KR20240032763A - Table lift fall prevention safety devices and braking methods and table lifts using them - Google Patents

Abstract

The present invention is a safety device and braking method of a table lift, and a technology related to a table lift to which the same is applied. The scissors 40, which lift or support the load on the top plate 70 by linking the horizontal movement 94 and the vertical movement 96, To prevent a fall accident that may occur when the table lift of a 41)-type structure loses the thrust supporting the top plate (70), it falls horizontally with the floor in the horizontal movement (94) area of the scissor-type structure. By configuring a preventive safety device and configuring the safety device and the braking device to operate in conjunction with each other at the moment of detecting a runaway that suggests a fall, the lift can be safely controlled in emergency situations and safety accidents related to vertical sudden descents can be prevented in advance. We present a table lift safety device and braking method to prevent falls, and a table lift to which it is applied.

Description

Table lift fall prevention safety devices and braking methods and table lifts using them {Table lift fall prevention safety devices and braking methods and table lifts using them}

The present invention is a safety device and braking method of a table lift, and a technology related to a table lift to which the same is applied. The scissors 40, which lift or support the load on the top plate 70 by linking the horizontal movement 94 and the vertical movement 96, 41) In order to prevent a fall accident that may occur when the table lift of a type structure loses the thrust supporting the top plate (70), the floor surface and the horizontal movement area (94) of the scissors type structure are provided. By configuring the fall prevention safety device horizontally and activating the safety device and the braking device in conjunction with each other as soon as a runaway that suggests a fall is detected, the lift can be safely controlled in emergency situations and safety accidents related to vertical sudden descents can be prevented in advance. This is a technical field regarding fall prevention safety devices and braking methods for table lifts, and table lifts to which they are applied.

A table lift is a heavy load vertical movement equipment that lifts or lowers a table carrying a heavy load by direct or indirect thrust by operating a scissor (40, 41) type structure in conjunction with horizontal and vertical movements.

Table lifts are commercialized in various types, including hydraulic type, electric cylinder type, rigid chain thrust type, and zipper chain thrust type, as well as classification according to type and purpose. Hydraulic table lifts are the most commonly used type, and the advantage of hydraulic type is that they can produce large forces, do not require separate lubrication devices, and have the advantage of being able to control force, speed, and direction. On the other hand, the indirect thrust method has the disadvantages of slow speed, inability to precisely control position, and oil is sensitive to temperature, so there is a large speed deviation in hot summer and cold winter, so there is a trend to switch to the direct thrust method of rigid chain or zipper chain. . The zipper chain table lift has high speed, easy device configuration, precise position control, is eco-friendly as it does not use oil, and is a direct thrust method that directly lifts the table. Compared to the hydraulic type, it has a longer lifespan, less damage to parts, and the chain is also more durable. It has the advantage of having a long lifespan.

Lifts are classified according to their shape into fixed, mobile, and flange types, and according to use, various table lifts are used, such as industrial, stage equipment, robotic auxiliary equipment, production automation lines, and electric assembly tables. There are no safety measures in place to account for collapse.

In a lift that carries a heavy object, a guide structure such as scissors (40) stably raises the table vertically (96).

Most table lifts have scissor-type (40, 41) supports symmetrically located on the table bottom (69) and top plate (70) to drive the table.

Unlike elevators in high-rise buildings, table lifts are telescopic devices that fold thinly and then unfold for a long time, making it difficult to construct safety devices. In addition, the average stroke distance of the device is within 1m to 3m, so the structure completely falls to the ground within 1 second when free falling.

A fall from a table lift refers to a phenomenon in which the table lift suddenly falls in the vertical direction, which means the collapse of the table lift.

The cause of a lift's collapse may be damage to the power transmission device that generates upward thrust, or it may be damage to the operating cylinder or actuator.

If the lift collapses due to various reasons, not only the items loaded on the lift may be damaged, but surrounding structures may be damaged due to secondary impacts, or casualties may occur in the surrounding area. Human and material damage to cargo, peripheral equipment, and work sites causes significant financial damage.

In order to prevent such damage in advance, the problem that the present invention aims to solve is to configure a safety device so that when a vertical drop phenomenon that suggests a fall of the table lift occurs, the runaway is detected using a runaway detection device and the braking device is immediately activated. .

In order to configure the safety device of the table lift as described above, the scissor (40, 41) type structure that lifts or supports the load on the top plate (70) by linking the horizontal movement (94) and the vertical movement (96) is explained as an example. do.

The table lift largely consists of an upper plate (70), a lower plate (69), and supports called scissor-type scissors (40, 41).

And in order to drive the table lift up and down (96), an operating cylinder (99) and a rigid chain (71) are configured as shown in the example pictures A and B of [FIG. 14] to vertically raise or lower the table.

Both ends of the scissor-type scissors (40, 41) formed between the upper plate (70) and the lower plate (69) are fixed to the base plate with a hinge (45), and one end can be slid by a roller or guide device. (41).

The end configured to slide moves horizontally (94) when the scissors move up and down.

The fall prevention safety device of the table lift is installed horizontally with the floor surface 69 in the horizontal movement area 94 of the scissor-type structures 40 and 41.

The above horizontal movement area (94) expands or contracts vertically when the scissors move horizontally based on the scissors. The movement of the scissors is centered around the central axis 74 of the scissors in [Figure 1].

This refers to a section in which the scissors fixing part 40 and the scissors driving part 41 have a Z area moving in the X direction in the example figure [A].

In [B] of the example figure [Figure 14], the horizontal movement (94) area is formed on all horizontal faults in the vertical movement section.

A horizontal fault refers to a cross section parallel to the floor (69) where horizontal movement (94) occurs, such as the floor surface (69), the intermediate guide plate (505), and the upper plate (70).

Simply put, as shown in Figure B of the example picture in [Figure 14], the horizontal movement (94) area is a safety device using horizontal movement (94) such as the bottom surface (69), the intermediate guide plate (505), and the top plate (70). It means a space that can be configured.

