JP2016003104A - Pit ladder device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve both improving workability in the case of going down to a pit from a landing and eliminating necessity of arrangement between a pit wall surface and a car when unused, in a pit ladder device for an elevator.SOLUTION: A pit ladder device 10 for an elevator includes: a floor fixing member 20 fixed at a pit floor surface 16; a first rotary member 30 supported in a manner rotatable around a first axis L1 in a horizontal direction with respect to the floor fixing member 20; a second rotary member 40 supported in a manner rotatable with respect to the first rotary member 30 around a second axis L2; a ladder body 50 in which one end side is fixed to the second rotary member 40, and which can move between an unused time position tilted toward a pit depth side from a landing 15 side on the pit floor surface 16, and a using time position facing a predetermined direction with respect to the landing by rotating around the first axis L1, the second axis L2; and pull-up means 60 connected to the ladder body 50.

Description

  The present invention relates to an elevator pit ladder apparatus that is installed in a lower pit of an elevator hoistway and is used for raising and lowering between a landing and a pit.

  2. Description of the Related Art Conventionally, when an operator gets down from a landing side to a pit for inspection or repair of an elevator, a pit ladder device is stood on the landing side. In this case, when the worker moves from the landing to the pit ladder device, the body is rotated 180 degrees to descend backward. For example, the worker changes the posture so as to face the outside of the pit while turning around the ladder device from the posture facing the inside of the pit at the position of the landing.

  In Patent Document 1, among the two vertical bars constituting the ladder, the position of the ladder close to the pit wall centered on one vertical bar and the other of the two vertical bars A pit ladder device is described that is configured to be able to rotate and move a vertical bar away from the pit wall to a position in use.

  Patent Document 2 includes an upper ladder member and a lower ladder member that is foldably connected to the lower end portion of the upper ladder member. A pit ladder is described which is stretched in a straight line and leans against the wall of the pit.

JP 2003-327372 A JP 2003-192253 A

  When a pit ladder device is stood on the landing side and an operator turns 180 degrees from the landing to the ladder device and gets off, it gets down backward, so it is difficult to check the feet. As a result, the worker needs to get off carefully, has a long working time, and there is room for improvement in terms of improving workability. On the other hand, in the ladder device described in Patent Document 1, there is a possibility that an operator can easily get off because it is separated from the pit wall surface when used, but when the ladder device is not used, the ladder device is in a state along the pit wall surface, and the ladder device is arranged. In addition, it is necessary to enlarge the space between the elevator car and the pit wall. In both Patent Documents 1 and 2, means for improving workability when getting off the landing from the landing and making it unnecessary to arrange between the pit wall surface and the car when not in use Is not disclosed.

  The object of the present invention is to improve workability when getting off the landing from the landing in the pit ladder device for an elevator and to make it unnecessary to arrange between the pit wall surface and the car when not in use. It is to be.

  An elevator pit ladder apparatus according to the present invention includes a floor fixing member fixed to a pit floor surface of an elevator hoistway, and a first fixed to the floor fixing member so as to be rotatable about a first axis in a horizontal direction. A rotating member and a second axis included in a plane orthogonal to the first axis are supported so as to be rotatable with respect to the first rotating member, and the first rotating member is rotated to a predetermined position. A ladder main body having a second rotating member whose second axis is directed in the vertical direction, two pillars and a plurality of steps connected between the pillars, one end of which is fixed to the second rotating member. And when it is not used, it is tilted from the landing side toward the pit back side on the pit floor surface, and is rotated by rotating around the first axis and rotating around the second axis. When used in a predetermined orientation with respect to the platform It comprises a ladder body which is movable in a position, and a pulling means used from the landing connected to the ladder body to raise the other end of the ladder body.

  According to the elevator pit ladder apparatus of the present invention, it is possible to improve workability when getting off the landing from the landing and to eliminate the need for disposition between the pit wall surface and the car when not in use. Can be planned. Furthermore, according to the present invention, the ladder device can be easily lifted from the landing side by the lifting means, and the ladder device can be easily moved to the position at the time of use, so that installation workability can be improved.

