JP2010064869A - Pit ladder device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pit ladder device capable of easily moving a ladder from a housing position to a use position, saving the labor. <P>SOLUTION: This pit ladder device includes: a ladder holder 3 fitted to the wall surface 1a of a hoistway 1; a ladder 9 having an engagement part 10 to be engaged with the ladder holder 3 freely to move in the vertical direction in an upper part thereof and having a guide roller 11 abutting on the bottom of a pit 2 and capable of moving in a direction for coming close to or separating from the wall surface 1a, wherein the guide roller 11 is movable to a storage position closer to the wall face 1a to which ladder holder 3 attached and the guide roller 11 is movable to the use position away from the wall face 1a to which the ladder holder 3 attached, and movable from the storage position to the use position by its own weight; and a lock mechanism 16 for locking the ladder 9 positioned in the housing position into the ladder holder 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pit ladder device, and more particularly to a pit ladder device used when getting down to a pit for work.

  The elevator is provided with a pit ladder device used when getting down to the pit. For example, a pit ladder device described in Patent Document 1 is known.

The pit ladder device described in Patent Document 1 prevents the ladder from being overturned during use by holding the upper end of the ladder with a fixture.
Japanese Utility Model Publication No. 4-24576

  However, in the above-described pit ladder apparatus, it takes time to move the ladder from the storage position to the use position.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a pit ladder device that can easily perform the operation of moving the ladder from the storage position to the use position without taking time and effort. That is.

  A first feature according to an embodiment of the present invention is that, in the pit ladder apparatus, a ladder holding body attached to a wall surface of the hoistway and an engaging portion engaged with the ladder holding body so as to be movable in the vertical direction are provided. The upper part has a guide roller which is in contact with the bottom part of the pit and is movable in a direction in which the ladder holder is attached to and separated from the wall surface to which the ladder holder is attached. The guide roller is attached to the ladder holder. It is possible to move the storage position approached to the wall surface and the use position where the guide roller is separated from the wall surface to which the ladder holder is attached, and can move from the storage position to the use position by its own weight. And a lock mechanism for locking the ladder located at the storage position to the ladder holding body.

  According to the present invention, the operation of moving the ladder from the storage position to the use position can be easily performed without taking time and effort.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the pit ladder device according to the first embodiment of the present invention is a wall surface 1 a of a hoistway 1 in which a car (not shown) moves up and down, and is attached in the vicinity of a pit 2. A ladder holding body 3 extending in the vertical direction is provided. In FIG. 1, 4 is a hall sill of the lowest floor that enters and exits pit 2, 5 is an entrance for getting on and off the car on the floor of the lowest floor, 6 is a hold door that opens and closes the entrance 5, and 7 is The Fisher plate is shown.

  The ladder holding body 3 is configured by a pair of ladder holding pieces 3a and 3b facing each other in parallel, and an elongated hole 8 is formed in the upper part of the ladder holding pieces 3a and 3b in the vertical direction.

  A ladder 9 is attached to the ladder holding body 3 so as to be movable between a storage position and a use position. 1 and 2 show the ladder 9 located at the storage position, and FIG. 3 shows the ladder 9 located at the use position.

  A pair of engaging portions 10 are attached to the upper portion of the ladder 9, and these engaging portions 10 are engaged with elongated holes 8 formed in the ladder holding pieces 3 a and 3 b so as to be movable in the vertical direction, thereby holding the ladder. The ladder 9 is attached to the body 3.

  A pair of guide rollers 11 that are brought into contact with the bottom of the pit 2 and are movable toward and away from the wall surface 1a to which the ladder holder 3 is attached are rotatably attached to the lower portion of the ladder 9. .

  An arm 13 is attached to the ladder 9 so that one end thereof is pivotally supported by a support shaft 12 and is rotatable about the axis of the support shaft 12. A lock pin 14 that also serves as an operation handle is attached to the other end of the arm 13.

