Tail cord damage suppression device and elevator device

Abstract

This prevents damage to the tail cord caused by contact between the tail cord and the plate. [Solution] The tail cord damage suppression device according to this embodiment is a tail cord damage suppression device for suppressing damage to the tail cord of an elevator. The tail cord damage suppression device comprises a plate and a protective member. The plate supports the guide rail. The protective member is attached to the corner of the upper surface of the plate. The protective member includes a surface that prevents the tail cord from riding up.

Description

[[Technical Field]]

[0001] Embodiments relate to a tail cord damage suppressing device and an elevator apparatus. [[Background Art]]

[0002] A tail cord damage suppressing device for suppressing damage to a tail cord of an elevator apparatus is known. The tail cord damage suppressing device is attached to a car of the elevator apparatus, and suppresses damage to the tail cord caused by contact with the car. [[Prior Art Literature]] [[Patent Literature]]

[0003] [[Patent Literature 1]] Japanese Unexamined Patent Application Publication No. 2014-37301 [[Patent Literature 2]] Japanese Unexamined Patent Application Publication No. 8-245142 [[Outline of the Invention]] [[Problem to be Solved by the Invention]]

[0004] A tail cord can be damaged by contact with a plate that supports a guide rail. However, it is difficult for a tail cord damage suppressing device attached to a car to suppress contact between the tail cord and the plate. Embodiments are aimed at suppressing damage to a tail cord caused by contact between the tail cord and the plate. [[Means for Solving the Problem]]

[0005] A tail cord damage suppressing device according to an embodiment is a tail cord damage suppressing device for suppressing damage to a tail cord of an elevator. The tail cord damage suppressing device comprises a plate and a protective member. The plate supports a guide rail. The protective member is attached to a corner of an upper surface of the plate. The protective member includes a climbing suppressing surface for the tail cord. [[Brief Description of the Drawings]]

[0006] [Figure 1A] Figure 1A is a diagram illustrating an example of an embodiment, and is a side view of an elevator device. [Figure 1B] Figure 1B is a diagram illustrating an example of an embodiment, and is a side view of an elevator device. [Figure 2] Figure 2 is a perspective view of a part of the elevator system. [Figure 3] Figure 3 is an enlarged perspective view of Figure 2 to show the tail cord damage suppression device. [Figure 4] Figure 4 is a plan view of a part of the elevator system. [Figure 5] Figure 5 is a side view of the protective member. [Figure 6] Figure 6 is a plan view of the protective member. [Figure 7] Figure 7 is a perspective view of a part of an elevator system, including a modified tail cord damage suppression device. [Figure 8] Figure 8 is a plan view of the elevator system shown in Figure 7. [Figure 9] Figure 9 is a perspective view of the protective member of the tail cord damage suppression device shown in Figure 7. [Modes for carrying out the invention]

[0007] Embodiments of the present invention will be described with reference to the drawings. For ease of illustration and understanding, the dimensional ratios in the drawings may be changed from the dimensional ratios of the actual object. Components shown in one drawing may be omitted in other drawings.

[0008] The terms used to specify shapes, geometric conditions such as "parallel" and "orthogonal," and values ​​of lengths and angles are not interpreted strictly, but rather within a range that allows for the expectation of similar functionality.

[0009] In the following explanation, the vertical direction D1 and the horizontal direction D2 are mutually orthogonal directions. The horizontal direction D2 and the front-back direction D3 are mutually orthogonal directions. The vertical direction D1 and the front-back direction D3 are mutually orthogonal directions.

[0010] Directions common to multiple drawings are indicated by arrows with a common reference numeral in each drawing. In each illustrated direction, the tip of the arrow is the first side, and the opposite side, i.e., the base of the arrow, is the second side. The first side in a direction perpendicular to the drawing is indicated by a symbol of a circle with a dot inside. The second side in a direction perpendicular to the drawing is indicated by a symbol of a circle with an X inside.

[0011] Figures 1A to 6 are diagrams illustrating an example of an embodiment of the present invention. Figures 1A and 1B show an elevator device 1. The elevator device 1 includes a car 3, guide rails 10 for the car 3, a tail cord 11 electrically connected to the car 3, and a tail cord damage suppression device 20.

[0012] The elevator device 1 in Figures 1A and 1B further includes a counterweight 4, a main rope 5 connecting the car 3 and the counterweight 4, and a hoisting machine 6 for winding up the main rope 5. The hoisting machine 6 includes a sheave 7 and a deflector wheel 8.

