Elevator car upper safety fence and elevator

Abstract

To provide an elevator car upper safety fence capable of preventing interference with an on-car device even when the height of the car upper safety fence is secured high.SOLUTION: The elevator car upper safety fence comprises a left fence part, a right fence part and a back fence part, and is installed to be foldable on a car of an elevator. Each of the left and right fence parts includes an upper crosspiece. At least one of the upper crosspieces of the left and right fence parts is divided so as to form a prescribed space in the longitudinal midway of the upper crosspiece, and has a movable crosspiece movable in the longitudinal direction of the upper crosspiece so as to open / close the prescribed space. In a state where the movable crosspiece is moved in the direction for opening the prescribed space, an on-car device is disposed in the prescribed space.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an overhead safety fence for an elevator and an elevator.

Background Art

[0002] Workers who perform maintenance and inspection of elevators often work on the car. Therefore, an overhead safety fence is installed on the elevator car to ensure the safety of the workers. The overhead safety fence is configured to be foldable. When performing maintenance and inspection of the elevator, the overhead safety fence is deployed by the worker. Also, when the maintenance and inspection of the elevator are completed, the overhead safety fence is folded by the worker.

[0003] As this type of conventional technology, for example, Patent Document 1 describes an overhead safety fence (car handrail device) for an elevator, which includes a left fence portion arranged on the left side when viewed from the landing side of the elevator, a right fence portion (right handrail) arranged on the right side when viewed from the landing side, and a rear fence portion (rear handrail) connecting the left fence portion and the right fence portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to improve the safety of workers working on the car, it is necessary to ensure a large height dimension of the overhead safety fence. However, when the height dimension of the overhead safety fence is increased, the overhead safety fence is likely to interfere with the equipment installed on the car (hereinafter referred to as "overhead equipment") when the overhead safety fence is folded.

[0006] An object of the present invention is to provide an elevator car upper safety fence that can avoid interference with equipment above the car even when a large height dimension of the car upper safety fence is ensured, and an elevator including the same.

Means for Solving the Problems

[0007] In order to solve the above problems, for example, the configuration described in the claims is adopted. This application includes a plurality of means for solving the above problems. If one of them is mentioned, it includes a left fence portion disposed on the left side when viewed from the landing side of the elevator, a right fence portion disposed on the right side when viewed from the landing side, and a back fence portion connecting the left fence portion and the right fence portion, and is a car upper safety fence that is foldably installed on the elevator car. The left fence portion and the right fence portion each have an upper rail. Among the upper rails of the left fence portion and the upper rail of the right fence portion, at least one upper rail is divided so as to form a predetermined space in the middle of the length direction of the upper rail, and has a movable rail portion that is movable in the length direction of the upper rail so as to open and close the predetermined space. When the movable rail portion is moved in the direction of opening the predetermined space to fold the car upper safety fence, the equipment above the car is arranged within the predetermined space.

Effects of the Invention

[0008] According to the present invention, even when a large height dimension of the car upper safety fence is ensured, interference with equipment above the car can be avoided. Problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same function or configuration are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. Also, the following description and drawings are examples for explaining the present invention, and may be omitted and simplified for convenience of explanation. Each component may be singular or plural unless otherwise particularly limited.

[0011] FIG. 1 is a perspective view showing the configuration of the car top safety fence of the elevator according to this embodiment. FIG. 2 is a right side view of the car top safety fence of the elevator according to this embodiment. FIG. 3 is a front view of the car top safety fence of the elevator according to this embodiment. In FIGS. 1 to 3, the X direction, Y direction, and Z direction are indicated by arrows, respectively, in order to clarify the shape and positional relationship of each part. The X direction and Y direction are directions perpendicular to each other in the horizontal plane, and the Z direction is a direction perpendicular to the X direction and Y direction. This is the same in other drawings.

[0012] As shown in FIG. 1, the car top safety fence 10 of the elevator according to this embodiment is installed on the upper surface 15a of the car 15 in order to ensure the safety of the operator who rides on the car 15 to perform maintenance and inspection of the elevator. The car 15 moves up and down while being guided by guide rails in a hoistway (not shown). The car top safety fence 10 is installed on the car 15 so as to be foldable. FIG. 1 shows a state in which the car top safety fence 10 is deployed so that the operator can enter the car top safety fence 10 and work safely. In the state where the car top safety fence 10 is deployed, the Z direction is the height direction of the car top safety fence 10.

[0013] The car-top safety fence 10 includes a left fence part 11 arranged on the left side when viewed from the landing side F of the elevator, a right fence part 12 arranged on the right side when viewed from the landing side F, a rear fence part 13 arranged on the back side (the back side of the car 15) when viewed from the landing side F, and a reinforcing connection 14 arranged on the front side when viewed from the landing side F. The left fence part 11, the right fence part 12, and the rear fence part 13 each have an upper rail and a middle rail as will be described later. The left fence part 11 and the right fence part 12 are supported by a plurality (four in the illustrated example) of columns 16.

[0014] Each column 16 has an upper column part 16a, a lower column part 16b, and a connecting part 17. The connecting part 17 connects the lower end of the upper column part 16a and the upper end of the lower column part 16b. The connecting part 17 connects the upper column part 16a and the lower column part 16b using, for example, two bolts. In that case, for example, plate-like members for connection are fixed to the lower end part of the upper column part 16a and the upper end part of the lower column part 16b, and these plate-like members are fastened and fixed using two bolts. In this way, the upper column part 16a and the lower column part 16b are connected by the connecting part 17 to form one column 16.

