阅读说明：本技术 扬程延长式施工用电梯 (Lift extension type elevator for construction ) 是由 浅井贵行 古平大登 井村光芳 荻原诚 安藤英司 仓冈尚生 近藤力雄 古泽央至 于 2018-08-28 设计创作，主要内容包括：提供一种能够消除绳索扭绞的扬程延长式施工用电梯。本发明的扬程延长式施工用电梯具备：机房单元(3),其能够在井道内升降,并搭载了曳引机(15)；第1升降体(1),其能够在井道内升降,第1升降体(1)的载荷能够被机房单元(3)支承；以及第2升降体(2),其能够在井道内升降,第2升降体(2)的载荷能够在井道的下部被支承,从搭载于机房单元(3)的绳索卷筒(6)送出的绳索(5)在卷挂于第1升降体(1)的悬吊轮之后卷挂于曳引机(15)的绳轮(4),在卷挂于曳引机(15)的绳轮(4)之后卷挂于第2升降体(2)的悬吊轮,在卷挂于第2升降体(2)的悬吊轮之后与机房单元(3)连接。(Provided is an elevator for construction with an extended lift, which can eliminate twisting of a rope. The lift extension type construction elevator of the invention comprises: a machine room unit (3) which can be raised and lowered in the hoistway and on which a hoisting machine (15) is mounted; a 1 st lifting body (1) which can be lifted and lowered in the hoistway, and the load of the 1 st lifting body (1) can be supported by the machine room unit (3); and a 2 nd lifting body (2) which can be lifted in the hoistway, wherein the load of the 2 nd lifting body (2) can be supported at the lower part of the hoistway, a rope (5) sent out from a rope reel (6) mounted on the machine room unit (3) is wound around a rope pulley (4) of the hoisting machine (15) after being wound around a suspension pulley of the 1 st lifting body (1), is wound around a suspension pulley of the 2 nd lifting body (2) after being wound around a rope pulley (4) of the hoisting machine (15), and is connected to the machine room unit (3) after being wound around a suspension pulley of the 2 nd lifting body (2).)

1. An elevator for construction with an extended lift, comprising:

a machine room unit which can be lifted and lowered in a hoistway and on which a hoisting machine is mounted;

a 1 st lifting body which can be lifted and lowered in the hoistway, and a load of the 1 st lifting body can be supported by the machine room unit; and

a 2 nd vertically movable body which is vertically movable in the hoistway, and in which a load of the 2 nd vertically movable body is supported at a lower portion of the hoistway,

the rope fed from the rope reel installed in the machine room unit is wound around the rope pulley of the hoisting machine after being wound around the suspension sheave of the 1 st hoist body, is wound around the suspension sheave of the 2 nd hoist body after being wound around the rope pulley of the hoisting machine, and is connected to the machine room unit after being wound around the suspension sheave of the 2 nd hoist body.

2. The lift-extended construction elevator according to claim 1,

the rope fed from the rope reel mounted in the machine room unit passes through at least one direction switching device in a section before being wound around the suspending sheave of the 1 st vertically movable body.

3. The lift-extended construction elevator according to claim 2,

at least one of the direction conversion devices has a structure fixed to a framework of the machine room unit.

4. The lift-extended construction elevator according to claim 2,

at least one of the direction conversion devices is movable in the height direction in the hoistway, and is fixable to at least one of the machine room unit and a structure in the hoistway.

5. The lift-extended construction elevator according to claim 4,

the direction switching device that is movable in the height direction in the hoistway has a structure that is guided by at least one of the guide rail for the 2 nd vertically movable body and the guide rail for the 1 st vertically movable body.

6. The lift-extended construction elevator according to claim 4,

the rope wound around the direction conversion device that is movable in the height direction in the hoistway passes through at least one other direction conversion device in a section from the direction conversion device to the suspending sheave of the 1 st vertically movable body.

7. The lift-extended construction elevator according to claim 4,

a direction switching device that is movable in the height direction in the hoistway is disposed horizontally closer to the center of the 2 nd vertically movable body than to the center of the 1 st vertically movable body,

the rope wound around the direction conversion device passes through at least two other direction conversion devices in a section from the direction conversion device to the suspending wheel of the 1 st vertically movable body.

