CN114364627B - construction hoist - Google Patents

Abstract

The invention provides a construction lifter, which comprises a guide rail, a machine room unit, a lift car and a crane. The machine room unit has a casing on which a hoisting machine is mounted. The machine room unit has: an emergency stop device for stopping the lifting movement of the mechanical chamber unit; and a speed detecting device provided in the case and configured to operate the emergency stop device when the lifting speed of the machine room unit is equal to or higher than a predetermined speed. The emergency stop device has a brake member which is opposed to the guide rail with a gap therebetween in a normal state in which the emergency stop device is not operated, and which is brought into contact with the guide rail when operated.

Description

construction hoist

technical field

The present invention relates to construction elevators.

Background technique

In recent years, construction elevators have been proposed as elevators for transporting materials and workers during building construction. This construction elevator raises a machine room unit including a traction machine, a control panel, and the like according to the progress of building construction, thereby expanding the range in which a car can be raised and lowered.

In addition, construction elevators are equipped with emergency stop devices that stop the lifting movement of the machine room unit in an emergency in order to prevent the machine room unit from falling as a safety device (for example, refer to Patent Document 1).

prior art literature

patent documents

Patent Document 1: International Publication No. 2012/072860

Contents of the invention

The technical problem to be solved by the invention

However, in the technology disclosed in Patent Document 1, the stopper of the emergency stop device that clamps the guide rails to stop the vertical movement of the machine room unit is always in contact with the guide rails. Therefore, when the machine room unit is moved up and down, there is a risk that the brakes will rub against the guide rails and cause damage to the guide rails.

Furthermore, when installing the machine room unit at a predetermined position of the lift path, the machine room unit is first raised to a position above the predetermined position, and then the machine room unit is lowered to be installed at the predetermined position. Therefore, in the technique disclosed in Patent Document 1, when the machine room unit is lowered, the emergency stop device is activated, and when the machine room unit is moved up and down again, it is necessary to release the operation of the emergency stop device. As a result, in the technique disclosed in Patent Document 1, the work of moving up and down the machine room unit to install it at a predetermined position is very cumbersome.

An object of the present invention is to provide a construction elevator that can easily perform installation work of a machine room unit without damaging the guide rails in consideration of the above-mentioned problems.

Technical solutions for solving problems

In order to solve the above-mentioned problems and achieve the object, a construction elevator includes a guide rail vertically installed in an elevator passage of a building, a machine room unit, a car, and a crane.

The machine room unit has a housing on which the traction machine is placed, which is supported up and down by the guide rails. The car is vertically supported on the guide rails and connected to the ropes wound around the traction machine. The crane lifts and moves the mechanical room unit.

The machine room unit has: an emergency stop device installed on the box to stop the lifting movement of the machine room unit; detection device. The emergency stop device has a stopper that opposes the guide rail with a gap therebetween in a normal state where the emergency stop device is not in operation, and contacts the guide rail during operation.

Invention effect

According to the construction elevator constructed as described above, installation work of the machine room unit can be easily performed without causing damage to the guide rail.

Description of drawings

Fig. 1 is a schematic configuration diagram showing a construction elevator according to a first embodiment.

Fig. 2 is a front view showing the speed detection device of the construction elevator according to the first embodiment.

Fig. 3 is a schematic configuration diagram showing the emergency stop device of the construction elevator according to the first embodiment.

Fig. 4 is an explanatory diagram showing an installation operation of a machine room unit of the construction elevator according to the first embodiment.

Fig. 5 is an explanatory view showing an installation operation of a machine room unit of the construction elevator according to the first embodiment.

Fig. 6 is an explanatory diagram showing an installation operation of a machine room unit of the construction elevator according to the first embodiment.

Fig. 7 is a front view showing a state in which the speed detection device of the construction elevator according to the first embodiment is operated.

Fig. 8 is a schematic configuration diagram showing a state in which the emergency stop device of the construction elevator according to the first embodiment is activated.

9 is a schematic configuration diagram showing a speed detection device and a guide unit of a construction elevator according to a second embodiment.