1 is an overall configuration diagram of an elevator pit ladder apparatus according to an embodiment of the present invention. It is the figure seen from the upper part of FIG. It is A arrow directional view of FIG. FIG. 4 is a view taken in the direction of arrow B in FIG. 3. It is the C section enlarged view of FIG. It is the figure which looked at the landing fixing | fixed part which comprises the ladder apparatus of FIG. 5 from upper direction. It is a figure which takes out and shows the pressing member which comprises the boarding point fixing | fixed part of FIG. It is a figure which shows the position when the pit ladder apparatus for elevators of embodiment which concerns on this invention is not used. It is a figure which shows a 1st operation | work in the installation work which moves the pit ladder apparatus for elevators of embodiment which concerns on this invention to the installation position at the time of use. It is a figure which shows a 2nd operation | work in the installation work which moves the pit ladder apparatus for elevators of embodiment which concerns on this invention to the installation position at the time of use. It is a figure which shows the state in which an operator gets down to a pit using the pit ladder apparatus for elevators of embodiment which concerns on this invention. It is a figure which shows the installation operation | movement which moves the pit ladder apparatus for elevators of a comparative example to the installation position at the time of use. It is a figure which shows the state in which an operator gets down to a pit using the pit ladder apparatus for elevators of a comparative example. It is a figure which shows another example of the pit ladder apparatus for elevators of embodiment which concerns on this invention. It is the figure which looked at the landing fixing | fixed part which comprises the ladder apparatus of FIG. 14 in the arrow (alpha) direction of FIG. It is a disassembled perspective view in the lower part of the ladder apparatus of FIG. FIG. 16 is an exploded perspective view of the landing fixing portion of FIG. 15.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The materials, shapes, quantities, and the like described below are exemplifications for explanation, and can be appropriately changed according to the specifications of the elevator pit ladder apparatus 10. In the following description, identical elements are denoted by the same reference symbols in all drawings. In the description in the text, the symbols described before are used as necessary.

  FIG. 1 is an overall configuration diagram of an elevator pit ladder apparatus 10 according to the present embodiment, and FIG. 2 is a view as seen from above in FIG. The elevator is configured to include a car 12 (FIG. 8) that moves up and down in the hoistway 11. An operator 13 (FIG. 2) who checks or repairs an elevator may get down to a pit 14 provided at the lower part of the hoistway 11 to perform work. In this case, an elevator pit ladder device (hereinafter simply referred to as a ladder device) 10 is used for the operator 13 to move up and down between the landing 15 on the lowest floor and the pit floor 16.

  The ladder apparatus 10 includes a floor fixing member 20, a first rotating member 30, a second rotating member 40, a ladder main body 50, a lifting means 60 (FIG. 8), and a landing fixing portion 70. In FIG. 1 and FIG. 2, the drawing of the pulling means 60 is omitted.

  FIG. 3 is a view taken in the direction of arrow A in FIG. The floor fixing member 20 includes a plate portion 21 disposed in the horizontal direction, and two wall portions 22 that are integrally formed by bending upward at both ends in the length direction (the left-right direction in FIG. 3) of the plate portion 21. including. 4 is a view taken in the direction of arrow B in FIG. Each wall portion 22 has a circular fixed side hole 23 provided along the first axis L1 in the horizontal direction at one end portion in the width direction (the right end portion in FIG. 4). The plate portion 21 is fixed to the pit floor 16 with a bolt or the like (not shown). The floor fixing member 20 is formed of a metal such as steel (the same applies to a first rotating member 30 and a second rotating member 40 described later).

  The first rotating member 30 is provided on the upper side of the floor fixing member 20, and is integrally formed by bending at a right angle at both ends of the second plate portion 31 and the length direction (left-right direction in FIG. 3) of the second plate portion 31. Two second wall portions 32 to be formed. The 2nd board part 31 has the circular 1st rotation side hole 33 penetrated in the thickness direction (up-down direction of FIG. 3) which is the direction of the 2nd axis | shaft L1. The two second wall portions 32 are arranged inside each wall portion 22 so as to face the two wall portions 22. Each second wall portion 32 has a circular second rotation side hole 34 provided along the first axis L1.

