Pit Ladder Device

Abstract

To provide a pit ladder device capable of installing a ladder at a use position with lesser burden than the prior arts.SOLUTION: A pit ladder device 100 includes an interlocking part 20 and a ladder part 10. The interlocking part 20 is connected to landing doors 91a, 91b of a lowermost floor at which an elevator device is provided and operated using the opening / closing of the landing doors 91a, 91b as driving force. The ladder part 10 is connected to the interlocking part 20 and moved to a use position where an operator uses the ladder part interlockingly with the opening operation of the landing doors 91a, 91b and moved to a storage position interlockingly with the closing operation of the landing doors 91a, 91b.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a pit ladder system for installation in a hoistway wall of an elevator system. [Background technology]

[0002] The lowest part of the elevator shaft is called the pit. Various equipment, including buffers, are installed in this pit. Maintenance personnel who perform maintenance and inspection of such equipment must descend from the landing on the lowest floor to the pit using a ladder installed in the pit.

[0003] Patent document 1 discloses a pit ladder device that stores a ladder under the threshold of a landing when not in use, and when in use, a maintenance worker can rotate the ladder to place it in a usable position. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-108112 A Summary of the Invention [Problem to be solved by the invention]

[0005] The above-mentioned pit ladder system requires a maintenance person to rotate the ladder in order to place it in the position for use.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide a pit ladder device that allows the ladder to be set up in a usage position with less effort than conventional methods. [Means for solving the problem]

[0007] The pit ladder device according to the present disclosure is connected to a landing door on the lowest floor of a building equipped with an elevator device, and includes an interlocking unit that operates using the opening and closing of the landing door as a driving force, and a pit ladder device connected to the interlocking unit,It can be slid in the opening and closing direction of the landing door, The ladder section is adapted to move to a position for use by an operator in conjunction with the opening operation of the landing door, and to move to a stored position in conjunction with the closing operation of the landing door. Effect of the Invention

[0008] According to the present disclosure, a pit ladder device can be provided that allows the ladder to be set up in a usage position with less effort than conventional methods. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a schematic diagram of a hoistway viewed from above with the landing doors in a closed state in the first embodiment. [Diagram 2] FIG. 2 is a schematic diagram of a hoistway viewed from above with the landing doors in a closed state in the first embodiment. [Diagram 3] FIG. 2 is a front view of the pit ladder device when the landing door is in a closed state in embodiment 1. [Figure 4] FIG. 2 is a front view of the pit ladder device when the landing door is in a closed state in embodiment 1. [Diagram 5] 4 is an enlarged view of a lower roller in the first embodiment. FIG. [Figure 6] 13 is an enlarged view of a connection portion when the car is not parked at the lowest floor in the first embodiment. FIG. [Figure 7] 1 is an enlarged view of a connection portion when the car is stopped at the lowest floor in the first embodiment. FIG. [Figure 8] FIG. 2 is a right side view of the pit ladder device in the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Embodiment 1 The pit ladder device 100 according to the first embodiment will be described below with reference to the drawings. First, an overview of this embodiment will be described with reference to Figs. 1 and 2. The same reference numerals in each drawing represent the same or equivalent configurations. Figs. 1 and 2 are schematic diagrams of a hoistway 200 portion of the lowest floor of a building equipped with an elevator device, viewed from above.

[0011] Fig. 1 is a diagram showing the landing doors 91a and 91b in a door-closed state, and Fig. 2 is a diagram showing the landing doors 91a and 91b in an open state. The landing doors 91a and 91b are the left and right landing doors, respectively, when viewed from inside the elevator shaft 200. In the following description, when there is no need to distinguish between them or when both are indicated, they are referred to as landing doors 91.

[0012] In Figures 1 and 2, ladder section 10 represents the ladder portion of the pit ladder device 100, which will be described later. Also, car position 201 shown by dotted lines in Figures 1 and 2 is the car stop position when the car of the elevator device stops at the lowest floor. Both Figures 1 and 2 show a state in which the car is not stopped at the lowest floor.

[0013] As shown in Fig. 1, when the landing door 91 is in a closed state, the ladder unit 10 is stored in a storage position, which is a position different from the car position 201. Then, when the landing door 91 is in an open state, the ladder unit 10 moves to a usage position in front of the landing where an operator can use it, as shown in Fig. 2. As will be explained in detail later, when the car is parked at the lowest floor, the ladder unit 10 does not move and remains stored in the storage position even if the landing door 91 is in an open state.