In the fall prevention safety device of a table lift, the linear motion (91), which is horizontal to the floor in the horizontal motion (94) area of the scissor (40, 41) type structure, is converted into rotational motion (90). Means 31 and 34, a sensing stopper 110 and elastic means 112 that monitor the speed of the converted rotational movement, high-speed rotation exceeding the support limit of the elastic means 112 and centrifugal force are generated (110-3) When the rotation is stopped, the detection stopper is driven (120), and when the rotation is stopped due to the operation of the detection stopper, the position change (98) of the rotation detection shaft (35) and the braking means (33, 75) using this act in conjunction with each other. They can be configured to work together.

In the configuration of the table lift runaway detection device, the detection device body 101 assembled on the traveling axis of the table lift, rotation conversion means 31 and 34 for converting linear motion of a parallel axis into rotational motion, and the rotation conversion means It consists of a linear member 31 with a parallel axis configured horizontally to the bottom surface 69 and at least one wheel 402 or at least one pinion 34 corresponding face to face, and the wheel 402 or pinion 34 ) is formed and rotates at least one rotation detection shaft 35, a rotation plate 122 configured on the rotation detection shaft 35, and a detection stopper 110 configured on the rotation plate are driven by centrifugal force, the rotation detection shaft 35 ) and a sliding member 222 that guides the stopped rotation detection axis 35 to slide along the guide 38 is formed on the detection device subcap 100 and the detection device base cap 101, Elastic means 32 for fixing the rotation detection shaft 35 in a certain position or controlling it to return to the original position, and at least one drive link 21 or at least one operating in conjunction with the sliding of the rotation detection shaft 35 It is made up of joint links.

The high-speed rotation detection stopper 110 using the centrifugal force is configured inside the detection body sub cap 100 and the detection body base cap 100 and 101, and includes a rotation detection axis 35 consisting of a rotation axis, and the detection body base cap. A rotary winch ring 105 configured at (101), the rotary winch ring 105 is configured as an assembled or integrated type in which at least one tooth groove 120, an uneven end, or a walled end is formed of a stop groove. It can be.

The detection stopper 110 in the form of a fingernail, which is composed of at least one groove 120 of the rotary winch ring 105 of the detection body base cap 101 and the corresponding rotation plate 122, is detected at one end. The stopper's rotation axis 106, spring 112, and pin 107 for fixing the spring 112 are configured to position the sensing stopper in a standby state (110-1). When centrifugal force rotating at high speed is applied to the rotation detection shaft 35, the detection stopper 110-3 acting in the outer direction of the rotation detection shaft 35 is a rotary winch ring configured in the detection device base cap 101. It engages with the groove 120 of (105) to force the rotation detection shaft 35 to stop.

When the rotation detection shaft 35 is stopped by the detection stopper 110-3 and the groove 120 of the rotary winch ring 105 engaging with each other (120), the detection device sub cap 100 and the detection device base cap 101 ) The guide member 222 configured in ) slides along the sensing body guide 38.

That is, the sensing means (K2) formed on the K2 axis 46 in [Figure 4], the sensing device base cap 101 of the sensing means (K2), and the guide member 222 formed on the sensing device Sub cap 100 and driven. It can be configured to slide along the sensing body guide 38 configured on the frame 19, and the guide can be composed of various members such as a linear guide, LM guide, ball bushing, or shaft guide. The elastic means for returning the sensing body caps 100 and 101 and the rotation sensing shaft 35 to their original positions may be made of at least one of elastic materials such as leaf spring, coil spring, magnetism, urethane, gas, and rubber. Axial support bearings 121 may be formed at both ends of the central axis of the rotation plate 122 on which the rotation sensing stopper 110 is formed.

The central axis of the detection body caps 100 and 101, the pinion 34 axis, the rotation detection axis 35, and the rotation plate 122 axis are separated and combined on the same axis or are integrated into one body guide (38). ) may be configured as an entity to move freely.

A runaway detection means (K2) using friction and inertial force may be configured.

A runaway detection device using friction and inertial force includes a rotating shaft 35 independently configured to slide with the driving frame 19, at least one auxiliary rotating shaft 36 configured in the driving frame 19, and the independently configured rotating shaft. A pinion gear 34 is disposed at (35), a pinion or tooth-type stopper is configured on the auxiliary rotation axis 36, and a rack gear 31 corresponding to the pinion 34 of the rotation axis 35, the rotation axis When a high-speed rotational force acts on the pinion 34 of (35), friction and inertial force exceeding the elastic means of the spring 32 act, and the independently configured rotation axis 35 detects the body guide 38 configured in the main body. It slides along, and the teeth of the pinion 34 of the sliding rotation shaft 35 and the pinion gear 37 of the auxiliary rotation shaft 36 engage and stop, and the potential energy generated at this time can be used to form a braking device.

In the above-mentioned centrifugal force detection stopper method, friction force, and inertial force detection stopper method, when a braking situation occurs due to a high-speed rotational force that suggests a fall, a control device is constructed to block the power source of the motor by installing a sensor on a part of the driving device. The power transmission device can be protected.

This means that the safety device brakes in response to runaway and at the same time, a sensor is installed to cut off driving power and make an emergency stop.

In the above, an acceleration/deceleration gearbox is separately installed on the rotating starting shaft and configured to input the accelerated/decelerated rotational force to the rotation shaft input end of the fixed body, so that the centrifugal force can be amplified or reduced to improve detection ability.

In the above, the rotation conversion means for converting the linear motion of the parallel axis into rotational motion is

It is characterized in that teeth of a constant pitch formed on a pinion of a rotating maneuvering shaft engage and rotate face to face in correspondence with teeth of a constant pitch formed on a linear member of a parallel axis.