[0015] By adopting the structure in which the column 16 is divided vertically as described above, when installing the car-top safety fence 10 on the car 15, the installation work can be carried out with the upper column part 16a and the lower column part 16b separated. Therefore, even when the total length of the column 16 is increased to ensure a large height dimension of the car-top safety fence 10, the installation work of the car-top safety fence 10 can be easily carried out.

[0016] (Left fence part 11) The left fence portion 11 has an upper crossbar 21, a middle crossbar 22, a plurality (three in the illustrated example) of vertical crossbars 23, and an auxiliary vertical crossbar 24. The upper crossbar 21 is arranged parallel to the depth direction of the car 15 so as to extend from one end to the other end in the depth direction of the car 15. Also, the upper crossbar 21 is arranged at the uppermost part of the left fence portion 11. The upper crossbar 21 is constituted by a rectangular tube-shaped member that is long in the depth direction of the car 15. A bracket 18 for a fall prevention device is attached to the corner portion formed by the upper crossbar 21 and the column 16. The bracket 18 is For example, when a fall prevention device such as a full harness is attached to the upper crossbar 21 through the space at the corner portion formed by the upper crossbar 21 and the column 16, it is a member that suppresses the positional deviation of the fall prevention device in the length direction of the upper crossbar 21. One bracket 18 is attached to each column 16.

[0017] The middle crossbar 22 is arranged below the upper crossbar 21 with a predetermined distance therebetween. Similar to the above-described upper crossbar 21, the middle crossbar 22 is arranged parallel to the depth direction of the car 15 so as to extend from one end to the other end in the depth direction of the car 15. Also, the middle crossbar 22 is constituted by a rectangular tube-shaped member that is long in the depth direction of the car 15.

[0018] The plurality of vertical crossbars 23 are arranged at a predetermined distance in the length direction of the upper crossbar 21. Each vertical crossbar 23 connects the upper crossbar 21 and the middle crossbar 22 between two columns 16 arranged on the left side when viewed from the landing side F. Each vertical crossbar 23 is arranged in a direction perpendicular (parallel to the Z direction in FIG. 1) to the upper crossbar 21 and the middle crossbar 22. The upper end of the vertical crossbar 23 is fixed to the upper crossbar 21, and the lower end of the vertical crossbar 23 is fixed to the middle crossbar 22. By arranging a plurality of vertical crossbars 23 between the upper crossbar 21 and the middle crossbar 22 in this way, it becomes difficult for an operator to slip through the space between the upper crossbar 21 and the middle crossbar 22. Therefore, even when the separation distance between the upper crossbar 21 and the middle crossbar 22 is increased in order to ensure a large height dimension of the car-top safety fence 10, the presence of the vertical crossbars 23 can suppress the operator from slipping through. Note that the number of vertical crossbars 23 provided in the left fence portion 11 can be changed according to the size of the car-top safety fence 10.

[0019] The auxiliary vertical bar 24 is disposed so as to protrude downward from the middle bar 22. The upper end of the auxiliary vertical bar 24 is fixed to the middle bar 22. The auxiliary vertical bar 24 is disposed within the space between the middle bar 22 and the upper surface 15a of the car 15 that face each other in the Z direction. By disposing the auxiliary vertical bar 24 in this manner, the inner normal area formed by the upper surface 15a of the car 15, the middle bar 22, and the support column 16 can be narrowed due to the presence of the auxiliary vertical bar 24, and the safety of the operator can be enhanced.

[0020] (Right fence portion 12) The right fence portion 12 includes an upper bar 27, a middle bar 28, a plurality (two in the illustrated example) of vertical bars 29, an auxiliary vertical bar 30, a movable bar portion 31, an auxiliary middle bar 32, and a second vertical bar 33. The upper bar 27 is disposed parallel to the depth direction of the car 15 so as to extend from one end to the other end in the depth direction of the car 15. Further, the upper bar 21 is disposed at the uppermost part of the right fence portion 12. The upper bar 27 is constituted by a prismatic member that is long in the depth direction of the car 15.

[0021] Further, the upper crossbar 27 is divided so as to form a predetermined space 34 (see FIG. 4) in the middle of the upper crossbar 27 in the longitudinal direction. Specifically, the upper crossbar 27 is divided into a first upper crossbar portion 27a and a second upper crossbar portion 27b. Also, the upper crossbar 27 has a movable crossbar portion 31 that is movable in the longitudinal direction of the upper crossbar 27. The length of the first upper crossbar portion 27a is shorter than the length of the second upper crossbar portion 27b. The first upper crossbar portion 27a and the second upper crossbar portion 27b are arranged on the same straight line parallel to the depth direction of the car 15. Further, the proximal end portion of the first upper crossbar portion 27a is fixed to the upper end of the column 16 close to the landing side F, and the proximal end side of the second upper crossbar portion 27b is fixed to the upper end of the column 16 far from the landing side F. And the predetermined space 34 is formed between the tip of the first upper crossbar portion 27a and the tip of the second upper crossbar portion 27b. The predetermined space 34 is a space for avoiding interference between the upper crossbar 27 and the equipment above the car (described later) when the upper car safety fence 10 is folded. For this reason, the dimension and position of the predetermined space 34 in the longitudinal direction of the upper crossbar 27 are set according to the dimension and position of the equipment above the car that is the object of interference avoidance.

[0022] The middle crossbar 28 is disposed below the upper crossbar 27 with a predetermined distance therebetween. The middle crossbar 28 is arranged parallel to the depth direction of the car 15 so as to extend from one end to the other end in the depth direction of the car 15 in the same manner as the above-described upper crossbar 27. Also, the middle crossbar 28 is constituted by a rectangular tube-shaped member that is long in the depth direction of the car 15.

