KR102116654B1 - Apparatus for lifting a fruit box - Google Patents

Abstract

The present invention relates to an apparatus for ascending and descending a fruit box, which comprises: a body frame; a plurality of pneumatic support units arranged spaced apart from each other on an upper surface of the body frame, and including a linear piston and a cylinder; a box holder coupled to an upper end of the pneumatic support units to vertically move in accordance with a change in the vertical length of the pneumatic support units, and having a fruit box seated thereon; an elastic member having one end coupled to the box holder to continuously apply a tensile force for moving the box holder upward; an air inflow and outflow pipe connected to one side of the cylinder of the pneumatic support units; and an air valve mounted on the other end of the air inflow and outflow pipe and controlling on/off of air discharge in the pneumatic support units. According to the present invention, a fruit box can be held and discharged, and the height of the fruit box can be adjusted by using a pneumatic pressure without additional power.

Description

Fruit box lifting device {Apparatus for lifting a fruit box}

The present invention relates to a fruit box elevating device, in detail, it is possible to mount and discharge the fruit box, and proposes an elevating device capable of adjusting the height of the fruit box using air pressure without additional power.

Agriculture is nationally important in terms of providing food for the people, maintaining livelihoods of related farmers, and ensuring economic activity in the region, and needs support through policy development and environmental improvement so that agriculture can continuously develop.

Agricultural products include vegetables, such as cabbage and radish, and various fruits, in addition to grains such as rice and barley, which are staple foods. The harvesting method varies depending on the harvest time and growth characteristics of each crop. Grain or vegetables are not very different in terms of commodity according to the harvesting method, so it is also possible to use some machines, but it is common to harvest fruits directly by manpower so that they are not damaged in the harvesting process. Fruits grown in orchards or plastic greenhouses in the open land usually have a short shelf life, so they must be harvested and distributed quickly at the appropriate harvest time for the fruits. It is also happening a lot.

In Jeju, a variety of field crops are produced, but the main products such as Noji Tangerine, Hallabong, Red, and Cheonhyeyang are actively produced, and many people are involved in harvesting citrus fruits from autumn to spring. As with other crop production and harvesting processes in Jeju, citrus fruits are mainly harvested by older farmers, and mostly by older women.

Looking at the citrus harvesting task, first, the fruit is separated from the citrus tree with scissors (FIG. 1A), and the separated fruit is first placed in the basket (FIG. 1B), and when the basket is filled, the fruit is secondarily put in the fruit box (FIG. 1c), the fruit box is moved and stored in a warehouse or delivered to a distribution center.

The reason why the citrus harvest basket and fruit box are used in parallel in such a harvesting operation is that a large number of citrus fruits are hung on a single citrus tree (500 to 600 pieces per citrus tree), and citrus trees are cited in citrus fields. This is because it is difficult to harvest and move citrus fruits from the beginning with a fruit box. In addition, temporary harvesting of citrus in a citrus basket that is easier to carry and move, rather than picking citrus while standing, and putting citrus in a fruit box at the bottom, may give convenience to the harvester even temporarily.

However, the sequential use of citrus baskets and fruit crates will increase the labor cost by requiring a tangerine picking manpower and a moving manpower of the harvested citrus fruits in the overall harvesting operation. You will face difficulties. In addition, in the harvesting of citrus fruits, the basket or fruit box is usually placed on the floor, and the manpower harvesting puts the citrus fruits separated from the citrus trees. There are many repeated bends of putting citrus fruits in the basket. If you throw a citrus into the basket without bending your waist, the outer surface of the citrus will be damaged and the product will deteriorate.

Putting tangerines in a fruit basket or a fruit box by bending the waist has become a major factor that hinders the rapid distribution of citrus fruits by increasing the fatigue and reducing the efficiency of citrus harvesting. In particular, repeated bending of the waist for the elderly women is not only physically hard, but also can cause joint-related diseases such as the waist and knees, so it is urgent to improve the working environment related to citrus harvest.

When the fruit basket is in the ground or in a low position, when standing and picking oranges, the damage of the fruit is proportional to the height of the basket and human hand. Used to decrease. This method has the effect of temporarily reducing the height difference between the basket and the harvester's upper body at one point, but it is inconvenient to move the empty box every time given the characteristics of the task of constantly moving the harvest position, and the empty box depends on the height difference of the harvester. There is a limit that cannot fit the height of. Also, when the fruit is full in the basket, there is still the inconvenience of carrying a heavy basket and moving to the fruit box to fill the fruit box with citrus fruits.

A fruit box lifter has been proposed in which a previously harvested fruit is placed in a box and moved to a conveyor belt at a place where a sorting machine or a processing machine is installed (registration utility model 20-0164874). It has been proposed (Public Patent 10-2018-0093226). These prior arts can be employed in some parts of mechanized fruit cultivation facilities or in orchards that are planted with wide fruit tree spacing without being pushed.However, from the top to the bottom of the citrus tree, the fruit is lush and the citrus tree is severely pushed. There is a limit to the application to the citrus field.

As a result, there is a need for a new citrus harvesting method capable of improving citrus harvesting tasks, which are difficult for an elderly woman, and minimizing the bending of the waist, and the development of an aid for citrus harvesting.

The present invention was created under the above technical background, and an object of the present invention is to provide a lifting device capable of loading fruit in a fruit box without bending the waist.