[0014] Next, the configuration of the pit ladder device 100 will be described in detail with reference to Figures 3 and 4. Figures 3 and 4 are front views of the pit ladder device 100 seen from inside the elevator shaft in the door-closed state and the door-open state shown in Figures 1 and 2, respectively.

[0015] The pit ladder device 100 comprises a ladder section 10 which is a ladder, and a linkage section 20 which moves the ladder section 10 in conjunction with the opening and closing of the landing door 91, and is provided below the landing threshold 92 which is the threshold of the landing door 91.

[0016] The interlocking unit 20 is connected to a landing door 91, which is the landing door on the lowest floor of the building in which the elevator device is installed, by mounting brackets 93a, 93b, which will be described later, and operates using the opening and closing of the landing door 91 as a driving force, and has pulleys 21a, 21b and a rope 22.

[0017] Pulleys 21a, 21b are provided on the left and right sides of the drawing, which is the opening and closing direction of landing door 91, for a total of two. Specifically, one is provided on each lower part of both ends of landing threshold 92. The left side of the drawing is pulley 21a, and the right side is pulley 21b. In the following description, when there is no need to distinguish between them or when both are referred to, they are referred to as pulley 21.

[0018] The rope 22 is connected to the landing door 91 by attachments 93a and 93b, and is wound around both of the two pulleys 21. The rope 22 is also looped, and in this embodiment, the attachment 93a is attached to the upper side of the rope 22, and the attachment 93b is attached to the lower side. In the following description, the attachment 93a and the attachment 93b are referred to as the attachment 93 when there is no distinction between them or when both are referred to.

[0019] The mounting metal 93a is attached to the landing door 91a, and pulls the upper side of the rope 22 to the left side of the paper when the landing door 91 opens, and pulls the upper side of the rope 22 to the right side of the paper when the landing door 91 closes. The mounting metal 93b is attached to the landing door 91b, and pulls the lower side of the rope 22 to the right side of the paper when the landing door 91 opens, and pulls the lower side of the rope 22 to the left side of the paper when the landing door 91 closes.

[0020] The ladder section 10 is connected to the interlocking section 20 and is a ladder that moves to a position in use by an operator or to a stored position in conjunction with the opening and closing operation of the landing door 91, and has a lower roller 11, a connection section 12, and an upper roller 10a not shown in Figures 3 and 4.

[0021] The lower roller 11 is provided at the lower end of the ladder section 10, and rolls along a guide 94 installed at the bottom of the hoistway 200. FIG.

[0022] Next, the connection part 12 will be described in detail with reference to Fig. 6 to Fig. 8. Fig. 6 is an enlarged view of the connection part 12 when the car is not parked at the lowest floor. Fig. 7 is an enlarged view of the connection part 12 when the car is not parked at the lowest floor. Fig. 8 is a view of the connection part 12 shown in Fig. 6 when the car is not parked at the lowest floor, as viewed from the right side of the paper of Figs. 3 and 4. Note that stopper 23b, which will be described later, is omitted in Fig. 8.

[0023] The two upper rollers 10a provided at the upper end of the ladder section 10 roll inside the landing threshold 92, and the shafts of the upper rollers 10a pass between the slits 92a in the landing threshold 92 and are connected to the main body of the ladder section 10.

[0024] The connecting portion 12 connects the ladder portion 10 to the rope 22, and includes two hooks 12a, a lever 12b, a roller 12c, and a weight 12d.

[0025] Hook 12a is for hooking rope 22, and in this embodiment, hooks the underside of rope 22. Hook 12a hooks the underside of rope 22 at its tip, and is rotatably attached to the main body of ladder section 10. In addition, the other side of hook 12a across the main body of ladder section 10 is connected to lever 12b.

[0026] In addition, stoppers 23a and 23b are provided on the rope 22 so as to sandwich the two hooks 12a. When looking at the landing door 91 from inside the elevator shaft 200, the stopper 23a is on the left and the stopper 23b is on the right. When there is no need to distinguish between these or when referring to both, they are referred to as stoppers 23.

[0027] The lever 12b operates the two hooks 12a. The roller 12c is installed on the upper part of the lever 12b. The cam 80 shown in Fig. 7 is a part attached to the car of the elevator device, and comes into contact with the roller 12c when the car stops at the lowest floor.

[0028] The weight 12d is placed on the opposite side of the lever 12b across the main body of the ladder section 10, and applies a downward force to the hook 12a due to gravity.