Detailed ways

Hereinafter, a construction elevator according to an embodiment will be described with reference to FIGS. 1 to 9 . In addition, the same code|symbol is attached|subjected to the common member in each figure.

1. Example of the first embodiment

1-1. Structural example of a construction elevator

First, the structure of the construction elevator of the first embodiment (hereinafter referred to as "this example") will be described with reference to FIG. 1 .

FIG. 1 is a schematic configuration diagram showing a construction elevator of this example.

The elevator shown in FIG. 1 is a construction elevator used to transport materials and workers during building construction. As shown in Figure 1, construction elevator 1 comprises the guide rail 2 that vertically arranges along the hoisting path 201 of building 200, machine room unit 3, the car 4 that carries operator and material, support member 5, and machine room Unit 3 is lifted by crane 6. The car 4 and the machine room unit 3 move up and down along the guide rail 2 . Hereinafter, the direction in which the car 4 and the machine room unit 3 move up and down is referred to as the up-down direction. In addition, a support recessed portion 202 is formed on a wall surface 201 a of the lift passage 201 to support the support member 5 and the machine room unit 3 .

The machine room unit 3 has a housing 10 , a traction machine 11 , a fixing mechanism 15 , a guide 16 , an emergency stop device 20 , and a speed detection device 21 . Inside the housing 10 , drive equipment for moving the car 4 up and down, such as a hoisting machine 11 and a control panel (not shown) that controls the driving of the hoisting machine 11 , is placed.

The housing 10 is provided with a guide portion 16 . The guide portion 16 is a slider that slidably engages with the guide rail 2 . The housing 10 is supported by the guide rail 2 via the guide portion 16 so as to be able to move up and down.

In addition, a fixing mechanism 15 and two emergency stop devices 20 , 20 are disposed at a lower portion in the vertical direction of the housing 10 . A speed detection device 21 is disposed on an upper portion in the vertical direction of the casing 10 . The speed detection device 21 detects the ascending and descending speed of the housing 10 , and when the descending speed of the housing 10 reaches a predetermined speed, the emergency stop device 20 is activated by the lifting rod 22 .

The two emergency stop devices 20 , 20 are arranged at positions facing the guide rail 2 in the lower portion of the housing 10 . In addition, the two emergency stop devices 20, 20 are connected via a link member not shown. The two emergency stop devices 20 and 20 operate in conjunction with each other via a link member not shown. When the emergency stop device 20 is working, it clamps the guide rail 2 to make the lifting movement of the box body 10 stop urgently. The detailed structures of the emergency stop device 20 and the speed detection device 21 will be described later.

The fixing mechanism 15 is configured to be expandable and contractible from the housing 10 with respect to the wall surface 201 a of the lifting passage 201 . The fixing mechanism 15 can be inserted into a support recess 202 formed in the lifting passage 201 . The fixing mechanism 15 supports the machine room unit 3 at a predetermined position of the lifting passage 201 . In addition, the fixing mechanism 15 is not limited to the above structure, and various other fixing mechanisms such as an engaging member engaging with the guide rail 2 or the wall surface 201a of the lifting passage 201 or a fastening member fastened to the wall surface 201a may be applied.

The traction machine 11 is installed in the box body 10 . A rope 13 is wound around a sheave of the hoisting machine 11 , and both ends thereof hang downward in the vertical direction of the housing 10 . The car 4 is connected to one end of the rope 13 , and a counterweight (not shown) is connected to the other end of the rope 13 .

The car 4 is disposed below the machine room unit 3 in the vertical direction. The car 4 is provided with a car-side guide portion 26 that is slidably engaged with the guide rail 2 . Driven by the hoisting machine 11 , the car 4 moves up and down along the guide rail 2 by the car-side guide portion 26 .

A support member 5 is disposed above the machine room unit 3 in the vertical direction. The support member 5 supports the machine room unit 3 via a crane 6 . Movable support portions 25 are provided at both end portions of the support member 5 . The movable support portion 25 is configured to be able to expand and contract. The supporting member 5 is transported to a predetermined position of the lifting passage 201 by a crane or an operator. The supporting member 5 is installed in the lifting passage 201 by inserting the movable supporting portion 25 into the supporting recessed portion 202 .