  The ladder holding piece 3b is formed with a lock groove 15 with which the lock pin 14 is engaged. The lock groove 15 moves the engaging portion 10 upward along the long hole 8 to position the ladder 9 in the storage position, and the arm 13 and the lock pin 14 are rotated about the support shaft 12 as a fulcrum. Are formed at positions where the lock pins 14 are engaged. The arm 13, the lock pin 14, and the lock groove 15 constitute a lock mechanism 16 that locks the ladder 9 to the ladder holder 3 in the storage position.

  Further, when the ladder 9 is positioned at the storage position and the lock mechanism 16 is locked, the lock pin 14 is rotated to a position for releasing the engagement with the lock groove 15 to release the lock mechanism 16 from the locked state. Then, the ladder 9 moves toward the use position by its own weight.

  In such a configuration, when the ladder 9 is not used, the ladder 9 is locked by the lock mechanism 16 at the storage position as shown in FIGS. When the ladder 9 is locked at the storage position, the lock pin 14 is engaged with the lock groove 15, and the ladder 9 is maintained in a substantially upright state along the wall surface 1 a to which the ladder holder 3 is attached in the hoistway 1. ing.

  In order to perform the work in the pit 2, the ladder 9 is moved to a use position inclined obliquely as shown in FIG. When the ladder 9 is located at the use position, the guide roller 11 is moved to a position away from the wall surface 1a, and the engaging portion 10 is moved along the elongated hole 8 to the lower position.

  When the ladder 9 located at the storage position is moved to the use position, the hold door 6 is opened, and the lock pin 14 located at substantially the same height position as the hole sill 4 is operated to rotate with the lock groove 15. Release the engagement.

  As a result, the ladder 9 automatically moves toward the use position by its own weight, the guide roller 11 moves in a direction away from the wall surface 1a, and the engaging portion 10 moves downward in the long hole 8.

  Therefore, when the ladder 9 located at the storage position is moved to the use position, it is only necessary to release the lock state of the lock mechanism 16, and the ladder 9 is automatically moved to the use position by its own weight. For this reason, the operation | work which moves the ladder 9 located in a storage position to a use position can be performed easily without taking an effort.

(Second Embodiment)
A pit ladder apparatus according to a second embodiment of the present invention will be described with reference to FIGS. Note that, in the second embodiment and other embodiments thereafter, the same components as those described in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted.

  The basic configuration of the pit ladder apparatus of the second embodiment is the same as that of the pit ladder apparatus of the first embodiment. The second embodiment is different from the first embodiment in that a pair of guide rails 21 for guiding the guide roller 11 along the moving direction is provided at the bottom of the pit 2.

  The guide rail 21 has an L-shaped cross section, and has a bottom surface portion 21 a that is stepped on by the guide roller 11 and a side surface portion 21 b that covers the outer surface of the guide roller 11.

  In such a configuration, when the ladder 9 is moved from the storage position to the use position, the guide roller 11 is guided along the side surface portion 21b of the guide rail 21, so when the ladder 9 is moved to the use position, And when an operator gets down to the pit 2 using the ladder 9, the roll of the guide roller 11 is prevented, and the wobble of the ladder 9 caused by the roll of the guide roller 11 can be suppressed.

(Third embodiment)
A pit ladder apparatus according to a third embodiment of the present invention will be described with reference to FIGS.

  The basic configuration of the pit ladder apparatus of the third embodiment is the same as that of the pit ladder apparatus of the first embodiment. The third embodiment differs from the first embodiment in that a guide shoe 31 is used in place of the guide roller 11 described in the first embodiment, and a groove in the guide shoe 31. The guide rail 32 with which 31a engages is provided at the bottom of the pit 2.

  In such a configuration, when the ladder 9 is moved from the storage position to the use position, the guide shoe 31 having the groove 31 a engaged with the guide rail 32 moves along the guide rail 32. For this reason, when the ladder 9 is moved to the use position and when the worker gets down to the pit 2 using the ladder 9, the wobbling of the ladder 9 can be further suppressed.

