JP2014227268A - Pit access apparatus for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pit access apparatus for an elevator which can suppress horizontal swinging of a step for elevation, during an operator's elevation, about a guide rail on the other end side by fixing a backing material to the back face of the guide rail and one end side of the step for elevation to the backing material.SOLUTION: A pit access apparatus 20 includes a backing material 21 which is rectangular flat-like and is provided with a plurality of pairs of first through holes separated in the width direction with a space wider than the width of the flange part, with the pairs of the through holes separated in the longitudinal direction, arranged on the back face of a flange part so as to be located on both sides, in the width direction, of the flange, fixed to a guide rail 4 through a fastening force of a first fastening bolt 16 in a state where the flange part is held, with pressing, between a rail clip 15 and the backing material 21 and arranged in the pit 2 and a step 22 for elevation which is fixed to the backing material 21 and extends horizontally in the pit 2.

Description

  The present invention relates to an elevator pit entry / exit device for an operator to enter / exit from a pit provided at a lower part of a hoistway from a lowermost landing.

  In the elevator, maintenance inspection of the equipment installed in the lowest pit of the hoistway is necessary, and the worker uses a ladder to get off from the lowest floor landing in the pit and from inside the pit. Maintenance work is inspected by repeating the work of climbing to the lowest floor platform.

  A conventional elevator pit ladder holding device has an arm member fixed at one end to a guide rail with a rail clip and provided in a substantially horizontal direction in the pit, and is provided on the arm member so that the ladder step can be detachably attached. And a hook member that holds the ladder (see, for example, Patent Document 1). The ladder is permanently installed in the pit by inserting the step into the hook member, the lower end of the ladder being grounded to the bottom surface of the pit, and being held by the pit ladder holding device of the conventional elevator.

JP 2005-263387 A

  In a conventional elevator pit ladder holding apparatus, a ladder is fixed to a back surface of a guide rail with a rail clip and is held by inserting a step into a hook member attached to an arm member extending in a horizontal direction. Therefore, when the worker ascends and descends along the ladder, the load of the worker acts to displace the arm member in a direction perpendicular to the back surface of the guide rail. The load of the worker acting to displace the arm member in the direction orthogonal to the back surface of the guide rail is transmitted to the guide rail via the arm member, and acts to rotate the guide rail around the vertical axis. To do. Since the guide rail has low torsional rigidity, the guide rail rotates about the vertical axis, and the other end of the arm member swings greatly in the horizontal direction around the guide rail.

  The present invention has been made in order to solve such problems. The guide rail and the backing material are fixed by fixing the backing material to the back surface of the guide rail and fixing one end side of the lifting step to the backing material. Elevator pit entry / exit that increases the torsional rigidity of the support member for the lifting step that is configured by integrating the lifting and lowering of horizontal deflection centering on the guide rail on the other end side of the lifting step when the worker moves up and down The object is to obtain a device.

  The elevator pit entrance / exit device according to the present invention is formed in a rectangular flat plate shape wider than the flange portion of the guide rail, and a pair of first through holes spaced apart in the width direction from the width of the flange portion are separated in the length direction. A plurality of pairs are formed, and the first through holes forming a pair are arranged on the back surface of the flange portion so as to be located on both sides in the width direction of the flange portion, and are passed through the first through holes forming a pair. The flange portion is pressed between the rail clip and fixed to the guide rail by the fastening force of the first fastening bolt, and the backing material disposed in the pit and the one end side to the backing material And an elevating step that is fixed and extends horizontally and is arranged in n stages (where n is an integer of 1 or more) in the pit.

  According to the present invention, the backing material is fixed to the back surface of the guide rail, and the elevating step is fixed to the backing material. Therefore, the support member of the lifting step is configured by integrating the guide rail and the backing material, and the torsional rigidity is increased. Thereby, the horizontal shake centering on the guide rail of the other end side of the raising / lowering step at the time of an operator's raising / lowering is suppressed.

