Clamping device for elevator guide rail

Abstract

The present invention relates to a clamping device for an elevator guide rail, and more particularly to a clamp installed in a shell and a guide rail that are equipped in an elevator and an elevator shaft to guide the elevator's ascent and descent. The clamp pressurizes and fixes the guide rail by a cylinder equipped in the shell, thereby firmly fixing the guide rail when the door is opened and preventing the elevator car from shaking when going up and down the elevator. In particular, the clamping device for an elevator guide rail can prevent the elevator car from lowering due to the stretching of the rope installed on the elevator car when heavy equipment such as a small forklift enters the elevator car when the elevator car is stopped, further eliminating the fear and anxiety of the workers, and preventing unforeseen accidents and thereby improving safety.

Description

Technical Field

[0001] The present invention relates to a clamping device for an elevator guide rail, which is provided in an elevator car that ascends and descends along an elevator shaft and firmly clamps the guide rail in response to an operation signal received from an elevator control unit.

[0002] Disclosed is a clamping device including a housing integrally coupled to an elevator car and a clamp equipped on the housing for pressurizing and fixing the guide rail.

[0003] The elevator guide rail clamping device according to the present invention can firmly clamp the guide rail when the elevator car reaches the target floor and opens the door according to a signal from the control unit, thereby preventing the elevator car from shaking or trembling during boarding and exiting. In particular, the device can prevent the elevator car from falling momentarily due to the stretching of the traction rope connected to the elevator car when heavy equipment such as a small forklift enters the elevator car or loads heavy objects into the elevator car while the elevator car is stopped. Furthermore, the device can prevent the elevator car from rising momentarily due to the recovery of the stretched traction rope when the heavy equipment exits the elevator car or unloads heavy objects from the elevator car. Thus, the device can prevent safety accidents that may occur when heavy equipment enters or exits the elevator car and improve the safety of the elevator car. Background Art

[0004] Typically, elevator systems are installed within buildings, with the elevator car moving along vertical guide rails in the elevator shaft, selectively using support assemblies or a drive acting directly on the car or counterweight. Elevator systems are used to transport people and goods within single- or multi-story buildings and include various safety features to protect the elevator cabin in the event of a drive or support assembly failure.

[0005] As prior arts related to the safety device as described above, there have been disclosed Utility Model Gazette No. 20-1994-0002173 “Braking device of elevator” (hereinafter referred to as “prior art 1”), Publication Patent No. 10-1995-0031859 ​​“Safety stop device of elevator” (hereinafter referred to as “prior art 2”), Patent Gazette No. 10-1994-0003953 “Safety device of elevator” (hereinafter referred to as “prior art 3”) and Registered Patent No. 10-0879681 “Emergency stop device of elevator” (hereinafter referred to as “prior art 4”).

[0006] In the prior art 1, a method is disclosed in which, when the elevator stops at the service floor (arrival floor), the door lock switch 13 installed in the door frame of the elevator is used as a mechanical device to open and close the door 7, and then the brake 14 installed in the winding machine on the upper part of the elevator is driven to work by utilizing the electrical signal of the electrical contacts inside the door lock switch 13. When the door 7 of the elevator is closed, the door lock switch 13 is driven to work mechanically, thereby utilizing the disconnection of the electrical contacts inside the door lock switch 13 to transmit an electrical signal to the control unit 15, and then the control unit 15 drives the brake 14 installed in the winding machine to work, thereby preventing the elevator from moving in the service floor when the elevator door 7 is open.

[0007] In the prior art 2, a structure is disclosed which includes a safety ring coupled to the elevator shaft wall at a certain interval, a shock absorber triggering device which is installed on the upper side of the elevator car and operates with the aid of a speed regulator signal, a shock absorber which moves toward the side of the safety ring with the aid of the shock absorber triggering device when the elevator car is overspeeding, and a shock absorber ring which is installed at the upper end of the shock absorber and is coupled to the safety ring when the shock absorber moves toward the side of the safety ring to thereby stop the elevator car. This technology can prevent the fallen elevator car from falling into the elevator shaft when the elevator car falls rapidly from a high floor, and can instead safely stop at the closest safety ring installation position among the safety rings installed on the elevator shaft at certain intervals, thereby preventing safety accidents from occurring in advance.

