JP6813041B2 - Double deck elevator - Google Patents

Description

The present invention relates to a double deck elevator, and more particularly to a double deck elevator in which an upper car and a lower car are provided in an outer car.

The double-deck elevator, which has a two-story structure with an upper car and a lower car installed in the outer car that goes up and down in the hoistway, is superior in transportation capacity compared to an elevator consisting of a single car. .. In addition, less installation space is required to obtain the same transportation capacity. For this reason, it is being introduced into large-scale high-rise buildings.

The outer car is connected to a counterweight by a main rope, and the main rope is hung on a sheave of a hoisting machine installed in a machine room at the upper part of the hoistway. Then, by driving the hoisting machine motor constituting the hoisting machine and rotating the rope wheel, the outer car is raised and lowered to the target position corresponding to each destination floor of the upper and lower car, and the upper car is raised and lowered. The basket and the lower basket are landed on different floors.

By the way, depending on the building, the floor height may be uneven. For example, the first floor is an entrance hall with a high ceiling, and the second floor and above are office floors with a lower ceiling than the first floor.

In a double-deck elevator installed in a building with uneven floor heights like this, it is necessary to adjust the distance between the upper car and the lower car according to the floor heights of the two floors that land at the same time. As a double deck elevator that enables this adjustment, the upper car was hung on one end side of a wire rope, which is a type of cord-like body that was hung on a drive sheave and folded back, and the lower car was hung on the other end side. Those having a structure are known (Patent Document 1).

According to this configuration, if the drive sheave is rotated in the first direction and the lower car is pulled up and raised, the upper car is lowered and the distance between the cars can be shortened, so that the drive sheave is in the first direction. If the car is rotated in the opposite second direction and the upper car is pulled up and raised, the lower car is lowered and the car interval can be lengthened, so that the car interval can be adjusted. As a result, the distance between the cars can be adjusted according to the destination floor.

In the double deck elevator configured as described above, the upper car and lower car are only suspended by wire ropes in the outer car, so if the ascending outer car suddenly stops, the upper car and lower car There is a situation where both of them jump up in the outside car.

For example, when the hoisting machine goes out of control and the counterweight plunges into a shock absorber installed at the bottom of the hoistway. In this case, the upper car and the lower car, which are rising together with the outer car, jump up due to the inertia even after the outer car suddenly stops, and in some cases, the wire rope may come off from the drive sheave. ..

In order to prevent the upper car and the outer car from jumping up, the double deck elevator described in Patent Document 1 moves up and down in the outer car 1 in order to adjust the car spacing, as shown in FIG. The upper car 4 and the lower car 5 are provided with upward emergency stops 9, 10 and upward emergency stops 11 and 12, which are composed of a clamping mechanism for sandwiching the rails 17 and 18 for guiding the lower car 5 and the upper car 5, respectively (Patent Document 1). Paragraphs [0031] to [0037]).

Then, when the counter weight 13 is expected to plunge into the shock absorber 14 installed at the bottom of the hoistway, the control panel 16 for an upward emergency stop device installed in the machine room (paragraph [0027] of Patent Document 1) is used. An operation command signal is sent to the upward emergency stop 9 to 12 to perform an emergency stop operation (Claims 1-3, Claims 8-10, paragraphs [0039]-[] of Patent Document 1. 0040]). Further, in Patent Document 1, "Furthermore, while the outer frame car 1 is rising, the distance between the upper car 4 and the lower car 5 is not changed, and during that time, the upward emergency stops 9 to 12 are the rails 17, 18 may be sandwiched between them. By doing so, the urgent control of detecting or predicting an emergency stop and operating the upward emergency stops 9 to 12 becomes unnecessary. (Paragraph [0064]).

Japanese Unexamined Patent Publication No. 2013-35620 (Patent No. 5462843)

However, since the above "forecast" in Patent Document 1 is just an estimate, if the counterweight 13 does not actually thrust into the shock absorber 14 installed at the bottom of the hoistway, the upward emergency stops 9 to 12 will operate. It will be wasted. Further, assuming that the upward emergency stops 9 to 12 may always sandwich the rails 17 and 18 while the outer frame car 1 is rising, the outer car arrives at the target floor for adjusting the car interval. Since it is done after the car door is opened and closed, the opening and closing of the car door will be delayed by that amount, resulting in a decrease in service to passengers.
In view of the above problems, the present invention suppresses the jumping of the upper car and the lower car only when it is actually necessary as much as possible, and unnecessarily brakes the vertical movement of the upper car and the lower car. The purpose is to provide no double deck elevator.

