KR101715808B1

KR101715808B1 - Lift assembly

Info

Publication number: KR101715808B1
Application number: KR1020150166985A
Authority: KR
Inventors: 김승호
Original assignee: 주식회사 에스엠티
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2017-03-15

Abstract

The present invention relates to a lift assembly and, more specifically, to a lift assembly capable of lifting a lightweight object using elasticity, adjusting the height of a lift, and fixating the lift. A lift assembly according to an embodiment of the present invention includes: an upper frame supporting a weighted object; an upper arm of which one end is hinge-joined to the upper frame; an upper assist arm positioned to be parallel to the upper arm; an upper elastic body generating an elastic force in the lift direction of the upper frames; a lower frame supporting a load; a lower arm of which one end is hinge-joined to the lower frame; a lower assist arm positioned to be parallel to the lower arm; and a lower elastic body generating an elastic force in a direction that the lower arm is spread from the lower frame. The lift assembly additionally includes an arm joint where the other ends of the upper arm, the upper assist arm, the lower arm, and the lower assist arm are hinge-joined and a locking device fixating an outer form when the upper arm is folded or spread by forming a locking structure. The lift assembly is capable of elastically lifting the weighted object at a predetermined height without a driving device.

Description

[0001] LIFT ASSEMBLY [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift assembly, and more particularly, to a lift assembly capable of lifting a light load using elasticity and adjusting a lift height to be fixed.

The lifting device is used for moving up and down a heavy object, and most of the lifting devices are equipped with a driving device. Although there are not as many as the number and types of industrial lifting devices, a few lifting devices are used for everyday life.

1A is a front view of a conventional scissor lift.

The scissor lift is a lifting device that is often used to lift heavy objects at industrial sites. The scissor lift comprises a drive arm 10, a hydraulic motor 20, a roller 30 provided at the upper and lower ends of the drive arm, and a rail 40 for guiding the movement of the roller. The scissor lift is an apparatus for lifting a heavy load by using hydraulic pressure or the like and is not suitable for use in everyday life including an additional driving device such as a hydraulic device 20 and a hydraulic pressure generating device. Further, due to the rollers 30 and the rails 40 installed on the upper and lower sides, the horizontal surface on which the scissor lift is installed is subject to spatial restrictions, resulting in a reduced space efficiency.

1B is a front view of a conventional lift-up table.

The lift-up table is a type of adjustable furniture that can adjust the height of the table top to increase the usability. Unlike the above-described scissor lift, the lift-up table does not include a driving device and is suitable for use in daily life. The lift-up table is constructed of a folding type, a type which changes the height by gravity, and a type which automatically raises the top plate by using elasticity. However, it is impossible to adjust the height of the top plate in both types. Further, when the upper plate is raised, the position is changed in the horizontal direction. However, there is no lift-up table in which the upper plate is raised only in the vertical direction.

One aspect of the invention is to provide a lift assembly that does not include additional drive devices.

Another aspect of the present invention is to provide a lift assembly which is lifted only in a vertical direction and is adjustable in lift height.

Yet another aspect of the present invention is to provide a lift assembly that is folded to a minimum volume.

A lift assembly according to an embodiment of the present invention includes a first horizontal surface in a horizontal plate shape supporting an upper load and a first vertical surface in a vertical plate shape for transmitting an elastic force to a first horizontal surface, Shaped upper arm which is hinged at one end to the other side of the first vertical surface and which is positioned in parallel with the upper arm, the upper arm being hinged at one end to one side of the first vertical plane; And an upper elastic body provided on the other side of the upper arm and the upper auxiliary arm to generate an elastic force in the upper arm and the upper auxiliary arm in a direction in which the upper frame is raised, A lower frame including a first horizontal surface on the first vertical surface and a second horizontal surface on the second vertical surface and a second vertical surface in a vertical plate shape for transmitting a load to the second horizontal surface; ; And a second vertical surface Shaped lower auxiliary arm hinged to one side of the lower arm and hinged to one side of the lower arm and positioned parallel to the lower arm and a rod-shaped lower auxiliary arm provided at one side of the lower arm and the lower auxiliary arm to deploy the lower arm and the lower auxiliary arm from the lower frame And a lower elastic body for generating an elastic force to the lower arm and the lower auxiliary arm in the direction of the lower arm and the lower elastic body, And the other end of the lower auxiliary arm is hinged to one side of the outer side of the two flat plates and the other end of the upper auxiliary arm is hinged to the other side of the outer side of the two flat plates And a locking device for locking the outer shape of the folding and unfolding by forming a locking structure at one end of the upper arm.

