KR102358213B1 - Manual Lifter - Google Patents

Abstract

The present invention relates to a lifter for manually lifting and moving cargo, and more particularly to a manual lifter, comprising: a vertical rail stand supported by a main wheel; a lifting unit formed in front of the vertical rail stand and having a fork supporting a cargo; and a boarding unit capable of pressing the weight of an operator at the rear of the vertical rail stand, thereby capable of stably maintaining the balance of the lifter by offsetting the weight of the cargo applied to the lifting unit with the weight of the operator.

Description

Manual Lifter {Manual Lifter}

The present invention relates to a lifter for manually lifting and moving cargo, and more particularly, to a vertical rail supported by a main wheel; a lifting unit formed in front of the vertical rail stand and having a fork supporting the cargo; It relates to a manual lifter that can stably maintain the balance of the lifter by offsetting the weight of the cargo applied to the lifting unit with the weight of the operator, including; will be.

In general, a lifting device refers to a device that can be transported by lifting it to an arbitrary height in a state in which a heavy cargo is loaded using a pair of forks formed to protrude forward.

The conventional lifting device is provided with a fork for lifting the pallet on which the cargo is loaded.

The fork is provided to be raised or lowered by the elevating means, and the elevating means may be an electric type that generates power by supplying energy from the outside, such as a motor, or a worker directly rotates a roller on which the wire is wound. The lifting by tension can be done manually.

In the case of the manual lifting means in which a separate power supply is not supplied, the unit price is lower than that of the electric type, so it is used when a worker moves a relatively small weight cargo in a small material warehouse or a production site. The weight of the cargo handled by the manual lift device is usually for the low-weight cargo of about 70~150Kg.

The fork moves along a body frame having a length in the vertical direction. The body frame is provided with wheels in contact with the ground to support the lift device and the weight of the cargo from the ground, and to offset the weight of the cargo so as not to collapse or cause an unbalanced posture due to the weight of the cargo.

And a handle for moving and steering the body frame is provided, and the operator grips the handle and moves it to a desired position.

Looking at the operation of the lift device, a fork is inserted into a through hole formed to penetrate in all directions on a pallet for loading cargo, and the cargo is spaced from the ground by elevating the fork, and then tilted at a certain angle to the fork. By tilting the pallet supported by the lifter to the inside of the lifter, it supports not only the bottom but also the sides so that it can be stably balanced. Then, by using wheels to transport it to a certain distance, it is possible to transport cargo more conveniently and with less force.

On the other hand, in the case of a lift device that lifts cargo using such a fork, when a cargo exceeding the allowable weight that the lift device can handle is handled, an excessive load is applied to the front part where the cargo is supported, and the torque exceeds the static momentum of inertia. This can cause the lift device to fall forward and cause serious damage to the cargo.

As a configuration to prevent this, the lower frame provided with wheels among the bar body frames disclosed in Korean Patent Application Laid-Open No. 10-2020-0004994 is pulled out long in the front where the cargo is loaded, so that the load of the cargo is applied to the central part of the body frame. Torque does not occur due to the load, which greatly reduces the risk of overturning.

However, when the body frame is configured in this shape, the lower frame is usually jammed in handling cargo from the front, making it impossible to enter the lift device in a narrow space or inserting a fork into a pallet of cargo placed in a narrow space When loading, the cargo pallet may be handled in an unstable position because it is not deeply inserted, and serious damage may be caused when the cargo is dropped off.

The manual lift disclosed in Patent Registration No. 10-1060497 was intended to set the center of gravity of the lift device supporting the cargo to the rear by providing a space for loading a separate weight on the rear side in order to overcome the forward center of gravity of the cargo.

However, the structure of the rear of the lift device is complicated, and the volume is large, which makes storage and handling difficult, and thus the efficiency is lowered.

Therefore, the development of a manual lifter that can be produced in a small size to facilitate the handling of relatively small and relatively small cargo is emerging so that the center of gravity, which is biased forward due to the weight of the cargo, is located in the center to achieve a stable balance. .

KR 10-2020-0004994 (A) 2020.01.15. KR 10-1060497 (B1) 2011.08.24.

In order to solve the above problems, in the present invention, the operator controlling the lifter applies his or her weight to the boarding part while the fork provided long in the front of the lifter supports the cargo. It is to provide a manual lifter that can maintain the lifter's balance stably and significantly reduce the risk of overturning.

