KR101136645B1 - Apparatus for emergency stop of an elevator - Google Patents

Abstract

PURPOSE: An apparatus for stopping an elevator in an emergency is provided to prevent the malfunction of an elevator by controlling the brake of an elevator by using a pulley and a rope when being fast elevated. CONSTITUTION: A first receiving portion(110) is installed between an elevator cage and a lifting device and is circular having a predetermined diameter. A first rotary shaft is formed in an upper center of the first receiving portion. A second receiving portion(120) having the predetermined diameter is circular and installed in a mainframe(100). A first pulley portion(130) becomes rotated while being inserted into a first rotary shaft(111) and includes a first cylinder(131) and a first concave groove(133). A second pulley portion(140) is rotated while being inserted into a second rotary shaft(121) and a second cylinder(141) and a second concave groove(143). A wire rope is connected to an elevator cagewhile surrounding a lower side of the second pulley portion and an upper side of the first pulley portion.

Description

Elevator Emergency Stop Device {APPARATUS FOR EMERGENCY STOP OF AN ELEVATOR}

The present invention relates to an elevator, and in detail, the rating of the elevator cage through a pair of pulleys that rotate with the transfer of the wire rope to raise and lower the elevator cage and a cylinder operated by a centrifugal force generated in accordance with the increase in the rotational speed of the pulleys An elevator emergency stop device for making an emergency stop when the speed is exceeded.

In the case of the conventional elevator, when the governor located in the machine room detects that the elevator cage moves beyond the rated speed, the emergency stop of the elevator is usually performed by sequentially performing the following two operations.

In the first operation, when the speed of the elevator cage reaches 130% of the rated speed, the elevator cage is stopped by turning off the power of the lifting means made of the hoist and simultaneously operating the brake. In the second operation, when the speed of the elevator cage reaches 140% of the rated speed, the pendulum installed on the governor wheel is operated by centrifugal force following the first operation to operate the lever, and the stop chain is interlocked to stop the ratchet. The rope cage, which is integrally connected to the detent chain, stops the elevator cage by decelerating and stopping the wire rope passing through the governor. Further, following the second operation, the braking device in the lower part of the elevator cage is operated to hold the guide rail with a strong force.

However, in the operation of the second operation and the braking device, the complicated operation structure, the degeneration of the spring of the governor, the wear of the mechanical movable element, etc. may prevent the operation of the elevator cage at the correct speed, and the elevator cage suddenly descends. In this case, the emergency stop is impossible when the elevator cage rises above the rated speed, which is also considered as a cause of an accident.

The present invention was created in order to solve the above problems, the object of the present invention can be applied to both the rising and falling of the elevator cage, the emergency stop is made by reacting quickly when the rated speed of the elevator cage is exceeded through reliable operation It is to provide an emergency stop of the elevator to be built.

In order to achieve the above object, the present invention provides an elevator emergency stop device for generating a braking force in accordance with an increase in a feed speed of a wire rope, one end of which is connected to an elevator cage and the other end of which is connected to a lifting means. It is installed between the elevating means, a circular first receiving portion having a predetermined diameter with a first rotating shaft formed in the center of the upper side, and a circular diameter having a predetermined diameter with a second rotating shaft formed in the center of the lower side of the first storage portion. A main frame having a second housing part formed thereon; The first cylinder is rotated by being inserted into the first rotation shaft, the first cylinder having a first brake plate extending on one side by centrifugal force and contacting the inner circumferential surface of the first accommodating portion at an outer end thereof, and the wire along the outer circumferential surface on the other side thereof. A first pulley part having a first groove part into which a rope is inserted; The second cylinder is inserted into the second rotary shaft and rotates, and on one side thereof, a second cylinder having a second brake plate extending in length by a centrifugal force and contacting the inner circumferential surface of the second housing part is installed, and on the other side of the wire along an outer circumferential surface thereof. A second pulley part having a second groove part into which a rope is inserted; It is made, including, the wire rope is characterized in that configured to be connected to the elevator cage by one end is wrapped around the upper side of the first pulley portion after wrapping the lower side of the second pulley portion.