[0008] In the prior art 3, an elevator safety device is disclosed that can quickly detect a failure of a braking device and perform emergency braking, thereby ensuring the safety of passengers.

[0009] In the prior art 4, an elevator emergency stop device is disclosed, which does not require complex control and can alleviate the deceleration during braking action through a simple structure to avoid causing discomfort to passengers or damage to the lifting body or counterweight body. The device includes a lifting body that is lifted and lowered along a guide rail and is equipped with a lifting elevator car for passengers to ride and a frame for supporting the lifting elevator car, a wedge installed on the lifting body and moving upward along the guide rail relative to the lifting body in an emergency, and a pressurizing body that uses an elastic component to pressurize the wedge against the guide rail. The device also includes a technology of a pressure adjustment component that reduces the pressure of the wedge when the load mass of the lifting body that changes according to the entry and exit of passengers increases, and increases the pressure of the wedge when the load mass of the lifting body decreases.

[0010] As shown in the above-mentioned prior art, the braking device of an elevator is directly related to the safety of the user. Therefore, technologies for improving its safety in various ways have been proposed. However, there is still a need to develop a technology that can not only further reduce the risk of accidents and ensure safe entry and exit, but also simplify the structure and improve durability while taking into account the load that the elevator needs to withstand.

[0011] In particular, when loading or unloading heavy objects from an elevator car, if the elevator car's position differs by more than 20 mm relative to the floor of the stopping floor due to the extension or recovery of the traction rope, regulations require that the large winding motor located in the upper machine room of the elevator be driven at a micro-speed to maintain the car level with the floor. Frequent operation of the large winding motor in this manner not only leads to low efficiency but also to motor failure, which can be a major factor in compromising elevator stability. Summary of the Invention

[0012] Purpose of the Invention

[0013] Therefore, the object of the present invention is to solve the above-mentioned problem and provide a clamping device for an elevator guide rail, comprising: a housing, which is equipped with a receiving portion for a guide rail installed on the elevator shaft and is coupled to the elevator car; a cylinder, which is equipped with the housing; and a clamp, which fixes the guide rail when the door is opened by the cylinder; thereby stably fixing the elevator car when users enter and exit and thereby ensuring its safety, especially when heavy equipment such as a forklift enters the elevator car, it can also be firmly fixed to prevent the elevator car from falling or rising instantly.

[0014] In particular, another object is to provide a clamping device for an elevator guide rail, which can increase the pressing force on the guide rail by forming a rounded portion at the front end of the plunger of the cylinder used to push the clamp forward.

[0015] Furthermore, another object is to provide a clamping device for elevator guide rails, by further introducing an elastic component between the clamp and the plunger. Even if one side of the plunger that pressurizes the guide rail is first pressed against, the elastic force can be used to prevent the pressing force from being transmitted first, thereby ensuring that the clamps on both sides of the guide rail transmit the pressing force to the guide rail at the same time.

[0016] Technical Solution

[0017] In order to achieve the above-mentioned object, the clamp device for an elevator guide rail according to the present invention is characterized in that it includes:

[0018] The outer shell is coupled to the elevator car and is formed with a receiving portion shaped to be installed in the form of a guide rail on the elevator shaft;

[0019] a cylinder, mounted on the housing and equipped with a plunger that moves forward and backward along the guide rail; and

[0020] The clamp is provided in front of the cylinder and has an insertion space portion formed therein for the front end of the plunger to be introduced. The guide rail is pressurized by the forward movement of the plunger.

[0021] Beneficial effects

[0022] The clamping device for the guide rail for an elevator according to the present invention as described above can prevent the elevator car from shaking when heavy equipment such as a forklift enters the elevator, especially from instantly falling and moving the elevator car due to the extension of the rope supporting the elevator car, by means of a shell that is coupled to the elevator car and is equipped with a receiving portion for the guide rail to pass through, and a clamp that is equipped on the shell and pressurizes and fixes the guide rail equipped on the elevator shaft through a cylinder. This can prevent the elevator car from shaking when heavy equipment such as a forklift enters the elevator, and especially prevent the elevator car from instantly falling and moving due to the extension of the rope supporting the elevator car, thereby improving its sense of stability and preventing accidents in advance.