Another object of the present invention is to remove components other than the fork from the front of the lifter so that the fork can be smoothly inserted into the cargo pallet without being caught by an external structure, and to make the width of the boarding part thin enough for the feet of the occupant to be raised, and at the same time, in the vertical direction It is to provide a manual lifter that can be operated smoothly even in a narrow space by significantly reducing the volume by folding it with

Another object of the present invention is to configure the boarding unit with a fixed footrest fixed to the rear of the vertical rail stand and a telescopic footboard coupled to slide under the fixed footrest, and the telescoping footboard is moved forward and backward along the telescoping groove of the fixed footrest. It is to provide a manual lifter that can adjust the torque generated from the rear according to the weight of the cargo by adjusting the desired extension length and change the length of the lifter according to the size of the space in which the lifter is used.

Another object of the present invention is to provide a manual lifter capable of quickly and simply operating the movement and fixing of the telescopic scaffold by enabling the foot to operate the pressing part of the telescoping foot that is fastened to the telescoping groove of the fixed footrest.

Another object of the present invention is to provide a manual lifter that is easy to handle by reducing the volume when transporting, storing and carrying relatively small weight cargo by forming a footrest fixing part on the rear side of the vertical rail so that the boarding part can be mounted and fixed. will do

The present invention for solving the above object, in a manual lift device for transporting cargo, is supported by the lower main wheel 150, the vertical rail stand 100 formed in the vertical direction; a lifting unit 200 that ascends and descends along the vertical rail unit 100, and the fork 210 on which cargo is loaded protrudes toward the front; It is formed horizontally at the rear of the vertical rail stand 100 , is pressed by the weight of the operator, rotates in the same direction as the main wheel 150 , and an auxiliary wheel 426 having a smaller diameter than the main wheel 150 is the rear end. Includes; boarding unit 400 provided in the.

In addition, the boarding unit 400 of the present invention is coupled by folding to the vertical rail stand (100).

In addition, the boarding unit 400 of the present invention includes a fixed footrest 410 in which an expansion and contraction groove 411 is formed in the longitudinal direction in the central portion; And disposed under the fixed footrest 410, the pressing portion 421 passing through the telescoping groove 411 protrudes to the upper portion of the fixed footrest 410, and along the telescoping groove 411, Includes a telescopic foot plate 420 that moves backward.

In addition, in the expansion and contraction groove 411 of the present invention, the fixing groove 412 and the movable groove 413 having a width (b) smaller than the diameter (a) of the fixing groove 412 are alternately formed; The pressing part 421 has a fixing part 424 having the same diameter (d3) as the diameter (a) of the fixing groove 412 at the lower part, and the width of the moving groove 413 on the upper part of the fixing part 424 . A moving part 423 having the same diameter (d2) as (b) is formed, and the engaging part 422 having a larger diameter (d1) than the diameter (a) of the fixing groove 412 is formed on the upper part of the moving part 423 . ) is formed.

In addition, the fixing part 424 of the pressing part 421 of the present invention passes through the fixing groove 412 of the expansion and contraction groove 411 but does not penetrate the moving groove 413 .

In addition, on the rear surface of the vertical rail 100 of the present invention, a passage hole 161 having a larger diameter than the locking part 422 and a fastener 162 having a smaller diameter than the locking part 422 on the upper part of the passage hole 161 ) is provided so as to elevate the footrest fixing part 160 is formed.

In addition, the boarding unit 400 of the present invention is formed in a flat plate shape so that the operator rises and presses between the main wheel 150 and the auxiliary wheel 426 .

In the manual lifter according to the present invention, the operator controlling the lifter applies his or her weight to the boarding part in a state where the fork provided long in front of the lifter supports the load, so that the center of gravity of the lifter is located in the center, thereby balancing the lifter. It can be maintained stably and has the advantage of significantly lowering the risk of conduction.

In addition, the present invention removes components other than the fork from the front of the lifter so that the fork is smoothly inserted into the cargo pallet without being caught by an external structure, and forms the width of the boarding part thin enough to raise the rider's feet and folds it in the vertical direction It has the advantage of being able to operate smoothly even in a narrow space by greatly reducing the volume by making it possible.

In addition, the present invention is composed of a fixed footboard fixed to the rear of the vertical rail stand and a telescoping foot that is coupled to slide under the fixed footrest, and the telescoping foot is moved forward and backward along the telescoping groove of the fixed footrest so that the desired expansion and contraction By adjusting the length, the torque generated from the rear can be adjusted according to the weight of the cargo, and the length of the lifter can be varied according to the size of the space where the lifter is used.

In addition, the present invention has an advantage in that it is possible to quickly and conveniently operate the movement and fixation of the telescopic footrest by enabling the foot to operate the pressing part of the telescopic footrest fastened to the telescopic groove of the fixed footrest.

In addition, the present invention has the advantage of easy handling by reducing the volume when transporting, storing and carrying relatively small weight cargo by forming a footrest fixing part on the rear surface of the vertical rail so that the boarding part can be mounted and fixed.

