KR102507706B1 - A hand pallet truck having low centred structure - Google Patents

Abstract

The present invention relates to a hand pallet truck with a low-centered structure that erects a heavy-weight battery unit and a twin moving post adjacent to a truck wheel to prevent a hand pallet truck from tipping over, arranges a compressor unit rearward toward a handle so that the center of gravity is located toward the handle, and automatically blocks the function of a vacuum adsorption unit for loading and unloading a load when left and right casters are unbalancedly pressurized to ensure safety in loading and unloading the load and moving a pallet. The hand pallet truck with a low-centered structure according to the present invention comprises: forks (110, 120) for being inserted into a pallet on which cargo is loaded; a truck wheel (150) driven by an electric motor at the rear end of the forks (110, 120); a handle (160) provided with an operation unit for controlling the electric motor and raising and lowering the forks (110, 120); a battery unit (200) for supplying power to the electric motor to drive the truck wheel (150) or raise and lower the forks (110, 120); a vacuum adsorption unit (460) for vacuum adsorption to load and unload a load on the pallet; a compressor unit (250) for driving the vacuum adsorption unit (460); twin moving posts (310, 320) standing on the upper end of the battery unit (200) to transmit the pneumatic pressure of the compressor unit (250) to the vacuum adsorption unit (460); and a rotating arm (400) pneumatically connected to the moving posts (310, 320).

Description

Hand pallet truck having a low center of gravity structure {A HAND PALLET TRUCK HAVING LOW CENTRED STRUCTURE}

The present invention relates to a hand pallet truck having a low center of gravity structure, and more particularly, to prevent the hand pallet truck from overturning, while standing a heavy battery unit and a twin moving post adjacent to a truck wheel, the compressor unit is rearwardly disposed toward the handle A hand with a low center of gravity structure that secures safety in loading and unloading loads and moving pallets by automatically shutting off the function of the vacuum suction unit for loading and unloading loads when the left and right casters are biasedly pressurized while the center of gravity is positioned toward the handle. It's about pallet trucks.

A hand pallet truck refers to a manual logistics transport device used for short-distance movement of cargo. These hand pallet trucks are unloading equipment that can be easily used anywhere in cargo warehouses, factories, large marts, cargo terminals, distribution centers, etc. Some are driven by manpower, but most of them use electric motors as a power source, and they are easy to carry heavy cargo. It has the advantage of being able to handle, so it is often used with forklifts.

However, the conventional hand pallet truck has the advantage of being able to easily move the pallet on which the goods are loaded, but in order to get on and off the pallet, the operator must repeatedly perform the loading and unloading work of directly lifting and loading the goods, resulting in work fatigue. There was a problem that safety accidents frequently occurred due to the increase in loading and unloading work.

Accordingly, the present inventor has proposed a "loading cart device capable of lifting and lowering objects to be loaded by vacuum adsorption" through Korean Patent Registration No. 10-2310931 (October 01, 2021).

Looking at this in detail, a loading cart in which a moving wheel unit is installed on the ground and loaded objects are loaded on the upper side, and is configured to extend upward from the loading cart so that the operator can grip and tow the loading cart. A traction part, a hollow post part installed upright on the loading cart and connected via a flow pipe to a suction pump provided in the loading cart, communicating with the inside of the post part and rotatably on the upper side of the post part in the longitudinal direction. The hollow rotary arm to be installed, the internal communication through the joint drive part on one side of the rotary arm in the longitudinal direction, and the expansion pipe part rotatably mounted, and the extension pipe part installed at the end of the expansion pipe unit to adsorb the loading object. It is configured to include a suction part and a tube support part connected to the joint driving part and capable of supporting the expansion and contraction conduit part that is expanded and contracted by the manipulation of the suction part, and the moving wheel part is rotatable by the rotational operation of the traction part. It consists of a front wheel part installed on a lower surface in one direction of the loading cart, and a rear wheel part installed on a lower surface in the other direction of the loading cart spaced apart from the front wheel part by a predetermined interval. The front wheel part is on the lower surface of the loading cart. It may be composed of a rotation guide unit rotatably installed and connected to the traction unit, and a pair of front wheels installed on both sides of the rotation guide unit in the longitudinal direction, and the rear wheel unit is electrically driven installed on the lower side of the loading cart. device, and a pair of rear wheels rotatably installed on both sides of the electric drive device in the longitudinal direction, the separation distance between the pair of front wheels being shorter than the separation distance between the pair of rear wheels, An anti-tilt unit is installed on the lower side of the loading cart to prevent the loading cart from tilting to one side when moving in a state in which a loading object is loaded, and the anti-tilt unit is installed at four corners of the lower side of the loading cart. It consists of a fixed shaft extending in the direction of the ground, and a reinforcing wheel rotatably installed on the fixed shaft through a mounting bracket and having a shock absorber installed on the outer periphery.

