JPH1111824A - Vibration control device for tail cord of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent swinging of a tail cord of an elevator which has a long elevating stroke. SOLUTION: A pulley 11 is supported by a mounting table 10 which is fixed to the under-part of a connection box 4 of an elevator shaft 1. The top of a wire rope 8 is tied with the table 10, while the bottom of the rope 8 is secured a to a bracket 14 fixed to a pit through a turnbuckle 16. A guide pipe at the base end of a receptacle table 7 is loosely fitted on the rope 8, and a pulley 6 is supported by the forefront of the receptacle table 7. A curved part at the bottom of a tail cord 3 is wound round the undersurface of the periphery of the pulley 6. The bottom of a wire rope 13A is tied to the middle of the receptacle table 7, and the top of the wire rope 13A is wound round and a balance weight 12 is hung down at the bottom of the wire rope 13A dangled from the pulley 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator tail cord damping device.

[0002]

2. Description of the Related Art FIG. 6 is a schematic view showing a part of a hoistway of a conventional rope type elevator and a tail cord connected to a car suspended from the hoistway.

In FIG. 6, a car 2 is suspended from a lower end of a main rope 5 hanging from a hoist (not shown) installed in a machine room (not shown) at the upper end of the hoistway 1, and is provided at the lower end of the car. The tail cord 3
Are locked.

[0004] Of the tail cords 3 locked to the fixing portion, a tail cord 3a disposed along the left side surface of the car 2 is connected to a connection box (not shown) mounted on the ceiling of the car 2. ing.

[0005] The tail cord 3a connected to this junction box
Are connected to a door driving motor, a car lighting device, a switch of an operation panel, and the like, which are installed on the ceiling of the car 2, via a terminal block (not shown).

On the other hand, the upper end of the tail cord 3 which is hung down from the fixture at the lower end of the car 2 and forms a curved portion is connected to the terminal block of the joint box 4 fixed to the wall slightly above the middle of the hoistway 1. The cable connected to one side and connected to the other side of the terminal block is arranged in a machine room along the wall of the hoistway, and is connected to a control panel and the like installed in the machine room.

In the elevator constructed as described above, the lower end of the tail cord 3 is slightly curved when the car 2 descends to the first floor, and is slightly curved even when the elevator reaches the top floor. Have been. Therefore, the length suspended from the car 2 is maximized when the car 2 is opposed to the relay box 4, and is slightly longer than one half of the up-and-down stroke.

[0008]

However, in the case of the tail cord 3 suspended in this way, if an earthquake occurs while the car 2 is located in the middle of the hoistway, the tail cord 3 will be lost. There is a possibility that the curved portion at the lower end swings greatly.

Particularly, in a rope-type elevator installed in a skyscraper, the length of the suspended portion from the car 2 to the lower end becomes longer, so that the middle part and lower part of the tail cord are installed inside the hoistway. May come into contact with other devices. Then, not only will this contacted device be damaged,
There is a risk of entanglement. If the car is operated in that state, the damage to the equipment may be increased.

For this reason, Japanese Patent Application Laid-Open No. 4-243787 discloses a structure in which a string is fixed to a tail cord, a weight is attached to the lower end of the cord, tension is applied to the tail cord, and the tail cord is prevented from swinging. ing.

However, this method also cannot completely prevent shaking, especially in the tail cord of a high-rise building. SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator tail cord damping device capable of preventing the tail cord from swaying irrespective of the up-and-down stroke.

[0012]

According to a first aspect of the present invention, there is provided an elevator tail cord damping device, wherein one end is connected to a car and the other end is connected to a hoistway. A lower rotating wheel wound around the outer periphery of the lower surface, a pedestal supporting the lower rotating wheel on one side and forming a guide portion on the other side, and a guide strip fitted to the guide portion and vertically installed on the hoistway. A wire rope having one end fixed to the receiving stand, an intermediate portion wound around an upper rotating wheel of the hoistway, and a balance weight suspended from the other end.