[0023] The plurality of vertical crossbars 29 are arranged at predetermined intervals in the longitudinal direction of the upper crossbar 27. Each vertical crossbar 29 connects the upper crossbar 27 and the middle crossbar 28 between the two columns 16 arranged on the right side when viewed from the landing side F. Each vertical crossbar 29 is arranged in a direction perpendicular to the upper crossbar 27 and the middle crossbar 28 (a direction parallel to the Z direction in FIG. 1). The upper end of the vertical crossbar 29 is fixed to the upper crossbar 27, and the lower end of the vertical crossbar 29 is fixed to the middle crossbar 28. The reason for providing the vertical crossbar 29 on the right side fence portion 12 is the same as the reason for providing the vertical crossbar 23 on the left side fence portion 11.

[0024] The auxiliary vertical bar 30 is disposed to protrude downward from the middle bar 28. The upper end portion of the auxiliary vertical bar 30 is fixed to the middle bar 28. The reason for providing the auxiliary vertical bar 30 on the right fence portion 12 is the same as the reason for providing the auxiliary vertical bar 24 on the left fence portion 11.

[0025] The auxiliary middle bar 32 is disposed between the upper bar 27 (the first upper bar portion 27a) and the middle bar 28. In the longitudinal direction of the upper bar 27, the length of the auxiliary middle bar 32 is longer than the length of the predetermined space 34. One end portion of the auxiliary middle bar 32 is fixed to the support column 16 (the upper support column portion 16a), and the other end portion of the auxiliary middle bar 32 is fixed to the vertical bar 29. By providing the auxiliary middle bar 32 in this way, even when the upper bar 27 is formed into a split structure to form the predetermined space 34, the strength necessary for ensuring the safety of the operator can be ensured. Further, when the operator expands the safety fence 10 on the cage, even if the operator tries to lean on the upper bar 27 before the predetermined space 34 is closed by the moving bar portion 31, the operator can be supported by the auxiliary middle bar 32. Further, even when a vertical bar cannot be installed between the upper bar 27 and the middle bar 28 due to the existence of the predetermined space 34, a vertical bar (the second vertical bar 33) can be installed below the space 34 by using the auxiliary middle bar 32.

[0026] A bracket 18 for a fall arrest device is attached to the corner portion formed by the upper bar 27 (the second upper bar portion 27b) and the support column 16, and a bracket 18 for a fall arrest device is also attached to the corner portion formed by the auxiliary middle bar 32 and the support column 16. Further, as shown in FIG. 2, a guard member 20 is attached to the auxiliary middle bar 32 by a wing nut 19. The guard member 20 is a member for preventing the operator from gripping the auxiliary middle bar 32. The guard member 20 is disposed to protrude above the auxiliary middle bar 32 (toward the upper bar 27 side) so that the operator cannot grip the auxiliary middle bar 32 by hand. The guard member 20 is attached to a bar that is dangerous for the operator to grip. For this reason, the position where the guard member 20 is attached is not limited to the auxiliary middle bar 32, and may be any bar of the left fence portion 11, the right fence portion 12, and the rear fence portion 13 respectively. Further, the number of guard members 20 provided in the safety fence 10 on the cage is not limited to one, and may be plural.

[0027] The second vertical rail 33 is disposed between the auxiliary middle rail 32 and the middle rail 28. The upper end of the second vertical rail 33 is fixed to the auxiliary middle rail 32, and the lower end of the second vertical rail 33 is fixed to the middle rail 28. The second vertical rail 33, together with the above-mentioned multiple vertical rails 29, is disposed at a predetermined interval in the depth direction of the car 15. By providing the second vertical rail 33 in this manner, it becomes difficult for a worker to slip through the space between the auxiliary middle rail 32 and the middle rail 28, and the safety of the worker can be improved. The number of vertical rails 29 and the number of second vertical rails 33 provided on the right fence section 12 can be changed according to the size of the car-top safety fence 10.

[0028] (Moving rail 31) The movable rail 31 is provided so as to be movable in the length direction of the upper rail 27 so as to open and close a predetermined space 34. Fig. 4 is an enlarged view showing a state in which the predetermined space 34 formed midway in the length direction of the upper rail 27 has been opened by the movable rail 31, and Fig. 5 is an enlarged view showing a state in which the predetermined space 34 formed midway in the length direction of the upper rail 27 has been closed by the movable rail 31. Fig. 6 is a cross-sectional view taken along line AA in Fig. 4, and Fig. 7 is a cross-sectional view taken along line BB in Fig. 5.

[0029] As shown in FIG. 6, the moving rail 31 is fitted to the second upper rail 27b of the upper rail 27. The moving rail 31 is an elongated member formed with a cross section in a generally inverted U-shape. The moving rail 31 is fitted to the second upper rail 27b in a state in which it can slide in the length direction of the upper rail 27. A guide groove 36 is formed in one side wall 31a of the moving rail 31. The guide groove 36 is formed elongated along the longitudinal direction of the moving rail 31. In addition, a notch 35 (see FIGS. 4 and 7) is formed at the end of the moving rail 31. The notch 35 is formed to fix the end of the moving rail 31 with a thumbscrew 42 when the moving rail 31 closes a predetermined space 34.