8. The lift-extended construction elevator according to claim 4,

the rope wound around the direction conversion device that is freely movable in the height direction in the hoistway passes through at least one other direction conversion device in a section from the direction conversion device to the rope reel.

9. The lift-extended-type construction elevator according to any one of claims 1 to 8,

the 1 st lifting body is a car moving along a car guide rail,

the 2 nd vertically movable body is a counterweight that moves along a counterweight guide rail.

10. The lift-extended-type construction elevator according to any one of claims 1 to 8,

the 1 st lifting body is a counterweight moving along a counterweight guide rail,

the 2 nd vertically movable body is a car that moves along a car guide rail.

Technical Field

The invention relates to an elevator for construction with an extended lift.

Background

Patent document 1 discloses an elevator for construction with an extended lift. The lift extension type construction elevator is an elevator which sequentially extends the lifting stroke of a car according to the progress of building construction. In a lift extension type construction elevator, a machine room unit on which a hoisting machine is mounted is raised in a hoistway to extend a lift stroke of a car. According to the elevator, the operators, materials and the like in the building construction can be efficiently conveyed.

Documents of the prior art

Patent document

Patent document 1: european patent specification No. 2804828

Disclosure of Invention

Problems to be solved by the invention

Generally speaking, the ropes of an elevator are twisted. If tension is applied in a state where excessive twisting occurs in the rope, twisting may occur. In order to prevent this, it is necessary to eliminate twisting of the ropes before the load of the elevating body is applied to the ropes. A method of eliminating the twisting of the rope is, for example, rotating the end of the rope being fed out. However, the rotation of the rope cannot be transmitted over the sheave of the hoisting machine. The rope in patent document 1 is wound in the order of a suspension sheave of a counterweight, a sheave of a hoisting machine, and a suspension sheave of a car connected to a machine room unit, which are located in a lower portion of a hoistway, and then connected to the machine room unit. In this case, since most of the ropes are located between the traction machine and the rope drum, the twisting of the ropes cannot be eliminated by the above-described method.

The present invention has been made to solve the above problems. The purpose is to provide a lift extension type construction elevator capable of eliminating rope twisting.

Means for solving the problems

The lift extension type construction elevator of the invention comprises: a machine room unit which can be lifted and lowered in a hoistway and on which a hoisting machine is mounted; a 1 st lifting body which can be lifted and lowered in the hoistway, and a load of the 1 st lifting body can be supported by the machine room unit; and a 2 nd lifting body which can be lifted and lowered in the hoistway, wherein a load of the 2 nd lifting body can be supported at a lower portion of the hoistway, and a rope fed out from a rope reel mounted on the machine room unit is wound around a sheave of the hoisting machine after being wound around a suspension sheave of the 1 st lifting body, is wound around a suspension sheave of the 2 nd lifting body after being wound around a sheave of the hoisting machine, and is connected to the machine room unit after being wound around a suspension sheave of the 2 nd lifting body.

Effects of the invention

According to the present invention, the rope fed from the rope reel mounted in the machine room unit is wound around the rope sheave of the hoisting machine after being wound around the suspension sheave of the 1 st hoisting body, is wound around the suspension sheave of the 2 nd hoisting body after being wound around the rope sheave of the hoisting machine, and is connected to the machine room unit after being wound around the suspension sheave of the 2 nd hoisting body. Therefore, the twisting of the rope of the extended-lift construction elevator can be eliminated.

Drawings

Fig. 1 is a schematic view showing a 1 st example of a construction elevator of embodiment 1.

Fig. 2 is a schematic diagram showing a 2 nd example of the lift-extended construction elevator according to embodiment 1.

Fig. 3 is a schematic diagram showing a 3 rd example of the lift-extended construction elevator according to embodiment 1.

Fig. 4 is a front view showing a configuration example of the machine room unit in embodiment 1.

Fig. 5 is a front view showing another configuration example of the machine room unit in embodiment 1.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. Duplicate descriptions are appropriately simplified or omitted.

