Elevator car and elevator

Abstract

Provided are an elevator car and an elevator capable of detecting a speed from a surface state of a guide rail and facilitating oiler inspection work and oil replenishment work. This elevator car includes a car body, a guide shoe, an oiler, an imaging unit, and a calculation unit. The guide shoe, the oiler, and the imaging unit are attached to the car body. The guide shoe slidably engages with a guide rail disposed in a hoistway. The oiler applies lubricating oil to the guide rail. The imaging unit images a surface of the guide rail. The calculation unit calculates a speed of the elevator car on the basis of an image captured by the imaging unit. The imaging unit is installed below the oiler.

Description

Cars and elevators

[0001] The present invention relates to a car and an elevator.

[0002] Conventionally, elevators have used mechanical governors and encoders to detect the distance and speed of car movement. Mechanical governors and encoders require the placement of long objects, such as governor ropes, within the hoistway. This requires space within the hoistway to accommodate such long objects, hindering the miniaturization of the hoistway. To address this issue, elevators have been developed that capture images of the surface of the guide rails and use the captured images to detect the distance and speed of car movement.

[0003] Patent Document 1 discloses an elevator that senses the relative speed of a car with respect to a guide rail. The elevator disclosed in Patent Document 1 includes a car and a speed detection device attached to the car. The speed detection device includes a detection unit and a calculation unit. The detection unit detects images of the surface condition of a pair of guide rails laid opposite each other in a hoistway along the car's travel path. The calculation unit calculates the car speed from the image difference of the guide rail surfaces detected by the detection unit.

[0004] International Publication No. 2020 / 008696

[0005] Some elevator cars are equipped with guide shoes that slidably engage with guide rails and oilers that apply lubricating oil to the guide rails. The guide shoes and oilers are located at the corners of the elevator car. Therefore, a detector such as that described in Patent Document 1 would interfere with the inspection and refilling of the oiler.

[0006] Taking the above problems into consideration, the present invention aims to provide a car and elevator that can detect speed from the surface condition of the guide rail and that can facilitate oiler inspection and oil replenishment.

[0007] In order to solve the above problems and achieve the object, a car embodying one aspect of the present invention comprises a car body, a guide shoe, an oiler, an imaging unit, and a calculation unit. The guide shoe, oiler, and imaging unit are attached to the car body. The guide shoe slidably engages with a guide rail arranged in the hoistway. The oiler applies lubricating oil to the guide rail. The imaging unit images the surface of the guide rail. The calculation unit calculates the speed of the car based on the image captured by the imaging unit. The imaging unit is installed below the oiler. Also, an elevator embodying one aspect of the present invention comprises the above-mentioned car that rises and falls in the hoistway, and a guide rail that is arranged in the hoistway and guides the car as it rises and falls.

[0008] According to the car and elevator having the above configuration, it is possible to detect the speed from the surface condition of the guide rail, which makes it easy to inspect the oiler and to replenish the oil.

[0009] Fig. 1 is a schematic diagram showing an elevator according to a first embodiment. Fig. 2 is a perspective view showing a car according to the first embodiment. Fig. 3 is a front view showing a car according to the first embodiment. Fig. 4 is an enlarged view of an upper corner of the car according to the first embodiment. Fig. 5 is a diagram explaining the path of lubricating oil scattered from an oiler of the car according to the first embodiment. Fig. 6 is a diagram explaining the path of lubricating oil scattered from an oiler of the car according to a second embodiment.

[0010] 1. First Embodiment A car and elevator according to a first embodiment will be described below with reference to Figures 1 to 5. Note that common members in each figure are denoted by the same reference numerals.

[0011] [Configuration of Elevator] First, the configuration of the elevator according to the first embodiment will be described with reference to Fig. 1. Fig. 1 is a schematic diagram showing an example of the configuration of the elevator according to the first embodiment.

[0012] As shown in Figure 1, elevator 1 is a so-called machine room-less elevator that does not have a machine room above a hoistway 100 formed within a building structure. Note that the elevator of the present invention is not limited to machine room-less elevators, and may also be an elevator that has a machine room above the hoistway 100.

[0013] The elevator 1 includes a car 110 that moves up and down in the elevator shaft 100, a hoist 120, a counterweight 130, a pair of guide rails 150 (see FIG. 2), and a rope 170.

[0014] The car 110 carries passengers and luggage. A lifting pulley 111 is provided at the bottom of the car 110. A rope 170 is wound around the lifting pulley 111. A weight-side pulley 131 is attached to the top of the counterweight 130. The rope 170 is wound around the weight-side pulley 131.