The upper auxiliary arm of the lift assembly according to an embodiment of the present invention includes a first upper elastic member protrusion formed on the other side of one end of the upper auxiliary arm and connected to one end of the upper elastic member, The upper arm of the lift assembly according to an embodiment of the present invention includes a second upper elastic protrusion protruding from the other side of the other end side of the upper arm and connected to the other end of the upper elastic body, The lower auxiliary arm of the lift assembly according to the present invention includes a first lower elastic protrusion formed on one side of one end of the lower auxiliary arm and connected to one end of the lower elastic body.

Further, the lower arm of the lift assembly according to the embodiment of the present invention includes a second lower elastic protrusion protruding from one side of the other end side of the lower arm and connected to the other end of the lower elastic body, And an elasticity adjusting lever which is hinged to one side of the outer side to change a position where the lower elastic body applies an elastic force to the lower arm when the elastic body is rotated at a predetermined angle.

Further, the upper arm of the lift assembly according to the embodiment of the present invention further includes a first lock gear in the form of a toothed wheel at one end hinged to the upper frame, The second lock gear is hinged to the upper frame so that the first lock gear and the second lock gear are engaged with each other, And a locking elastic member which applies an elastic force in a direction in which the first locking gear and the second locking gear are engaged with the locking latch, And a lock lever capable of manually exerting an external force on the other end portion of the lock driving arm when the first lock gear and the second lock gear are operated, .

Therefore, the lift assembly according to the embodiment of the present invention does not include an additional driving device.

Also, the lift assembly according to the embodiment of the present invention is lifted only in the vertical direction, and the lift height can be adjusted.

Further, the lift assembly according to the embodiment of the present invention is folded to a minimum volume.

The effects of the present invention are not limited to those mentioned above, and other solutions not mentioned may be clearly understood by those skilled in the art from the following description.

1A is a front view of a conventional scissor lift.
1B is a front view of a conventional lift-up table.
2A is a perspective view of the development of a lift assembly in accordance with an embodiment of the present invention.
2B is a perspective view of another direction of deployment of the lift assembly in accordance with an embodiment of the present invention.
2C is a perspective view of the folding assembly of a lift assembly according to an embodiment of the present invention.
Figure 2d is a cross-sectional view of a fold assembly of a lift assembly in accordance with an embodiment of the present invention.
FIG. 3A is a side view of the upper arm and the upper auxiliary arm of the lift assembly according to an embodiment of the present invention when folded. FIG.
3B is a side view of the upper arm and the upper auxiliary arm of the lift assembly according to another embodiment of the present invention.
4A is a side view of a lower arm and a lower auxiliary arm of a lift assembly according to an embodiment of the present invention when folded.
4B is a side view of the lower arm and the lower auxiliary arm of the lift assembly according to the embodiment of the present invention.
4C is a side view of the elasticity adjusting lever of the lift assembly according to the embodiment of the present invention.
5A is a detailed view of locking of a locking device of a lift assembly according to an embodiment of the present invention.
5B is a detailed view of unlocking the lock assembly of the lift assembly according to the embodiment of the present invention.
6A is a perspective view of a folding table of a lift table for a computer using a lift assembly according to an embodiment of the present invention.
6B is a perspective view of the development of a lift table for a computer to which a lift assembly according to an embodiment of the present invention is applied.