Table lifts are used for various purposes such as lifting or moving heavy loads in various places such as production sites, industrial sites, construction sites, performance halls, and stage sets. Lifts with safety devices in mind have the effect of improving work efficiency by providing a safe workplace by improving the working environment at various sites, preventing safety accidents, and further improving work efficiency.

Figure 1 is a perspective view of a table lift equipped with a safety device according to an embodiment of the present invention.
Figure 2 is a perspective view of a table lift [B] equipped with a congestion detection device [A] and a braking device according to an embodiment of the present invention.
Figure 3 is a perspective view of a fall prevention safety device for a table lift according to an embodiment of the present invention.
Figure 4 is an exploded view of the driving detection means (K2) according to an embodiment of the present invention.
Figure 5 is a diagram showing the operation of driving the braking device by the operation of the driving link 21 applied to the present invention.
Figure 6 is an understanding of the operation of driving the braking device by the operation of the driving link 21 applied to the present invention.
Figure 7 is a diagram showing the operation of a centrifugal runaway detection device illustrating an example of application of the present invention.
Figure 8 is a diagram showing the operation of a runaway detection device and a braking device illustrating an example of application of the present invention.
Figure 9 is a side perspective view of a table lift illustrating an example of application of the present invention.
Figure 10 is an illustration and understanding of the wheel and pinion of the rotation conversion means in the example of the present invention.
Figure 11 is a perspective view of a fall prevention safety device illustrating an example of application of the present invention.
Figure 12 is a diagram showing the operation of a fall prevention safety device illustrating an example of application of the present invention.
Figure 13 is a perspective view of a table lift illustrating an example of application of the present invention.
Figure 14 is a perspective view showing an example of table lift application of indirect thrust [A], direct thrust [B], scissor single stage [A], and scissor multistage [B].
Figure 15 is a flowchart of a braking method using a fall prevention safety device for a table lift.

Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings.

These examples are only for illustrating the present invention in more detail, and can be used in combination by those skilled in the art to which the present invention pertains, and the scope of the present invention is limited to these embodiments according to the gist of the present invention. It will be obvious to those skilled in the art that it is not limited by .

There are various methods for lifting and thrusting (96) the top plate (70) of the table lift, such as scissors (40, 41), telescopic, and multi-stage linear guides. However, in explaining an example of using this technology, scissors (40, 41) ) is explained as an application example.

In other words, the scope of application of this technology is a technology that operates in conjunction with the horizontal movement 94 and the vertical movement 96 and can be applied to all devices that lift or lift objects on the top 70, and a table lift is an example of application.

[Figure 1] is a perspective view showing an embodiment in which a runaway detection device for a table lift of the present invention and a runaway braking device using the same are combined.

[Figure 1] The configuration of the example largely consists of a table lift, a sensing device that detects runaway of the table lift [Figure 4], and a braking device that prevents the lift from falling [Figure 8].

The scissors (40, 41) form a central axis (74) at the point where two large and small square frames are divided into two, and are combined with the upper plate (70) and lower plate (69) to operate in the form of scissors.

When the two squares rotate around the central axis 74 and get closer to the horizontal, they become the lowest height, and when they stand closer to the vertical, they become the highest height.

Two squares are assembled in the form of scissors with the central axis 74, one end is assembled with a hinge 45 on the main body, and a push-pull movement of pushing and pulling the other end is performed using the operating cylinder 99 or rigid chain ( 71) The actuator is combined and operated. The operating cylinder includes a hydraulic cylinder and an electric cylinder as shown in (99) in [Figure 14] and [A], and the actuator is powered by the rigid chain (71) in [Figure 14] and [B]. It is driven by a delivery device (80 in [FIG. 9[B]]).

The power transmission device consists of a motor and a reducer.

As shown in the above example, the structure in which two large and small squares are combined and operated on the central axis 74 is called scissors.

One side of the scissor of the table lift is fixed to the main body (40), and the other side (41) moves horizontally (94) along the guides (72, 73) to raise or lower the upper plate (70) vertically (96). .

The application example of this technology illustrates a minimum of one-stage scissors, but it can also be applied by configuring a multi-stage scissors as shown in [B of FIG. 14].

Multi-stage scissors refer to scissors forming a layer, and the links 40 and 41 forming the scissors are joined by hinges and hinge pins to form a multi-stage layer.

The scissor has two square frames, one side of which is fixed to the hinge (45) of the main body (69, 70), and the other side (41) moves horizontally along the guides (72, 73) formed on the upper plate (70) and lower plate (69). A roller may be configured to do (94).

The scissors 40 and 41 of the table lift of this example convert the horizontal movement 94 into vertical movement 96 and move the top plate 70.

The force that lifts the top plate of a table lift is called thrust, and the force that directly lifts the top plate using the rigid chain 71 as shown in [Figure 9] is called direct thrust, and the operating cylinder 99 as shown in [A in Figure 14] is called thrust. Lifting the upper plate 70 using a scissor-type operation is called indirect thrust.

The present technology has a scope of application that includes both direct thrust and indirect thrust.

As described above, the table lift directly or indirectly controls the top plate with a certain force to vertically rise and fall (96), but if the thrust to lift the top plate (70) is lost, the top plate instantly falls to the floor.

At this time, free falling is called a vertical plunge and runaway phenomenon, and the loss of thrust can be caused by various reasons, such as damage to the power transmission shaft, damage to the reduction gear, and damage to the thrust rigid chain 71.

The steep descent of the lift means that the scissor driving unit 41 moves horizontally (94) at high speed along the guide (72).

The state in which the upper plate 70 rapidly moves 96 to the floor 69 means that the unfolded lift device is quickly folded, and at this time, the scissor means that the fixing part 40 and the driving part 41 are in a horizontal state. it means.

Conversely, when the scissor fixing part 40 and the driving part 41 are erected vertically, the upper plate 70 and the lower plate 69 are stretched to the maximum length, and the scissor fixing part 40 and the driving part 41 maintain the minimum distance. I do it.

