JP7340025B2 - construction elevator - Google Patents

Description

The present invention relates to a construction elevator.

In recent years, construction elevators have been proposed as elevators for transporting materials and workers when constructing building structures. In this construction elevator, a machine room unit having a hoist, a control panel, and the like is raised according to the progress of the construction of the building structure, thereby expanding the range in which the car moves up and down.

In addition, construction elevators are provided with a safety device as a safety device that stops the up-and-down movement of the machine room unit in an emergency in order to prevent the machine room unit from falling (see, for example, Patent Document 1). .

WO2012/072860

However, in the technique disclosed in Patent Document 1, the brake of the safety device that clamps the guide rail to stop the vertical movement of the machine room unit is always in contact with the guide rail. Therefore, when the machine room unit is moved up and down, there is a risk that the brake will rub against the guide rail and the guide rail will be damaged.

Furthermore, when installing the machine room unit at a predetermined position in the hoistway, the machine room unit is once raised above the predetermined position, and then lowered to the predetermined position. . Therefore, in the technique disclosed in Patent Document 1, when the machine room unit is lowered, the safety device is activated. was there. As a result, with the technique disclosed in Patent Document 1, the work of moving up and down the machine room unit and installing it at a predetermined position is very complicated.

In consideration of the above problems, it is an object of the present invention to provide a construction elevator in which a machine room unit can be easily installed without damaging the guide rails.

In order to solve the above problems and achieve the object, a construction elevator includes a guide rail erected on a hoistway of a building structure, a machine room unit, a car, and a crane.
The machine room unit has a frame on which the hoist is mounted and which is vertically supported by the guide rails. The car is supported by the guide rails so as to be able to move up and down, and is connected to a rope wound around the hoist. The lifting machine moves the machine room unit up and down.
The machine room unit includes an emergency stop device that is provided on the frame to stop the up/down movement of the machine room unit, and an emergency stop device that is provided on the frame and stops the machine room unit when the up/down speed of the machine room unit reaches a predetermined speed or higher. a speed sensing device for actuating the device. The safety device has a brake that faces the guide rail with a gap in a normal state in which the safety device is not in operation, and contacts the guide rail when in operation.

According to the construction elevator having the above configuration, the installation work of the machine room unit can be easily performed without damaging the guide rail.

1 is a schematic configuration diagram showing a construction elevator according to a first embodiment; FIG. 1 is a front view showing a speed detection device for a construction elevator according to a first embodiment; FIG. 1 is a schematic configuration diagram showing a safety device for a construction elevator according to a first embodiment; FIG. FIG. 5 is an explanatory diagram showing the installation operation of the machine room unit of the construction elevator according to the first embodiment; FIG. 5 is an explanatory diagram showing the installation operation of the machine room unit of the construction elevator according to the first embodiment; FIG. 5 is an explanatory diagram showing the installation operation of the machine room unit of the construction elevator according to the first embodiment; FIG. 4 is a front view showing a state in which the speed detection device for the construction elevator according to the first embodiment is activated; FIG. 2 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; FIG. 7 is a schematic configuration diagram showing a speed detection device and a guide section of a construction elevator according to a second embodiment;

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

1. First embodiment example 1-1. Configuration Example of Construction Elevator First, the configuration of a construction elevator according to a first embodiment (hereinafter referred to as "this example") will be described with reference to FIG.
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 for transporting materials and workers when constructing a building structure. As shown in FIG. 1, a construction elevator 1 includes a guide rail 2 erected along a hoistway 201 of a building structure 200, a machine room unit 3, a car 4 for carrying workers and materials, A supporting member 5 and a lifting machine 6 for lifting the machine room unit 3 are provided. The car 4 and the machine room unit 3 move up and down along the guide rails 2 . Hereinafter, the direction in which the car 4 and the machine room unit 3 move up and down will be referred to as the vertical direction. A support recess 202 is formed in the wall surface 201 a of the hoistway 201 to support the support member 5 and the machine room unit 3 .