[0013] In the elevator system 1 shown in Figures 1A and 1B, the car 3, counterweight 4, main rope 5, guide rail 10, tail cord 11, and tail cord damage prevention device 20 are located in the hoistway 2A. In the elevator system 1 shown in Figures 1A and 1B, the hoisting machine 6 is located in the machine room 2B above the hoistway 2A. The car 3 and counterweight 4 move vertically in direction D1 within the hoistway 2A.

[0014] The main rope 5 of Figs. 1A and 1B is connected to the car 3 at one end. The main rope 5 is connected to the counterweight 4 at the other end. In Fig. 1B, the main rope 5 extends from the hoistway 2A into the machine room 2B. In the machine room 2B, the main rope 5 is wound around a sheave 7 provided on a hoisting machine 6 and a deflector sheave 8. The car 3 moves up and down, that is, moves in the vertical direction D1 along the guide rails 10 as the hoisting machine 6 hoists the main rope 5. The counterweight 4 moves in the direction opposite to the car 3 in the vertical direction D1 as the hoisting machine 6 hoists the main rope 5. The counterweight 4 may move in the vertical direction D1 along unillustrated counterweight guide rails. The counterweight guide rails guide the lifting and lowering of the counterweight 4.

[0015] As shown in Figs. 1A and 1B, the elevator apparatus 1 may further include a control panel 9. In Figs. 1A and 1B, the control panel 9 is disposed above the car 3 and the counterweight 4. The control panel 9 controls at least one of the operation of the hoisting machine 6 and the operation of the car 3. The control panel 9 may control the operation of the hoisting machine 6 in response to a hall call and a car call. The control panel 9 may cause the car 3 to land at the landing of the registered floor by controlling the operation of the hoisting machine 6 in response to a hall call and a car call.

[0016] The guide rails 10 of Figs. 1A and 1B extend in the vertical direction D1. The guide rails 10 guide the lifting and lowering of the car 3. As shown in Fig. 4, the guide rail 10 includes a base portion 101 and a protruding portion 102 protruding from the base portion 101 toward the car 3. The base portion 101 extends in the vertical direction D1 and the front-rear direction D3. The protruding portion 102 extends in the vertical direction D1 and the left-right direction D2. In Figs. 1A and 1B, the illustration of the upper ends of the guide rails 10 is omitted. A guide roller (not shown) attached to the car 3 may roll in contact with the protruding portion 102 of the guide rail 10 via a guide shoe (not shown) attached to the car 3.

[0017] The tail cord 11 in FIG. 1A is connected at one end to the lower end of the car 3. The tail cord 11 is connected at the other end to the control panel 9. The tail cord 11 in FIGS. 1A and 1B electrically connects the car 3 and the control panel 9. As shown in FIG. 1A, the connection position between the car 3 and the tail cord 11 and the connection position between the control panel 9 and the tail cord 11 are separated from each other in the left-right direction D2. Accordingly, the tail cord 11 in FIG. 1A includes: a first portion 111 hanging downward from the lower end of the car 3, a second portion 112 hanging downward from the control panel 9, and a third portion 113 connecting the first portion 111 and the second portion 112.

[0018] In FIGS. 1B and 4, the guide rail 10 and the tail cord 11 are adjacent to each other in the front-rear direction D3. In FIGS. 1B and 4, the front-rear direction D3 is also the arrangement direction of the guide rail 10 and the tail cord 11.

[0019] The tail cord 11 may include wiring for supplying electric power to the car 3 and wiring for transmitting electric signals between the control panel 9 and the car 3. The car 3 may be controlled by the control panel 9 via the electric signals transmitted through the wiring of the tail cord 11.

[0020] Incidentally, the guide rail 10 in FIGS. 1A to 4 is supported by a support member 26. The support member 26 includes the tail cord damage suppressing device 20 and a mounting member 25. The guide rail 10 is fixed inside the hoistway 2A by a plate 21, which will be described later, of the tail cord damage suppressing device 20 and the mounting member 25. The elevator apparatus 1 in FIGS. 1A and 1B includes a plurality of tail cord damage suppressing devices 20. Each of the plurality of tail cord damage suppressing devices 20 fixes the guide rail 10 to the hoistway 2A at different positions in the vertical direction D1. As will be described later, damage to the tail cord 11 can be suppressed because the elevator apparatus 1 includes the tail cord damage suppressing device 20.

[0021] The elevator device 1 in Figures 1A and 1B further includes a wire mesh 12 facing the tail cord 11. The wire mesh 12 faces the tail cord 11 in the longitudinal direction D3. The wire mesh 12 is located in the hoistway 2A. The wire mesh 12 is fixed within the hoistway 2A by a connecting member 13, which will be described later. As shown in Figure 1B, the wire mesh 12 extends in the vertical direction D1 and the longitudinal direction D3 within the hoistway 2A. Details of the tail cord damage suppression device 20 will be described later.

