Car upper handrail device for elevator

Abstract

To provide a car upper handrail device for elevator that is able to improve the accuracy of the detection of a worker leaning out from a car upper handrail.SOLUTION: A car upper handrail device for elevator 2 includes: a car upper handrail 201 provided on a car 1; and an external-force detection device 202 that detects the car upper handrail 201 being pressed downward. The car upper handrail 201 includes: a handrail support portion 203 provided on an upper frame 104 of the car 1; and a handrail body 204 provided on the handrail support portion 203. As viewed from above, the handrail support portion 203 extends in a direction intersecting a direction along the upper frame 104. The handrail body 204 is separated from the upper frame 104, and the external-force detection device 202 detects the handrail body 204 being pressed downward.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to an elevator car handrail device. [Background technology]

[0002] Conventionally, there is known an elevator car handrail device that includes a car handrail provided on the car and an external force detection device that detects when an operator leans out over the car handrail (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-222452 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration of the elevator car handrail device described in Patent Document 1, the external force detection device detects that the car handrail is being pushed horizontally by the worker. As a result, when the car handrail is pushed downward by the worker without being pushed horizontally, the external force detection device cannot detect that the worker is leaning out from the car handrail. Therefore, there is a problem in that the accuracy of detecting that the worker is leaning out from the car handrail is low.

[0005] The present disclosure has been made to solve the problems described above, and has an objective to provide an elevator car handrail device that can improve the accuracy of detecting when an operator leans out over the car handrail. [Means for solving the problem]

[0006] The elevator car handrail device according to the present disclosure includes a car handrail provided on the car, and an external force detection device that detects when the car handrail is being pushed downward. Effect of the Invention

[0007] Advantageous Effects of Invention According to the elevator car handrail device according to the present disclosure, it is possible to improve the accuracy of detecting whether an operator is leaning out over the car handrail. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an elevator car handrail device in accordance with a first embodiment. [Diagram 2] FIG. 2 is a plan view showing the car handrail device of the elevator in FIG. 1. [Diagram 3] FIG. 2 is a front view showing the car handrail device of the elevator of FIG. 1. [Figure 4] FIG. 11 is a front view showing an elevator car handrail device according to a second embodiment. [Diagram 5] 5 is a front view showing the external force detection device of FIG. 4. [Figure 6] FIG. 11 is a front view showing an elevator car handrail device according to a third embodiment. [Figure 7] FIG. 11 is a front view showing an elevator car handrail device according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Embodiment 1 Fig. 1 is a perspective view showing an elevator car handrail device according to embodiment 1. Fig. 2 is a plan view showing the car handrail device of the elevator of Fig. 1. Fig. 3 is a front view showing the car handrail device of the elevator of Fig. 1. The elevator comprises a car 1 and a car handrail device 2.

[0010] The car 1 includes a car body 101 and a car frame 102. Elevator users enter and exit the car body 101. The car frame 102 supports the car body 101. The car frame 102 includes a lower frame (not shown), a pair of vertical frames 103, and an upper frame 104.

[0011] The lower frame is arranged to extend along a horizontal plane. The car body 101 is placed on the lower frame. Each of the pair of vertical frames 103 is arranged to extend in the height direction. The pair of vertical frames 103 are arranged parallel to each other. One of the pair of vertical frames 103 is erected at one end of the lower frame in the longitudinal direction. The other of the pair of vertical frames 103 is erected at the other end of the lower frame in the longitudinal direction.

[0012] The car body 101 is sandwiched between a pair of vertical frames 103. The upper frame 104 is disposed above the car body 101. The upper frame 104 is provided across the upper ends of the pair of vertical frames 103. A main rope (not shown) is connected to the upper frame 104. The car 1 is suspended from the hoistway via the main rope.

[0013] The car handrail device 2 includes a car handrail 201 provided on the car 1, and an external force detection device 202 that detects when the car handrail 201 is being pushed downward.