[0015] The hoisting machine 120 is disposed at the top of the hoistway 100. This prevents the hoisting machine 120 from being submerged even if the pit of the hoistway 100 is flooded. As a result, the elevator can continue to operate even if the pit of the hoistway 100 is flooded. A rope 170 is wound around the hoisting machine 120.

[0016] The hoist 120 is a device that winds up a rope 170 to raise and lower the car 110. The hoist 120 raises and lowers the car 110 and the counterweight 130 in a bucket-like manner via the rope 170. Hereinafter, the direction in which the car 110 and the counterweight 130 move up and down will be referred to as the up and down direction. The operation of the hoist 120 is controlled by a control unit provided in a control panel (not shown). The control panel (not shown) is located, for example, at the top of the hoistway 100.

[0017] A pair of guide rails 150 (see FIG. 2) are fixed to the wall surface of the hoistway 100. The pair of guide rails 150 extend in the vertical direction. The pair of guide rails 150 guide the elevator car 110 as it ascends and descends. A pair of weight guide rails (not shown) are attached to the wall surface of the hoistway 100. The pair of weight guide rails guide the counterweight 130 as it ascends and descends.

[0018] One end and the other end of the rope 170 are fixed to the top of the hoistway 100. The rope 170 is attached from the weight-side pulley 131 of the counterweight 130 to the hoisting machine 120 and wound around the lifting pulley 111 of the car 110. When the hoisting machine 120 is driven, the car 110 and the counterweight 130 move up and down in opposite directions within the hoistway 100.

[0019] [Configuration of Car] Next, the configuration of the car 110 will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a perspective view showing the car 110. Fig. 3 is a front view showing the car.

[0020] In this embodiment, the front-back, up-down, and left-right directions are defined based on the line of sight of the elevator user facing the car 110. In this case, the near side as seen from the elevator user is the front direction, the far side is the rear direction, the upper side is the upper side, the lower side is the lower side, the left side is the left side, and the right side is the right side.

[0021] As shown in Figures 2 and 3, the elevator car 110 includes a car body 2, a car door 3, a door opening / closing device 4, a car door sill 5, an apron 7, a plurality of guide shoes 8, two oilers 9, two speed detection devices 10, and a control device 11.

[0022] As shown in Figure 2, the car body 2 is formed in a hollow, approximately rectangular parallelepiped shape. An entrance / exit is formed in the front of the car body 2. People and objects enter and exit the car body 2 through the entrance / exit on the front. The car door 3 opens and closes the entrance / exit of the car body 2.

[0023] The door opening and closing device 4 is installed above the entrance of the car body 2. The car door sill 5 is attached below the entrance of the car body 2. The door opening and closing device 4 and the car door sill 5 support the car door 3 so that it can slide in the left-right direction. The door opening and closing device 4 has a door drive mechanism that slides the car door 3 in the left-right direction.

[0024] The apron 7 is attached to the car door sill 5. The apron 7 is a metal plate-shaped member having a flat surface that is approximately perpendicular to the front-to-rear direction. The length of the apron 7 in the left-to-right direction is set to be approximately the same as the overall width of the entrance formed when the car door 3 is fully opened. The apron 7 fills the gap that occurs between the car body 2 and the floor of the landing in the building structure.

[0025] 3, the plurality of guide shoes 8 include two upper guide shoes 8A and two lower guide shoes 8B. The two upper guide shoes 8A are fixed to the upper part of the car body 2 via mounting brackets (not shown). The two lower guide shoes 8B are fixed to the lower part of the car body 2 via mounting brackets (not shown).

[0026] The two upper guide shoes 8A and the two lower guide shoes 8B protrude in the left-right direction from the car body 2. The two upper guide shoes 8A and the two lower guide shoes 8B are slidably engaged with a pair of guide rails 150.

[0027] The two speed detection devices 10 are disposed above the two upper guide shoes 8A. The two speed detection devices 10 are fixed to the upper part of the car body 2 via brackets 21. The two speed detection devices 10 face the pair of guide rails 150 at a fixed distance in the left-right direction.

[0028] The two speed detection devices 10 capture images of the pair of guide rails 150 when the car 110 moves up and down, and detect the moving speed of the car 110. It is not necessary to provide two speed detection devices 10; at least one speed detection device will suffice. The two speed detection devices 10 send data on the moving speed of the car 110 to the control device 11.