At this time, the first cylinder and the second cylinder is composed of a two-way hydraulic cylinder with a chamber formed inside and outside, respectively, the first cylinder and the second cylinder is an elastic body that acts to shrink the respective length, the inner chamber and the outer chamber It is preferable that the return tube and the check valve is installed on the return tube is configured to allow the hydraulic fluid of the outer chamber to move to the inner chamber.

The return tube may further include a release valve configured to be opened and closed by an external operation and configured to allow the working oil of the inner chamber to flow into the outer chamber.

Preferably, the first groove portion and the second groove portion are provided with a protrusion having a shape corresponding to the outer circumferential surface of the wire rope.

In addition, it is preferable that a sanding treatment is performed on the inner circumferential surfaces of the first and second storage parts to increase the coefficient of friction.

According to the present invention, it is not necessary to install a governor having a separate rope for emergency stop when an abnormality occurs in the elevator, so that space utilization in the elevator installation space is easy. In addition, the present invention does not require a separate drive device, and according to the excess detection of the rated speed of the elevator cage, fast and reliable operation is made.

The present invention provides a quick and complete braking of the elevator as well as falling of the elevator, so that the safety of passengers or cargo can be further improved, and accidents are prevented. The elevator can run more smoothly.

1 is a configuration diagram showing a state in which the present invention is applied to the existing elevator,
2 is a perspective view showing the wire rope is installed in the first pulley part and the second pulley part of the present invention;
3 is an exploded perspective view showing the main frame and the first pulley part and the second pulley part installed therein;
4 is a partial perspective view showing a state of a first pulley part seen from the first storage part side;
5 is a cross-sectional view showing the main frame and the first pulley part and the second pulley part installed therein;
6 is an operation diagram showing the structure and operation of the first cylinder to which the two-way hydraulic cylinder is applied.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the elevator emergency stop device of the present invention.

1 is a configuration diagram showing a state in which the present invention is applied to the existing elevator, Figure 2 is a perspective view showing the wire rope is installed in the first pulley part and the second pulley part of the present invention.

As shown in FIG. 1, the present invention includes a main frame 100 installed on a wire rope 400 having one end connected to an elevator cage 200 and the other end connected to a lifting means 300. The main configuration is made of the first pulley portion 130 and the second pulley portion 140.

The mainframe 100 is configured independently of the elevator cage 200 and the lifting means 300, the upper side of the elevator cage 200 so as not to affect the movement of the elevator cage 200 rise and fall It is fixedly installed at a sufficiently separated position.

The wire rope 400 is wound around and transported to the main frame 100, and the first pulley part 130 and the second pulley part 140 configured to rotate freely according to the transfer of the wire rope 400 are upper and lower sides. Are installed on each. In detail, circular first and second storage parts 110 and 120 having a predetermined diameter are formed on the upper and lower parts of the main frame 100, respectively, and the upper first and second storage parts 110 are formed. In the center of the first rotation shaft 111, the second rotation shaft 121 is protruded in the center of the lower second receiving portion 120, respectively.

Thereafter, the first pulley part 130 is inserted into the first rotation shaft 111, and the second pulley part 140 is inserted into the second rotation shaft 121, respectively, so as to rotate freely. It is preferable to provide. In the present invention, the first pulley part 130 and the second pulley part 140 have substantially the same shape and configuration, and are also stopped together due to the same rotational force by receiving a uniform force due to the same wire rope 400. It is preferable that the same dimensions are formed.

The first pulley part 130 and the second pulley part 140 increase in rotation speed and centrifugal force as the feed speed of the wire rope 400 increases, and accordingly, the first cylinder 131 for generating a braking force. And the second cylinders 141 are provided on the first and second storage units 110 and 120, respectively, so that the first and second storage units 110 and 120 are formed of a second cylinder 141. It has a suitable diameter so that the first cylinder 131 and the second cylinder 141 can be located.