[0014] The car handrail 201 has a pair of handrail support parts 203 provided on the upper frame 104 of the car 1, and a handrail main body 204 provided across the pair of handrail support parts 203. When an operator 3 leans out from the car handrail 201, the handrail main body 204 is pushed downward by the operator 3.

[0015] Each of the pair of handrail support parts 203 extends in a direction intersecting the direction along the upper frame 104 when viewed from above. Specifically, each of the handrail support parts 203 extends so as to be perpendicular to the direction along the upper frame 104 when viewed from above. The pair of handrail support parts 203 are arranged parallel to each other. Furthermore, the pair of handrail support parts 203 are arranged along a horizontal plane.

[0016] One longitudinal end 205 of each handrail support part 203 is fixed to the upper frame 104. A handrail main body 204 is provided across the other longitudinal end 206 of each handrail support part 203. Therefore, the handrail main body 204 is horizontally spaced apart from the upper frame 104. The handrail main body 204 is disposed along the upper frame 104.

[0017] The external force detection device 202 detects that the handrail main body 204 is being pressed downward. The external force detection device 202 has a deflection measurement unit 207 and a determination unit 208.

[0018] The deflection measuring unit 207 is provided on the handrail support part 203. The deflection measuring unit 207 is composed of a strain gauge. The deflection measuring unit 207 measures the deflection of the handrail support part 203 that occurs when the handrail main body 204 is pressed downward.

[0019] The determination unit 208 is composed of an on-car station. The determination unit 208 is electrically connected to the deflection measurement unit 207. The measurement results of the deflection measurement unit 207 are input to the determination unit 208. The determination unit 208 determines whether or not the handrail main body 204 is being pushed downward based on the measurement results of the deflection measurement unit 207.

[0020] A threshold value for determining whether or not the handrail main body 204 is being pushed downward is set in advance in the determination unit 208. The determination unit 208 compares the measurement result of the deflection measurement unit 207 with the preset threshold value to determine whether or not the handrail main body 204 is being pushed downward.

[0021] Specifically, when the measurement result of the deflection measuring unit 207 is equal to or less than a preset threshold, the determining unit 208 determines that the handrail main body 204 is not being pushed downward. On the other hand, when the measurement result of the deflection measuring unit 207 is greater than the preset threshold, the determining unit 208 determines that the handrail main body 204 is being pushed downward.

[0022] The result of the determination by the determination unit 208 is input to an elevator control panel (not shown). The elevator control panel controls the movement of the car 1 based on the result of the determination by the determination unit 208.

[0023] Specifically, as for the control of the movement of the car 1, when the determination unit 208 determines that the handrail main body 204 is not being pushed downward, the elevator control panel allows the movement of the car 1. On the other hand, when the determination unit 208 determines that the handrail main body 204 is being pushed downward, the elevator control panel restricts the movement of the car 1.

[0024] Specifically, as a restriction on the movement of car 1, when car 1 is moving, the elevator control panel decelerates car 1 to stop car 1. When car 1 is stopped, the elevator control panel disables car 1 from moving.

[0025] As described above, the elevator car handrail device 2 according to the first embodiment includes the car handrail 201 provided on the car 1, and the external force detection device 202 that detects that the car handrail 201 is being pushed downward. According to this configuration, the external force detection device 202 detects that the car handrail 201 is being pushed downward. When the worker 3 leans out from the car handrail 201, the car handrail 201 is pushed downward. As a result, even when the car handrail 201 is pushed downward by the worker 3 without being pushed horizontally, it is possible to detect that the worker 3 is leaning out from the car handrail 201. Therefore, it is possible to improve the accuracy of detecting that the worker 3 is leaning out from the car handrail 201.

[0026] In addition, in the elevator car handrail device 2 according to the first embodiment, the car handrail 201 has a handrail support part 203 provided on the upper frame 104 of the car 1, and a handrail main body 204 provided on the handrail support part 203. The handrail support part 203 extends in a direction intersecting with the direction along the upper frame 104 when viewed from above. The handrail main body 204 is separated from the upper frame 104. The external force detection device 202 detects that the handrail main body 204 is being pushed downward. According to this configuration, when the worker 3 is pushing the handrail main body 204 downward, the handrail support part 203 is largely deflected and deformed. This allows the external force detection device 202 to more accurately detect that the handrail main body 204 is being pushed downward.

