Securing jig for ladder and securing unit for ladder

Abstract

The present invention provides a securing jig for a ladder and a securing unit for a ladder capable of securing a ladder hung on an opening part adjacent to a threshold for guiding a laterally opening door. This ladder securing jig secures a ladder from a scaffold below a floor to a functional edge from which the ladder is hung in a building provided with a threshold having a groove for guiding the lower edge of a laterally opening door in the functional edge at the side of an opening part in part of the floor adjacent to the opening part. The jig includes: a clamp part which is disposed on a side of the ladder so that a part of the clamp part faces, from among surfaces forming the groove, a groove-side surface that faces away from the opening part, and another part of the clamp part faces an edge-side surface which faces the opening and which faces away from the groove-side surface in the functional edge; and a securing part which extends from the clamp part and secures the ladder from the scaffold to the functional edge from which the ladder is hung. The clamp part is secured to the functional edge by sandwiching a part of the functional edge between the groove-side surface and the edge-side surface.

Description

Ladder Fixtures and Ladder Fixture Units

[0001] The present disclosure relates to a ladder fixing jig and a ladder fixing unit.

[0002] Patent Document 1 discloses a ladder fixing jig. This ladder fixing jig is used when a ladder is hung between a floor that overhangs an opening in excavation work and the scaffolding below. The ladder fixing jig is fixed to the floor so as to grip the upper and lower surfaces of the floor. The ladder fixing jig secures the hung ladder, allowing workers to ascend and descend the ladder safely.

[0003] Japanese Patent Application Publication No. 2015-165066

[0004] For example, in an elevator shaft, which is an opening for an elevator, a ladder may be hung between the pit and the landing on the lowest floor. Generally, the floor of the landing on the lowest floor is connected to the wall of the elevator shaft. On the other hand, the ladder fixing jig described in Patent Document 1 requires that the lower flange contact the underside of the floor. Therefore, the ladder fixing jig cannot be attached to such a floor.

[0005] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a ladder fixing jig and a ladder fixing unit that can fix a ladder hung in an opening adjacent to a threshold that guides a side-opening door.

[0006] The ladder fixing jig of the present disclosure is a jig for fixing a ladder hung from scaffolding below the floor to the working end in a building where the floor adjacent to the opening has a threshold with a groove for guiding the lower end of a side-opening door at the working end on the opening side, and comprises a clamping portion arranged on the side of the ladder so that one part faces the groove side surface that faces away from the opening, and another part faces the end side surface of the working end surface that faces away from the groove side surface and faces the opening, and a fixing portion extending from the clamping portion and fixed to the ladder hung from the scaffolding to the working end, and the clamping portion is fixed to the working end by clamping the part of the working end between the groove side surface and the end side surface.

[0007] The ladder fixing unit of the present disclosure comprises a first fixing jig which is a fixing jig for the ladder described above; a second fixing jig which has a second clamp portion arranged on the side of the ladder with one portion facing the groove side surface and another portion facing the end side surface, and which is fixed to the working end surface by clamping the portion of the working end surface between the groove side surface and the end side surface, and a second fixing portion extending from the second clamp portion and fixed to the ladder hung from the scaffolding to the working end surface, wherein the first fixing jig is arranged on one side of the ladder in the longitudinal direction of the working end surface, and the second fixing jig is arranged on the other side of the ladder opposite the one side in the longitudinal direction of the working end surface.

[0008] According to the present disclosure, the clamping portion is fixed to the working end by clamping the portion of the working end between the groove side surface and the end side surface. The fixing portion extends from the clamping portion and is fixed to the ladder hung from the scaffolding to the working end. This allows the ladder to be fixed to an opening adjacent to a threshold that guides a side-opening door.

[0009] Fig. 1 is a schematic diagram of an elevator device to which a fixing unit according to embodiment 1 is applied. Fig. 2 is a perspective view of a fixing unit and a fixed ladder according to embodiment 1. Fig. 3 is a side view of a first fixing jig according to embodiment 1. Fig. 4 is a perspective view of a fixing unit according to embodiment 1. Fig. 5 is a side view of a second fixing jig and a fixed ladder according to embodiment 1. Fig. 6 is a perspective view of a first fixing jig of a fixing unit according to embodiment 2.

