Elevator

Abstract

Disclosed is an elevator which enables provision of a permanent maintenance device and further space saving, even with a hoist and a control panel provided in the hoistway. In this elevator, a hoist (3) and a control panel (30) provided in a hoistway (1) The elevator comprises a contactless position detection device (200) that detects the position of a car (4) and is provided adjacently to a car door threshold and a boarding area door threshold, and an electric emergency stop device that is operated by a ropeless governor system provided with a contactless speed detector (60). In the hoistway are a first space (SP1) and a second space (SP2) which are positioned on either side of a first guide rail (2A) that guides the car, and a third space (SP3) and a fourth space (SP4) which are positioned on either side of a second guide rail (2B) that guides the car. The control panel is provided to one space among the first space, second space, third space, and fourth space, and the hoist and a counterweight (50) are provided to another space among said spaces.

Description

[Technical field]

[0001] The present invention relates to an elevator in which a hoist and a control panel are installed inside a hoistway. [Background technology]

[0002] Machine room-less elevators (see Patent Document 1, for example) in which the hoist and control panel are installed inside the hoistway are widely installed in train stations and other locations where there is no space available for a machine room. Machine room-less elevators are also widely installed in low- to mid-rise buildings, where the installation of a machine room would affect the available space. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-10434 Summary of the Invention [Problem to be solved by the invention]

[0004] In a machine room elevator, like an elevator with a machine room, equipment such as a governor device and a shield plate that serves as the target of detection by a position detection sensor are installed in the hoistway. For this reason, it is difficult to further reduce space or to permanently install dedicated maintenance equipment (e.g., a pit ladder).

[0005] Therefore, the present invention provides an elevator that allows further space saving and permanent installation of dedicated maintenance equipment while still having a hoisting machine and a control panel installed inside the hoistway. [Means for solving the problem]

[0006] In order to solve the above problems, the elevator according to the present invention has a hoist and a control panel provided in a hoistway, and is equipped with a non-contact type position detection device that detects the position of a car and is provided adjacent to a car door threshold and a landing door threshold, and an electric emergency stop device that is operated by a ropeless governor system equipped with a non-contact type speed detector, and the elevator has a first space and a second space located on both sides of a first guide rail that guides the car, and a third space and a fourth space located on both sides of a second guide rail that guides the car, and a control panel is provided in one of the first space, the second space, the third space, and the fourth space, and a hoist and a counterweight are provided in the other space. and, in addition, one of the following means is provided: . The first means is that dedicated maintenance equipment is permanently installed in the spaces other than the one space and the other one space among the first space, the second space, the third space, and the fourth space. The second means is that the control panel is provided in the first space, the hoist and the counterweight are provided in the second space, and dedicated maintenance equipment is permanently installed in the fourth space. Effect of the Invention

[0007] According to the present invention, it is possible to further reduce the space required for an elevator in which a hoist and a control panel are installed inside a hoistway. Also, in an elevator in which a hoist and a control panel are installed inside a hoistway, it is possible to secure a space in which dedicated maintenance equipment can be permanently installed.

[0008] Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing the schematic configuration of an elevator according to an embodiment of the present invention in the height direction within a hoistway. [Diagram 2] FIG. 2 is a plan view of the elevator of this embodiment as seen from above the car. [Diagram 3] 1 is a front view of a car and an electric emergency stop device, showing an example of a schematic configuration of the electric emergency stop device in the present embodiment. FIG. [Figure 4] 13 is a front view of a car and an electric emergency stop device, showing another example of the schematic configuration of the electric emergency stop device in the present embodiment. FIG. [Diagram 5]3 is a schematic diagram showing an example of an image of an exposed surface of a car guide rail 2A (FIG. 2). FIG. [Figure 6] 1 is a side view of a part of a car and a part of a landing, showing an example of a schematic configuration of a non-contact position detection device in this embodiment. [Figure 7] 13 is a side view of a part of a car and a part of a landing, showing another example of the schematic configuration of a non-contact position detection device in the present embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, in which like reference numbers in the various drawings indicate like components or components with similar functions.