[0027] Moreover, in the elevator car handrail device 2 according to the first embodiment, the external force detection device 202 has a deflection measurement unit 207 and a determination unit 208. The deflection measurement unit 207 is provided in the handrail support unit 203. The determination unit 208 determines whether or not the handrail main body 204 is being pushed downward based on the measurement result of the deflection measurement unit 207. According to this configuration, the deflection measurement unit 207 measures the deflection deformation of the handrail support unit 203, and the determination unit 208 determines whether or not the handrail main body 204 is being pushed downward based on the measurement result of the deflection measurement unit 207. This makes it possible to detect, with a simple configuration, that the car handrail 201 is being pushed downward.

[0028] In the elevator car handrail device 2 according to the first embodiment, the determination unit 208 is configured from an on-car station. However, this is not limited to this. The determination unit 208 may be configured from, for example, an elevator control panel.

[0029] Embodiment 2 Fig. 4 is a front view showing an elevator car handrail device 2 according to embodiment 2. Fig. 5 is a front view showing external force detection device 202 of Fig. 4. In elevator car handrail device 2 according to embodiment 2, external force detection device 202 has a switch unit 209 and a determination unit 210.

[0030] The switch unit 209 is provided below the handrail support unit 203. The switch unit 209 is attached to the upper frame 104. The switch unit 209 is composed of a microswitch.

[0031] The switch unit 209 is disposed so that when the handrail main body 204 is pressed downward, the handrail support part 203 presses the switch unit 209 downward. The switch unit 209 detects that it is being pressed downward by the handrail support part 203.

[0032] The part of the handrail support part 203 that presses the switch part 209 is the part of the handrail support part 203 that is far from the upper frame 104 in the longitudinal direction of the handrail support part 203. In Fig. 4, the longitudinal middle part of the handrail support part 203 is the part that presses the switch part 209. Note that the other longitudinal end part 206 of the handrail support part 203, i.e., the end part of the handrail support part 203 on the handrail main body 204 side, may be the part that presses the switch part 209.

[0033] The determination unit 210 is composed of an on-car station. The determination unit 210 is electrically connected to the switch unit 209. The detection result of the switch unit 209 is input to the determination unit 210. Based on the detection result of the switch unit 209, the determination unit 210 determines whether or not the handrail main body 204 is being pushed downward.

[0034] Specifically, when the switch unit 209 is not pressing the handrail support unit 203 downward, the determination unit 210 determines that the handrail main body 204 is not pressed downward. On the other hand, when the switch unit 209 is pressing the handrail support unit 203 downward, the determination unit 210 determines that the handrail main body 204 is pressed downward.

[0035] The determination result of the determination unit 210 is input to an elevator control panel. The elevator control panel controls the movement of the car 1 based on the determination result of the determination unit 210.

[0036] Moreover, in the elevator car handrail device 2 according to the second embodiment, the handrail support part 203 is fixed to the upper frame 104 via the double nut 211 and the bolt 212. The use of the double nut 211 and the bolt 212 prevents the handrail support part 203 from being loosened from the upper frame 104. This makes it possible to prevent erroneous detection by the switch part 209.

[0037] Other configurations of the elevator car handrail device 2 according to the second embodiment are similar to those of the elevator car handrail device 2 according to the first embodiment.

[0038] As described above, in the elevator car handrail device 2 according to the second embodiment, the external force detection device 202 has the switch unit 209 and the determination unit 210. The switch unit 209 is provided below the handrail support unit 203. The switch unit 209 detects that it is being pushed downward by the handrail support unit 203. The determination unit 210 determines whether or not the handrail main body 204 is being pushed downward based on the detection result of the switch unit 209. According to this configuration, the switch unit 209 detects that it is being pushed downward by the handrail support unit 203, and the determination unit 210 determines whether or not the handrail main body 204 is being pushed downward based on the detection result of the switch unit 209. This makes it possible to detect that the car handrail 201 is being pushed downward with a simple configuration.

