Ladder fixing jig and ladder fixing unit

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

Technical Field

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

Background Art

[0002] Patent Document Ⅰ discloses a ladder fixing jig. When a ladder is hung between a floor projecting over an opening and a scaffold below it in excavation work or the like, the ladder fixing jig is used. 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 fixes the hung ladder. Thus, an operator can safely move up and down the ladder.

Prior Art Documents

Patent Documents

[0003]

Patent Document Ⅰ

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, in a hoistway which is an opening of an elevator, a ladder may be hung between a pit and a landing of the lowest floor. Generally, the floor of the landing of the lowest floor is connected to the wall of the hoistway. On the other hand, the ladder fixing jig described in Patent Document Ⅰ needs to have a lower flange contact the lower surface portion 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 problems. An object of the present disclosure is to provide a ladder fixing jig and a ladder fixing unit capable of fixing a ladder hung on an opening adjacent to a sill guiding a horizontally sliding door.

Means for Solving the Problems

[0006] The ladder fixing jig according to this disclosure is a jig for fixing a ladder that is placed on the working end from scaffolding below the floor to the working end in a building where a threshold is provided on the working end side of the floor adjacent to the opening, and the working end has a groove that guides the lower end of a horizontally opening door, and the clamp portion is positioned on the side of the ladder such that a part of it faces the groove side facing away from the opening, and another part of it faces the end side facing the opening, which is the opposite side of the groove side at the working end, and the clamp portion extends from the clamp portion and is placed on the working end from the scaffolding The clamp comprises a fixing part that is fixed to the kicked ladder, the clamp part having a base body having a length greater than the distance from the groove side to the end side, a projection extending from the base body, a support extending from the base body in the same direction as the projection, and a movable part extending from the support so as to be able to move back and forth in the direction of the projection, the projection facing the groove side and the movable part facing the end side, and the working end is fixed by the projection and the movable part sandwiching the portion of the working end between the groove side and the end side, the fixing part comprises a fixing plate that extends from the base body in the direction opposite to the projection and has an elongated hole, long It is passed through the hole and used to connect and secure the fixing plate and the vertical posts of the ladder to each other. Made of string It had a binding body and Furthermore, the ladder fixing jig according to this disclosure is a jig for fixing a ladder placed on the working end from scaffolding below the floor to the working end in a building where a threshold is provided on the working end of the floor adjacent to the opening, which has a groove in which the lower end of a horizontally opening door is guided, and comprises a clamp portion positioned on the side of the ladder such that a part of the groove faces the groove side facing away from the opening, and another part faces the end side facing the opening, which is the side of the working end that faces away from the groove side, and a fixing portion extending from the clamp portion and fixed to the ladder placed on the working end from the scaffolding, The clamp comprises a base having a length greater than the distance from the groove side to the end side, a projection extending from the base, a support extending from the base in the same direction as the projection, and a movable body extending from the support so as to be able to move back and forth in the direction of the projection, with the projection facing the groove side and the movable body facing the end side, and fixed to the working end by clamping the portion of the working end between the groove side and the end side between the projection and the movable body, and the fixing part comprises a fixing plate extending from the base in the direction opposite to the projection and having an elongated hole, and a fastening body having a strip shape that is passed through the elongated hole and connects and fixes the fixing plate and the vertical column of the ladder to each other.

[0007] The ladder fixing unit according to this disclosure comprises a first fixing jig which is a fixing jig for the ladder described above, and a second fixing jig which is positioned on the side of the ladder such that a part of it faces the groove side and another part faces the end side, and is fixed to the working end by clamping the portion of the working end between the groove side and the end side, and a second fixing part which extends from the second clamp and is fixed to the ladder that is hung from the scaffolding to the working end, wherein the first fixing jig is positioned on one side of the ladder in the longitudinal direction of the working end, and the second fixing jig is positioned on the other side of the ladder opposite to the one side in the longitudinal direction of the working end. [Effects of the Invention]

[0008] According to this disclosure, the clamp portion is fixed to the working end by clamping the portion of the working end between the groove side and the end side. The fixing portion extends from the clamp portion and is fixed to the ladder that is placed on the working end from the scaffolding. Therefore, a ladder placed on an opening adjacent to a threshold that guides a side-opening door can be fixed. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram of an elevator system to which the fixed unit in Embodiment 1 is applied. [Figure 2] This is a perspective view of the fixed unit and the fixed ladder in Embodiment 1. [Figure 3] This is a side view of the first fixing jig in Embodiment 1. [Figure 4] This is a perspective view of the fixed unit in Embodiment 1. [Figure 5] This is a side view of the second fixing jig and the fixed ladder in Embodiment 1. [Figure 6] This is a perspective view of the first fixing jig of the fixing unit in Embodiment 2. [Modes for carrying out the invention]

[0010] The embodiments for implementing this disclosure will be described with reference to the attached drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. The explanation of such parts will be simplified or omitted as appropriate.