The machine room unit 3 has a frame 10 , a hoist 11 , a fixing mechanism 15 , a guide portion 16 , a safety device 20 and a speed detection device 21 . In the frame 10, a hoisting machine 11 and a driving device such as a control panel (not shown) for controlling the drive of the hoisting machine 11 are placed to move the car 4 up and down.

A guide portion 16 is provided on the frame 10 . The guide portion 16 is a slider slidably engaged with the guide rail 2 . The frame 10 is supported by the guide rail 2 via the guide portion 16 so as to be able to move up and down.

A fixing mechanism 15 and two safety devices 20 , 20 are arranged below the frame 10 in the vertical direction. A speed detection device 21 is arranged above the frame 10 in the vertical direction. The speed detection device 21 detects the lifting speed of the frame 10, and activates the safety device 20 via the lifting rod 22 when the lowering speed of the frame 10 reaches a predetermined speed.

The two safety devices 20 , 20 are arranged at positions facing the guide rail 2 in the lower part of the frame 10 . Also, the two safety devices 20, 20 are connected via a link member (not shown). The two safety devices 20, 20 are interlocked and operated by a link member (not shown). The emergency stop device 20 clamps the guide rail 2 and stops the vertical movement of the frame body 10 in an emergency when it is activated. The detailed configurations of the safety device 20 and the speed detection device 21 will be described later.

The fixing mechanism 15 is configured to extend and contract from the frame 10 toward the wall surface 201 a of the hoistway 201 . The fixing mechanism 15 is inserted into a support recess 202 formed in the hoistway 201 . The fixing mechanism 15 supports the machine room unit 3 at a predetermined position in the hoistway 201 . In addition, the fixing mechanism 15 is not limited to the one described above, and various other types such as an engaging member that engages with the guide rail 2 or the wall surface 201a of the hoistway 201, a fastening member that is fastened and fixed to the wall surface 201a, and the like can be used. A locking mechanism may be applied.

The hoist 11 is installed on the frame 10 . A rope 13 is wound around the sheave of the hoisting machine 11 , and both ends of the rope 13 hang downward from the frame 10 in the vertical direction. One end of the rope 13 is connected to the car 4 , and the other end of the rope 13 is connected to a counterweight (not shown).

The car 4 is arranged below the machine room unit 3 in the vertical direction. The car 4 is provided with a car-side guide portion 26 that slidably engages with the guide rail 2 . By driving the hoisting machine 11 , the car 4 moves up and down along the guide rail 2 via the car-side guide portion 26 .

A support member 5 is arranged above the machine room unit 3 in the vertical direction. The support member 5 supports the machine room unit 3 via the lifting machine 6 . A movable support portion 25 is provided at both ends of the support member 5 . The movable support portion 25 is configured to be extendable. The support member 5 is transported to a predetermined position on the hoistway 201 by a crane or an operator. The support member 5 is installed in the hoistway 201 by inserting the movable support portion 25 into the support recess 202 .

The configuration for installing the support member 5 in the hoistway 201 is not limited to the example described above. Similar to the fixing mechanism 15 of the machine room unit 3, the support member 5 includes an engaging member that engages with the guide rail 2 and the wall surface 201a of the hoistway 201, a fastening member that is fastened and fixed to the wall surface 201a, and other various configurations. may apply.

The lifting machine 6 is installed above the frame 10 of the machine room unit 3 in the vertical direction. A lifting rope 6 a of the lifting machine 6 is connected to the support member 5 . When the lifting machine 6 is driven, the frame 10 of the machine room unit 3 moves up and down along the guide rails 2 . In this example, an example in which the lifting machine 6 is provided in the machine room unit 3 and the lifting rope 6a is connected to the support member 5 has been described, but the present invention is not limited to this. For example, the lifting machine 6 may be installed on the support member 5 and the lifting rope 6 a may be connected to the frame 10 of the machine room unit 3 .

1-2. Configuration Example of Speed Detecting Device Next, the configuration of the speed detecting device 21 will be described with reference to FIG.
FIG. 2 is a front view showing the speed detection device 21. FIG.

