Lifting arm for elevator construction and method for transporting elevator equipment using the same into the elevator shaft.

Abstract

The objective is to provide a lifting arm and a method for transporting elevator equipment into the elevator shaft in a simple and safe manner for elevator construction. [Solution] By using a suspension arm 5 comprising a base 50 attached to a predetermined location in the elevator, a first arm 53 rotatably connected to the base 50 at its base end so as to be vertically axial, and a second arm 54 rotatably connected to the tip of the first arm 53 at its base end so as to be vertically axial, and having a suspension portion 54c at its tip, elevator equipment can be easily and safely transported into the hoistway.

Description

Technical Field

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[0001] The present invention relates to a suspension arm for suspending and horizontally moving elevator equipment in elevator construction and a method for carrying elevator equipment into a hoistway using the same.

Background Art

[0002] In recent years, in so-called machine roomless type elevators where the hoist is arranged in the hoistway, the hoist may be installed at the top of the hoistway (for example, Patent Documents 1 and 2). In this case, in the installation work of the elevator, the hoist transported from the factory to the site is placed on the floor near the landing entrance on the first floor, and after being carried into the hoistway using two hoisting machines hung at two locations, one near the landing entrance in the hoistway and the other on the back side in the hoistway, it is lifted to the top of the hoistway using a hoisting machine hung at the top of the hoistway.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, this carrying method is a complicated operation, and in some cases, it becomes a dangerous operation in which the operator carries in the hoist while restraining the hoist that swings during horizontal movement. This is the same not only for the hoist but also for other elevator equipment.

[0005] Therefore, in view of such circumstances, the present invention has been made, and an object thereof is to provide a suspension arm for elevator construction and a carrying method that can carry elevator equipment into the hoistway simply and safely. [Means for solving the problem]

[0006] The suspension arm for elevator construction according to the present invention is A lifting arm for elevator construction is installed at the height of the landing entrance of a predetermined floor within an elevator shaft, in which the first guide rail of the car is installed in a first space extending vertically between the first side of the car and the wall of the elevator shaft, and the second guide rail of the car is installed in a second space extending vertically between the second side of the car and the wall of the elevator shaft, and is used to transport elevator equipment from the landing into the elevator shaft. A base attached to either the first guide rail or the second guide rail, A first arm is rotatably connected to the base at its base end, and its length from the center of rotation to the tip is shorter than the distance between the first and second guide rails. It comprises a second arm that is rotatably connected to the tip of the first arm at its base end, having a suspension portion at its tip, and capable of pivoting so as not to come into contact with either the first guide rail or the second guide rail. This is a lifting arm used for elevator construction.

[0007] Furthermore, the suspension arm for elevator construction according to the present invention is A lifting arm for elevator construction is installed in a hoistway where the first guide rail of the car is installed in a first space extending vertically between the first side of the car and the wall of the hoistway, and the second guide rail of the car, the third guide rail and the fourth guide rail of the counterweight are installed in parallel in the direction along the wall in a second space extending vertically between the second side of the car and the wall of the hoistway, and is installed at the height of the landing entrance of a predetermined floor, and is used to transport elevator equipment from the landing into the hoistway and move it between the third guide rail and the fourth guide rail, A base attached to either the first guide rail or the second guide rail, A first arm is rotatably connected to the base at its base end, and its length from the center of rotation to the tip is shorter than the distance between the first and second guide rails. It comprises a second arm that is rotatably connected to the tip of the first arm at its base end, having a suspension portion at its tip, and capable of pivoting so as not to come into contact with either the first guide rail or the second guide rail. This is a lifting arm used for elevator construction.

[0008] Furthermore, the suspension arm for elevator construction according to the present invention is A base that is attached to a designated location on the elevator, A first arm is coupled to the base at its base end so as to be rotatable around a vertical axis, It comprises a second arm which is rotatably connected to the tip of the first arm at its base end, and which has a suspension portion at its tip, The base is, A first member that abuts against the base of the guide rail from the bottom side and is detachably attached to the base of the guide rail using a fastener, The system includes a first arm which is connected to a second member which is detachably attached to the first member and, when attached, forms a cylindrical shape that surrounds the guide rail together with the first member. This is a lifting arm used for elevator construction.

[0009] One embodiment of the suspension arm for elevator construction according to the present invention is: The second arm has a length from the center of rotation to its tip that is shorter than the length from the center of rotation to its tip of the first arm. This configuration can be adopted.