[0030] As shown in FIGS. 4 and 6, a guide fulcrum portion 37 is provided at the tip side of the second upper crosspiece portion 27b of the upper crosspiece 27. The guide fulcrum portion 37 is configured using bolts. The shaft portion 37a of the bolt serving as the guide fulcrum portion 37 is inserted into the guide groove 36 of the movable crosspiece portion 31. Further, a through hole 38 (see FIG. 6) is provided in the second upper crosspiece portion 27b of the upper crosspiece 27. The through hole 38 is formed at a position facing the guide groove 36. The shaft portion 37a of the guide fulcrum portion 37 protrudes into the internal space of the upper crosspiece 27 (second upper crosspiece portion 27b) through the above-described guide groove 36 and through hole 38.

[0031] As shown in FIG. 6, a nylon nut 39 is attached inside the second upper crosspiece portion 27b. The nylon nut 39 is a nut having a function of preventing loosening. The male thread formed on the shaft portion 37a of the guide fulcrum portion 37 is screwed into the nylon ring of the nylon nut 39. Further, a flat washer 40 is attached inside the second upper crosspiece portion 27b together with the nylon nut 39. The flat washer 40 is pressed against the side wall portion of the second upper crosspiece portion 27b by the nylon nut 39. Also, a flat washer 41 is attached to the head of the bolt serving as the guide fulcrum portion 37.

[0032] Thereby, the movable crosspiece portion 31 is supported so as to be movable in the longitudinal direction of the upper crosspiece 27 with the guide groove 36 inserted into the shaft portion 37a of the guide fulcrum portion 37. In the present embodiment, the guide fulcrum portion 37 is attached to the second upper crosspiece portion 27b using the nylon nut 39 in order to guide the movement of the movable crosspiece portion 31, but the mechanism for guiding the movement of the movable crosspiece portion 31 can be variously changed.

[0033] On one side, as shown in FIG. 7, a pop nut 45 is attached inside the first upper crossbar portion 27a. The pop nut 45 is fixed to the side wall portion of the first upper crossbar portion 27a by caulking. The male screw portion 42a of the wing screw 42 meshes with the female screw portion of the pop nut 45. As shown in FIG. 5, when a predetermined space 34 (see FIG. 4) is closed by the movable crossbar portion 31, the end portion of the movable crossbar portion 31 is fitted to the tip end portion of the first upper crossbar portion 27a, and the notch portion 35 of the movable crossbar portion 31 is received by the male screw portion 42a of the wing screw 42. For this reason, by tightening the wing screw 42 with an appropriate force so as to push in the side wall portion 31a of the movable crossbar portion 31 with the head of the wing screw 42, the end portion of the movable crossbar portion 31 is fixed to the tip end portion of the first upper crossbar portion 27a. Thereby, the first upper crossbar portion 27a and the second upper crossbar portion 27b are connected via the movable crossbar portion 31.

[0034] In this embodiment, the wing screw 42 and the pop nut 45 are used to fix the end portion of the movable crossbar portion 31 to the tip end portion of the first upper crossbar portion 27a. However, the mechanism for fixing the end portion of the movable crossbar portion 31 to the tip end portion of the first upper crossbar portion 27a can be variously changed.

[0035] (Rear fence portion 13) The rear fence portion 13 includes a left rear fence portion 51 located on the left side when viewed from the platform side F, a right rear fence portion 52 located on the right side when viewed from the platform side F, and a connecting mechanism portion 53 that connects the left rear fence portion 51 and the right rear fence portion 52.

[0036] As shown in FIGS. 1 and 3, the left rear fence portion 51 has an upper crossbar 55, a middle crossbar 56, a vertical bar 57, an auxiliary vertical bar 58, and a connecting vertical bar 59. The upper crossbar 55 and the middle crossbar 56 are each constituted by an L-shaped plate. When viewed from the platform side F, the left end portion of the upper crossbar 55 is connected to the end portion of the upper crossbar 21, and a rotation fulcrum portion 60 (see FIG. 1) is provided at this connection portion. Also, when viewed from the platform side F, the left end portion of the middle crossbar 56 is connected to the end portion of the middle crossbar 22, and a rotation fulcrum portion (not shown) is also provided at this connection portion. The vertical bar 57 is disposed between the upper crossbar 55 and the middle crossbar 56. The auxiliary vertical bar 58 protrudes downward from the middle crossbar 56. The upper end portion of the auxiliary vertical bar 58 is fixed to the middle crossbar 56.

[0037] The connecting vertical bar 59 is a vertical bar for connecting the left rear fence portion 51 and the right rear fence portion 52. The connecting vertical bar 59 is formed in a vertically long flat plate shape. As shown in FIG. 3, a connecting plate 61, a pair of upper and lower clamping plates 62, and a wing nut 63 are attached to the connecting vertical bar 59. The connecting plate 61 is rotatably supported about a rotation fulcrum portion 64 (see FIG. 3). Two arc-shaped grooves (not shown) are formed in the connecting plate 61. In this specification, of the two arc-shaped grooves formed in the connecting plate 61, one arc-shaped groove is described as an arc-shaped groove for connection locking, and the other arc-shaped groove is described as an arc-shaped groove for connection release. The arc-shaped groove for connection release fits into the male screw portion of the wing nut 63 when the connecting plate 61 is rotated counterclockwise from the state shown in FIG. 3. Also, as shown in FIG. 3, the arc-shaped groove for connection locking fits into the male screw portion of a wing nut 72 provided on the right rear fence portion 52 side when connecting the left rear fence portion 51 and the right rear fence portion 52 by the connection mechanism portion 53. The pair of upper and lower clamping plates 62 is a member that restricts the movement of the rear fence portion 13 in the depth direction of the car 15 by sandwiching the connecting vertical bar 69 provided on the right rear fence portion 52 in a sandwiching manner.