Further objects, features and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Before describing the present invention in detail, it is to be understood that the present invention is capable of various modifications and various embodiments, and the examples described below and illustrated in the drawings are intended to limit the invention to specific embodiments It is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", and the like, specify that the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof is contemplated by one or more of the others But do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

Also, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation, Software. &Lt; / RTI >

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2A is a perspective view of the lift assembly according to the embodiment of the present invention, FIG. 2B is a perspective view of another direction of the lift assembly according to the embodiment of the present invention, FIG. FIG. 2d is a perspective view of a folding assembly of a lift assembly cut along a AA 'cut plane in FIG. 2c, when the lift assembly is folded in accordance with an embodiment of the present invention.

2A to 2D, a lift assembly 1 according to an embodiment of the present invention includes a first horizontal surface 1110 in a horizontal plate shape supporting an upper load, a second horizontal surface 1110 in a first horizontal plane 1110 Shaped top arm 1120 which is hinged at one end to one side of the first vertical surface 1120, and a second vertical surface 1120 perpendicular to the first vertical surface 1120, Shaped top auxiliary arm 1300 hinged at one end to the other side of the first vertical surface 1120 and positioned in parallel with the upper arm 1200; And an upper elastic body 1400 provided on the other side of the upper auxiliary arm 1300 and generating an elastic force to the upper arm 1200 and the upper auxiliary arm 1300 in a direction in which the upper frame 1100 is raised A second horizontal surface 1510 in the form of a horizontal plate that supports the load, and a second vertical surface 1510 in the form of a vertical plate that transmits a load to the second horizontal surface 1510. [ Shaped bottom arm 1600 hinged at one end to the other side of the second vertical surface 1520 and a second vertical surface 1520 of the second vertical surface 1520, Shaped lower auxiliary arm 1700 which is hinged at one end on one side and is positioned in parallel with the lower arm 1600 and a lower auxiliary arm 1700 installed on one side of the lower arm 1600 and the lower auxiliary arm 1700 A lower elastic body 1800 for generating an elastic force to the lower arm 1600 and the lower auxiliary arm 1700 in a direction to deploy the lower arm 1600 and the lower auxiliary arm 1700 from the lower frame 1500 Two plates are formed in parallel and fixed, and the other end of the upper arm 1200 and the other end of the lower arm 1600 are received between the two plates and hinged to the two plates, The other end of the lower auxiliary arm 1700 is hinged to one side of the outer side of the flat plate, And a locking device 2000 for locking the outer shape of the folding and unfolding by forming a locking structure at one end of the upper arm 1200, .

In the lift assembly 1 according to the embodiment of the present invention, an upper arm 1200 and an upper auxiliary arm 1300 are installed on both sides of the upper frame 1100. [ Further, a lower arm 1600 and a lower auxiliary arm 1700 are provided on both sides of the lower frame 1500. The upper arm 1200 and the lower arm 1600 are located on the same plane, which is an optimal position for each member to be folded to the minimum without interfering with each other when folded. 2D, the upper frame 1100, the upper arm 1200, the upper auxiliary arm 1300, the lower frame 1500, the lower arm 1600, and the lower auxiliary arm 1700, Densely clustered, but in development each member does not interfere or cross each other. This is to allow each member to occupy the minimum space at the time of folding and to further improve the space efficiency and usability and aesthetics of the lift assembly 1 according to the embodiment of the present invention. It will also be desirable for the locking device 2000 to be disposed and installed in an optimal position. According to an embodiment of the present invention, the lock driving arm 2030 of the locking device 2000 is positioned on the upper side of the upper auxiliary arm 1300.

The upper auxiliary arm 1300 of the lift assembly 1 according to the embodiment of the present invention is protrudingly formed on the other side of one end side of the upper auxiliary arm 1300, And the upper arm 1200 of the lift assembly 1 according to the embodiment of the present invention is formed to protrude from the other side of the upper arm 1200 at the other end side And a second upper elastic protrusion 1210 to which the other end of the upper elastic body 1400 is connected and the lower auxiliary arm 1700 of the lift assembly 1 according to the embodiment of the present invention includes a lower auxiliary arm And a first lower elastic protrusion 1710 protruding from one side of one end of the lower elastic member 1800 and connected to one end of the lower elastic member 1800.