The loading cart device capable of lifting and lowering the loading object by vacuum adsorption can improve work efficiency by applying a vacuum adsorption system to the loading cart on which the loading object is loaded so that the loading object can easily get on and off the loading cart. There are advantages to

However, it is difficult to use the loading cart as described above for pallets loaded with standardized and relatively heavy loads. In particular, cargoes that are biasedly loaded on loading carts or pallets are easily overturned, damaging items or causing physical damage to workers. There is a problem that the risk of is always implied.

In addition, the conventional hand pallet truck could not load and unload the load on the pallet like the present inventor's vacuum adsorption loading cart device, especially when a significant weight loaded on the pallet is shifted or biased during loading and unloading. There is a problem in that the pallet truck is in danger of tipping over.

The present invention has been proposed to solve the above problems, and the present invention extends the length of the fork for moving the pallet and places the compressor unit rearward toward the handle side while standing the high-weight battery unit and the twin moving post to correspond thereto. It is an object of the present invention to provide a hand pallet truck having a low center of gravity structure capable of securing safety during operation by preventing the hand pallet truck from overturning by placing the center of gravity toward the handle side.

In addition, the present invention automatically blocks the function of the vacuum suction unit for loading and unloading the load when the left and right casters are biasedly pressed when loading and unloading the load on the pallet, so that the hand having a low center of gravity structure can safely perform the loading and unloading operation of the load. There is a purpose of providing a pallet truck.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned above will be more clearly understood from the following description of preferred embodiments.

A hand pallet truck having a low center of gravity structure according to the present invention for achieving the above object includes forks 110 and 120 for inserting into a pallet on which cargo is loaded, and an electric motor at the rear end of the forks 110 and 120. A truck wheel 150 driven, a handle 160 provided with a control unit for controlling the electric motor and lifting the forks 110 and 120, and supplying power to the electric motor to the truck wheel 150 The battery unit 200 for driving or lifting the forks 110 and 120, the vacuum adsorption unit 460 for vacuum adsorption to lift and lower the load on the pallet, and driving the vacuum adsorption unit 460 A compressor unit 250 for performing the operation, and twin moving posts 310 and 320 standing on top of the battery unit 200 to transfer the air pressure of the compressor unit 250 to the vacuum adsorption unit 460, It includes a rotary arm 400 pneumatically connected to the moving posts 310 and 320, and the forks 110 and 120 have at least a length corresponding to the width of the battery unit 200 at their rear ends. The fork extension 130 is integrally connected, and the battery unit 200 includes a low center base 210 seated on an upper end of the fork extension 130 and a longitudinal direction of the low center base 210 It may include casters 240 mounted on both end surfaces via caster brackets 242 and post supports 230 coupled to upper ends.

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In one embodiment, the battery unit 200 includes a plurality of case poles 220 standing along the edge of the low center base 210, and a layer control table that moves up and down along the case pole 220 and is fixed. 222 and a post support 230 covering the upper end of the case pole 220.

In one embodiment, the low center base 210 has a fork insertion part 212 for being seated on the fork extension part 130 formed on the bottom surface, and the fork extension part inserted into the fork insertion part 212 ( 130) may include a fork rib 214 connected to the low center base 210 by bolts to be fastened so as to be mounted on the fork extension part 130.

As an example, the twin moving posts 310 and 320 may be erected and mounted on the post support 230 and transmit air pressure supplied through the compressor unit 250 to the vacuum suction unit 460. A pneumatic circuit is built in so that the rotary arm 400 is pneumatically connected to the upper end via the rotary part 420, and the rotary arm 400 is lifted between the twin moving posts 310 and 320. An elevating lifter 330 for lifting and a fixing table 340 for preventing rotation of the rotary arm 400 may be mounted in parallel with the elevating lifter 330 .