3 is an exploded perspective view showing a main frame and a first pulley part and a second pulley part installed therein, FIG. 4 is a partial perspective view showing a first pulley part viewed from the first storage part side, and FIG. As a cross-sectional view showing the first pulley portion and the second pulley portion installed in this, it will be described in detail the configuration of the first pulley portion and the second pulley portion.

The first pulley part 130 is inserted into the first rotation shaft 111 and configured to rotate freely. An extended first cylinder 131 is installed.

In this case, as the length of the first cylinder 131 is extended to the outer end of the first cylinder 131, the first brake plate 132 configured to contact the inner circumferential surface of the first accommodating part 110 is coupled. That is, when the first pulley part 130 rotates at the rated speed or more, the first cylinder 131 is extended outward by the centrifugal force, and the first brake plate coupled to the outer end of the first cylinder 131 ( The rotation of the first pulley part 130 is stopped through the friction generated while the 132 contacts the inner circumferential surface of the first storage part 110. In this case, two or more first cylinders 131 are preferably provided for smooth braking performance, and the first braking plate 132 extends the first cylinder 131 by centrifugal force with good friction performance. It is configured to have a weight sufficient to make it.

In addition, the first cylinder 131 may be applied to various types of cylinders, the length is extended by the centrifugal force is configured to require an additional operation in order to reduce the extended length to the original state. In other words. When the length of the first cylinder 131 is extended by the centrifugal force and the rotation of the first pulley part 130 stops, as the centrifugal force of the first pulley part 130 disappears, the length of the first cylinder 131 is arbitrarily reduced. Do not stand, the first pulley 130 is maintained so as not to rotate until the action according to the emergency stop of the elevator is completed.

On the other side of the first pulley portion 130 is formed a first groove portion 133, the wire rope 400 is partially inserted along the outer circumferential surface, the wire rope is separated from the first pulley portion 130 during transfer To prevent them.

As described above, the second pulley part has the same configuration as that of the first pulley part, and is inserted into the second rotation shaft 121 and configured to rotate freely, and the second pulley part 120 is formed in a centrifugal force in one direction. As a result, a second cylinder 141 extending in length from the central axis direction to the outward direction is provided.

In this case, as the length of the second cylinder 141 is extended to the outer end of the second cylinder 141, the second braking plate 142 configured to contact the inner circumferential surface of the second housing part 120 is coupled. That is, when the second pulley part 140 rotates at the rated speed or more, the second cylinder 141 is extended outward by the centrifugal force, and the second brake plate coupled to the outer end of the second cylinder 141 ( The rotation of the second pulley part 140 is stopped by the friction generated while the 142 contacts the inner circumferential surface of the second housing part 120. In this case, two or more second cylinders 141 are preferably provided for smooth braking performance, and the second braking plate 142 extends the second cylinder 141 by centrifugal force with good friction performance. It is configured to have a weight sufficient to make it.

In addition, the second cylinder 141 may be applied to various kinds of cylinders, the length is extended by the centrifugal force is configured to require an additional operation in order to reduce the extended length to its original state. In other words. When the length of the second cylinder 141 is extended by the centrifugal force and the rotation of the second pulley part 140 stops, the length of the second cylinder 141 is arbitrarily reduced as the centrifugal force of the second pulley part 140 disappears. Do not stand, and the second pulley portion 140 is maintained so as not to rotate until the action according to the emergency stop of the elevator is completely made.

On the other side of the second pulley portion 140 is formed a second groove portion 143 in which the wire rope 400 is partially inserted along the outer circumferential surface, so that the wire rope is separated from the second pulley portion 140 during transportation. To prevent them.

As shown in FIG. 2, one end of the wire rope 400 is lowered from the upper side to surround the lower side of the second pulley part 140, and then proceeds downward while surrounding the upper side of the first pulley part 130. It is connected to the elevator cage 200.