[0038] As shown in FIGS. 1 and 3, the right rear fence portion 52 has an upper crossbar 65, a middle crossbar 66, a vertical bar 67, an auxiliary vertical bar 68, and a connecting vertical bar 69. The upper crossbar 65 and the middle crossbar 66 are each formed of a plate in an L shape. When viewed from the boarding side F, the right end portion of the upper crossbar 65 is connected to the end portion of the upper crossbar 27, and a rotation fulcrum portion 70 (see FIG. 1) is provided at this connection portion. Also, when viewed from the boarding side F, the left end portion of the middle crossbar 66 is connected to the end portion of the middle crossbar 28, and a rotation fulcrum portion (not shown) is also provided at this connection portion. The vertical bar 67 is disposed between the upper crossbar 65 and the middle crossbar 66. The auxiliary vertical bar 68 is disposed so as to protrude downward from the middle crossbar 66. The upper end portion of the auxiliary vertical bar 68 is fixed to the middle crossbar 66. The reason for providing the auxiliary vertical bars 58 and 68 in the rear fence portion 13 is to narrow the inner normal area formed by the upper surface 15a of the car 15, the middle crossbars 56 and 66, and the columns 16 due to the presence of the auxiliary vertical bar 58, thereby enhancing the safety of the operator.

[0039] The connecting vertical bar 69 is a vertical bar for connecting the left rear fence portion 51 and the right rear fence portion 52. The connecting vertical bar 69 is formed in a vertically long flat plate shape. The connecting vertical bar 69 is disposed adjacent to the connecting vertical bar 59 when connecting the left rear fence portion 51 and the right rear fence portion 52. A pair of upper and lower position regulating plates 71 and a wing nut 72 (see FIG. 3) are attached to the connecting vertical bar 69. The pair of upper and lower position regulating plates 71 are members that regulate the movement of the rear fence portion 13 in the vertical direction by sandwiching the above-described pair of clamping plates 62 from above and below when connecting the left rear fence portion 51 and the right rear fence portion 52.

[0040] In the rear fence portion 13 having the above-described configuration, when connecting the left rear fence portion 51 and the right rear fence portion 52, the connecting vertical bars 59 of the left rear fence portion 51 and the connecting vertical bars 69 of the right rear fence portion 52 are made adjacent to each other. At this time, after slightly tilting the two columns 16 arranged on the back side as viewed from the platform side F outward, the connecting vertical bars 59 and the connecting vertical bars 69 are made adjacent to each other, and the connecting vertical bar 69 is clamped by a pair of clamping plates 62. At this time, the pair of position regulating plates 71 are arranged in a state of clamping the pair of clamping plates 62 from above and below. Further, by rotating the connecting plate 61 clockwise, the arcuate groove for connecting lock of the connecting plate 61 fits into the male screw portion of the wing screw 72. When the wing screw 72 is tightened in this state, the connecting plate 61 is fixed to the connecting vertical bar 69. Therefore, even when a force is applied to pull the left rear fence portion 51 and the right rear fence portion 52 in a direction parallel to the Y direction, the connection state between the connecting vertical bar 59 and the connecting vertical bar 69 is maintained by the connecting plate 61.

[0041] On the other hand, when releasing the connection state between the left rear fence portion 51 and the right rear fence portion 52, the connecting plate 61 is rotated counterclockwise from the state shown in FIG. 3. Thereby, the arcuate groove for connection release of the connecting plate 61 fits into the male screw portion of the wing screw 63. When the wing screw 63 is tightened in this state, the connecting plate 61 is fixed to the connecting vertical bar 59. Therefore, when a force is applied to pull the left rear fence portion 51 and the right rear fence portion 52 in a direction parallel to the Y direction, the left and right columns 16 tilt outward. As a result, the pair of clamping plates 62 are displaced to a position where they are disengaged from the connecting vertical bar 69. Also, the pair of position regulating plates 71 are displaced to a position where they do not interfere with the pair of clamping plates 62. For this reason, with respect to the left rear fence portion 51, the left rear fence portion 51 can be superposed inside the left fence portion 11 by rotating the left rear fence portion 51 in a direction approaching the upper bar 21 around the rotation fulcrum portion 60. Also, with respect to the right rear fence portion 52, the right rear fence portion 52 can be superposed inside the right fence portion 12 by rotating the right rear fence portion 52 in a direction approaching the upper bar 27 around the rotation fulcrum portion 70.

[0042] Note that the basic configuration of the rear fence portion 13 is the same as that of the rear fence portion (rear handrail) described in Patent Document 1 above. However, the fact that the rear fence portion 13 has the vertical bars 57, 67 and the auxiliary vertical bar 58 is different from the rear fence portion (rear handrail) described in Patent Document 1.

[0043] (Reinforcing connection 14) As shown in FIG. 1, the reinforcing connection 14 is a member that supplements the strength on the front side of the car upper safety fence 10 so that the left and right support columns 16 arranged on the front side when viewed from the landing side F do not spread outward. The reinforcing connection 14 is horizontally arranged so as to connect the ends of the upper bar 21 of the left fence portion 11 and the upper bar 27 of the right fence portion 12 when viewed from the landing side F. One end portion of the reinforcing connection 14 is rotatably supported about the rotation fulcrum portion 75. The other end portion of the reinforcing connection 14 is fixed to the end portion of the upper bar 27 (first upper bar portion 27a) by a wing nut 76. The reinforcing connection 14 can be overlapped with the upper bar 21 by loosening the wing nut 76 and rotating the reinforcing connection 14 in a direction approaching the upper bar 21. The reinforcing connection 14 is constituted by, for example, an L-shaped plate so as to easily overlap the reinforcing connection 14 with the upper bar 21.