In one embodiment, the fixing table 340 is fixed to move up and down through a fixing bracket 343 for fixing to the upper end of the twin moving posts 310 and 320, and an insertion rod 346 formed at the tip of the upper end And, a fixing lever 341 fixed to the lower part of the lifter 330 via a lever bracket 342 and mounted to the lever bracket 342 so that the fixing table 340 can be moved up and down. The rotation unit 420 connected to the rotation arm 400 may include a disk-shaped fixing disk 344 on which fixing holes 345 are arranged in a circular shape at regular intervals.

In one embodiment, the compressor unit 250 is connected to the post support 230 and disposed rearward toward the handle 160, and the caster 240 lowers the forks 110 and 120 It may be configured to include a pressure sensor that is grounded to the ground and detects the pressure applied to the caster 240 .

As described above, according to the present invention, the cargo can be easily loaded and unloaded on a pallet by vacuum adsorption by the vacuum adsorption unit, thereby reducing worker's work fatigue and enabling efficient loading and unloading in a small space. .

In the present invention, when a pallet loaded with a large amount of cargo is moved, the length of the fork for moving the pallet is extended, and the center of gravity is reduced by arranging the compressor unit rearward toward the handle side while standing the high-weight battery unit and the twin moving post to correspond thereto. There is an effect that can be safely moved to a low-centered structure by positioning it on the handle side.

In addition, the present invention automatically blocks the function of the vacuum adsorption unit for loading and unloading the load when the left and right casters are biasedly pressed when loading and unloading the load on the pallet to safely perform the loading and unloading work of the load, thereby improving work efficiency and work convenience. increase can be expected.

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

1 is a hand pallet truck having a low center of gravity structure according to the present invention;
2 is a rear portion of a hand pallet truck having a low center of gravity structure according to the present invention;
3a and 3b are exploded perspective views of a hand pallet truck having a low center of gravity structure according to the present invention;
4 is a fixing means of a rotary arm in a hand pallet truck having a low center of gravity structure according to the present invention;
5 is a side configuration diagram of a hand pallet truck having a low center of gravity structure according to the present invention;
6 is a use state diagram of a hand pallet truck having a low center of gravity structure according to the present invention.

A hand pallet truck having a low center of gravity structure according to the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, various embodiments of the present invention will be described, but the technical idea of the present invention is not limited thereto and can be modified and implemented in various ways by those skilled in the art. In addition, the terms used in this specification are used to describe the concept of the present invention and its embodiments thereof, and are not intended to limit the present invention only to the dictionary or phraseological meaning of the term. For example, in this specification, singular expressions may include plural expressions unless the context clearly dictates otherwise. In addition, in this specification, terms such as "include" or "having" mean the presence of any configuration, step, operation, or combination thereof, and unless the context clearly indicates otherwise, the presence or absence of other configurations, steps, operations, or the like. Additions do not rule out the possibility.

Unless otherwise stated herein, "connected" or "connected" means that one element/feature is directly connected or connected to another element/feature or indirectly connected or connected through another element/feature. It may include, and does not necessarily mean only directly connected or connected mechanically. Accordingly, while the various schematic diagrams shown in the drawings illustrate exemplary arrangements of elements and components, additional intervening elements, devices, features or components may be used (assuming that the functionality of the depicted elements is not adversely affected). ) may exist in an actual embodiment.

On the other hand, in adding reference numerals to the components of the drawings, even if they are displayed on different drawings, the same components are to have the same numerals as possible, and it is judged that the gist of the present invention may be unnecessarily obscured. Detailed descriptions of known functions and configurations are omitted. Also, directional terms such as 'top', 'bottom', 'front', 'back', 'lead', 'front', 'rear', etc. are used in relation to the orientation of the disclosed figure(s). Because components of embodiments of the present invention may be positioned in a variety of orientations, directional terms are used for purposes of illustration and not limitation.

1 is a hand pallet truck having a low center of gravity structure according to the present invention, and FIG. 2 is a rear portion of the hand pallet truck having a low center of gravity structure according to the present invention.

As shown in FIGS. 1 and 2, the present invention includes forks 110 and 120 for inserting into a pallet on which cargo is loaded, and a truck wheel driven by an electric motor at the rear end of the forks 110 and 120 ( 150), a handle 160 provided with a control unit for controlling the electric motor and lifting the forks 110 and 120, a battery unit 200 for supplying power to the electric motor, and loads on the pallet. A vacuum adsorption unit 460 for vacuum adsorption to move up and down, a compressor unit 250 for driving the vacuum adsorption unit 460, and the air pressure of the compressor unit 250 to the vacuum adsorption unit 460 It is configured to include twin moving posts 310 and 320 standing on top of the battery unit 200, and a rotary arm 400 pneumatically connected to the moving posts 310 and 320 to deliver to the battery unit 200.