In order to achieve the above object, the double deck elevator according to the present invention has an upper car and a lower car inside the outer car that goes up and down in the hoistway, and the floor adjustment winding installed in the outer car. For inter-floor adjustment in a double deck elevator having a configuration in which the upper car is hung on one end side of a cord-like body that is hung on the drive sheave of the upper machine and folded back, and the lower car is hung on the other end side. With respect to the holding means for holding the hoisting machine so that it can be displaced upward with respect to the outer car from a fixed position for adjusting the distance between the upper car and the lower car by rotationally driving the drive sheave, and the outer car. An elastic member that urges the inter-floor adjustment hoisting machine upward by a restoring force, a rail fixed to the outer car and provided in the vertical direction, and a rail installed in the upper car to grip the rail. An upper car braking device that can switch between a gripping state that brakes the relative displacement of the upper car in the vertical direction with respect to the outer car and an open state in which the grip is released, and an upper car braking device that is installed in the lower car and grips the rail. As a result, the lower car braking device that can switch between the gripping state that brakes the relative displacement of the lower car in the vertical direction with respect to the outer car and the open state in which the grip is released, and the inter-floor adjustment hoisting machine are outside the car. When the detection switch that detects the relative displacement of the car from the fixed position upward and the detection switch detects the relative displacement of the inter-floor adjustment hoisting machine, the upper car braking device and the car. A control device for switching and controlling the lower car braking device from the open state to the gripping state is provided, and the elastic member is attached to the inter-floor adjusting hoisting machine via the cord-like body together with the upper car. When the weight of the lower car is applied, it is deformed and the hoisting machine for inter-floor adjustment is housed in a fixed position, and when the weight of the upper car and the lower car is not applied, the inter-floor adjustment hoisting machine is used. It is characterized by having a restoring force having a magnitude that causes the hoisting machine to be displaced upward from the fixed position.

Further, the inter-floor adjustment hoisting machine is characterized in that it is installed in the outer car via a vibration isolator.

Further, the elastic member is a compression spring, and is characterized in that it is provided in parallel with the anti-vibration member between the outer cage and the inter-floor adjustment hoisting machine.

According to the double deck elevator according to the present invention having the above configuration, for example, the tension of the cord-like body applied to the inter-floor adjustment hoisting machine due to the sudden stop of the outer car for some reason. When the weight of the upper and lower baskets is almost not applied to the floor adjustment hoist, the restoring force of the elastic member causes the floor adjustment hoist to move from the above fixed position to the outside car. It is relatively displaced upward. Then, the relative displacement is detected by the detection switch, and the upper car braking device and the lower car braking device are switched from the open state to the gripping state. As a result, the relative displacement of the upper car and the lower car with respect to the outer car in the vertical direction is braked.
Moreover, for example, since the braking is performed only when the outer car is suddenly stopped for some reason, the vertical movement of the upper car and the lower car is not unnecessarily braked.

It is a figure which shows the schematic structure of the whole double deck elevator which concerns on embodiment. It is an enlarged view which shows the outer car of the double deck elevator and the equipment and devices installed in the outer car. (A) is a diagram showing an inter-floor adjustment hoist installed in the outer car and its installation mode, and (b) is a partial cross-sectional view obtained by cutting a part of the diagram shown in (a). is there. (A) is a diagram showing a state in which the inter-floor adjustment hoisting machine is displaced upward from the position (fixed position) shown in FIG. 3 (a) with respect to the outer car, and FIG. It is a partial cross-sectional view which cut a part of the figure shown in a). It is a block diagram which showed the relationship of the control / communication system of various devices, etc. centering on a main control device and a sub control device in the said double deck elevator.

Hereinafter, embodiments of the double deck elevator according to the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of the entire double deck elevator 10 according to the embodiment.