[0010] The embodiments of the present disclosure will be described with reference to the accompanying drawings. In each drawing, the same or corresponding parts are designated by the same reference numerals. Duplicate descriptions of these parts will be appropriately simplified or omitted.

[0011] First Embodiment Fig. 1 is a schematic diagram of an elevator apparatus to which a fixed unit according to a first embodiment is applied.

[0012] For example, the fixed unit 1 is used during maintenance work on the elevator apparatus 100. In the elevator apparatus 100 of Fig. 1, a hoistway 101 passes through a plurality of floors 51 of a building 50. A car (not shown) is provided inside the hoistway 101. The car can move up and down inside the hoistway 101. A pit 102 is provided at the bottom of the hoistway 101. Although not shown, devices related to the elevator apparatus 100, such as a buffer, a governor tension wheel, etc., are provided in the pit 102.

[0013] A plurality of landings 103 are provided on each of the plurality of floors 51. Each of the plurality of landings 103 faces the hoistway 101. On each of the plurality of floors 51, the floor 52 at the landing 103 is provided up to an operating end 52a on the hoistway 101 side. That is, the operating end 52a is the boundary between the floor 52 and the hoistway 101, which is an opening. The floor 52 of the floor 51 is connected to a side wall 53 near the operating end 52a. The side wall 53 is a wall that is on the landing 103 side of the walls that make up the hoistway 101 and extends vertically. The side wall 53 is connected to the ceiling of the floor 51 below. Furthermore, the side wall 53 that extends downward from the floor 52 of the lowest floor 54 of the floors 51 is connected to the pit 102.

[0014] Each of the multiple landing doors 104 is provided at the boundary between the corresponding landing 103 and the elevator shaft 101, i.e., above the working end 52a of the floor 52. The landing doors 104 are side-opening doors. The multiple thresholds 105 correspond to the multiple landing doors 104, respectively. The thresholds 105 are provided below the corresponding landing doors 104 along the opening and closing direction of the corresponding landing doors 104. In other words, the thresholds 105 are provided at the working end 52a of the floor 52 of the corresponding story 51, and are included in the working end 52a. The thresholds 105 have grooves 106. The landing doors 104 open and close while being guided by the thresholds 105 as their lower ends move inside the grooves 106.

[0015] A worker performs part of the maintenance work on the elevator device 100 in the pit 102. For example, in this case, the built-in pit ladder (not shown) may not be available. In this case, the worker uses the ladder 200 that he or she has brought with him or her to move downward from the hoistway 101, which is an opening, and descend to the pit 102.

[0016] The ladder 200 is a typical ladder and includes a pair of vertical columns 201 and multiple horizontal columns 202. In the ladder 200, multiple horizontal columns 202 are arranged parallel to each other between the pair of aligned vertical columns 201. The ladder 200 is hung from the pit 102, which is a scaffolding below the lowest floor 54, across the working end 52a of the floor 52 of the lowest floor 54. That is, the ladder 200 is erected on the floor surface of the pit 102. A portion of the load of the ladder 200 is supported by the floor surface of the pit 102. The central portion of the ladder 200 between the lower end and the upper end contacts the working end 52a. A load perpendicular to the pair of vertical columns 201 of the ladder 200 is supported by the working end 52a. For example, the ladder 200 is hung so that the angle of elevation from the floor surface of the pit 102 to the longitudinal direction is 75 degrees. Generally, for safe use of the ladder 200, it is recommended that the erection angle be 75 degrees.

[0017] The fixing unit 1 is fixed to the working end 52a on which the ladder 200 is hung. The fixing unit 1 fixes the ladder 200 to the working end 52a. Therefore, the fixing unit 1 prevents the ladder 200 from moving in the longitudinal direction of the working end 52a. The fixing unit 1 prevents the ladder 200 from moving in a direction away from the working end 52a. The fixing unit 1 allows the worker to use the ladder 200 with peace of mind.

[0018] Next, the fixing unit 1 will be described with reference to Figures 2 to 5. Figure 2 is a perspective view of the fixing unit and the ladder fixed thereto in embodiment 1. Figure 3 is a side view of the first fixing jig in embodiment 1. Figure 4 is a perspective view of the fixing unit in embodiment 1. Figure 5 is a side view of the second fixing jig and the ladder fixed thereto in embodiment 1.