[0010] One embodiment of the suspension arm for elevator construction according to the present invention is: The second arm can rotate to within a circle with a radius 1.5 times the length from the center of rotation of the first arm to its tip. This configuration can be adopted.

[0011] As one aspect of the suspension arm for elevator construction according to the present invention, The first arm is coupled to the base using a pin, and the second arm is coupled to the first arm using a pin. By removing the pin, it is separable. A configuration as described above can be adopted.

[0012] As one aspect of the suspension arm for elevator construction according to the present invention, The base is detachably attached to the base of the guide rail using a fixture. A configuration as described above can be adopted.

[0014] The method for carrying elevator equipment into the hoistway according to the present invention is A method for carrying elevator equipment into the hoistway using a suspension arm for elevator construction attached to either the first guide rail or the second guide rail, wherein the elevator equipment is carried from the landing into the hoistway, With the second arm rotated so as not to contact either the first guide rail or the second guide rail, the first arm is rotated to pass between the first guide rail and the second guide rail, and the equipment is moved deeper into the hoistway than between the first guide rail and the second guide rail. This is a method for carrying elevator equipment into the hoistway.

[0015] The method for carrying elevator equipment into the hoistway according to the present invention is A method for carrying elevator equipment into the hoistway using a suspension arm for elevator construction attached to either the first guide rail or the second guide rail, wherein the elevator equipment is carried from the landing into the hoistway, With the second arm rotated so as not to contact either the first guide rail or the second guide rail, the first arm is rotated to pass between the first guide rail and the second guide rail, and the equipment is moved between the third guide rail and the fourth guide rail deeper into the hoistway than between the first guide rail and the second guide rail. This is a method for carrying elevator equipment into the hoistway.

Advantages of the Invention

[0016] According to the present invention, by using a suspension arm that is compatible with the structure inside the hoistway, elevator equipment can be easily and safely transported into the hoistway. [Brief explanation of the drawing]

[0017] [Figure 1] Figure 1 is a partial cross-sectional plan view of the elevator at the top of the hoistway. [Figure 2] Figure 2 is a front view of the area surrounding the elevator hoisting machine at the top of the hoistway. [Figure 3] Figure 3 is an explanatory diagram of the installation method for the hoisting machine. [Figure 4] Figure 4(a) is a perspective view of the suspension arm in its extended state. Figure 4(b) is a perspective view of the suspension arm in its bent state. [Figure 5] Figure 5(a) is a side view of the suspension arm in its extended state. Figure 5(b) is a top view of the suspension arm in its extended state. [Figure 6] Figure 6(a) is a side view of the first member of the base of the suspension arm. Figure 6(b) is a side view of the second member of the base. [Figure 7] Figure 7(a) is a plan view of the first member. Figure 7(b) is a plan view of the second member. Figure 7(c) is a plan view of the first and second members combined. [Figure 8] Figure 8(a) is a side view of the first arm of the suspension arm. Figure 8(b) is a top view of the first arm. [Figure 9] Figure 9(a) is a side view of the second arm of the suspension arm. Figure 9(b) is a top view of the second arm. [Figure 10] Figures 10(a) to (d) are explanatory diagrams of the first method of transporting a hoisting machine from the landing into the elevator shaft using a lifting arm. [Figure 11] Figures 11(a) to (d) are explanatory diagrams of the second method of transporting the hoisting machine from the landing into the elevator shaft using a lifting arm. [Figure 12]Figures 12(a) to (d) are explanatory diagrams of the third method of transport, in which a hoisting machine is brought from the landing into the elevator shaft using a lifting arm. [Figure 13] Figure 13 is an explanatory diagram of the rotation (swivel) range of the first arm and the second arm. [Modes for carrying out the invention]

[0018] The following will explain the suspension arms used for elevator construction, but first, let's explain the overall structure of the elevator.

[0019] As shown in Figure 1, the elevator 1 comprises a hoistway 2, a car 3, and a drive unit 4 for the car 3. The hoistway 2 extends vertically within a building with multiple floors. The car 3 moves up and down within the hoistway 2 by the drive unit 4, and stops at a designated floor when the drive unit 4 is stopped.

[0020] The elevator car 3 is equipped with guide bodies (not shown) such as guide shoes and roller guides at four locations: top, bottom, left, and right. Two rows of guide rails 21 and 22 extending vertically are installed on both sides of the elevator car 3 within the hoistway 2, allowing the elevator car 3 to move up and down within the hoistway 2 while being guided by the two rows of guide rails 21 and 22 with its four guide bodies.