According to a second aspect of the present invention, there is provided an elevator tail cord damping device, comprising: a magnet plate vertically provided on a hoistway;
The magnetic plate is provided with a magnetic plate opposed to the front surface side of the magnet plate, and a pressing tool for pressing a tail cord against the magnetic plate at one end and one end supported by a car that moves up and down the hoistway.

According to a third aspect of the present invention, there is provided an elevator tail cord damping device, comprising: a plurality of restraining frames provided on a hoistway and having an opening formed on a front side of the tail cord for loose fitting; A flexible guide protruding from the opening.

According to a fourth aspect of the present invention, there is provided an elevator tail cord damping device, comprising: a restraining frame having an opening vertically formed in a hoistway and having a front end on which a tail cord is loosely fitted; And an arm having a base end fixed to the car and a distal end connected to the fastener opening / closing tool.

According to a fifth aspect of the present invention, there is provided an elevator tail cord damping device, wherein a guide at which a curved portion at a lower end of the tail cord is loosely fitted is provided, and an upper end is fixed to the guide and a lower end is provided at a pit of a hoistway. And a locking member that is locked to the take-up reel provided in the above.

According to a sixth aspect of the present invention, there is provided an elevator tail cord damping device, comprising: a reel which moves up and down a hoistway, and which rewinds and rewinds a tail cord hanging down from a car with respect to a lower portion of the car. I do.

According to the present invention, the lower guide wheel, on which the curved portion of the tail cord hanging from the car is wound, is guided by the guide strip that guides the lower guide wheel through the receiving stand. invite.

According to a second aspect of the present invention, the tail cord is pressed against the magnetic plate with a pressing member to restrain the position of the tail cord. Use a guide to constrain the position of the tail cord.

Further, in the invention corresponding to claim 4, the position of the tail cord is restrained by the restraining frame and the fastener,
In the invention corresponding to claim 5, the position of the curved portion of the tail cord is restrained by the guide tool fixed by the locking tool, and in the invention corresponding to claim 6, the tail cord is wound and unwound by the reel. The length of the tail cord is reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an elevator tail cord damping device according to the present invention will be described with reference to the drawings. FIG. 1A is a diagram showing a first embodiment of an elevator tail cord damping device according to the present invention, which corresponds to claim 1 and corresponds to FIG. 6 shown in the prior art. (B)
(A) is an AA cross-sectional enlarged detailed view of (a), (c) is (a)
It is a BB cross-section enlarged detailed view.

1 (a), 1 (b) and 1 (c), as shown in FIG. 1 (b), a left side surface (not shown) is provided below the joint box 4 fixed to an intermediate portion of the hoistway 1. As shown in FIG. In the figure, a rectangular mounting plate 10a is fixed via four anchor bolts driven into a wall surface.

On the mounting plate 10a, the bottom of the mounting base 10, which is formed in a substantially U-shape and both sides of the open end are bent outward in an L-shape to form bent portions 10b and 10c, is fixed in advance by welding. ing.

A shaft 10d is horizontally inserted through the mounting base 10, and a pulley 11 loosely fitted into an opening of the mounting base 10 is press-fitted into the center of the shaft 10d at the center thereof. Has been inserted through.

At the ends of the bent portions 10b and 10c, the upper end of the wire rope 8 is locked via three wire clips.
The wire rope 8 hangs down the hoistway 1, and the lower end is connected via a turnbuckle 16 to the upper end of a short wire rope 8 a via a wire clip.
The lower end of “a” is connected to the upper end of a substantially L-shaped bracket 14 erected in the pit of the hoistway 1 via a wire clip.

The lower part of the wire rope 8 is shown in FIG.
As shown in (c), a guide tube 9 made of phosphor bronze is loosely fitted in advance, and a bottom plate 7a of a pedestal 7 formed in a substantially π shape is brazed to an opposing surface of the guide tube 9. .