The structure in which the support member 5 is provided in the lifting passage 201 is not limited to the above example. As the supporting member 5, similarly to the fixing mechanism 15 of the machine room unit 3, an engaging member engaging with the guide rail 2 or the wall surface 201a of the lifting passage 201, or a fastening member fastened to the wall surface 201a, etc. may be applied. structure.

The crane 6 is provided at the upper part in the vertical direction of the box body 10 of the machine room unit 3 . A hoisting cable 6 a of a crane 6 is connected to the support part 5 . Driven by the crane 6 , the box body 10 of the machine room unit 3 moves up and down along the guide rail 2 . In this example, the example in which the crane 6 was installed in the machine room unit 3 and the hoisting rope 6a was connected to the support member 5 was demonstrated, but it is not limited to this. For example, a crane 6 may be provided on the supporting member 5 to connect the hoisting rope 6 a to the case 10 of the machine room unit 3 .

1-2. Configuration example of speed detection device

Next, the configuration of the speed detection device 21 will be described with reference to FIG. 2 .

FIG. 2 is a front view showing the speed detection device 21 .

As shown in FIG. 2 , the speed detection device 21 has a support base 31 placed on the upper portion of the housing 10 , a frame 32 , a rotating body 33 , two pendulums 34 and 35 , and an operating mechanism 36 .

The frame 32 is placed on the support base 31 and fixed to the support base 31 via a fixing member not shown. The frame 32 is provided with a rotation shaft 41 . The rotary body 33 is rotatably supported by a rotary shaft 41 . The rotating body 33 is rotatably supported by the frame 32 , and its outer peripheral surface is in contact with the guide rail 2 . Therefore, when the housing 10 moves up and down, the rotary body 33 rotates around the rotary shaft 41 .

By rotating the rotating body 33 in direct contact with the guide rail 2, there is no need to provide components for rotating the rotating body 33, and the number of parts can be reduced.

Two balance shafts 42 and 43 are fixed to the rotating body 33 . The first swing shaft 42 and the second swing shaft 43 are disposed at positions facing each other across the rotation shaft 41 .

The first pendulum 34 is rotatably supported by a first pendulum shaft 42 . The second pendulum 35 is rotatably supported by the second pendulum shaft 43 . The first pendulum 34 and the second pendulum 35 are formed in substantially circular arc shapes. The pendulum shafts 42 , 43 pass through positions deviated from the centers of gravity of the pendulums 34 , 35 .

The first pendulum 34 has one end 34 a and the other end 34 b bounded by the first pendulum axis 42 . Furthermore, the one end portion 34a is set to be heavier than the other end portion 34b. The second pendulum 35 has one end 35 a and the other end 35 b bounded by the second pendulum axis 43 . Furthermore, the one end portion 35a is set to be heavier than the other end portion 35b.

When the rotating body 33 rotates, the pendulums 34 and 35 rotate about the pendulum shafts 42 and 43 by centrifugal force. The one ends 34 a and 35 a of the pendulums 34 and 35 are displaced in a direction away from the rotating shaft 41 , that is, radially outward of the rotating body 33 . In addition, the other end portions 34 b, 35 b of the pendulums 34 , 35 are displaced in a direction approaching the rotation shaft 41 . In addition, the first pendulum 34 and the second pendulum 35 are connected by a connecting member 44 . Therefore, the displacement amount (rotation amount) of the first pendulum 34 when the centrifugal force acts is the same as the displacement amount of the second pendulum 35 when the centrifugal force acts.

One end of a balance spring 45 is fixed to the other end portion 35 b of the second pendulum 35 . The other end of the balance spring 45 is fixed to the rotating body 33 . The balance spring 45 resists displacement of the other end portion 34 b of the second pendulum 35 in a direction approaching the rotation shaft 41 . That is, when the centrifugal force acting on the pendulums 34 and 35 exceeds the resistance of the balance spring 45 , the balance spring 45 elastically deforms (compresses), and the pendulums 34 and 35 rotate around the balance shafts 42 and 43 .