[0023] Furthermore, by using a hydraulic cylinder, the guide rails can be pressurized and fixed with a strong pressure, thereby preventing the elevator car from lowering due to the stretching of the ropes installed on the elevator car when loading heavy objects such as forklifts into the elevator delivery box when the elevator is stopped, further eliminating the fear and anxiety of the operators, and preventing unforeseen accidents, thereby improving safety.

[0024] In addition, for the plunger of the cylinder and the clamp that advances together by adhering to the front end of the plunger and pressurizes and fixes the guide rail, the pressure in the forward direction can be transmitted more stably by forming a circular portion at the front end of the plunger and a curved surface portion that adheres to the circular portion at the rear end of the clamp.

[0025] Furthermore, by further introducing an elastic component between the clamp and the plunger, even if one side of the plunger that pressurizes the guide rail is pressed first, the elastic force can be used to prevent the pressure from being transmitted first, thereby ensuring that the clamps on both sides of the guide rail transmit the pressure to the guide rail at the same time, and thereby preventing the guide rail from bending or breaking due to the pressure transmitted from a certain direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a semi-projected horizontal cross-sectional view of the clamping device according to the present invention.

[0027] Figure 2 is a semi-projected side view of the clamping device according to the present invention.

[0028] Figure 3 yes Figure 2A semi-projected enlarged view of the cylinder and clamp shown in FIG.

[0029] Figure 4 is a hydraulic circuit diagram of the clamping device according to the present invention. DETAILED DESCRIPTION

[0030] The present invention will now be described in detail with reference to the accompanying drawings. The present invention may be modified and implemented in a variety of different forms, and implementation examples (aspects) (or embodiments) will be described in detail in the text below. However, this is not intended to limit the present invention to the specific disclosed forms, but rather should be understood to encompass all modifications, equivalents, and even substitutes within the spirit and technical scope of the present invention.

[0031] In the various drawings, the same reference numbers, especially the same tens digit and units digit or the same tens digit, units digit and letters, represent the same or similar parts. Unless otherwise explicitly mentioned, the parts referred to by the various reference numbers in the drawings can be understood as parts that comply with the said reference.

[0032] In addition, the size or thickness of the components in each drawing may be exaggerated (or thickened) or reduced (or thinned) or simplified for ease of understanding, but this should not be construed as limiting the scope of protection of the present invention.

[0033] The terms used in this specification are only used to illustrate specific implementation examples (aspects) (or embodiments) and are not intended to limit the present invention. Unless the context clearly indicates otherwise, singular statements also include plural meanings. In this application, terms such as "including" or "consisting of" are only used to indicate the existence of features, numbers, steps, actions, constituent elements, parts, or the combination thereof described in the specification, and should not be understood as excluding in advance the possibility that one or more other features, numbers, steps, actions, constituent elements, parts, or the combination thereof may exist or be added.

[0034] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meanings as those commonly understood by persons having ordinary knowledge in the technical field to which this invention belongs. Commonly used terms defined in dictionaries should be interpreted as having a meaning consistent with the context of the relevant technology and should not be interpreted as having an overly idealized or exaggerated meaning unless explicitly defined in this application.

[0035] According to the present invention, the clamping device D for the guide rail of an elevator is equipped on the elevator to prevent the elevator from shaking when entering or exiting. Even when heavy equipment such as a forklift enters the interior of the elevator car when the elevator car is stopped, the guide rail GR can be clamped stably and firmly. The clamping device D includes a shell 10 equipped on the elevator car, a cylinder 20 equipped on the shell 10, and a clamp.

[0036] In this specification, the case of heavy equipment such as a forklift entering is used as an example, but it also includes the case of loading extremely heavy goods, i.e. "heavy objects", into the interior of the elevator car, and this cannot be used to make a restrictive interpretation of the scope of the claims.