Embodiment 1.

Fig. 1 is a schematic view showing a 1 st example of a construction elevator of embodiment 1.

Fig. 1 shows a situation in a hoistway, not shown, of a building under construction. The lift extension type construction elevator comprises a 1 st lifting body 1, a 2 nd lifting body 2, a machine room unit 3 and a tractor. A plurality of ropes 5 are wound around a sheave 4 of the hoisting machine.

The 1 st vertically movable body 1 is one of a car and a counterweight of an elevator. The 2 nd lifting body 2 is the other of the car and the counterweight of the elevator. Fig. 1 illustrates a case where the 1 st vertically movable body 1 is a car and the 2 nd vertically movable body 2 is a counterweight. In this case, the 1 st vertically movable body 1 can be moved up and down in the hoistway along a pair of car guide rails, not shown. In this case, the 2 nd vertically movable body 2 can be moved up and down in the hoistway along a pair of pairs of heavy guide rails, not shown.

The load of the 2 nd vertically movable body 2 can be supported in the lower part of the hoistway. The 2 nd elevating body 2 may be mounted on a buffer provided in a pit, for example. The 2 nd vertically movable body 2 may be fixed to a car guide rail or a counterweight guide rail, for example. The 2 nd vertically movable body 2 may be fixed to a structure on the building side under construction, for example.

The machine room unit 3 can be raised and lowered in the hoistway along at least one of the car guide rail and the counterweight guide rail, for example. The machine room unit 3 can be fixed to, for example, a car guide rail, a counterweight guide rail, or a structure on the building side under construction.

The machine room unit 3 is mounted with, for example, a hoisting machine, a control panel not shown, and a plurality of rope reels 6. For example, two or more direction conversion devices are provided in the machine room unit 3. Fig. 1 shows a case where the 1 st direction switching pulley 8 and the 2 nd direction switching pulley 9 are provided as the direction switching means. In fig. 1, a pulley is shown as an example of the direction switching device, but the direction switching device may not have a pulley structure as long as the direction of the rope 5 can be switched and the rope 5 can smoothly slide on the direction switching device.

The number of rope drums 6 corresponds to the number of ropes 5 used in the elevator. For example, when 6 ropes 5 are used in an elevator, 6 rope reels 6 are mounted in the machine room unit 3. A rope 5 having a length corresponding to a lifting stroke in a completed building state is wound around each rope reel 6 in advance.

The machine room unit 3 is provided with, for example, a coupling device 7 and a rope holding device 10. The coupling device 7 and the rope gripping device 10 are provided at positions overlapping with the 1 st vertically movable body 1, for example, when viewed in the vertical direction. The coupling device 7 and the rope gripping device 10 are provided, for example, in the vicinity of a car guide rail or a counterweight guide rail in the horizontal direction.

The coupling device 7 can suspend the 1 st vertically movable body 1. The connecting device 7 is a device having a hoisting function, such as a chain block or a winch. In a state where the 1 st vertically movable body 1 is suspended by the coupling device 7, the load of the 1 st vertically movable body 1 is supported by the machine room unit 3. In a state where the 1 st vertically movable body 1 is coupled to the machine room unit 3, the center of gravity of the entire machine room unit 3 is closer to the 1 st vertically movable body 1 side than before the coupling due to the influence of the mass of the 1 st vertically movable body 1.

The rope gripping device 10 can grip the rope 5 in a sandwiched manner, for example. The rope gripping device 10 can simultaneously grip at least as many ropes 5 as the number of rope reels 6.

The direction conversion device is provided above the hoisting machine, for example. The direction conversion device is fixed to, for example, the frame of the machine room unit 3.

The 1 st direction switching pulley 8 is provided, for example, in the vicinity of the rope reel 6 and receives the rope 5 fed from the rope reel 6 first. The 1 st direction switching pulley 8 may be disposed at any position of the upper, lower, left, and right sides with respect to the rope drum 6. As an example, fig. 1 shows a case where the 1 st direction switching pulley 8 is disposed above the rope reel 6. The 1 st direction switching pulley 8 functions to perform direction switching of the rope 5 and to guide the rope 5 without interfering with other devices by suppressing the amount of movement of the rope 5 reciprocating in the axial direction of the rope drum 6 when discharged from the rope drum 6 in the vicinity of the rope drum 6.