[0011] Embodiment 1. Figure 1 is a schematic diagram of an elevator system to which the fixed unit in Embodiment 1 is applied.

[0012] For example, the fixed unit 1 is used during maintenance work on the elevator system 100. In the elevator system 100 shown in Figure 1, the hoistway 101 penetrates multiple floors 51 of the building 50. The elevator car, which is not shown, is installed inside the hoistway 101. The elevator 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, the pit 102 is equipped with equipment related to the elevator system 100, such as buffers and governor tensioners.

[0013] Multiple landings 103 are provided on multiple floor levels 51. Each of the multiple landings 103 faces the elevator shaft 101. On each of the multiple floor levels 51, the floor 52 of the landing 103 extends to the working end 52a on the elevator shaft 101 side. That is, the working end 52a is the boundary between the floor 52 and the elevator shaft 101, which is an opening. The floor 52 of floor level 51 connects to a side wall 53 near the working end 52a. The side wall 53 is the wall on the landing 103 side of the elevator shaft 101 and extends vertically. The side wall 53 connects to the ceiling of the floor level 51 below. Also, the side wall 53 that extends downward from the floor 52 of the lowest floor level 54 of the floor levels 51 connects to the pit 102.

[0014] Each of the multiple landing doors 104 is located above 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. Each of the multiple sills 105 corresponds to one of the multiple landing doors 104. The sills 105 are located below the landing doors 104, along the opening and closing direction of the corresponding landing door 104. That is, the sills 105 are located at and included in the working end 52a of the floor 52 of the corresponding floor 51. The sills 105 have grooves 106. The landing doors 104 open and close as their lower ends move inside the grooves 106, guided by the sills 105.

[0015] An operator performs part of the maintenance work of the elevator device 100 in the pit 102. For example, in this case, the installation pit ladder (not shown) may not be available. In this case, the operator uses the brought-in ladder 200 to move downward from the hoistway 101, which is an opening, and descend into the pit 102.

[0016] The ladder 200 is a general ladder and includes a pair of vertical columns 201 and a plurality of horizontal columns 202. In the ladder 200, a plurality of horizontal columns 202 are arranged parallel to each other between the pair of juxtaposed vertical columns 201. The ladder 200 is hung from the pit 102, which is a scaffold below the lowest floor 54, to the working end portion 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 part of the load of the ladder 200 is supported by the floor surface of the pit 102. The central portion between the lower end and the upper end of the ladder 200 contacts the working end portion 52a. The load in the direction perpendicular to the pair of vertical columns 201 of the ladder 200 is supported by the working end portion 52a. For example, the ladder 200 is hung so that the standing angle from the floor surface of the pit 102 to the longitudinal direction is 75 degrees. Generally, in order to use the ladder 200 safely, it is recommended that the standing angle be 75 degrees.

[0017] The fixing unit 1 is fixed to the working end portion 52a to which the ladder 200 is hung. The fixing unit 1 fixes the ladder 200 to the working end portion 52a. Therefore, the fixing unit 1 prevents the ladder 200 from moving in the longitudinal direction of the working end portion 52a. The fixing unit 1 prevents the ladder 200 from moving away from the working end portion 52a. With the fixing unit 1, the operator can use the ladder 200 with confidence.

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

[0019] The fixing unit 1 includes 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 with respect to the ladder 200 hung on the working end portion 52a. The second fixing jig 3 is disposed on the other side opposite to the first fixing jig 2 with respect to the ladder 200. In this state, the first fixing jig 2 and the second fixing jig 3 have a bilaterally symmetric shape.