That is, the moving distance of the upper plate 70 and the lower plate 69 is proportional to the moving distance of the scissor hinge 45 fixing part and the driving part 41, and the moving speed of the upper plate 70 and lower plate 69 is the scissor hinge ( 45) It is proportional to the moving speed of the fixed part and the driving part 41.

In other words, the conclusion is that if the upper plate moves quickly vertically (96), the traveling axis (77) of the scissors also moves quickly horizontally (94).

A roller 79 is attached to the scissor travel axis 77 in the above example so that it can easily travel horizontally along the guide 72.

[Figure 2] is a perspective view showing an example of daily use of a lift with the safety device assembled (A-3), [A] is an enlarged example of the detection means (K2), and [B] is an example of the lift with the safety device assembled (A-3). 3) This is a perspective view of the table lift.

Guide rollers 79 or guide members are directly or indirectly coupled to both ends of the traveling shaft 77, and a driving frame 19 that detects runaway is formed on a portion of the traveling shaft 77, and the driving frame ( 19), such as a sensing means (K2), a sensing device subcap 100, a sensing device base cap 105, a driving link 21, a pinion 34, and an auxiliary pinion 37 of the sensing means (K2). At least one pinion 34 may be configured.

In the example of [FIG. 2], when the running axis 77 in horizontal movement 94 runs away, which suggests a fall, the driving frame 19 coupled with the driving axis 77 and the pinion 34 configured in the driving frame are It moves horizontally along the straight rack gear 31 at high speed, and at this time, the pinion 34 corresponding to the rack gear 31 converts the linear motion into rotational motion.

[FIG. 4] is an example of an exploded view of the sensing means (K2) configured in the driving frame 19, and can be referred to as the pinion 34 and the driving link 21, or the driving arm, corresponding to the rack gear 31. There is a detection device sub cap (101), a detection device base cap (101), a rotary winch ring (105), a bearing, a rotation plate (122), a pinion (34), a rotation detection shaft (35), and a detection stopper (110). ), a spring 112, a guide member 222, and a sensing stopper groove 120 formed on the rotary winch ring 105.

In the example of [FIG. 4], the pinion 34 consists of at least one pinion 34, and the pinion 34 is coupled to the rotation detection shaft 35 to rotate the rotation plate 122.

The example in [FIG. 7] is an operational understanding explaining the operation of the detection stopper 110 by centrifugal force. The central rotation detection shaft 35 rotates in combination with the rotation plate 122, and the rotation plate 122 has at least one or more It consists of a detection stopper 110 and a corresponding spring 112, spring fixing pins 107 and 108, and a detection stopper rotation axis 106.

The direction of rotation of the sensing stopper can be changed at any time by assembling the rotary winch ring 105 by turning it over or assembling the sensing stopper 110 in the opposite direction.

When the pinion 34 rotates at a normal speed, the detection stopper 110 maintains a stable position due to the tension of the spring 112, but when a high-speed rotational force occurs on the rotation axis, the detection stopper 110 is attached to the spring 112. ) is applied by a centrifugal force exceeding the elastic limit, and at that moment, it engages with the hook-shaped groove 120 formed on the rotary winch ring 105, stops rotating, and enters a locked state 120.

When the pinion 34 is in the locked state 120, as in the example of [FIG. 5], the driving shaft 77 is attached to the driving axis shaft connection hole 78 to strongly move the driving frame 19 in the horizontal direction 91. When pushed, the pinion (34) is locked and does not rotate, but moves along the sensing body guide (38) in place. That is, the rotation sensing axis 35 is in a stationary state and the driving frame 19 moves by the distance configured in the sensing body guide 38.

At this time, the sensing body guide 38 is linked along the guide slot 24 formed in the driving link 21 and rotates (97) and moves (98) around the rotation axis (23) of the driving link (21).

That is, when the sensing stopper 110 is in the locked state 120 by centrifugal force, the pinion 34 stops with its teeth meshing with the rack gear 31, and the driving frame 19 is driven when moving forward 91 at high speed. The link 21 rotates 97 around the rotation axis 23, and at this time, the second drive shaft 20 is coupled to the second shaft attachment hole 17 and moves in the direction indicated by symbol 95. do.

To explain this, in the example illustration [Figure 6] showing a cross-section as a 3D example, when the driving frame 19 moves forward at high speed in the direction (91) due to a vertical plunge and runaway phenomenon,

The pinion 34 rotates (92) at high speed in the counterclockwise direction (90), and the sensing stopper (110) of the rotating plate (122) connected to the same axis rotates outward (110-3) by centrifugal force, and the sensing device It engages with the groove 120 formed in the rotatable position ring 105 formed in the base 101.

At this time, the pinion 34 stops rotating and enters the locked state 120, and when the drive link 21 rotates 97 around the drive link rotation axis 23, the second drive connected to the drive link 21 The shaft 20 is driven.

In the operation example described above [FIG. 8], when the drive link 21 rotates (97) about the drive link rotation axis 23, a claw-type drive stopper ( 33) is rotated, and the claw-type drive stopper 33 engages with the triangular tooth groove formed on the tooth-shaped stopper plate 75, causing sudden braking.

The sawtooth stopper braking device described in the above example is an example of applied technology, and is a cam type that configures the braking device in a way that the tapered cam and the rail surface are locked, and the tapered gib (GiB) is engaged with each other to provide a strong clamping force. The braking device can also be configured with arbitrary friction force.

In other words, the braking means, which is a method of implementing the braking device, is a serrated stopper locking method using the driving link 21, and a cam that places a circular eccentric cam on the rail surface and engages and locks the rail surface using the driving link 21. Locking method, ladder type with a taper. It can also be configured as a tapered inclined surface locking method in which a block with a square inclined surface engages strongly along the tapered surface during braking to lock the rail.

Additionally, an electromagnetic brake using the actuation of the drive link 21 and a disc brake system configured with a disc brake device on the rail surface using the drive link 21 may also be used.