[0011] Fig. 1 is a diagram showing the schematic configuration of an elevator according to an embodiment of the present invention in the height direction within a hoistway, and Fig. 2 is a plan view of the elevator according to this embodiment as viewed from above the car within the hoistway.

[0012] As shown in Fig. 1, in the elevator of this embodiment, a hoist 3 supported by a machine beam 3B is installed near the top of the hoistway 1. A car 4 and a counterweight 50 are suspended in the hoistway 1 by a main rope 40. One end of the main rope 40 is fixed to the machine beam 3B, and is further wound around a pulley 50A provided on the counterweight 50, a sheave 3A of the hoist 3, a car under pulley 4B (Fig. 2) provided at the bottom of the car 4, and a car under pulley 4A, in that order. Although not shown, the other end of the main rope 40 is fixed near the top of the hoistway 1.

[0013] A control panel 30 that houses a drive device (for example, an inverter device) that drives the hoisting machine 3 and a control device that controls the operation of the car 4 in a housing is installed near the top of the hoistway 1.

[0014] In this embodiment, the vicinity of the top is the area in the hoistway 1 between the top floor surface and the top of the hoistway, that is, the so-called overhead.

[0015] In the elevator system of this embodiment, the non-contact type position detection device 200 that detects the position of the car 4 is composed of a moving part ("200A" in Fig. 2) provided adjacent to the car floor surface at the front lower part of the car, and a fixed part ("200B" in Fig. 2) fixed adjacent to the landing floor surface in the hoistway 1. The fixed part functions as a floor position setting device.

[0016] The control device in the control panel 30 controls the speed of the car 4 and lands the car 4 on each floor in response to a position detection signal from the non-contact position detection device 200 and a rotation detection signal from a rotation detector (e.g., a rotary encoder) not shown that detects the rotation of the hoist 3.

[0017] The car 4 is provided with an electric safety device 100. In the electric safety device 100, when the car 4 falls into an overspeed state, the brake shoe is pulled up by an electric actuator, as described later (FIGS. 3 and 4). This electric actuator is operated by a ropeless governor system that does not use a governor rope. This ropeless governor system has a non-contact type speed detector 60.

[0018] A pit ladder 300, which is a dedicated maintenance device, is permanently installed near the bottom of the elevator shaft 1, i.e., in the pit. When a maintenance technician works in the pit, he or she uses the pit ladder 300 to descend to the pit. In this embodiment, the pit ladder 300 is permanently installed in a space adjacent to the landing on the lowest floor for the convenience of the maintenance technician. In this embodiment, the electric emergency stop device 100 operated by the non-contact position detection device 200 and the ropeless governor system described above can reduce the amount of equipment installed in the tower along the height direction of the elevator shaft, such as a shielding plate for position measurement and a rope-type governor system, in the space between the side surface of the car 4 and the elevator shaft wall when the car door is the front. This makes it possible to secure a space in the elevator shaft 1 for permanently installing a dedicated maintenance device, which is a pit ladder in this embodiment.

[0019] As shown in FIG. 2, the devices in the hoistway are arranged in spaces (SP1 to SP5) between the car 4 and the hoistway wall surface (see the two-dot chain line in FIG. 2).

[0020] The spaces SP1 and SP2 are spaces between one of the left and right side surfaces in the depth direction of the car 4, i.e., in this embodiment, the left side surface facing the car door 80, and the car wall surface 1A adjacent to and parallel to the one side surface, as viewed from above the car shaft. Also, the spaces SP1 and SP2 are located on the car door 80 side and the opposite side of the car guide rail 2A, respectively, as viewed from above the car shaft.

[0021] The spaces SP3 and SP4 are the spaces between the other of the left and right side surfaces in the depth direction of the car 4, that is, in this embodiment, the right side surface facing the car door 80, and the car wall surface 1B adjacent to and parallel to the other side surface, as viewed from above the car shaft. Also, the spaces SP4 and SP3 are located on the car door 80 side and the opposite side of the car guide rail 2B, respectively, as viewed from above the car shaft.