[0021] The guide rail (first guide rail) 21 for one row of car 3 is installed in the vertically extending space (first space) between one side of car 3 (first side, either the left or right side when the side with the car door is considered the front (in this example, the right side)) and the wall of the hoistway 2. The guide rail (second guide rail) 22 for the other row of car 3 is installed in the vertically extending space (second space) between the other side of car 3 (second side) and the wall of the hoistway 2.

[0022] The drive unit 4 comprises a hoisting machine 40, a counterweight 41, a main rope (not shown), and various sheaves (not shown). The hoisting machine 40 is installed at the top of the elevator shaft 2. The counterweight 41 is located in a second space and moves up and down within the elevator shaft 2. Two rows of guide rails 23 and 24 extending vertically are installed on both sides of the counterweight 41 in the second space, allowing the counterweight 41 to move up and down within the elevator shaft 2 while being guided by the two rows of guide rails 23 and 24. The main rope is wound around the drive sheave of the hoisting machine 40 and various sheaves. When the hoisting machine 40 is driven, the main rope moves, and consequently, the elevator car 3 moves up and down within the elevator shaft 2. Similarly, the counterweight 41 moves up and down within the elevator shaft 2 in accordance with the movement of the main rope.

[0023] As shown in Figure 2, the second guide rail 22, the guide rail (third guide rail) 23 of one row of counterweights 41, and the guide rail (fourth guide rail) 24 of the other row of counterweights 41 are installed in the following manner: i) in the second space, they are installed in parallel in the direction along the wall surface of the elevator shaft 2; ii) the distance between the second guide rail 22 and the third guide rail 23 is narrower than the distance between the third guide rail 23 and the fourth guide rail 24 (in other words, the third guide rail 23 is positioned closer to the second guide rail 22); and iii) at the top of the elevator shaft 2, the height of the upper end of the third guide rail 23 is lower than the height of the upper ends of the second guide rail 22 and the fourth guide rail 24.

[0024] The support frame 25 of the hoisting machine 40 is installed so as to pass over the upper end of the third guide rail 23 and straddle the second guide rail 22 and the fourth guide rail 24. The support frame 25 is installed at a predetermined distance below the ceiling surface at the top of the elevator shaft 2. The support frame 25 is a long body having a length that spans the second guide rail 22 and the fourth guide rail 24, and is also called a machine beam. The support frame 25 is a metal beam such as iron or steel.

[0025] The hoisting machine 40 is installed on the frame 25. In the second space, the hoisting machine 40 is installed so that the drive shaft is aligned in a direction perpendicular to the wall surface of the elevator shaft 2. The hoisting machine 40 has a thin shape in which the width is in the left-right direction perpendicular to the drive shaft direction and the thickness is in the direction of the drive shaft direction, with the thickness being smaller than the width. The hoisting machine 40 has a width narrower than the distance between the third guide rail 23 and the fourth guide rail 24.

[0026] Here, in the installation work of the hoisting machine 40 in the installation work of elevator 1 (abbreviated as "elevator work"), as a preparatory step, as shown in Figure 3, i) the lifting arm 5 is installed within the hoistway 2 within the height range of the landing entrance 26a of the landing 26 of a predetermined floor (in this example, the lowest floor, but it may be the 1st floor, an intermediate floor of the 2nd floor or higher, or the top floor), ii) the lifting machine 6 (for example, a manual chain block) is attached to the tip of the lifting arm 5, and iii) the lifting machine 7 (for example, an electric chain block) is installed at the top of the hoistway 2.

[0027] The hoisting machine 40, which is placed on the floor near the landing entrance 26a, is then iv) attached to the lifting machine 6 after the preparation process, v) carried into the elevator shaft 2 through the landing entrance 26a using the lifting arm 5, moved between the third guide rail 23 and the fourth guide rail 24, vi) attached to the lifting machine 7, and vii) lifted to the top of the elevator shaft 2 through the vertically extending space (third space) between the third guide rail 23 and the fourth guide rail 24 using the lifting machine 7.