A shaft 7b press-fitted into the pulley 6 via a bearing is inserted into the cradle 7, and the lower end of the wire rope 13A is locked to the base end of the cradle 7. After the upper end of the wire rope 13A is wound around the pulley 11 described above,
Hanging along the wall of the hoistway 1, a small counterweight 12 is fixed to the lower end. A curved portion at the lower end of the tail cord 3 is wound around the pulley 6 supported by the cradle 7.

In the elevator tail cord damping device thus constructed, for example, when the car 2 moves upward, the pulley 6 is guided by the wire rope 8 and follows the ascending pedestal 7 and the guide tube 9 to move the wire. Ascend the hoistway along the rope 8.

The cage side of the wire rope 13A also rises with the rise of the pulley 6, the cradle 7 and the guide tube 9, and the balance weight locked to the other end of the wire rope 13A by this rise.
12 falls.

Therefore, the pulley 6 is connected to the wire rope 13A.
1 (a), the tail cord 6 is supported not only by moving up and down while minimizing the tension applied to the tail cord 6, but also supported by a receiving table 7 which is guided up and down by a pair of wire ropes 8. Shaking in the orthogonal direction or the parallel direction can be effectively prevented.

In the above embodiment, a grease nipple is screwed into the side surface of the guide tube 9 to inject grease during periodic maintenance and inspection, or a linear motion bearing is pressed into upper and lower ends of the guide tube 9. Thus, abrasion of the wire of the wire rope 8 due to friction between the guide pipe 9 and the wire rope 8 may be prevented.

Next, FIG. 2 is a view showing a second embodiment of an elevator tail cord damping device according to the present invention, which corresponds to claim 2 and is shown in FIG. 1 (a) shown in the first embodiment. FIG.

In FIG. 2, a magnetized strip-shaped magnet plate 17A is attached to the right wall surface of the hoistway 1, and the upper end is fixed to the wall surface of the hoistway. A thin magnetic plate 17B is attached to the car side of the magnet plate 17A, and the upper end is similarly fixed.

On the other hand, at the lower end on the right side of the car 2, a base end of an arm 18 formed of a glass-reinforced fiber in a tubular shape is swingably supported via a support shaft, and the arm 18 is wound around the support shaft. The inserted spiral spring (not shown) makes it slightly swingable. A sliding piece 19 made of a fluororesin material is attached to the tip of the arm 18, and the front end face of the sliding piece 19 is pressed by the tail cord 3.

In the elevator tail cord vibration damping device configured as described above, as shown in FIG.
In the first floor, the tail cord 3 is pressed against the magnet plate 17B via the sliding piece 19 at the tip of the arm 18, and the upper half of the magnet plate 17B is attracted to the magnet plate 17A. , The tail cord 3 can be prevented from shaking.

Also, even when the car 2 rises and is opposed to the splice box 4 and the length of the tail cord 3 hanging down from the car 2 is maximum, the sliding piece 19 at the tip of the arm 18 allows the upper portion of the tail cord 3 to move upward. Shaking can be restrained.

The flat shape of the tip of the contact 19 is U-shaped, and one side of the tail cord 3 is pressed by the U-shaped bottom.
The tail cord 3 may be further restrained by guiding the side surface of the tail cord 3 with the U-shaped opposing surfaces on both sides.

FIG. 3 (a) is a view showing a third embodiment of an elevator tail cord damping device according to the present invention, and corresponds to claim 3 and is shown in FIG. 2A and 2B, and FIG. 2B is an enlarged detailed cross-sectional view taken along the line CC of FIG. 1A, and is a view corresponding to FIG.

In FIGS. 3 (a) and 3 (b), a substantially U-shaped stop frame 20 is fixed to the left and right L-shapes from the joint box 4 to the lower wall of the hoistway. Four are mounted at equal intervals via a tool and anchor bolts.