[0029] Next, the operation of the pit ladder device 100 in this embodiment will be described in detail. In the following description, the left and right sides refer to the left and right sides of the paper in Figures 3 and 4, and are the left and right sides when looking at the landing door 91 from inside the elevator shaft 200. First, the movement operation of the ladder section 10 will be described.

[0030] When no car is parked at the lowest floor, the hook 12a hooks the rope 22. The operation of releasing this hook will be described later.

[0031] When the landing door 91 performs an opening operation, the mounting metal 93 attached to the lower part of the landing door 91 moves and rotates the rope 22. Specifically, the mounting metal 93a attached to the landing door 91a is attached to the upper side of the rope 22, and therefore moves the upper side of the rope 22 to the left. In addition, the mounting metal 93b attached to the landing door 91b is attached to the lower side of the rope 22, and therefore moves the lower side of the rope 22 to the right.

[0032] As the rope 22 moves, the stopper 23a provided on the underside of the rope 22 presses the hook 12a to the right. As the hook 12a is pressed, the lower roller 11 and upper roller 10a of the ladder section 10 rotate, and the ladder section 10 moves to the right. Then, when the landing door 91 is in the open state, the ladder section 10 is placed in the use position.

[0033] When the landing door 91 performs a door-closing operation, the mounting bracket 93 attached to the lower part of the landing door 91 moves in the direction opposite to the door-opening operation, causing the rope 22 to rotate in the direction opposite to the door-opening operation.

[0034] As the rope 22 moves, the stopper 23b provided on the underside of the rope 22 presses the hook 12a to the left. As the hook 12a is pressed, the lower roller 11 and the upper roller 10a of the ladder section 10 rotate, and the ladder section 10 moves to the left. Then, when the landing door 91 is in the door-closed state, the ladder section 10 is placed in the stored position.

[0035] Next, the operation of releasing the hook 12a from the rope 22 and the operation of the hook 12a re-hooking the rope 22 will be described.

[0036] When the elevator car stops at the lowest floor, the cam 80 attached to the car comes into contact with the roller 12c. When the cam 80 comes into contact with the roller 12c, the lever 12b is operated. Specifically, the lever 12b is pressed downward, the hook 12a is lifted, and the hooking on the rope 22 is released.

[0037] When the hook 12a is no longer hooked on the rope 22, even if the landing door 91 performs an opening operation, the hook 12a is not pressed by the stopper 23, and the ladder section 10 does not move.

[0038] On the other hand, when the car of the elevator apparatus moves from the state where it is stopped at the lowest floor, the cam 80 separates from the roller 12c and the pressure on the lever 12b is released. Then, the hook 12a is caught on the rope 22 again due to the downward force of the weight 12d on the hook 12a.

[0039] As described above, according to this embodiment, it is possible to provide a pit ladder device 100 that allows the ladder to be set up in a position of use with less effort than in the past. More specifically, the ladder section 10 of the pit ladder device 100 can be moved automatically without the worker having to move the ladder himself.

[0040] Furthermore, the ladder section 10 of this embodiment has a connection section 12 that is connected to the interlocking section 20 when the car is not parked at the lowest floor, and is not connected to the interlocking section 20 when the car is parked at the lowest floor. Therefore, it is possible to prevent the size of the elevator shaft 200 from increasing while preventing contact between the car and the ladder section 10.

[0041] A detailed explanation will be given. A ladder provided on the wall of the hoistway 200 needs to be spaced apart from the wall to allow workers to place their feet on it. Also, when the car moves to the lowest floor, the pit ladder needs to be spaced apart from the car's stopping position to avoid interference between the pit ladder and the car. Therefore, providing a ladder on the wall of the hoistway 200 leads to an increase in the size of the hoistway 200.

[0042] According to this embodiment, when the car is not parked at the lowest floor and the connection part 12 is connected to the interlocking part 20, the ladder part 10 moves to the use position when the landing door 91 is in the door-open state. On the other hand, when the car is parked at the lowest floor and the connection part 12 is not connected to the interlocking part 20, the ladder part 10 does not move to the use position when the landing door 91 is in the door-open state, so there is no contact with the car. In other words, when the ladder part 10 is in the use position, the car does not park at the lowest floor. Therefore, when the ladder part 10 is in the use position, there is no need to ensure both the distance between the wall and the ladder part 10 and the distance between the parking position of the car and the ladder part 10, and the size of the elevator shaft 200 can be prevented from increasing.

[0043] In addition, since the interlocking part 20 of this embodiment is composed of the rope 22, it has a simpler structure and is less expensive than the interlocking part 20 composed of other mechanical structures. In addition, the connecting part 12 of this embodiment also uses the hook 12a to connect to and disconnect from the interlocking part 20, so it has a simpler structure and is less expensive than the interlocking part 20 composed of other mechanical structures.