The 2 nd direction switching pulley 9 is provided at a position overlapping with the 1 st vertically movable body 1, for example, when viewed from the vertical direction. The 2 nd direction switching sheave 9 is provided, for example, in the horizontal direction near between a pair of car guide rails or near between a pair of counterweight guide rails. The 2 nd direction switching sheave 9 functions to switch the direction of the rope 5 and to determine a position at which the rope 5 is lowered in the vertical direction toward the suspending sheave of the 1 st vertically movable body 1. The 2 nd direction switching pulley 9 is disposed mainly above the suspending pulley of the 1 st vertically movable body 1. When the 2 nd direction switching pulley 9 can also function as the 1 st direction switching pulley 8, the 1 st direction switching pulley 8 may not be provided.

The ropes 5 fed from the rope reels 6 are first wound around the direction switching device, for example. The ropes 5 are wound around the 1 st direction-switching pulley 8 and then wound around the 2 nd direction-switching pulley 9, for example. The ropes 5 are wound around the 2 nd direction switching pulley 9 and then passed through the rope holding device 10. Each rope 5 is wound around a suspension sheave of the 1 st vertically movable body 1 after passing through the rope gripping device 10, for example. The ropes 5 are wound around, for example, a suspending sheave of the 1 st vertically movable body 1 and then wound around a sheave 4 of the hoisting machine. The ropes 5 are wound around, for example, a sheave 4 of the hoisting machine and then wound around a suspending sheave of the 2 nd vertically movable body 2. The ropes 5 are connected to the machine room unit 3 after being wound around, for example, a suspension sheave of the 2 nd vertically movable body 2.

The ends of the ropes 5 are connected to the machine room unit 3, for example, with separate shackles. The shackle side rope ends 11 are located, for example, at the lower end of the machine room unit 3.

The rope gripping device 10 can grip the rope 5 positioned between the rope reel 6 and the suspension sheave of the 1 st vertically movable body 1. In a state where the 1 st vertically movable body 1 is not suspended by the coupling device 7 and the rope 5 is gripped by the rope gripping device 10, loads of the 1 st vertically movable body 1 and the 2 nd vertically movable body 2 are applied to the rope 5. When the hoisting machine is driven in this state, the 1 st hoist 1 and the 2 nd hoist 2 move in a range below the machine room unit 3 in the building under construction. This range is the lift stroke of the 1 st lift body 1 and the 2 nd lift body 2 at the present time. The hoisting machine is controlled by a control panel mounted on the machine room unit 3, for example. The lifting stroke of the 1 st and 2 nd lifting bodies 1 and 2 is extended according to the progress of the building construction.

When the lifting stroke is extended, the load of the 1 st lifting body 1 is supported by the machine room unit 3 via the coupling device 7. When the elevating stroke is extended, the load of the 2 nd elevating body 2 is supported at the lower part of the hoistway. That is, the lifting stroke is extended in a state where the loads of the 1 st and 2 nd vertically movable bodies 1 and 2 are not applied to the rope 5. The hoisting stroke is extended by hoisting the machine room unit 3 and the 1 st vertically movable body 1 using the hoisting device 12 in a state where the rope 5 is not gripped by the rope gripping device 10. The hoisting device 12 is, for example, a tower crane or a winch.

The hoisting of the machine room unit 3 and the 1 st lifting body 1 must be performed in a state where the hoisting rope of the hoisting device 12 catches the position of the center of gravity of the hoisting object in consideration of the safety of the work. In the state where the 1 st hoist 1 is coupled, the center of gravity of the machine room unit 3 is close to the 1 st hoist 1, and therefore the hoist rope of the hoisting device 12 is connected to, for example, a suspension base provided near the upper side of the 1 st hoist 1.