  Each of the second wall portions 32 has a first axis with respect to each wall portion 22 by two first pins 80 inserted into the fixed side hole 23 of the wall portion 22 and the second rotation side hole 34 of the second wall portion 32. It is supported so as to be rotatable around L1. An intermediate portion in the length direction of each first pin 80 is formed in a cylindrical shape.

  Further, a retaining portion 81 is integrally provided at both ends of each first pin 80. The retaining portion 81 is formed by a nut screwed to the end of the first pin 80 or a C-shaped retaining ring that is latched in a retaining groove formed on the entire periphery of the end of the first pin 80. May be. The retaining portion 81 prevents the first pin 80 from coming out of the fixed side hole 23 and the second rotation side hole 34. As a result, the first rotating member 30 is supported so as to be rotatable about the first axis L1 with respect to the floor fixing member 20, and a position where both side surfaces of the second plate portion 31 face in a substantially horizontal direction and a position in which the second plate portion 31 faces in a vertical direction Can be rotated between the two. The diameters of the fixed side hole 23 and the second rotation side hole 34 and the diameters of the first pins 80 may be substantially the same.

  In order to prevent the first rotating member 30 from rotating from the position where the second plate portion 31 of the first rotating member 30 faces in the up-down direction toward the opposite horizontal direction, the first rotation is performed. A stopper (not shown) is provided between the member 30 and the floor fixing member 20. A bearing may be provided between the fixed side hole 23 and the second rotation side hole 34 and the first pin 80.

  The second rotating member 40 includes a disc portion 41 and a rectangular plate-like ladder coupling portion 42 fixed to the upper side of the disc portion 41, and is disposed so as to overlap the upper side of the second plate portion 31. The ladder coupling portion 42 is fixed to one end side (lower end side in FIG. 1) of two lower column portions 55 constituting a ladder body 50 described later in a direction orthogonal to the length direction of each lower column portion 55. The A rectangular plate portion may be used instead of the circular plate portion 41, and the lower rectangular plate portion and the upper ladder coupling portion 42 may be formed by an integral member. The second rotating member 40 is formed with a third rotating side hole 43 that penetrates in the thickness direction (vertical direction in FIG. 3).

  A second pin 82 is inserted into the first rotation side hole 33 of the first rotation member 30 and the third rotation side hole 43 of the second rotation member 40. The diameters of the first rotation side hole 33 and the third rotation side hole 43 and the diameter of the second pin 82 may be substantially the same. A middle portion in the length direction of the second pin 82 is formed in a columnar shape, and a retaining portion 83 is integrally provided at both end portions in the length direction similarly to the retaining portion 81 of the first pin 80. Accordingly, the second rotating member 40 is supported so as to be rotatable with respect to the first rotating member 30 about the second axis L2 in the direction of the third rotation side hole 43. The second axis L2 is included in a plane perpendicular to the first axis L1, and rotates within a predetermined angle range together with the first rotating member 30 when the first rotating member 30 rotates about the first axis L1. The second axis L2 faces in the up-down direction in a state where the first rotating member 30 is rotated to a position where both side surfaces of the second plate portion 31 face in the up-down direction as the predetermined position (position shown in FIG. 3). The position shown in FIG. 3 in this case is the position when the ladder device 10 is used. A bearing may be provided between the first rotation side hole 33 and the third rotation side hole 43 and the second pin 82. A thrust bearing may be provided between the second rotating member 40 and the first rotating member 30.

  Returning to FIG. 1, the ladder body 50 includes an upper member 51 and a lower member 52 connected to the lower side of the upper member 51. The upper member 51 has a plurality of upper steps 54 connected between two parallel upper pillars 53. Similarly to the upper member 51, the lower member 52 has a plurality of lower steps 56 connected between the two lower column portions 55. The interval between the two upper column portions 53 is smaller than the interval between the two lower column portions 55. The lower part of the upper column part 53 is arranged inside the upper part of the lower column part 55, and the upper part of the lower column part 55 is connected to the lower part of the upper column part 53 so as to be foldable around a horizontal support shaft 57. . In order to prevent the upper member 51 and the lower member 52 from bending to the opposite side after being unfolded in a straight line from the folded state, the lower portion of the upper member 51 and the upper portion of the lower member 52 are A stopper (not shown) is provided between them.