[0039] In the elevator car handrail device 2 according to the second embodiment, the determination unit 210 is configured from an on-car station. However, this is not limited to this. The determination unit 210 may be configured from, for example, an elevator control panel.

[0040] Embodiment 3 6 is a front view showing an elevator car handrail device 2 according to embodiment 3. In elevator car handrail device 2 according to embodiment 3, car handrail 201 has elastic member 213.

[0041] The elastic member 213 is provided between the upper frame 104 and the handrail support part 203. The handrail support part 203 is supported by the upper frame 104 via the elastic member 213. When the handrail main body 204 is pressed downward, the handrail support part 203 is flexed and deformed, and is tilted relative to the horizontal plane due to the elastic deformation of the elastic member 213.

[0042] The handrail support part 203 is attached to the upper frame 104 via nuts 214 and bolts 215.

[0043] Other configurations of the elevator car handrail device 2 according to the third embodiment are similar to those of the elevator car handrail device 2 according to the second embodiment.

[0044] As described above, in the elevator car handrail device 2 according to the third embodiment, the car handrail 201 has an elastic member 213 provided between the upper frame 104 and the handrail support part 203. The handrail support part 203 is supported by the upper frame 104 via the elastic member 213. With this configuration, when the worker 3 leans out over the handrail main body 204, the handrail support part 203 flexes and deforms, and tilts with respect to the horizontal plane. This makes it easier for the handrail support part 203 to press the switch part 209 downward. Therefore, the detection accuracy of the external force detection device 202 can be improved.

[0045] Embodiment 4 7 is a front view showing an elevator car handrail device 2 according to embodiment 4. In elevator car handrail device 2 according to embodiment 4, external force detection device 202 has a light-emitting unit 216, a light-receiving unit 217, and a determination unit 218. Light-emitting unit 216 emits light. Light-receiving unit 217 detects the light emitted from light-emitting unit 216.

[0046] The light emitting unit 216 is provided in a first portion 219, which is the portion of the handrail support part 203 on the upper frame 104 side. The light receiving unit 217 is provided in a second portion 220, which is the portion of the handrail support part 203 opposite to the first portion 219.

[0047] The light receiving unit 217 is provided in the second part 220 so that it is hit by the light emitted from the light emitting unit 216 when the handrail main body 204 is not pushed downward, and is not hit by the light emitted from the light emitting unit 216 when the handrail main body 204 is pushed downward.

[0048] The determination unit 218 is composed of an on-car station. The determination unit 218 is electrically connected to the light receiving unit 217. The detection result of the light receiving unit 217 is input to the determination unit 218. Based on the detection result of the light receiving unit 217, the determination unit 218 determines whether or not the handrail main body 204 is being pushed downward.

[0049] Specifically, when the light emitted from the light-emitting unit 216 hits the light-receiving unit 217, the determination unit 218 determines that the handrail main body 204 is not being pushed downward. On the other hand, when the light emitted from the light-emitting unit 216 does not hit the light-receiving unit 217, the determination unit 218 determines that the handrail main body 204 is being pushed downward.

[0050] The determination result of the determination unit 218 is input to the elevator control panel. The elevator control panel controls the movement of the car 1 based on the determination result of the determination unit 218.

[0051] Other configurations of the elevator car handrail device 2 according to embodiment 4 are similar to those of the elevator car handrail device 2 according to embodiment 1. Note that, like the elevator car handrail device 2 according to embodiment 3, the car handrail 201 may be configured to have an elastic member 213 provided between the upper frame 104 and the handrail support part 203.