It is a top view explaining the whole structure of the elevator which concerns on Embodiment 1 of this invention. It is a top view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a side view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a front view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 1 of this invention. It is a VV arrow sectional view of Drawing 4. It is a front view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 2 of this invention. It is VII-VII arrow sectional drawing of FIG. It is a side view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 2 of this invention. It is a side view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 2 of this invention. It is a front view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 3 of this invention. It is XI-XI arrow sectional drawing of FIG. It is a front view which shows the pit entrance / exit apparatus of the elevator which concerns on Embodiment 4 of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an elevator pit exit / entry device of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is a top view for explaining the overall configuration of an elevator according to Embodiment 1 of the present invention, FIG. 2 is a top view showing an elevator pit entrance / exit device according to Embodiment 1 of the present invention, and FIG. 4 is a side view showing an elevator pit entry / exit device according to Embodiment 1, FIG. 4 is a front view showing the elevator pit entrance / exit device according to Embodiment 1 of the present invention, and FIG. FIG.

  In FIG. 1, an elevator is guided by a pair of guide rails 4 so as to be movable up and down in the hoistway 1, and is guided by a pair of guide rails 6 and can be moved up and down in the hoistway 1. And a counterweight 5 provided. Although not shown, the car 3 and the counterweight 5 are driven via a rope by a hoisting machine provided at the top of the hoistway 1, and move up and down in the hoistway 1 in opposite directions. A pit exit / entry device 20 is installed on one guide rail 4. The pit access device 20 may be installed on the guide rail 6 that guides the counterweight 5 depending on the layout of the elevator.

  Further, as shown in FIG. 2, the shock absorber 7 is erected on the shock absorber support beam 8 fixed to the pit bottom surface 2a and installed in the pit 2 below the hoistway 1, and the car 3 is caused for some reason. In order to reduce the impact when the vehicle goes over the bottom floor and collides with the bottom surface 2a of the pit. The rail mounting plate 9 is manufactured by bending a steel plate into an L shape, and is fixed to both ends of the shock absorber support beam 8 with the L-shaped upright piece 9a being vertical.

  The guide rail 4 is made of a long body having a T-shaped cross section in which a base portion 4a is erected at the center in the width direction of the flange portion 4b. The guide rail 4 is attached to a beam (not shown) provided in the hoistway 1 and supported by a plurality of rail brackets (not shown) arranged in the hoistway 1 so as to be separated from each other in the vertical direction. It is fixed and arranged continuously in the vertical direction. In this way, two rows of guide rails 4 arranged continuously in the vertical direction are arranged so as to be separated in the width direction of the car 3. And each lower end part of the guide rail 4 located in the lowest position of each row | line | column is fixed to the both ends of the shock absorber support beam 8, and a pair of rail mounting plate 9 which protrudes perpendicularly upward from the shock absorber support beam 8 The rear surface of the flange portion 4 b is directed to the opposing surface of the upright piece 9 a and is fixed to the rail mounting plate 9 by the rail clip 15, the first fastening bolt 16, and the nut 17. In addition, since the guide rail 6 is comprised similarly to the guide rail 4, the description is abbreviate | omitted.

  Next, the configuration of the pit entrance / exit device 20 will be described with reference to FIGS.

  The pit entry / exit device 20 includes a backing material 21 formed by forming a steel plate into a rectangular flat plate having a width wider than the flange portion 4b of the guide rail 4, and a lifting step 22 prepared by bending the steel plate into an L shape. And. The backing material 21 has its lower end face abutted against the upper end face of the upright piece 9a of the rail mounting plate 9, and its surface is directed to the back surface of the flange portion 4b of the guide rail 4, so that the rail clip 15, the first fastening bolt 16, The nut 17 fixes the flange portion 4b. The elevating step 22 has the L-shaped bent piece 22b positioned upward and the base piece 22a is directed to the back surface of the backing material 21, and together with the backing material 21 by the rail clip 15, the first fastening bolt 16, and the nut 17. The flange portion 4b of the guide rail 4 is fastened together and installed, for example, in five stages.