As shown in the example in [FIG. 2], the braking means may be configured left and right symmetrically around the driving frame 19 formed at the center of the traveling axis 77.

The pinion (34) is configured symmetrically on the left and right sides of the driving frame (19), and the rack gear (31) engaging with the pinion (34) is configured symmetrically on the floor in the direction of the horizontal progression (94) of the scissors (40, 41). You may.

The sawtooth stopper plate 75, which is a braking means, can also be configured symmetrically to produce a stable force distribution effect.

To absorb the shock generated when the claw-type drive stopper (33), which is a braking means, suddenly brakes,

The end portion of the toothed stopper plate (75) corresponding to the claw-type drive stopper (33)

That is, an elastic device or a shock absorber is arranged and assembled on the end surface in the longitudinal direction of the plate 75, where shock is collected during braking, to alleviate the shock generated during braking.

[A] and [B] in [FIG. 10] are illustrations of a method for converting horizontal movement 94 into rotational movement and are examples explaining the rotation conversion means.

[A] in [FIG. 10] illustrates a horizontal rail 400 and a rotating wheel 402 that rotates in response to the horizontal rail 400 face-to-face. This technology can be applied by maximizing the friction force by applying rubber, urethane, or special paint to the outside of the wheel that rotates while rubbing face to face on the horizontal rail 400.

[B] in [FIG. 10] is a description of the rack gear 502 and the pinion 502 corresponding to the rack gear described as an application example of this specification. When the pinion 502, which rotates around the rotation axis 501, advances and rotates horizontally (504), the teeth of the rack gear 500 and the teeth of the pinion 502 engage and rotate, generating a strong rotational force without being pushed or rotated. It rotates.

A and B in [FIG. 10] are important parts of the present invention that convert horizontal motion into rotational motion, and these rails, wheels, racks, and pinions are called rotation conversion means.

The rotation conversion means may be configured by bonding a timing belt to a rail and forming a timing pulley as a rotating shaft. After wrapping the wire around a rotating roller at least one turn and fixing the wire in the horizontal direction, when the rotating body moves forward and backward, the roller is connected to the wire. It may be configured with a rotation converter so that it can rotate in conjunction.

[FIG. 11] shows the driving frame 19 formed at the center of the traveling axis 77, with a rack gear 31, a pinion 34, and an auxiliary pinion 37 disposed on the left and right, and a claw-type braking device. This is an application example in which the drive stopper 33 and the tooth-shaped stopper plate 75 that engages and brakes the claw-type drive stopper 33 are disposed at the exact center.

In the figure, the pinion 34 is configured with a sliding device so that it can move along the sensing body guide 38, and an elastic means 32, that is, a spring 32, is configured to restore the original position after movement, and the pinion 34 A rotation plate 122 and a detection stopper 110 are formed on the rotation axis 35, and during high-speed rotation, the detection stopper 110 is activated when the locking device 120 is activated by centrifugal force and the pinion 34 is stopped. The driving force of the frame (19) continues to move forward, and when the pinion (34) slides along the sensing body guide (38), the pinion (34) and the auxiliary pinion (37) come into contact and their teeth engage, and at this time, the driving frame (19) The movement stops. When the operation stops as described above, the driving shaft 77 coupled to the driving frame 19 pushes the claw-type drive stopper 33 along the driving axis guide 30, and the claw-type drive stopper 33 moves the pinion ( When it is rotated and positioned around the rotation axis (37) into the empty space where 34) is located, the teeth of the claw-type drive stopper (33) engage with the groove of the tooth-type stopper plate (75), causing sudden braking and stopping by the spring (22). It is restored to its original position.

The position restoration spring is an application example and the installation location may be changed.

The claw-type drive stopper (33) is configured to be restored to its original position by the elastic means (22) after operation, and the restoring force is installed at a certain position on the operating members (21, 20) by adjusting the strength and weakness according to the thickness and length of the elastic means. .

The above elastic means may use elastic materials having excellent tensile force, contractile force, and restoration force, such as springs, spring plates, rubber, and urethane.

The feature of this device is that the claw-type drive stopper (33) is activated and braked by engaging the pinion (34) and the auxiliary pinion (37) and sliding the traveling axis (77) without using the drive link (21). .

In the above, the rack gear 31 and the pinion 34 are rotational motion conversion means that convert horizontal motion into rotational motion, and in addition to the above means, wires, rollers, timing belts and pulleys, chains and sprockets, wheels, rails, wheels, and A rotational motion conversion means for at least one of the rollers may be applied.

[Figure 12] shows when the pinion 34 and the auxiliary pinion 37 described in the above example are configured.

The pinion 34 is configured to slide along the sensing body guide 38, and the auxiliary pinion 37 is configured to be fixed and rotated on the auxiliary pinion rotation axis 36.

In the example [A] of the picture, when the pinion (34) is locked by the driving of the sensing stopper (110), it stops rotating and slides along the sensing body guide (38), and as shown in the example [B] of the picture, the pinion (34) and the auxiliary pinion (37) engages with each other and stops.

[Figure 13] is a diagram showing an example of the sensing device and braking device of [Figure 11] applied to a table lift.

A in [FIG. 14] is a pictorial representation of an example applied to a lift indirectly thrust by a hydraulic cylinder 99, and in [FIG. 14] is a scissors operated by direct thrust of the rigid chain 71 arranged in multiple stages. This is an illustration showing an example applied to a table lift.