In the example shown in fig. 1, when the machine room unit 3 and the 1 st vertically movable body 1 are lifted by the lifting device 12, the rope 5 is fed from the rope reel 6. The 2 nd vertically movable body 2 is supported in the lower part of the hoistway. The length of the ropes 5 located below the machine room unit 3 increases according to the amount of ascent of the machine room unit 3 and the 1 st elevating body 1. The machine room unit 3 reaching the destination floor is fixed. As a result, the lifting stroke of the 1 st lifting body 1 and the 2 nd lifting body 2 is extended.

A twist may occur in the rope 5 fed from the rope reel 6. If the shackle side rope ends 11 are rotated in a state where the loads of the 1 st and 2 nd elevating bodies 1 and 2 are not applied to the ropes 5, the twist of the ropes 5 located in the range from the shackle side rope ends 11 to the sheave 4 of the traction machine disappears. Since most of the ropes 5 fed from the rope reel 6 are positioned between the shackle side rope ends 11 and the sheave 4 of the hoisting machine, twisting of the ropes 5 can be sufficiently eliminated by rotating the shackle side rope ends 11.

The feeding of the rope 5 from the rope reel 6 and the untwisting elimination of the rope 5 are repeated during construction.

Fig. 2 is a schematic diagram showing a 2 nd example of the lift-extended construction elevator according to embodiment 1.

The following description focuses on differences from the example shown in fig. 1 with respect to the example shown in fig. 2.

In the example shown in fig. 2, a 3 rd direction changing pulley 13 as a direction changing device is provided. The 3 rd direction switching pulley 13 can move to a place other than the machine room unit 3. The 3 rd direction switching sheave 13 is guided by at least one of a car guide rail and a counterweight guide rail, for example. The 3 rd direction switching pulley 13 can be fixed to at least one of the machine room unit 3 and a structure in the hoistway. The structures in the hoistway include, for example, a car guide rail, a counterweight guide rail, and a structure on the building side during construction. When the 3 rd direction switching pulley 13 can also function as the 2 nd direction switching pulley 9, the 2 nd direction switching pulley 9 may not be provided. The 3 rd direction switching pulley 13 functions to switch the direction of the rope 5, and by lifting the 3 rd direction switching pulley 13 before the machine room unit 3 is lifted, it is possible to perform an operation of pulling out the rope 5 from the rope reel 6 in advance.

In the example shown in fig. 2, each rope 5 is wound around the 1 st direction-changing pulley 8 and then wound around the 3 rd direction-changing pulley 13, for example. The ropes 5 are wound around the 3 rd direction switching pulley 13 and then passed through the rope holding device 10. After being wound around the direction switching device, the sequence of winding the rope 5 around the suspending sheave of the 1 st vertically movable body 1, the sheave 4 of the hoisting machine, and the suspending sheave of the 2 nd vertically movable body 2 is the same as that of the example shown in fig. 1. However, the positional relationship between the 1 st direction switching pulley 8 and the 3 rd direction switching pulley 13 in the depth direction in fig. 2 is set so that the rope 5 does not contact the hoist rope of the hoist 12. In fig. 2, as an example, a pulley is illustrated as a direction switching device that is movable in the height direction in the hoistway and is fixable to at least one of the machine room unit 3 and a structure in the hoistway, but the direction switching device may not be a pulley structure as long as the direction of the rope 5 can be switched and the rope 5 can smoothly slide on the direction switching device.

In the example shown in fig. 2, only the 3 rd direction switching pulley 13 is hoisted before the machine room unit 3 and the 1 st hoist 1 are hoisted by the hoisting device 12. The hoisting of the 3 rd direction switching sheave 13 is performed by another hoisting device different from the hoisting device 12. The other hoisting device is, for example, a winch or the like provided above a position predetermined as the next fixed position of the machine room unit 3.

In the example shown in fig. 2, when only the 3 rd direction switching pulley 13 is lifted in a state where the rope 5 is gripped by the rope gripping device 10, the rope 5 is fed from the rope reel 6. The lifted 3 rd direction switching pulley 13 is fixed to a structure in the hoistway, for example, near the next fixed position of the machine room unit 3. Thereafter, the machine room unit 3 and the 1 st vertically movable body 1 are lifted by the lifting device 12 in a state where the rope 5 is not gripped by the rope gripping device 10, thereby extending the lifting stroke. In the operation of hoisting the machine room unit 3 and the 1 st vertically movable body 1, it is preferable to suppress, for example, the rotation of the rope reel 6.