As shown in FIG. 1, the double deck elevator 10 is a rope type elevator that employs a traction system as a drive system. A machine room 14 is provided in a building portion above the uppermost part of the hoistway 12. In the machine room 14, a hoisting machine having a sheave 16 and a deflecting wheel 18 are installed.

A main rope 20 is hung on the sheave 16 and the deflecting wheel 18 in a so-called double wrap type. Both ends of the main rope 20 are fixed to the upper part of the hoistway 12. An outer car 24 is suspended between one end of the main rope 20 and the hoisting machine via a suspension wheel 22, and a counter is suspended between the other end of the main rope 20 and the hoisting machine via a suspension wheel 26. The weight 28 is suspended.

In the above configuration, when the sheave 16 is rotated forward or reversed by a hoisting machine motor (not shown), the main rope 20 wound around the sheave 16 runs, and the outer car suspended by the main rope 20 travels. The 24 and the counterweight 28 move up and down in opposite directions.

A main control device 30 is also installed in the machine room 14. The main control device 30 comprehensively controls the hoisting machine and the like to realize normal operation by a smooth ascending / descending operation of the outer car 24 and the like. The bottom (pit) of the hoistway 14 has a counterweight shock absorber 32 in case the outer car 24 rises too much beyond the top floor or the outer car 24 falls for some reason. An outer car shock absorber 34 is installed.

FIG. 2 is an enlarged view showing the outer car 24 and the devices and devices installed in the outer car 24. As shown in FIG. 2, the outer car 24 includes an upper beam 36A, a lower beam 36B, and two vertical frames 36C and 36D connecting the upper beam 36A and the lower beam 36B in the vertical direction (up and down) in the front view. It has an outer cage frame 36 with a long rectangular shape (in the direction).

A pedestal 38 is fixed to the upper beam 36A. A hoisting machine 40 for adjusting floors is mounted on the pedestal 38. That is, the floor adjusting hoisting machine 40 is installed on the upper beam 36A via the pedestal 38. The inter-floor adjustment hoisting machine 40 has a drive sheave 42 that is driven in the forward rotation and the reverse rotation by the electric motor 41 (FIG. 5). The details of the installation mode of the inter-floor adjustment hoisting machine 40 will be described later.

Inside the outer car 24 (outer car frame 36), an upper car 43 and a lower car 45 are provided side by side in the vertical direction. A pair of suspension wheels 48A and 48B are provided above the upper car body 44 of the upper car 43, and a pair of suspension wheels 50A and 50B are provided below the lower car body 46 of the lower car 45, respectively.

A pair of guide rails 52A and 52B are provided in the vertical direction between the upper beam 36A and the lower beam 36B. The upper car body 44 and the lower car body 46 are provided with a pair of guide shoes (not shown) corresponding to the pair of guide rails 52A and 52B, respectively, and the upper car body 44 and the lower car body 46 are provided with the guide shoes. Guides the guide rails 52A and 52B in the vertical direction.

A wire rope 54 is hung on the drive sheave 42, and one end 54A and the other end 54B of the wire rope 54 hung on the drive sheave 42 and folded back are both connected to the upper beam 36A. The upper car body 44 is suspended from the wire rope 54 portion between one end 54A and the drive sheave 42 via the suspension wheels 48A and 48B, and the wire rope 54 portion between the other end 54B and the drive sheave 42. The lower car body 46 is suspended from the vehicle via the suspension wheels 50A and 50B.

That is, in the double deck elevator 10 (FIG. 1), the upper car 43 is placed on the upper car 43 at one end 54A side of the wire rope 54 that is hung on the drive sheave 42 of the floor adjustment hoisting machine 40 installed in the outer car 24 and folded back. It has a configuration in which the lower car 45 is suspended on the other end 54B side.

In the double deck elevator 10 having the above configuration, if the drive sheave 42 is rotated in the direction of the arrow A and the upper car 43 is pulled up and raised, the lower car 45 is lowered and the car interval can be lengthened to drive the car. If the sheave 42 is rotated in the direction of arrow B opposite to arrow A and the lower car 45 is pulled up and raised, the upper car 43 is lowered and the car spacing can be shortened, so that the car spacing can be adjusted. It has become. As a result, the distance between the cars can be adjusted according to the destination floor.