[0028] As shown in Figures 4 and 5, the suspension arm 5 comprises a base 50, a first arm 53, and a second arm 54. The base 50 is attached to the second guide rail 22. The base 50 comprises a first member 51 and a second member 52. The first arm 53 is rotatably coupled to the base 50 at its base end, around a vertical axis. The second arm 54 is rotatably coupled to the tip of the first arm 53 at its base end, around a vertical axis. The first arm 53 is pin-coupled to the base 50 using a pin 55, and can be separated from the base 50 by removing the pin 55. The second arm 54 is pin-coupled to the first arm 53 using a pin 55, and can be separated from the first arm 53 by removing the pin 55.

[0029] As shown in Figures 6 and 7, the first member 51 comprises a rear plate portion 51a and left and right side plate portions 51b, 51b. The rear plate portion 51a is a vertically elongated plate-like portion. The side plate portions 51b are vertically elongated plate-like portions that protrude forward (towards the second member 52) from the side edge of the rear plate portion 51a. As an example, the first member 51 is constructed by bending both sides of a metal plate material such as iron or steel, and the rear plate portion 51a and the side plate portions 51b have a rectangular shape.

[0030] The rear plate portion 51a abuts against the base portion 22a of the second guide rail 22 from the bottom side and is detachably attached to the base portion 22a using a fastener 51c. By tightening the fasteners (bolts and nuts) of the fastener 51c, the rear plate portion 51a is clamped at four points on the top, bottom, left, and right of the base portion 22a by the pressing portion that abuts against the outer surface of the base portion 22a, and is detachably attached to the base portion 22a. The second guide rail 22 has a T-shape in plan view and comprises a base portion 22a and a projection portion 22b. The base portion 22a is a strip-shaped plate extending in the vertical direction. The projection portion 22b is a strip-shaped plate extending in the vertical direction, connected to the central part of the base portion 22a at one side, and protruding perpendicularly from the base portion 22a. The other guide rails 21, 23, and 24 have a similar structure.

[0031] The side plate portion 51b has a first slit 51d and a second slit 51e. The first slit 51d opens at the leading edge (vertical edge) of the side plate portion 51b, extends rearward, and then extends downward (having an inverted L-shape) and is formed in the side plate portion 51b. The second slit 51e opens at the upper edge of the side plate portion 51b and is formed in the side plate portion 51b, extending downward.

[0032] The second member 52 comprises a front plate portion 52a and left and right side plate portions 52b, 52b. The front plate portion 52a is a vertically elongated plate-like portion. The side plate portions 52b are vertically elongated plate-like portions that protrude rearward (towards the first member 51) from the side edge of the front plate portion 52a. As an example, the second member 52 is constructed by bending both sides of a metal plate material such as iron or steel, and the front plate portion 52a and the side plate portions 52b have a rectangular shape.

[0033] The front plate portion 52a faces the rear plate portion 51a in parallel with a predetermined distance between them. The side plate portion 52b overlaps with the side plate portion 51b. As a result, when the second member 52 is attached to the first member 51 (when the first member 51 and the second member 52 are integrated), the base 50 becomes cylindrical (rectangular) and surrounds the second guide rail 22.

[0034] The side plate portion 52b has engaging portions 52c. The engaging portions 52c are provided so as to protrude from the side plate portion 52b, and two are provided corresponding to the first slit 51d and the second slit 51e of the first member 51, respectively. One engaging portion 52c (an engaging portion 52c provided at the lower part of the side plate portion 52b) engages with the first slit 51d and is locked to the closed end at the lower end of the first slit 51d. The other engaging portion 52c (an engaging portion 52c provided at the upper part of the side plate portion 52b) engages with the second slit 51e and is locked to the closed end at the lower end of the second slit 51e. The two engaging portions 52c, 52c, the first slit 51d, and the second slit 51e are arranged in such a positional relationship that when one engaging portion 52c is engaged with the closed end of the first slit 51d, the other engaging portion 52c is engaged with the closed end of the second slit 51e. The second member 52 is detachably attached to the first member 51 by moving each engaging portion 52c so that it slides within the first slit 51d and the second slit 51e. As an example, the engaging portion 52c is the shaft portion of a fastener (bolt and nut) that is inserted through a through hole formed in the side plate portion 52b. By tightening the fastener, the first member 51 and the second member 52 are fixed together.

[0035] The front plate portion 52a includes a pair of bracket portions 52d, 52d and a pair of bracket portions 52f, 52f as connection points with the first arm 53. The pair of bracket portions 52d, 52d are plate-shaped portions that protrude forward (towards the first arm 53) from the upper outer surface of the front plate portion 52a. The pair of bracket portions 52f, 52f are plate-shaped portions that protrude forward (towards the first arm 53) from the lower outer surface of the front plate portion 52a. The distance between the pair of bracket portions 52d, 52d and the distance between the pair of bracket portions 52f, 52f are the same.