[0044] (Support structure of the support column 16) Of the four support columns 16, the two support columns 16 arranged on the left side when viewed from the landing side F are supported by the corresponding support portions 80a, and the two support columns 16 arranged on the right side when viewed from the landing side F are supported by the corresponding support portions 80b. Each of the support portions 80a, 80b is fixed to the upper surface 15a of the car 15 using, for example, two bolts. Each of the support portions 80a, 80b stands vertically from the upper surface 15a of the car 15. When comparing the heights of the support portions 80a, 80b with reference to the upper surface 15a of the car 15, the height of the support portion 80a is higher than the height of the support portion 80b. Also, as shown in FIG. 3, a rotation fulcrum portion 81a is provided on the support portion 80a, and a rotation fulcrum portion 81b is provided on the support portion 80b. The rotation fulcrum portion 81a is arranged at a position higher than the rotation fulcrum portion 81b.

[0045] When viewed from the platform side F, the two columns 16 arranged on the left can be switched between the upright state shown in FIG. 1 and the collapsed state shown in FIG. 8 by rotating about the pivot portions 81a of the corresponding support portions 80a. When the two columns 16 arranged on the left are collapsed as shown in FIG. 8 when viewed from the platform side F, the left fence portion 11 attached to these two columns 16 also collapses. Also, when viewed from the platform side F, the two columns 16 arranged on the right can be switched between the upright state shown in FIG. 1 and the collapsed state shown in FIG. 8 by rotating about the pivot portions 81b of the corresponding support portions 80b. When the two columns 16 arranged on the right are collapsed as shown in FIG. 8 when viewed from the platform side F, the right fence portion 12 attached to these two columns 16 also collapses.

[0046] Also, as described above, when viewed from the platform side F, the height dimension of the left support portion 80a is larger than the height dimension of the right support portion 80b, and the left pivot portion 81a is arranged at a higher position than the right pivot portion 81b. Therefore, when the right fence portion 12 is first collapsed about the pivot portion 81b and then the left fence portion 11 is collapsed about the pivot portion 81a, as shown in FIGS. 9 and 10, the left fence portion 11 is arranged to overlap the right fence portion 12. FIG. 9 is a front view showing the folded state of the car top safety fence 10. FIG. 10 is a left side view showing the folded state of the car top safety fence 10.

[0047] Also, lock members 82a and 82b (see FIGS. 1 and 9) corresponding to the two support portions 80a and 80b arranged on the front side when viewed from the platform side F are assembled respectively. The lock member 82a is a member that prevents the column 16 from falling when an operator pushes down the lock member 82a when the left fence portion 11 is pulled up around the support portion 80a to raise the column 16. The lock member 82b is a member that prevents the column 16 from falling when an operator pushes down the lock member 82b when the right fence portion 12 is pulled up around the support portion 80b to raise the column 16. In other words, the lock member 82a and the lock member 82b are members that hold the corresponding columns 16 in an upright state.

[0048] An elongated groove 83a is formed in the lock member 82a, and an elongated groove 83b is also formed in the lock member 82b. A shaft portion (not shown) of the pivot point portion 81a is inserted into the groove 83a of the lock member 82a. When the two columns 16 supporting the left fence portion 11 are raised, the lock member 82a is raised together with the column 16, and in this state, when the operator pushes down the lock member 82a, the upright state of the column 16 is locked (held) by the lock member 82a. Further, when the operator pulls up the lock member 82a in a state where the column 16 is locked in an upright state, the locked state by the lock member 82a is released. Therefore, the operator can tilt the two columns 16 supporting the left fence portion 11 in a direction approaching the upper surface 15a of the car body 15.

[0049] In the groove 83b of the lock member 82b, a shaft portion (not shown) of the pivot portion 81b is inserted. When the two support columns 16 supporting the right fence portion 12 are erected, the lock member 82b stands up together with the support columns 16. In this state, when the operator pushes down the lock member 82b, the erected state of the support columns 16 is locked (held) by the lock member 82b. Also, when the operator pulls up the lock member 82b while the support columns 16 are locked in the erected state, the locked state by the lock member 82b is released. For this reason, the operator can tilt the two support columns 16 supporting the right fence portion 12 in a direction approaching the upper surface 15a of the car body 15. When tilting the two support columns 16 supporting the right fence portion 12, prior to that, the butterfly screw 42 is loosened and the moving crosspiece portion 31 is moved in a direction separating from the first upper crosspiece portion 27a as shown in FIG. 4, thereby forming a predetermined space 34 between the first upper crosspiece portion 27a and the second upper crosspiece portion 27b. At this time, the direction in which the moving crosspiece portion 31 moves corresponds to the direction of opening a predetermined auxiliary middle crosspiece 32.

[0050] As described above, the configuration of pushing down the lock members 82a and 82b to lock the support columns 16 in the erected state or pulling up the lock members 82a and 82b to release the lock by the lock members 82a and 82b is basically the same as the configuration described in the above Patent Document 1.

[0051] On the other hand, among the two support portions 80a and 80b arranged on the back side from the landing side F, a detection sensor 85 is arranged near the support portion 80a. The detection sensor 85 is a sensor for detecting whether the car top safety fence 10 is in a folded state. The detection sensor 85 may be a contact type sensor or a non-contact type sensor. The output signal of the detection sensor 85 is switched between on and off states depending on the posture of the support column 16. For example, the output signal of the detection sensor 85 is in an off state when the support column 16 is erected and in an on state when the support column 16 is tilted. The output signal of the detection sensor 85 is taken into an elevator control unit (not shown).