(Fourth embodiment)
A pit ladder apparatus according to a fourth embodiment of the present invention will be described with reference to FIG.

  The basic configuration of the pit ladder device of the fourth embodiment is the same as that of the pit ladder device of the first embodiment. The fourth embodiment is different from the first embodiment in that the wire rope 41 connected to the upper end of the ladder 9 and the wire rope 41 are wound around the first embodiment. The take-up device 42 is provided to move the ladder 9 located at the use position to the storage position by taking it.

  In such a configuration, when the ladder 9 positioned at the storage position is moved to the use position, as described in the first embodiment, the lock pin 14 is rotated to engage with the lock groove 15. The ladder 9 that is in a substantially upright state is released and the guide roller 11 is moved away from the wall surface 1a.

  When the ladder 9 located at the use position is returned to the storage position after the work in the pit 2 is completed, the wire rope 41 is wound up by operating the winding device 42. By winding the wire rope 41, the ladder 9 located at the use position gradually moves toward the storage position. After the ladder 9 is moved to the storage position, the lock pin 14 is engaged with the lock groove 15 to lock the ladder 9 to the ladder holder 3 at the storage position.

  Therefore, by providing the wire rope 41 and the winding device 42, the operation of moving the ladder 9 from the use position to the storage position can be easily performed without trouble, and the operation of storing the ladder 9 can be performed. Safety can be increased.

(Fifth embodiment)
A pit ladder apparatus according to a fifth embodiment of the present invention will be described with reference to FIGS.

  The basic configuration of the pit ladder apparatus of the fifth embodiment is the same as that of the pit ladder apparatus of the first embodiment. The fifth embodiment is different from the first embodiment in that a safety device 51 for restricting movement of a movable body provided in the hoistway 1, for example, raising and lowering of a car and a balance weight, and a ladder 9 are provided. A safety device actuating hook 52, which is a switching member for switching the safety device 51 to the restricted state when it is located at the use position, is provided.

  The safety device 51 is attached to a safety device installation frame 53 provided by connecting the upper ends of the ladder holding pieces 3a and 3b. The safety device 51 is provided with a switch portion 51a for switching on / off. When the safety device 51 is switched on by releasing the pressing of the switch portion 51a, a movable portion provided in the hoistway 1 is provided. A regulation signal that regulates the raising and lowering of the car and the counterweight as the body is output from the safety device 51 to an elevator control device (not shown). Further, when the switch 51a is pressed and the safety device 51 is switched off, the output of the restriction signal from the safety device 51 to the elevator control device is stopped.

  The safety device operating hook 52 is attached to the cross beam 54 at the upper end of the ladder 9 so as to be rotatable in the vertical direction. When the safety device operating hook 52 is rotated upward when the ladder 9 is located at the storage position, the safety device operating hook 52 presses the switch portion 51a of the safety device 51, and the safety device 51 is turned off.

  FIG. 10 shows a state in which the ladder 9 is positioned at the storage position, the safety device operating hook 52 is rotated upward (in the direction of arrow A), and the switch portion 51a is pressed. When the switch 51a is pressed, the safety device 51 is turned off, and the output of the restriction signal from the safety device 51 to the elevator control device is stopped.

  FIG. 9 shows that when the ladder 9 is located at the storage position, the safety device operating hook 52 is rotated downward (in the direction of arrow B) to move the ladder 9 to the use position to release the pressing of the switch portion 51a. Shows the state. When the pressing of the switch unit 51a is released, the safety device 51 is turned on, and a restriction signal is output from the safety device 51 to the elevator control device.