The actuating mechanism 36 has a hook member 51 , an actuating arm 52 and a biasing member 54 . The hook member 51 is rotatably supported by a hook rotation shaft 53 provided on the frame 32 . A locking portion 51 a is formed at one end portion of the hook member 51 . The other end portion 51b of the hook member 51 is inserted into the inner side of the rotating body in the radial direction. The pendulums 34 and 35 rotate around the pendulum shafts 42 and 43 due to the centrifugal force, and when the one ends 34a and 35a of the pendulums 34 and 35 are displaced radially outward of the rotating body 33, the one ends 34a and 35a of the pendulums 34 and 35 are in contact with the hooks. The other end part 51b of the member 51 abuts.

One end portion of the actuation arm 52 in the longitudinal direction is provided on the support base 31 and is rotatably supported by the support portion 31 a via the rotation shaft 55 . The other end portion in the longitudinal direction of the actuator arm 52 is connected to the lift rod 22 through a connection portion 57 . In addition, a locking pin 56 is provided at an intermediate portion in the longitudinal direction of the actuation arm 52 . The locking portion 51 a of the hook member 51 is releasably locked to the locking pin 56 . When the locking portion 51 a is locked to the locking pin 56 , the rotational movement of the actuating arm 52 is restricted.

In addition, the urging member 54 is located between the support base 31 and the actuating arm 52 in a compressed state. The urging member 54 urges the other end portion of the actuating arm 52 to rotate upward in the vertical direction. As the urging member 54, for example, a compression spring is used. In addition, the urging member 54 is not limited to a compression spring, and various other elastic members such as rubber or leaf springs may be used.

When the locking between the locking pin 56 and the locking portion 51 a is released, the actuating arm 52 is urged upward in the vertical direction by the urging member 54 . Then, the actuator arm 52 rotates around the rotation shaft 55, and the other end portion of the actuator arm 52 goes upward in the vertical direction. As a result, the lifting rod 22 connected to the actuating arm 52 via the connecting portion 57 is lifted upward in the vertical direction.

The configurations of the speed detection device 21 and the actuating mechanism 36 are not limited to the above configurations, and various other configurations such as providing two balance springs or providing a ratchet mechanism can be applied.

1-3. Structural example of emergency stop device

Next, the configuration of the emergency stop device 20 will be described with reference to FIG. 3 .

FIG. 3 is a schematic configuration diagram showing the emergency stop device 20 .

As shown in FIG. 3 , the emergency stop device 20 has a housing 71 , a pair of stoppers 72 , 72 , a pair of rollers 73 , and a pair of guide members 74 , 74 . Inside the housing 71, a pair of stoppers 72, 72, a pair of rollers 73, and a pair of guide members 74 are disposed. A pair of guide members 74 and 74 are supported by the housing 71 and arranged at positions facing each other with the guide rail 2 interposed therebetween. The distance between the pair of guide members 74 and 74 is maintained at a constant distance by the case 71 .

An inclined surface 74 a is formed on the guide member 74 . The inclined surface portion 74 a is formed on the surfaces of the pair of guide members 74 facing each other. The inclined surface portion 74a is inclined so as to continuously approach the guide rail 2 as it goes upward in the vertical direction. Therefore, the space|interval of the inclined surface part 74a in a pair of guide member 74,74 becomes narrow as going up and down direction.

The roller 73 is arrange|positioned on the inclined surface part 74a. The roller 73 guides the pair of stoppers 72 , 72 movably in the up-down direction. The pair of stoppers 72 and 72 are supported by a not-shown holding member so as to be movable toward and away from each other. In addition, the stopper 72 is formed in a wedge shape.

A pair of stoppers 72 and 72 are arranged between the guide rail 2 and the roller 73 and the guide member 74 . In addition, in a normal state in which the emergency stop device 20 shown in FIG. 3 is not in operation, the pair of stoppers 72 are arranged at a lower portion in the vertical direction of the guide member 74 due to their own weight. At this time, the stopper 72 and the guide rail 2 are arranged with a gap S1 therebetween.