In the example shown in fig. 2, the twist occurring in the rope 5 fed from the rope reel 6 is eliminated in the same manner as in the example shown in fig. 1.

Fig. 3 is a schematic diagram showing a 3 rd example of the lift-extended construction elevator according to embodiment 1.

The following description focuses on differences from the example shown in fig. 1 or 2 with respect to the example shown in fig. 3.

In the example shown in fig. 3, in the machine room unit 3, a 4 th direction changing pulley 14 is provided as a direction changing device for guiding the path of the rope 5 in addition to the 2 nd direction changing pulley 9 and the 3 rd direction changing pulley 13. In fig. 3, a pulley is shown as an example of the direction switching device for guiding the path of the rope 5, but the direction switching device may not have a pulley structure as long as the direction of the rope 5 can be switched and the rope 5 can smoothly slide on the direction switching device. The 4 th direction switching pulley 14 functions to arrange the 3 rd direction switching pulley 13 at a position closer to the center of the 2 nd vertically movable body 2 than the center of the 1 st vertically movable body 1 in the horizontal direction. By further providing the 4 th direction switching pulley 14, the space above the 1 st elevating body 1 in the space above the machine room unit 3 can be secured, and therefore, the interference between the 3 rd direction switching pulley 13 and the rope 5 and the hoist rope of the hoisting device 12 can be reliably avoided.

In the example shown in fig. 3, the 4 th direction-changing pulley 14 is fixed to, for example, the frame of the machine room unit 3. The 4 th direction switching pulley 14 is provided so that the rope 5 between the 3 rd direction switching pulley 13 and the 2 nd direction switching pulley 9 passes through the 4 th direction switching pulley 14. The 4 th direction switching sheave 14 is provided on the 2 nd elevating body 2 side with respect to a hoist rope of the hoisting device 12, for example.

By providing the 3 rd direction switching pulley 13, the 1 st direction switching pulley 8 may not be provided even if the 1 st direction switching pulley 8 is not provided and the rope 5 does not interfere with other equipment of the machine room unit 3. Fig. 3 illustrates a case where the 1 st direction switching pulley 8 is not provided.

In the example shown in fig. 3, the ropes 5 fed from the rope drums 6 are wound around the 3 rd direction switching pulley 13 and then wound around the 4 th direction switching pulley 14, for example. The ropes 5 are wound around the 4 th direction-switching pulley 14, for example, and then wound around the 2 nd direction-switching pulley 9. The ropes 5 are wound around the 2 nd direction switching pulley 9 and then passed through the rope holding device 10. Each rope 5 is wound around a suspension sheave of the 1 st vertically movable body 1 after passing through the rope gripping device 10, for example. The ropes 5 are wound around, for example, a suspending sheave of the 1 st vertically movable body 1 and then wound around a sheave 4 of the hoisting machine. The ropes 5 are wound around, for example, a sheave 4 of the hoisting machine and then wound around a suspending sheave of the 2 nd vertically movable body 2. The ropes 5 are connected to the machine room unit 3 after being wound around, for example, a suspension sheave of the 2 nd vertically movable body 2.

In the example shown in fig. 3, only the 3 rd direction switching pulley 13 is hoisted before the machine room unit 3 and the 1 st hoist 1 are hoisted by the hoisting device 12. The hoisting of the 3 rd direction switching sheave 13 is performed by another hoisting device in the same manner as the example shown in fig. 2.

In the example shown in fig. 3, when only the 3 rd direction switching pulley 13 is lifted in a state where the rope 5 is gripped by the rope gripping device 10, the rope 5 is fed from the rope reel 6. The lifted 3 rd direction switching pulley 13 is fixed to a structure in the hoistway, for example, near the next fixed position of the machine room unit 3. Thereafter, the machine room unit 3 and the 1 st vertically movable body 1 are lifted by the lifting device 12 in a state where the rope 5 is not gripped by the rope gripping device 10, thereby extending the lifting stroke. In the operation of hoisting the machine room unit 3 and the 1 st vertically movable body 1, it is preferable to suppress, for example, the rotation of the rope reel 6.