[0022] The elevator device 1 in Figures 1A, 1B, 2, and 4 further includes connecting members 13 that connect the wire mesh 12 and the guide rail 10. The wire mesh 12 is fixed within the hoistway 2A via the tail cord damage suppression device 20, the guide rail 10, and the connecting members 13. The elevator device 1 may include multiple connecting members 13, as shown in Figure 1A. In the elevator device 1 of Figure 1A, the tail cord damage suppression device 20 and the connecting members 13 are arranged alternately in the vertical direction D1.

[0023] The connecting member 13 in Figures 2 and 4 includes an arm 131 and a bracket 132. The arm 131 is attached to the guide rail 10. The arm 131 may also be attached to the guide rail 10 by a rail clip 133, as shown in Figure 2. When attached to the guide rail 10, the arm 131 extends in the left-right direction D2. As shown in Figure 4, the arm 131 may include a portion bent in the front-rear direction D3. The illustrated arm 131 includes a portion bent away from the guide rail 10 in the front-rear direction D3.

[0024] In Figures 2 and 4, the bracket 132 is fixed to the arm 131. The bracket 132 may also be fixed to the arm 131 by bolts 134 and nuts 135, as shown in Figures 2 and 4. In Figure 4, the wire mesh 12 is located between the arm 131 and the bracket 132. The bracket 132 is fixed to the arm 131 via the wire mesh 12. When fixed to the arm 131, the bracket 132 extends in the left-right direction D2.

[0025] As described above, the arm 131 in Figure 4 includes a portion that is bent away from the guide rail 10 in the front-rear direction D3. As a result, the wire mesh 12 is fixed in a position further away from the car 3 than the guide rail 10 in the left-right direction D2, as shown in Figure 1A. Also, in Figure 1A, the third portion 113 of the tail cord 11 is positioned between the guide rail 10 and the wire mesh 12 in the left-right direction D2. In other words, by including the portion of the arm 131 that is bent in the front-rear direction D3, the tail cord 11 (third portion 113) facing the wire mesh 12 can be separated from the car 3. By separating the tail cord 11 from the car 3, damage to the tail cord 11 due to contact between the car 3 and the tail cord 11 (third portion 113) is suppressed.

[0026] Figures 2 and 3 show perspective views of the tail cord damage prevention device 20. The tail cord damage prevention device 20 includes a plate 21 and a protective member 30. The plate 21 supports the guide rail 10. The protective member 30 is attached to the upper surface 22 of the plate 21. Specifically, the protective member 30 is attached to the corner 23 of the upper surface 22. The corner 23 includes a portion located between the guide rail 10 and the wire mesh 12 in the left-right direction D2, and between the guide rail 10 and the tail cord 11 in the front-rear direction D3.

[0027] The plate 21 in Figures 2 to 4 includes an upward-facing upper surface 22 and a lower surface 24 opposite to the upper surface 22. The plate 21 extends in the left-right direction D2 and the front-back direction D3. The illustrated plate 21 may be fixed to the wall surface of the elevator shaft 2A at the second end in the left-right direction D2.

[0028] Next, the details of the protective member 30 will be explained, mainly by referring to Figures 3 to 7. Of Figures 3 to 7, Figure 5 is a side view of the protective member 30. Specifically, Figure 5 is a view of the protective member 30 from the first side in the left-right direction D2. Figure 6 is a top view of the protective member 30.

[0029] The term "plan view" used for elevator device 1 or its components refers to a view as seen from above. Similarly, the term "plan view" used for elevator device 1 or its components refers to a view as seen from above. The term "side view" used for elevator device 1 or its components refers to a view as seen from a direction not parallel to the vertical direction D1. The term "lateral view" used for elevator device 1 or its components refers to a direction not parallel to the vertical direction D1.

[0030] The protective member 30 in Figure 4 is located between the guide rail 10 and the tail cord 11 in the front-rear direction D3. The protective member 30 is positioned between the guide rail 10 and the wire mesh 12 in the front-rear direction D3. Furthermore, the protective member 30 in Figure 4 includes a portion that protrudes from the corner 23 in the left-right direction D2. Moreover, the protective member 30 includes a portion that protrudes from the corner 23 in the front-rear direction D3. Therefore, as shown in Figures 4 and 5, when viewed from above, the protective member 30 extends beyond the corner 23 in both the left-right direction D2 and the front-rear direction D3.