The lift assembly 1 according to the embodiment of the present invention is characterized in that the upper and lower elastic members 1400 and 1800 are tightly clustered in addition to tightly crowding the members of the rod- One on each side. The upper and lower elastic bodies 1400 and 1800 are also arranged and arranged so that they are not coplanar with the members of the bar and the different elastic bodies, such that the members of the bar are arranged and installed such that they are not located on the same plane. Is installed. Again, this is so that all members occupy the minimum space when folded. The first upper elastic member protrusion 1310 and the second upper elastic member protrusion 1210 connected to the upper elastic member 1400 protrude from the other side of the upper auxiliary arm 1300 and the upper arm 1200, The first lower elastic protrusion 1710 connected to the elastic body 1800 protrudes from one side of the lower auxiliary arm 1700.

The lift assembly 1 according to the embodiment of the present invention is configured to be movable between a state in which the lift assembly 1 is folded and a state in which the lift assembly 1 is deployed and any state in the middle thereof, As shown in Fig. The locking device 2000 is a device for fixing the lift height after adjusting the lift height of the lift assembly 1. The details of the construction and operation of the locking device 2000 are described with reference to Figures 5A and 5B Will be described in detail.

Further, the upper arm 1200 of the lift assembly 1 according to the embodiment of the present invention further includes a gear-shaped upper joint gear 1230 at the other end side. The lower arm 1600 further includes a lower joint gear 1620 in the form of a gear corresponding to the upper joint gear 1230 on the other end side.

The upper frame 1100 and the upper arm 1200 and the upper and lower auxiliary arms 1300 and 1900 are connected to each other in a state in which the upper arm 1200 and the upper auxiliary arm 1300 are parallel to each other, And the female joint 1900 are parallel to each other, the joint shape is deformed. The lower frame 1500 and the lower arm 1600 as well as the lower auxiliary arm 1700 and the female joint 1900 are arranged in a state in which the lower arm 1600 and the lower auxiliary arm 1700 are parallel to each other, And the female joint 1900 are parallel to each other. This deformation is caused by an elastic force of the upper elastic body 1400 and the lower elastic body 1800 or an external force applied to the lift assembly 1. The upper elastic body 1400 and the lower elastic body 1800 and the external force exerted on the lift assembly 1 are relatively small. When the upper arm 1200 and the lower arm 1600 do not form the same angle around the arm joint 1900, the parallelism of the position between the members is reduced. As a result, the upper frame 1100 and the lower frame 1500 from being parallel to each other, resulting in reduced usability of the lift assembly 1.

The lift assembly 1 according to the embodiment of the present invention is configured such that the upper arm 1200 and the lower arm 1600 are fixed to the arm joints And an upper joint gear 1230 and a lower joint gear 1620 for restricting the upper and lower frames 1100 and 1100 to expand and collapse at the same angle with respect to the center of the upper frame 1100 and the lower frame 1500, .

FIG. 3B is a side view of the upper arm and the upper auxiliary arm of the lift assembly according to another embodiment of the present invention when the upper arm and the upper auxiliary arm of the lift assembly are folded. FIG. to be.

3A and 3B, a lift assembly 1 according to an embodiment of the present invention includes an upper frame 1100, an upper arm 1200, an upper auxiliary arm 1300, a upper elastic body 1400, And includes a female joint 1900.

One end of the upper arm 1200 and the upper auxiliary arm 1300 are hinged to the upper frame 1100 and the other end of the upper arm 1200 and the upper auxiliary arm 1300 are hinged to the arm joint 1900 . The upper arm 1200 and the upper auxiliary arm 1300 are arranged in parallel with each other so that the upper arm 1200 and the upper auxiliary arm 1300 are parallel to each other and the upper frame 1100 and the arm joint 1900 are parallel to each other. The upper elastic body 1400 and the female joint 1900 can deform the engagement shape.

The upper elastic body 1400 generates an elastic force in the upper arm 1200 and the upper auxiliary arm 1300 in the direction in which the upper frame 1100 is lifted. Is automatically raised.

FIG. 4A is a side view of the lower arm and the lower auxiliary arm of the lift assembly according to the embodiment of the present invention when folded, FIG. 4B is a side view of the lower arm and the lower auxiliary arm of the lift assembly, 4C is a side view of the elasticity adjusting lever of the lift assembly according to the embodiment of the present invention.