[0029] The bracket 21 has a rising piece 21a and an installation base 21b. The rising piece 21a extends in the vertical direction. The lower part of the rising piece 21a is attached to the upper part of the car main body 2. The vertical length of the rising piece 21a is longer than the vertical length of the upper guide shoe 8A.

[0030] The installation base 21b is a plate having a plane that is approximately vertical. One of the planes, the lower surface, of the installation base 21b is fixed to the upper part of the rising piece 21a. The lower surface of the installation base 21b faces the upper guide shoe 8A at an appropriate distance in the vertical direction. The speed detection device 10 is installed on the other plane, the upper surface, of the installation base 21b.

[0031] The two oilers 9 are disposed above the two speed detection devices 10. The two oilers 9 are fixed to the bracket 21 via oiler supports 22. The two oilers 9 are slidably engaged with the pair of guide rails 150. The two oilers 9 apply lubricating oil to the pair of guide rails 150. This suppresses wear of the pair of guide rails 150 due to contact with the two upper guide shoes 8A and the two lower guide shoes 8B.

[0032] The control device 11 is fixed to the top of the car body 2. The control device 11 has a processing unit, a memory unit, a distance calculation unit, an abnormality determination unit, and a speed correction unit. The processing unit executes control related to the car 110. The memory unit stores the moving speed data of the car 110 calculated by the speed detection device 10. The distance calculation unit calculates the moving distance of the car 110 from the moving speed of the car 110. The abnormality determination unit executes abnormality determination of the car 110 in real time. The speed correction unit corrects the moving speed value of the car 110 output by the speed detection device 10.

[0033] [Configuration of Euler] Next, the configuration of the Euler 9 will be described with reference to Fig. 4. Fig. 4 is an enlarged view of the upper corner of the car 110.

[0034] 4, the oiler 9 has a case 9a, a lid 9b, and an oiler pad 9c. The case 9a and the lid 9b form a housing that houses the oiler pad 9c. The case 9a has a pad opening (not shown) that exposes a part of the oiler pad 9c.

[0035] A portion of the oiler pad 9c is exposed from the pad opening of the case 9a and comes into contact with the guide rail 150. The oiler pad 9c contains lubricating oil and applies the lubricating oil to the guide rail 150. When the amount of lubricating oil in the oiler pad 9c becomes low, it can no longer apply the lubricating oil to the guide rail 150. Therefore, the oiler pad 9c needs to be replaced periodically.

[0036] A maintenance worker removes the cover 9b from the case 9a and replaces the oiler pad 9c. At this time, since there are no obstacles above the oiler 9, the worker can easily replace the oiler pad 9c.

[0037] For example, if the speed detection device 10 is located above the oiler 9, it is necessary to remove the speed detection device 10 and then remove the cover 9b of the oiler 9, which makes the replacement of the oiler pad 9c cumbersome. Also, the speed detection device 10 needs to be positioned facing the guide rail 150 at a certain distance. This makes the positioning of the removed speed detection device 10 cumbersome. In this embodiment, the speed detection device 10 is located below the oiler 9, which eliminates the above-mentioned cumbersome work.

[0038] [Configuration of Speed ​​Detection Device] Next, the configuration of the speed detection device 10 will be described with reference to Fig. 4. As shown in Fig. 4, the speed detection device 10 has a case 13, an imaging unit 14, and a calculation unit 15.

[0039] The case 13 is formed in a flat, approximately rectangular parallelepiped shape. The case 13 is fixed to the upper part of the car body 2 via a bracket 21 (installation stand 21b). Therefore, the installation surface of the case 13 (speed detection device 10) is located above the ceiling work surface of the car body 2. This allows workers to easily perform inspection and maintenance work on the speed detection device 10.

[0040] One side of the case 13 in the left-right direction overlaps with the oiler 9 in the up-down direction. The other side of the case 13 in the left-right direction does not overlap with the oiler 9 in the up-down direction. The case 13 houses an imaging unit 14 and a calculation unit 15. The imaging unit 14 is arranged on one side of the case 13 in the left-right direction. The calculation unit 15 is arranged on the other side of the case 13 in the left-right direction.

[0041] One side surface 13a of the case 13 faces the guide rail 150. An image capture opening is formed in one side surface 13a of the case 13. The image capture opening exposes the light incident surface of the image capture unit 14. One side surface 13a of the case 13 is formed with a visor portion 13b. The visor portion 13b is located above the image capture opening. The visor portion 13b protrudes in the left-right direction from one side surface 13a of the case 13. The visor portion 13b is formed in the shape of a plate having a flat surface that is approximately perpendicular to the up-down direction.