[0052] As described above, in the elevator car handrail device 2 according to the third embodiment, the external force detection device 202 has the light emitting unit 216, the light receiving unit 217, and the determination unit 218. The light emitting unit 216 is provided in the first portion 219 of the handrail support portion 203. The light emitting unit 216 emits light. The light receiving unit 217 is provided in the second portion 220 of the handrail support portion 203. The light receiving unit 217 detects the light emitted from the light emitting unit 216. The determination unit 218 determines whether the handrail main body 204 is being pushed downward or not based on the detection result of the light receiving unit 217. The light receiving unit 217 is provided in the second portion 220 so that the light emitted from the light emitting unit 216 hits the light receiving unit 217 when the handrail main body 204 is not being pushed downward, and the light emitted from the light emitting unit 216 does not hit the light receiving unit 217 when the handrail main body 204 is being pushed downward. According to this configuration, it is possible to detect, with a simple configuration, that the car handrail 201 is being pushed downward.

[0053] In the elevator car handrail device 2 according to the third embodiment, a configuration has been described in which the light-emitting unit 216 is provided in the first portion 219, and the light-receiving unit 217 is provided in the second portion 220. However, this is not limited to this. A configuration in which the light-receiving unit 217 is provided in the first portion 219, and the light-emitting unit 216 is provided in the second portion 220 may also be used.

[0054] In addition, in the elevator car handrail device 2 according to the second embodiment, the configuration in which the determination unit 218 is configured from an on-car station has been described. However, this is not limited to this. The determination unit 218 may be configured from, for example, an elevator control panel.

[0055] Although the elevator car handrail device 2 according to each preferred embodiment has been described above, the elevator car handrail device 2 according to each of the above-mentioned embodiments is not limited to the above-mentioned embodiments. Various modifications and conversions can be made to the elevator car handrail device 2 according to each of the above-mentioned embodiments without departing from the scope of the claims. [Explanation of symbols]

[0056] REFERENCE SIGNS LIST 1 car, 2 car handrail device, 3 operator, 101 car body, 102 car frame, 103 vertical frame, 104 upper frame, 201 car handrail, 202 external force detection device, 203 handrail support section, 204 handrail body, 205 one longitudinal end section, 206 other longitudinal end section, 207 deflection measurement section, 208 judgment section, 209 switch section, 210 judgment section, 211 double nut, 212 bolt, 213 elastic member, 214 nut, 215 bolt, 216 light emitting section, 217 light receiving section, 218 judgment section, 219 first section, 220 second section.

Claims

1. A handrail on the car; an external force detection device that detects that the car handrail is being pushed downward; An elevator car handrail device equipped with:

2. The car handrail has a handrail support part provided on an upper frame of the car and a handrail main body provided on the handrail support part, The handrail support portion extends in a direction intersecting with a direction along the upper frame when viewed from above, The handrail body is separated from the upper frame, 2. The elevator car handrail device according to claim 1, wherein the external force detection device detects that the handrail body is being pushed downward.

3. The external force detection device is A deflection measuring unit provided on the handrail support portion; A determination unit that determines whether or not the handrail main body is being pushed downward based on the measurement result of the deflection measurement unit; 3. The elevator car handrail device according to claim 2, further comprising:

4. The external force detection device is A switch unit that is provided below the handrail support portion and detects that the handrail support portion is being pressed downward; A determination unit that determines whether or not the handrail main body is being pushed downward based on a detection result of the switch unit; 3. The elevator car handrail device according to claim 2, further comprising:

5. The car handrail has an elastic member provided between the upper frame and the handrail support portion, 5. The elevator car handrail device according to claim 4, wherein the handrail support portion is supported by the upper frame via the elastic member.

6. The external force detection device is A light-emitting unit that emits light and is provided in one of a first portion that is a portion of the handrail support portion on the upper frame side and a second portion that is a portion of the handrail support portion opposite to the first portion; a light receiving portion provided in the other of the first portion and the second portion, the light receiving portion detecting light emitted from the light emitting portion; A determination unit that determines whether the handrail main body is being pushed downward based on the detection result of the light receiving unit; Has 3. An elevator car handrail device according to claim 2, wherein the light receiving unit is provided on the other side so that it is struck by the light emitted from the light emitting unit when the handrail main body is not pushed downward, and is not struck by the light emitted from the light emitting unit when the handrail main body is pushed downward.

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