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

The frame 32 is placed on the support base 31 and fixed to the support base 31 via a fixing member (not shown). A rotating shaft 41 is provided on the frame 32 . A rotating body 33 is rotatably supported on the rotating 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 frame 10 moves up and down, the rotating body 33 rotates around the rotating shaft 41 .

Rotating the rotating body 33 in direct contact with the guide rail 2 eliminates the need for parts for rotating the rotating body 33, thereby reducing the number of parts.

Two pendulum shafts 42 and 43 are fixed to the rotor 33 . The first pendulum shaft 42 and the second pendulum shaft 43 are arranged at positions facing each other with the rotation shaft 41 interposed therebetween.

A first pendulum 34 is rotatably supported on the first pendulum shaft 42 . A second pendulum 35 is rotatably supported on the second pendulum shaft 43 . The first pendulum 34 and the second pendulum 35 are formed in a substantially arc shape. The pendulum shafts 42 and 43 pass through the pendulums 34 and 35 at positions deviated from their centers of gravity.

The first pendulum 34 has one end 34a bordering on the first pendulum shaft 42 and the other end 34b. The one end portion 34a is set heavier than the other end portion 34b. The second pendulum 35 has one end 35a bordering on the second pendulum shaft 43 and the other end 35b. One end portion 35a is set to be heavier than the other end portion 35b.

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

One end of a balance spring 45 is fixed to the other end 35 b of the second pendulum 35 . The other end of the balance spring 45 is fixed to the rotor 33 . The balance spring 45 generates resistance against the displacement of the other end 34b of the second pendulum 35 in the direction approaching the rotating shaft 41 . That is, when the centrifugal force acting on the pendulums 34 and 35 exceeds the resistance force of the balance spring 45, the balance spring 45 is elastically deformed (compressed) and the pendulums 34 and 35 rotate about the pendulum shafts 42 and 43. do.

The actuation mechanism 36 has a hook member 51 , an actuation arm 52 and a biasing member 54 . The hook member 51 is rotatably supported by a hook rotating shaft 53 provided on the frame 32 . At one end of the hook member 51, a locking portion 51a is formed. The other end 51b of the hook member 51 is inserted radially inward of the rotor. When the pendulums 34 and 35 rotate about the pendulum shafts 42 and 43 due to the centrifugal force and the one ends 34a and 35a of the pendulums 34 and 35 are displaced radially outward of the rotating body 33, the pendulums 34 and 35 The one ends 34 a and 35 a of the hook member 51 abut on the other end 51 b of the hook member 51 .

One end of the operating 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 longitudinal end of the operating arm 52 is connected to the lifting rod 22 by a connecting portion 57 . In addition, a locking pin 56 is provided at an intermediate portion of the operating arm 52 in the longitudinal direction. The locking portion 51 a of the hook member 51 is releasably locked to the locking pin 56 . When the locking portion 51a is locked to the locking pin 56, the rotational movement of the operating arm 52 is restricted.

A biasing member 54 is interposed between the support base 31 and the operating arm 52 in a compressed state. The urging member 54 urges the other end of the operating arm 52 to rotate upward in the vertical direction. A compression coil spring, for example, is applied as the biasing member 54 . The biasing member 54 is not limited to the compression coil spring, and may be rubber, leaf spring, or any other elastic member.

When the engagement between the locking pin 56 and the locking portion 51a is released, the actuating arm 52 is urged upward in the vertical direction by the urging member 54 . Then, the operating arm 52 rotates about the rotating shaft 55, and the other end of the operating arm 52 faces upward in the vertical direction. As a result, the lifting rod 22 connected to the operating arm 52 via the connecting portion 57 is pulled upward in the vertical direction.

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

1-3. Configuration Example of Safety Device Next, the configuration of the safety device 20 will be described with reference to FIG.
FIG. 3 is a schematic configuration diagram showing the safety device 20. As shown in FIG.

