is movable in the X direction.

[0057] The spring 641 is a member that biases the stopper pin 621 in a direction (leftward in FIG. 4) in which the stopper pin 621 is inserted into the pin insertion hole 52 of the rope drum 47. The spring 641 is made of a coil spring.

[0058] Pressing member 651 is attached to cylinder 631 using a plurality of bolts 681. Pressing member 651 is attached to cylinder 631 with spring 641 sandwiched between pressing member 651 and flange 671 of stopper pin 621. As a result, spring 641 is compressed between flange 671 and pressing member 651, and the reaction force from this compression urges stopper pin 621 to the left in FIG. 4. In addition, flange 671 is pressed against stepped portion 691 of cylinder 631 by the urging force of spring 641.

[0059] In the stopper portion 611 having the above-described configuration, the biasing force of the spring 641 arranged inside the cylinder 631 is applied to the flange portion 671 of the stopper pin 621, and the biasing force causes the tip portion 661 of the stopper pin 621 to be inserted into the pin insertion hole 52 of the rope drum 47. In this state, the rotation of the rope drum 47 is prevented by the stopper pin 621. Therefore, the state in which the tip portion 661 of the stopper pin 621 is inserted into the pin insertion hole 52 corresponds to a state in which the rotation of the rope drum 47 is fixed, that is, the first state.

[0060] 4 against the biasing force of the spring 641, the tip 661 of the stopper pin 621 is pulled out of the pin insertion hole 52 of the rope drum 47. Rotation of the rope drum 47 is permitted by pulling out the tip 661 of the stopper pin 621 from the pin insertion hole 52. Therefore, the state in which the tip 661 of the stopper pin 621 is pulled out of the pin insertion hole 52 corresponds to a state in which the rotation fixation of the rope drum 47 is released, that is, the second state.

[0061] In this way, the stopper portion 611 is configured to be switchable between a first state and a second state by inserting and removing the tip portion 661 of the stopper pin 621 into and from the pin insertion hole 52 of the rope drum 47.

[0062] In the second embodiment, even when the pressing member 651 is attached to the cylinder 631, the tip portion 661 of the stopper pin 621 can be inserted into and removed from the pin insertion hole 52 of the rope drum 47. This allows the state (first state, second state) of the stopper portion 611 to be quickly switched. Furthermore, when the stopper portion 611 is set to the first state, the tip portion 661 of the stopper pin 621 is maintained in a state inserted into the pin insertion hole 52 by the biasing force of the spring 641. Therefore, the rotation of the rope drum 47 can be reliably prevented by the stopper pin 621.

[0063] As a method for pulling out the tip 661 of the stopper pin 621 from the pin insertion hole 52, there is also a method of removing the pressing member 651 from the cylinder 631 and pulling the stopper pin 621 to the right in FIG.

[0064] <Third embodiment> FIG. 5 is a side view showing the configuration of a rope fixing device provided in a construction elevator according to the third embodiment. The construction elevator according to the third embodiment differs from the first embodiment in the configuration of the stopper portion of the rope fixing device. The configuration of the stopper portion will be described in detail below.

[0065] As shown in FIG. 5, the stopper portion 612 includes a brake shoe 622, a stopper pin 632 that supports the brake shoe 622, a cylinder 642 as a support member that movably supports the stopper pin 632, a spring 652 as a pressing member that biases the stopper pin 632, and a pressing member 662 that presses the spring 652.

[0066] The brake shoe 622 is disposed facing the outer peripheral surface of the rope drum 47. The brake shoe 622 is made of, for example, resin. The brake shoe 622 is attached to the tip of the stopper pin 632. The braking surface of the brake shoe 622 is curved along the outer peripheral surface of the rope drum 47 so as to be in close contact with the outer peripheral surface of the rope drum 47. The brake shoe 622 is pressed against the outer peripheral surface of the rope drum 47 by the biasing force of the spring 652. The outer peripheral surface of the rope drum 47 may be formed with irregularities to increase the braking force of the brake shoe 622.

[0067] The stopper pin 632 is configured as a pin with a circular cross section. A flange portion 672 is formed integrally with the stopper pin 632. The flange portion 672 is a portion that receives the biasing force of the spring 652.

[0068] The cylinder 642 is attached to the top of the base 66. The cylinder 642 supports the stopper pin 632 so that the stopper pin 632 is movable in the X direction.

[0069] The spring 652 is a member that biases the stopper pin 632 so as to press the brake shoe 622 against the outer peripheral surface of the rope drum 47. The spring 652 is formed of a coil spring.

[0070] Pressing member 662 is attached to cylinder 642 using multiple bolts 682. Pressing member 662 is attached to cylinder 642 with spring 652 sandwiched between pressing member 662 and flange 672 of stopper pin 632. As a result, spring 652 is compressed between flange 672 and pressing member 662, and the reaction force caused by this compression urges stopper pin 632 in the left direction in FIG.