  As shown in FIG. 8 to be described later, such a ladder main body 50 is placed on the pit floor 16 from the landing 15 side toward the back side of the pit 14 (right side in FIG. 8) when not in use. As shown in FIG. 2, when being used in a predetermined direction set in advance with respect to the landing 15 by being rotated about the first axis L <b> 1 and rotating about the second axis L <b> 2. It is possible to move to the position. Here, “being tilted toward the back side of the pit 14” means that the floor fixing member 20 is tilted with respect to the ladder body 50 so as to be positioned on the landing 15 side (left side in FIG. 8). Further, the “predetermined direction” means that the length direction of the steps 54 and 56 of the ladder body 50 (the left-right direction in FIG. 1) is the length direction of the sill portion 17 provided at the lower part of the landing 15 (on the paper surface of FIG. (Orthogonal direction). The sill part 17 has a linear sill groove 18 for guiding a lower part of an elevator landing door (not shown) on the upper surface of the tip part.

  As shown in FIG. 8, the pulling means 60 is formed by a rope, and the pulling means 60 is connected to the first hook 58 connected to one upper column part 53 on the other end side (the upper end side in FIG. 1) of the ladder body 50. One end is connected, and the other end of the lifting means 60 is connected to the second hook 19 fixed to the front end surface of the sill portion 17 provided in the peripheral portion of the landing 15. Thereby, the pulling means 60 is connected between the ladder body 50 and the periphery of the landing. As will be described later, the pulling means 60 is used by an operator pulling up the other end side (the upper end side in FIG. 1) of the ladder body 50 from the landing 15 side. The pulling means 60 may be made of a metal such as steel formed in a chain shape other than the rope, or a bar. Further, the pulling means 60 may be connected between the landing peripheral part and the ladder body 50, and an arbitrary position on the peripheral part of the landing and an arbitrary position on the other end (upper end in FIG. 1) side of the ladder main body 50. Both ends of the pulling means 60 may be connected to each other. For example, one end of the pulling means 60 may be bound while being inserted into a hole formed in one upper column part 53 of the ladder body 50.

  Returning to FIG. 1, the landing fixing portion 70 is provided to fix the ladder body 50 to the sill portion 17 constituting the landing 15. 5 is an enlarged view of a portion C in FIG. 1, and FIG. 6 is a view of the landing fixing portion 70 in FIG. 5 as viewed from above. The landing fixing portion 70 includes a main body portion 71, a pressing member 72, a fastening member 73, and a pin 74 that is a coupling member. The main body portion 71 is formed of a metal plate, and includes a plate portion 71a, an engagement plate portion 71b formed by bending the plate portion 71a at one end in the longitudinal direction (left end portion in FIG. 5), and a plate portion 71a. The other end portion in the length direction (right end portion in FIG. 5) includes two pin support portions 71d formed by bending the arm portion 71c protruding from both ends in the width direction so as to be rounded downward. The engagement plate portion 71 b engages with the threshold groove 18 of the landing 15. Each pin support portion 71d inserts and supports a pin 74 to be described later.

  The plate portion 71a has a rectangular ladder insertion portion 71e formed between the arm portions 71c at the other end in the length direction and a central portion in the width direction (vertical direction in FIG. 6) on the other end side in the length direction. And a notch 71f formed in the length direction.

  As shown in FIG. 7, the pressing member 72 includes a rectangular plate-shaped main body 72 a and a T-shaped portion 72 b formed to protrude from the upper end of the main body 72 a. A screw hole 72c penetrating in the thickness direction is formed in the main body 72a. A fastening member 73 described later is fastened to the screw hole 72c.

  The pressing member 72 is not cut into the main body portion 71 by inserting the lower portion of the T-shaped portion 72b into the notch 71f of the main body portion 71 with the upper surface of the T-shaped portion 72b engaged with the upper surface of the main body portion 71. It is supported so as to be movable along the direction of 71f. The upper portion of the T-shaped portion 72 b prevents the pressing member 72 from dropping from the main body portion 71. Further, when the landing fixing portion 70 is fixed to the sill portion 17, the pressing member 72 is guided so as to be movable in a direction in which the landing member 15 moves far and near.