[0031] The protective member 30 in Figure 5 includes a first plate-like portion 31 and a second plate-like portion 32 bent relative to the first plate-like portion 31. The first plate-like portion 31 includes a mounting surface 34 of the protective member 30. The mounting surface 34 is the downward-facing surface of the first plate-like portion 31. The protective member 30 contacts the upper surface 22 of the plate 21 at the mounting surface 34 of the first plate-like portion 31. That is, the first plate-like portion 31 is the portion that contacts the upper surface 22 of the protective member 30. The first plate-like portion 31 has a thickness direction parallel to the normal direction of the mounting surface 34. The normal direction of the illustrated mounting surface 34 is parallel to the vertical direction D1. The first plate-like portion 31 has a side surface that extends in the thickness direction between the mounting surface 34 and the surface opposite to the mounting surface 34. The first plate-like portion 31 may have multiple side surfaces.

[0032] The first plate-like portion 31 in Figure 5 includes a corner portion 31R located at the point where two non-parallel surfaces connect. The first plate-like portion 31 in Figure 5 includes multiple corner portions 31R. In the first plate-like portion 31, a corner portion 31R may be formed by the installation surface 34 and a side surface. In the first plate-like portion 31, a corner portion 31R may be formed by the surface opposite to the installation surface 34 and a side surface. In the first plate-like portion 31, a corner portion 31R may be formed by two side surfaces.

[0033] The first plate-like portion 31 has a first extending direction DL1. The installation surface 34 extends in the first extending direction DL1 and the left-right direction D2. The first extending direction DL1 is the direction in which the installation surface 34 extends when the protective member 30 is observed from the guide rail 10 side. In the first plate-like portion 31 of Figure 5, the first extending direction DL1 is parallel to the front-rear direction D3.

[0034] The second plate-like portion 32 in Figure 5 is the portion of the protective member 30 that is not in contact with the upper surface 22 of the plate 21. The second plate-like portion 32 includes a tail cord 11 restraining surface 35. The illustrated restraining surface 35 includes an inclined surface 36 that is inclined with respect to the mounting surface 34. In the protective member 30 attached to the upper surface 22 of the plate 21, the inclined surface 36 is inclined with respect to the upper surface 22. The inclined surface 36 is inclined so that as it moves away from the plate 21 in the vertical direction D1, it moves away from the tail cord 11 in the front-rear direction D3. In other words, as the inclined surface 36 moves away from the plate 21 in the vertical direction D1, it is inclined so that it approaches the guide rail 10 in the front-rear direction D3. The angle θ between the inclined surface 36 and the upper surface 22 may be 45° or more and 70° or less.

[0035] The second plate-like portion 32 has a thickness direction parallel to the normal direction of the mounting restraint surface 35. In the protective member 30 of Figure 5, the thickness direction of the first plate-like portion 31 and the thickness direction of the second plate-like portion 32 are non-parallel to each other.

[0036] The second plate-like portion 32 in Figure 5 includes a corner portion 32R located at the point where two non-parallel surfaces connect. The second plate-like portion 32 in Figure 5 includes multiple corner portions 32R. In the second plate-like portion 32, a corner portion 32R may be formed by the mounting-restraining surface 35 and a side surface. In the second plate-like portion 32, a corner portion 32R may be formed by the surface opposite to the mounting-restraining surface 35 and a side surface. In the second plate-like portion 32, a corner portion 32R may be formed by two side surfaces.

[0037] The second plate-like portion 32 has a second extending direction DL2. The climbing restraint surface 35 extends in the second extending direction DL2 and the left-right direction D2. The second extending direction DL2 is the direction in which the climbing restraint surface 35 extends when the protective member 30 is observed from the guide rail 10 side. In the second plate-like portion 32 of Figure 5, the second extending direction DL2 is the direction that extends between the up-down direction D1 and the front-rear direction D3 in the circumferential direction centered on the left-right direction D2. The second extending direction DL2 is inclined with respect to the up-down direction D1, as shown by the arrow in Figure 5. In the protective member 30 of Figures 3 to 5, the dimension L2 of the second plate-like portion 32 in the second extending direction DL2 is longer than the dimension L1 of the first plate-like portion 31 in the first extending direction DL1.

[0038] The second plate-like portion 32 may include a curved surface 37 connected to the climbing restraint surface 35, as shown in Figure 5. The curved surface 37 in Figure 5 is curved around an axis parallel to the left-right direction D2. The curved surface 37 connects the installation surface 34 and the climbing restraint surface 35. The curved surface 37 in Figure 5 is located outside the plate 21 in the front-rear direction D3. The curved surface 37 is further from the centerline of the plate 21 in the front-rear direction D3 than the corner portion 23.