[0036] Each of the pair of bracket portions 52d, 52d has a through hole 52e for the pin 55. Each of the pair of bracket portions 52f, 52f also has a through hole 52g for the pin 55. The two through holes 52e, 52e and the two through holes 52g, 52g are formed coaxially with respect to a single vertical axis.

[0037] As shown in Figure 8, the first arm 53 comprises a main arm portion 53a and a reinforcing arm portion 53b. The main arm portion 53a is the part that extends straight horizontally. The reinforcing arm portion 53b is located below the main arm portion 53a and extends diagonally, with its tip connected to the main arm portion 53a. The first arm 53 is constructed using metal members such as iron or steel, and the main arm portion 53a is mainly composed of a rectangular metal tube made of iron or steel.

[0038] The base end of the main arm portion 53a has a through hole 53c for the pin 55. The base end of the reinforcing arm portion 53b also has a through hole 53d for the pin 55. The through holes 53c and 53d are formed coaxially with respect to a single vertical axis.

[0039] The base end of the main arm portion 53a is inserted between a pair of bracket portions 52d, 52d, and a pin 55 is inserted through it with the two through holes 52e, 52e and the through hole 53c aligned. The base end of the reinforcing arm portion 53b is inserted between a pair of bracket portions 52f, 52f, and a pin 55 is inserted through it with the two through holes 52g, 52g and the through hole 53d aligned. As a result, the first arm 53 is rotatably connected to the base 50 at its base end, around a vertical axis. On the other hand, the first arm 53 can be separated from the base 50 by removing the pin 55.

[0040] The tip of the main arm portion 53a is the part that extends forward (towards the second arm 54) from the reinforcing arm portion 53b. The tip of the main arm portion 53a has a through hole 53e for the pin 55.

[0041] As shown in Figure 9, the second arm 54 has a shape that extends straight horizontally and is positioned to coincide with the extension line of the main arm portion 53a of the first arm 53. The second arm 54 is constructed using metal members such as iron or steel, and its main component is a rectangular tubular material made of iron or steel.

[0042] The base end of the second arm 54 is provided with a pair of bracket portions 54a, 54a as a connection point with the first arm 53. The pair of bracket portions 54a, 54a are plate-shaped portions that protrude rearward (towards the first arm 53). The spacing between the pair of bracket portions 54a, 54a is the same as the spacing between the pair of bracket portions 52d, 52d and the pair of bracket portions 52f, 52f. Each of the pair of bracket portions 54a, 54a has a through hole 54b for a pin 55.

[0043] The tip of the first arm 53 is inserted between a pair of bracket portions 54a, 54a, and the pin 55 is inserted with the two through holes 54b, 54b and the through hole 53e aligned, thereby connecting the second arm 54 to the first arm 53 at its base so as to be rotatable around a vertical axis. On the other hand, the second arm 54 can be separated from the first arm 53 by removing the pin 55.

[0044] The tip of the second arm 54 has a lifting section 54c. For example, the lifting section 54c is an eyebolt attached to the underside of the tip of the second arm 54. As described above, a lifting machine 6 is attached to the lifting section 54c. Alternatively, the equipment may be lifted by attaching a lifting device such as a wire rope attached to the lifting section 54c without using a lifting machine.

[0045] The configuration of the suspension arm 5 is as described above. Next, we will explain how to use this suspension arm 5 to transport the hoisting machine 40 from the landing into the hoistway 2 as part of the elevator equipment.

[0046] The first method of transporting the equipment is as shown in Figure 10. First, the tip of the lifting arm 5 (the tip of the second arm 54) is extended from the landing entrance to the landing, and the hoisting machine 40, which is placed on the floor near the landing entrance, is lifted (Figure 10(a)). Next, the second arm 54 is rotated to the maximum or near-maximum angle in the rotational direction of the first arm 53 (Figure 10(b)). In this state, the first arm 53 is rotated to pass between the first guide rail 21 and the second guide rail 22 (Figure 10(c)). Then, the first arm 53 and the second arm 54 are moved as appropriate to move the hoisting machine 40 to the area between the third guide rail 23 and the fourth guide rail 24, which is located further inside the elevator shaft 2 than between the first guide rail 21 and the second guide rail 22 (Figure 10(d)). This completes the transport of the hoisting machine 40. Next, as described above, the lifting machine 7 is attached and the object is lifted to the top of the elevator shaft 2.