In the configuration of the runaway detection device configured in part of the main body of the table lift, the driving frame 19 is coupled to the traveling axis 77 of the table lift, and the linear movement 94 of the traveling axis 77 is converted into rotational movement 90. Rotation conversion means (31, 34) for converting the rotation, a rotation detection shaft (35) for transmitting the rotation movement to the rotation plate (122) of the detection body cap (100, 101), and a detection stopper (110) configured on the rotation detection shaft (35). ), when runaway occurs, the detection stopper 110 leaves its position due to centrifugal force and is caught in the detection stopper groove 120 formed on the rotary winch ring 105. When detected, the rotation detection shaft 35 is stopped and the Guide members 38 and 222 formed on the fixed body 19 and the detection main body 200 so that the stationary rotation detection axis 35 can slide and move, fixing the rotation detection axis 35 at a certain position or returning it to the original position. It may be composed of an elastic means 22 that controls the rotation and at least one drive link 21 that operates in conjunction with the sliding of the rotation detection shaft 35. Additionally, the drive link 21 may be configured with at least one joint link.

When the drive link 21 operates, the second drive shaft 20 operates in conjunction with it and is braked by a braking means connected to the second drive shaft.

The braking means is a stopper type in which a toothed stopper plate (75) consisting of a toothed triangle at a constant pitch and a claw-type driving stopper (33) engage with the tooth groove to brake, and a trapezoidal block and a tapered block on the guide rail are based on the inclined plane. When the tapered blocks are assembled together and adhered closely along the slope by the drive shaft, a braking device can be formed using the strong friction force where the tapered blocks adhered to the slope engage with the rail.

The runaway detection means (K2) using centrifugal force includes a detection body cap (100, 101) constituting the device, a rotation detection shaft (35) consisting of a rotation axis, a rotary winch ring (105) comprised in the detection device base cap (101), At least one sensing stopper groove 120 is formed inside the rotary winch ring 105, and the rotary winch ring 105 is integrated with the main body or is configured to be assembled, and the sensing device base cap 101 ) of the detection stopper groove 120 and the corresponding rotating plate 122, and at least one claw-shaped detection stopper 110, when a high-speed rotation phenomenon occurs on the rotation detection shaft 35. Centrifugal force acts on the fingernail-shaped detection stopper 110, so that the detection stopper 110, which protrudes outward around the detection stopper rotation axis 106, is located inside the rotary winch ring 105 of the detection device base cap 101. It engages with at least one detection stopper groove (120) to force the rotation detection shaft (35) to stop, and when the rotation detection shaft (35) is stopped, the detection body (100, 101), pinion (34), and rotation detection combined with the axis are detected. The shaft 35 is composed of a sliding guide member 222 configured to slide along the sensing body guide 38 and a pinion position restoration spring 32 that returns the starting shaft to its original position, and the rotation sensing shaft 35 rotates. ) are configured at both ends of the pinion 34 and a shaft bearing 121 that supports the axis of the rotating plate 122 to drive the sensing stopper 110 during high-speed rotation.

When the detection stopper 110 is driven, the detection stopper 110-3 is engaged with the detection stopper groove 120, as shown in B of [FIG. 7].

As the pinion 34 corresponding to the rack gear 31 rotates and monitors the rotation speed, an acceleration/deceleration gearbox is separately installed on the rotation detection shaft 35 and the input terminal of the rotation shaft 35 of the detection device base cap 101. When the high-speed rotation is not sufficient or the rotation is performed at high speed and the rotational force is to be reduced, the acceleration/deceleration device can be configured separately to improve detection ability by amplifying or reducing the centrifugal force. .

In the fall prevention safety device (A-3) of a table lift, a linear movement (91) composed horizontally with the floor (69) surface in the horizontal movement (94) area of the scissor (40) type structure is performed as a rotational movement (90). It consists of a rotational motion conversion means (31, 34) and a driving frame (19) that converts to responds to high-speed rotation, and the operating members (20, 21), which operate in conjunction with the sensing means (K2) detected by the centrifugal force, are configured to operate in conjunction with the braking means (33, 75) to prevent the table lift from falling. It can be configured to

In the above, the operating member is configured to slide using a slot groove, guide groove, or guide member to link the axis of the sensing means with the driving frame and the driving link when the sensing means (K2) changes position. Various members that use thrust to drive the braking means using members such as link joints, link arms, plates, yokes, and arms are called operating members.

In this specification, it is a device that drives the operating member in conjunction with the sensing body of the driving frame, and refers to a connected structure until the braking means is driven, and has a driving link 21 and a second driving shaft 20 as the basic structure.

The safety device is a drive frame (19) coupled to the traveling axis (77) that performs horizontal movement (94) of the scissor-type structure (40), and performs a linear movement (91) horizontal to the floor (69) surface and a rotational movement (90). ) is composed of at least one rack gear 31 that converts to ), and at least one pinion 34 corresponding face-to-face with the rack gear 31 is configured in a driving frame, and the pinion 34 is driven A detection stopper 110 and an elastic means 112 configured to rotate the rotation detection axis 35 of the frame 19 and monitor the speed of the rotation detection axis 35 are configured to rotate the rotation detection axis 35. It is configured on the plate 122, and when a vertical plunge suggesting a fall of the table lift occurs, the pinion 34, which rotates in response to the rack gear 31, rotates at high speed, and the pinion 34 connected to the rotation detection shaft 35 of the pinion The rotating plate 122 rotates at high speed, and the sensing stopper 110 formed on the rotating plate 122 rotates with centrifugal force and inertial force exceeding the support limit of the elastic means 112 and protrudes, and the protruding sensing stopper 110 When the grooves of the rotary winch ring (105) corresponding to -3) engage with each other (120) and stop rotating, and the rotation sensing shaft (35) stops rotating, the pinion (34) that rotates the rack gear (31) A position change 98 in which a rotation sensing shaft 35 that is braked and operated in conjunction with this slides along the guide members 38 and 222 formed in the drive frame 19, and a drive link operated in conjunction with the position change 98 ( 21) and the second drive shaft 20 can constitute a fall prevention safety device for a table lift, characterized in that it is configured to drive the braking means (33, 75).