As shown in FIG. 3 , the safety device 20 has a housing 71 , a pair of brakes 72 , 72 , a pair of rollers 73 , and a pair of guide members 74 , 74 . A pair of brakes 72 , 72 , a pair of rollers 73 and a pair of guide members 74 are arranged in the housing 71 . The pair of guide members 74, 74 are supported by the housing 71 and arranged at positions facing each other with the guide rail 2 interposed therebetween. The gap between the pair of guide members 74 , 74 is kept constant by the housing 71 .

The guide member 74 is formed with an inclined surface portion 74a. The inclined surface portions 74a are formed on surfaces of the pair of guide members 74 that face 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 interval between the inclined surface portions 74a of the pair of guide members 74, 74 narrows upward in the vertical direction.

A roller 73 is arranged on the inclined surface portion 74a. The roller 73 guides the pair of brakes 72, 72 so as to be movable in the vertical direction. The pair of brake pads 72, 72 are supported by a holding member (not shown) so as to move toward and away from each other. Moreover, the brake shoe 72 is formed in a wedge shape.

A pair of brakes 72 , 72 are arranged between the guide rail 2 , the roller 73 and the guide member 74 . In the normal state shown in FIG. 3 in which the safety device 20 is not in operation, the pair of brake elements 72 are arranged below the guide member 74 in the vertical direction due to their own weight. At this time, the brake shoe 72 is arranged with a gap S1 between it and the guide rail 2 .

Also, the pair of brakes 72, 72 are connected to the lifting rod 22 (see FIGS. 2 and 3). Then, when the lifting rod 22 is lifted upward in the vertical direction, the pair of brakes 72 , 72 moves upward in the vertical direction along the roller 73 together with the lifting rod 22 .

Although an example in which the brake shoe 72 is formed in a wedge shape has been described, the present invention is not limited to this, and the brake shoe 72 may be formed in a spherical shape. It should be noted that the shape of the brake shoe 72 is preferably wedge-shaped rather than spherical in order to increase the contact area with the guide rail 2 during operation. Also, a biasing member may be provided to hold the pair of guide members 74, 74 at a constant interval, and the configuration of the safety device 20 is not limited to that described above.

1-4. Installation operation example of the machine room unit An example of installation at the position of will be described with reference to FIGS. 4 to 6. FIG.
4 to 6 are explanatory diagrams showing the installation operation of the machine room unit 3. FIG.

First, as shown in FIG. 4 , the machine room unit 3 is lifted by the lifting machine 6 . As a result, the load applied to the fixing mechanism 15 is eliminated. Then, the fixing mechanism 15 is contracted and extracted from the support recess 202A.

Next, the machine room unit 3 is lifted to a predetermined position by the lifting machine 6 . At this time, the pair of brake elements 72, 72 of the safety device 20 are not in contact with the guide rail 2, as shown in FIG. As a result, when the machine room unit 3 moves up and down, it is possible to prevent the brake shoe 72 from rubbing against the guide rail 2 and damaging the guide rail 2 .

Further, as the machine room unit 3 moves upward, the rotor 33 (see FIG. 2) of the speed detection device 21 rotates. The machine room unit 3 rises at a speed at which the centrifugal force acting on the pendulums 34 and 35 does not exceed the resistance force of the counterbalance spring 45 . Therefore, the operating mechanism 36 of the speed detection device 21 does not operate the safety device 20 .

Next, as shown in FIG. 5, when the fixing mechanism 15 raises the frame 10 of the machine room unit 3 to a position facing the support recess 202B arranged above the support recess 202A, the driving of the crane 6 is stopped. Let As a result, the upward movement of the machine room unit 3 is stopped. At this time, the machine room unit 3 is lifted 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 to insert the fixing mechanism 15 into the support recess 202B.

As shown in FIG. 6, when the fixing mechanism 15 is inserted into the support recess 202B, the lifting machine 6 is driven to lower the machine room unit 3. As shown in FIG. As a result, the fixing mechanism 15 is placed in the support recess 202B, and the fixing mechanism 15 supports the frame 10 of the machine room unit 3 at an arbitrary position. 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 machine room unit 3 is moved downward, the lowering speed of the machine room unit 3 is such that the centrifugal force acting on the pendulums 34 and 35 does not exceed the resistance force of the counterbalance spring 45. The children 72 , 72 are not in contact with the guide rail 2 . Therefore, when the machine room unit 3 moves downward, the safety device 20 does not operate unintentionally.