[0022] The space SP5 is a space between the rear surface of the car 4 facing the car door 80 when viewed from above the hoistway and the hoistway wall surface 1C adjacent to and parallel to this rear surface.

[0023] As shown in Fig. 2, the hoist 3 and the counterweight 50 are located in the space SP2. In this embodiment, a thin hoist is applied as the hoist 3 so that the hoist 3 can be provided in such a narrow space. The counterweight 50 is located below the hoist 3 in the space SP2. The hoist 3 and the counterweight 50 are arranged in the space SP2 so as to overlap each other when viewed from above the hoistway.

[0024] In the space SP2, one end of the main rope 40 (FIG. 1) is fixed to the machine beam 3B (FIG. 1). The main rope 40 (FIG. 1) is wound around the pulley 50A (FIG. 1), the sheave 3A and the car under pulley 4B in the space SP2, and then passes under the car 4 and is wound around the car under pulley 4A. The main rope 40 wound around the car under pulley 4A extends upward in the space SP3. The other end of the main rope 40 extending upward is fixed to a main rope fixing member (not shown) that is fixed to the hoistway wall surface 1B, or the car guide rail 2B, or the rail bracket 20, near the top of the hoistway 1 in the space SP3.

[0025] The control panel 30 is disposed in the space SP1. The control panel 30 is fixed to a hoistway wall surface 1A near the top of the hoistway 1. This reduces the length of wiring between the hoisting machine 3 and the control panel 30. In this embodiment, the control panel 30 is made thin. This allows the control panel 30 to be disposed in the narrow space SP1.

[0026] In addition, since both the control panels 30 and the hoisting machine 3 can be disposed near the top of the elevator 1, when a maintenance technician performs maintenance work on the car 4, the technician can perform the maintenance work on the hoisting machine 3 and each control panel 30 without moving the car 4. This improves the efficiency of the maintenance work.

[0027] When the electric motor of the hoisting machine 3 is rotated by a driving device stored in a control panel 30 in the space SP1, the sheave 3A mechanically connected to the electric motor rotates. When the main rope 40 wound around the sheave 3A is frictionally driven by the rotation of the sheave 3A, the car 4 and the counterweight 50 move in opposite directions to each other in the hoistway 1. At this time, the car 4 is guided by a pair of car guide rails 2A, 2B fixed in the hoistway 1. In addition, the counterweight 50 is guided by a pair of counterweight guide rails 2C, 2D fixed in the hoistway 1.

[0028] The car guide rails 2A, 2B are supported by rail brackets 20 fixed to the hoistway walls 1A, 1B, respectively. The counterweight guide rails 2C, 2D are supported by rail brackets 20 fixed to the hoistway walls 1A, 1C, respectively.

[0029] The moving part 200A of the non-contact position device 200 is provided below the threshold for the car door 80. The fixed part 200B of the non-contact position device 200 is provided below the threshold for the landing door (not shown). Therefore, the non-contact position detection device 200 composed of the moving part 200A and the fixed part 200B does not affect the size of the spaces SP1 to SP5.

[0030] A non-contact speed detector 60 and a safety control device 70 that receives a signal output from the non-contact speed detector 60 are provided on the upper portion of the car 4. In this embodiment, the non-contact speed detector 60 and the safety control device 70 constitute a ropeless governor system.

[0031] In this embodiment, an image sensor is used as the non-contact speed detector 60. The safety control device 70 measures the lifting and lowering speed of the car 4 based on a surface image of the car guide rail 2A acquired by the non-contact speed detector 60 (image sensor). When the safety control device 70 determines that the measured lifting and lowering speed has reached a first overspeed (for example, a speed not exceeding 1.3 times the rated speed), it outputs a command signal to cut off the power supply of the hoist and the power supply of the control device that controls the hoist. When the safety control device 70 determines that the measured descent speed has reached a second overspeed (for example, a speed not exceeding 1.4 times the rated speed), it outputs a command signal to operate the electric emergency stop device 100. When the electric emergency stop device 100 is operated, each of the car guide rails 2A and 2B is clamped by a pair of brakes 151, thereby bringing the car 4 to an emergency stop.