In addition, a pair of detents 72, 72 are connected to the lifting rod 22 (see FIGS. 2 and 3). When the lifting rod 22 is lifted upward in the vertical direction, the pair of stoppers 72 , 72 moves upward in the vertical direction along the roller 73 together with the lifting rod 22 .

The example in which the stopper 72 is formed in a wedge shape has been described, but the present invention is not limited thereto, and the stopper 72 may be formed in a spherical shape. In addition, the shape of the stopper 72 is preferably a wedge shape rather than a spherical shape in order to increase the contact area with the guide rail 2 during operation. In addition, an urging member which holds a pair of guide members 74 and 74 at a constant interval may be provided, and the structure of the emergency stop device 20 is not limited to the above-mentioned structure.

1-4. Example of installation operation of machine room unit

Next, an example in which the machine room unit 3 is raised and installed at an arbitrary position of the elevator passage 201 in order to expand the liftable range of the car 2 according to the construction progress of the building 200 will be described with reference to FIGS. 4 to 6 .

4 to 6 are explanatory views showing installation operations of the machine room unit 3 .

First, as shown in FIG. 4 , the machine room unit 3 is lifted with a crane 6 . Thereby, the load applied to the fixing mechanism 15 disappears. The fixing mechanism 15 is shrunk, and the fixing mechanism 15 is pulled out from the support recessed portion 202A.

Next, the machine room unit 3 is raised to a predetermined position by the crane 6 . At this time, as shown in FIG. 3 , the pair of stoppers 72 , 72 of the emergency stop device 20 are not in contact with the guide rail 2 . As a result, it is possible to prevent the guide rail 2 from being damaged by the brake member 72 rubbing against the guide rail 2 when the machine room unit 3 moves up and down.

In addition, the rotating body 33 (refer to FIG. 2 ) of the speed detection device 21 rotates with the upward movement of the machine room unit 3 . The mechanical chamber unit 3 rises at a speed at which the centrifugal force acting on the pendulums 34 and 35 does not exceed the resistance of the balance spring 45 . Therefore, the emergency stop device 20 is not activated by the actuating mechanism 36 of the speed detection device 21 .

Next, as shown in FIG. 5 , when the housing 10 of the machine room unit 3 is raised to a position where the fixing mechanism 15 faces the support recess 202B arranged above the support recess 202A, the drive of the crane 6 is stopped. As a result, the upward movement of the machine room unit 3 is stopped. At this time, the machine room unit 3 is raised upward in the vertical direction from the position where the machine room unit 3 is installed, and the machine room unit 3 is stopped. Then, the fixing mechanism 15 is extended, and the fixing mechanism 15 is inserted into the support recessed part 202B.

As shown in FIG. 6 , when the fixing mechanism 15 is inserted into the support recess 202B, the crane 6 is driven to lower the machine room unit 3 . Thereby, the fixing mechanism 15 is placed on the support recessed portion 202B, and the housing 10 of the machine room unit 3 is supported at an arbitrary position by the fixing mechanism 15 . As a result, the installation work of the machine room unit 3 is completed, and the liftable range of the car 4 is expanded.

When the mechanical room unit 3 is moved down, the descending speed of the mechanical room unit 3 is the speed at which the centrifugal force acting on the pendulum 34, 35 does not exceed the resistance of the balance spring 45, and the pair of braking members 72, 72 of the emergency braking device 20 do not Contact with rail 2. Therefore, when the machine room unit 3 moves downward, the emergency stop device 20 does not operate unintentionally.

As a result, the fixing mechanism 15 can be smoothly placed on the support recessed portion 202B, and the installation work of the machine room unit 3 can be easily performed. Furthermore, the machine room unit 3 can be moved up and down immediately without performing recovery work of the emergency stop device 20 .

In addition, in a general elevator, a governor for detecting the speed of the car is installed on the upper portion of the elevator passage, and a speed regulating cable connected to the car is wound around a pulley of the governor. On the other hand, in the construction elevator 1 of this example, the speed detection device 21 which detects the speed of the machine room unit 3 is provided in the housing 10 which moves up and down. Thereby, a speed regulating cable, a pulley, etc. are unnecessary, and the number of parts can be reduced. Furthermore, because there is no speed regulating cable, even if the machine room unit 3 moves up and down, the position in the lifting passage 201 changes, and there is no need to perform operations such as adjusting the length and tension of the speed regulating cable, and the mechanical movement can be easily carried out. Installation work of the room unit 3.