[0037] First of all, an elevator is composed of cables or ropes and an elevator car that is raised and lowered in an elevator shaft by a counterweight. In order to guide the raising and lowering of the elevator car, a guide rail GR is usually provided in the vertical direction on the elevator shaft and a guide shoe is provided upward from the elevator foot to accommodate the guide rail GR.

[0038] Furthermore, as is well known, the guide rail GR is composed of a fixing portion GR1 fixed to the wall of the elevator shaft and a guide rail portion GR2 protruding from the fixing portion GR1 in order to be guided by a guide shoe provided on the elevator car.

[0039] Next, we will first refer to Figure 1 as well as Figure 2 The housing 10 will be described in detail. The housing 10 can be provided on one side or both sides of the elevator car or on three walls except the door.

[0040] The housing 10 includes a frame 131, a guide rail space 133 formed in the center of the housing for accommodating the guide rail portion GR2, cylinder support portions 13 symmetrically arranged about the guide rail space 133 and mounted on the housing frame 131, a cylinder 20 supported by the cylinder support portion 13, and a clamp 30, thereby forming a clamping unit 12. Furthermore, a hydraulic unit 11 is integrally coupled to the upper portion of the clamping unit 12. The hydraulic unit 11 includes a separate drive device that drives the cylinder of the clamping unit 12 in conjunction with the opening and closing operation of the elevator car door.

[0041] The hydraulic unit 11 is as follows Figure 1 as well as Figure 2As shown, the cylinder 20 is equipped with a pump P and a driving motor M for supplying fluid to the cylinder 20, and is also equipped with a check valve M1, a pressure gauge M2, an ON / OFF valve M3, a pressure switch M4, an accumulator M5 and a relief valve M6. The cylinder 20 is composed of a hydraulic cylinder 20, thereby transmitting the hydraulic force to the clamp 30.

[0042] The check valve M1 is used to protect the movement of the cylinder 20, and the accumulator M5 is a device for storing hydraulic pressure, which can maintain the pressure of the fluid supplied to the cylinder 20 even when a small amount of oil leakage occurs in the hydraulic circuit.

[0043] Figure 4 : This is a hydraulic circuit diagram of the hydraulic unit drive device (pump P, drive motor M, check valve M1, pressure gauge M2, ON / OFF valve M3, pressure switch M4, accumulator M5, and relief valve M6) according to the present invention.

[0044] Upon receiving a stop signal from the elevator car, the drive motor M is turned on, and the plunger of the cylinder 20 advances to clamp the guide rail GR. When the set pressure is reached, the pressure switch M stops the pump P, halting the fluid supply to the cylinder 20. The check valve prevents backflow of fluid already flowing into the hydraulic circuit, maintaining the set pressure. At this point, the present invention utilizes an accumulator M5, allowing the hydraulic oil stored therein to clamp the guide rail GR for an extended period of time.

[0045] Next, the release mechanism of the clamping device will be described. When the ON / OFF valve receives a signal from the elevator car door closing and switches to the open state, the hydraulic oil compressed in the hydraulic circuit is released into the oil tank. As a result, the clamp, which is pressurizing the guide rail GR, returns to its original position, the clamping standby position, by virtue of the force of the return spring (described later).

[0046] The present invention can clamp or release the guide rail GR according to the door opening or closing signal through the structure as described above, thereby preventing the elevator car from shaking during entry and exit and thereby ensuring its safety. Especially in the case of a change in weight caused by heavy equipment such as a forklift entering the elevator car or loading heavy objects in a stopped state, the clamping unit according to the present invention can also be used to firmly clamp the guide rail to prevent the elevator car from shaking.

[0047] Next, we will refer to Figures 1 to 3The main features of the present invention, namely, the air cylinder 20 and the clamp for pressurizing and fixing the guide rail GR, will be described in more detail.