[0020] The first fixing jig 2 includes a first clamp portion 4 and a first fixing portion 5. A part of the first clamp portion 4 is inserted into the inside of the groove 106. The inserted part of the first clamp portion 4 faces the groove side surface 106a that faces away from the lifting path 101 among the surfaces constituting the groove 106. Another part of the first clamp portion 4 other than the inserted part faces the end side surface 52b at the working end portion 52a. The end side surface 52b is a surface of the working end portion 52a that faces away from the groove side surface 106a and faces the lifting path 101 which is an opening. In the example shown in FIG. 2, the threshold 105 is included in the working end portion 52a. The end side surface 52b is a surface of the threshold 105 that faces the central portion of the lifting path 101. Although some illustrations are omitted, in this example, a curtain plate 107 extending vertically downward is attached to the end side surface 52b.

[0021] The first clamp portion 4 is fixed to the working end portion 52a by sandwiching the portion between the groove side surface 106a and the end side surface 52b. In this example, the first clamp portion 4 sandwiches a part of the threshold 105 on the side of the lifting path 101. The first clamp portion 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 has a plate shape. In this example, the first fixing plate 6 contacts one of the vertical columns 201 of the ladder 200. The first binding body 7 cord-like or has a belt shape. In the example of FIG. 2, the first binding body 7 cord-like is a string presenting. The first binding body binds the first fixing plate 6 and one of the vertical columns 201 of the ladder 200 to fix them to each other. Note that the first binding body 7 may be a lashing belt or the like presenting a belt shape.

[0023] The second fixing jig 3 comprises 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 is in contact with the groove side surface 106a. Another portion of the second clamping portion 8 is in contact with the end side surface 52b.

[0024] The second clamp 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, similar to the first clamp portion 4.

[0025] The second fixing section 9 comprises a second fixing plate 10 and a second fastening body 11. The second fixing plate 10 extends vertically from the second clamp section 8. The second fixing plate 10 is plate-shaped. In this example, the second fixing plate 10 is in contact with the other side of the vertical column 201 of the ladder 200. The second fastening body 11 is cord-like Alternatively, it may take the form of a band. In the example in Figure 2, the second binding body 11 is similar to the first binding body 7, cord-like It is a cord that exhibits the characteristics of a string. The second fastening body 11 connects the second fixing plate 10 and the other vertical column 201 of the ladder 200, thereby securing them to each other. The second fastening body 11 may be a lashing belt or the like that exhibits the characteristics of a strip.

[0026] As shown in Figure 3, the first clamp portion 4 of the first fixing jig 2 comprises a first base 12, a first projection 13, a first support 14, a first movable body 15, and a first buffer 16. For example, the first base 12 is plate-shaped. The first base 12 has a length greater than or equal to the distance from the groove side surface 106a (not shown in Figure 3) to the end side surface 52b.

[0027] The first projection 13 extends from the first base 12 perpendicular to the longitudinal direction of the first base 12. In the example shown in Figure 3, the first projection 13 extends from the longitudinal end of the first base 12. However, the first projection 13 may also extend from a part of the first base 12 other than the end.

[0028] The first support 14 extends from the first base 12 in the same direction as the first projection 13. In the example shown in Figure 3, the first support 14 extends from the end of the first base 12 opposite to the first projection 13 in the longitudinal direction. The first support 14 is provided with a through hole 14a in the direction of the first projection 13. The through hole 14a is a female thread.

[0029] The first movable body 15 comprises a first screw 17 and a first contact body 18. The first screw 17 is passed through a through hole 14a. In this state, the first projection 13 is located on the extension of the rotation axis of the first screw 17. It is more preferable that the end of the first projection 13 is located on the 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 projection 13. The first contact surface 18a of the first contact body 18 faces the first projection 13. A first cushioning member 18b, such as rubber, is attached to the first contact surface 18a. The shape of the first contact body 18 may be circular, or it may be any shape such as a rectangle.

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

[0031] For example, the first buffer 16 is a rubber plate. The first buffer 16 covers the entire surface of the first base 12 on which the first projection 13 protrudes, and the surface of the first projection 13 itself. The first projection 13 covered by the first buffer 16 may be considered as the first projection 13 itself.

[0032] The first fixing plate 6 extends from the first base 12 to the side opposite to the first projection 13. For example, the first fixing plate 6 extends perpendicularly to the first base 12 from the end of an edge along the longitudinal direction of the first base 12.