1 is an overall perspective view of a manual lifter of the present invention;
2 is a view showing the folding operation of the boarding part of the manual lifter of the present invention, (a) is a side view of the boarding part unfolded, (b) is a side view of the boarding part folded and fixed to the footrest fixing part.
3 is a view showing a state of adjusting the length of the boarding part in the manual lifter of the present invention, (a) is a plan view of the elongated state to have a maximum length, (b) is a plan view of a contracted state to have a minimum length.
Figure 4 is an exploded perspective view showing the configuration of the boarding part in the manual lifter of the present invention.
5 is a view showing the operating state of the pressing part in the manual lifter of the present invention, (a) is a cross-sectional view in a state raised by the elastic force of the spring, (b) is a cross-sectional view in a state lowered by an external force applied by an operator.
Figure 6 is a side view of a state in which the operator is boarded in the manual lifter of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them.

1 to 6, the manual lifter according to the present invention is a lifting device for transporting a cargo to be handled to another place,

a vertical rail stand 100 supported by the lower main wheel 150 and formed in the vertical direction;

a lifting unit 200 that ascends and descends along the vertical rail unit 100, and the fork 210 on which cargo is loaded protrudes toward the front;

It is formed horizontally at the rear of the vertical rail stand 100 , is pressed by the weight of the operator, rotates in the same direction as the main wheel 150 , and an auxiliary wheel 426 having a smaller diameter than the main wheel 150 is the rear end. Includes; boarding unit 400 provided in the.

In the manual lifter of the present invention, a lifting unit 200 having a non-electric fork 210 that is operated by receiving external power is coupled to a wire, and the wire is directly wound to lift the lifting unit 200 mechanically. It is a lifting device provided for handling, such as lifting, transporting, etc., a relatively light-weight cargo in a manual operation coupled with a .

The vertical rail unit 100 is formed to be long in the vertical direction, and a main wheel 150 for supporting the vertical rail unit 100 in contact with the ground is provided at the lower portion to move to a place where the cargo is to be transported after loading. can do it

The cargo is loaded on the fork 210 disposed in the front part of the vertical rail unit 100 . The fork 210 protrudes forward in the horizontal direction so as to lift the pallet loaded with the cargo. The fork 210 is coupled to the elevating unit 200 and elevates along the longitudinal direction of the vertical rail stand 100 so that the cargo is loaded on the fork 210 and then elevated to a desired height and transported.

When the cargo is loaded on the fork 210, the lifter is formed with a center of gravity biased forward, so the balance may be unstable. Accordingly, a boarding part 400 is provided at the lower part of the rear of the vertical rail stand 100 so that an operator who drives the lifter of the present invention can board and presses the body weight to the boarding part 400 .

The boarding part 400 is coupled to the rear surface of the vertical rail stand (100). Therefore, since the weight of the operator is carried on the back with respect to the vertical rail 100, the weight of the cargo and the weight of the operator are offset, so that the center of gravity of the lifter can be located in the center.

Therefore, since the center of gravity of the lifter is held toward the vertical rail stand 100, the load of the lifter, which is the weight of the cargo plus the weight of the operator, is stably supported on the ground by the main wheel 150, and the operation performance is also improved when transporting the cargo. is improved

As shown in Figure 1, in the manual lifter according to the present invention, the vertical rail stand 100 is formed to be long in the vertical direction. Since the vertical rail stand 100 has a stroke range in which the elevating unit 200 to be described later moves up and down, the height of the vertical rail unit 100 can be sufficiently long to position the elevating unit 200 high. However, since the manual lifter according to the present invention handles cargo of relatively small weight and holds the center of gravity with the weight of the operator, if the height of the vertical rail stand 100 is raised so that the boarding part 400 can be raised too high, the balance becomes unstable. It is recommended to form a height within a safe range because there is a concern about the falling of the cargo or the overturning of the lifter.

The width of the vertical rail stand 100 is formed smaller than the shoulder width of the operator, so that even when driving in a narrow space, it is not caught by the external structure. For a stable structure, the width of the vertical rail stand 100 is preferably formed to be smaller than the wheel distance of the main wheel 150 to be described later.

The vertical rail stand 100 is a configuration located at the center of the manual lifter of the present invention, and serves as a center point of the load applied to the lifter. Since the weight of the cargo is pressed in the front around the vertical rail 100 and the weight of the operator is pressed in the rear, the center of the load applied to the lifter approaches the center of the vertical rail 100. Therefore, the weight is applied based on the vertical rail stand 100 so that the balance of the manual lifter of the present invention is well maintained, so that the driving stability is improved when the lifter is operated during the transport of cargo.

It is preferable that the self-load of the vertical rail stand 100 is also somewhat heavy. When loading cargo on the fork 210 in front of the vertical rail 100, the center of gravity is pressed toward the front of the lifter, but in the case of pressing the weight of the operator to the boarding unit 400 at the rear of the vertical rail 100 Because it is variable and fluctuates greatly, the center of gravity is shifted forward at the beginning of loading.

Therefore, the vertical rail 100 is formed with sufficient weight to reduce the risk of overturning when loading the cargo on the fork 210 before the operator presses the weight on the boarding unit 400. The weight offsets the forward center of gravity.

Thereafter, the operator presses the body weight to the boarding unit 400 , and a load is added to the rear of the vertical rail stand 100 , so that a stable balance can be maintained. However, since the weight of the operator fluctuates rather than being constantly maintained on the boarding unit 400 during the transportation of cargo, the self-load of the vertical rail stand 100 is determined to maintain the center of gravity to remain in the center even when the lifter moves. Formed above and maintained in balance.

A rail groove 130 is formed in the vertical rail stand 100 in the longitudinal direction. The rail groove 130 may be formed on both sides and the front surface of the vertical rail stand 100 . The lifting unit 200 to be described later can move up and down in the rail groove 130 and is coupled so that the lifting unit 200 does not fall out of the rail groove 130 .

A gripper 110 is provided on the upper rear surface of the vertical rail stand 100 . It is preferable that the holding part 110 protrude in the width direction of the vertical rail stand 100 and spread to about the width of a worker's shoulder.

Since the gripper 110 is coupled to the vertical rail stand 100 , the operator can hold the gripper 110 to support the lifter. And, when transporting the cargo, holding the gripper 110 and steering the vertical rail 100 to move in a desired direction.

A lifting handle 120 is provided on the rear surface of the vertical rail stand 100 at a lower portion of the gripper 110 . The lifting handle 120 is connected to a wire roller (not shown) inside the vertical rail stand (100). When winding or unwinding the wire roller (not shown), hold the lifting handle 120 and rotate it. One side of the wire (not shown) is coupled to a wire roller (not shown), a pulley (not shown) provided on the upper portion of the vertical rail stand 100 is caught, and the other end is coupled to the lifting unit 200 to be described later.

When the lifting handle 120 is rotated, a wire (not shown) is gradually wound around a wire roller (not shown) and the lifting unit 200 is raised toward a pulley (not shown). Also, when the lifting handle 120 is rotated in the opposite direction, the lifting unit 200 descends. Due to this lifting action, the lifting unit 200 is easy to handle, such as lifting or laying down the loaded cargo.

A main wheel 150 in contact with the ground is provided at a lower portion of the vertical rail stand 100 . The main wheels 150 are provided one on each side of the vertical rail stand 100 , and the wheel distance between the main wheels 150 is formed to be larger than the width of the vertical rail stand 100 . Even if the center of gravity of the vertical rail unit 100 moves, it is located between the main wheels 150 , so the main wheel 150 stably supports the manual lifter of the present invention.

However, since the width of the vertical rail stand 100 is not too large, the wheel distance of the main wheel 150 is not too wide. Therefore, the manual lifter of the present invention has a relatively thin width and can be operated smoothly without jamming even when loading or transporting cargo in a narrow space.

An auxiliary wheel 426 to be described later along with the main wheel 150 is located at the rear of the main wheel 150 . The auxiliary wheel 426 is located at the rear end of the boarding unit 400 , and since the weight of the operator riding the boarding unit 400 is located at an interaxial distance between the main wheel 150 and the auxiliary wheel 426 , the occupant The weight of the lifter is pressed to the inside of the lifter, and the main wheel 150 and the auxiliary wheel 426 distribute and support the weight of the operator, so that a stable balance can be achieved.

A footrest fixing part 160 that can be fixed to the vertical rail rest 100 is formed on the rear surface of the vertical rail unit 100 when folding of the boarding unit 400 to be described later. The footrest fixing part 160 is coupled to the rear surface of the vertical rail stand 100 so that it can be moved up and down slightly. The footrest fixing part 160 slightly protrudes from the rear side of the vertical rail stand 100 toward the rear.

The footrest fixing part 160 has a passage hole 161 formed with a larger diameter than the diameter d1 of the locking part 422 of the pressing part 421 to be described later, and the diameter d1 of the locking part 422. A small fixture 162 is formed, and the passage hole 161 and the fixture 162 communicate with each other.

When the boarding part 400 is folded, the boarding part 400 is disposed in a vertical direction, and the pressing part 421 is positioned toward the rear surface of the vertical rail stand 100 . Slightly lift the scaffold fixing part 160 upward so that the stopping part 422 of the pressing part 421 passes through the passage hole 161, and when the scaffold fixing part 160 goes down, the stopping part ( Since the 422 is positioned on the fixture 162 and caught, the boarding part 400 may be fixed in a vertically folded state.

The footrest fixing part 160 may be formed with an open bottom surface. The passage hole 161 communicates with the open bottom surface and can accommodate the locking part 422, but is not limited thereto, and the passage hole 161 is not formed and only the fixture 162 is formed while being caught through the open bottom surface. It may be formed to accommodate the portion 422 . When the footrest fixing part 160 is folded, it is sufficient if it has a shape that holds the locking part 422 and maintains and fixes the folded state.

1 and 2, the elevating unit 200 coupled to the rail groove 130 of the vertical rail stand 100 and sliding along the longitudinal direction of the vertical rail stand 100 is a front towards the fork 210 is formed.

The fork 210 is formed in the shape of a pair of forks to load cargo. The fork 210 is inserted into a through hole formed in the pallet on which the cargo is loaded, and when the fork 210 is raised by the lifting unit 200, the cargo is placed on the upper surface of the fork 210 while lifting the pallet. this is supported

The fork 210 is a configuration that directly supports the cargo, and is formed in the shape of a pair of forks protruding forward, but is not limited thereto. It can also be expanded to various shapes that can accommodate cargo, such as a plate shape that can be placed.

The fork 210 may be raised or lowered by the lifting unit 200 after the cargo is accommodated. The lifting unit 200 is coupled by a wire (not shown) inside the vertical rail stand 100 , and when the wire (not shown) applies a tensile force upward, it rises along the vertical rail stand 100 , and the tensile force When released, the lifting unit 200 descends and the fork 210 also descends.

The wire (not shown) is partially immersed in a pulley (not shown) on the upper part of the vertical rail stand 100 , and then wound around a wire roller (not shown) connected to the lifting handle 120 . Accordingly, the lifting unit 200 may move up and down by winding the lifting handle 120 .

Therefore, when the cargo is loaded on the fork 210, the lift handle 120 is rotated to raise the cargo to be separated from the ground, and the lifter of the present invention is transported to the destination to be transported and then the lift handle 120 is to be disembarked. ) to lower the cargo by rotating it in the opposite direction.

The lifting unit 200 is inserted into the rail groove 130 formed in the longitudinal direction perpendicular to the vertical rail stand 100 and moves up and down. The rail groove 130 is formed with concave grooves on both sides and the front portion of the vertical rail stand 100 , and the lifting unit 200 is inserted into the concave rail groove 130 and coupled so as not to fall out.

Since the lifting unit 200 is inserted into the rail grooves 130 formed on both sides of the vertical rail stand 100, it is prevented from being separated to the side, and the cargo is loaded on the fork 210 and the center of gravity biased toward the front is formed on the front side of the rail. The lifting unit 200 inserted into the groove 130 can withstand it.

As shown in FIGS. 1 and 2 , a ground support 300 in contact with the ground is formed at a lower portion of the vertical rail support 100 . The ground support 300 may be coupled to the lower portion of the vertical rail 100 and protrude in a fork shape toward the front.

The ground support 300 is provided as a pair, one on each side of the vertical rail 100, the bottom surface is in contact with the ground, the front end is located in front of the vertical rail (100). The ground support 300 is formed such that the distance between the pair of ground support 300 increases toward the front end.

The ground support 300 prevents the forward center of gravity when the cargo is loaded on the fork 210 from being overturned. The main wheel 150 in the lower part of the vertical rail unit 100 is in contact with the ground, and the ground support 300 is further protruded forward to come into contact with the ground. It is possible to reduce the rotational torque generated from the cargo loaded on the fork 210 by moving from the wheel 150 to the front end of the ground support 300 , thereby significantly reducing the risk of overturning.

In addition, since the ground support 300 is formed to have a wider width as it goes forward, when the center of gravity is moved left and right while the manual lifter of the present invention is operating, the ground support 300 is supported to improve driving stability. do.

As shown in FIGS. 1 to 6 , the boarding unit 400 coupled to the rear surface of the vertical rail stand 100 rotatably allows a worker to handle and transport cargo while driving the manual lifter of the present invention. is a space to

The boarding part 400 is formed in a flat plate shape so that the operator climbs and presses it between the main wheel 150 and the auxiliary wheel 426 .

Accordingly, as the weight of the operator is applied to the boarding unit 400 , a load is added to the rear, and the center of gravity of the manual lifter of the present invention is gathered at the central portion where the vertical rail stand 100 is located.

If the fork 210 is loaded with cargo, there is a risk that the lifter will be overturned to the forward biased center of gravity. The proximity to the center improves the stability of the manual lifter of the present invention.

As shown in FIG. 2 , the boarding part 400 is rotatably coupled to the vertical rail stand 100 so that it can be folded. When loading a cargo of a relatively small weight on the fork 210 , it is possible to prevent overturning only with the main load of the lifter and the ground support 300 without adding the weight of the operator.

Since the boarding part 400 is folded to reduce the volume for free operation even in a narrow space, the operator does not get caught in the boarding part 400 located at the rear of the lifter, and comfortable cargo transportation is possible.

A footrest fixing part 160 for fixing the folded state of the boarding part 400 is provided on the rear surface of the vertical rail stand 100 . Therefore, even when transporting cargo using the lifter of the present invention, the boarding unit 400 maintains the folded state, so that there is no safety risk such as sudden fall and harm to the body of the worker.

3 and 4, the boarding part 400 is configured in two stages so that the length can be adjusted. It consists of a fixed footrest 410 coupled to the vertical rail stand 100 and a telescopic footrest 420 that is disposed under the fixed footrest 410 and moves to slide forward and backward. The pressing part 421 of the telescopic footboard 420 is inserted into the telescoping groove 411 formed in the fixed footrest 410 to move along the telescoping groove 411 .

Reinforcing bars 414 are formed on both sides of the fixed foot plate 410 . The reinforcing bar 414 is formed to be higher in the vertical direction toward the front. When the weight of the operator is placed on the boarding part 400, flexural stress is maximally applied to the front end of the boarding part 400, which may cause cracks or fractures. ) is formed at the front end of the fixed scaffold 410 to lower the bending stress to form a stable structure.

A telescopic groove 411 through which the pressing part 421 of the telescoping foot 420 to be described later passes is formed in the central portion of the fixed footrest 410 . The expansion and contraction grooves 411 are formed long in the front and rear, and the fixing grooves 412 and the moving grooves 413 having different diameters are alternately formed.

The diameter (a) of the fixing groove (412) is smaller than the diameter (d1) of the engaging part 422 of the pressing part 421 to be described later, the diameter of the fixing part 424 of the pressing part 421 ( greater than or equal to d3). When the fixing part 424 is positioned in the fixing groove 412 , the telescopic footboard 420 to be described later is fixed without being expanded or contracted, so that the length of the entire boarding part 400 is maintained.

The moving groove 413 formed following the fixing groove 412 has a width (b) smaller than the diameter (d3) of the fixing part 424 of the pressing part 421 to be described later. It is formed to be greater than or equal to the diameter d2 of (423). After pressing the pressing part 421, which will be described later, the fixing part 424 located in the fixing groove 412 moves downward and the moving part 423 is located in the fixing groove 412, and then the moving groove 413 is closed. Through this, it is possible to come and go through the expansion and contraction grooves 411 of the fixed footrest 410 . That is, the moving part 423 moves forward and backward along the expansion and contraction groove 411 of the fixed foot plate 410 . In addition, the width of the moving groove 413 is formed smaller than the diameter of the fixing portion 424 of the pressing portion 421 to be described later.

The telescoping groove 411 restricts the movement of the telescoping foot 420 in the fixed groove 412 and allows it to move to another fixed groove 412 through the moving groove 413, so that the length of the telescoping foot 420 is to be able to adjust

The telescopic footboard 420 disposed under the fixed footrest 410 is configured to adjust the length of the boarding unit 400, and is formed to have a length equal to or slightly longer than the length of the fixed footrest 410. can do.

Auxiliary wheels 426 are provided at the rear end of the telescopic scaffold 420 . The auxiliary wheel 426 is configured to contact the ground in the same way as the main wheel 150, and when a worker gets on the boarding unit 400, the body weight is divided and distributed with the main wheel 150 to be supported from the ground. make it possible Therefore, the operator rides on the boarding unit 400 at a position between the main wheel 150 and the auxiliary wheel 426 .

The telescoping foot 420 is formed with a pressing portion 421 inserted into the telescoping groove 411 of the fixed footrest 410 . The pressing part 421 is a configuration for controlling the state in which the telescoping foot 420 is coupled with the fixed foot 410 by pressing with the operator's foot. ) is moved to the rear to extend the length of the boarding unit 400 , and when it is moved forward, the telescopic footboard 420 moves forward to contract the length of the boarding unit 400 .

The pressing part 421 has a cylindrical shape having different diameters depending on the height, and a fixing part 424 is formed at the lowermost end, and the diameter d3 of the fixing part 424 is formed on the upper part of the fixing part 424 . ), a moving part 423 having a smaller diameter d2 is formed, and a locking part 422 having a larger diameter d1 than the diameter d2 of the fixed part 424 is formed on the upper portion of the moving part 423 . ) is formed.

The fixing part 424 located at the lower end of the pressing part 421 is a part to be coupled to the fixing groove 412 in the expansion and contraction groove 411 of the fixing foot 410, and is slightly smaller than the fixing groove 412. Or form the diameter to be the same.

When the fixing part 424 is positioned in the fixing groove 412 , since it is tightly fitted in the fixing groove 412 , the telescoping foot 420 is fixed to the fixing foot 410 and does not move. And, since the fixing part 424 has a diameter d3 that is larger than the width b of the movable groove 413 of the expansion and contraction groove 411, it cannot pass through the movable groove 413.

When the pressing part 421 is pressed in this state, the fixing part 424 is located under the expansion and contraction groove 411 , and the moving part 423 is located in the expansion and contraction groove 411 . Since the moving part 423 has a diameter d2 smaller than the diameter a of the fixing groove 412 of the expansion and contraction groove 411 and is formed to be equal to or smaller than the width b of the moving groove 413 , It may pass through the moving groove 413 .

Accordingly, as the moving part 423 moves along the longitudinal direction of the telescopic groove 411 , the telescoping foot 420 provided with the pressing part 421 slides and moves, and the length of the boarding part 400 can be adjusted. .

The locking part 422 formed on the upper part of the moving part 423 is formed at the uppermost end of the pressing part 421 and becomes a part that an operator steps on with their feet.

Since the diameter d1 of the locking part 422 is larger than the diameter a of the fixing groove 412 of the expansion and contraction groove 411, it cannot penetrate through the expansion and contraction groove 411 and is caught. Accordingly, the locking part 422 is caught on the fixed foot plate 410 to prevent the telescopic foot 420 from being separated from the fixed foot plate 410 and maintain the coupled state.

In addition, the locking portion 422 is caught on the footrest fixing portion 424 disposed on the rear surface of the vertical rail (100). When the boarding part 400 is folded and folded, the locking part 422 is positioned at the same height as the footrest fixing part 160 . At this time, the footrest fixing part 160 is slightly lifted upward so that the passage hole 161 of the footrest fixing portion 160 is positioned at the same height as the locking part 422, and the passage hole 161 is the locking part 422. Since it is formed larger than the diameter (d1) of the engaging portion 422 passes through the passage hole 161 and is inserted into the footrest fixing portion 160, the moving portion 423 of the pressing portion 421 passes through the passage hole 161. ) is located in

When the lifted footrest fixing part 160 is lowered downward, the moving part 423 located under the locking part 422 is located in the fixture 162 , and the fixture 162 is the diameter of the locking part 422 . (d1) is formed in a smaller diameter than the engaging portion 422 cannot pass through the fixture 162, so that the boarding portion 400 is fixed to the footrest fixing portion (160).

In addition, a spring 425 may be provided to restore the initial height when the force for pressing the pressing part 421 downward is removed. The spring 425 is provided between the bottom surface of the telescoping foot 420 and the bottom surface of the pressing part 421, and provides an elastic force to recover to the original height when the worker is stepping on the pressing part 421 with his foot. is the composition

If the operating state of the pressing part 421 is comprehensively described, initially the fixing part 424 is inserted into the fixing groove 412 of the expansion and contraction groove 411 so that the expansion and contraction foot 420 does not move and the fixed foot 410 ) is fixed to

Afterwards, if the length of the boarding unit 400 is to be adjusted, the operator presses the pressing part 421 with his/her foot. At this time, the part on which the operator's foot steps becomes the upper surface of the locking part 422 .

The pressing portion 421 is lowered due to the pressure, but is caught while contacting the upper surface of the fixing foot 410 so that the locking portion 422 does not penetrate the expansion and contraction groove 411 . Accordingly, the elastic footrest 420 provided with the pressing part 421 maintains the coupled state without being separated from the fixed footrest 410 .

When the pressing part 421 is pressed with a foot, the fixing part 424 is separated from the fixing groove 412 and is located at the lower part, and the moving part 423 located under the locking part 422 is located in the expansion and contraction groove 411. Located. The diameter (d2) of the moving part 423 is smaller than the diameter (a) of the fixing groove 412 of the expansion and contraction groove 411, and is smaller than or equal to the width b of the moving groove 413. As such, the moving part 423 passes through the moving groove 413 to move forward and backward of the expansion and contraction groove 411 . At this time, it can be moved with the feet of the operator stepping on the upper surface of the pressing part (421). Therefore, convenience is improved because the operator can easily operate with his or her feet without having to bend down or use a hand to adjust the length of the boarding unit 400 .

When the moving part 423 moves along the longitudinal direction of the telescopic groove 411 , the telescoping foot 420 also moves together, so that the length of the boarding part 400 can be adjusted. When the moving part 423 is positioned in any one of the fixing grooves 412 among the plurality of fixing grooves 412 and the force pressed by the foot is removed, the pressing part 421 is fixed due to the elasticity of the spring 425 . The fixing part 424 of the pressing part 421 in the lower part of the groove 412 rises again to be located in the fixing groove 412 , and the moving part 423 rises to the upper part of the fixing groove 412 .

The fixing part 424 of the pressing part 421 penetrates the fixing groove 412 of the expansion and contraction groove 411 but does not penetrate the moving groove 413 . Therefore, since the fixing part 424 is caught in the fixing groove 412 , it is impossible to move the telescopic foot 420 any more, and the length of the boarding part 400 is fixed.

Since the length of the boarding part 400 is simply adjusted by pressing the pressing part 421 with the foot, the convenience of length adjustment is improved.

In addition, it is possible to adjust the torque generated by the weight of the operator by appropriately adjusting the length of the boarding part 400 according to the weight loaded on the fork 210, so that cargos of various weights can be handled with the manual lifter of the present invention. can

For example, since the risk of overturning is reduced when loading cargo of a relatively small weight, the boarding unit 400 can be folded and positioned vertically and then fixed with the footrest fixing unit 160 and the lifter can be operated, or boarding In a state where the length of the part 400 is minimized, the lifter can be operated while the operator puts only one foot on the ground and pushes the ground with the other foot.

When the weight of the cargo is heavy, since the center of gravity is biased forward, the length of the boarding unit 400 is maximally extended, and then the operator presses the weight to the rear end of the boarding unit 400 to increase the torque and By maximizing the torque in the opposite direction, the risk of overturning can be greatly reduced.

The manual lifter according to the present invention is a lifter that transports small cargo having a relatively small weight, and is provided with a boarding unit 400 capable of pressing the weight of the operator at the rear of the vertical rail 100 to increase the loading capacity. there are advantages to

The boarding part 400 is provided to be adjustable in length, so that the operator can easily expand and contract the boarding part 400 with his or her feet. convenience is excellent.

100: vertical rail stand 110: grip portion 120: lifting handle 130: rail groove
150: main wheel 160: footrest fixed part 161: pass through 162: fixed
200: lifting unit 210: fork 300: ground support
400: boarding part 410: fixed footrest 411: expansion groove 412: fixed groove 413: movable groove 414: reinforcing bar
420: extension foot 421: pressing part 422: locking part 423: moving part 424: fixed part 425: spring
426: auxiliary wheel

Claims (7)

A manual lift device for transporting cargo, comprising:
a vertical rail stand 100 supported by the lower main wheel 150 and formed in the vertical direction;
a lifting unit 200 that ascends and descends along the vertical rail unit 100, and the fork 210 on which cargo is loaded protrudes toward the front;
It is formed horizontally at the rear of the vertical rail stand 100 , is pressed by the weight of the operator, rotates in the same direction as the main wheel 150 , and an auxiliary wheel 426 having a smaller diameter than the main wheel 150 is the rear end. Includes; boarding unit 400 provided in
The boarding unit 400 is
Fixed footrest 410 in which the expansion and contraction groove 411 is formed in the longitudinal direction in the central portion; and
It is disposed under the fixed footrest 410, and a pressing portion 421 passing through the telescoping groove 411 protrudes to the upper portion of the fixed footrest 410, and front and rear along the telescoping groove 411. Including a telescopic scaffold 420 that moves to
manual lifter.
According to claim 1,
The boarding part 400 is coupled to the vertical rail stand 100 by folding.
manual lifter.
delete According to claim 1,
The expansion groove 411 is
The fixing groove 412 and the moving groove 413 having a width (b) smaller than the diameter (a) of the fixing groove 412 are alternately formed;
The pressing part 421 is
A fixed portion 424 having the same diameter (d3) as the diameter (a) of the fixing groove 412 at the lower portion, and the same diameter as the width (b) of the moving groove 413 on the upper portion of the fixing portion 424 ( The moving part 423 of d2) is formed, and the engaging part 422 with a diameter d1 larger than the diameter a of the fixing groove 412 is formed on the upper part of the moving part 423.
manual lifter.
5. The method of claim 4,
The fixing part 424 of the pressing part 421 passes through the fixing groove 412 of the expansion and contraction groove 411 but does not penetrate the moving groove 413 .
manual lifter.
5. The method of claim 4,
On the rear side of the vertical rail stand (100)
A footrest fixing part 160 having a passage hole 161 having a larger diameter than the locking part 422 and a fixture 162 having a smaller diameter than the locking part 422 on the upper part of the passage hole 161 is provided so as to be raised and lowered.
manual lifter.
According to claim 1,
The boarding part 400 is formed in a flat plate shape so that a worker climbs and presses it between the main wheel 150 and the auxiliary wheel 426 .
manual lifter.

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