[0042] An opening for the calculation unit is formed on the other left-right side of the upper part of the case 13. The opening for the calculation unit faces the calculation unit 15. A lid 13c is detachably attached to the upper part of the case 13. The lid 13c opens and closes the opening for the calculation unit. An operator performs maintenance, inspection, and replacement work on the calculation unit 15 through the opening for the calculation unit of the case 13.

[0043] The opening for the calculation unit of the case 13 does not overlap with the oiler 9 in the vertical direction. This allows an operator to easily attach and detach the lid 13c to and from the case 13. As a result, an operator can easily perform maintenance, inspection, and replacement work on the calculation unit 15.

[0044] The imaging unit 14 includes an illumination unit, a lens, and an imaging element. The illumination unit may use a light source such as an LED (Light Emitting Diode) or a laser diode. The lens focuses light reflected from the surface of the guide rail 150 onto the imaging element. The lens forms the light incident surface described above.

[0045] The imaging element periodically captures an image of the surface of the guide rail 150. The imaging element may be any element capable of converting the imaged light into an electrical signal, such as a charge coupled device (CCD) element or a complementary metal oxide semiconductor (CMOS) element. The imaging element sends image data of the captured image of the surface of the guide rail 150 to the calculation unit 15.

[0046] The calculation unit 15 is configured, for example, by a circuit board. The calculation unit 15 extracts feature points from image data of the surface of the guide rail 150. The calculation unit 15 stores the extracted feature point data in a memory unit of the speed detection device 10. The calculation unit 15 compares the stored past data with the newly acquired data. The calculation unit 15 calculates the moving speed of the car 110 from the movement amount of the feature points that appear after the comparison.

[0047] For example, the calculation unit 15 detects scratches on the guide rail 150 in the image of the range captured at time t as feature points. Next, the calculation unit 15 extracts the same scratches as feature points from the image captured at time t + Δt, compares the images, and calculates the travel distance. Thereafter, the calculation unit 15 calculates the travel speed of the car 110 from the travel distance and the time difference. The calculation unit 15 sends data on the calculated travel speed of the car 110 to the control device 11.

[0048] [Shielding of Scattered Lubricant] Next, shielding of the lubricant scattered from the oiler 9 will be described with reference to Fig. 5. Fig. 5 is a diagram illustrating the path of the lubricant scattered from the oiler 9.

[0049] 5, the canopy portion 13b blocks the lubricating oil leaking from the oiler 9 and heading toward the light incident surface of the imaging unit 14. The canopy portion 13b is set to a size that blocks the straight line connecting the contact point between the oiler 9 and the guide rail 150 and the light incident surface of the imaging unit 14. This allows the canopy portion 13b to reliably block the lubricating oil that scatters from the contact point between the oiler 9 and the guide rail 150 and heads toward the light incident surface of the imaging unit 14.

[0050] Therefore, the canopy portion 13b prevents the lubricating oil from adhering to the light incident surface of the imaging unit 14. This prevents the lubricating oil from entering the image captured by the imaging element of the imaging unit 14. As a result, the calculation unit 15 can extract feature points with high accuracy and calculate the moving speed of the car 110 with high accuracy.

[0051] Moreover, the eaves portion 13b is set to a size that blocks the straight line connecting the contact point between the oiler 9 and the guide rail 150 and the upper surface of the installation base 21b. As a result, the eaves portion 13b blocks the lubricating oil that splashes from the contact point between the oiler 9 and the guide rail 150 and heads toward the upper surface of the installation base 21b. As a result, the eaves portion 13b prevents the lubricating oil from splashing when it hits the upper surface of the installation base 21b and adhering to the light incident surface of the imaging unit 14.

[0052] The speed detection device 10 (imaging unit 14) of this embodiment is located between the oiler 9 and the upper guide shoe 8A in the vertical direction. The upper guide shoe 8A is closer to the car body 2 than the oiler 9 and the speed detection device 10. This makes it possible to reduce the distance between the portion (upper guide shoe 8A) that comes into contact with the guide rail 150 and the car body 2. As a result, rattle of the passenger car 110 relative to the guide rail 150 can be suppressed. In addition, the upper guide shoe 8A can be firmly fixed to the car body 2.

[0053] 2. Second embodiment [Configuration of car] Next, the configuration of a car according to a second embodiment will be described with reference to Fig. 6. Fig. 6 is a diagram illustrating the path of lubricating oil scattered from the oiler of the car according to the second embodiment.