[0052] FIG. 11 is a flowchart showing the procedure for deploying the car top safety fence of the elevator according to the present embodiment from the folded state. First, the operator raises the left fence portion 11 to erect the support columns 16, and in that state, presses down the locking member 82a (step S11). Then, the output signal of the detection sensor 85 becomes the off state (step S12). When the locking member 82a is pressed down as described above, the two support columns 16 supporting the left fence portion 11 are held in the erected state.

[0053] Next, the operator raises the right fence portion 12 to erect the support columns 16, and in that state, presses down the locking member 82b (step S13). When the locking member 82b is pressed down in this way, the two support columns 16 supporting the right fence portion 12 are held in the erected state.

[0054] Next, the operator gets on the upper surface 15a of the car 15 (step S14). Next, the operator assembles the rear fence portion 13 (step S15). The procedure for assembling the rear fence portion 13 is the same as the procedure for connecting the left rear fence portion 51 and the right rear fence portion 52.

[0055] Next, the operator assembles the reinforcement connection 14 (step S16). Specifically, after rotating the reinforcement connection 14 in a direction away from the upper crossbar 21 about the rotation fulcrum portion 75, the end portion of the reinforcement connection 14 on the side opposite to the rotation fulcrum portion 75 is fixed to the end portion of the upper crossbar 27 (the first upper crossbar portion 27a) by a wing nut 76.

[0056] Next, the operator moves the moving crossbar portion 31 so as to close the predetermined space 34, and then tightens the wing nut 42 to fix the moving crossbar portion 31 (step S17). Thus, as shown in FIG. 1, the car top safety fence 10 is in the deployed state.

[0057] FIG. 12 is a flowchart showing the procedure for folding the car top safety fence of the elevator according to the present embodiment from the deployed state. First, the operator loosens the butterfly screw 42 and moves the moving crosspiece 31 toward the second upper crosspiece 27b (step S21). As a result, a predetermined space 34 is formed in the middle of the upper crosspiece 27 in the longitudinal direction.

[0058] Next, the operator rotates the reinforcing connection 14 in a direction approaching the upper crosspiece 21 about the rotation fulcrum 75, and stores the reinforcing connection 14 so as to overlap the upper crosspiece 21 (step S22).

[0059] Next, the operator stores the rear fence 13 (step S23). When storing the rear fence 13, the operator first releases the connection state between the left rear fence 51 and the right rear fence 52 using the connection plate 61 and the butterfly screws 63, 72. Next, the operator rotates the left rear fence 51 in a direction approaching the upper crosspiece 21 about the rotation fulcrum 60, and overlaps the left rear fence 51 inside the left fence 11. Also, the operator rotates the right rear fence 52 in a direction approaching the upper crosspiece 27 about the rotation fulcrum 70, and overlaps the right rear fence 52 inside the right fence 12. As a result, the rear fence 13 can be stored.

[0060] Next, the operator gets off from the upper surface 15a of the car 15 (step S24). Next, the operator pulls up the lock member 82b and tilts the right fence 12 inward together with the support column 16 (step S25).

[0061] Next, the operator pulls up the lock member 82a and tilts the left fence 11 inward together with the support column 16 (step S26). At this time, the left fence 11 is overlapped on the right fence 12. Also, when the left fence 11 is tilted inward, the output signal of the detection sensor 85 becomes on (step S27). Thus, as shown in FIG. 8, the cage upper safety fence 10 is in a folded state.

[0062] Here, as shown in FIGS. 13 and 14, a pair of left and right guide devices 87 are installed on the upper surface 15a of the car 15. The pair of guide devices 87 are devices having a guide function for raising and lowering the car 15 along a pair of left and right guide rails 86. The guide device 87 is arranged to protrude outside the car 15 so that a part of the guide device 87 engages with the guide rail 86. The guide device 87 is an example of the equipment above the car installed on the car 15. Further, as shown in FIG. 14, in the depth direction of the car 15, the pair of guide rails 86 are arranged at positions separated by a sufficient distance from the two columns 16. Therefore, in a state where the overhead safety fence 10 is deployed, the overhead safety fence 10 does not interfere with the guide device 87.

[0063] Note that the equipment above the car is not limited to the above-described guide device 87. For example, the equipment above the car may be a stopper mechanism that restricts the vertical movement of the car 15. The stopper mechanism is a mechanism that prevents the car 15 from moving in the vertical direction even when the brake of the hoisting machine is released for elevator maintenance and inspection. The stopper mechanism includes a stopper pin. A bracket is fixed to the guide rail 86. The stopper pin is inserted into the hole of the bracket outside the car 15, thereby restricting the vertical movement of the car. Here, as an example of the equipment above the car, the guide device 87 and the stopper mechanism are mentioned, but other equipment above the car may also be the target equipment for interference avoidance. In the present embodiment, the case where the equipment above the car that is the target of interference avoidance is the guide device 87 will be described as an example.