The upper car 43 is provided with upper car braking devices 56A and 56B, and the lower car 45 is provided with lower car braking devices 58A and 58B, respectively.

The upper car braking device 56A grips the guide rail 52A, and the upper car braking device 56B grips the guide rail 52B to brake the relative displacement of the upper car 43 with respect to the outer car 24 (outer car frame 36) in the vertical direction. Similarly, the lower car braking device 58A grips the guide rail 52A, and the lower car braking device 58B grips the guide rail 52B to brake the relative displacement of the lower car 45 with respect to the outer car 24 (outer car frame 36) in the vertical direction. ..

In the upper car braking devices 56A and 56B and the lower car braking devices 58A and 58B, as the gripping mechanism (clamp mechanism) for gripping the guide rails 52A and 52B, for example, JP-A-2014-162575 and JP-A-2015- The mechanism described in Japanese Patent Application Laid-Open No. 131695 can be used.

The upper car braking devices 56A and 56B and the lower car braking devices 58A and 58B are configured to be switchable between a gripping state in which the corresponding guide rails 52A and 52B are gripped and an open state in which the grip is released. , It is controlled by the sub-control device 78 described later.

Next, the details of the installation mode of the inter-floor adjustment hoisting machine 40 will be described with reference to FIG.
As described above, the pedestal 38 is fixed to the upper beam 36A of the outer car frame 36. The pedestal 38 has a rectangular plate shape as a whole.

On the pedestal 38, the hoisting machine 40 for inter-floor adjustment is mounted via the vibration-proof rubber 60 which is a vibration-proof member. The anti-vibration rubber 60 has a thick sheet shape.

On the pedestal 38, four guide pins 62 and 64 (only two appear in the figure) are erected in a rectangular arrangement in a plan view. Through holes 60a and 60b having a size sufficient for the guide pins 62 and 64 to be inserted are provided at positions of the anti-vibration rubber 60 corresponding to the guide pins 62 and 64.

Through holes 66a and 66b having a diameter slightly larger than the guide pins 62 and 64 are opened at positions corresponding to the guide pins 62 and 64 on the base 66, which is a component of the inter-floor adjustment hoisting machine 40. ing. The inter-floor adjustment hoisting machine 40 is installed in the outer car 24 (outer car frame 36) with the four guide pins 62 and 64 inserted into the through holes 66a and 66b of the base 66. Therefore, the guide pins 62 and 64 function as holding means for holding the inter-floor adjustment hoisting machine 40 so as to be displaceable in the vertical direction with respect to the outer car 24.

A bottomed hole 38a is formed on the upper surface of the pedestal 38. The anti-vibration rubber 60 is provided with a through hole 60c that communicates with the bottomed hole 38a. The space formed by the bottomed hole 38a and the through hole 60c is referred to as a spring accommodating portion 68.

A compression coil spring 70, which is an elastic member, is housed in the spring storage portion 68. The compression coil spring 70 is housed in a compressed state, and the restoring force of the compression coil spring 70 urges the inter-floor adjustment hoisting machine 40 upward with respect to the outer car 24 via the pedestal 38. The magnitude of this restoring force will be described later.

Further, as can be seen from FIG. 3B, the compression coil spring 70 is not in series with the anti-vibration rubber 60 but in series between the outer car 24 and the floor adjustment hoisting machine 40, but the anti-vibration rubber 60. It is provided in parallel with.

A limit switch 74 is attached to the pedestal 38 via an attachment member 72. The limit switch 74 has a main body 74A and a lever 74B, and is configured to switch from off to on when the lever 74B is pressed by the main body 74A.

An operation bar 76 is attached to the base 66 of the inter-floor adjustment hoisting machine 40 with its base end fixed to the base 66. The operation bar 76 is attached at a position where its tip is directly below the lever 74B.