[0019] The fixing unit 1 comprises a first fixing jig 2 and a second fixing jig 3. In the longitudinal direction of the threshold 105, the first fixing jig 2 is disposed on one side of the ladder 200 hung on the working end 52a. The second fixing jig 3 is disposed on the other side of the ladder 200, opposite the first fixing jig 2. In this state, the first fixing jig 2 and the second fixing jig 3 have bilaterally symmetrical shapes.

[0020] The first fixing jig 2 includes a first clamping portion 4 and a first fixing portion 5. A portion of the first clamping portion 4 is inserted into the groove 106. The inserted portion of the first clamping portion 4 faces a groove side surface 106a, which faces away from the hoistway 101, among the surfaces constituting the groove 106. A portion of the first clamping portion 4, other than the inserted portion, faces an end side surface 52b of the working end 52a. The end side surface 52b is the surface of the working end 52a facing away from the groove side surface 106a and facing the opening of the hoistway 101. In the example shown in FIG. 2 , the working end 52a includes a threshold 105. The end side surface 52b is the surface of the threshold 105 facing the center of the hoistway 101. Although not shown in part, in this example, a vertically downward extending panel 107 is attached to the end side surface 52b.

[0021] The first clamp unit 4 is fixed to the working end 52 a by clamping the portion between the groove side surface 106 a and the end side surface 52 b. In this example, the first clamp unit 4 clamps a portion of the threshold 105 on the hoistway 101 side. The first clamp unit 4 is fixed to the threshold 105.

[0022] The first fixing portion 5 includes a first fixing plate 6 and a first binding body 7. The first fixing plate 6 extends vertically from the first clamp portion 4. The first fixing plate 6 is plate-shaped. In this example, the first fixing plate 6 contacts one of the vertical posts 201 of the ladder 200. The first binding body 7 is shaped like a rope or a band. In the example of Figure 2, the first binding body 7 is a rope-shaped string. The first binding body 7 ties the first fixing plate 6 and one of the vertical posts 201 of the ladder 200 together to secure them to each other. The first binding body 7 may also be a band-shaped lashing belt or the like.

[0023] The second fixing jig 3 includes a second clamping portion 8 and a second fixing portion 9. A portion of the second clamping portion 8 is inserted into the groove 106. The inserted portion of the second clamping portion 8 contacts the groove side surface 106a. Another portion of the second clamping portion 8 contacts the end side surface 52b.

[0024] Similar to the first clamping portion 4, the second clamping portion 8 is fixed to the working end portion 52a by clamping the portion between the groove side surface 106a and the end side surface 52b.

[0025] The second fixing portion 9 includes a second fixing plate 10 and a second binding body 11. The second fixing plate 10 extends vertically from the second clamp portion 8. The second fixing plate 10 is plate-shaped. In this example, the second fixing plate 10 contacts the other end of the vertical post 201 of the ladder 200. The second binding body 11 is strip-shaped or band-shaped. In the example of FIG. 2, the second binding body 11 is a strip-shaped cord, similar to the first binding body 7. The second binding body 11 ties the second fixing plate 10 and the other end of the vertical post 201 of the ladder 200 together to secure them together. The second binding body 11 may also be a band-shaped lashing belt or the like.

[0026] 3, the first clamping portion 4 of the first fixing jig 2 includes a first base 12, a first protrusion 13, a first support 14, a first movable body 15, and a first buffer body 16. For example, the first base 12 has a plate shape. The first base 12 has a length equal to or greater than the distance from the groove side surface 106a to the end side surface 52b (not shown in FIG. 3).

[0027] The first protrusions 13 extend from the first base 12 perpendicular to the longitudinal direction of the first base 12. In the example of Fig. 3, the first protrusions 13 extend from the longitudinal end portions of the first base 12. Note that the first protrusions 13 may extend from portions of the first base 12 that are not the end portions.

[0028] The first support 14 extends from the first base 12 in the same direction as the first protrusion 13. In the example of Fig. 3, the first support 14 extends from the end of the first base 12 on the opposite side in the longitudinal direction from the first protrusion 13. A through hole 14a is provided in the first support 14 in the direction of the first protrusion 13. The through hole 14a is a female thread.