A base end of a coil spring 20a is formed inside the front end of the restraining frame 20 and is screwed into a screw hole formed at the front end of the restraining frame 20, and is fixed by a bolt screwed from the outer surface side. I have.

The tip of the coil spring forms a straight portion, and the guide tube 20b is loosely fitted in the straight portion. The tail cord 3 is loosely fitted inside the restraining frame 20 as shown in FIG.

In the elevator tail cord damping device thus constructed, when the car rises in FIG. 3 (a), the rise of the curved portion at the lower end of the tail cord 3 causes the restraining frame 20 attached to the lower end to rise. The guide tube 20b is pushed to the car side together with the coil spring 20a as shown by the arrow in FIG. 3B, and the tail cord 3 escapes to the car side by bending.

Thereafter, as the car 2 rises, the upper stop frame
When the car 2 descends in the opposite direction, the descending tail cord 3 presses the guide tube 20b, and as a result, the coil spring 20a bends. It fits loosely inside. Again, in this case,
The restraining frame 20 can effectively prevent the tail cord 3 from swinging.

FIG. 4A is a view showing a fourth embodiment of an elevator tail cord damping device according to the present invention.
FIG. 1 corresponding to claim 4 and shown in the embodiment described above.
FIG. 3A is a diagram corresponding to FIG. 2 and FIG. 4B is an enlarged cross-sectional view taken along line EE of FIG. 4A, and FIG. 4C is an enlarged view taken along line D-D of FIG. 4A.

In FIGS. 4 (a), (b) and (c),
From the joint box 4 to the first floor, a U-shaped cover 21 made of resin is vertically provided on the wall of the hoistway via an anchor bolt, and a fastener 22 is provided on an opening side of the cover 21 on the car side. Arm that protrudes the hook part from the lower end of car 2
Connected to 18 tips.

Also in this case, the arm 18
By opening the fastener 22 through the hook portion, the tail cord 3 inside the cover 21 can escape, and when the car is lowered, the tail cord 3 is housed inside the cover 21 by closing the fastener 22. .

FIG. 5A is a view showing a fifth embodiment of an elevator tail cord damping device according to the present invention.
As shown in the above embodiment, FIG.
(A), FIG. 2, FIG. 3 (a), and FIG. 4 (a). Due to space limitations, the hoistway 1 shows only the right side wall, and the left side is omitted.

In FIG. 5A, a U-shaped bracket 24a in a side view (not shown) is used for the pits of the hoistway.
Is erected via anchor bolts, and this bracket 24a
A take-up reel 24 is inserted through the shaft 25b.

A constant torque spring made of a spring steel plate wound spirally is provided between the shaft 25b and the reel 24.
25b, and the other end is fixed to the drum of the reel 24 and stored.

On the other hand, a U-shaped guide gutter 23 having an open outer side in a sectional view (not shown) is attached to the curved portion at the lower end of the tail cord 3, and a plurality of rollers are provided at the bottom of the guide gutter 23. Are provided continuously. Therefore, the inside of the curved portion of the tail cord 3 loosely fitted to the guide gutter 23 is in contact with the outer surface of the roller.

The lower end of the guide gutter 23 is connected to the upper end of a wire rope 13B. The lower end of the wire rope 13B is connected to the outer end of the constant torque spring wound on the take-up reel 24. Has been stopped.

In the tail cord damping device constructed as described above, when the car 2 in the state of FIG. 5 moves upward, the inside of the guide gutter 23 moves from the right side to the left side as indicated by an arrow. The tail cord can prevent the outer jacket from being worn by the rotation of rollers provided continuously inside the guide gutter 23.

On the other hand, the guide gutter 23 also rises as the car 2 rises, and this guide gutter 23 is pulled downward by a constant force by the constant torque spring of the take-up reel 24 via the wire rope 13B. Therefore, the swing of the guide gutter 23 and the curved portion of the tail cord moving inside the guide gutter 23 can be suppressed. Note that the take-up reel 24 may control the number of rotations of the drum with an electric motor and omit the constant torque spring.