Subsequently, the magnitude of the restoring force of the compression coil spring 70 will be described. During normal operation of the double deck elevator 10, the inter-floor adjustment hoisting machine 40 is loaded with the weights of the upper car 43 and the lower car 45 via the wire rope 54. In this state, the compression coil spring 70 is pressed by the inter-floor adjustment hoisting machine 40 and compressed (deformed) until the base 66 comes into close contact with the anti-vibration rubber 60 as shown in FIG. 3 (b). doing). The weights of the upper car 43 and the lower car 45 hanging on the inter-floor adjusting hoisting machine 40 are grasped as the tension generated in the wire rope 54.

The position of the inter-floor adjustment hoisting machine 40, which is pressed by the weight of the upper car 43 and the lower car 45 during normal operation and the base 66 is in close contact with the anti-vibration rubber 60, is referred to as a "fixed position". I will do it. Further, since it is a position during normal operation, the "fixed position" can be said to be a position where the car spacing between the upper car 43 and the lower car 45 is adjusted by rotationally driving the drive sheave 42.

As described above, the compression coil spring 70 is compressed (deformed) when the weights of the upper car 43 and the lower car 45 are applied to the floor adjustment hoisting machine 40 via the wire rope 54, and the floors are compressed (deformed). The adjusting hoisting machine 40 has a restoring force that can be accommodated in a fixed position.

Here, for example, consider a case where the hoisting machine for the outer car 24 goes out of control due to some trouble and the counterweight 28 shown in FIG. 1 plunges into the counterweight shock absorber 32. In this case, the upper car 43 and the lower car 45, which are rising together with the outer car 24, jump up due to the inertia even after the outer car 24 is suddenly stopped, and the tension of the wire rope 54 is substantially lost. In other words, the weights of the upper car 43 and the lower car 45 are not applied to the inter-floor adjustment hoisting machine 40 (compression coil spring 70). Further, since the displacement of the inter-floor adjustment hoisting machine 40 with respect to the outer car 24 is not restricted in the vertical direction, the inter-floor adjusting hoisting machine 40 also moves upward due to inertia after the outer car 24 suddenly stops. Since the displacement is to be continued, the weight of the inter-floor adjustment hoisting machine 40 applied to the compression coil spring 70 is also reduced.

The reason why the weights of the upper car 43 and the lower car 45 are almost not applied to the inter-floor adjustment hoisting machine 40 (compression coil spring 70) is that the outer car 24 goes too far on the lowermost floor for some reason and is outside. The same applies when the car is pushed into the shock absorber 34. That is, when the outer car 24 is suddenly stopped by plunging into the outer car shock absorber 34, the upper car 43 and the lower car 45 that have descended together with the outer car 24 tend to continue to descend due to their inertia. The wire rope 54 is pulled and extended by the upper car 43 and the lower car 45. Then, the restoring force (springiness) of the extended wire rope 54 pulls up the upper car 43 and the lower car 45 and jumps up, so that the tension of the wire rope 54 is almost lost, that is, the winding for inter-floor adjustment. The weights of the upper car 43 and the lower car 45 are almost not applied to the upper machine 40 (compression coil spring 70).

In addition, when the outer car 24 is thrust into the outer car shock absorber 34, the weight of the inter-floor adjustment hoisting machine 40 applied to the compression coil spring 70 is also reduced. That is, when the outer car 24 is thrust into the outer car shock absorber 34 and then jumps up due to the reaction, the floor adjustment hoisting machine 40 is also pushed up by the outer car 24 and jumps up. At this time, even after the outer car 24 decelerates and jumps up (upward displacement), the inter-floor adjustment hoisting machine 40 tries to continue the upward displacement due to inertia, so that it is hooked on the compression coil spring 70. The weight of the inter-floor adjustment hoisting machine 40 is reduced.

Further, before the outer car 24 is thrust into the outer car shock absorber 34, the weights of the upper car 43 and the lower car 45 and the weight of the inter-floor adjustment hoisting machine 40 are almost not applied to the compression coil spring 70. In some cases. One of the causes that causes the outer car 24 to plunge into the outer car shock absorber 34 is the case where the main rope 20 (FIG. 1) is cut. In this case, since the upper car 43, the lower car 45, and the inter-floor adjustment hoisting machine 40 provided in the outer car 24 and the outer car 24 freely fall, the upper car 43, the lower car 45, and the lower car 45 are attached to the compression coil spring 70. The weight of the inter-floor adjustment hoisting machine 40 is almost eliminated.