Through the connection of the wire rope 400, the lifting means 300 to lift the wire rope 400 to raise the elevator cage 200, or to unwind the wire rope 400 to lift the cage cage 200 At the time of lowering the operation, below the rated speed, the first pulley portion 130 and the second pulley portion 140 is free to rotate with the transfer of the wire rope, elevator cage 200 is raised or lowered without any resistance, When the rated speed is exceeded, as the centrifugal force of the first pulley part 130 and the second pulley part 140 increases, the first cylinder 131 and the second cylinder 141 operate to operate the first pulley part 130. And the second pulley part 140 stops rotation, and a strong resistance is generated in the wire rope 400 to stop the movement of the elevator cage 200.

The first cylinder 131 and the second cylinder 141 is preferably implemented by the following hydraulic cylinder, not a mechanical cylinder in order to prevent the operation reliability is lowered due to wear and the like. FIG. 6 is an operation diagram showing the structure and operation of the first cylinder to which the two-way hydraulic cylinder is applied. Hereinafter, the configuration of the first cylinder 131 and the second cylinder 141 made of the hydraulic cylinder will be described.

Since the first cylinder 131 and the second cylinder 141 are installed in the first pulley part 130 and the second pulley part 140, respectively, they have substantially the same configuration, and thus have the same configuration. The same reference numerals will be used. Hereinafter, the configuration and operation of the first cylinder 131 will be described.

The first cylinder 131 may be formed of a bidirectional hydraulic cylinder having a chamber formed inside and outside, respectively. At this time, the first cylinder 131 is provided with an elastic body E, which acts to shrink the length of the first cylinder 131. The elastic body (E) is generally made of a spring, the centrifugal force generated during the rotation of the first pulley portion 130 should be more than the force acting the elastic body (E), the elastic body (E) is an elevator cage ( When the length 200 is greater than or equal to the rated speed, the first cylinder 131 may have an appropriate modulus of elasticity to be extended.

The first cylinder 131 is a hydraulic fluid of the outer chamber is transferred to the inner chamber when the length is extended, the hydraulic fluid of the inner chamber is transferred to the outer chamber when the length contraction, the return tube (RT) connecting the inner chamber and the outer chamber Equipped.

In addition, as described above, since the first cylinder 131 is expanded by the centrifugal force, it should not be contracted even in the state where the centrifugal force is lost, so the return tube RT has a check configured to move the working oil of the outer chamber to the inner chamber. A valve CV is provided. The check valve CV allows the hydraulic fluid of the outer chamber to move to the inner chamber, but does not allow the hydraulic fluid of the inner chamber to move to the outer chamber, so that the first cylinder 131 may extend in the outward direction. Do not shrink.

After the action according to the emergency stop of the elevator, by operating the check valve (CV) from the outside through the action of the elastic body (E) the operating oil of the inner chamber is moved to the outer chamber length of the first cylinder 131 To shrink to its initial state.

In general, the check valve is provided with a retractable valve body therein to transfer the fluid in one direction, but when the flow of the fluid stops or a reverse flow is detected, the valve body is closed due to the back pressure of the fluid to prevent backflow. Operation means operating the valve body to open.

Alternatively, as shown in FIG. 6, the return tube RT may further include a release valve (RV) configured to be opened and closed by an external operation separately from the check valve CV and configured to allow the working oil of the inner chamber to flow to the outer chamber.

The release valve (RV) is normally closed so that the hydraulic fluid of the outer chamber is transferred to the inner chamber through the check valve (CV) by the centrifugal force of the first pulley part 130 and the length is extended, and the action for emergency stop of the elevator is After the release valve RV is opened by an external operation, the working oil of the inner chamber is transferred to the outer chamber through the action of the elastic body E, and the first cylinder 131 is contracted.

When the rotation of the first pulley part 130 and the second pulley part 140 is stopped by the action of the first cylinder 131 and the second cylinder 141, the wire rope 400 is the first yaw In order to prevent sliding along the groove 133 and the second groove 143, protrusions having a shape corresponding to the outer circumferential surface of the wire rope 400 are formed on the first groove 133 and the second groove 143. It is preferable that 134 and 144 be formed.