[0054] The car 110B according to the second embodiment shown in Fig. 6 has the same configuration as the car 110 according to the first embodiment. The car 110B differs from the car 110 according to the first embodiment in the speed detection device 10B and the shielding unit 23. Therefore, the speed detection device 10B and the shielding unit 23 will be described here, and a duplicate description of the same configuration as in the first embodiment will be omitted.

[0055] As shown in Fig. 6, the speed detection device 10B is disposed above the upper guide shoe 8A. The speed detection device 10B is fixed to the upper part of the car body 2 via a bracket 21. The speed detection device 10B faces the guide rail 150 at a certain distance in the left-right direction.

[0056] The speed detection device 10B captures an image of the guide rail 150 when the car 110B moves up and down, and detects the moving speed of the car 110B. As in the first embodiment, two speed detection devices 10B may be provided, but at least one speed detection device 10B is sufficient. The speed detection device 10B sends data on the moving speed of the car 110B to the control device 11.

[0057] The speed detection device 10B has a case 16, an imaging unit 14, and a calculation unit 15. The case 16 is formed in a flat, approximately rectangular parallelepiped shape. One left-right side of the case 16 overlaps with the Euler 9 in the vertical direction. The other left-right side of the case 16 does not overlap with the Euler 9 in the vertical direction. The case 16 houses the imaging unit 14 and the calculation unit 15. The imaging unit 14 is arranged on one left-right side within the case 16. The calculation unit 15 is arranged on the other left-right side within the case 16.

[0058] One side surface 16a of the case 16 faces the guide rail 150. An image capturing opening is formed in one side surface 16a of the case 16. The image capturing opening exposes the light incident surface of the image capturing unit 14. Note that the eaves portion 13b according to the first embodiment is not formed on one side surface 16a of the case 16.

[0059] An opening for the calculation unit is formed on the other side in the left-right direction at the top of the case 16. The opening for the calculation unit faces the calculation unit 15. A lid 16b is detachably attached to the top of the case 16. The lid 16b opens and closes the opening for the calculation unit. The opening for the calculation unit of the case 16 does not overlap with the oiler 9 in the up-down direction. This allows an operator to easily attach and detach the lid 16b to and from the case 16. As a result, an operator can easily perform maintenance, inspection, and replacement work on the calculation unit 15.

[0060] The shielding portion 23 has a rising piece 23a and a shielding plate 23b. The rising piece 23a extends in the vertical direction. A lower portion of the rising piece 23a is fixed to the mounting base 21b of the bracket 21. The vertical length of the rising piece 23a is longer than the vertical length of the case 16.

[0061] The shielding plate 23b is made of a plate having a plane that is approximately perpendicular to the up-down direction. One of the planes of the shielding plate 23b, the lower surface, is fixed to the upper part of the rising piece 21a. The lower surface of the shielding plate 23b faces the upper part of the case 16 at an appropriate distance in the up-down direction. One left-right side of the shielding plate 23b protrudes toward the guide rail 150 beyond one side surface 13a of the case 16. The shielding plate 23b blocks lubricating oil leaking from the oiler 9 and heading toward the light incident surface of the imaging unit 14.

[0062] The shielding plate 23b is set to a size that blocks a straight line connecting the contact point between the oiler 9 and the guide rail 150 and the light incident surface of the imaging unit 14. This allows the shielding plate 23b to reliably block lubricating oil that scatters from the contact point between the oiler 9 and the guide rail 150 and heads toward the light incident surface of the imaging unit 14.

[0063] Therefore, the shielding plate 23b prevents the lubricating oil from adhering to the light incident surface of the imaging unit 14. This prevents the lubricating oil from entering the image captured by the imaging element of the imaging unit 14. As a result, the calculation unit 15 can extract feature points with high accuracy and calculate the moving speed of the car 110 with high accuracy.

[0064] Furthermore, the shielding plate 23b is set to a size that blocks the straight line connecting the contact point between the oiler 9 and the guide rail 150 and the upper surface of the installation base 21b. This allows the shielding plate 23b to block the lubricating oil that splashes from the contact point between the oiler 9 and the guide rail 150 and heads toward the upper surface of the installation base 21b. As a result, the eaves portion 13b prevents the lubricating oil from splashing when it hits the upper surface of the installation base 21b and adhering to the light incident surface of the imaging unit 14.