4A and 4C, the lower arm 1600 of the lift assembly 1 according to the embodiment of the present invention is formed to protrude from one side of the other end side of the lower arm 1600, The lower elastic member 1800 is hinged to one side of the outer side of the arm joint 1900 and rotated at a predetermined angle, And an elasticity adjusting lever 1610 capable of changing a position for applying an elastic force to the elastic member 1600.

The lift assembly 1 according to the embodiment of the present invention includes a lower arm 1600, a lower auxiliary arm 1700, a lower elastic body 1800, and a female joint 1900. The lower arm 1600 of the lift table according to the embodiment of the present invention includes an elastic force adjusting lever 1610 including a lower elastic body projection 1611 to which the lower elastic body 1800 is connected to the lower arm 1600 .

One end of the lower arm 1600 and the lower auxiliary arm 1700 are hinged to the lower frame 1500 and the other ends of the lower arm 1600 and the lower auxiliary arm 1700 are hinged to the arm joint 1900 . The lower arm 1600 and the lower auxiliary arm 1700 are arranged in parallel with each other so that the lower arm 1600 and the lower auxiliary arm 1700 are parallel to each other and the lower frame 1500 and the arm joint 1900 are parallel to each other, The lower elastic body 1800 and the arm joint 1900 can deform the joint shape.

The elastic force adjusting lever 1610 is provided with a second lower elastic protrusion 1611 to which the other end of the lower elastic body 1800 is connected and one end of the lower elastic body 1800 is provided at one end of the lower auxiliary arm 1700 A first lower elastic protrusion 1710 is provided. The lower elastic body 1800 generates an elastic force in the lower arm 1600 and the lower auxiliary arm 1700 in the direction in which the lower arm 1600 and the lower auxiliary arm 1700 are deployed from the lower frame 1500, The lower arm 1600 and the lower auxiliary arm 1700 are automatically deployed from the lower frame 1500 when the reaction force or the frictional force is released.

In addition, the lift assembly 1 according to the embodiment of the present invention can adjust the strength of the elastic force applied to the lower arm 1600 and the lower auxiliary arm 1700 through the elastic force adjusting lever 1610. [ The elasticity adjusting lever 1610 causes the lower elastic body 1800 to change the position where the lower elastic body 1800 is connected to the lower arm 1600. The elastic force of the lower elastic member 1800 does not change but the elastic force of the elastic force applied to the lower arm 1600 and the lower auxiliary arm 1700 is changed as the angle of the elastic force applied to the lower arm 1600 and the lower auxiliary arm 1700 is changed. The intensity of the applied elastic force is changed.

Therefore, it becomes possible to adjust the strength of the elastic force applied to the lift assembly 1, and it becomes possible to control the strength of the elastic force for deploying the lift assembly 1. [ This is to adjust the elastic force required for the deployment of the lift assembly 1, depending on the weight of the loaded load. The elastic force adjusting lever 1610 can be positioned as shown in FIG. 5B, and if the load to be mounted is relatively light, the elastic force adjusting lever 1610, as shown in FIG. 5C, .

FIG. 5A is a detailed view of locking the locking device of the lift assembly according to the embodiment of the present invention, and FIG. 5B is a detailed view of unlocking the locking device of the lift assembly according to the embodiment of the present invention.

5A and 5B, the upper arm 1200 of the lift assembly 1 according to the embodiment of the present invention includes an upper frame 1100 and an upper frame 1100. The upper frame 1200 is hinged to the upper frame 1100, The lock device 2000 of the lift assembly 1 according to the embodiment of the present invention further includes a second lock gear 1220 in the form of a gear corresponding to the first lock gear 1220, And a lock hinge 2012 hinged to one side of the upper frame 1100 to allow rotation of the first lock gear 1220 and the second lock gear 2011 to be engaged and spaced apart, A lock elastomer 2020 which applies an elastic force in a direction in which the first lock gear 1220 and the second lock gear 2011 are engaged with the lock catch 2010; And one end of which is hinged to one side of the lock catch 2010 to cause the first lock gear 1220 and the second lock gear 2011 to be spaced apart when an external force is applied, Characterized in that it comprises a,; on the locking the driving arm (2030); and, locking the drive arm 2030 can be manually action of an external force to the other end of the lock lever 2040 in the.