[0039] The first plate-like portion 31 and the second plate-like portion 32 may be formed by bending a plate-like member. The first plate-like portion 31 and the second plate-like portion 32 may be formed by bending a chamfered plate-like member. As a result of being formed from a chamfered plate-like member, the first plate-like portion 31 may be chamfered at corner 31R, and the second plate-like portion 32 may be chamfered at corner 32R. The plate-like member may be chamfered at all corners. The plate-like member may be chamfered at some corners.

[0040] As shown in Figures 5 and 6, the protective member 30 may include a third plate-shaped portion 33 that connects the first plate-shaped portion 31 and the second plate-shaped portion 32. The third plate-shaped portion 33 is connected to the upward-facing surface of the first plate-shaped portion 31 and to the surface of the second plate-shaped portion 32 opposite to the mounting-restraining surface 35. The third plate-shaped portion 33 extends in the vertical direction D1. By including the third plate-shaped portion 33 in the protective member 30, the movement of the second plate-shaped portion 32 relative to the first plate-shaped portion 31 is suppressed. Specifically, when the protective member 30 is attached to the plate 21, the swinging of the second plate-shaped portion 32 relative to the first plate-shaped portion 31 is suppressed.

[0041] The elevator device 1 may further include mounting members 25 for attaching the tail cord damage suppression device 20 to the guide rail 10, as shown in Figures 2 to 4. The tail cord damage suppression device 20 and the mounting members 25 may constitute a support member 26.

[0042] The mounting member 25 in Figures 3 and 4 includes a main body 251, a rail clip 252, and a connecting member 253. The main body 251 is attached to the upper surface 22 of the plate 21. The main body 251 may also be attached to the plate 21 by welding. The illustrated main body 251 includes a portion facing the guide rail 10 in the left-right direction D2 and a portion facing the upper surface 22 of the plate 21 in the front-rear direction D3. The illustrated main body 251 has an L-shape or inverted L-shape when viewed from the front-rear direction D3. The main body 251 may be provided with a hole through which the bolt of the connecting member 253, described later, can pass.

[0043] The mounting member 25 in Figures 3 and 4 includes a pair of rail clips 252 that are spaced apart from each other in the front-rear direction D3. The pair of rail clips 252 are attached to the portion of the main body 251 facing the guide rail 10 via a connecting member 253. The guide rail 10 in Figures 3 and 4 is sandwiched between the pair of rail clips 252 at both ends in the front-rear direction D3. The movement of the guide rail 10 relative to the support member 26 is restricted by being sandwiched between the pair of rail clips 252. The rail clips 252 may be provided with holes through which the bolts of the connecting member 253, described later, can pass.

[0044] By including the rail clip 252 in the mounting member 25, processing for support by the support member 26 can be avoided in the guide rail 10. For example, compared to the case where the mounting member includes a bolt, the provision of bolt holes in the guide rail 10 can be avoided.

[0045] The mounting member 25 in Figures 3 and 4 includes a pair of connecting members 253 that are separated from each other in the front-rear direction D3. The connecting members 253 include a bolt and a nut. The bolt's shaft passes through a hole provided in the rail clip and a hole provided in the main body 251. The shaft of the bolt includes a portion that protrudes from the main body 251 in the left-right direction D2. A nut is attached to the portion of the shaft that protrudes from the main body 251. The guide rail 10 in Figure 4 is sandwiched between the main body 251 and the rail clip 252 by tightening the nut.

[0046] The operation of the elevator device 1 having the above configuration will be explained. Specifically, the mechanism by which the tail cord damage suppression device 20 suppresses damage to the tail cord 11 will be explained.

[0047] The tail cord hanging in the hoistway swings due to various factors such as airflow in the hoistway, movement of the elevator car, and earthquakes. The swinging tail cord in the hoistway can move in a direction where it faces the wire mesh. In the elevator device 1 of Figure 4, the tail cord 11 can move in the left-right direction D2 toward the wire mesh 12. This movement in the left-right direction D2 is attenuated by the contact of the tail cord 11 with the wire mesh 12. In the elevator device 1, the wire mesh 12 can suppress the movement of the tail cord 11 in the left-right direction D2.

[0048] A tail cord swinging within the hoistway also moves in the direction of the alignment of the guide rail and the tail cord. In elevator device 1 of Figure 4, the tail cord 11 may move in the front-rear direction D3 toward the guide rail 10. The wire mesh positioned opposite the tail cord makes it difficult to restrain the tail cord's movement in the alignment direction. A tail cord moving in the alignment direction may come into contact laterally with a plate supporting the guide rail, which is exposed between the guide rail and the tail cord. When the tail cord comes into contact with the plate from the side, it rides up onto the plate. When the tail cord rides up onto the plate, a force is applied in the width direction of the tail cord in a direction that pushes the tail cord down. The tail cord can be damaged by such a force.