  The upper end of the backing material 21 is located above the lowest floor level 10 as shown in FIGS. 3 and 4. In addition, the upper two steps of lifting / lowering step 22 are located above the lowermost floor level 10, and the lower three steps of lifting / lowering step 22 are located below the lowermost floor level 10 (in pit 2). doing. Further, as shown in FIG. 2 and FIG. 4, the ascending / descending step 22, when viewed from above in the vertical direction, outside the car projection area 11 and along the pit side wall surface 2 b from the guide rail 4 to the lowest floor landing. It extends horizontally on the 12 side.

  Next, the mounting structure of the pit entrance / exit device 20 will be described with reference to FIGS.

  A pair of first through holes 23 are formed in the backing material 21 so as to be spaced apart from each other in the width direction so as to sandwich the flange portion 4b of the guide rail 4 and are separated from each other in the length direction to form seven pairs. Has been. On one end side of the base piece 22a of the ascending / descending step 22, a pair of second through holes 24 are drilled in the longitudinal direction with a spacing equal to the spacing between the paired first through holes 23. Yes.

  The backing material 21 is disposed with its lower end face butted against the upper end face of the upright piece 9 a of the rail mounting plate 9 and its surface is directed to the rear face of the flange portion 4 b of the guide rail 4. Then, the shaft portion of the first fastening bolt 16 is passed through the through hole 15a of the rail clip 15 and the pair of the first through hole 23 at the upper end and the lower end, and screwed to the protruding portion of the shaft portion of the first fastening bolt 16. The backing material 21 is fastened and fixed to the guide rail 4 by fastening the nut 17.

  The step 22 for raising / lowering is arranged so that the second through hole 24 overlaps the first through hole 23 and one end side of the base piece 22 a is directed to the back surface of the backing material 21. Then, the shaft portion of the first fastening bolt 16 is passed through the through hole 15 a of the rail clip 15, the first through hole 23 of the backing material 21, and the second through hole 24 of the lifting step 22. The nut 17 screwed to the projecting portion is fastened, and the elevating step 22 is fastened to the guide rail 4 together with the backing material 21.

  In the elevator equipped with the pit entrance / exit device 20 configured as described above, for example, the car 3 is landed on the top floor, and the worker uses the step 22 for ascending / descending to the pit 2 from the bottom floor landing 12. The work of descending into the pit 2 and ascending from the pit 2 to the lowest floor platform 12 is repeated to perform maintenance and inspection of the equipment in the pit 2. At this time, the worker grasps the lifting step 22 located above the lowest floor level 10 and gets down from the lowest floor landing 12 into the pit 2 or from the pit 2 to the lowest floor landing 12. Rise to.

  In the pit entrance / exit device 20 according to the first embodiment, the backing material 21 is disposed on the back surface of the flange portion 4b of the guide rail 4 and is fastened and fixed to the flange portion 4b by the rail clip 15, the first fastening bolt 16 and the nut 17. Has been. As described above, since the guide rail 4 and the backing material 21 are integrated to form the support member of the lifting step 22, the torsional rigidity of the support member of the lifting step 22 is increased. Therefore, when the worker ascends and descends the ascending / descending step 22 supported by the supporting member of the ascending / descending step 22, the load of the operator is perpendicular to the back surface of the flange portion 4 b of the guide rail 4. Even if it acts so as to be displaced in the direction, the rotation of the guide rail 4 around the vertical axis is suppressed. Therefore, it is possible to prevent the other end side of the lifting step 22 from swinging horizontally around the guide rail 4, and the worker can ascend and descend using the lifting step 22 with peace of mind.

Since the backing material 21 and the elevating step 22 are fastened together with the guide rail 4 by the fasteners of the rail clip 15, the first fastening bolt 16 and the nut 17, a fastening tool for fixing the backing material 21 to the guide rail 4 The fastener for fixing the lifting step 22 to the backing material 21 is also used, and the number of parts can be reduced.
Since the pit entry / exit device 20 is configured to fix the backing material 21 to the guide rail 4 and the lifting step 22 to the backing material 21, the pit entry / exit device is not affected by the surface condition of the pit bottom surface 2a. The device 20 can be constructed.