[0029] The first movable body 15 includes a first screw 17 and a first contact body 18. The first screw 17 is passed through the through hole 14a. In this state, the first protrusion 13 is located on an extension of the rotation axis of the first screw 17. It is more preferable that the end of the first protrusion 13 is located on an extension of the rotation axis of the first screw 17. The first contact body 18 is provided at the end of the first screw 17 on the side of the first protrusion 13. A first contact surface 18a of the first contact body 18 faces the first protrusion 13. A first buffer member 18b made of rubber or the like is attached to the first contact surface 18a. The shape of the first contact body 18 may be circular, rectangular, or any other shape.

[0030] The first contact body 18 of the first moving body 15 can move forward and backward relative to the first protruding body 13 by rotating the first screw 17 .

[0031] For example, the first buffer 16 is a rubber plate. The first buffer 16 entirely covers the surface of the first base 12 from which the first protrusion 13 protrudes and the surface of the first protrusion 13. Note that the first protrusion 13 covered by the first buffer 16 may be considered to be the first protrusion 13 itself.

[0032] The first fixing plate 6 extends from the first base 12 on the side opposite to the first protrusion 13. For example, the first fixing plate 6 extends perpendicular to the first base 12 from the end of the side along the longitudinal direction of the first base 12.

[0033] Two oblong holes 6a are provided in the first fixing plate 6. The two oblong holes 6a are arranged parallel to each other along the longitudinal direction of the first base body 12. That is, two center lines 6b, indicated by dashed lines, of the two oblong holes 6a are parallel to each other. The center line 6b is a line indicating the center portion of the oblong holes 6a in the lateral direction. The angle of the center line 6b with respect to the first base body 12 is preferably between 60 and 75 degrees. The size of the oblong holes 6a is such that a first binding body 7 (not shown in FIG. 3) can pass through it. In particular, when the first binding body 7 is a lashing belt, the longitudinal length of the oblong holes 6a is longer than the width of the lashing belt.

[0034] For example, the distance between the two center lines 6b may be the difference between the minimum and maximum expected distances from the groove side surface 106a to the end side surface 52b. Specifically, depending on the expected type of threshold 105, the distance from the groove side surface 106a to the end side surface 52b may be any value between 25 mm and 75 mm. In this case, two elongated holes 6a may be provided so that the distance between the two center lines 6b is 50 mm. This allows the first fixing jig 2 to be used in a variety of expected construction sites.

[0035] 4 , the second clamping portion 8 of the second fixing jig 3 includes a second base 19, a second protrusion 20, a second support 21, a second moving body 22, and a second buffer 23. The second base 19, the second protrusion 20, the second support 21, the second moving body 22, and the second buffer 23 have the same configurations as the first base 12, the first protrusion 13, the first support 14, the first moving body 15, and the first buffer 16, respectively. For example, the second moving body 22 has a second screw 24 and a second contact body 25. The second screw 24 and the second contact body 25 have the same configurations as the first screw 17 and the first contact body 18, respectively.

[0036] The second fixing plate 10 extends from the second base 19 on the side opposite to the second protrusion 20. For example, the second fixing plate 10 extends perpendicular to the second base 19 from an end of a longitudinal side of the second base 19. The second fixing plate 10 extends from a side of the second base 19 that corresponds to the side opposite to the side along which the first fixing plate 6 extends from the first base 12. Two elongated holes 10a are formed in the second fixing plate 10. The two elongated holes 10a have the same shape as the two elongated holes 6a formed in the first fixing plate 6.

[0037] In this way, the first fixing jig 2 and the second fixing jig 3 have a symmetrical shape in which the positional relationship between the first fixing plate 6 and the second fixing plate 10 relative to the respective clamping portions is reversed.

[0038] 5 shows the second fixing jig 3 fixed to the working end 52a. When the second fixing jig 3 is attached to the working end 52a, the second protrusion 20 is first placed inside the groove 106 on the other side of the ladder 200. The second contact body 25 is located between the second support 21 and the end side surface 52b. At this time, the second fixing jig 3 is positioned so that the second fixing plate 10 contacts the other side of the vertical column 201 of the ladder 200.