As a result, the fixing mechanism 15 can be smoothly mounted on the support recess 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 the restoration work of the safety device 20 .

Further, in a general elevator, a speed governor for detecting the speed of the car is installed above the hoistway, and a speed governor rope connected to the car is wound around the pulley of the speed governor. On the other hand, in the construction elevator 1 of this example, the speed detector 21 for detecting the speed of the machine room unit 3 is installed on the frame 10 that moves up and down. As a result, speed control ropes, pulleys, etc. are not required, and the number of parts can be reduced. Furthermore, since there is no control rope, even if the machine room unit 3 moves up and down and its position in the hoistway 201 changes, there is no need to adjust the length or tension of the control rope. Installation work of the machine room unit 3 can be easily performed.

1-5. Operation of Speed Detecting Device and Safety Device Next, an operation example of the speed detecting device 21 and the safety device having the configurations described above will be described with reference to FIGS. 7 and 8. FIG.
FIG. 7 is a diagram showing a state in which the speed detection device 21 is activated, and FIG. 8 is a diagram showing a state in which the safety device 20 is activated.

When the lowering speed (lifting speed) of the machine room unit 3 reaches a predetermined speed or higher due to an abnormality in the lifting machine 6 or a break in the lifting rope 6a, the rotation speed of the rotating body 33 of the speed detecting device 21 increases. . Then, the pendulums 34 and 35 rotate about the pendulum shafts 42 and 43 due to the centrifugal force, and the one ends 34a and 35a of the pendulums 34 and 35 move against the resistance of the balance spring 45 to move the rotating body 33. Displaced radially outward. Therefore, as shown in FIG. 7, one ends 34a and 35a of the pendulums 34 and 35 abut against the other end 51b of the hook member 51. As shown in FIG.

Then, the hook member 51 rotates about the hook rotating shaft 53, and the locking between the locking pin 56 and the locking portion 51a is released. As a result, the operating arm 52 rotates around the rotating shaft 55 by the biasing force of the biasing member 54, and the other end of the operating arm 52 faces upward in the vertical direction. As a result, the lifting rod 22 connected to the operating arm 52 via the connecting portion 57 is pulled upward in the vertical direction.

By pulling up the lifting rod 22 upward in the vertical direction, as shown in FIG. Moving. Further, the pair of brake elements 72 , 72 moves upward in the vertical direction, thereby moving in a direction approaching the guide rail 2 and coming into contact with the guide rail 2 . As a result, the pair of brakes 72, 72 sandwich the guide rail 2, and the downward movement of the machine room unit 3 is mechanically stopped. As a result, the machine room unit 3 can be prevented from falling, and the safety of the construction elevator 1 can be enhanced.

2. Second Embodiment Next, a construction elevator according to a second embodiment will be described with reference to FIG.
FIG. 9 is a plan view showing a guide section and a speed detection device of a construction elevator according to a second embodiment.

The elevator for construction work according to the second embodiment differs from the elevator for construction work 1 according to the first embodiment in that the construction of the guide section and the rotating body 33 of the speed detection device 21 are rotated. Configuration. Therefore, here, the parts common to the construction elevator 1 according to the first embodiment are denoted by the same reference numerals, and overlapping explanations are omitted.

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

The second guide roller 84B and the third guide roller 84C are arranged to face each other with the guide rail 2 interposed therebetween. Also, the first guide roller 84A is arranged to face the guide rail 2 between the second guide roller 84B and the third guide roller 84C. The three guide rollers 84A, 84B, 84C are in contact with the guide rail 2. As the frame 10 of the machine room unit 3 moves up and down, the three guide rollers 84A, 84B and 84C rotate.