Next, FIG. 5B is a diagram showing a sixth embodiment of the tail cord vibration damping device for an elevator according to the present invention.
As shown in the above-described embodiment, FIG.
(A), FIGS. 2, 3 (a), 4 (a) and 5 (a)
FIG.

In FIG. 5B, a different point from the above-mentioned embodiment is that a take-up reel 25 is provided at the lower part of the car 2 and the guide wheel 26 is attached to the arm 18 It is provided through.

That is, a tail cord hanging from the side of the car 2 is inserted into the take-up reel 25 from one end of the rotary tube of the take-up reel 25, and is passed through the inner ring of the bearing press-fitted into the end. The rotating tube is drawn out from the intermediate portion to the outer periphery of the rotating tube.

The tail cord pulled out of the outer periphery of the rotating tube turns the outer periphery of the rotating tube counterclockwise about one turn,
After passing through the lower surface of the outer periphery of the guide wheel 26 at the tip of the arm 18B, the joint box 4
It is connected to the. The take-up reel 25 has a built-in constant torque spring similarly to the take-up reel 24 shown in FIG.

Also in the elevator tail cord vibration damping device thus constructed, when the car 2 rises, the tail cord can be taken up by the take-up reel 25 to prevent bending, so that the tail cord swings. This prevents damage to the tail cord and the equipment inside the hoistway.

[0059]

As described above, according to the invention corresponding to the first aspect, the curved portion at the lower end of the tail cord whose one end is connected to the car and the other end is connected to the hoistway is wound around the lower surface. A lower rotating wheel, a pedestal supporting the lower rotating wheel on one side and forming a guide on the other side, a guide strip fitted to the guide and vertically installed on the hoistway, and one end fixed to the cradle And a wire rope having an intermediate portion wound around the upper rotating wheel of the hoistway and a balance weight suspended at the other end, thereby receiving the lower guide wheel around which the curved portion of the tail cord hanging from the car is wound. Since the guide is guided by the counterweight and the counterweight guided through the stand, it is possible to obtain an elevator tail cord damping device capable of preventing the tail cord from swaying irrespective of the up-and-down stroke.

According to the second aspect of the present invention,
A magnet plate vertically provided in the hoistway, a magnetic plate opposed to the surface side of the magnet plate, and a pressing tool that presses the tail cord against the magnetic plate at one end and is supported at one end by a car that moves up and down the hoistway. By providing, the tail cord is pressed against the magnetic plate with the pressing tool and the position of the tail cord is restrained, so the elevator tail cord vibration damping device that can prevent the tail cord from swaying regardless of the up-and-down stroke. Obtainable.

According to the third aspect of the present invention,
An opening provided in the hoistway and in which the tail cord is loosely fitted has a plurality of restraining frames formed on the front side, and a flexible guide protruding from the opening of the restraining frame to provide a restraining frame. Since the position of the tail cord is restrained by the flexible guide, it is possible to obtain an elevator tail cord damping device capable of preventing the tail cord from swaying irrespective of the up-and-down stroke.

According to a fourth aspect of the present invention,
A restraining frame vertically formed in the hoistway and having an opening on the front side in which the tail cord is loosely fitted, a fastener provided on the opening side of the restraining frame, and a fastener whose base end is fixed to the car and whose tip is a fastener. Elevator tail cord system that can prevent tail cord swaying irrespective of the up-and-down stroke, because the arm is connected to the opening and closing device of the tail cord, the position of the tail cord is restrained by the stop frame and the fastener A vibration device can be obtained.

According to the invention corresponding to claim 5,
By providing a guide in which the curved portion at the lower end of the tail cord is loosely fitted, and a stopper in which the upper end is locked to the guide and the lower end is locked to a take-up reel provided in a pit of the hoistway. Because the position of the curved part of the tail cord was restrained by the guide that is locked by the locking device, regardless of the up-and-down stroke,
An elevator tail cord damping device capable of preventing tail cord shaking can be obtained.