  The fastening member 73 is formed of a bolt, and is fastened to the screw hole 72c of the pressing member 72 in a state of passing through the hole 71g formed in the engagement plate portion 71b. No thread portion is formed in the hole 71g. When the fastening member 73 is fastened to the screw hole 72c, the pressing member 72 moves in the direction indicated by the arrow β in FIG. 5, and the leading end portion of the sill portion 17 is sandwiched between the pressing member 72 and the engagement plate portion 71b. The landing fixing part 70 is fixed to the threshold part 17.

  In this state, the pin 74 is detachably coupled to the main body 71 to fix the ladder main body 50 to the main body 71. Specifically, with the ladder body 50 in the predetermined orientation shown in FIG. 5, one upper column 53 is inserted into the ladder insertion portion 71e, and a cylindrical pin 74 is inserted inside each pin support portion 71d. Supported. In this state, as shown in FIG. 6, the upper column portion 53 is sandwiched and fixed between the pin 74 and the ladder insertion portion 71e. Similar to the first pin 80 and the second pin 82 described with reference to FIG. 3, a retaining portion may be provided at both ends of the pin 74. In FIG. 6, the upper column portion 53 is shown as sand for easy understanding. Thereby, the ladder main body 50 is fixed to the landing fixing portion 70. Instead of the pin 74, a member having a different shape may be used as the coupling member. For example, the upper column portion 53 may be fixed between the plate member coupled to the main body 71 and the main body 71.

  On the other hand, when the ladder device 10 is not used, the pin 74 is extracted from each pin support portion 71d, and the fastening of the fastening member 73 of the landing fixing portion 70 with respect to the pressing member 72 is loosened, thereby pressing the pressing member 72 with the arrow β in FIG. The platform fixing part 70 is removed from the threshold part 17 by moving in the opposite direction. In this state, the ladder device 10 can be folded and laid on the pit floor 16.

  Next, a method of installing the ladder device 10 at a predetermined position during use and a use state of the ladder device 10 will be described with reference to FIGS. 8 to 11. First, the installation method of the ladder apparatus 10 is demonstrated. FIG. 8 shows the position of the ladder device 10 when not in use. In this case, the ladder main body 50 is folded around the support shaft 57 so that the upper member 51 overlaps the upper side of the lower member 52, and the overall length is shortened.

  When the operator 13 fixes the ladder body 50 to the landing 15, first, the elevator car 12 is stopped in a state where the elevator car 12 is moved above the landing 15 on the lowest floor, and then the ladder body 50 is lifted from the landing 15. Do work. In this case, as shown in FIG. 9, the operator 13 pulls the pulling means 60 connected to the ladder main body 50 as a first operation, and rotates the ladder main body 50 around the support shaft 57 to make a straight line. Start up while extending the shape. In this case, one end side of the ladder body 50 rotates around the first axis L1 (FIG. 1). In this case, the operator 13 can easily raise the ladder body 50 by moving the center of gravity of the body to the rear side. Then, as shown in FIG. 10, the worker 13 moves the ladder body 50 in the arrow γ direction around the second axis L <b> 2 (FIG. 1) in a state where the ladder body 50 is raised so as to extend in the vertical direction as the second work. The ladder main body 50 is rotated 90 degrees to rotate in a predetermined direction shown in FIGS. 1 and 2, and in this state, the ladder main body 50 is fixed to the sill portion 17 of the landing 15 using the landing fixing portion 70. Thereby, the ladder apparatus 10 is installed in the predetermined position at the time of use.

  Next, the usage state of the ladder device 10 will be described. FIG. 11 shows a state where the operator 13 gets down to the pit 14 using the ladder device 10. When the worker gets down to the pit 14, the worker moves from the landing 15 to the ladder body 50 installed in a predetermined direction. In this case, it is only necessary to move from the landing 15 to the ladder body 50 in a horizontal direction.