[0047] The second method of delivery is as shown in Figure 11. First, the tip of the lifting arm 5 is extended from the landing entrance to the landing, and the hoisting machine 40 is lifted (Figure 11(a)). Next, the second arm 54 is rotated to the maximum or near-maximum angle in the opposite direction to the rotation direction of the first arm 53, while the first arm 53 is rotated to pass between the first guide rail 21 and the second guide rail 22 (Figure 11(b)). After that, the second arm 54 is rotated in the direction of rotation of the first arm 53 (Figure 11(c)). Then, the first arm 53 and the second arm 54 are moved as appropriate to move the hoisting machine 40 between the third guide rail 23 and the fourth guide rail 24 (Figure 11(d)). This completes the delivery of the hoisting machine 40.

[0048] The third method of delivery is as shown in Figure 12. Unlike the first and second methods of delivery, the third method involves attaching the lifting arm 5 to the first guide rail 21. First, the tip of the lifting arm 5 is extended from the landing entrance to the landing, and the hoisting machine 40 is suspended (Figure 12(a)). Next, the second arm 54 is rotated to the maximum or near-maximum angle in the rotational direction of the first arm 53 (Figure 12(b)). In this state, the first arm 53 is rotated to pass between the first guide rail 21 and the second guide rail 22 (Figure 12(c)). Then, the first arm 53 and the second arm 54 are moved as appropriate to move the hoisting machine 40 between the third guide rail 23 and the fourth guide rail 24 (Figure 12(d)). This completes the delivery of the hoisting machine 40.

[0049] Regardless of the loading method, the first arm 53 or the second arm 54 must not come into contact with the first guide rail 21 or the second guide rail 22 during rotation. Therefore, as shown in Figure 13, it is preferable that the first arm 53 has a length L1 from the center of rotation to its tip that is shorter than the distance between the first guide rail 21 and the second guide rail 22, and that the second arm 54 satisfies at least one of the following conditions i) and ii). i) The second arm 54 has a length L2 from the center of rotation to its tip that is shorter than the length L1 from the center of rotation to its tip of the first arm 53. ii) The second arm 54 is capable of swiveling to the inside of a circle with a radius R that is 1.5 times, more preferably 0.9 times, the length L1 from the rotation center of the first arm 53 to its tip.

[0050] As described above, the suspension arm 5 according to this embodiment has two joints (two axes), namely the first arm 53 and the second arm 54, which makes it suitable for the structure and layout within the elevator shaft 2. Therefore, the suspension arm 5 according to this embodiment allows the hoisting machine 40 to be easily and safely transported into the elevator shaft 2.

[0051] Furthermore, according to the suspension arm 5 of this embodiment, by having two joints (two axes) consisting of a first arm 53 and a second arm 54, the range of motion of the tip of the second arm 54 is widened. Therefore, according to the suspension arm 5 of this embodiment, even in recessed or intricate locations such as between the third guide rail 23 and the fourth guide rail 24, the hoisting machine 40 can be accurately moved to the desired location within the elevator shaft 2.

[0052] According to the suspension arm 5 of this embodiment, the first arm 53 has a length L1 from the center of rotation to its tip that is shorter than the distance between the first guide rail 21 and the second guide rail 22, and the second arm 54 is rotatable so as not to come into contact with the first guide rail 21 or the second guide rail 22. Therefore, the suspension arm 5 of this embodiment can be suitably adapted to the structure or layout within the elevator shaft 2.

[0053] According to the suspension arm 5 of this embodiment, the base 50, the first arm 53, and the second arm 54 can be separated by removing the pin 55. Therefore, the suspension arm 5 of this embodiment can be stored without taking up much space when not in use, and individual parts can be replaced if any part becomes deformed or damaged.

[0054] In the suspension arm 5 according to this embodiment, the spacing between the pair of bracket portions 52d, 52d of the base 50 that receives the base end of the main arm portion 53a of the first arm 53, the spacing between the pair of bracket portions 52f, 52f of the base 50 that receives the base end of the reinforcing arm portion 53b of the first arm 53, and the spacing between the pair of bracket portions 54a, 54a of the second arm 54 that receives the tip of the first arm 53 are the same. Therefore, in the suspension arm 5 according to this embodiment, the base 50, the first arm 53 and the second arm 54 can be connected with a single type of pin 55.