As described above, when the tension of the wire rope 54 is substantially eliminated and at least the weights of the upper car 43 and the lower car 45 are not applied to the inter-floor adjustment hoisting machine 40, the compression coil spring 70 is used for the inter-floor adjustment hoisting. The upper machine 40 is pushed up and displaced upward from the fixed position. In other words, in the above state, it has a restoring force that displaces the inter-floor adjustment hoisting machine 40 upward from the fixed position.

As described above, the compression coil spring 70 is used (i) when the weights of the upper car 43 and the lower car 45 are applied to the inter-floor adjustment hoisting machine 40 via the wire rope 54, the inter-floor adjustment hoisting. The upper car 40 is compressed (deformed) until it is put in place, and (ii) the tension of the wire rope 54 is substantially lost, and at least the weight of the upper car 43 and the lower car 45 is added to the inter-floor adjustment hoisting machine 40. In the state where the rope is not applied, the hoisting machine 40 for inter-floor adjustment is pushed up and has a restoring force of a magnitude that causes it to be displaced upward from the fixed position.

As shown in FIG. 4, when the inter-floor adjustment hoisting machine 40 is displaced upward from the fixed position, the operation bar 76 attached to the hoisting machine 40 is also displaced upward, and the lever 74B of the limit switch 74 is displaced at the tip thereof. Press on the main body 74A. As a result, the limit switch 74 is switched from off to on. That is, the limit switch 74 functions as a detection switch for detecting that the inter-floor adjustment hoisting machine 40 is displaced upward from a fixed position with respect to the outer car 24.

When the limit switch 74 detects that the hoisting machine 40 for inter-floor adjustment has displaced upward from the fixed position with respect to the outer car 42, the upper car braking devices 56A and 56B and the lower car braking device An auxiliary control device 78 for switching and controlling the 58A and 58B from the open state to the gripping state is installed above the outer car frame 36 (FIGS. 1 and 2).

As shown in FIG. 5, the sub-control device 78 has a configuration in which the ROM 82 and the RAM 84 are connected to the CPU 80. For the sub-control device 78, for example, a microcomputer is used. The sub-control device 78 also communicates with the main control device 30 via a traveling cable (not shown), controls the inter-floor adjustment hoisting machine 40, and adjusts to the landing floor to match the upper car 43 and the lower car. Adjustment control of the car spacing of 45 is performed, and opening / closing control of the car doors (not shown) of the upper car 43 and the lower car 45 is performed, but these controls are not the main points of the present invention. , Omitted.

The upper car braking devices 56A and 56B, the lower car braking devices 58A and 58B, and the limit switch 74 are connected to the sub-control device 78. The sub-control device 78 maintains each of the upper car braking devices 56A and 56B and the lower car braking devices 58A and 58B in the open state during normal operation.

Then, the sub-control device 78 does not have the limit switch 74 switched from off to on, that is, the limit switch 74 causes the inter-floor adjustment hoisting machine 40 to be relatively displaced upward from the fixed position with respect to the outer car 24. For the first time when it is detected, in other words, the counter weight 28 plunges into the counter weight shock absorber 32, the outer car 24 plunges into the outer car shock absorber 34, or the outer car 24 falls freely (hereinafter, these). The upper car braking devices 56A and 56B and the lower car braking devices 58A and 58B are switched from the open state to the gripping state and controlled only when the above-mentioned situations are collectively referred to as "emergency situations".

As a result, the upward relative displacement of the upper car 43 and the lower car 45 with respect to the outer car 24 is braked, and excessive jumping is suppressed. Moreover, since the braking is performed only after an emergency occurs, the vertical movement of the upper car 43 and the lower car 45 is not unnecessarily braked.

From the viewpoint of suppressing excessive jumping, the tip of the operating bar 76 and the lever 74B can be set so that the operating bar 76 presses the lever 74B of the limit switch 74 at the initial stage of jumping of the upper car 43 and the lower car 45. It is preferable to bring them as close as possible. That is, it is preferable that the distance between the tip of the operation bar 76 and the lever 74B in the vertical direction is as short as possible.