3a and 3b are exploded perspective views of a hand pallet truck having a low center of gravity structure according to the present invention.

In one embodiment, the forks 110 and 120 are formed by further connecting fork extensions 130 of a length corresponding to at least the width of the battery unit 200 to their rear ends. The forks 110 and 120 must have a length into which at least 2/3 of the length of the pallet is inserted in order to safely lift the pallet. Therefore, in the present invention, the fork extension 130 having a length corresponding to the width of the battery unit 200 is inserted to have the forks 110 and 120 connected integrally.

Here, the fork extension part 130 is preferably bent into a digit shape so that the link 116 for lifting the fork wheels 112 and 122 fastened to the front ends of the forks 110 and 120 is accommodated.

The battery unit 200 supplies power to the electric motor to drive the truck wheel 150 or elevate the forks 110 and 120 .

In one embodiment, the battery unit 200 includes a low center base 210 seated on an upper end of the fork extension 130, and a plurality of case poles standing along the edges of the low center base 210 ( 220) and a post support 230 covering the upper end of the case pole 220.

The low center base 210 has a fork insertion part 212 for being seated on the fork extension part 130 formed on the bottom surface, and the inside of the fork extension part 130 inserted into the fork insertion part 212. Including the fork ribs 214 connected with the low center base 210 by bolts, it is fastened to be mounted on the fork extension part 130.

Casters 240 are mounted on both end surfaces of the low center base 210 in the longitudinal direction via caster brackets 242.

In the battery unit 200, batteries 255 may be stacked in multiple layers, and the height of each layer is determined by a layer control table 222 that moves up and down along the case pole 220 and is fixed, and the battery unit ( 200) is configured to include a battery control panel 226 for uniformly supplying power to the battery 255.

The battery unit 200 as described above allows the hand pallet truck according to the present invention to have a low center of gravity by arranging the battery 255 having a significant weight adjacent to the truck wheel 150.

4 is a fixing means for a rotary arm in a hand pallet truck having a low center of gravity structure according to the present invention, and FIG. 5 is a side view of the hand pallet truck having a low center of gravity structure according to the present invention. 3 to 5 omits the moving post 320 on one side of the twin moving posts 310 and 320 for convenience of description.

The post support 230 is mounted with the twin moving posts 310 and 320 standing upright.

The twin moving posts 310 and 320 have a built-in pneumatic circuit to transfer the air pressure supplied through the compressor unit 250 to the vacuum adsorption unit 460.

The upper ends of the twin moving posts 310 and 320 are fastened so that the rotary arm 400 is pneumatically connected via the rotary part 420 . That is, the rotary arm 400 can freely rotate with respect to the twin moving posts 310 and 320 while receiving air pressure from the compressor unit 250 .

An elevation lifter 330 is mounted between the twin moving posts 310 and 320 to elevate the rotary arm 400 . That is, the height of the rotary arm 400 can be adjusted through a control unit mounted on the handle 160 . Here, the lifting lifter 330 may employ a gear type or pneumatic type lifter, but is not limited thereto.

Meanwhile, a fixing table 340 for preventing rotation of the rotary arm 400 is mounted in parallel with the elevating lifter 330 .

The fixing table 340 is fixed to move up and down through a fixing bracket 343 to be fixed to the upper end of the twin moving posts 310 and 320, and an insertion rod 346 is formed at the peak of the upper end.

The lower part of the fixing table 340 is fixed to the lower part of the lifting lifter 330 via a lever bracket 342, and the fixing lever 341 is rotated on the lever bracket 342 to lift the fixing table 340 up and down. installed so that it can be

On the other hand, a disk-shaped fixed disk 344 is mounted on the rotary part 420 connected to the rotary arm 400, and fixing holes 345 are arranged in a circular shape at regular intervals in the fixed disk 344.

Therefore, when the fixing lever 341 is rotated downward, the fixing table 340 moves upward, and the insertion rod 346 located at the peak of the fixing table 340 is formed on the fixing disk 345. It is inserted into the fixing hole 345 to prevent rotation of the rotary arm 400 .