[0032] In this embodiment, as described above, the non-contact type position detection device 200 composed of the moving part 200A and the fixed part 200B, and the electric emergency stop device 100 operated by a ropeless governor system having the non-contact type speed detector 60 are used, thereby making it possible to reduce the amount of equipment inside the tower.

[0033] This makes it possible to secure a space in the hoistway 1 that is less occupied by equipment, such as the space SP3 shown in Fig. 2. This makes it possible to reduce the area of ​​the hoistway 1. Also, it is possible to secure a space in which dedicated maintenance equipment can be permanently installed, such as the space SP4 shown in Fig. 2.

[0034] In this embodiment, a tail cord support member 601 that supports a tail cord 600 is fixed to the hoistway wall surface 1B in the space SP3. Also, in the space SP4, a pit ladder 300 is permanently installed near the bottom.

[0035] In this embodiment, the hoist 3, the counterweight 50, and the control panel 30 are provided in one (left) space (SP1 and SP2) of the spaces on both the left and right sides facing the car door 80. This leaves room for reduction in the entire other (right) space (SP3 and SP4). This allows the area of ​​the hoistway 1 to be reliably reduced. Also, a space in which dedicated maintenance equipment (pit ladder 300) can be permanently installed can be reliably secured. In this embodiment, the pit ladder 300 is permanently installed in space SP4, which is adjacent to the landing and closer to the landing than space SP3, out of spaces SP3 and SP4. This improves the convenience of the maintenance workers, thereby improving the efficiency of maintenance work in the pit.

[0036] Next, a configuration example of the electric safety device 100 will be described with reference to FIGS.

[0037] FIG. 3 is a front view of the car 4 and the electric safety device 100, showing an example of a schematic configuration of the electric safety device 100 in this embodiment.

[0038] The electric operator 103 is an electromagnetic operator in this embodiment, and is disposed on the upper part of the car 4. The electric operator 103 includes, for example, a movable piece or a movable rod that is driven by a solenoid or an electromagnet.

[0039] When the car 4 reaches a predetermined overspeed state (the "second overspeed" mentioned above), the electric operator 103 operates in response to a command signal from the safety control device 70 (Figure 2) in the ropeless governor system, displacing the link mechanism 104 and putting the brake 151 into a braking state.

[0040] In FIG. 3, a guide member for guiding the brake shoe 151 and an elastic body (such as a spring) for pressing the brake shoe 151 and the guide portion are omitted.

[0041] Link mechanism 104 has link shaft 140 driven by electric operator 103 and lifting rod 141 linked to link shaft 140 so as to be interlocked with link shaft 140, and lifting rod 141 is lifted in response to operation of electric operator 103. As a result, when brake shoe 151 attached to lifting rod 141 is lifted, brake shoe 151 clamps car guide rails ("2A, 2B" in FIG. 2).

[0042] FIG. 4 is a front view of the car 4 and the electric safety device 100, showing another example of the schematic configuration of the electric safety device 100 in this embodiment.

[0043] 4, the electric operating device 103 is disposed under the car 4. The configuration and operation of the electric safety device 100 are similar to those in the example of FIG.

[0044] Next, the speed detection means in the safety control device 70 (FIG. 2) constituting the ropeless governor system of this embodiment will be described with reference to FIG.

[0045] FIG. 5 is a schematic diagram showing an example of an image of the exposed surface of the car guide rail 2A (FIG. 2).

[0046] FIG. 5 shows an image I(t) at time t and an image I(t+Δt) at time t+Δt (Δt: frame period) acquired by a non-contact speed detector 60 (image sensor) (FIGS. 1 and 2). Both are images of the exposed surface of the steel material constituting the guide rail 2A, and show a brightness distribution pattern that indicates the unevenness distribution on the exposed surface of the steel material. Note that the car 4 descends between time t and time t+Δt.