[0055] According to the suspension arm 5 of this embodiment, it can be detachably attached to the base of the guide rail using a fixing device 51c. Therefore, according to the suspension arm 5 of this embodiment, it can be installed at any height position within the elevator shaft 2. Moreover, according to the suspension arm 5 of this embodiment, it can be attached to any of the guide rails, the first guide rail 21, the second guide rail 22, the third guide rail 23, or the fourth guide rail 24. Therefore, according to the suspension arm 5 of this embodiment, the range of movement of the tip of the second arm 54 can be selected from a plurality of patterns.

[0056] According to the suspension arm 5 of this embodiment, the base 50 is separable into a first member 51 and a second member 52. This allows for an installation method in which the lightweight first member 51 is attached to the base of the guide rail first, and then the second member 52, first arm 53, and second arm 54 are attached individually afterward, or a combined unit of these is attached to the first member 51. Therefore, according to the suspension arm 5 of this embodiment, attachment to the guide rail can be done easily and without effort.

[0057] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0058] In the above embodiment, the hoisting machine 40 is the equipment of the elevator 1. However, the present invention is not limited to this. The equipment may be other elevator equipment, such as a control panel, governor, or components of the elevator car.

[0059] In the above embodiment, the hoisting machine 40 is installed at the top of the elevator shaft 2, so the hoisting machine 40 is brought into the elevator shaft 2 and then lifted up to the top of the elevator shaft 2. However, the present invention is not limited to this. The present invention is used to bring equipment into an elevator shaft regardless of the height at which it is installed.

[0060] In the above embodiment, the suspension arm 5 is attached to one of the guide rails. However, the present invention is not limited thereto. The suspension arm may be attached to other structures. In this case, the other structures are not limited to structures within the hoistway, but may also be structures outside the hoistway or structures at the landing entrances.

[0061] In the first place, the lifting arm of the present invention is not limited to the use of transporting equipment into an elevator shaft, but can be used for any application made possible by its structure. For example, as one application of lifting and moving equipment horizontally, it can be used to transport equipment from inside the elevator shaft to the landing through the landing entrance. It can also be used as the suspension point for lifting equipment that lifts or lowers equipment inside the elevator shaft.

[0062] In the above embodiment, the bracket portions 52d and 52f for connecting the base 50 and the first arm 53 are provided on the base 50. However, the present invention is not limited thereto. The bracket may also be provided on the base end of the first arm.

[0063] In the above embodiment, the bracket portion 54a for connecting the first arm 53 and the second arm 54 is provided at the base end of the second arm 54. However, the present invention is not limited thereto. The bracket may also be provided at the tip of the first arm.

[0064] In the above embodiment, the slits 51d and 51e for joining the first member 51 and the second member 52 of the base 50 are provided in the first member 51, and the engaging portion 52c is provided in the second member 52. However, the present invention is not limited thereto. The slits may be provided in the second member, and the engaging portion may be provided in the first member. In this case, the slits are formed so that their vertical orientation is reversed (i.e., they extend upward).

[0065] In the above embodiment, the second arm 54 is a single arm. However, the present invention is not limited thereto. The second arm may consist of a combination of two or three arms connected in a manner similar to the combination of the first and second arms. In this case, the number of joints increases, enabling a more varied method of movement.

[0066] In this invention, terms that specify shapes, parts, states, or directions, such as "rectangular," "straight," "center," "center," "end," "side," "coincident," "same," "identical," "parallel," "vertical," "perpendicular," "orthogonal," "up and down," and "left and right," include not only the terms themselves but also the concept of "abbreviation" meaning something similar or alike. [Explanation of symbols]

[0067] 1...Elevator, 2...Hoistway, 21...Guide rail (first guide rail), 22...Guide rail (second guide rail), 22a...Base, 22b...Protruding part, 23...Guide rail (third guide rail), 24...Guide rail (fourth guide rail), 25...Frame, 26...Landing, 26a...Landing entrance / exit, 3...Car, 4...Drive unit, 40...Hoisting machine, 41...Counterweight, 5...Suspension arm, 50...Base, 51...First member, 51a...Rear plate section, 51b...Side plate section, 51c...Fixing device, 51d...First slit, 51e...Second slit 52...Second member, 52a...Front plate, 52b...Side plate, 52c...Engaging part (fastener), 52d...Bracket, 52e...Through hole, 52f...Bracket, 52g...Through hole, 53...First arm, 53a...Main arm, 53b...Reinforcement arm, 53c, 53d, 53e...Through hole, 54...Second arm, 54a...Bracket, 54b...Through hole, 54c...Lifting part, 55...Pin, 6,7...Lifting machine, L1...Length from the rotation center of the first arm 53 to the tip, L2...Length from the rotation center of the second arm 54 to the tip, R...Radius which is a predetermined multiple of the length L1