[0071] In the stopper portion 612 configured as described above, the biasing force of the spring 652 arranged inside the cylinder 642 is applied to the flange portion 672 of the stopper pin 632, and this biasing force presses the brake shoe 622 against the outer peripheral surface of the rope drum 47. In this state, the rotation of the rope drum 47 is prevented by the braking force of the brake shoe 622. Therefore, the state in which the brake shoe 622 is pressed against the outer peripheral surface of the rope drum 47 corresponds to a state in which the rotation of the rope drum 47 is fixed, i.e., the first state.

[0072] 5 against the biasing force of the spring 652, the brake shoe 622 is pulled away from the outer peripheral surface of the rope drum 47. Rotation of the rope drum 47 is permitted by the brake shoe 622 being separated from the outer peripheral surface of the rope drum 47. Therefore, the state in which the brake shoe 622 is separated from the outer peripheral surface of the rope drum 47 corresponds to a state in which the rotation fixation of the rope drum 47 is released, i.e., the second state.

[0073] In this way, the stopper portion 612 is configured to be switchable between a first state and a second state by pressing the brake shoe 622 against or pulling away from the outer peripheral surface of the rope drum 47.

[0074] In the third embodiment, the brake shoe 622 can be pressed against or pulled away from the outer circumferential surface of the rope drum 47 even with the pressing member 662 attached to the cylinder 642. This allows the state (first state, second state) of the stopper portion 612 to be quickly switched. Furthermore, when the stopper portion 612 is in the first state, the brake shoe 622 is maintained in a state pressed against the outer circumferential surface of the rope drum 47 by the biasing force of the spring 652. Therefore, the brake shoe 622 can reliably prevent the rope drum 47 from rotating.

[0075] As a method for separating the brake shoe 622 from the outer peripheral surface of the rope drum 47, the pressing member 662 may be removed from the cylinder 642 and the stopper pin 632 may be pulled in to the right in FIG.

[0076] <Modifications, etc.> The present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to facilitate understanding of the present invention, but the present invention is not necessarily limited to those including all of the configurations described in the above-described embodiments. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to delete part of the configuration of each embodiment, add other configurations, or replace it with other configurations.

[0077] For example, in the above embodiment, four rope drums 47a, 47b, 47c, and 47d are provided on the upper and lower sides of the rope fixing device 33, respectively, but the four rope drums 47a, 47b, 47c, and 47d do not necessarily have to be arranged in pairs above and below. In other words, the rope fixing device 33 may be configured to include multiple rope drums so that multiple ropes 25 can be wound around them individually.

[0078] In addition, in the above embodiment, a configuration is adopted in which one car 12 is supported by four ropes 25, so four rope drums 47a, 47b, 47c, and 47d are provided in the rope fixing device 33 to match the number of ropes 25, but the number of ropes 25 and the number of rope drums 47 may each be two or more. [Explanation of symbols]

[0079] 10... Construction elevator, 12... Car, 16... Temporary machine room, 25... Rope, 31... Hoist, 33... Rope fixing device, 47, 47a, 47b, 47c, 47d... Rope drum, 52... Pin insertion hole, 55, 55a, 55b, 55c, 55d... Rotation operation part, 61a, 61b, 61c, 61d, 611, 612... Stopper part, 62, 621, 632... Stopper pin, 63... Cylinder (support member), 64... Cover body (regulating member), 622... Brake shoe, 641... Spring (biasing member), 652... Spring (pressing member)

Claims

1. a car supported by a plurality of ropes; a hoist that winds up the rope to raise and lower the car; a temporary machine room in which the hoisting machine is disposed; a rope fixing device that is disposed in the temporary machine room and that fixes the rope when the elevator car is used and that can release the fixation of the rope when the temporary machine room is lifted; The rope fixing device is A plurality of rope drums around which the plurality of ropes are individually wound and which can rotate independently of each other; A plurality of stopper portions are provided for each rope drum and are switchable between a first state in which the rotation of the rope drum is fixed and a second state in which the rotation of the rope drum is released. Construction elevator.

2. A plurality of pin insertion holes are provided on the outer peripheral surface of the rope drum, The stopper portion has a stopper pin that can be inserted into and removed from the pin insertion hole. The construction elevator according to claim 1.

3. The stopper portion includes a support member that movably supports the stopper pin, and a restricting member that restricts movement of the stopper pin when the stopper pin is inserted into any one of the plurality of pin insertion holes. The construction elevator according to claim 2.

4. The stopper portion includes a support member that movably supports the stopper pin, and a biasing member that biases the stopper pin in a direction to be inserted into the pin insertion hole. The construction elevator according to claim 2.

5. The stopper portion includes a brake shoe arranged facing the outer peripheral surface of the rope drum, a stopper pin supporting the brake shoe, a support member supporting the stopper pin movably, and a pressing member biasing the stopper pin so as to press the brake shoe against the outer peripheral surface of the rope drum. The construction elevator according to claim 1.

6. The rope fixing device is provided for each of the rope drums and includes a rotation operating unit that rotates the rope drum under the second state. The construction elevator according to claim 1.

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