In the example shown in fig. 3, the twist occurring in the rope 5 fed from the rope reel 6 is eliminated in the same manner as in the example shown in fig. 1.

Fig. 4 is a front view showing a configuration example of the machine room unit in embodiment 1.

Fig. 4 shows an example of the structure of the machine room unit 3 of the extended-lift construction elevator shown in fig. 1.

In the example shown in fig. 4, a direction switching device and six rope reels 6 are arranged in the upper part of the machine room unit 3. The three rope drums 6, not shown, are disposed on the back side of each of the three rope drums 6, not shown. A hoisting machine 15 and shackle side rope ends 11 are arranged at the lower part of the machine room unit 3. A rope holding device 10 and a control panel 16 are disposed in the middle portion in the vertical direction of the machine room unit 3. The control panel 16 is electrically connected to, for example, the hoisting machine 15 and a car device not shown.

In the example shown in fig. 4, the 1 st direction-changing pulley 8 in the direction-changing device is not provided in the machine room unit 3. The ropes 5 fed from the rope reels 6 are first wound around the 2 nd direction switching pulley 9. Each rope 5 is wound around the 2 nd direction switching pulley 9, and then passed through the rope gripping device 10 to the suspending pulley of the 1 st vertically movable body 1.

In the example shown in fig. 4, a hoisting suspension base 17 is provided at the upper end of the machine room unit 3. The position of the hoisting suspension base 17 is disposed near the upper side of the 1 st vertically movable body 1 so as to correspond to a position close to the center of gravity of the machine room unit 3 in a state where the 1 st vertically movable body 1 is coupled. A hoist rope of the hoisting device 12 is connected to the hoisting suspension base 17.

Fig. 5 is a front view showing another configuration example of the machine room unit in embodiment 1.

Fig. 5 shows an example of the structure of the machine room unit 3 of the extended-lift construction elevator shown in fig. 3. The following description focuses on differences from the example shown in fig. 4 with respect to the example shown in fig. 5.

In the example shown in fig. 5, the 1 st direction-switching pulley 8, the 2 nd direction-switching pulley 9, the 3 rd direction-switching pulley 13, and the 4 th direction-switching pulley 14 are disposed on the upper portion of the machine room unit 3. The 3 rd direction switching pulley 13 may be fixed to the machine room unit 3 or may be fixed to the guide rail for the 2 nd vertically movable body 2.

In the example shown in fig. 5, the 1 st direction switching pulley 8 is provided in the vicinity of the rope reel 6. The 3 rd direction changing pulley 13 is disposed at the same height as or above the 1 st direction changing pulley 8. The 4 th direction switching pulley 14 is disposed at the same height as or below the 1 st direction switching pulley 8. The 2 nd direction switching pulley 9 is provided between the pair of guide rails for the 1 st elevating body 1. The 2 nd direction changing pulley 9 is disposed at the same height as or below the 1 st direction changing pulley 8.

In the example shown in fig. 5, each rope 5 fed from the plurality of rope drums 6 is wound around the 1 st direction switching pulley 8 and then wound around the 3 rd direction switching pulley 13. The ropes 5 are wound around the 3 rd direction changing pulley 13 and then wound around the 4 th direction changing pulley 14. The ropes 5 are wound around the 4 th direction-changing pulley 14 and then wound around the 2 nd direction-changing pulley 9. Each rope 5 is wound around the 2 nd direction switching pulley 9, and then passed through the rope gripping device 10 to the suspending pulley of the 1 st vertically movable body 1.

In the example shown in fig. 5, by winding the ropes 5 around the 4 th direction-switching pulley 14 and the 2 nd direction-switching pulley 9, the ropes 5 are positioned inside the machine room unit 3 in the horizontal direction within the range of the 1 st vertically movable body 1. Even if the 3 rd direction switching pulley 13 is hoisted, the ropes 5 do not pass right above the hoisting support base 17.