Here, since the lever bracket 342 is fastened and fixed to the rod of the lifter 330, the fixing lever 341 and the fixing table 340 move up and down together as the lifter 330 moves up and down. .

A rotating part 410 is mounted on the other end of the rotary arm 400 and is pneumatically connected to the vacuum suction part 460 and is rotatably connected to the vacuum suction part 460 . Here, it is preferable that the rotating part 410 and the vacuum adsorption part 460 are connected via a flexible expansion pipe 450 . Therefore, the vacuum adsorption unit 460 can adsorb the load freely by the expansion and contraction of the extension tube 450 and unload the load onto the pallet.

Meanwhile, a fixing means capable of restricting the flow of the expansion tube 450 may be mounted at one end of the rotary arm 400 . In other words, when the expansion tube 450 is not used, the expansion tube 450 is rotated to the same position as the rotary arm 400 and then the front end of the expansion tube 450 is fixed through the fixing means. can be made

The compressor unit 250 is connected to the post support 230 and disposed rearward toward the handle 160 . The compressor unit 250 is coupled so that the compressor 255 is seated on the rear support 252 and provides air pressure to the vacuum adsorption unit 460 .

Therefore, in the present invention, while the heavy battery unit 200 and the twin moving posts 310 and 320 stand on the low center base 210, the compressor unit 250 is rearranged toward the handle 160 so that the center of gravity is toward the handle. position to prevent the hand pallet truck from overturning to ensure safety during operation.

In one embodiment, when the forks 110 and 120 are lowered, the casters 240 are grounded to the ground to prevent the hand pallet truck from tipping over according to the present invention.

In addition, when the left and right casters 240 are biasedly pressurized when loading and unloading a load on a pallet, the function of the vacuum suction unit for loading and unloading the load is automatically blocked so that the loading and unloading work of the load can be safely performed.

Here, a pressure sensor is mounted on the caster 240 to detect when the pressure acting on the caster 240 is biased, or when the caster 240 floats in the air due to a biased pressure. It is possible to prevent the overturning of the hand pallet truck according to the present invention by detecting.

6 is a use state diagram of a hand pallet truck having a low center of gravity structure according to the present invention.

Let's look at the operation of the hand pallet truck having a low center of gravity structure according to the present invention configured as described above.

First, the hand pallet truck is moved by manipulating the handle 160 in the same manner as in the prior art. That is, the forks 110 and 120 are inserted into the pallet 500 by pressing the operation button provided on the handle 160 to move forward or backward and rotate to an appropriate position.

The pallet loaded with cargo can be moved to a desired location by inserting and lifting the forks 110 and 120 as described above.

On the other hand, the present invention can load and unload cargo on the pallet. In other words, after positioning the hand pallet truck having a low center of gravity structure according to the present invention at an appropriate location, the handle 160 is manipulated so that the caster 240 lands on the ground.

When the caster 240 lands on the ground, pneumatic pressure is applied to the vacuum adsorption unit 460 to vacuum the cargo so that cargo can be unloaded from the pallet.

Here, in case of any repetitive loading and unloading work, it is necessary to fix the rotary arm 400. That is, after moving the rotary arm 400 to a position to be fixed, the fixing lever 341 is operated so that the insertion rod 346 of the fixing table 340 is inserted into the fixing hole 345 of the fixing disk 344. do.

Therefore, the rotary arm 400 can perform cargo loading and unloading work using the vacuum adsorption unit 460 while being fixed at a certain position.

In addition, when the cargo adsorbed to the vacuum adsorption unit 460 has a considerable weight and there is a risk that the hand pallet truck is overturned, it is sensed through a pressure sensor mounted on the caster 240 and the vacuum adsorption unit ( 460) to prevent conduction in advance.

Meanwhile, in the present invention, even when moving a pallet loaded with cargo, as described above, the compressor unit 250 stands up with the heavy battery unit 200 and the twin moving posts 310 and 320 on the fork extension unit 130. ) is rearranged toward the handle so that the center of gravity is positioned toward the handle, so that the hand pallet truck can be safely moved while preventing it from overturning.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical spirit of the present invention in various forms. Therefore, these improvements and changes will fall within the protection scope of the present invention if they are obvious to those skilled in the art.