[0039] Thereafter, by rotating the second screw 24, the second contact body 25 advances and moves toward the end side surface 52b. After the second protrusion 20 and the groove side surface 106a come into contact via the second buffer body 23 and the second contact body 25 and the end side surface 52b come into contact, the second screw 24 continues to be rotated, generating a force between the second protrusion 20 and the second contact body 25 that grips the working end 52a. In this way, the second clamping portion 8 clamps the working end 52a and is fixed to the working end 52a. In particular, the working end 52a grips the framework portion that supports the header panel 107, thereby firmly fixing the second clamping portion 8.

[0040] Then, a second binding body 11 is wrapped around the second fixing plate 10 and the vertical post 201 of the ladder 200. In the example shown in FIG. 5 , the second binding body 11 is a lashing belt. The longitudinal direction of the elongated hole 10a is parallel to the longitudinal direction of the vertical post 201. The ladder 200 is fixed to the second fixing jig 3 by the second binding body 11. Because the ladder 200 is in contact with the second fixing plate 10, there is no risk of the ladder 200 shifting toward the second fixing jig 3 along the longitudinal direction of the working end 52a. The contact area between the lashing belt and the vertical post 201 is relatively large compared to the contact area between the second binding body 11 and the vertical post 201 when the second binding body 11 is string-like. This prevents the vertical post 201 from sliding longitudinally relative to the second fixing jig 3.

[0041] Although not shown, on one side of the ladder 200, the first fixing jig 2 is fixed to the working end 52a in the same manner as the second fixing jig 3. Then, the ladder 200 is fixed to the first fixing jig 2 in the same manner as the second fixing jig 3. Because the ladder 200 contacts the first fixing plate 6, there is no risk of the ladder 200 shifting position toward the first fixing jig 2 along the longitudinal direction of the working end 52a.

[0042] According to the first embodiment described above, the first fixing jig 2, which is a fixing jig for a ladder, includes the first clamp portion 4 and the first fixing portion 5. The ladder 200 is leaned against the working end portion 52a, on which the threshold 105 that guides the side-opening landing door 104 is provided. The first clamp portion 4 is fixed to the working end portion 52a by clamping the portion between the groove side surface 106a and the end side surface 52b of the groove 106. The first fixing portion 5 is fixed to the ladder 200. Therefore, the ladder 200 is fixed to the working end portion 52a. In other words, the fixing jig can fix a ladder hung over an opening adjacent to the threshold that guides the side-opening door.

[0043] For example, the ladder fixing jig described in Patent Document 1, which is a conventional example, cannot clamp the floor 52 from above and below because the side wall 53 connected to the floor 52 interferes. Therefore, this ladder fixing jig cannot fix the ladder 200 in this example to the threshold 105. On the other hand, the first fixing jig 2 can be fixed to the threshold 105 because it holds the working end 52a horizontally.

[0044] The first clamping unit 4 has a first base 12, a first protruding body 13, a first support body 14, and a first moving body 15. The working end 52a is sandwiched between the first protruding body 13 and the first moving body 15. Therefore, the first fixing jig 2 can be easily positioned at the fixed position.

[0045] The first fixing portion 5 has a first fixing plate 6 and a first binding body 7. The first binding body 7 is passed through the long hole 6a of the first fixing plate 6 to bind the vertical post 201 of the ladder 200 to the first fixing plate 6. This allows the ladder 200 to be easily and firmly fixed.

[0046] The angle that the slot 6a makes with the first base 12 is 75 degrees. Generally, the ladder 200 is erected at an erection angle of 75 degrees. By making the longitudinal direction of the slot 6a parallel to the vertical post 201, the first binding body 7 can be passed through the slot 6a without twisting. As a result, the ladder 200 can be stably fixed.

[0047] The first fixing jig 2 is applied to the ladder 200 hung between the pit 102 of the hoistway 101 of the elevator device 100 and the working end 52a of the lowest floor 54. During maintenance work on the elevator device 100, a worker may have to turn his / her body around near the area between the landing 103 and the ladder 200. This type of work can be particularly cramped when the landing door 104 is narrow, and the ladder 200 is likely to become unstable. By using the first fixing jig 2, the worker can safely use the ladder 200.