  According to the ladder device 10 described above, when the platform device 15 is moved from the landing 15 to the ladder device 10, the predetermined orientation of the ladder device 10 is set so that the feet can be easily confirmed, so that the work when getting off from the landing 15 to the pit 14 is performed. Can be improved. In this example, the “predetermined direction” is a direction in which the length direction of steps 54 and 56 is orthogonal to the length direction of the sill portion 17. In this case, the operator 13 moves from the landing 15 to the ladder device. When moving to 10, the angle of changing the direction of the body can be reduced. For this reason, the operator 13 can easily move to the ladder device 10 while checking his / her feet without taking an unreasonable posture. As long as the ladder body 50 can be stably fixed to the landing 15, the predetermined direction may be such that the length direction of the steps 54 and 56 is inclined with respect to the length direction of the sill portion 17.

  Further, when the ladder device 10 is not used, the ladder device 10 is located on the pit floor surface 16 so as to be tilted from the landing 15 side toward the back side of the pit 14, so that the pit wall surface H on the landing 15 side (FIG. 1). It is not necessary to arrange the ladder device 10 between the car and the car 12. In this case, the ladder device 10 is installed on the pit floor surface 16, but the space between the pit floor surface 16 and the lower surface of the car 12 is large, and it is necessary to enlarge this space only for the installation of the ladder device 10. Absent. As a result, it is possible to improve both workability when getting off from the landing 15 to the pit 14 and to make it unnecessary to dispose the ladder device 10 between the pit wall surface H and the car 12 when not in use. . Furthermore, since the ladder device 10 can be easily pulled up from the landing 15 side by the pulling means 60, the ladder device 10 can be easily moved to the position in use, and the installation workability can be improved.

  Moreover, since the ladder main body 50 includes the upper member 51 and the lower member 52 foldably connected to the lower portion of the upper member 51, the overall length of the ladder main body 50 can be reduced when not in use, and the installation space can be reduced. . In addition, the ladder main body 50 is good also as a structure by which the intermediate member including an intermediate | middle pillar part and an intermediate | middle step is connected between the upper side member 51 and the lower side member 52 so that folding is possible. The ladder body 50 may be configured to be unfoldable as shown in another example of FIG. 14 described later.

  12 to 13 show a ladder device 10a of a comparative example. In the ladder device 10a of the comparative example, the lower portion of the ladder body 50 is connected to the floor fixing member 20 fixed to the pit floor 16 so as to be rotatable around the first axis L1 in the horizontal direction. In the ladder main body 50, the upper member 51 and the lower member 52 are connected so as to be foldable as in the embodiment. When the ladder device 10a of the comparative example is installed at a predetermined position during use, the operator 13 pulls up the lifting means 60 connected to the end of the ladder body 50 as shown in FIG. In the raised state, it is leaned against the threshold 17 of the landing 15 as shown in FIG. In this state, the ladder body 50 is fixed to the sill portion 17 by engaging the L-shaped engaging portion 84 fixed to the ladder body 50 with the sill groove 18. In this state, as shown in FIG. 13, the worker 13 can get down to the pit 14 using the ladder device 10a, but when moving from the landing 15 to the ladder device 10a, the worker 13 rotates his body 180 degrees. Need to get back backwards. In this case, it is difficult for the operator 13 to confirm the feet, and thus the work time is long. According to the present embodiment, since the operator 13 can easily confirm the feet when moving from the landing 15 to the ladder body 50, such inconvenience does not occur.

  14 to 17 show another example of the present embodiment. FIG. 14 is a diagram illustrating another example of the ladder device 10. FIG. 15 is a view of the landing fixing portion 70 constituting the ladder device 10 as viewed in the direction of the arrow α in FIG. 16 is an exploded perspective view of the lower portion of the ladder device 10, and FIG. 17 is an exploded perspective view of the landing fixing portion 70 of FIG.

  In another example shown in FIG. 14, the ladder body 50 is formed by connecting a plurality of stepped portions 59 b having L-shaped cross sections to two parallel plate-like columnar portions 59 a, and is not formed so as to be foldable.