1-5. Operation of speed detection device and emergency stop device

Next, an operation example of the speed detection device 21 and the emergency stop device having the above-mentioned configuration will be described with reference to FIGS. 7 and 8 .

FIG. 7 is a diagram showing a state in which the speed detection device 21 is in operation, and FIG. 8 is a diagram showing a state in which the emergency stop device 20 is in operation.

When the lowering speed (elevating speed) of the machine room unit 3 reaches a predetermined speed or higher due to abnormality of the crane 6 or cutting of the hoisting rope 6a, the rotational speed of the rotating body 33 of the speed detection device 21 increases. The pendulums 34 and 35 rotate around the pendulum shafts 42 and 43 by centrifugal force, and one ends 34 a and 35 a of the pendulums 34 and 35 are displaced radially outward of the rotating body 33 against the resistance of the balance spring 45 . Therefore, as shown in FIG. 7 , the one end portions 34 a, 35 a of the pendulums 34 , 35 come into contact with the other end portion 51 b of the hook member 51 .

Then, the hook member 51 rotates around the hook rotation shaft 53 , and the lock between the locking pin 56 and the locking portion 51 a is released. Accordingly, the actuating arm 52 is rotated around the rotation shaft 55 by the urging force of the urging member 54, and the other end portion of the actuating arm 52 goes upward in the vertical direction. As a result, the lifting rod 22 connected to the actuating arm 52 via the connecting portion 57 is lifted upward in the vertical direction.

As the lifting rod 22 is lifted up and down, as shown in FIG. In addition, the pair of stoppers 72 , 72 moves in a direction approaching the guide rail 2 by moving upward in the vertical direction, and comes into contact with the guide rail 2 . Thereby, a pair of stopper 72,72 pinches the guide rail 2, and the descending movement of the machine room unit 3 is stopped mechanically. As a result, the machine room unit 3 can be prevented from falling, and the safety of the construction elevator 1 can be improved.

2. Example of the second embodiment

Next, a construction elevator according to a second embodiment will be described with reference to FIG. 9 .

Fig. 9 is a plan view showing a guide portion and a speed detection device of a construction elevator according to a second embodiment.

The difference between the construction elevator of the second embodiment and the construction elevator 1 of the first embodiment lies in the structure of the guide portion and the structure of rotating the rotating body 33 of the speed detection device 21 . Therefore, here, the same code|symbol is attached|subjected to the part common to the construction elevator 1 of 1st Embodiment, and duplicative description is abbreviate|omitted.

As shown in FIG. 9 , a guide portion 80 and a speed detection device 21 are disposed on the upper portion of the housing 10 . The guide portion 80 has a rotation support portion 82 and three guide rollers 84A, 84B, and 84C rotatably supported by the rotation support portion 82 .

The second guide roller 84B and the third guide roller 84C are arranged facing each other with the guide rail 2 interposed therebetween. Moreover, 84 A of 1st guide rollers are arrange|positioned facing the guide rail 2 between the 2nd guide roller 84b and 84 C of 3rd guide rollers. The three guide rollers 84A, 84B, and 84C are in contact with the guide rail 2 . The three guide rollers 84A, 84B, and 84C rotate as the case 10 of the machine room unit 3 moves up and down.

In addition, the first guide roller 84A and the rotating body 33 of the speed detection device 21 are connected by a synchronous shaft 85 . The rotational force of the first guide roller 84A is transmitted to the rotating body 33 of the speed detection device 21 through the synchronizing shaft 85 . Therefore, when the housing 10 moves up and down and the first guide roller 84A rotates, the rotating body 33 of the speed detection device 21 also rotates. Thereby, the lifting speed of the housing 10 can be detected.