  In such a configuration, when the ladder 9 is moved from the storage position to the use position, the safety device operating hook 52 is moved downward (arrow) from the position shown in FIG. 10 in a state where the ladder 9 is positioned at the storage position. B direction) must be rotated. In a state where the safety device operating hook 52 is pressing the switch portion 51 a, the safety device operating hook 52 is connected to the switch portion 51 a of the safety device 51 even if the lock mechanism 16 (see FIGS. 1 to 3) is released. This is because the ladder 9 cannot be moved to the use position because it is caught. By rotating the safety device operating hook 52 downward, the pressing of the switch portion 51a is released as shown in FIG. 9, and the safety device 51 is turned on.

  When the safety device 51 is turned on, a restriction signal is output from the safety device 51 to the elevator control device, and lifting and lowering of a car, a balance weight, and the like are restricted.

  For this reason, while the ladder 9 is moved to the use position and the work in the pit 2 is being performed, it is possible to prevent the car and the like from going up and down, and the work in the pit 2 is safe. Can increase the sex.

  When the work in the pit 2 is completed and the ladder 9 is moved to the storage position, the safety device operating hook 52 is rotated upward as shown by an arrow A in FIG. The safety device 51 can be turned off by pressing the part 51a. When the safety device 51 is turned off, the output of the restriction signal from the safety device 51 to the elevator control device is stopped, and the car or the like can be moved up and down.

(Sixth embodiment)
A pit ladder apparatus according to a sixth embodiment of the present invention will be described with reference to FIG.

  The basic configuration of the pit ladder apparatus of the sixth embodiment is the same as that of the pit ladder apparatus of the first embodiment. The sixth embodiment differs from the first embodiment in that the movable body provided in the hoistway 1 is moved, for example, a car or a balance weight, as described in the fifth embodiment. A safety device 61 that restricts raising and lowering is provided, and the guide roller 11 is used as a switching member that switches the safety device 61 to the restricted state when the ladder 9 is located at the use position.

  The safety device 61 is attached to the bottom of the pit 2. This safety device 61 is provided with a switch part 61a for switching on / off, and when the pressing of the switch part 61a is released and the safety device 61 is switched on, a movable body provided in the hoistway 1 A regulation signal that regulates the lifting and lowering of the car and the counterweight is output from the safety device 61 to an elevator control device (not shown). When the switch unit 61a is pressed and the safety device 61 is switched off, the output of the restriction signal from the safety device 61 to the elevator control device is stopped.

  In FIG. 11, a guide roller 11 indicated by a virtual line indicates a case where the ladder 9 is located at the storage position, and a guide roller 11 indicated by a solid line indicates a case where the ladder 9 is located at the use position.

  When the ladder 9 is located at the storage position, the guide roller 11 presses the switch portion 61a of the safety device 61, the safety device 61 is turned off, and the output of the regulation signal from the safety device 61 to the elevator control device is stopped. Is done.

  When the ladder 9 is located at the use position, the pressing of the switch portion 61a of the safety device 61 by the guide roller 11 is released, the safety device 61 is turned on, and a restriction signal is output from the safety device 61 to the elevator control device. The

  In such a configuration, when the ladder 9 is moved to the use position, the guide roller 11 moves to the position indicated by the solid line, and the pressing of the switch portion 61a of the safety device 61 by the guide roller 11 is released, and the safety device 61 turns on.

  When the safety device 61 is turned on, a restriction signal is output from the safety device 61 to the elevator control device, and lifting and lowering of a car, a balance weight, and the like are restricted.

  For this reason, while the ladder 9 is moved to the use position and the work in the pit 2 is being performed, it is possible to prevent the car and the like from going up and down, and the work in the pit 2 is safe. Can increase the sex.

  When the work in the pit 2 is finished and the ladder 9 is moved to the storage position, the guide roller 11 is moved to the position indicated by the phantom line, and the switch portion 61a of the safety device 61 is pressed and the safety device 61 is moved. Turns off. When the safety device 61 is turned off, the output of the restriction signal from the safety device 61 to the elevator control device is stopped, and the car and the like can be moved up and down.