  As shown in FIG. 16, the floor fixing member 20 has two wall portions 25 protruding from the upper surfaces of both end portions in the length direction at one end portion in the width direction of the plate portion 24. The first rotating member 30 is fixed to the two second wall portions 36 projecting from the lower surfaces of both end portions in the length direction at one end portion in the width direction of the second plate portion 35 and the outer surface of each second wall portion 36. And a cylindrical shaft portion 37. Each shaft portion 37 is inserted into a circular fixed side hole 26 formed along the same first axis L <b> 1 with respect to the wall portion 25. Thus, the first rotating member 30 is supported by the floor fixing member 20 so as to be rotatable about the first axis L1. A rotation side hole (not shown) penetrating in the thickness direction along the second axis L2 is formed in an intermediate portion of the second plate portion 35.

  The second rotating member 40 is formed in a rectangular plate shape and is fixed to one end portion (the lower end portion in FIG. 14) of the ladder body 50. A second rotation side hole 44 in the thickness direction is formed in the middle portion of the second rotation member 40, and the second rotation member 40 is disposed above the first rotation member 30 via a plate-like circular member 85. The second pin 82 is inserted into the inside of the circular member 85, the rotation side hole, and the second rotation side hole 44, and disc-shaped retaining portions 83 are provided at both ends of the second pin 82. Thus, the second rotating member 40 is supported to be rotatable about the second axis L2 with respect to the first rotating member 30.

  Returning to FIG. 14, the ladder main body 50 is fixed to the sill portion 17 of the landing 15 by the landing fixing portion 70 in a state where the ladder main body 50 is rotationally moved in a predetermined direction. A pulling means 60 formed by a chain is connected between the sill portion 17 and the ladder body 50.

  The landing fixing part 70 includes a main body part 75, a pressing member 76, a damage prevention plate 77, a fastening member 73, and a pin 74. As shown in FIGS. 15 and 17, the main body portion 75 is made of metal, and an engagement plate portion 75 b formed at one end portion in the length direction of the plate portion 75 a (left end portion in FIGS. 15 and 17), and a plate A notch 75c formed in the middle direction of the portion 75a in the length direction (left and right direction in FIGS. 15 and 17) and a columnar shape provided in the other end portion in the length direction (right end portion in FIGS. 15 and 17) And a pin support portion 75d. The pin support portion 75d has a pin insertion hole 75e penetrating in the width direction (the arrow δ direction in FIG. 17).

  The pressing member 76 is formed in a rectangular plate shape with metal and has a main body portion 76b having a screw hole 76a penetrating in the thickness direction, and a bolt 76c screwed to the upper end portion. The threaded portion of the bolt 76c protrudes above the upper surface of the main body portion 76b, and the protruding portion is inserted into the notch 75c of the main body portion 75. The head portion of the bolt 76c is engaged with the upper surface of the plate portion 75a, thereby preventing the pressing member 76 from dropping off from the main body portion 75.

  The damage prevention plate 77 is formed in a rectangular plate shape with a low-rigidity material such as rubber or synthetic resin, and has a hole 77a into which the fastening member 73 is inserted at an intermediate portion. No threaded portion is formed in the hole 77a. The fastening member 73 inserted into the hole 75f of the engagement plate portion 75b and the hole 77a of the damage prevention plate 77 is fastened to the screw hole 76a of the pressing member 76, so that the sill portion 17 is formed in the same manner as shown in FIG. The landing fixing part 70 can be fixed. The damage prevention plate 77 is used to effectively prevent damage to the tip of the sill portion 17.

  Two plate portions 59c are connected in parallel to the outer surface of one column portion 59a constituting the ladder body 50, and a hole 59d is formed in each plate portion 59c. In a state where the ladder main body 50 is erected and rotated in a predetermined direction, the pin support portion 75d of the landing fixing portion 70 fixed to the sill portion 17 is disposed inside each plate portion 59c, and a hole in each plate portion 59c. The ladder main body 50 is fixed to the sill portion 17 by inserting the pins 74 into 59d and the pin insertion holes 75e of the pin support portions 75d and detachably connecting the pins 74 to the main body portion 75.