Also in the construction elevator of the second embodiment, when the descending speed (elevating speed) of the machine room unit 3 reaches a predetermined speed or more, the rotational speed of the rotating body 33 of the speed detecting device 21 increases, and the operation of the speed detecting device 21 Actuating mechanism 36 (referring to Fig. 7) work. As a result, the lifting rod 22 is lifted upward in the vertical direction by the actuating arm 52 of the speed detection device 21, and the emergency stop device 20 operates.

The other structures are the same as those of the construction elevator 1 according to the first embodiment, and therefore description thereof will be omitted. Also according to the construction elevator having such a structure, the same operational effect as that of the construction elevator 1 of the above-mentioned first embodiment can be obtained.

In addition, in the construction elevator according to the second embodiment, an adjustment mechanism for adjusting the rotational speed may be provided on the synchronous shaft 85 .

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made within a range not departing from the gist of the present invention.

In addition, in this specification, words such as "parallel" and "orthogonal" are used, but they do not only mean strict "parallel" and "orthogonal", but also include "parallel" and "orthogonal", and then in The states of "approximately parallel" and "approximately orthogonal" within the range where the function can be performed.

Explanation of reference signs

1...construction hoist, 2...guide rail, 3...mechanical room unit, 4...car, 5...supporting parts, 6...crane, 6a...hoisting rope, 10...box, 11...tractor, 13...rope, 15...fixing mechanism, 16...guide, 20...emergency stop device, 21...speed detection device, 22...lifting rod, 25...movable Supporting part, 31...supporting seat, 31a...supporting part, 32...frame, 33...rotating body, 34, 35...pendulum, 36...actuating mechanism, 41, 42...rotating shaft, 44... ...connecting member, 51...hook member, 51a...locking part, 51b...other end, 52...operating arm, 53...hook rotating shaft, 54...urging member, 55...rotating shaft , 56...locking pin, 57...joining part, 71...casing, 72...brake, 73...roller, 74...guide member, 74a...inclined surface, 80...guide part, 82...Rotary support part, 84A, 84B, 84C...Guide roller, 85...Synchronous shaft, 200...Building, 201...Elevating passage, 201a...Wall surface, 202, 202A, 202B...Support recessed part, S1... gap.

Claims (5)

1. A construction elevator, comprising:

a guide rail arranged in the lifting path of the building in a neutral manner;

a machine room unit having a case body supported by the guide rail in a liftable manner and carrying a hoisting machine;

a car which is supported by the guide rail in a liftable manner and is connected with a rope wound around the traction machine; and

a crane for lifting and lowering the machine room unit,

the machine room unit has:

an emergency stop device provided in the case for stopping the lifting movement of the machine room unit; and

a speed detecting device provided in the case, for operating the emergency stop device when the lifting speed of the machine room unit is equal to or higher than a predetermined speed,

the emergency stop device is provided with a braking piece which is opposite to the guide rail with a gap in a normal state that the emergency stop device is not operated and is contacted with the guide rail when the emergency stop device is operated,

the speed detection device includes:

a rotating body that rotates in accordance with the lifting movement of the machine room unit;

a pendulum rotatably mounted to the rotating body and rotated by centrifugal force acting when the rotating body rotates; and

an actuating mechanism for actuating the emergency stop device when the pendulum rotates,

the machine room unit has:

a guide roller provided in the case and contacting the guide rail; and

and a synchronizing shaft that connects the guide roller and the rotating body, and transmits the rotational force of the guide roller to the rotating body.

2. The construction hoist according to claim 1, characterized in that:

the speed detection device is arranged at the upper part of the box body in the up-down direction,

the emergency stop device is arranged at the lower part of the box body in the up-down direction,

the machine room unit has a lift bar connected to the actuating mechanism and connected to a brake of the emergency stop device.

3. The construction hoist according to claim 1, characterized in that:

the rotating body is disposed in contact with the guide rail.

4. The construction hoist according to claim 1, characterized in that:

a pair of the braking members are provided with the guide rail sandwiched therebetween,

the emergency stop device has a guide portion that movably supports a pair of the brake members,

the braking member is formed in a wedge shape.

5. The construction hoist according to claim 1, characterized in that:

the machine room unit has a fixing mechanism that supports the case in the elevation path.

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