  The shaft portion of the first fastening bolt 16 is passed through the through hole 15 a of the rail clip 15, the first through hole 23 of the backing material 21, and the second through hole 24 of the step 22 for lifting and lowering. The nut 17 screwed to the part is fastened, and the lifting step 22 is fastened together with the backing material 21 to the guide rail 4. Therefore, the backing material 21, the lifting step 22 and the rail clip 15 are pressure-bonded, and the guide rail 4 and the backing material 21 (rail clip 15) are frictionally joined. Therefore, when the worker ascends and descends using the lifting step 22, the load acting to displace the lifting step 22 vertically downward is transmitted to the backing material 21 via the lifting step 22. It is received by the backing material 21 and does not act on the guide rail 4.

  Further, the backing material 21 is attached to the guide rail 4 with its lower end abutted against the upper end of the upright piece 9 a of the rail mounting plate 9 that supports the lower end of the guide rail 4. Therefore, even when a load that acts to displace the lifting / lowering step 22 vertically downwards when the worker ascends / descends using the lifting / lowering step 22, the load is increased by the lifting / lowering step 22 and the backing material. The situation where the backing material 21 received by the rail mounting plate 9 via 21 and attached with the step 22 for lifting is displaced downward is prevented.

  The upper two steps for raising and lowering 22 are located above the lowest floor level 10. Therefore, when the worker descends from the lowest floor landing 12 to the lifting step 22 in the pit 2 and when going up to the lowest floor landing 12 from the lifting step 22 in the pit 2, the upper two steps of lifting Since the step 22 can be grasped, it is easy to ascend and descend using the pit entry / exit device 20.

  In the first embodiment, the number of steps for raising / lowering steps is set to five. However, the number of steps installed for the steps is appropriately set according to the pit depth.

Embodiment 2. FIG.
6 is a front view showing an elevator pit exit / entry device according to Embodiment 2 of the present invention, FIG. 7 is a sectional view taken along arrow VII-VII in FIG. 6, and FIG. 8 is an elevator according to Embodiment 2 of the present invention. FIG. 9 is a side view showing an elevator pit entry / exit device according to Embodiment 2 of the present invention. FIG. 8 shows a state where the car is landing on the lowest floor, and FIG. 9 shows an operating state of the shock absorber with the car pushing down the shock absorber.

  6 to 9, the pit entrance / exit device 30 is a device applied to an elevator having a shallow pit 2, and a handle member 31 made of a steel plate in a rectangular flat plate shape and a steel plate of a guide rail 4. A backing material 32 formed by forming a rectangular flat plate having a width wider than the flange portion 4b, and an elevating step 33 prepared by bending a steel plate into an L shape.

  Although not shown, the handle member 31 is disposed so as to reach the back surface of the flange portion 4b so that a pair of through holes formed on one end side sandwich the flange portion 4b of the guide rail 4. Then, the shaft portion of the second fastening bolt 35 is passed through the through hole 15a of the rail clip 15 and the through hole of the handle member 31, and the nut 36 screwed to the protruding portion of the shaft portion of the second fastening bolt 35 is fastened. Thus, the handle member 31 is fastened and fixed to the guide rail 4. The handle member 31 is located above the lowest floor level 10.

  Although not shown, the backing material 32 is formed such that the pair of first through holes are spaced apart in the width direction so as to sandwich the flange portion 4b of the guide rail 4 and are separated from each other in the length direction. 4 pairs are formed. The backing material 32 is disposed so that the lower end surface thereof is abutted against the upper end surface of the upright piece 9a of the rail mounting plate 9 and the surface is directed to the back surface of the flange portion 4b of the guide rail 4. The shaft portion is passed through each of the through hole 15a of the rail clip 15 and the pair of first through holes at the upper end and the lower end, and a nut 17 screwed to the protruding portion of the shaft portion of the first fastening bolt 16 is fastened. It is fastened and fixed to the rail 4. The backing material 32 has four pairs of first through holes and is configured in the same manner as the backing material 21 in the first embodiment except that the backing material 32 is short.