[0048] The fixing unit 1 and the fixing jig can also be applied to situations other than the ladder 200 hung between the lowest floor 54 and the pit 102. For example, they can also be applied to the ladder 200 hung on a threshold 105 provided on one of the floors 51, using the top surface of the car as a foothold, instead of the pit 102. Furthermore, the fixing unit 1 and the fixing jig can be applied to a ladder in which a threshold for guiding a side-opening door is hung on the working end adjacent to the opening, such as the landing 103 of the elevator device 100. For example, the fixing unit 1 and the fixing jig can be applied to a luggage door provided on the second or higher floor of a building and not connected to a staircase, etc., if a side-opening door threshold exists.

[0049] The fixing unit 1 also includes a first fixing jig 2 and a second fixing jig 3. The first fixing jig 2 and the second fixing jig 3 are respectively disposed on both sides of the ladder 200 and fixed to the working end 52a. This prevents the position of the fixing unit 1 from shifting in the longitudinal direction of the threshold 105. As a result, the ladder 200 can be stabilized when leaned against it.

[0050] The first fixing jig 2 further includes a first buffer 16. Each component of the first clamping unit 4 contacts the groove 106 of the threshold 105 via the first buffer 16. The threshold 105 is typically made of a material such as aluminum or stainless steel. Therefore, the threshold 105 is prone to scratches, such as dents. Because the threshold 105 is firmly fixed to the floor 52, replacing the threshold 105 is a large-scale, costly undertaking. The provision of the first buffer 16 prevents the first clamping unit 4 from damaging the threshold 105.

[0051] Embodiment 2. Figure 6 is a perspective view of a first fixing jig of a fixing unit in embodiment 2. Note that parts that are the same as or equivalent to parts in embodiment 1 are given the same reference numerals, and a description of these parts will be omitted.

[0052] 6 , in the second embodiment, the first fixing portion 5 of the first fixing jig 2 is different from the first fixing portion 5 in the first embodiment. The first fixing portion 5 includes a first gripping portion 30 and a first rotating portion 31.

[0053] The first gripping unit 30 can grip an object with the two gripping bodies 30a. For example, the first gripping unit 30 can grip a vertical post 201 of a ladder 200 (not shown in FIG. 6).

[0054] The first rotating part 31 is attached to the first base 12 of the first clamping part 4. The first rotating part 31 is attached at a lower mounting part 31a so as to be rotatable and pivotable relative to the first base 12. The first rotating part 31 supports the first gripping part 30. The first rotating part 31 supports the first gripping part 30 at an upper mounting part 31b so that the first gripping part 30 is rotatable and pivotable relative to the first rotating part 31. By tightening the first adjusting screw 31c, the first rotating part 31 is fixed to the first base 12. By tightening the first adjusting screw 31c, the first gripping part 30 is fixed to the first rotating part 31. In other words, by tightening the first adjusting screw 31c, the relative distance and attitude of the first gripping part 30 with respect to the first clamping part 4 are fixed.

[0055] Although not shown, the second fixing jig 3 may also be provided with a second gripping portion and a second rotating portion, which have the same configuration as the first fixing jig 2 .

[0056] Although not shown, after the ladder 200 is hung on the working end 52a, the first clamp unit 4 of the first fixing jig 2 is fixed to the working end 52a in the same manner as in the first embodiment. Then, while being rotated and swiveled by the first rotating unit 31, the first gripping unit 30 is positioned at a position where it can grip the vertical post 201 of the ladder 200. Then, by operation by a worker, the first gripping unit 30 grips the vertical post 201. Then, by tightening the first adjustment screw 31c, the first gripping unit 30 is fixed to the first clamp unit 4. In this state, the ladder 200 is fixed to the first fixing jig 2.

[0057] The same operation may be performed on the second fixing jig 3 as well.

[0058] According to the second embodiment described above, the first fixing portion 5 of the first fixing jig 2 has the first rotating portion 31 and the first gripping portion 30. The first gripping portion 30 can be fixed in any orientation relative to the first base 12. Therefore, the first fixing portion 5 can be fixed to the ladder 200 leaning against it at various angles.

[0059] As described above, the fixed unit 1 according to the present disclosure can be used for leaning a ladder against something.