[0064] As shown in FIGS. 15 and 16, when the overhead cage safety fence 10 is in a folded state, the upper rail 27 of the right fence portion 12 may interfere with the guide device 87 at the P portion (see FIG. 15). In contrast, in the overhead cage safety fence 10 according to the present embodiment, the upper rail 27 has a split structure, and the movable rail portion 31 is moved in a direction to open a predetermined space 34, so that the overhead cage safety fence 10 can be folded. Then, as shown in FIG. 16, in a state where the overhead cage safety fence 10 is folded, the guide device 87 is arranged within the predetermined space 34. Therefore, the upper rail 27 of the right fence portion 12 does not interfere with the guide device 87 (see FIG. 8). Thus, according to the present embodiment, even when a large height dimension of the overhead cage safety fence 10 is ensured, interference between the guide device 87 and the overhead cage safety fence 10 can be avoided.

[0065] <Modification example, etc.> Note that the present invention is not limited to the above-described embodiments and includes various modification examples. For example, in the above-described embodiments, the present invention has been described in detail for easy understanding of the content, but the present invention is not necessarily limited to having all the configurations described in the above-described embodiments. Also, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Further, it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Also, for a part of the configuration of each embodiment, it is possible to delete this, add another configuration, or replace it with another configuration.

[0066] For example, in the above embodiment, when the safety fence 10 on the car is folded, since the left fence part 11 is stacked on the right fence part 12, a moving rail part 31 is provided on the upper rail 27 of the right fence part 12 so that the upper rail 27 of the right fence part 12 does not interfere with the guide device 87. However, the present invention is not limited to this. For example, although not shown in the drawings, when the right fence part 12 is stacked on the left fence part 11 when the safety fence 10 on the car is folded, a moving rail part 31 may be provided on the upper rail 21 of the left fence part 11 so that the upper rail 21 of the left fence part 11 does not interfere with the guide device 87. Also, when the height dimension of the guide device 87 becomes large, it is conceivable that not only the upper rail 27 of the right fence part 12 but also the upper rail 21 of the left fence part 11 will interfere with the guide device 87. In that case, by providing the moving rail part 31 on both the upper rail 27 of the right fence part 12 and the upper rail 21 of the left fence part 11, interference between the safety fence 10 on the car and the guide device 87 can be avoided.

Explanation of Signs

[0067] 10…Safety fence on car, 11…Left fence part, 12…Right fence part, 13…Rear fence part, 14…Reinforcing connection, 15…Car, 16…Support column, 16a…Upper support column part, 16b…Lower support column part, 17…Connection part, 20…Guard member, 21…Upper rail, 22…Middle rail, 23…Vertical rail, 24…Auxiliary vertical rail, 27…Upper rail, 28…Middle rail, 29…Vertical rail, 30…Auxiliary vertical rail, 31…Moving rail part, 32…Auxiliary middle rail, 33…Second vertical rail, 34…Space, 35…Notch part, 36…Guide groove, 37…Guide fulcrum part, 42…Butterfly screw, 55…Upper rail, 56…Middle rail, 57…Vertical rail, 58…Auxiliary vertical rail, 59…Connecting vertical rail, 87…Guide device (equipment on car), F…Platform side

Claims

1. A cage top safety fence that is provided with a left fence portion disposed on the left side when viewed from the landing side of the elevator, a right fence portion disposed on the right side when viewed from the landing side, and a rear fence portion connecting the left fence portion and the right fence portion, and is installed foldably on top of the elevator car, wherein the left fence portion and the right fence portion each have an upper rail, and among the upper rails of the left fence portion and the upper rail of the right fence portion, at least one upper rail is divided so as to form a predetermined space in the middle of the length direction of the upper rail, and has a movable rail portion that is movable in the length direction of the upper rail so as to open and close the predetermined space. When the movable rail portion is moved in the direction of opening the predetermined space to fold the cage top safety fence, equipment on top of the car is arranged within the predetermined space A cage top safety fence for an elevator.

2. Comprising a plurality of columns that support the left fence portion and the right fence portion, the left fence portion and the right fence portion each have a middle rail disposed below the upper rail, and a vertical rail that connects the upper rail and the middle rail between the plurality of columns The cage top safety fence for an elevator according to Claim 1.

3. The rear fence portion has an upper rail and a middle rail, Among the left fence portion, the right fence portion, and the rear fence portion, at least one of the fence portions has an auxiliary vertical rail that protrudes downward from the middle rail The cage top safety fence for an elevator according to Claim 2.

4. An auxiliary middle rail is disposed between the upper rail having the movable rail portion and a middle rail disposed below the upper rail The cage top safety fence for an elevator according to Claim 2.

5. A second vertical rail is disposed between the auxiliary middle rail and the middle rail The cage top safety fence for an elevator according to Claim 4.

6. Each of the plurality of columns has an upper column portion, a lower column portion, and a connecting portion that connects the lower end of the upper column portion and the upper end of the lower column portion The cage top safety fence for an elevator according to Claim 2.

7. Among the left fence portion, the right fence portion, and the rear fence portion, a guard member that obstructs an operator from gripping the rail is attached to a predetermined rail The cage top safety fence for an elevator according to Claim 1.

8. An elevator comprising a car and a car top safety fence that is foldably installed above the car, wherein the car top safety fence includes a left fence portion disposed on the left side when viewed from the landing side of the elevator, a right fence portion disposed on the right side when viewed from the landing side, and a rear fence portion connecting the left fence portion and the right fence portion. The left fence portion and the right fence portion each have an upper rail. Among the upper rails of the left fence portion and the upper rail of the right fence portion, at least one of the upper rails is divided to form a predetermined space in the middle of the length direction of the upper rail, and has a movable rail portion that is movable in the length direction of the upper rail so as to open and close the predetermined space. When the movable rail portion is moved in the direction of opening the predetermined space to fold the car top safety fence, the car top equipment is arranged within the predetermined space. Elevator.

Images