  Although not shown, one pair of second through holes is formed at one end side of the L-shaped base piece 33a of the lifting step 33 at intervals equal to the distance between the paired first through holes. Two pairs are formed. And the step 33 for raising / lowering positions the L-shaped bending piece 33b upward, the 2nd through hole is piled up on the 1st through hole, and the one end side of the base piece 33a is addressed to the back surface of the backing material 32. Arranged. Then, the shaft portion of the first fastening bolt 16 is passed through the through hole 15 a of the rail clip 15, the first through hole of the backing material 32 and the second through hole of the lifting / lowering step 33, and the shaft portion of the first fastening bolt 16 is projected. By tightening the nut 17 screwed to the part, the lifting step 33 is fastened together with the backing material 32 together with the guide rail 4 and is installed in the pit 2 in one stage. In addition, the raising / lowering step 33 is comprised similarly to the raising / lowering step 22 in the said Embodiment 1 except the point which has two pairs of 2nd through holes.

  Further, a scaffolding base 34 is fixed to the lifting step 33 by welding or the like and is disposed on the tip side of the lifting step 33. Then, as shown in FIG. 7, the lifting step 33 is seen from above in the vertical direction, outside the car projection area 11, along the pit side wall surface 2 b, from the guide rail 4 to the lowest floor platform 12 side. The scaffolding platform 34 is disposed on the front end side of the lifting / lowering step 33 so as to protrude into the car projection area 11. Further, as shown in FIG. 9, the lifting step 33 and the scaffolding platform 34 are provided with equipment installed in the lower part of the car 3 (the car 7 when the shock absorber 7 is activated) stopped by pushing down the shock absorber 7. It is configured not to interfere.

  In the elevator equipped with the pit entrance device 30 configured as described above, for example, the car 3 is landed on the uppermost floor, and the worker uses the scaffolding platform 34 of the lifting / lowering step 33 to use the lowermost landing. The operation of descending from pit 2 into pit 2 and ascending from pit 2 to the lowest floor platform 12 is repeated to perform maintenance and inspection of equipment in pit 2. At this time, the worker grasps the handle member 31 located above the lowermost floor level 10 and gets off from the lowermost floor landing 12 into the pit 2 or from within the pit 2 to the lowermost floor landing 12. Rise to.

  In the pit access device 30 configured as described above, the backing material 32 is disposed on the back surface of the flange portion 4b of the guide rail 4 and is fastened and fixed to the flange portion 4b by the rail clip 15, the first fastening bolt 16 and the nut 17. ing. Further, the shaft portion of the first fastening bolt 16 is passed through the through hole 15 a of the rail clip 15, the first through hole of the backing material 32 and the second through hole of the lifting / lowering step 33, and the shaft portion of the first fastening bolt 16 is projected. The lifting and lowering step 33 is fastened to the guide rail 4 together with the backing material 32 by fastening the nut 17 screwed to the portion. Further, the backing material 32 is attached to the guide rail 4 with its lower end abutted against the upper end of the upright piece 9 a of the rail mounting plate 9 that supports the lower end of the guide rail 4. Therefore, the second embodiment also has the same effect as the first embodiment.

  Also in the second embodiment, since the handle member 31 is located above the lowest floor level 10, it is easy to ascend and descend using the pit access device 30.

According to the second embodiment, the scaffold base 34 is disposed on the front end side of the ascending / descending step 33 so as to be located in the car projection area 11 when viewed from above in the vertical direction. By using the pit entry / exit device 30, it is possible to easily go up and down, and the inspection workability of the equipment in the pit 2 is improved.
In addition, the scaffold base 34 is configured so as not to interfere with equipment installed in the lower part of the car 3 (the car 7 when the shock absorber 7 is operated) stopped by pushing down the shock absorber 7. Therefore, even if the car 3 goes over the lowest floor for some reason and the shock absorber 7 is pushed down and stopped, the pit entrance device 30 is not damaged.

  In the second embodiment, the case where the number of steps for raising / lowering steps is one has been described. However, the present invention may be applied to the case where the number of steps for raising / lowering steps is plural. In this case, each tip end side of the step for raising and lowering arranged at a height position that does not interfere with the equipment installed below the car 3 (the car 7 when the shock absorber 7 is operated) stopped by pushing down the shock absorber 7 A scaffolding platform may be installed at

Embodiment 3 FIG.
10 is a front view showing an elevator pit exit / entry device according to Embodiment 3 of the present invention, and FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG.