  In the case of such a configuration, as in the configuration described with reference to FIGS. 1 to 11, the workability when getting off from the landing 15 to the pit is improved, and between the pit wall surface and the car when not in use. It is possible to achieve compatibility with the necessity of disposing the ladder device 10. Other configurations and operations are the same as those in FIGS. 1 to 11.

  10, 10a Elevator pit ladder device (ladder device), 11 hoistway, 12 passenger car, 13 worker, 14 pit, 15 landing, 16 pit floor, 17 sill section, 18 sill groove, 19 second hook, 20 20a floor fixing member, 21 plate portion, 22 wall portion, 23 fixed side hole, 24 plate portion, 25 wall portion, 26 fixed side hole, 30 first rotating member, 31 second plate portion, 32 second wall portion, 33 First rotation side hole, 34 Second rotation side hole, 35 Second plate portion, 36 Second wall portion, 37 Shaft portion, 40 Second rotation member, 41 Disc portion, 42 Ladder coupling portion, 43 Third rotation Side hole, 44 Second rotation side hole, 50 Ladder body, 51 Upper member, 52 Lower member, 53 Upper column, 54 Upper step, 55 Lower column, 56 Lower step, 57 Support shaft, 58 First Hook, 59a Pillar, 5 b step, 59c plate portion, 59d hole, 60 pulling means, 70 landing place fixing portion, 71 main body portion, 71a plate portion, 71b engagement plate portion, 71c arm portion, 71d pin support portion, 71e ladder insertion portion, 71f notch, 71g Hole, 72 Pressing member, 72a Body part, 72b T-shaped part, 72c Screw hole, 73 Fastening member, 74 Pin, 75 Body part, 75a Plate part, 75b Engaging plate part, 75c Notch, 75d Pin support part, 75e Pin insertion Hole, 75f hole, 76 pressing member, 76a screw hole, 76b main body, 76c bolt, 77 damage prevention plate, 77a hole, 80 first pin, 81 retaining portion, 82 second pin, 83 retaining portion, 84 engagement Joint part, 85 circular member H pit wall surface, L1 first axis, L2 second axis.

Claims (5)

A floor fixing member fixed to the pit floor of the elevator hoistway;
A first rotating member supported rotatably about a first axis in a horizontal direction with respect to the floor fixing member;
A second axis included in a plane perpendicular to the first axis is supported so as to be rotatable with respect to the first rotating member, and the second axis is moved up and down with the first rotating member rotated to a predetermined position. A second rotating member facing in a direction;
A ladder main body having two pillar portions and a plurality of steps connected between the pillar portions, one end side of which is fixed to the second rotating member, and the pit floor surface from the landing side to the pit back side The position when not in use when tilted toward the stand and by rotating around the first axis, and at the time of use in a predetermined orientation with respect to the landing by rotating around the second axis A ladder body movable to a position;
A pit ladder apparatus for an elevator, comprising: lifting means connected to the ladder body and used for lifting the other end side of the ladder body from the landing. In the elevator pit ladder apparatus according to claim 1,
An elevator pit ladder apparatus comprising: a landing fixing portion that fixes the ladder main body to a landing in a state where the ladder main body is erected and is in the predetermined direction. In the elevator pit ladder apparatus according to claim 1,
The elevator pit ladder apparatus, wherein the predetermined direction is a direction in which a length direction of the step is orthogonal to a length direction of the sill portion. In the elevator pit ladder apparatus according to claim 1,
The ladder main body includes an upper member and a lower member connected to a lower portion of the upper member so as to be foldable. In the elevator pit ladder apparatus according to claim 1,
The landing fixing part is locked to the main body part so as to be guided so as to be movable in a direction of moving to and away from the landing part, with a main body part having an engagement plate part engaged with a groove of a sill part of the landing. A pressing member, a fastening member fastened to a screw hole of the pressing member in a state of penetrating the engaging plate portion, and sandwiching a distal end portion of the sill portion between the pressing member and the engaging plate portion by fastening, the main body A pit ladder apparatus for an elevator, including a coupling member that is detachably coupled to the main body and that fixes the ladder main body to the main body.

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