Also, the first guide roller 84A and the rotating body 33 of the speed detecting device 21 are connected by a synchronizing shaft 85. As shown in FIG. The rotational force of the first guide roller 84A is transmitted to the rotating body 33 of the speed detecting device 21 by the synchronizing shaft 85. As shown in FIG. Therefore, when the frame 10 moves up and down and the first guide roller 84A rotates, the rotating body 33 of the speed detecting device 21 also rotates. Thereby, the vertical speed of the frame 10 can be detected.

Also in the construction elevator according to the second embodiment, when the lowering speed (lifting speed) of the machine room unit 3 reaches a predetermined speed or higher, the rotation speed of the rotating body 33 of the speed detecting device 21 increases. , the operating mechanism 36 (see FIG. 7) of the speed detecting device 21 is operated. As a result, the actuating arm 52 of the speed detecting device 21 pulls the lifting rod 22 upward in the vertical direction, and the safety device 20 is actuated.

Since other configurations are the same as those of the construction elevator 1 according to the first embodiment, description thereof will be omitted. With the elevator for construction work having such a configuration, it is possible to obtain the same effects as those of the elevator for construction work 1 according to the first embodiment described above.

Further, in the construction elevator according to the second embodiment, the synchronous shaft 85 may be provided with an adjusting mechanism for adjusting the number of revolutions.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the gist of the invention described in the claims.

In this specification, words such as "parallel" and "perpendicular" are used, but these do not strictly mean only "parallel" and "perpendicular", but include "parallel" and "perpendicular". Furthermore, it may be in a "substantially parallel" or "substantially orthogonal" state within the range where the function can be exhibited.

DESCRIPTION OF SYMBOLS 1... Construction elevator 2... Guide rail 3... Machine room unit 4... Car 5... Support member 6... Lifting machine 6a... Lifting rope 10... Frame body 11... Hoisting machine 13 Rope 15 Fixing mechanism 16 Guide part 20 Safety device 21 Speed detection device 22 Lifting bar 25 Movable support part 31 Support base 31a Support 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 part 52... Actuating arm, 53 Hook rotation shaft 54 Biasing member 55 Rotation shaft 56 Engagement pin 57 Connecting portion 71 Case 72 Braking element 73 Roller 74 Guide member 74a Inclined surface portion 80 Guide portion 82 Rotational support portion 84A, 84B, 84C Guide roller 85 Synchronous shaft 200 Building structure 201 Hoistway 201a Wall surface 202, 202A, 202B Support recess, S1...Gap

Claims (4)

A guide rail erected on the hoistway of the building structure,
a machine room unit having a frame on which a hoist is mounted and which is movably supported by the guide rail;
A car supported by the guide rail so as to be able to ascend and descend and connected to a rope wound around the hoist,
a lifting machine that moves the machine room unit up and down,
The machine room unit is
a safety device that is provided on the frame and stops the vertical movement of the machine room unit;
a speed detection device that is provided on the frame and that operates the safety device when the lifting speed of the machine room unit reaches a predetermined speed or higher;
The safety device has a brake that faces the guide rail with a gap in a normal state in which the safety device is not in operation and contacts the guide rail when in operation,
The speed detection device is
a rotating body that rotates as the machine room unit moves up and down;
a pendulum rotatably attached to the rotating body and rotated by a centrifugal force acting when the rotating body rotates;
an operating mechanism that operates the safety device when the pendulum rotates,
The machine room unit is
a guide roller provided on the frame and in contact with the guide rail;
a synchronous shaft that connects the guide roller and the rotating body and transmits the rotational force of the guide roller to the rotating body;
construction elevator. The speed detection device is provided above the frame in the vertical direction,
The safety device is provided below the frame in the vertical direction,
2. The construction elevator according to claim 1 , wherein the machine room unit has a lifting rod coupled to the actuating mechanism and connected to the brake of the safety device. The brake shoe is provided as a pair with the guide rail interposed therebetween,
The safety device has a guide portion that movably supports the pair of brake pads,
The elevator for construction according to claim 1, wherein the brake is formed in a wedge shape. The construction elevator according to claim 1, wherein the machine room unit has a fixing mechanism that supports the frame on the hoistway.

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