[0047] Since the car 4 is moving, an image shift d occurs between the image I(t) and the image I(t+Δt) as shown in FIG. 5. In FIG. 5, since the car 4 is descending, an image shift d occurs in the upward direction in the image frame. In this embodiment, this image shift d is calculated by comparing the image I(t) and the image I(t+Δt) using an image correlation method. In this case, the image I(t) or a part of it is moved by a predetermined amount in the longitudinal direction of the guide rail 2A in the image frame, and the correlation function value between the moved image I(t) and the image I(t+Δt) is calculated. The total movement amount of the image I(t) when the correlation function value is maximum is regarded as the image shift d.

[0048] The image shift d corresponds to the amount of movement of the car 4 in time Δt (the amount of descent in FIG. 5). Therefore, the speed v of the car can be measured from the image shift d and time Δt (v=d / Δt).

[0049] Moreover, the direction in which the image shifts in the image frame indicates the moving direction (upward or downward) of the car 4. Therefore, if the positive or negative value of the image shift is set according to the direction in which the image shifts, for example, if the downward direction (upward direction) is positive and the upward direction (downward direction) is negative, the image shift d can be calculated for each Δt and integrated with the car position at the time of start-up, and the car position at the current time can be measured.

[0050] In addition, the car guide rail is preferably surface-finished by polishing or the like to create an uneven surface. In addition, the non-contact speed detector 60 (image sensor) is preferably equipped with a light source that illuminates the surface of the car guide rail 2A. This improves the measurement accuracy of the car position.

[0051] Next, a configuration example of the non-contact type position detection device 200 (FIGS. 1 and 2) will be described with reference to FIG. 6 and FIG.

[0052] Fig. 6 is a side view of a part of the car 4 and a part of the landing, showing an example of a schematic configuration of the non-contact type position detection device 200 in this embodiment. In Fig. 6, the car 4 has landed on the floor and is stopped.

[0053] 6, the moving part 200A of the non-contact position detection device 200 is fixed to a lower part of a threshold 81 for a car door 80 provided on the car 4. In addition, the fixed part 200B of the non-contact position detection device 200 is fixed to a lower part of a threshold 91 for a hall door 90 provided on the hall 400.

[0054] 6, either a photoelectric sensor (light emitting unit) or a magnetic sensor is applied as the moving unit 200A. When the moving unit 200A is a photoelectric sensor (light emitting unit) or a magnetic sensor, a photoelectric sensor (light receiving unit) and a magnet are applied as the fixed unit 200B, respectively.

[0055] Fig. 7 is a side view of a part of the car 4 and a part of the landing, showing another example of the schematic configuration of the non-contact type position detection device 200 in this embodiment. In Fig. 7, the car 4 has landed on the floor and is stopped.

[0056] 7, the moving part 200A of the non-contact position detection device 200 is fixed to a lower part of a threshold 81 for a car door 80 provided on the car 4 via a support part 201. In addition, the fixed part 200B of the non-contact position detection device 200 is formed of a plate-shaped member, and is fixed to a lower part of a threshold 91 for a hall door 90 provided on the hall 400.

[0057] In the example of Fig. 7, the moving part 200A is a photoelectric sensor (light receiving and emitting part), an induction type displacement sensor or proximity sensor, or a capacitance type displacement sensor or proximity sensor. When the moving part 200A is a photoelectric sensor (light receiving and emitting part), a reflector is used as the fixed part 200B. When the moving part 200A is an induction type displacement sensor or proximity sensor, a magnetic plate is used as the fixed part 200B. When the moving part 200A is a capacitance type displacement sensor or proximity sensor, a conductive plate is used as the fixed part 200B.