Furthermore, the limit switch 74, which is a detection switch for detecting that the inter-floor adjustment hoisting machine 40 is displaced upward from a fixed position with respect to the outer car 24, is operated until the upper car 43 and the lower car 45 jump up completely. It is preferable to install it at a position where the relative displacement can be detected.

As described above, according to the double deck elevator 10 according to the embodiment having the above configuration, the wire hung on the inter-floor adjustment hoisting machine 40 due to the occurrence of the above-mentioned emergency situation. When the tension of the rope 54 is substantially eliminated and the weights of the upper car 43 and the lower car 45 are hardly applied to the inter-floor adjustment hoisting machine 40, the inter-floor adjustment hoisting machine 40 is caused by the restoring force of the compression coil spring 70. Is displaced upward from the home position with respect to the outer car 24. Then, the relative displacement is detected by the limit switch 74, and the upper car braking devices 56A and 56B and the lower car braking devices 58A and 58B are switched from the open state to the gripping state. As a result, the relative displacement of the upper car 43 and the lower car 45 in the vertical direction is braked.

Moreover, since the braking is performed only after an emergency occurs, the vertical movement of the upper car 43 and the lower car 45 is not unnecessarily braked.

Although the double deck elevator according to the present invention has been described above based on the embodiment, the present invention is not limited to the above-described embodiment, and for example, the following embodiment may be used.
(1) In the above embodiment, the wire rope 54 is used as a rope-like body for suspending the upper car body 44 and the lower car body 46 in the outer car 24, but the upper car body 44 and the lower car body 46 are suspended. The cord to be lowered is not limited to a wire rope, and for example, a rubber belt with a core wire such as a steel cord or a belt made of carbon fiber may be used.

(2) In the above embodiment, a compression coil spring is used as an elastic member for urging the floor adjusting hoisting machine 40 upward by a restoring force with respect to the outer car 24, but the present invention is not limited to this, and a leaf spring is used. It doesn't matter.

Further, as the elastic member, for example, a tension coil spring may be used. In this case, the pedestal 38 is provided with a stand for hooking one hook of the tension coil spring to hang it, while the base 66 is provided with a hook portion for hooking the other hook. Then, one hook is hung on the stand, and the suspended tension coil spring is extended and hooked on the hook portion. As a result, the base 66 (inter-floor adjustment hoisting machine 40) is urged upward by the restoring force that the tension coil spring tends to contract. The magnitude of the restoring force is set in the same manner as the magnitude of the restoring force of the compression coil spring 70.

(3) In the above embodiment, guide pins 62 and 64 are used as holding means for holding the inter-floor adjustment hoisting machine 40 so as to be displaceable upward with respect to the outer car 24 from a fixed position, but the present invention is limited to this. Instead, for example, all screw bolts (threaded rods) may be used.

Alternatively, a plate-shaped object may be used instead of a rod-shaped object such as a pin or a bolt. For example, an elongated "U" -shaped slit is formed in the base 66 and the anti-vibration rubber 60 in a plan view, and a guide plate inserted into the slit is erected on the pedestal 38.

(4) In the above embodiment, the limit switch 74 is switched from off to on to detect the upward relative displacement of the inter-floor adjustment hoisting machine 40 with respect to the outer car 24, but the present invention is limited to this. Instead, the relative displacement may be detected by switching the limit switch 74 from on to off.

For example, when the limit switch 74 is lowered from the position shown in FIG. 3 and the inter-floor adjustment hoisting machine 40 is in the fixed position, the lever 74B is pressed by the operation bar 76 to turn it on, and the inter-floor adjustment hoisting machine 40 is in the fixed position. When the hoisting machine 40 is displaced relative to each other, the operation bar 76 may be separated from the lever 74B and become non-contact, and the lever 74B may be mounted at a position where the lever 74B returns to the off state.

(5) In the above embodiment, the relative displacement of the inter-floor adjustment hoisting machine 40 upward is detected by the limit switch, but the present invention is not limited to this, and other types of switches may be used. As another switch, for example, a photoelectric switch having a configuration in which a light emitting element and a light receiving element are provided facing each other can be used.