The locking device 2000 allows the lock lever 2040 to be operated to lock or unlock the contour of the lift assembly 1. [ Therefore, when the lock lever 2040 is operated in a state where the lift assembly 1 is folded, the lift assembly 1 is automatically opened, and the lock lever 2040 is operated, When an external force is applied to the lower side, the lift assembly 1 is folded. In addition, when the lock lever 2040 is operated, the lift assembly 1 is adjusted to have an arbitrary lift height, and then, when the lock lever 2040 is released, the arbitrary lift height is fixed.

This action is achieved by the fact that the second lock gear 2011 of the lock catch 2010 is engaged with the first lock gear 1220 by the lock elastic body 2020 so that the position of the upper arm 1200 is fixed, When the external force is applied to the first lock gear 2040, the lock driving arm 2030 linearly moves to rotate the lock catch 2010 to separate the second lock gear 2011 from the first lock gear 1220.

When the position of the upper arm 1200 is fixed by the engagement of the second lock gear 2011 of the lock catch 2010 and the first lock gear 1220, the upper arm 1200, the upper auxiliary arm 1300, The structure constituted by the arm joint 1900 and the upper frame 2100 is fixed and the structure composed of the lower arm 1600 and the lower auxiliary arm 1700 and the arm joint 1900 and the lower frame 1500 is fixed . The lift assembly 1 according to the embodiment of the present invention has a structure in which the entire structure and the hinges of the respective portions are fixed when one of the hinge connection portions of the structure is fixed.

The first lock gear 1220 and the second lock gear 2011 are formed in the form of a toothed wheel so that not only the state in which the lift assembly 1 is folded and the state in which the lift assembly 1 is deployed, Is located at an arbitrary height in the middle of the two states.

Accordingly, the lift assembly 1 according to the embodiment of the present invention can be operated in the state where the lift assembly 1 is folded and the state in which the lift assembly 1 is deployed and any state in the middle thereof Can be easily fixed.

FIG. 6A is a perspective view of a lift table for computing using a lift assembly according to an embodiment of the present invention, and FIG. 6B is a perspective view of the development of a lift table for computing using a lift assembly according to an embodiment of the present invention.

6A and 6B are lifting devices that allow a top plate table 3000 to be installed on the upper part of the lift assembly 1 to allow for computing in a left-hand and right-handed manner. Using a computer for long periods of time is detrimental to the body in many ways, and the best way to resolve it is to stand in the middle of the work, walk, and so on. The lift table for computing is a lift device that enables easy computing posture conversion from stand-up to sitting.

As described above, the lift assembly 1 according to the embodiment of the present invention can be applied to a device used in daily life.

It is a matter of course that the utilization of the lift assembly 1 is not limited to the lift table for computing, although the lift table for computing shown in Figs. 6A and 6B is merely an example of utilization of the lift assembly 1. Fig.

As described above, the lift assembly according to an embodiment of the present invention includes an upper frame for supporting loads, an upper arm hinged to one end of the upper frame, and an upper auxiliary arm disposed parallel to the upper arm; A lower frame supporting the load, a lower arm hinged to the lower frame at one end thereof, and a lower auxiliary arm disposed parallel to the lower arm; And a lower elastic body for generating an elastic force in a direction for expanding the lower arm from the lower frame, wherein the upper arm, the upper auxiliary arm, the lower arm, and the other arm of the lower auxiliary arm are hinge- And a locking device for fixing the outer shape of the folding and unfolding device, so that the load can be lifted by a predetermined height by the elastic force without the driving device That it can be seen that the basic technical idea.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but rather are not intended to limit the scope of the technical idea of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10 ... drive arm
20 ... hydraulic machine
30 ... roller
40 ... rail
1 ... lift assembly
1100 ... upper frame
1110 ... first horizontal plane
1120 ... first vertical surface
1200 ... upper arm
1210 ... second upper elastic body projection
1220 ... first lock gear
1230 ... upper joint gear
1300 ... upper auxiliary arm
1310 ... first upper elastic body projection
1400 ... upper elastic body
1500 ... lower frame
1510 ... second horizontal plane
1520 ... second vertical plane
1600 ... lower arm
1610 ... elasticity adjusting lever
1611 ... second lower elastic member projection
1620 ... Lower joint gear
1700 ... lower auxiliary arm
1710 ... first lower elastic member projection
1800 ... lower elastic body
1900 ... arm joints
2000 ... locks
2010 ... Lock Clasp
2011 ... 2nd lock gear
2012 ... lock hinge
2020 ... lock elastomer
2030 ... lock drive arm
2040 ... lock lever
3000 ... top plate table