[0058] According to the above embodiment, the equipment in the tower arranged in the hoistway is reduced by the non-contact type position detection device 200 provided adjacent to the threshold for the car door and the threshold for the landing door, and the electric emergency stop device 100 operated by the ropeless governor system equipped with the non-contact type speed detector 60. Furthermore, in the hoistway 1, among the spaces SP1 and SP2 located on both sides of the car guide rail 2A and the spaces SP3 and SP4 located on both sides of the car guide rail 2B, the hoisting machine 3 and the counterweight 50 are arranged in one space (space SP2 in FIG. 2), and the control panel is arranged in the other space (space SP1 in FIG. 2). As a result, there is room for reduction in the remaining spaces (spaces SP3 and SP4 in FIG. 2), and it becomes possible to permanently install dedicated maintenance equipment (pit ladder 300 in FIG. 2).

[0059] The present invention is not limited to the above-mentioned embodiment, and various modifications are included. For example, the above-mentioned embodiment has been described in detail to easily explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. In addition, some of the configurations of the embodiment can be deleted, other configurations can be added, or other configurations can be replaced.

[0060] For example, the control panel 30 may be arranged to be divided into a space SP1 and a space SP5. [Explanation of symbols]

[0061] 1 elevator shaft, 1A, 1B, 1C elevator shaft wall, 2A, 2B car guide rail, 2C, 2D counterweight guide rail, 3 hoist, 3A sheave, 3B machine beam, 4 elevator car, 4A, 4B car under pulley, 20 rail bracket, 30 control panel, 40 main rope, 50 counterweight, 50A pulley, 60 non-contact speed detector, 70 safety control device, 80 car door, 81 threshold, 90 landing door, 91 threshold, 100 electric emergency stop device, 103 electric operator, 104 link mechanism, 140 link shaft, 141 lifting rod, 151 brake, 200 non-contact position detector, 200A moving part, 200B fixed part, 300 pit ladder, 400 Landing, 600 tail cord, 601 tail cord support member

Claims

1. In an elevator in which a hoist and a control panel are provided in a hoistway, A non-contact type position detection device that detects a position of a car and is provided adjacent to a car door threshold and a landing door threshold; An electric emergency stop device operated by a ropeless governor system equipped with a non-contact type speed detector; Equipped with The elevator includes a first space and a second space located on both sides of a first guide rail that guides the car, and a third space and a fourth space located on both sides of a second guide rail that guides the car, The control panel is provided in one of the first space, the second space, the third space, and the fourth space, and the hoist and the counterweight are provided in the other space, An elevator, characterized in that dedicated maintenance equipment is permanently installed in a space other than the one space and the other one space among the first space, the second space, the third space, and the fourth space.

2. In the elevator according to claim 1, An elevator characterized in that the control panel is provided in the first space, and the hoist and the counterweight are provided in the second space.

3. In an elevator in which a hoist and a control panel are provided in a hoistway, A non-contact type position detection device that detects a position of a car and is provided adjacent to a car door threshold and a landing door threshold; An electric emergency stop device operated by a ropeless governor system equipped with a non-contact type speed detector; Equipped with The elevator includes a first space and a second space located on both sides of a first guide rail that guides the car, and a third space and a fourth space located on both sides of a second guide rail that guides the car, The control panel is provided in one of the first space, the second space, the third space, and the fourth space, and the hoist and the counterweight are provided in the other space, The control panel is provided in the first space, and the hoist and the counterweight are provided in the second space, An elevator characterized in that dedicated maintenance equipment is permanently installed in the fourth space.

4. In the elevator according to claim 3, An elevator characterized in that the dedicated maintenance equipment is a pit ladder provided near the bottom of the elevator shaft.

5. In the elevator according to claim 4, The fourth space is closer to a landing than the third space.

6. In the elevator according to claim 1, The counterweight is located below the hoist, An elevator, characterized in that the hoist and the counterweight are arranged so as to overlap each other when viewed from above the hoistway.

7. In the elevator according to claim 1, An elevator characterized in that the control panel and the hoist are provided near the top of the hoistway.

Images