[0048] First, the clamp and the cylinder are as follows Figures 1 to 3 As shown, they are simultaneously equipped on both sides of the guide rail GR and are divided into two or three sections along the up and down direction (the drawings illustrate the situations where they are respectively equipped on the upper and lower parts, but the scope of the claims of the present invention is not limited thereto), so that the guide rail GR can be stably pressurized and fixed. Specifically, for the two clamps 30 installed on both sides of the guide rail GR in a manner facing each other, the two cylinders 20 arranged along the up and down direction will pressurize the two clamps respectively, thereby increasing their pressurizing force and ensuring stability during pressurization.

[0049] For reference, in order to facilitate the description of the operation of the clamping unit 12 in this specification, the direction of movement of the plunger 23 toward the accommodating portion 133 that accommodates the guide rail GR is used as a reference, and the direction in which the plunger 23 moves toward the accommodating portion is referred to as the front, and the opposite direction is referred to as the rear.

[0050] Furthermore, guide shoes are typically installed in the guide rail space of an elevator car through which the guide rails GR pass, a generally known technical feature. However, in addition to these known guide shoes, the housing of the clamping device according to the present invention also includes rollers R that rotate idly at a slight distance from the guide rails GR. The rollers R in the clamping device of the present invention include four rollers that adhere to the upper and lower sides of the guide rail portion GR2 of the guide rail GR, respectively, and a roller installed on the side opposite the fixed portion GR1 of the guide rail GR, for a total of five rollers. Together with the known guide shoes installed in the elevator car, these rollers further ensure long-term and quiet elevator operation. Furthermore, multiple support rods 132 are installed on the cylinder support portion 13, which not only ensures more stable mounting of the cylinder 20 and clamp 30 but also enhances their durability through the use of reinforcement ribs.

[0051] First, the cylinder 20 is mounted on the cylinder support portion 13 of the housing 10 , and includes a housing 21 having a working portion 212 formed therein and a plunger 23 that moves forward in the working portion 212 by hydraulic pressure.

[0052] The cylinder 20 can forcefully advance the plunger 23 using hydraulic pressure supplied by the pump P, and the housing 21 is securely fixed to the cylinder support 13. Furthermore, a connection portion 131a is formed on one side of the housing 10, namely, the cylinder support 13, which constitutes the housing 10. This connection portion connects to the fluid transfer passage PR, allowing fluid supplied from the pump P to flow into the cylinder 20. Furthermore, an inflow hole 211 is formed in the housing 21, communicating with the connection portion 131a and supplying the inflowing fluid to the operating portion 212 housing the plunger 23.

[0053] A corresponding connection portion is formed on the hydraulic unit 11 coupled to the clamping unit 12 at a position corresponding to the connection portion 131 a .

[0054] When the fluid is supplied to the working part 212, the fluid will push the rear end of the plunger 23 equipped on the working part 212 to advance the plunger 23. At this time, a notch groove 235 is formed at the rear end of the plunger 23 to ensure that the pressure is transmitted to the rear end of the plunger 23 with uniform force.

[0055] In addition, in order to enhance the adhesion with the inner wall surface of the housing 21 and prevent fluid leakage, it is preferable to further equip the outer side surface of the plunger 23 with one or more sealing components.

[0056] The plunger 23 of the air cylinder 20 moves forward along with the supply of fluid, and pushes the clamp forward with the force of the movement, so that the approach of the clamp 30 does not pressurize the guide rail portion GR2 of the guide rail GR.

[0057] As shown in the figure, the clamp 30 has an insertion space 31 formed at the rear end thereof into which the front end of the plunger 23 can be introduced, and a flat contact portion formed at the front end thereof for contacting the rail portion GR2 of the guide rail GR.

[0058] Furthermore, as described above, since the one clamp is pressurized in the vertical direction by the two air cylinders 20 , two intervening spaces 31 spaced vertically apart are provided at the rear end of the clamp.

[0059] Next, the shapes of the plunger 23 and the interposed space 31 will be described in more detail. The front end of the plunger 23 is not cylindrical, but rather has a circular portion 231 formed on the outer side surface, with the diameter gradually decreasing toward the front end. A curved portion 33 corresponding to the shape of the circular portion 231 is formed on the wall of the interposed space 31.