[0044] Furthermore, since the ladder section 10 has lower rollers 11 at its lower end, the ladder section 10 can be moved smoothly from the stored position to the use position.

[0045] Although the embodiment has been described above, the present disclosure is not limited to this embodiment, and modifications will be described below.

[0046] In the embodiment, the interlocking section 20 is a structure using a rope 22, but in order to solve the problem, any structure that can move the ladder section 10 using the opening and closing of the landing door 91 as a driving force may be used, and for example, it may be configured with another mechanical structure.

[0047] In the embodiment, the landing door 91 is configured with the landing door 91a that moves to the left and the landing door 91b that moves to the right during the door opening operation, but the pit ladder device 100 in the present disclosure can be applied to landing doors of other configurations. For example, in a configuration in which both of the two landing doors move to the right, the mounting brackets 93 may be attached to the lower parts of both of the landing doors, and both may be attached to the lower side of the rope 22, as with the mounting bracket 93b in the embodiment. Also, only one mounting bracket 93 may be used.

[0048] In the embodiment, the use position of the ladder section 10 is in front of the landing, but the use position may be any position that makes it easier for an operator to use the ladder to descend to the pit than the stored position. For example, the use position may be the position illustrated as the stored position in Figure 3 or Figure 4, and the ladder may be moved from a stored position that is further away from the landing. [Explanation of symbols]

[0049] 10 ladder section, 10a upper roller, 11 lower roller, 12 connection section, 12a hook, 12b lever, 12c roller, 12d weight, 20 interlocking section, 21, 21a, 21b pulley, 22 rope, 23, 23a, 23b stopper, 80 cam, 91, 91a, 91b landing door, 92 landing threshold, 92a slit, 93, 93a, 93b mounting bracket, 94 guide, 100 pit ladder device, 200 elevator shaft, 201 cage position

Claims

1. An interlocking unit that is connected to a landing door on the lowest floor of a building in which the elevator device is installed and operates using the opening and closing of the landing door as a driving force; a ladder section connected to the interlocking section, slidably movable in the opening and closing direction of the landing door, which moves to a use position used by an operator in conjunction with a door-opening operation of the landing door and moves to a storage position in conjunction with a door-closing operation of the landing door; Pit ladder device equipped with.

2. The ladder portion is a connecting portion that is connected to the interlocking portion when the car of the elevator device is not stopped at the lowest floor and that is not connected to the interlocking portion when the car is stopped at the lowest floor; 2. The pit ladder apparatus of claim 1.

3. The interlocking portion is At least two pulleys provided in the opening and closing direction of the landing door; A looped rope connected to the landing door and hung on both of the two pulleys; having The connection portion is A hook for hanging the rope; a lever that is operated when a car of the elevator apparatus is stopped at the lowest floor to release the rope from being caught by the hook; The following has been established:

3. The pit ladder apparatus of claim 2.

4. The ladder section has a lower roller at its lower end. A pit ladder arrangement according to any one of claims 1 to 3.

5. An interlocking unit that is connected to a landing door on the lowest floor of a building in which the elevator device is installed and operates using the opening and closing of the landing door as a driving force; A ladder unit connected to the interlocking unit, which moves to a use position used by an operator in conjunction with a door opening operation of the landing door and moves to a storage position in conjunction with a door closing operation of the landing door; Equipped with The interlocking portion is At least two pulleys provided in the opening and closing direction of the landing door; A looped rope connected to the landing door and the ladder section and hung on both of the two pulleys; Pit ladder device having.

6. An interlocking unit that is connected to a landing door on the lowest floor of a building in which the elevator device is installed and operates using the opening and closing of the landing door as a driving force; Connected to the interlocking portion, A ladder unit that moves to a use position used by an operator in conjunction with a door opening operation of the landing door and moves to a storage position in conjunction with a door closing operation of the landing door; Equipped with The ladder portion is a connection part that is connected to the interlocking part when the car of the elevator device is not stopped at the lowest floor and that is not connected to the interlocking part when the car is stopped at the lowest floor, The interlocking portion is At least two pulleys provided in the opening and closing direction of the landing door; A looped rope connected to the landing door and hung on both of the two pulleys; having The connection portion is A hook for hanging the rope; a lever that is operated when a car of the elevator apparatus is stopped at the lowest floor to release the rope from being caught by the hook; The following has been established: Pit ladder equipment.

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