  10 and 11, the backing material 41 is formed by separating the pair of third through holes 25 in the width direction so as to sandwich the flange portion 4 b of the guide rail 4 in addition to the first through holes 23. And five pairs are formed spaced apart from each other in the length direction. On one end side of the base piece 22a of the ascending / descending step 22, a pair of second through holes 24 are drilled in the longitudinal direction with an interval equal to the interval between the third through holes 25 forming a pair. Yes.

  A backing material 41 is disposed with its lower end face butted against the upper end face of the upright piece 9a of the rail mounting plate 9, and its surface is arranged to face the back surface of the flange portion 4b of the guide rail 4, and the shaft portion of the first fastening bolt 16 Is passed through each of the pair of the through hole 15a and the first through hole 23 of the rail clip 15, and the nut 17 screwed to the protruding portion of the shaft portion of the first fastening bolt 16 is fastened to fasten to the guide rail 4. Fixed.

The step 22 for raising / lowering is arranged so that the second through hole 24 overlaps the third through hole 25 and one end side of the base piece 22 a is directed to the back surface of the backing material 21. Then, the shaft portion of the second fastening bolt 35 is passed through the third through hole 25 of the backing material 21 and the second through hole 24 of the lifting / lowering step 22, and the nut is screwed to the protruding portion of the shaft portion of the second fastening bolt 35. 36 is fastened to fix the lifting step 22 to the backing material 21.
Other configurations are the same as those in the first embodiment.

  In the pit access device 40 configured as described above, the backing material 41 is disposed on the back surface of the flange portion 4b of the guide rail 4 and is fastened and fixed to the flange portion 4b by the rail clip 15, the first fastening bolt 16 and the nut 17. ing. Further, the nut of the shaft of the second fastening bolt 35 is passed through the third through hole 25 of the backing material 41 and the second through hole 24 of the lifting / lowering step 22, and is screwed to the protruding portion of the shaft of the second fastening bolt 35. 36 is fastened, and the lifting step 22 is fixed to the backing material 41. Further, the backing material 41 is attached to the guide rail 4 with its lower end abutted against the upper end of the upright piece 9 a of the rail mounting plate 9 that supports the lower end of the guide rail 4. Therefore, the third embodiment also has the same effect as the first embodiment.

  According to the third embodiment, the elevating step 22 is fastened and fixed to the backing material 41 by the second fastening bolt 35. Therefore, the lifting / lowering step 22 can be shipped in a state of being attached to the backing material 41, and the mounting work of the lifting / lowering step 22 on site can be omitted.

  In the third embodiment, the elevating step is fastened and fixed to the backing material by the second fastening bolt, but the elevating step may be fixed to the backing material by welding.

Embodiment 4 FIG.
FIG. 12 is a front view showing an elevator pit exit / entry device according to Embodiment 4 of the present invention.

In FIG. 12, the scaffold base 46 is fixed to the elevating step 33 by welding or the like and is disposed on the tip side of the elevating step 33. Further, the leg 47 is formed so as to protrude downward from the lifting step 33 and the scaffolding base 46, and the lower end thereof is in contact with the pit bottom surface 2a.
Other configurations are the same as those in the second embodiment.

  In the pit access device 45 configured as described above, the shaft portion of the first fastening bolt 16 is passed through the through hole of the rail clip 15, the first through hole of the backing material 32, and the second through hole of the elevating step 33. The nut 17 screwed to the protruding portion of the shaft portion of the one fastening bolt 16 is fastened, and the elevating step 33 is fastened to the guide rail 4 together with the backing material 32. Further, the backing material 32 is attached to the guide rail 4 with its lower end abutted against the upper end of the upright piece 9 a of the rail mounting plate 9 that supports the lower end of the guide rail 4. The scaffold base 46 is disposed on the front end side of the ascending / descending step 33 so as to protrude into the car projection area 11 when viewed from above in the vertical direction. The scaffolding base 46 is configured so as not to interfere with equipment installed in the lower part of the car 3 that pushes down the shock absorber 7 (the car 7 when the shock absorber 7 is operated). Therefore, the fourth embodiment also has the same effect as the second embodiment.