110, 120: fork 112, 122: fork wheel
114: hinge 116: link
130: fork extension 150: truck wheel
160: handle 200: battery unit
210: low center base 212: fork insertion part
214: fork rib 220: case pole
222: floor control bar 225: battery
226: battery control panel 230: post support
240: caster 242: caster bracket
250: compressor unit 252: rear support
255: compressor 310, 320: twin moving post
330: lifter 340: fixed stand
341: fixed lever 342: lever bracket
343: fixing bracket 344: fixing disk
345: fixing hole 346: insertion rod
400: rotating arm 410, 420: rotating part
450: expansion pipe 460: vacuum adsorption unit
500: pallet

Claims (9)

Forks 110 and 120 for inserting into a pallet on which cargo is loaded, a truck wheel 150 driven by an electric motor at the rear end of the forks 110 and 120, and controlling the electric motor and the forks 110, 120) and a battery unit 200 for driving the truck wheel 150 or lifting the forks 110 and 120 by supplying power to the electric motor. And, a vacuum adsorption unit 460 for vacuum adsorption to lift and lower the load on the pallet, a compressor unit 250 for driving the vacuum adsorption unit 460, and the air pressure of the compressor unit 250 to the vacuum The twin moving posts 310 and 320 standing on top of the battery unit 200 and the rotary arm 400 pneumatically connected to the moving posts 310 and 320 are used to transfer the power to the suction unit 460. include,
The forks 110 and 120 have a fork extension 130 integrally connected to the rear end of at least a length corresponding to the width of the battery unit 200,
The battery unit 200 is mounted via caster brackets 242 on both longitudinal end surfaces of the low center of gravity base 210 and the low center of gravity base 210 seated on the upper end of the fork extension 130. A hand pallet truck having a low center of gravity structure including a caster 240 and a post support 230 coupled to an upper end.
The method of claim 1,
The battery unit 200 includes a plurality of case poles 220 standing along the edge of the low center base 210, a layer control table 222 that is moved up and down along the case pole 220 and is fixed, , Hand pallet truck having a low center of gravity structure comprising a post support 230 covering the upper end of the case pole 220.
The method of claim 1,
The low center base 210 has a fork insertion part 212 for being seated on the fork extension part 130 formed on the bottom surface, and the inside of the fork extension part 130 inserted into the fork insertion part 212. A hand pallet truck having a low center of gravity structure fastened to be mounted on the fork extension part 130, including a fork rib 214 connected to the low center of gravity base 210 by bolts.
According to any one of claims 1 to 3,
The twin moving posts 310 and 320 are erected and mounted on the post support 230, and have a pneumatic circuit to transmit air pressure supplied through the compressor unit 250 to the vacuum suction unit 460. Is built in, and the upper end is fastened so that the rotary arm 400 is pneumatically connected via the rotary part 420,
An elevation lifter 330 for lifting the rotary arm 400 between the twin moving posts 310 and 320 and a fixing table 340 for preventing rotation of the rotary arm 400 are ) and a hand pallet truck with a low center of gravity structure mounted in parallel.
The method of claim 4,
The fixing table 340 is fixed so as to move up and down through a fixing bracket 343 for fixing to the upper end of the twin moving posts 310 and 320, and an insertion rod 346 formed at the peak of the upper end, and the lift It is fixed to the lower part of the lifter 330 via a lever bracket 342 and includes a fixing lever 341 mounted to the lever bracket 342 to elevate the fixing table 340,
The rotating part 420 connected to the rotary arm 400 has a low center of gravity structure comprising a disk-shaped fixing disk 344 in which fixing holes 345 are arranged and mounted in a circular shape at regular intervals. Hand pallet truck.
According to any one of claims 1 to 3,
The compressor unit 250 is connected to the post support 230 and disposed rearward toward the handle 160,
The caster 240 is grounded to the ground when the forks 110 and 120 are lowered and includes a pressure sensor for detecting the pressure acting on the caster 240. Hand pallet truck having a low center of gravity structure .
The method of claim 4,
The compressor unit 250 is connected to the post support 230 and disposed rearward toward the handle 160,
The caster 240 is grounded to the ground when the forks 110 and 120 are lowered and includes a pressure sensor for detecting the pressure acting on the caster 240. Hand pallet truck having a low center of gravity structure .
The method of claim 5,
The compressor unit 250 is connected to the post support 230 and disposed rearward toward the handle 160,
The caster 240 is grounded to the ground when the forks 110 and 120 are lowered and includes a pressure sensor for detecting the pressure acting on the caster 240. Hand pallet truck having a low center of gravity structure . delete

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