Claims

1. A lifting arm for elevator construction is installed at the height of the landing entrance of a predetermined floor within an elevator shaft, in which the first guide rail of the car is installed in a first space extending vertically between the first side of the car and the wall of the elevator shaft, and the second guide rail of the car is installed in a second space extending vertically between the second side of the car and the wall of the elevator shaft, and is used to transport elevator equipment from the landing into the elevator shaft. A base attached to either the first guide rail or the second guide rail, A first arm is rotatably connected to the base at its base end, and its length from the center of rotation to the tip is shorter than the distance between the first guide rail and the second guide rail. The system includes a second arm that is rotatably connected to the tip of the first arm at its base end, has a suspension portion at its tip, and is pivotable so as not to come into contact with either the first guide rail or the second guide rail. Lifting arm for elevator construction.

2. A lifting arm for elevator construction is installed in a hoistway where the first guide rail of the car is installed in a first space extending vertically between the first side of the car and the wall of the hoistway, and the second guide rail of the car, the third guide rail and the fourth guide rail of the counterweight are installed in parallel in the direction along the wall in a second space extending vertically between the second side of the car and the wall of the hoistway, and is installed at the height of the landing entrance of a predetermined floor, and is used to transport elevator equipment from the landing into the hoistway and move it between the third guide rail and the fourth guide rail, A base attached to either the first guide rail or the second guide rail, A first arm is rotatably connected to the base at its base end, and its length from the center of rotation to the tip is shorter than the distance between the first guide rail and the second guide rail. The system includes a second arm that is rotatably connected to the tip of the first arm at its base end, has a suspension portion at its tip, and is pivotable so as not to come into contact with either the first guide rail or the second guide rail. Lifting arm for elevator construction.

3. A base that is attached to a predetermined location on the elevator, A first arm is coupled to the base at its base end so as to be rotatable around a vertical axis, It comprises a second arm which is rotatably connected to the tip of the first arm at its base end, and which has a suspension portion at its tip, The base is, A first member that abuts against the base of the guide rail from the bottom side and is detachably attached to the base of the guide rail using a fastener, The system includes a first arm which is connected to a second member which is detachably attached to the first member and, when attached, forms a cylindrical shape that surrounds the guide rail together with the first member. Lifting arm for elevator construction.

4. The second arm has a length from the center of rotation to its tip that is shorter than the length from the center of rotation to its tip of the first arm. A suspension arm for elevator construction according to claim 1 or claim 2.

5. The second arm can rotate to within a circle with a radius 1.5 times the length from the center of rotation of the first arm to its tip. A suspension arm for elevator construction according to claim 1 or claim 2.

6. The first arm is connected to the base using a pin, and the second arm is connected to the first arm using a pin. The two arms can be separated by removing the pin. A suspension arm for elevator construction according to any one of claims 1 to 3.

7. The base is detachably attached to the base of the guide rail using fasteners. A suspension arm for elevator construction according to claim 1 or claim 2.

8. A method for transporting elevator equipment into a hoistway, comprising using a lifting arm for elevator construction attached to either a first guide rail or a second guide rail as described in claim 1, wherein the elevator equipment is transported from the landing into the hoistway, With the second arm rotated so as not to contact either the first or second guide rail, the first arm is rotated to pass between the first and second guide rails, and the equipment is moved to the back of the elevator shaft beyond the space between the first and second guide rails. Method for transporting elevator equipment into the hoistway.

9. A method for transporting elevator equipment into a hoistway, comprising using a lifting arm for elevator construction attached to either the first guide rail or the second guide rail as described in claim 2, wherein the elevator equipment is transported from the landing into the hoistway, With the second arm rotated so as not to contact either the first or second guide rail, the first arm is rotated to pass between the first and second guide rails, and the equipment is moved to the area between the third and fourth guide rails, which is further inside the elevator shaft than the area between the first and second guide rails. Method for transporting elevator equipment into the hoistway.

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