[0060] REFERENCE SIGNS LIST 1 Fixing unit, 2 First fixing jig, 3 Second fixing jig, 4 First clamping portion, 5 First fixing portion, 6 First fixing plate, 6a Long hole, 6b Center line, 7 First binding body, 8 Second clamping portion, 9 Second fixing portion, 10 Second fixing plate, 10a Long hole, 11 Second binding body, 12 First base, 13 First protrusion, 14 First support, 14a Through hole, 15 First moving body, 16 First buffer body, 17 First screw, 18 First contact body, 18a First contact surface, 18b First buffer member, 19 Second base, 20 Second protrusion, 21 Second support, 22 Second moving body, 23 Second buffer body, 24 Second screw, 25 Second contact body, 30 First gripping portion, 30a gripping body, 31 first rotating portion, 31a lower mounting portion, 31b upper mounting portion, 31c first adjusting screw, 50 building, 51 floor, 52 floor, 52a working end portion, 52b end side surface, 53 side wall, 54 lowest floor, 100 elevator device, 101 hoistway, 102 pit, 103 landing, 104 landing door, 105 threshold, 106 groove, 106a groove side surface, 107 fascia, 200 ladder, 201 vertical pillar, 202 horizontal pillar

Claims

1. In a building where a threshold having a groove for guiding the lower end of a side-opening door is provided at the working end of a floor adjacent to an opening, a jig is provided to fix a ladder hung from a scaffolding located below the floor to the working end, a clamp portion arranged on the side of the ladder so that a portion faces a groove side surface facing away from the opening among the surfaces that constitute the groove, and another portion faces an end side surface facing the opening, which is a surface at the working end that faces away from the groove side surface; A fixing portion extending from the clamp portion and fixed to the ladder hung from the scaffolding to the working end portion; Equipped with The clamp portion is a base having a length equal to or greater than the distance from the groove side surface to the end side surface; a protrusion extending from the base; a support extending from the base in the same direction as the protrusions; a movable body extending from the support body so as to be movable toward and away from the protruding body; the protrusion faces the groove side surface, the moving body faces the end side surface, and the protrusion and the moving body sandwich a portion of the working end between the groove side surface and the end side surface, thereby being fixed to the working end surface, The fixing portion is a fixing plate extending from the base in a direction opposite to the protrusion and having a slot; A string-like binding body that is passed through the long hole and binds the fixing plate and the vertical post of the ladder together; A ladder fixing jig having the above structure.

2. In a building in which a threshold having a groove for guiding the lower end of a side-opening door is provided at the working end of a floor adjacent to the opening, a jig for fixing a ladder hung from a scaffolding located below the floor to the working end, a clamp portion arranged on the side of the ladder so that a portion faces a groove side surface facing away from the opening among the surfaces that constitute the groove, and another portion faces an end side surface facing the opening, which is a surface at the working end that faces away from the groove side surface; A fixing portion extending from the clamp portion and fixed to the ladder hung from the scaffolding to the working end portion; Equipped with The clamp portion is a base having a length equal to or greater than the distance from the groove side surface to the end side surface; a protrusion extending from the base; a support extending from the base in the same direction as the protrusions; a movable body extending from the support body so as to be movable toward and away from the protruding body; the protrusion faces the groove side surface, the moving body faces the end side surface, and the protrusion and the moving body sandwich a portion of the working end between the groove side surface and the end side surface, thereby being fixed to the working end surface, The fixing portion is a fixing plate extending from the base in a direction opposite to the protrusion and having a slot; A band-shaped binding body that is passed through the long hole and binds the fixing plate and the vertical post of the ladder together; A ladder fixing jig having the above structure.

3. 3. A ladder fixing jig as claimed in claim 2, wherein the angle formed by the longitudinal direction of said slot with respect to said base is 75 degrees.

4. The floor is the lowest floor of the building, the door is an elevator landing door, the opening is a shaft of the elevator, A ladder fixing jig as claimed in any one of claims 1 to 3, wherein the scaffolding is a pit for the elevator shaft.

5. A first fixing jig which is a fixing jig for a ladder according to claim 1 or 2; a second clamping portion that is arranged on the side of the ladder so that one portion faces the groove side surface and another portion faces the end side surface, and is fixed to the working end surface by clamping the portion of the working end surface between the groove side surface and the end side surface; and a second fixing portion that extends from the second clamping portion and is fixed to the ladder that is hung from the scaffolding to the working end surface; Equipped with The first fixing jig is arranged on one side of the ladder in the longitudinal direction of the working end, The second fixing jig is a ladder fixing unit arranged on the other side of the ladder opposite to the one side in the longitudinal direction of the working end.