[0049] In contrast, the tail cord damage suppression device 20 described above includes a protective member 30 attached to the corner 23 of the upper surface 22 of the plate 21. The protective member 30 includes a surface 35 that prevents the tail cord 11 from riding up onto the plate 21. In the elevator device 1 including the tail cord damage suppression device 20, the tail cord 11 moving toward the guide rail 10 comes into contact with the surface 35 from the side. The tail cord damage suppression device 20 can prevent the tail cord 11 from riding up onto the plate 21 by the tail cord 11 coming into contact with the surface 35.

[0050] Furthermore, the area of ​​the tail cord 11 that contacts the overlapping restraint surface 35 is larger than the area of ​​the tail cord 11 that contacts the plate 21. As a result, the stress acting on the tail cord 11 when it contacts the overlapping restraint surface 35 from the side is smaller than the stress acting on the tail cord 11 when it contacts the plate 21 from the side. By reducing the stress acting on the tail cord 11, the amount of deformation of the tail cord 11 is suppressed. As a result of suppressing the amount of deformation of the tail cord 11, the tail cord damage suppression device 20, including the protective member 30, can suppress damage to the tail cord 11 due to contact with the plate 21.

[0051] The anti-riding surface 35 shown in Figure 5 is an inclined surface 36 that is tilted relative to the upper surface 22 of the plate 21. When the anti-riding surface 35 is an inclined surface 36, the tail cord damage suppression device 20 can effectively suppress the tail cord 11 from riding onto the anti-riding surface 35.

[0052] Furthermore, when the mounting restraint surface 35 is an inclined surface 36, the area of ​​the tail cord 11 that contacts the mounting restraint surface 35 can be adjusted according to the amount of movement of the tail cord 11 toward the guide rail 10. In such a tail cord damage suppression device 20, on the one hand, when the amount of movement of the tail cord 11 toward the guide rail 10 is relatively large, the area of ​​the tail cord 11 that contacts the inclined surface 36 expands. By expanding the area of ​​the tail cord 11 that contacts the inclined surface 36, the aforementioned stress acting on the tail cord 11 can be reduced. On the other hand, when the amount of movement of the tail cord 11 toward the guide rail 10 is relatively small, the area of ​​the tail cord 11 that contacts the inclined surface 36 shrinks. By shrinking the area of ​​the tail cord 11 that contacts the inclined surface 36, the tail cord damage suppression device 20 can mitigate the impact caused by contact with the tail cord 11. As a result, the tail cord damage suppression device 20 can suppress damage to the tail cord 11 due to contact with the plate 21 and stably support the guide rail 10.

[0053] In particular, from the viewpoint of effectively reducing the aforementioned stress acting on the tail cord 11, it is preferable that the angle θ between the inclined surface 36 and the upper surface 22 be 45° or more and 70° or less. From a similar viewpoint, in the protective member 30, it is preferable that the dimension L2 of the second plate-like portion 32 in the second extending direction DL2 is larger than the dimension L1 of the first plate-like portion 31 in the first extending direction DL1.

[0054] In Figure 4, the protective member 30, when attached to the plate 21, protrudes from the corner 23 of the upper surface 22 when viewed from above. This arrangement of the protective member 30 ensures that the illustrated mounting restraint surface 35 includes a portion positioned closer to the tail cord 11 than to the plate 21. Furthermore, the mounting restraint surface 35 is exposed closer to the tail cord 11 than to the wire mesh 12. These features prevent the tail cord 11, moving toward the guide rail 10, from contacting the plate 21 from the side. By suppressing contact with the plate 21, damage to the tail cord 11 due to contact with the plate 21 can be more effectively prevented.

[0055] Furthermore, as shown in Figure 5, the second plate-like portion 32 includes a curved surface 37 connected to the ramp-restricting surface 35 from below. When the ramp-restricting surface 35 is an inclined surface 36 and the protective member 30 protrudes from the corner 23 as described above, the tail cord 11 moving toward the guide rail 10 may come into contact with the curved surface 37 from the side. When the tail cord 11 comes into contact with the curved surface 37 from the side, a sudden increase in stress due to contact with the protective member 30 is suppressed. This further effectively suppresses damage to the tail cord 11.

[0056] The first plate-shaped portion 31 described above is chamfered at the corner 31R that extends beyond the corner 23. Similarly, the second plate-shaped portion 32 is chamfered at the corner 32R that extends beyond the corner 23. When the tail cord 11 comes into contact with such a protective member 30, damage to the corner 31R of the first plate-shaped portion 31 and the corner 32R of the second plate-shaped portion 32 is suppressed. Therefore, damage to the tail cord 11 due to contact between the tail cord 11 and the protective member 30 can be suppressed.