[0033] The first fixing plate 6 is provided with two elongated holes 6a. The two elongated holes 6a are arranged parallel to each other in the longitudinal direction of the first base body 12. That is, for the two elongated holes 6a, the two centerlines 6b, indicated by the dashed lines, are parallel to each other. The centerlines 6b are lines that indicate the central portion in the short direction of the elongated holes 6a. The angle made by the centerlines 6b with respect to the first base body 12 is preferably an angle between 60 and 75 degrees. The size of the elongated holes 6a is such that the first binding body 7, which is not shown in Figure 3, can pass through. In particular, if the first binding body 7 is a lashing belt, the length of the elongated holes 6a in the longitudinal direction is longer than the width of the lashing belt.

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

[0035] As shown in Figure 4, the second clamp portion 8 of the second fixing jig 3 comprises a second base 19, a second projection 20, a second support 21, a second movable body 22, and a second buffer 23. The second base 19, second projection 20, second support 21, second movable body 22, and second buffer 23 have similar configurations to the first base 12, first projection 13, first support 14, first movable body 15, and first buffer 16, respectively. For example, the second movable body 22 has a second screw 24 and a second contact body 25. The second screw 24 and the second contact body 25 have similar configurations to 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 projection 20. For example, the second fixing plate 10 extends perpendicularly to the second base 19 from the end of a longitudinal side of the second base 19. The second fixing plate 10 extends from the side of the second base 19 that corresponds to the side of the first fixing plate 6 that is opposite to the side of the first base 12 that the first fixing plate 6 extends from. The second fixing plate 10 is provided with two elongated holes 10a. The two elongated holes 10a have the same shape as the two elongated holes 6a provided in the first fixing plate 6.

[0037] Thus, 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 with respect to their respective clamping parts is reversed.

[0038] Figure 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, first the second projection 20 is positioned inside the groove 106 on the other side of the ladder 200. The second contact body 25 is positioned 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 is in contact with the other side of the vertical column 201 of the ladder 200.

[0039] Subsequently, as the second screw 24 is rotated, the second contact body 25 moves forward and towards the end side surface 52b. The second projection 20 and the groove side surface 106a come into contact via the second buffer 23, and even after the second contact body 25 and the end side surface 52b come into contact, the second screw 24 continues to rotate, generating a gripping force between the second projection 20 and the second contact body 25 on 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 second clamping portion 8 is firmly fixed by gripping the frame portion that supports the fascia board 107 at the working end 52a.

[0040] Subsequently, the second fastening body 11 is wrapped around the second fixing plate 10 and the vertical column 201 of the ladder 200. In the example shown in Figure 5, the second fastening body 11 is a lashing belt. The longitudinal direction of the elongated hole 10a is parallel to the longitudinal direction of the vertical column 201. The ladder 200 is fixed to the second fixing jig 3 by the second fastening body 11. Because it is in contact with the second fixing plate 10, there is no risk of the ladder 200 shifting towards the second fixing jig 3 along the longitudinal direction of the working end 52a. The contact area between the lashing belt and the vertical column 201 is relatively large compared to the contact area between the second fastening body 11 and the vertical column 201 when the second fastening body 11 is in the form of a string. Therefore, the vertical column 201 is prevented from sliding longitudinally relative to the second fixing jig 3.

[0041] Although not shown in the diagram, the first fixing jig 2 is fixed to the working end 52a on one side of the ladder 200 in the same way as the second fixing jig 3. Subsequently, the ladder 200 is fixed to the first fixing jig 2 in the same way as the second fixing jig 3. Because it is in contact with the first fixing plate 6, there is no risk of the ladder 200 shifting towards the first fixing jig 2 along the longitudinal direction of the working end 52a.

[0042] According to Embodiment 1 described above, the first fixing jig 2, which is a fixing jig for the ladder, comprises a first clamp portion 4 and a first fixing portion 5. The ladder 200 is leaned against the working end portion 52a, which is provided with a sill 105 that guides a horizontally opening landing door 104. The first clamp portion 4 is fixed to the working end portion 52a by clamping the portion of the groove 106 between the groove side surface 106a and the end side surface 52b. 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 that is hung over an opening adjacent to a sill that guides a horizontally opening door.

[0043] For example, the ladder fixing jig described in Patent Document 1, a conventional example, cannot clamp the floor 52 from above or 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 grips the working end 52a in the horizontal direction.