In the above, when a vertical plunge suggesting a fall of the table lift occurs, a position detection sensor is configured on the rotation detection shaft 35 disposed on the traveling axis 77, or on an operating member that operates in conjunction with the position change, and the motor A fall prevention safety device for a table lift, characterized in that it is configured with a control device that blocks driving power to prevent overload.

In the above, an acceleration/deceleration gearbox is separately installed on the rotation detection shaft 35 of the driving frame 19, and an acceleration/deceleration gearbox is installed so that the accelerated/deceleration rotational force is input to the input terminal of the rotation plate 122 of the sensing device base cap 101. A fall prevention safety device for a table lift may be configured, characterized in that it improves detection ability by amplifying or reducing centrifugal force.

In a table lift equipped with a fall prevention safety device (A-3), a scissor (40) type structure of at least one stage is formed between the upper plate (70) and the lower plate (69), and the scissor (40) type structure is provided. An operating cylinder method that indirectly thrusts the upper plate by thrusting the structure, or a rigid chain method of direct thrust that directly lifts the upper plate (70) is configured, and the traveling axis 77 of the scissor type structure (40) and the traveling axis (77) ), a rotational motion conversion means (31,34) and a driving frame (19) for converting the linear motion (91), which is horizontal to the floor (69), into the rotational motion (90) are configured in the horizontal motion (94) area. The centrifugal force sensing means (K2) configured in the driving frame 19, the centrifugal force sensing means (K2) of the driving frame 19 reacts to high-speed rotation suggesting a fall of the table lift, and is detected as the centrifugal force. A table lift may be constructed, characterized in that a fall prevention safety device (A-3) consisting of operating members (20, 21) and braking means (33, 75) operated in conjunction with the sensing means (K2) is applied. .

In the table lift to which the fall prevention safety device (A-3) is applied, the table lift may be configured as a mobile type with wheels or a fixed type that is fixed or placed on the floor.

The centrifugal force sensing means (K2) formed on the driving frame 19, and the rotary winch ring 105 formed on the sensing device base cap 101 of the centrifugal force sensing means (K2) are integrated with the sensing device base cap 101. It is characterized in that it is configured as a separate type that can be disassembled and assembled so that the sensing direction of the stopper is changed depending on the assembly direction of the front and rear of the rotary winch ring 105.

An example of a braking method using a table lift's fall prevention safety device will be explained.

A rack gear 31 and a centrifugal force sensing device K2 are configured and coupled in the horizontal direction 94 of the scissor traveling axis 77 of the table lift;

During the operation of the table lift, high-speed running, suggesting a fall, occurs in the rack gear 31;

The pinion 34 of the rotation sensing shaft 35 rotating in engagement with the rack gear 31 rotates at high speed;

The rotation detection stopper 110 configured on the rotation plate 122 of the rotation detection shaft 35 rotating at high speed operates by centrifugal force to detect the groove 120 of the rotary winch ring 105 configured on the detection device base cap 101. ) is engaged;

The pinion 34 of the rotation sensing shaft 35 engages with the teeth of the rack gear 31 and stops;

The sensing means K2 on the rotation sensing axis 35 slides along the guide;

The operating members 20 and 21 and the braking means operate in conjunction with the rotation detection shaft 35 to bring about an emergency stop;

Reset the braked operation with reverse rotation.

In other words, in the braking method using the fall prevention safety device of the table lift,

1. Rotational motion conversion means (31, 34), centrifugal force sensing device (K2), operating members (20, 21), and braking means (33, 75) in the horizontal direction (94) of the scissor travel axis (77) of the table lift. ) is composed and combined

2. Step where the table lift moves up and down

3. A step in which high-speed movement, suggesting a fall, occurs in the rotational motion conversion means 31 and 34 while the table lift is running.

4. The rotation detection stopper 110 configured on the rotation plate 122 of the rotation detection shaft 35 rotating at high speed is operated by centrifugal force and stops by engaging the stopper groove 120 provided on the rotary winch ring 105. step

5. The axis of the sensing means (K2) slides along the guide.

6. A step of sudden stopping by operating the operating members (20, 21) and braking means (33, 75) in conjunction with the above 4.

7. Consisting of and applying the steps of initializing the operation of the braking means with reverse rotation.

A braking method using a fall prevention safety device for a table lift is presented.

Table lifts are equipment that vertically moves a table loaded with heavy objects up and down using direct or indirect thrust. They are fixed, mobile, and flange-type. They are classified according to use: industrial use, stage equipment, robot auxiliary equipment, production automation line use, etc. A variety of table lifts, including electric assembly tables, are being used, and various types of lifts are being commercialized, including various thrust methods such as hydraulic, electric cylinder, rigid chain thrust, and zipper chain thrust, as well as classification according to type and purpose. The present invention technology can be applied to a variety of lifts classified as is high.

A-3: Safety device (Ass'y), K2: Detection means,
17: second drive shaft attachment hole,
19: driving frame, 20: second driving shaft,
21: driving link, driving arm, 22: spring, position restoration elastic member,
23: driving link rotation axis, 24: guide slot,
31: rack gear, 32: pinion position restoration spring,
33: Claw-type driven stopper,
34: pinion, 35: rotation detection axis, 36: auxiliary rotation axis,
37: Auxiliary pinion, 38: Sensing body guide, 40: Scissor fixture,
41: Scissor driving unit, 45: Scissor hinge, 46: K2 axis (rotation detection axis),
69: table lift lower plate, 70: table lift upper plate,
71: Rigid chain, 72: Lower scissor roller guide,
73: upper scissor roller guide, 74: scissor rotation axis,
75: toothed stopper plate, 76: scissor fixing shaft,
77: Traveling axis, 78: Example of driving axis connection hole, 79: Guide roller,
80: power unit, 94: scissor horizontal movement, 96: scissor vertical movement,
99: Operating cylinder (hydraulic/pneumatic, electric), 100: Sensing device sub cap,
101: Sensing device base cap, 105: Rotating winch ring,
106: detection stopper rotation axis, 107: spring fixing pin, 108: spring fixing pin,
110: detection stopper, 110-1: detection stopper standby state,
110-3: Detection stopper driving state, 112: Position restoration spring,
120: sensing stopper groove, 121: bearing, 122: rotating plate,
222: guide member, 400: horizontal rail, 401: wheel rotation axis,
402: wheel, 500: rack gear, 501: pinion gear rotation axis,
502: pinion gear, 505: intermediate guide plate