Claims

An upper frame including a first horizontal surface in a horizontal plate shape supporting an upper load and a first vertical surface in a vertical plate shape for transmitting an elastic force to the first horizontal surface,
A rod-shaped upper arm having one end hinged to one side of the first vertical surface;
A rod-shaped upper auxiliary arm hinged at one end to the other side of the first vertical surface and positioned in parallel with the upper arm;
And an upper elastic body installed on the other side of the upper arm and the upper auxiliary arm to generate an elastic force to the upper arm and the upper auxiliary arm in a direction in which the upper frame ascends,
Including,
A lower frame including a horizontal plate-shaped second horizontal surface for supporting a load, and a vertical plate-shaped second vertical surface for transmitting a load to the second horizontal surface;
A rod-shaped lower arm having one end hinged to the other side of the second vertical surface;
A rod-shaped lower auxiliary arm hinged at one end to one side of the second vertical surface and positioned in parallel with the lower arm;
A lower elastic body provided at one side of the lower arm and the lower auxiliary arm to generate an elastic force to the lower arm and the lower auxiliary arm in a direction to deploy the lower arm and the lower auxiliary arm from the lower frame,
&Lt; / RTI &
Wherein two flat plates are formed in a shape fixed in parallel to each other, and the other end of the upper arm and the other end of the lower arm are received and hinged to the two flat plates between the two flat plates, And the other end of the upper auxiliary arm is hinged to the other of the outer sides of the two flat plates,
A locking device for forming an engagement structure at one end of the upper arm to fix the outer shape at the time of folding and unfolding,
&Lt; / RTI >

The method according to claim 1,
The upper auxiliary arm includes:
A first upper elastic member protrusion formed on the other side of one end of the upper auxiliary arm and connected to one end of the upper elastic member,
Including,
Wherein the upper arm comprises:
A second upper elastic member protrusion formed on the other side of the other end of the upper arm and connected to the other end of the upper elastic member,
Including,
Wherein the lower auxiliary arm comprises:
A first lower elastic protrusion formed on one side of one end of the lower auxiliary arm and connected to one end of the lower elastic body,
Wherein the lift assembly comprises:

The method according to claim 1,
Wherein the lower arm comprises:
And a second lower elastic protrusion protruding from one side of the other end of the lower arm and connected to the other end of the lower elastic body, wherein the second lower elastic protrusion is hinged to one side of the outer side of the arm joint, An elastic force adjusting lever capable of changing a position at which the lower elastic body applies an elastic force to the lower arm,
Wherein the lift assembly comprises:

The method according to claim 1,
Wherein the upper arm comprises:
And a first lock gear having a tooth-like shape on one end portion thereof hinged to the upper frame,
Further included,
The locking device comprises:
A second lock gear having a gear shape corresponding to the first lock gear and a second lock gear hinged to the upper frame so as to allow rotation of the first lock gear and the second lock gear, A locking latch including a locking hinge;
A locking elastic body for applying an elastic force to the lock latch in a direction in which the first lock gear and the second lock gear are engaged with each other,
A rod-shaped lock driving arm hinged to the lock latch at one end thereof to cause the first lock gear and the second lock gear to be spaced apart from each other when an external force is applied;
And a lock lever capable of manually applying an external force to the other end of the lock driving arm,
Wherein the lift assembly comprises: