A load-adjustable vertically moving scaffold comprises a base unit, a work support provided on an upper part of the base unit and a lift supporting unit supporting the work support to vertically move with respect to the base unit, and the lift supporting unit comprises fixed guide members extended upward from both sides of the base unit, slope guide members installed at front sides of the fixed guide members and configured to be tilted with respect to the fixed guide members, a lift supporting shaft configured to vertically move along the slope guide members, and an elastic member having one end fixed to one side of the work support adjacent to the fixed guide members and other end connected with the lift supporting shaft to apply an elastic bias to the lift supporting shaft toward the fixed guide members.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 10-2015-0106323, filed on Jul. 28, 2015 and Korean Patent Application No. 10-2015-0133930, filed on Sep. 22, 2015, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

1. Field of the Invention

The present invention relates to a load-adjustable vertically moving scaffold, and more specifically, to a load-adjustable vertically moving scaffold capable of allowing a worker to continue a work at a predetermined height by automatically lowering or lifting a work support when an object to be processed is loaded or unloaded, and adjusting a lowering distance per unit weight depending on kinds of objects to be loaded.

2. Discussion of Related Art

Generally, scaffolds allow various tools or materials required according to a work process to be placed thereon, and are classified into a fixed type in which a plate on which the tools or materials are placed is fixed and a lifting type in which the plate is vertically moved by a separate lifting means.

Of those, a vertically moving scaffold is capable of adjusting its height by lifting and lowering a plate as necessary, and has a link structure in which a plurality of horizontal link bars and vertical link bars are connected by various joints.

More specifically, a conventional vertically moving scaffold, as shown inFIG. 1, includes a base frame11, a mount frame13including a plate on which tools, materials, etc. are placed, and a lifting link structure15for lifting the mount frame13, and adjusts its height by vertically moving the mount frame13by vertical extension of the link structure15.

Since the conventional vertically moving scaffold generally has a complicated structure due to the link structure15for lifting the mount frame14, there have been problems of causes of malfunction and failure being provided and supporting a load and also precisely adjusting the height when a weight of the placed material is relatively great being difficult.

To solve these problems, various vertically moving scaffolds have been developed, however, the conventional vertically moving scaffold is capable of adjusting a lift height through a pump, an electric motor, or other actuators, and has a problem of work efficiency being degraded due to long time required to control a height of a scaffold when it is necessary to frequently change the height of the scaffold.

SUMMARY OF THE INVENTION

The present invention is directed to provide a load-adjustable vertically moving scaffold to solve the problems. The load-adjustable vertically moving scaffold has high work efficiency and is able to adjust a lowering distance per unit weight of objects to be processed by automatically lowering according to a load of the objects to be processed.

The load-adjustable vertically moving scaffold according to present invention may include a base unit, a work support provided on an upper part of the base unit and configured to support objects to be processed, and a lift supporting unit supporting the work support to vertically move with respect to the base unit, wherein the lift supporting unit may include fixed guide members extended upward from both sides of the base unit, slope guide members installed at front sides of the fixed guide members and formed to be tilted with respect to the fixed guide members in a direction away from the fixed guide members while being extended downward from an upper end thereof, a lift supporting shaft configured to vertically move along the slope guide members, and an elastic member having one end fixed to one side of the work support adjacent to the fixed guide members and the other end connected with the lift supporting shaft to apply an elastic bias to the lift supporting shaft toward the fixed guide members, wherein the work support is coupled so that the one side to which the elastic member is fixed is vertically moved along the fixed guide members and has a lower end of the other side formed to be supported on the lift supporting shaft.

The slope guide members may each be coupled to one side of each of the fixed guide members to be rotatable in forward and rearward directions of the base unit so that tilt angles are adjustable with respect to the fixed guide members, and may further include a tilt angle adjusting unit to control the tilt angles of the slope guide members.

The slope guide members may be extended in parallel to the fixed guide members to be lowered down to a lowermost position even if the objects to be processed are not loaded on the work support.

The tilt angle adjusting unit may preferably include a rotating shaft extended in a direction in which both slope guide members are connected to the base unit and rotatably installed thereto; pinions coupled to both ends of the rotating shaft and integrally rotating with the rotating shaft; racks formed on lower ends of the slope guide members, extended in a circular arc direction with respect to rotation centers of the slope guide members, and engaged with the pinions; and a control lever controlling the tilt angles of the slope guide members by rotating the slope guide members, which are connected through the racks, by rotating the pinions.

The load-adjustable vertically moving scaffold may further include a latching unit connecting the rotating shaft and the control lever so that the pinions are rotated in one direction by the rotation of the control lever in a process in which the tilt angles of the slope guide members are controlled by the control lever.

The tilt angle adjusting unit may include an actuator including a main body installed at the base unit and withdrawing rods connected with the slope guide members, and is configured to control the tilt angles of the slope guide members by forward and backward movement of the withdrawing rods.

The base unit may further include a transfer caster formed on a lower part thereof to be movable.

The work support may further include a lifting unit supported to be lifted with respect to the base unit by the lift supporting unit; and a loading unit support which protrudes forward from the lifting unit to be lifted along with the lifting unit and is coupled to the loading unit, and may further include a cover unit configured to surround the base unit, the lift supporting unit, and the lifting unit and having a long hole vertically extended on one side thereof so that the loading unit support passes therethrough.

The loading unit may be configured to correspond to shapes or sizes of objects to be processed and configured to be coupled to and separated from the loading unit support.

The load-adjustable vertically moving scaffold according to the present invention can constantly maintain a work height of a worker by lowering and lifting a work support in a process in which the objects to be processed are loaded or unloaded, thereby preventing a waist or knee of the worker from being injured.

Further, the load-adjustable vertically moving scaffold can be applied to various products by controlling a lowering distance per unit weight according to kinds of the objects to be processed.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, a load-adjustable vertically moving scaffold according to the embodiment of the present invention will be described in detail with reference to the attached drawings. While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit the invention to the particular forms disclosed, on the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. In the attached drawings, the dimensions of components are shown in an enlarged scale for clarity of the present invention.

InFIGS. 2 to 6, an embodiment of a load-adjustable vertically moving scaffold10according to present invention is illustrated.

Referring to the figures, the load-adjustable vertically moving scaffold10includes a base unit100, a work support200installed on an upper part of the base unit100to support objects to be processed, and a lift supporting unit300supporting the work support200to vertically move with respect to the base unit100.

The base unit100is installed on a floor of a work place to support the lift supporting unit300and the work support200. As shown in the embodiment of the present invention, the base unit100may include a support member110to be simply supported on the floor of the workplace and to be fixed and installed to the floor of the work place through an anchor, a fixing bolt, or the like.

The work support200is installed on an upper part of the base unit100to be vertically moved by the lift supporting unit300. The objects to be processed may be loaded or placed on the work support200for a work.

The work support200has a planar shape in the embodiment of the present invention, however, the work support200may be formed in various shapes according to the kinds or shapes of the objects to be processed, and may include escaping prevention members formed at an edge of the work support200to prevent the objects to be processed from escaping as necessary.

A rod cell is attached to the work support200to measure weights of the objects to be processed mounted on the work support200or prevent the objects to be processed, having weights greater than a set weight, from being loaded.

The lift supporting unit300supports the work support200to vertically move with respect to the base unit100.

The lift supporting unit300includes fixed guide members310extended upward from both sides of the base unit100, slope guide members320installed to be spaced apart from the fixed guide members310at a predetermined distance, a lift supporting shaft330vertically moving along with the slope guide members320, and an elastic member340installed between the lift supporting shaft330and the work support200.

Hereafter, for convenience, a portion to which the fixed guide members310are installed is referred to as a rear side of the base unit100, and a direction in which the slope guide members320are installed with respect to the fixed guide members310is referred to as a front side.

The fixed guide members310are provided on both sides of a rear end of the base unit100, respectively. The two fixed guide members310are extended upward from the base unit100in a vertical direction. First guide grooves311extended in a vertical longitudinal direction are formed on two opposite surfaces of the fixed guide members310, respectively, and first guide rollers210installed on both sides of the rear side of the work support200are formed to move along the first guide grooves311.

The two fixed guide members310are connected with each other by a connecting bar350, wherein the connecting bar350prevents the fixed guide members310from moving away from each other in a process in which the work support200is lifted or lowered.

The slope guide members320are extended from front sides of the fixed guide members310to be tilt at a predetermined angle with respect to the fixed guide members310. That is, the slope guide members320are formed to be tilted in a direction away from the fixed guide members310while extending downward from upper ends. One upper side of each of the slope guide members320is rotatably coupled to a connecting member formed in each of the fixed guide members310, such that the slope guide members320may entirely be rotated at a predetermined angle with respect to coupling points P.

Second guide grooves321are also formed at opposite surfaces of the slope guide members320in a longitudinal direction, and the lift supporting shaft330is connected with the second guide grooves321to be lifted.

The lift supporting shaft330includes second guide rollers331formed on both sides thereof to move along the second guide grooves321, so the lift supporting shaft330may vertically move along the slope guide members320. The lift supporting shaft330supports a lower end of the work support200.

The elastic member340, which is an extension spring, has one end connected to a rear end of the work support200and the other end connected to the lift supporting shaft330.

Further, a gas cylinder may be further provided at a lower part of the work support200to absorb shock. One side and the other side of the gas cylinder are each installed at the lift supporting shaft330and the front end of the work support200to prevent the work support200from being suddenly lowered or lifted due to sudden change in a load generated when the objects to be processed are suddenly loaded on or unloaded from the work support200.

In the lift supporting unit300, the slope guide members320are formed to be tilted in a direction away from the fixed guide members310while extending downward from the fixed guide members310. Thus, when the objects to be processed are loaded on the work support200, the work support200is lowered while the elastic member340is elongated by the load of the objects to be processed. The work support200is stopped at a point that the load of the objects to be processed on the work support200and an elastic force of the elastic member340are in equilibrium. When the objects to be processed are additionally loaded, the work support200is further lowered to correspond to an increased load. Conversely, when the objects to be processed loaded on the work support200are unloaded, the work support200is lifted by the elastic force of the elastic member340while the load is reduced.

Since the work support200is automatically lowered or lifted depending on whether the load, applied to the work support200while the objects to be processed are loaded on or unloaded from the work support200, is changed, a worker continues to work at a predetermined height, thereby increasing work efficiency.

Also, the lift supporting unit300may further include a tilt angle adjusting unit360to control tilt angles of the slope guide members320.

As the tilt angles of the slope guide members320are adjusted by the tilt angle adjusting unit360, when the objects to be processed are loaded or unloaded, a lift distance per unit weight of the work support200may be adjusted. That is, when the slope guide members320have larger tilt angles than the fixed guide members310, a lowering distance per unit weight of the work support200is reduced. Conversely, when the slope guide members320are moved in a direction approaching the fixed guide members310, such that the tilt angles are reduced, the lowering distance per unit weight of the work support200is increased.

Therefore, when the objects to be processed are made of a material having a high specific gravity such as metal or stone, tilt angles of the slope guide members320are increased. When the objects to be processed are made of a material having a low specific gravity such as a synthetic resin, a fiber, or a paper box, the tilt angles of the slope guide members320are reduced. Thus, a lowering distance is controlled according to kinds of the objects to be processed.

The tilt angle adjusting unit360includes a rotating shaft installed at the base unit100, pinions362installed at the rotating shaft, racks363coupled to lower ends of the slope guide members320; a control lever364for rotating the rotating shaft; and a latch unit365connecting the control lever364with the rotating shaft.

The rotating shaft is installed at the base unit100to be extended in a direction of connecting the slope guide members320, and is rotatable. The pinions362are installed on both ends of the rotating shaft to be integrally rotated along with the rotating shaft.

The racks363, as described above, are formed at lower ends of the slope guide members320, and are extended in a circular arc direction with respect to the coupling points P as rotation centers of the slope guide members320. The racks363are engaged with the pinions362, such that rotation force is transmitted by the pinions362and the racks363. And thus, the slope guide members320may be rotated forward or backward with respect to the coupling points P.

The control lever364is to control tilt angles of the slope guide members320by rotating the rotating shaft, and is connected with the rotating shaft by the latch unit365.

The latch unit365includes two latch wheels366installed on the rotating shaft, and a first latch367and a second latch368mounted to the latch wheels366, respectively. The first latch367transmits the rotational force to the rotating shaft only when the control lever364is rotated on one side, and the second latch368is configured to limit rotation of the slope guide members320.

When the slope guide members320are rotated in a direction in which the tilt angles are increased, fixing positions of the first latch367and the second latch368are set to rotate the first latch367and the second latch368in one direction of the rotating shaft, and the rotational force is transmitted so that the pinions362are rotated in a direction in which the slope guide members320are moved away from each other. Conversely, when the slope guide members320are rotated in a direction in which the tilt angles are decreased, the fixing positions of the first latch367and the second latch368are set to have the opposite effect to when the tilt angles are increased.

When the control of the slope guide members320is completed, the second latch368is fixed in the opposite direction to the first latch367, such that the slope guide members320keep the tilt angles fixed regardless of external factors such as a load change of the objects to be processed.

The first latch367and the second latch368control a setting direction by first and second latch operating units369and370shown inFIG. 2, respectively.

The tilt angle adjusting unit360of the embodiment of the present invention may allow a worker to arbitrarily select control of a lowering distance per unit weight according to the kinds or shapes of the objects to be processed to control the tilt angles of the slope guide members320.

Further, the slope guide members320may be extended in parallel to the fixed guide members310. In this case, when the slope guide members320are extended in parallel to the fixed guide members310, the elastic member340is not elongated as the work support200is not lowered, and thus the work support200is lowered down to a lowermost position by a self-load of the work support200without external force.

When the objects to be processed should be loaded on the work support200while the objects to be processed are placed on a floor of the work place, the objects to be processed may be easily loaded on the work support200after the work support200is lowered by controlling the slope guide members to be extended in parallel to the fixed guide members310. After the loading is completed, by controlling the slope guide members320to have desired tilt angles, the work support200is lifted by elastic force of the elastic member340, and thus the worker may comfortably work while stretching his/her back.

Further, a sensor is attached to one side of the base unit100or the lift supporting unit300to sense the lowering of the work support200, and the sensor may automatically check a daily workload by automatically monitoring the number of descents of the work support200.

Another embodiment of the tilt angle adjusting unit360is illustrated inFIG. 6.

The tilt angle adjusting unit360of the embodiment of the present invention includes an actuator installed in the base unit100, wherein the actuator may be applied with a pneumatic or hydraulic cylinder.

When a hydraulic cylinder is applied as the tilt angle adjusting unit360of the embodiment of the present invention, a cylinder main body381is fixed to the base unit100, withdrawing rods382may be fixed to the slope guide members320, and the slope guide members320may be adjusted while rotating forward and backward by forward and rearward movement of the withdrawing rods382.

A pedal type hydraulic pump383and a hydraulic tank384are provided on one side of the base unit100to supply an oil pressure to the cylinder main body381. Although not shown, a lever or button is provided at a position that the worker easily works to remove the oil pressure of the cylinder main body381, and thus the oil pressure supplied to the cylinder main body381may be removed as necessary.

The actuator-type tilt angle adjusting unit of the embodiment of the present invention may also control a lowering distance per unit weight of the work support200by controlling the tilt angles of the slope guide members320based on the worker's own discretion.

In the load-adjustable vertically moving scaffold10according to the present invention, as shown inFIG. 7, a transfer caster320is installed at a lower part of the base unit100, so the base unit100is supported by the transfer caster320. And thus, the worker may conveniently move the load-adjustable vertically moving scaffold10, in this case, the load-adjustable vertically moving scaffold10can be widely used in the same form as a trolley.

Another embodiment of a load-adjustable vertically moving scaffold20according to the present invention is illustrated inFIGS. 8 to 13.

Referring to the figures, the load-adjustable vertically moving scaffold20includes a base unit400, a work support500installed at an upper part of the base unit400to support objects to be processed, a lift supporting unit600, and a cover unit700supporting the work support500to vertically move with respect to the base unit400.

The base unit400is installed on a floor of the work place to support the lift supporting unit600and the work support500. Like the embodiment of the present invention, the base unit400includes a supporting member410provided to be simply supported on the floor of the work place and to be fixed to and installed on the floor of the work place through an anchor, a fixing bolt, or the like.

The work support500is installed on the upper part of the base unit400to be vertically moved by the lift supporting unit600, and is configured so that the objects to be processed are loaded or placed thereon for a work.

The work support500includes a lifting unit520lifted by the lift supporting unit600to be described below, a loading unit support530having one side fixed to the lifting unit520and extended toward the outside of the lifting unit520at a predetermined length, and a loading unit540coupled to the loading unit support530.

The loading unit support530includes a connector531which has one end fixed to the lifting unit520and is exposed to the outside of the cover unit700to be described below through a long hole710of the cover unit700, and a connecting plate532formed at an end part of the connector531. The loading unit540is coupled to the connecting plate532.

The loading unit540may load the objects to be processed and is connected with the lifting unit520through the loading unit support530. Therefore, when the objects to be processed are loaded on the loading unit540, a load is transferred to the lifting unit520, and thus the loading position of the objects to be processed are vertically moved while the lifting unit520is lowered or lifted.

The loading unit540, as shown inFIGS. 8 and 13, may be configured to support a box-shaped object to be loaded by including a support541formed at a lower part thereof and protrusion542formed at both edges thereof. Unlike this, as shown inFIG. 14, the support541may be extended in a lateral longitudinal direction. As shown inFIG. 15, the support541may be formed in a customized manner to correspond to shapes or sizes of the objects to be processed.

For example, when the objects to be processed are formed in cylindrical shapes, the cylindrical objects to be processed may not be loaded on the loading unit540that has a planar shape, and thus a semicircular groove may be formed on an upper surface of the loading unit540.

Since the loading unit540of the embodiment of the present invention may be attached or detached to the loading unit support530, the loading unit540may be manufactured in various shapes corresponding to the shapes of objects to be processed. The loading unit540having a shape appropriate to need is selected and is coupled to the loading unit support530, thereby increasing work convenience.

The lift supporting unit600supports the work support500to vertically move with respect to the base unit400.

The lift supporting unit600includes fixed guide members610extended upward from both sides of the base unit400, slope guide members620spaced apart from the fixed guide members610at a predetermined distance, a lift supporting shaft630moving along with the slope guide members620, and an elastic member640installed between the lift supporting shaft630and the work support500.

Hereafter, for convenience, a portion to which the fixed guide members610are installed is referred to as a rear side of the base unit400, and a direction in which the slope guide members620are installed with respect to the fixed guide members610is referred to as a front side.

The fixed guide members610are provided on both sides of a rear end part of the base unit400, respectively, and are extended upward from the base unit400in a vertical direction. First guide grooves611extended in a vertical longitudinal direction are each formed on two opposite surfaces of the fixed guide members610, and first guide rollers510installed on both sides of the rear side of the work support500are formed to move along the first guide grooves611.

As shown inFIG. 12, extension guide units650are extended from one side of each of the fixed guide members610at a predetermined length. Support bearings651are formed on both sides of the extension guide units650to move along the extension guide units650. The support bearing651is coupled to a bearing support plate652. The bearing support plate652is connected with an inner plate512on which a roller shaft511of the first guide rollers510moving along the first guide grooves611is supported. The support bearing651and the bearing support plate652are formed on the fixed guide members610and the extension guide units650to prevent the fixed guide members610from moving away from each other.

The slope guide members620are extended from front sides of the fixed guide members610to be tilted at a predetermined angle with respect to the fixed guide members610. That is, the slope guide members620are formed to be tilted in a direction away from the fixed guide members610while being extended downward from upper ends. The slope guide members620each have one upper one side rotatably coupled to a connecting member formed in each of the fixed guide members610, such that the slope guide members620may entirely be rotated at a predetermined angle with respect to a coupling point P.

Second guide grooves621are formed at opposite surfaces of the slope guide members620in a longitudinal direction, and the lift supporting shaft630is connected with the second guide grooves621to be lifted.

The lift supporting shaft630includes second guide rollers631formed on both sides thereof to move along the second guide grooves621, so the lift supporting shaft630may vertically move along the slope guide members620. The lift supporting shaft630supports a lower end of the work support500.

The elastic member640, which is an extension spring, has one end connected to a rear end of the work support500or a roller shaft511and the other end connected to the lift supporting shaft630.

Further, a gas cylinder is further provided at a lower part of the work support500to absorb shock. One side and the other side of the gas cylinder are each installed at the lift supporting shaft630and the front end of the work support500to prevent the work support500from being suddenly lowered or lifted due to sudden change in a load generated when the objects to be processed are suddenly loaded on or unloaded from the work support500.

In the lift supporting unit600, the slope guide members620are formed to be tilted in a direction away from the fixed guide members610while being extended downward from the fixed guide members610. Thus, when the objects to be processed are loaded on the work support500, the work support500is lowered while the elastic member640is elongated by the load of the objects to be processed. The work support500is stopped at a point that the load of the objects to be processed on the work support500and elastic force of the elastic member640are in equilibrium. When objects to be processed are additionally loaded, the work support500is further lowered to correspond to an increased load. Conversely, when the objects to be processed loaded on the work support500are unloaded, the work support500is lifted by the elastic force of the elastic member640while the load is reduced.