  According to the present embodiment, the on / off switching of the safety device 61 can be automatically performed by moving the ladder 9 between the use position and the storage position, and the on / off switching of the safety device 61 is forgotten. Does not happen.

  In the present embodiment, when the ladder 9 is moved to the use position, the pressing of the switch portion 61a of the safety device 61 by the guide roller 11 is released, the safety device 61 is turned on, and the elevator from the safety device 61 is turned on. The case where a restriction signal is output to the control device is described as an example. However, on the contrary, a safety device is installed at a position pressed by the guide roller 11 when the ladder 9 is moved to the use position, and a restriction signal is sent from the safety device pressed by the guide roller 11 to the elevator control device. May be configured to output.

  FIG. 12 shows a modification of the sixth embodiment, in which a safety device 62 is attached to the wall surface 1 a of the hoistway 1 that is the bottom of the pit 2. Also in this modified example, when the ladder 9 is moved to the use position, the guide roller 11 moves to the position indicated by the solid line, and the pressing of the switch portion 61a of the safety device 61 by the guide roller 11 is released, and the safety device 61 turns on. When the safety device 61 is turned on, a restriction signal is output from the safety device 61 to the elevator control device, and lifting and lowering of a car, a balance weight, and the like are restricted.

  When the work in the pit 2 is completed and the ladder 9 is moved to the storage position, the guide roller 11 is moved to the position indicated by the phantom line, and the switch portion 62a of the safety device 62 is pressed and the safety device 62 is moved. Turns off. When the safety device 62 is turned off, the output of the restriction signal from the safety device 62 to the elevator control device is stopped, and the car or the like can be moved up and down.

(Seventh embodiment)
A pit ladder apparatus according to a seventh embodiment of the present invention will be described with reference to FIGS.

  The basic configuration of the pit ladder apparatus of the seventh embodiment is the same as that of the pit ladder apparatus of the first embodiment. The sixth embodiment is different from the first embodiment in that when the ladder 9 is located at the use position, the hold door 6 on the floor (the floor on the lowest floor) entering and exiting the pit 2 is closed. This is the point that a hold-a close prevention device 71 is provided to prevent this.

  The hold door closing prevention device 71 locks the holding body 72 provided on the lower side of the hole sill 4, the stopper 74 held on the holding body 72 via the spring 73, and the ladder 9 to the ladder holding body 3. And the lock pin 14.

  When the ladder 9 is located at the use position, the stopper 74 is biased by the spring 73 and protrudes upward from the upper surface portion of the hole sill 4 as shown in FIG. Thereby, it is possible to restrict the hold door 6 from moving on the hole sill 4 to the closed position. The hole sill 4 has an opening (not shown) through which the stopper 74 projects upward.

  When the ladder 9 is located at the storage position, as shown in FIG. 13, the tip end portion of the lock pin 14 engaged with the lock groove 15 formed in the ladder holding piece 3 b comes into contact with the stopper 74. When the lock pin 14 abuts against the stopper 74, the stopper 74 is pushed downward against the urging force of the spring 73, and the stopper 74 is maintained so as not to protrude upward from the upper surface portion of the hole sill 4.

  In such a configuration, when the ladder 9 is moved to the storage position and the lock pin 14 is engaged with the lock groove 15 in order to lock the ladder 9 at the storage position, the lock pin 14 comes into contact with the stopper 74 and stops. The stopper 74 is maintained in a state where it does not protrude upward from the upper surface of the hole sill 4. Therefore, the hold door 6 moves on the hole sill 4 without being restricted by the stopper 74, and the hold door 6 is opened and closed.

  When the ladder 9 is moved to the use position, the lock pin 14 is rotated to a position where the engagement with the lock groove 15 is released.