[0060] Therefore, by means of the interaction between the circular portion 231 of the plunger 23 and the corresponding curved portion 33 of the clamp 30, the pressing force of the plunger 23 will be transmitted in the correct direction along the central axis of the inserted space portion of the clamp 30, and the pressing force can be transmitted to all directions more stably and the force can be dispersed, thereby fixing the guide rail GR more firmly and safely.

[0061] If the rear end of the clamp is flat and the front end (front) of the plunger 23 is flat, the action of the clamp being gradually and slowly pressurized when the plunger 23 moves forward is the same as the action of the plunger 23 equipped with a circular portion 231 and the plunger 30 equipped with a corresponding curved portion 22 of the present invention. However, unlike the present invention, the pressure will only be transmitted in a straight line direction to the part that is in close contact with the plunger 23, so that the force cannot be evenly transmitted to the surface of the guide rail GR, and when the plunger 23 moves forward, there may also be slight errors in the position of the clamp 30 or the plunger 23.

[0062] In addition, when the plunger 23 is cylindrical and the interposed space portion 31 is also cylindrical, although the plunger 23 can accurately pressurize the rear end of the clamp 30, as described above, the force will only be transmitted in a straight line along the central axis of the interposed space portion 31, thereby causing the problem of excessive concentration of pressurizing force.

[0063] In contrast, the present invention forms a circular portion 231 at the front end of the plunger 23 and a curved portion 31 in the interpolated space portion 31, so that the force transmitted from the plunger 23 is transmitted through the curved portion 33, thereby evenly transmitting the force to the clamp 30 and dispersing the force to one side of the guide rail GR, thereby further increasing the pressure.

[0064] At the same time, by further equipping the plunger 23 with an elastomer built-in portion 232 and further equipping the elastomer built-in portion 232 with an elastic component 37, elastic force can be further imparted between the plunger 23 and the clamp. At this time, the elastic component 37 can receive a supporting force, and a flat support portion 35 is formed in front of the curved portion 33 of the inserted space portion 31 and a rear end support portion 234 is formed in the elastomer built-in portion 232, so that the two ends of the elastic component 37 can be tightly attached to the flat support portion 35 and the rear end support portion 234 and receive a supporting force.

[0065] Therefore, under the elastic force of the elastic member 37 , a total of four rollers provided on both sides of the guide rail GR will receive the pressing force at the same time, so that the clamp 30 pressurizes and fixes both sides of the guide rail GR at the same time.

[0066] Specifically, even if one side of the clamp 30 contacts the guide rail GR first, the pressure will not be transmitted due to the elastic force of the elastic component. When fluid is supplied to the cylinder 20 and continues to move forward, the pressure will begin to be transmitted after the elastic component 37 is fully compressed, so that the clamp 30 can pressurize both sides of the guide rail GR at the same time.

[0067] Furthermore, by imparting a double elastic force with the aid of a return spring described later, the force of the cylinder 20 can be transmitted more perfectly at the same time.

[0068] Furthermore, in the present invention, when the hydraulic pressure supplied to the cylinder 20 is released, it is necessary to return the plunger 23 of the cylinder 20 to its original position, and for this purpose, a return unit 40 is further provided.

[0069] The reset unit 40 includes a reset component 43 protruding from one side of the housing 10 and passing through the housing 10 to be fixed to the clamp, and a reset induction spring 41 inserted outside the reset component 43 on one side of the housing 10 and supporting the outer side surface of the housing 10 and the end of the reset component 43.

[0070] That is, when the working oil compressed in the hydraulic circuit is released, the reset component 43 and the clamp connected thereto will retreat by virtue of the restoring force of the compressed reset induction spring 41, and when the clamp retreats, the plunger 23 of the cylinder 20 will return to its original position.

[0071] At this time, the elastic component 37 can also play another role. Specifically, in order for the plunger 23 to retreat, the fluid introduced into the interior of the housing 21 needs to be discharged, and there will inevitably be a difference between the reset speed of the reset induction spring 41 and the discharge speed of the fluid. Therefore, with the help of the compression of the elastic component 37, the speed can be matched and reset stably.