[0044] Furthermore, the first clamp portion 4 includes a first base 12, a first projection 13, a first support 14, and a first movable body 15. The working end portion 52a is clamped between the first projection 13 and the first movable body 15. Therefore, the first fixing jig 2 can be easily positioned at the location where it will be fixed.

[0045] Furthermore, the first fixing section 5 includes a first fixing plate 6 and a first fastening body 7. The first fastening body 7 is passed through the elongated hole 6a of the first fixing plate 6, and fastens the vertical column 201 of the ladder 200 to the first fixing plate 6. This allows the ladder 200 to be fixed easily and securely.

[0046] Furthermore, the angle that the elongated hole 6a makes with respect to the first base 12 is 75 degrees. Generally, the ladder 200 is erected with an upright angle of 75 degrees. Since the longitudinal direction of the elongated hole 6a is parallel to the vertical column 201, the first fastening body 7 can be passed through the elongated hole 6a without twisting. As a result, the ladder 200 can be stably fixed.

[0047] Furthermore, the first fixing jig 2 is applied to the ladder 200 that is placed 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, workers sometimes have to turn their bodies around near the area between the landing 103 and the ladder 200. Such 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, workers can use the ladder 200 safely.

[0048] Furthermore, the fixing unit 1 and fixing jig can also be applied to situations where the ladder 200 is not placed between the lowest floor 54 and the pit 102. For example, it can be applied to a ladder 200 that is placed on a sill 105 provided on any floor 51, using the top surface of the elevator car as a foothold, rather than on the pit 102. Also, if the sill that guides a side-opening door, such as the landing 103 of the elevator device 100, is placed on the working end adjacent to the opening, the fixing unit 1 and fixing jig can be applied. For example, if there is a sill for a side-opening door on a floor 2 or higher of a building that is not connected to stairs or the like, the fixing unit 1 and fixing jig can be applied.

[0049] Furthermore, the fixing unit 1 includes a first fixing jig 2 and a second fixing jig 3. The first fixing jig 2 and the second fixing jig 3 are positioned on both sides of the ladder 200 and fixed to the working end 52a. As a result, the position of the fixing unit 1 can prevent the ladder 200 from shifting in the longitudinal direction of the threshold 105. Consequently, the propped-up ladder 200 can be stabilized.

[0050] Furthermore, the first fixing jig 2 is further equipped with a first buffer 16. Each component of the first clamp section 4 contacts the groove 106 of the threshold 105 via the first buffer 16. Generally, thresholds 105 are made of materials such as aluminum or stainless steel. For this reason, thresholds 105 are prone to scratches such as dents. Since thresholds 105 are firmly fixed to the floor 52, replacing thresholds 105 is a large-scale and costly job. The provision of the first buffer 16 helps to prevent the first clamp section 4 from damaging the threshold 105.

[0051] Embodiment 2. Figure 6 is a perspective view of the first fixing jig of the fixing unit in Embodiment 2. Note that parts identical or corresponding to parts in Embodiment 1 are denoted by the same reference numerals. Descriptions of these parts are omitted.

[0052] As shown in Figure 6, in Embodiment 2, the first fixing part 5 of the first fixing jig 2 is different from the first fixing part 5 in Embodiment 1. The first fixing part 5 comprises a first gripping part 30 and a first rotating part 31.

[0053] The first gripping section 30 is capable of gripping an object with its two gripping bodies 30a. For example, the first gripping section 30 can grip the vertical column 201 of a ladder 200, which is not shown in Figure 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 rotatably and pivotably attached to the first base 12 at the lower mounting part 31a. The first rotating part 31 supports the first gripping part 30. At the upper mounting part 31b, the first rotating part 31 supports the first gripping part 30 so that it can rotate and pivot relative to the first rotating part 31. By tightening the first adjustment screw 31c, the first rotating part 31 is fixed to the first base 12. By tightening the first adjustment screw 31c, the first gripping part 30 is fixed to the first rotating part 31. That is, by tightening the first adjustment screw 31c, the relative distance and orientation of the first gripping part 30 with respect to the first clamping part 4 are fixed.

[0055] Although not shown in the figures, the second fixing jig 3 may also have a second gripping portion and a second rotating portion, similar in configuration to the first fixing jig 2.