Claims (8)

In the fall prevention safety device (A-3) of a table lift, a linear movement (91) composed horizontally with the floor (69) surface in the horizontal movement (94) area of the scissor (40) type structure is performed as a rotational movement (90). It is composed of rotational motion conversion means (31, 34) and a driving frame (19) that convert the The operating members (20, 21), which react to high-speed rotation with centrifugal force and operate in conjunction with the sensing means (K2) detected by the centrifugal force, are configured to operate in conjunction with the braking means (33, 75) to prevent the table lift from falling. A fall prevention safety device for a table lift, characterized by preventing According to clause 1,
The safety device is a drive frame (19) coupled to the traveling axis (77) that performs horizontal movement (94) of the scissor-type structure (40), and performs a linear movement (91) horizontal to the floor (69) surface and a rotational movement (90). ) is composed of at least one rack gear 31 that converts to ), and at least one pinion 34 corresponding face-to-face with the rack gear 31 is configured in a driving frame, and the pinion 34 is driven A detection stopper 110 and an elastic means 112 configured to rotate the rotation detection axis 35 of the frame 19 and monitor the speed of the rotation detection axis 35 are configured to rotate the rotation detection axis 35. It is configured on the plate 122, and when a vertical plunge suggesting a fall of the table lift occurs, the pinion 34, which rotates in response to the rack gear 31, rotates at high speed, and the pinion 34 connected to the rotation detection shaft 35 of the pinion The rotating plate 122 rotates at high speed, and the sensing stopper 110 formed on the rotating plate 122 rotates and protrudes with centrifugal force and inertial force exceeding the support limit of the elastic means 112, and the protruding sensing stopper 110 When the grooves of the rotary winch ring (105) corresponding to -3) engage with each other (120) and stop rotating, and the rotation sensing shaft (35) stops rotating, the pinion (34) that rotates the rack gear (31) A position change 98 in which a rotation sensing shaft 35 that is braked and operated in conjunction with this slides along the guide members 38 and 222 formed in the drive frame 19, and a drive link operated in conjunction with the position change 98 ( 21) and the second drive shaft 20 are configured to drive the braking means (33, 75). A fall prevention safety device for a table lift.
According to clause 1,
When a vertical drop that suggests a fall of the table lift occurs, a position detection sensor is configured on the rotation detection shaft 35 disposed on the travel axis 77, or an operating member that operates in conjunction with the position change, and the motor is left unloaded. A fall prevention safety device for a table lift, characterized in that it is configured with a control device that blocks the driving power in order to
According to clause 1,
An acceleration/deceleration gearbox is separately installed on the rotation detection shaft 35 of the driving frame 19, and an acceleration/deceleration gearbox is configured to input the accelerated/decelerated rotational force to the input terminal of the rotation plate 122 of the sensing means (K2) to amplify the centrifugal force. A fall prevention safety device for a table lift, characterized by improving detection ability by reducing or reducing
According to clause 1,
The centrifugal force sensing means (K2) formed on the driving frame 19, and the rotary winch ring 105 formed on the sensing device base cap 101 of the centrifugal force sensing means (K2) are integrated with the sensing device base cap 101. A fall prevention safety device for a table lift, characterized in that it is configured as a separate type that can be disassembled and assembled so that the sensing direction of the stopper is changed depending on the assembly direction of the front and rear of the rotary winch ring 105.
According to clause 5,
The table lift to which the fall prevention safety device (A-3) is applied is comprised of a mobile type with wheels or a fixed type that is fixed or placed on the floor.
In a table lift equipped with a fall prevention safety device (A-3), a scissor (40) type structure of at least one stage is formed between the upper plate (70) and the lower plate (69), and the scissor (40) type structure is provided. An operating cylinder (99) method that indirectly thrusts the upper plate by thrusting the structure, or a rigid chain (71) method of direct thrust that directly lifts the upper plate (70), is configured, and the traveling axis (77) of the scissor (40) type structure is configured. , rotational motion conversion means (31, 34) and driving for converting the linear motion (91), which is configured horizontally to the floor (69) surface, in the horizontal motion (94) area of the traveling axis (77) into rotary motion (90). A frame 19 is formed, and a centrifugal force detecting means (K2) configured in the driving frame 19, and a centrifugal force sensing means (K2) of the driving frame 19, detect centrifugal force at high speed rotation, which suggests a fall of the table lift. A fall prevention safety device (A-3) is applied including operating members (20, 21) and braking means (33, 75) that react by inertia and operate in conjunction with the sensing means (K2) detected by the centrifugal force. Table lift, characterized in that
In the braking method using the fall prevention safety device of the table lift
1. Step of forming and combining the rotational motion conversion means (31, 34) and the centrifugal force detection device (K2) in the horizontal direction (94) of the scissor travel axis (77) of the table lift.
2. Step where the table lift moves up and down
3. A stage in which high-speed movement, suggesting a fall, occurs in the rotational motion conversion means (31, 34) while the table lift is running.
4. The rotation detection stopper 110 configured on the rotation plate 122 of the rotation detection shaft 35 rotating at high speed is operated by centrifugal force and stops by engaging the stopper groove 120 provided on the rotary winch ring 105. step
5. The axis of the sensing means (K2) slides along the guide.
6. A step of sudden stopping by operating the operating members (20, 21) and the braking means (33, 75) in conjunction with the above 4.
7. Consisting of and applying the steps of initializing the operation of the braking means with reverse rotation.
Braking method using a fall prevention safety device for a table lift characterized by