[0072] In the process of describing the present invention in the above content, the clamping device with a specific shape, structure and composition is mainly described with reference to the accompanying drawings, but the present invention can be modified, changed and replaced in various ways by relevant practitioners, and the modifications, changes and replacements mentioned above should be interpreted as being included in the scope of the claims of the present invention.

[0073] Industry availability

[0074] In addition, the present invention Figure 1 as well as Figure 2As shown, the housing 10 includes a clamping unit 12 equipped with the clamp 30 and the cylinder 20, and the hydraulic unit 11 equipped with a pump and an accumulator can be coupled to the upper portion of the clamping unit 12. The clamping device of the present invention constructed as described above can connect the hydraulic unit 11 and the clamping unit 12 via fixing bolts MB, thereby improving the convenience of maintenance. In addition, the two-stage structure can improve its space efficiency, allowing it to be installed in a minimum area.

[0075] Furthermore, by using a battery as a power source for driving the pump of the hydraulic unit 11, it can be used as an emergency brake device for urgently stopping the ascent and descent movement of the elevator during a power outage.

[0076] Furthermore, by equipping an oil ring OR around the inflow hole 211 of the cylinder 20 equipped with the clamping unit 12, fluid leakage can be perfectly prevented. Moreover, by equipping an oil ring OR at the connection portion of the fluid movement path between the clamping unit 12 and the hydraulic unit 11 when the clamping unit 12 is combined with the hydraulic unit 11, even in the case of a simple connection structure in which the clamping unit 12 and the hydraulic unit 11 are connected by bolts, the oil ring can be used to prevent oil leakage at the connection portion and improve the reliability of the equipment, thereby having very large industrial applicability.

Claims

1. A clamping device for an elevator guide rail, characterized in that: include: A housing (10) is provided on the elevator car and is provided with a receiving portion shaped like a guide rail for installation on the elevator shaft; A cylinder (20) is provided on the housing and is provided with a plunger (23) that moves forward and backward along the guide rail; and A clamp (30) is provided in front of the cylinder and has an insertion space (31) for the front end of the plunger to be introduced. The guide rail is pressurized by the forward movement of the plunger. in: The cylinder (20) and the clamp (30) are simultaneously provided on both sides of the guide rail; A curved circular portion (231) with a gradually decreasing diameter is formed at the front end of the plunger (23) of the cylinder (20). A curved portion (33) corresponding to the circular portion (231) at the front end of the plunger (23) is formed in the interpolated space portion (31) of the clamp (30), thereby being in close contact with the front end of the plunger (23). The circular portion (231) of the plunger (23) and the curved portion (33) of the clamp (30) are constructed so that when the plunger (23) moves forward, the curved surface of the circular portion (231) is tightly attached to the curved surface of the curved portion (33), so that the pressure of the plunger (23) is transmitted to all directions through the curved portion (33) and the force is dispersed, thereby evenly transmitting the force to the clamp (30) and dispersing the force to one side of the guide rail, so that the guide rail is pressurized and fixed more firmly and safely.

2. The clamping device for an elevator guide rail according to claim 1, characterized in that: A flat support portion is formed in front of the curved portion of the insertion space portion, and an elastic body built-in portion having a rear end support portion is provided on the plunger. It also includes an elastic component (37) which is introduced into the built-in portion of the elastic body and has both ends tightly attached to the flat support portion and the rear end support portion.

3. The clamping device for an elevator guide rail according to claim 1, characterized in that: One or more cylinders (20) are respectively provided on both sides of the guide rail.

4. The clamping device for an elevator guide rail according to any one of claims 1 to 3, characterized in that: The housing (10) further includes a reset unit (40) composed of a reset component (43) linked to the clamp (30) and a reset induction spring (41) inserted into the reset component to support the outside of the housing; When the pressing force of the cylinder (20) is released, the clamp (30) retreats with the aid of the reset unit (40), thereby causing the guide rail and the clamp to no longer be in close contact with each other.

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