Typically, the wire rope 400 is made by twisting a plurality of thin wires, so that a predetermined pattern of grains are formed along the outer circumferential surface. Protruding portions 134 and 144 having corresponding shapes are formed in the first groove portion 133 and the second groove portion 143 to stop rotation of the first pulley portion 130 and the second pulley portion 140. When the wire rope 400 is firmly fixed without slipping so that the elevator cage 200 is stopped.

In addition, a sanding treatment is performed on the inner circumferential surface of the first storage unit 110 in contact with the first brake plate 132 and the second storage unit 120 in contact with the second brake plate 142 for smooth braking performance. It is preferable. The sanding treatment is a means for increasing the coefficient of friction between the inner circumferential surfaces of the first and second accommodating parts 110 and 120 to have a fine roughness, such as the surface of sandpaper, so that effective braking is achieved.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

100: main frame 110: first storage
111: first rotating shaft 120: second storage portion
121: second axis of rotation 130: first pulley
131: first cylinder 132: first braking plate
133: first groove portion 140: second pulley portion
141: second cylinder 142: second braking plate
143: second recess 134, 144: protrusion
200: elevator cage 300: lifting means
400: wire rope E: elastomer
RT: Return Tube CV: Check Valve
RV: release valve

Claims (5)

In the elevator emergency stop device that generates a braking force in accordance with the increase in the feed speed of the wire rope 400, one end is connected to the elevator cage 200 and the other end is connected to the elevating means (300),
The first cage 110 is installed between the elevator cage 200 and the elevating means 300, and has a predetermined diameter having a first rotation shaft 111 formed at a central portion thereof in an upper side thereof. A main frame 100 having a circular second receiving unit 120 having a predetermined diameter in which a second rotating shaft 121 is formed in a central portion below the payment unit 110;
The first cylinder is inserted into the first rotation shaft 111 and rotated, but one side of which is extended by a centrifugal force and has a first braking plate 132 contacting the inner circumferential surface of the first accommodating part 110 at an outer end thereof. 131 is installed, the other side of the first pulley portion 130 is formed with a first groove portion 133 is inserted into the wire rope 400 along the outer peripheral surface;
A second cylinder (2) having a second braking plate (142) formed therein to be rotated by being inserted into the second rotary shaft (121), the length of which is extended by a centrifugal force, and is in contact with the inner circumferential surface of the second housing (120) at an outer end thereof; A second pulley part 140 having a second recess portion 143 formed therein and having a second recess 143 into which the wire rope 400 is inserted along the outer circumferential surface; Including but not limited to,
The wire rope 400 is configured to be connected to the elevator cage 200 by proceeding while wrapping one end wraps the lower side of the second pulley portion 140 and wraps the upper side of the first pulley portion 130. Elevator emergency stop device characterized in that.
The method of claim 1,
The first cylinder 131 and the second cylinder 141 is composed of a two-way hydraulic cylinder with a chamber formed inside and outside, respectively,
The first cylinder 131 and the second cylinder 141 are each an elastic body (E) acting to shrink the length, the return tube (RT) connecting the inner chamber and the outer chamber, and the return tube (RT) on The elevator emergency stop device, characterized in that it comprises a check valve (CV) configured to move the hydraulic fluid in the outer chamber to the inner chamber.
The method of claim 2,
The return tube (RT) is opened and closed by an external operation elevator emergency stop device further comprises a release valve (RV) configured to flow the working oil of the inner chamber to the outer chamber.
The method of claim 1,
The first recess 133 and the second recess 143, the elevator emergency stop device, characterized in that the projections 134, 144 of the shape corresponding to the outer peripheral surface of the wire rope 400 is formed.
The method of claim 1,
An elevator emergency stop device, characterized in that the sanding treatment for increasing the coefficient of friction is made on the inner circumferential surfaces of the first housing 110 and the second housing 120.

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