[0057] To more effectively suppress damage to the tail cord 11 that comes into contact with the overlap-suppression surface 35, an upper limit may be set for the arithmetic mean roughness Ra of the overlap-suppression surface 35. Specifically, the arithmetic mean roughness Ra of the overlap-suppression surface 35 may be 1.2 μm or less. There is no particular lower limit for the arithmetic mean roughness Ra of the overlap-suppression surface 35. The arithmetic mean roughness Ra of the overlap-suppression surface 35 may be 0.1 μm or more.

[0058] The arithmetic mean roughness Ra is the average of the absolute values ​​of the height Z(x) of the roughness curve at position x of the measurement target over a reference length l. The sign of Z(x) is negative when it is less than the average value of Z(x) over the reference length l. The sign of Z(x) is positive when it is greater than the average value of Z(x) over the reference length l. The roughness curve is a contour curve obtained by blocking high-wavelength components. High-wavelength components are blocked by applying a high-pass filter. The cutoff frequency of the high-pass filter is 0.25 mm. The arithmetic mean roughness Ra of the overlap suppression surface 35 is measured using a stylus-type surface roughness measuring instrument in accordance with JIS B 0601:2013.

[0059] Next, a modified example of the embodiment will be described with reference to Figures 7 to 9. In the following description of the modified example, and in Figures 7 to 9, explanations that overlap with the specific example described above will be omitted. In Figures 7 to 9, the same reference numerals as in the specific example described above are used for parts that can be configured in the same way as in the specific example described above.

[0060] Figures 7 to 9 illustrate modified examples of the protective member 30. The protective member 30 includes a fixing member 41 fixed to the plate 21 and a roller 42 rotatably supported on the fixing member 41. As shown in Figure 8, the roller 42 is rotatable relative to the fixing member 41 about a rotation axis RA. The rotation axis RA in Figure 8 extends in the front-rear direction D3. The rotation axis RA is located between the guide rail 10 and the wire mesh 12 in the left-right direction D2. The rotation axis RA in Figure 8 faces the tail cord 11 in the front-rear direction D3. The protective member 30 further includes a fastening member 43 that rotatably fixes the roller 42 to the fixing member 41, as shown in Figure 9.

[0061] As shown in Figure 9, the fixing member 41 includes an installation surface 34 for the plate 21. The fixing member 41 in Figure 9 includes a bottom plate portion 411 and a side plate portion 412 bent relative to the bottom plate portion 411. The installation surface 34 is located on the bottom plate portion 411. The side plate portion 412 includes a first portion 412A facing the outer circumferential surface of the roller 42 and a second portion 412B facing the bottom surface of the roller 42. In the side plate portion 412, the second portion 412B is bent relative to the first portion 412A. The second portion 412B in Figure 9 is provided with a through hole through which the fastening member 43 described above can pass.

[0062] The fixing member 41 may further include a connecting portion 415 that connects the bottom plate portion 411 and the side plate portion 412. This suppresses the swinging of the side plate portion 412 relative to the bottom plate portion 411. By including the connecting portion 415, the fixing member 41 can stably support the roller 42.

[0063] The roller 42 in Figure 8 includes a portion that extends beyond the corner 23 of the upper surface 22. The roller 42 includes a tail cord 11 restraining surface 35. The restraining surface 35 includes a first portion 35A and a second portion 35B. The first portion 35A has a cylindrical shape with the rotation axis RA as its axis. The second portion 35B has a hemispherical shape. The second portion 35B is located between the first portion 35A and the tail cord 11 in the front-rear direction D3.

[0064] As shown in Figure 9, the roller 42 may include a shaft portion 420 that protrudes in an axial direction parallel to the rotation axis RA. In Figure 9, the roller 42 passes through a through hole provided in the second portion 412B of the side plate portion 412 at the shaft portion. As shown in Figure 9, a fastening member 43 may be attached to the shaft portion 420 of the roller 42. The fastening member 43 may be a nut. In Figure 9, the roller 42 is attached to the fixing member 41 as a result of the fastening member 43 being attached to the shaft portion 420.

[0065] The operation of the tail cord damage suppression device 20 shown in Figures 7 and 8 will be explained. In the elevator device 1 shown in Figure 8, the tail cord 11 moving toward the guide rail 10 comes into contact with the roller 42 from the second side in the front-rear direction D3. The tail cord 11 may also ride up onto the roller 42.