Further, according to the invention corresponding to claim 6, the tail cord is wound up and down on the hoistway, but is provided with a tail cord take-up and rewind hanging from the car at the lower part of the car. Since the hanging length of the tail cord is reduced, it is possible to obtain an elevator tail cord damping device capable of preventing the tail cord from swaying irrespective of the up-and-down stroke.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of an elevator tail cord damping device according to the present invention, wherein FIG. 1 (a) is an overall view including a hoistway, and FIG. 1 (b) is an AA cross-sectional enlarged detail of FIG. FIG. 3C is an enlarged detailed cross-sectional view taken along line BB of FIG.

FIG. 2 is an overall view including a hoistway showing a second embodiment of an elevator tail cord damping device according to the present invention.

3A and 3B are diagrams showing a third embodiment of an elevator tail cord damping device according to the present invention, wherein FIG. 3A is an overall view including a hoistway, and FIG. FIG.

4A and 4B are diagrams showing a fourth embodiment of an elevator tail cord damping device according to the present invention, wherein FIG. 4A is an overall view including a hoistway, and FIG. FIG. 3C is an enlarged detail view taken along the line DD in FIG.

FIG. 5A is an overall view including a hoistway showing a fifth embodiment of an elevator tail cord damping device of the present invention,
(B) is an overall view including a hoistway showing a sixth embodiment of the elevator tail cord damping device of the present invention.

FIG. 6 is a diagram showing an example of a conventional elevator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hoistway, 2 ... Basket, 3 ... Tail cord, 4 ... Connection box, 5 ... Main rope, 6, 11 ... Pulley, 7 ... Cradle, 8, 13
A, 13B: wire rope, 9: guide tube, 10: mounting base, 12
... balance weight, 14 ... bracket, 15 ... wire clip, 16 ... turnbuckle, 17A ... magnet plate, 17B ... magnetic plate, 18A, 18B ... arm, 19 ... sliding piece, 20 ... stop frame, 20a ...
Coil spring, 20B: guide tube, 21: cover, 22: fastener, 23: guide gutter, 24, 25: reel, 26: guide wheel.

Claims (6)

[Claims] 1. A lower rotating wheel having a curved lower end portion of a tail cord wound around a lower surface and having one end connected to a car and the other end connected to a hoistway, and supporting the lower rotating wheel on one side. A pedestal having a guide portion formed on the other side, a guide strip fitted to the guide portion and vertically provided in the hoistway, and an intermediate portion having one end connected to the pedestal and rotating at an upper portion of the hoistway. A tail cord damping device for an elevator, comprising a wire rope wound around a wheel and a balance weight suspended from the other end. 2. A magnet plate vertically provided in a hoistway, a magnetic plate opposed to a surface side of the magnet plate, and one end supported by a car moving up and down the hoistway, and a tail attached to the magnetic plate at the other end. An elevator tail cord damping device provided with a pressing tool for pressing a cord. 3. An elevator provided with a plurality of restraining frames provided in a hoistway and having an opening formed on a front side thereof into which a tail cord fits loosely, and a flexible guide protruding from the opening of the restraining frame. Tail cord damping device. 4. A restraining frame having an opening vertically formed in a hoistway and having a tail cord loosely fitted inside formed on a front side, a fastener provided on the opening side of the restraining frame, and a base end formed in a car. A tail cord damping device for an elevator, the arm having a fixed end and an arm connected to the fastener opening / closing tool. 5. A guide in which a curved portion at a lower end of a tail cord is loosely fitted, and an upper end is connected to the guide and a lower end is connected to a take-up reel provided in a pit of the hoistway. Tail cord damping device equipped with tools. 6. A tail cord vibration damping device for an elevator, comprising a reel which takes up and rewinds a tail cord hanging from the car at a lower portion of the car which moves up and down a hoistway.