[0056] Although not shown, after the ladder 200 is placed over the working end 52a, the first clamp portion 4 of the first fixing jig 2 is fixed to the working end 52a in the same manner as in Embodiment 1. Then, while being rotated and swiveled by the first rotating portion 31, the first gripping portion 30 is positioned to grip the vertical column 201 of the ladder 200. Subsequently, the first gripping portion 30 grips the vertical column 201 when operated by a worker. Then, the first adjustment screw 31c is tightened, fixing the first gripping portion 30 to the first clamp portion 4. In this state, the ladder 200 is fixed to the first fixing jig 2.

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

[0058] According to Embodiment 2 described above, the first fixing part 5 of the first fixing jig 2 has a first rotating part 31 and a first gripping part 30. The first gripping part 30 can be fixed to the first base 12 in any position. Therefore, the first fixing part 5 can be fixed to the ladder 200 which is leaning at various angles. [Industrial applicability]

[0059] As described above, the fixed unit 1 relating to this disclosure can be used for the work of leaning a ladder against it. [Explanation of symbols]

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

Claims

1. In a building where a threshold is provided on the working end of the floor adjacent to an opening, having a groove that guides the lower end of a side-opening door, a jig for fixing a ladder placed on the working end from scaffolding below the floor to the working end, A clamp portion is positioned on the side of the ladder such that a portion of the groove faces the groove side facing away from the opening, and another portion of the working end faces the end side facing the opening, which is the groove side facing away from the groove side. A fixing portion extending from the clamp portion and fixed to the ladder which is hung from the scaffolding to the working end, Equipped with, The clamp portion is A base having a length greater than or equal to 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 protrusion, A movable body extending from the support so as to be able to move back and forth in the direction of the protruding body, The projecting body faces the groove side surface, the moving body faces the end side surface, and the working end is fixed to the working end by the projection body and the moving body sandwiching the portion of the working end between the groove side surface and the end side surface. The aforementioned fixing part is A fixing plate extending from the base in the direction opposite to the aforementioned protrusion, and having an elongated hole, A binding body consisting of a string that is passed through the elongated hole and connects and secures the fixing plate and the vertical post of the ladder to each other, A ladder fixing jig having [a specific feature].

2. In a building where a threshold is provided on the working end of the floor adjacent to an opening, having a groove that guides the lower end of a side-opening door, a jig for fixing a ladder placed on the working end from scaffolding below the floor to the working end, A clamp portion is positioned on the side of the ladder such that a portion of the groove faces the groove side facing away from the opening, and another portion of the working end faces the end side facing the opening, which is the groove side facing away from the groove side. A fixing portion extending from the clamp portion and fixed to the ladder which is hung from the scaffolding to the working end, Equipped with, The clamp portion is A base having a length greater than or equal to 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 protrusion, A movable body extending from the support so as to be able to move back and forth in the direction of the protruding body, The projecting body faces the groove side surface, the moving body faces the end side surface, and the working end is fixed to the working end by the projection body and the moving body sandwiching the portion of the working end between the groove side surface and the end side surface. The aforementioned fixing part is A fixing plate extending from the base in the direction opposite to the aforementioned protrusion, and having an elongated hole, A fastening body having a strip-like shape, which is passed through the elongated hole and connects and secures the fixing plate and the vertical posts of the ladder to each other, A ladder fixing jig having [a specific feature].

3. The ladder fixing jig according to claim 2, wherein the angle made in the longitudinal direction of the elongated hole with respect to the base is 75 degrees.

4. The aforementioned floor is the floor of the lowest floor of the building. The aforementioned door is the elevator landing door, The opening is the elevator shaft, The scaffolding is the pit of the elevator shaft, as described in any one of claims 1 to 3.

5. A first fixing jig which is a ladder fixing jig according to claim 1 or claim 2, A second fixing jig comprising: a second clamp portion positioned to the side of the ladder such that a portion of it faces the groove side and another portion faces the end side, and fixed to the working end by clamping the portion of the working end between the groove side and the end side; and a second fixing portion extending from the second clamp portion and fixed to the ladder that is hung from the scaffolding to the working end; Equipped with, The first fixing jig is positioned on one side of the ladder in the longitudinal direction of the working end, The second fixing jig is a ladder fixing unit positioned on the side opposite to the one side of the ladder in the longitudinal direction of the working end.

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