In the example shown in fig. 5, by winding and suspending each rope 5 on the 1 st direction-switching pulley 8 before winding and suspending each rope 5 on the 3 rd direction-switching pulley 13, the angle of each rope 5 fed from the plurality of rope reels 6 is kept constant even if the 3 rd direction-switching pulley 13 is suspended.

According to embodiment 1 described above, the machine room unit 3 mounts the hoisting machine 15 and the rope reel 6. The load of the 1 st elevating body 1 can be supported by the machine room unit 3. The load of the 2 nd vertically movable body 2 can be supported in the lower part of the hoistway. The rope 5 fed from the rope reel 6 mounted in the machine room unit 3 is wound around the sheave 4 of the hoisting machine 15 after being wound around the suspension sheave of the 1 st vertically movable body 1, is wound around the suspension sheave of the 2 nd vertically movable body 2 after being wound around the sheave 4 of the hoisting machine 15, and is connected to the machine room unit 3 after being wound around the suspension sheave of the 2 nd vertically movable body 2. Therefore, the twisting of the rope of the extended-lift construction elevator can be eliminated.

Further, a 3 rd direction switching pulley 13 that is movable in the height direction in the hoistway is provided in the machine room unit 3. The 3 rd direction switching pulley 13 can be fixed to, for example, the machine room unit 3 or a structure in the hoistway. The rope 5 fed out from the rope reel 6 is wound around, for example, the 3 rd direction switching pulley 13 and then wound around the suspending pulley of the 1 st vertically movable body 1. In this case, the rope 5 can be fed out from the rope reel 6 in advance before the machine room unit 3 and the 1 st vertically movable body 1 are hoisted by the hoisting device 12. As a result, since the direction in which the rope 5 is pulled out is opposite to the direction in which the weight is applied, if the rope 5 is fixed by the rope gripping device 10, it is difficult for the rope 5 to be excessively fed out from the rope reel 6 due to the weight of the rope 5, and the rope can be safely pulled out.

Further, in the housing unit 3, for example, a 4 th direction switching pulley 14 and a 2 nd direction switching pulley 9 are provided, the 4 th direction switching pulley 14 is used for performing direction switching of the rope 5, and the 2 nd direction switching pulley 9 is used for guiding the rope 5 to the suspension wheel position of the 1 st elevating body 1. The 3 rd direction switching pulley 13 is disposed on the opposite side of the 1 st vertically movable body 1 as viewed from the center of the machine room unit 3, for example, in the horizontal direction. The rope 5 fed out from the rope reel 6 is wound around, for example, the 3 rd direction changing pulley 13, then passes through the 4 th direction changing pulley 14, and further passes through the 2 nd direction changing pulley 9, and then is wound around the suspending pulley of the 1 st vertically movable body 1. Thus, the 3 rd direction switching pulley 13 is not located above the machine room unit 3 in the range where the 1 st vertically movable body 1 is located in the horizontal direction. In this case, interference between the hoist rope of the hoisting device 12 and the rope 5 can be reliably avoided.

The 1 st vertically movable body 1 may be, for example, a car that moves along a car guide rail, or a counterweight that moves along a counterweight guide rail. The 2 nd vertically movable body 2 is a counterweight when the 1 st vertically movable body 1 is a car, and is a car when the 1 st vertically movable body 1 is a counterweight. On the other hand, by using the 1 st vertically movable body 1 as a car and the 2 nd vertically movable body 2 as a counterweight, the car having a lighter weight is coupled to the machine room unit 3, so that the load applied to the hoisting device 12 can be reduced.

Industrial applicability

The invention can be used for the lift extension type construction elevator.

Description of the reference symbols

1: a 1 st elevating body;

2: a 2 nd elevating body;

3: a machine room unit;

4: a sheave;

5: a rope;

6: a rope drum;

7: a connecting device;

8: 1 st direction change pulley;

9: a 2 nd direction switching pulley;

10: a rope holding device;

11: shackle side cord ends;

12: a hoisting device;

13: a 3 rd direction switching pulley;

14: a 4 th direction switching pulley;

15: a traction machine;

16: a control panel;

17: a suspension base for hoisting.