  According to the fourth embodiment, since the lower end of the leg portion 47 protruding downward from the scaffold base 46 is in contact with the pit bottom surface 2 a, the load of the worker is applied to the pit bottom surface 2 a via the scaffold base 46 and the leg portion 47. Can be received.

In the fourth embodiment, the platform is disposed on the tip side of the lifting step so that the platform is located in the car projection area, and the leg is formed so as to protrude downward from the platform. The scaffold base may be omitted, and the leg may be formed so as to protrude downward from the tip side of the lifting step.
In the fourth embodiment described above, the case where the number of steps for raising / lowering steps is one is described, but the present invention may be applied to the case where the number of steps for raising / lowering steps is plural. In this case, a scaffolding platform may be installed on the tip side of the lowest lifting step, and a leg may be installed on the scaffolding platform.

  DESCRIPTION OF SYMBOLS 1 Hoistway, 2 pits, 2a Pit bottom surface, 4 Guide rail, 4b Flange part, 7 Shock absorber, 9 Rail mounting plate, 12 Bottom floor landing, 15 Rail clip, 16 1st fastening bolt, 20, 30, 40, 45 Pit access device, 21, 32 Backing material, 22, 33 Lifting step, 23 First through hole, 24 Second through hole, 25 Third through hole, 35 Second fastening bolt, 34, 46 Scaffolding base, 47 legs Department.

Claims (7)

In the elevator pit entry / exit device for workers to go up and down between the pit of the hoistway and the lowest floor platform,
A pair of first through-holes that are formed in a rectangular flat plate shape wider than the flange portion of the guide rail and spaced apart in the width direction wider than the width of the flange portion are formed in pairs in the length direction. The rail clip is arranged by the fastening force of the first fastening bolt that is disposed on the back surface of the flange portion so that the first through hole is located on both sides of the flange portion in the width direction and is passed through the paired first through hole. A backing material disposed in the pit, fixed to the guide rail by pressing the flange portion between
An elevator step having one end side fixed to the backing material and extending horizontally and installed in the pit in n stages (where n is an integer equal to or greater than 1). Pit access device. The lower end portion of the guide rail is supported on the bottom surface of the pit via a rail mounting plate disposed on the back surface of the flange portion and fixed to the guide rail,
The elevator pit entry / exit device according to claim 1, wherein a lower end surface of the backing material is in contact with an upper end surface of the rail mounting plate. A second through hole is formed on one end side of the lifting step at an interval equal to the interval between the pair of first through holes;
Each of the n steps for raising and lowering is arranged on the back surface of the backing material with the second through hole overlaid on the first through hole, and passed through the first through hole and the second through hole. 2. The flange according to claim 1, wherein the flange portion is pressed and clamped between the rail clip and the guide rail together with the backing material by the fastening force of the first fastening bolt. The elevator pit entry / exit device according to 2. A plurality of pairs of third through holes that are spaced apart in the width direction wider than the width of the flange portion are spaced apart in the length direction of the backing material.
A second through hole is formed on one end side of the step for raising and lowering at an interval equal to the interval between the pair of third through holes;
Each of the n steps for raising and lowering is disposed on the back surface of the backing material with the second through hole overlaid on the third through hole, and passed through the second through hole and the third through hole. 3. The elevator pit entry / exit device according to claim 1, wherein the fastening material is fixed to the backing material by a fastening force of two fastening bolts.   3. The elevator pit entrance / exit device according to claim 1, wherein each of the n stages of lifting steps is fixed to the backing material by welding. A shock absorber is installed on the bottom of the pit,
The raising / lowering step located below the car stopped by pushing down the shock absorber in the n steps of raising / lowering is installed at the tip side under the car stopped by pushing down the shock absorber. 6. The scaffold according to claim 1, further comprising a scaffolding that does not interfere with a device that is present and projects into a projection area of the car as viewed from above in a vertical direction. Elevator pit entry and exit device as described.   2. The lowermost raising / lowering step among the nth raising / lowering steps has a leg portion projecting downward from a tip end side thereof, and the leg portion is in contact with a pit bottom surface. The elevator pit exit / entry device according to claim 6.

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