[0066] When the tail cord 11 rides onto the anti-riding surface 35, the roller 42 rotates relative to the fixing member 41 about the rotation axis RA. The rotation of the roller 42 about the rotation axis RA causes the tail cord 11 to move outward from the plate 21, that is, to the first side in the left-right direction D2 in Figure 8. The rotation of the roller 42 about the rotation axis RA prevents the tail cord 11 from riding onto the plate 21 and from riding onto the anti-riding surface 35.

[0067] In Figure 8, the second portion 35B of the mounting restraint surface 35 is located between the first portion 35A of the mounting restraint surface 35 and the tail cord 11 in the front-rear direction D3, that is, in the direction of alignment of the guide rail 10 and the tail cord 11. The second portion 35B has a hemispherical shape that is convex toward the tail cord 11. With a roller 42 having such a shape, when the tail cord 11 contacts the second portion 35B of the mounting restraint surface 35 from the side, a sudden increase in stress due to contact with the second portion 35B is suppressed in the tail cord 11. This suppresses damage to the tail cord 11 due to contact with the roller 42.

[0068] In Figure 8, the rotation axis RA of the roller 42 is located between the guide rail 10 and the wire mesh 12 in the left-right direction D2, that is, in the direction in which the tail cord 11 and the wire mesh 12 face each other. By positioning the roller 42 in this way, the tail cord 11 moving toward the roller 42 (guide rail 10) can be prevented from moving toward the wire mesh 12 in the left-right direction D2. As a result, when the roller 42 rotates around the rotation axis RA, the tail cord 11 that is in contact with the mounting suppression surface 35 can be moved outward from the plate 21. Therefore, contact between the tail cord 11 and the plate 21 can be stably suppressed.

[0069] According to the embodiments described above, the tail cord damage suppression device 20 of the elevator device 1 can suppress damage to the tail cord 11 caused by contact between the tail cord 11 and the plate 21.

[0070] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of symbols]

[0071] 1: Elevator device, 2A: Hoistway, 2B: Machine room, 10: Guide rail, 11: Tail cord, 12: Wire mesh, 13: Connecting member, 20: Tail cord damage prevention device, 21: Plate, 22: Top surface, 23: Corner, 30: Protective member, 31: First plate-shaped part, 31R: Corner, 32: Second plate-shaped part, 32R: Corner, 34: Installation surface, 35: Climbing prevention surface, 36: Inclined surface, 41: Fixing member, 42: Roller, 43: Fastening member, D1: Up / down direction, D2: Left / right direction, D3: Front / back direction, DL1: First longitudinal direction, DL2: Second longitudinal direction

Claims

1. A tail cord damage suppression device for suppressing damage to the tail cord of an elevator system, A plate that supports the guide rail, The plate comprises a protective member attached to the corner of the upper surface, The protective member includes a surface that prevents the tail cord from riding up, The aforementioned climbing restraint surface includes an inclined surface that is inclined with respect to the upper surface, The protective member includes a first plate-shaped portion that contacts the corner, and a second plate-shaped portion that is bent relative to the first plate-shaped portion and includes the surface that prevents the object from climbing up. The first plate-shaped portion includes the mounting surface of the protective member, The protective member contacts the upper surface of the plate on the installation surface. A tail cord damage suppression device, wherein, when the protective member is observed from the guide rail side, the dimensions of the second plate-shaped portion in the direction in which the mounting suppression surface extends are larger than the dimensions of the first plate-shaped portion in the direction in which the installation surface extends.

2. The tail cord damage suppression device according to claim 1, wherein the angle between the inclined surface and the upper surface is 45° or more and 70° or less.

3. The first plate-like portion is chamfered at the corners that protrude from the corners, The tail cord damage suppression device according to claim 1, wherein the second plate-like portion is chamfered at the corner portion that protrudes from the corner portion.

4. The tail cord damage suppression device according to claim 1, wherein the arithmetic mean roughness of the mounting suppression surface is 1.2 μm or less.

5. A tail cord damage suppression device for suppressing damage to the tail cord of an elevator system, A plate that supports the guide rail, The plate comprises a protective member attached to the corner of the upper surface, The protective member includes a surface that prevents the tail cord from riding up, The protective member includes a fixing member fixed to the plate and a roller rotatably supported by the fixing member. The roller is a tail cord damage suppression device, including the mounting suppression surface.

6. basket, A guide rail for guiding the raising and lowering of the aforementioned car, A tail cord electrically connected to the aforementioned basket, An elevator system comprising a tail cord damage suppression device according to any one of claims 1 to 5.

7. The system further includes a wire mesh facing the aforementioned tail cord, The elevator device according to claim 6, wherein the climbing restraint surface includes a portion exposed on the tail cord side of the wire mesh.

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