  When the lock pin 14 is rotated to a position where the engagement with the lock groove 15 is released, the contact of the lock pin 14 with the stopper 74 is released. Projecting upward from

  When the stopper 74 protrudes upward from the upper surface portion of the hole sill 4, the stopper 74 is restricted from moving to the closing position of the hold door 6. Thereby, it is possible to prevent the hold door 6 from being closed during the work in the pit 2. It is also possible to prevent forgetting to move the ladder 9 to the storage position after the work in the pit 2 is completed.

It is a front view which shows the pit ladder apparatus of the 1st Embodiment of this invention. It is a side view which shows a pit ladder apparatus in case a ladder is located in a storage position. It is a side view which shows a pit ladder apparatus in case a ladder is located in a use position. It is a front view which shows a part of pit ladder apparatus of the 2nd Embodiment of this invention. It is the side view. It is a front view which shows a part of pit ladder apparatus of the 3rd Embodiment of this invention. It is the side view. It is a front view which shows the pit ladder apparatus of the 4th Embodiment of this invention. It is a front view which shows a part of pit ladder apparatus of the 5th Embodiment of this invention. It is the side view. It is a side view which shows a part of pit ladder apparatus of the 6th Embodiment of this invention. It is a side view which shows a part of pit ladder apparatus of the modification of 6th Embodiment. It is a part of pit ladder apparatus of the 7th Embodiment of this invention, Comprising: It is a front view which shows the case where a ladder is located in an accommodation position. It is a part of pit ladder apparatus of the 7th Embodiment of this invention, Comprising: It is a front view which shows the case where a ladder is located in a use position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hoistway 1a Wall surface 2 Pit 3 Ladder holding body 8 Ladder 9 Engagement part 10 Guide roller 15 Lock mechanism 21 Guide rail 31 Guide shoe 32 Guide rail 41 Wire rope (rope)
42 Winding device 51 Safety device 52 Safety device operating hook (switching member)
61 Safety device 71 Hold-a close prevention device

Claims (8)

A ladder holder attached to the wall of the hoistway;
The upper part has an engaging portion that is engaged with the ladder holding body so as to be movable in the vertical direction, and is in contact with the bottom of the pit so as to move toward and away from the wall surface to which the ladder holding body is attached. A storage position in which a guide roller is provided at a lower portion, and the guide roller is moved closer to the wall surface to which the ladder holder is attached; and a use position in which the guide roller is moved away from the wall surface to which the ladder holder is attached; A ladder that is movable by its own weight from the storage position to the use position;
A locking mechanism that locks the ladder positioned in the storage position to the ladder holder;
A pit ladder device comprising:   The pit ladder apparatus according to claim 1, further comprising a guide rail that guides the guide roller along a moving direction at a bottom portion of the pit.   The pit ladder apparatus according to claim 1, further comprising a guide shoe instead of the guide roller.   4. A rope connected to the ladder, and a winding device that winds the rope to move the ladder from the use position to the storage position. Pit ladder device as described in. A safety device for restricting movement of a movable body provided in the hoistway;
A switching member that switches the safety device to a restricted state when the ladder is located in the use position;
The pit ladder apparatus according to any one of claims 1 to 4, further comprising: The safety device is provided on the ladder holder,
The switching member is provided on the ladder so as to be rotatable between a position where the safety device is pressed and a position where the safety device is released. When the ladder is moved to a use position, the switching device releases the pressure of the safety device. 6. The pit ladder apparatus according to claim 5, wherein the pit ladder apparatus is a hook for operating a safety device that is rotated to a position and switches the safety device to a restricted state by the rotation. The safety device is provided at the bottom of the pit,
The switching member moves to a position where the safety device is pressed or released when the ladder is moved to the storage position or the use position, and the safety roller is switched to a restricted state by this movement. The pit ladder device according to claim 5, wherein the pit ladder device is the guide shoe.   8. A holder closing prevention device for preventing a floor holder entering and exiting the pit from being closed when the ladder is in a use position. The pit ladder device according to the item.

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