[0065] The car and elevator of the present invention have been described above, including their functions and effects. However, the car and elevator of the present invention are not limited to the above-described embodiments, and various modifications are possible within the scope of the invention as set forth in the claims.

[0066] For example, in the first embodiment described above, the speed detection device 10 (imaging unit) is disposed between the oiler 9 and the upper guide shoe 8A. However, the imaging unit according to the present invention may be located below the oiler, or may be located below the guide shoe. In this case, since the guide shoe is located between the imaging unit and the oiler, a visor or shielding unit for blocking scattered lubricating oil can be omitted.

[0067] In the first embodiment described above, the speed detection device 10 has a calculation unit that calculates the moving speed of the car 110. However, the calculation unit that calculates the moving speed of the car 110 may be included in the control device. Also, in the first embodiment described above, the control device 11 has a distance calculation unit that calculates the moving distance of the car 110. However, the speed detection device 10 may have a distance calculation unit that calculates the moving distance of the car 110.

[0068] The above-described embodiments are intended to provide a detailed and easy-to-understand explanation of the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace a portion of the configuration of one embodiment with the configuration of another embodiment, or to add a configuration of another embodiment to a configuration of one embodiment. Furthermore, it is possible to add, delete, or replace a portion of the configuration of each embodiment with another configuration.

[0069] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but also include "parallel" and "orthogonal" and may also mean a "substantially parallel" or "substantially orthogonal" state within a range in which the functions can be exerted.

[0070] DESCRIPTION OF SYMBOLS 1...Elevator, 2...Cage body, 3...Cage door, 4...Door opening / closing device, 5...Door sill, 7...Apron, 8...Guide shoe, 8A...Upper guide shoe, 8B...Lower guide shoe, 9...Oiler, 9a...Case, 9b...Cover, 9c...Oiler pad, 10, 10B...Speed ​​detection device, 11...Control device, 13, 16...Case, 13a, 16a...One side surface, 13b...Eaves portion, 13c, 16b...Cover portion, 14...Imaging unit, 15...Calculation unit, 21...Bracket, 21a...Rising piece, 21b...Installation base, 22...Oiler support portion, 23...Shielding portion, 100...Hoistway, 110, 110B...Cage, 111...Lifting pulley, 120... Hoist, 130... Counterweight, 131... Weight-side pulley, 150... Pair of guide rails, 170... Rope

Claims

1. A car comprising: a car body; a guide shoe attached to the car body and slidably engaging with a guide rail arranged in an elevator shaft; an oiler attached to the car body and applying lubricating oil to the guide rail; an imaging unit attached to the car body and taking images of the surface of the guide rail; and a calculation unit that calculates the speed of the car based on the image taken by the imaging unit, wherein the imaging unit is installed below the oiler.

2. The elevator car according to claim 1, wherein the imaging unit is installed between the guide shoe and the oiler.

3. A passenger car as described in claim 2, comprising a case for housing the imaging unit, the case having an imaging opening for exposing the light incident surface of the imaging unit, and a canopy portion formed above the imaging opening.

4. A car according to claim 3, wherein the eave portion is set to a size that blocks a straight line connecting the contact point between the oiler and the guide rail and the light incident surface.

5. A passenger car as described in claim 3, wherein the case houses the calculation unit, the calculation unit is positioned so as not to overlap with the oiler in the vertical direction, an opening for the calculation unit facing the calculation unit is formed in the upper part of the case, and the case has a lid portion for opening and closing the opening for the calculation unit.

6. A passenger car as described in claim 3, wherein the case is fixed to the upper part of the car body via an installation base, and the installation surface of the case is located above the ceiling work surface of the car body.

7. The elevator car according to claim 1, further comprising a shielding section disposed between the imaging section and the oiler, for blocking lubricating oil from flowing from the oiler to the imaging section.

8. The elevator car according to claim 7, wherein the shielding portion is set to a size that blocks a straight line connecting the contact point between the oiler and the guide rail and the light incident surface of the imaging portion.

9. An elevator comprising: a car that moves up and down in a hoistway; and a guide rail that is arranged in the hoistway and guides the car as it moves up and down, wherein the car comprises: a car body; a guide shoe that is attached to the car body and slidably engages with the guide rail; an oiler that is attached to the car body and applies lubricating oil to the guide rail; an imaging unit that is attached to the car body and takes an image of the surface of the guide rail; and a calculation unit that calculates the speed of the car based on the image taken by the imaging unit, wherein the imaging unit is installed below the oiler.