Since the work support500is automatically lowered or lifted depending on whether the load, applied to the work support500while the objects to be processed are loaded on or unloaded from the work support500, is changed, a worker may continue to work a predetermined height, thereby increasing work efficiency.

Also, the lift supporting unit600may further include a tilt angle adjusting unit660to control tilt angles of the slope guide members620.

As the tilt angles of the slope guide members620are adjusted by the tilt angle adjusting unit660, when the objects to be processed are loaded or unloaded, a lift distance per unit weight of the work support500may be adjusted. That is, when the slope guide members620have larger tilt angles than the fixed guide members610, a lowering distance per unit weight of the work support500is reduced. Conversely, when other slope guide members620are moved in a direction approaching the fixed guide members610, such that the tilt angles are reduced, the lowering distance per unit weight of the work support500is increased.

Therefore, when the objects to be processed are made of a material having a high specific gravity such as metal or stone, tilt angles of the slope guide members620are increased. When the objects to be processed are made of a material having a low specific gravity such as a synthetic resin, a fiber, or a paper box, the tilt angles of the slope guide members620are reduced. Thus, a lowering distance is controlled according to kinds of the objects to be processed.

The tilt angle adjusting unit660may be applied with an actuator installed in the base unit400.

In the case of the embodiment of the present invention, the tilt angle adjusting unit660is applied with the hydraulic cylinder. A cylinder main body661is installed in the base unit400, and a cylinder rod662is connected with the slope guide members620. And thus, the slope guide members620are rotated forward and backward through forward and rearward movement.

Although not shown, a fluid tank for supplying fluid and a hydraulic pump for supplying the fluid to a cylinder may be provided at the base unit400or a position adjacent thereto. The hydraulic pump may be formed in a pedal or lever type, and may include a separate switch for removing an oil pressure.

Also, not shown, an electric actuator may be applied as an actuator applied to the tilt angle adjusting unit660. When power is supplied, a motor is operated, and thus withdrawing rods are moved forward and backward to rotate the slope guide members620.

The tilt angle adjusting unit660of the embodiment of the present invention may allow a worker to arbitrarily select control of a lowering distance per unit weight according to the kinds or shapes of the objects to be processed to control the tilt angle of the slope guide members620.

Further, the slope guide members620may be extended in parallel to the fixed guide members610. In this case, when the slope guide members620are extended in parallel to the fixed guide members610, the elastic member640is not elongated as the work support500is not lowered, so the work support500is lowered down to a lowermost position by a self-load of the work support500without external force.

When the objects to be processed are loaded on the work support500while the objects to be processed are place on a floor of the work place, the objects to be processed may be easily loaded on the work support500after the work support500is lowered by controlling the slope guide members620to be extended in parallel to the fixed guide members610. After the loading is completed, by controlling the slope guide members620to have desired tilt angles, the work support500is lifted by elastic force of the elastic member640, and thus the worker may comfortably work while stretching his/her back.

Further, a sensor is attached to one side of the base unit400or the lift supporting unit600to sense the lowering of the work support500, and the sensor may automatically check a daily workload by automatically monitoring the number of descents of the work support500.

The cover unit700may be formed in a hexahedral shape surrounding the base unit400, the lift supporting unit600, and the lifting unit520. The long hole710is formed on one side of the cover unit700to be vertically extended, so the loading unit support530passes through the long hole710.

The loading unit support530may be vertically moved along the long hole710at a time of lifting of the lifting unit520.

The load-adjustable vertically moving scaffold according to the present invention described above maintains loading positions of the objects to be processed to a predetermined position by vertically moving the loading unit when the objects to be processed are loaded or unloaded, thereby improving waist health and work efficiency of the worker. Particularly, since the movement distance per unit weight of the loading unit240is arbitrarily selected by the worker, the load-adjustable vertically moving scaffold may be applied to various objects to be processed having a small specific gravity.

Descriptions of the described embodiments of the present invention will be provided so that those skilled in the art may use and practice the present invention. It will be clear to those skilled in the art that various modifications and improvements within the scope of the invention may be made. The general principles defined herein may be applied to other embodiments without departing from the gist of the invention. Thus, the present invention is not intended to be limited to the embodiments shown but is to be translated within the widest scope consistent with the principles and noble features described herein.

The load-adjustable vertically moving scaffold of the present invention may be used in various fields of industry, such as a manufacturing industry.