For example, when the inter-floor adjustment hoisting machine 40 is in a fixed position, the photoelectric switch receives the detection light emitted from the light emitting element and is turned on, and the inter-floor adjustment hoisting is turned on. When the machine 40 is relatively displaced upward, the operation bar 76 may be installed at a position where it enters the facing region of the light emitting element and the light receiving element to block the detected light and is turned off.

(6) In the above embodiment, the operation bar 76 is attached to the inter-floor adjustment hoisting machine 40, whereby the limit switch 74 is switched between off and on, but the present invention is not limited to this, and the inter-floor adjustment hoisting is not limited to this. The limit switch 74 may be switched off and on in a part of the machine 40. For example, the lever 74 may be pressed at the upper corner of the base 66.

(7) In the above embodiment, the upper car 43 and the lower car 45 are braked by gripping the guide rails 52A and 52B with the upper car braking devices 56A and 56B and the lower car braking devices 58A and 58B. That is, the guide rails 52A and 52B that guide the vertical movement of the upper car 43 and the lower car 45 are also used for braking, but the present invention is not limited to this, and the upper car 43 and the lower car 45 are separated from the guide rails 52A and 52B. A rail dedicated to braking may be provided for braking.

(8) In the above embodiment, the rails gripped by the upper car braking devices 56A and 56B and the lower car braking devices 58A and 58B are common to the upper car 43 and the lower car 45, but the present invention is not limited to this. It may be provided separately for the upper car braking devices 56A and 56B and for the lower car braking devices 58A and 58B. That is, four braking rails may be provided.

In the double deck elevator according to the present invention, for example, the upper car is hung on one end side of the cord-like body hung on the drive sheave, and the lower car is hung on the other end side to adjust the distance between the upper car and the lower car. It can be suitably used for a double deck elevator.

10 Double deck elevator 24 Outer car 40 Floor adjustment hoist 42 Drive sheave 43 Upper car 45 Lower car 52A, 52B Guide rail 54 Wire rope 56A, 56B Upper car braking device 58A, 58B Lower car braking device 62, 64 Guide Pin 70 Compression coil spring 74 Limit switch 78 Sub-control device

Claims (3)

One end of a cord-like body that has an upper car and a lower car inside the outer car that goes up and down in the hoistway, and is hung on the drive sheave of the inter-floor adjustment hoist installed in the outer car. In a double deck elevator having a configuration in which the upper car is suspended on the side and the lower car is suspended on the other end side.
A holding means for holding the inter-floor adjustment hoisting machine so that it can be displaced upward with respect to the outer car from a fixed position for adjusting the distance between the upper car and the lower car by rotating the drive sheave.
An elastic member that urges the inter-floor adjustment hoisting machine upward by a restoring force against the outer car.
A rail fixed to the outer car and provided in the vertical direction,
An upper car braking device installed in the upper car and capable of switching between a gripping state in which the relative displacement of the upper car in the vertical direction with respect to the outer car is braked by gripping the rail and an open state in which the grip is opened. ,
A lower car braking device installed in the lower car and capable of switching between a gripping state in which the relative displacement of the lower car in the vertical direction with respect to the outer car is braked by gripping the rail and an open state in which the grip is open. ,
A detection switch that detects that the inter-floor adjustment hoisting machine is displaced upward from the fixed position with respect to the outer car.
When the relative displacement of the inter-floor adjustment hoisting machine is detected by the detection switch, a control device that switches and controls the upper car braking device and the lower car braking device from the open state to the gripping state.
With
The elastic member is deformed when the weight of the upper car and the lower car is applied to the floor adjustment hoisting machine via the cord-like body, and the floor adjusting hoisting machine is deformed. When it is housed in a fixed position and the weight of the upper car and the lower car is not applied, it is characterized by having a restoring force having a magnitude that causes the inter-floor adjustment hoisting machine to be displaced upward from the fixed position. Double deck elevator. The double deck elevator according to claim 1, wherein the inter-floor adjustment hoisting machine is installed in the outer car via a vibration isolator. The double according to claim 2, wherein the elastic member is a compression spring and is provided in parallel with the anti-vibration member between the outer cage and the inter-floor adjustment hoisting machine. Deck elevator.