Another object of the present invention is to provide a device capable of raising and lowering without separate power and adjusting the height according to the height of the operator.

Another object of the present invention is to provide a fruit box lifting device that can be easily installed and moved in an indoor orchard or a field orchard, such as a vinyl house.

Another object of the present invention is to eliminate the inconvenience of using the basket and the fruit box in parallel during the citrus harvesting process, improve the harvesting efficiency, and provide a fruit box lifting device for convenient loading and moving of the fruit.

Other, other objects and technical features of the present invention will be presented in more detail in the following detailed description.

In order to achieve the above object, the present invention is a body frame; A plurality of pneumatic support parts which are arranged spaced apart from each other on the upper surface of the body frame and include a linear piston and a cylinder; A box holder that is coupled to the top of the pneumatic support and moves vertically according to a change in the vertical length of the pneumatic support, where the fruit box is seated; An elastic member having one end coupled to the box holder to continuously apply a tensile force to move the box holder upward; An air inlet and outlet pipe connected to one side of the cylinder of the pneumatic support; It is mounted on the other end of the air inlet and the air valve for controlling ON / OFF air discharge in the pneumatic support; provides a fruit box lifting device comprising a.

In the fruit box lifting device of the present invention, the overall vertical length of the pneumatic support is changed by moving the piston in the vertical direction with respect to the cylinder according to the inflow or outflow of air into the cylinder with one end of the piston inserted in the cylinder. . Specifically, when a load is applied to the box holder, the air valve may be opened to discharge air in the cylinder and the air valve may be closed to stop air discharge from the cylinder. In addition, air may be introduced into the cylinder by opening the air valve in a state where there is no load on the box holder and moving the box holder upward by the restoring force of the elastic member.

In the present invention, the air outlet pipe is preferably connected in parallel to the outlet of each cylinder of the plurality of pneumatic support, in this case the air valve may be mounted to the end of the air outlet pipe.

In the present invention, the upper surface of the main frame is inclined in one direction, and in this case, it is preferable that a plurality of rollers are disposed on the upper surface of the main frame. In addition, one end is connected to the upper surface of the body frame and the other end may further include an inclined rail or an inclined plate that provides an inclined discharge passage by touching the ground.

In addition, the fruit box lifting device of the present invention is preferably equipped with a wheel that can be moved and rotated on the lower surface of the main frame.

According to the present invention, it is possible to move up and down the fruit box without electric or mechanical power such as a motor or a pump, and when the fruit box is full during the fruit harvesting operation, the height of the fruit box can be lowered by the load, and the loaded fruit is completed. The fruit crate can be easily transported by naturally discharging the crate along the bottom slope of the hoist.

Through such an elevating device, the height of the fruit box can be adjusted to suit the physical condition of the operator, and the operation of repeatedly bending the waist can be minimized by elevating the fruit box in conjunction with the fruit harvesting operation. In addition, severe pain applied to the lower back in the process of moving the fruit basket or the fruit box can be eliminated. Therefore, it is possible to provide a working environment suitable for fruit harvesting for the elderly women, and to reduce the labor and fatigue, which are inevitable during the fruit harvesting process.

The fruit box lifting device of the present invention can be easily operated by the fruit harvesting manpower, and is easy to install even when the moving space is narrow due to the compaction of the fruit tree. The fruit basket is primarily used and secondary in the existing fruit harvesting operation. By eliminating the inefficiency of using a fruit box, it is possible to greatly improve the working efficiency of fruit harvesting. As a result, a large amount of fruits can be harvested with a small labor force, and a large amount of fruits can be quickly distributed, and it can also contribute to scientific farming through linkage with other agricultural equipment.

1A to 1C are photos showing a conventional citrus harvesting process
Figure 2 is a schematic perspective view showing the fruit box lifting device according to the present invention
Figure 3 is a perspective view showing the air outlet of the fruit box lifting and lowering device
4a and 4b are schematic diagrams and photographs showing the elevation of the pneumatic support.
5A and 5B are schematic diagrams and photographs showing a descending state of a pneumatic support
Figure 6 is a schematic view showing another embodiment of the elastic member
7 is a schematic view showing an air inlet and outlet pipe arranged in parallel with the pneumatic support
8 is a schematic view showing a sliding portion of the upper surface of the main frame

The present invention proposes a lifting device capable of mounting and discharging a fruit box and adjusting the height of the fruit box using air pressure without additional power.

The fruit box lifting and lowering device of the present invention can reduce the volume and weight of the entire device by lifting and lowering the fruit box by air pressure and elasticity without electric or mechanical power, such as a motor or a pump, and is easy to operate and prevents troubles and has durability. great.

In addition, the fruit box lifting and lowering apparatus of the present invention supports the fruit box through a plurality of pneumatic supports, while controlling the air flow in and out of the cylinder with an ON / OFF type air valve controlling the vertical length change of the pneumatic support. It can be adjusted to suit the conditions.

In addition, the fruit box lifting and lowering device of the present invention, in the process of changing the vertical length of the pneumatic support, the air inlet and outlet pipes connected in parallel to the plurality of pneumatic support and integrated control of the air flowing in or out through the air outlet tube On the other hand, by connecting the elastic member to the top of the pneumatic support, it is possible to prevent the pneumatic support from suddenly rising or falling, and accordingly, it is possible to safely move the fruits loaded in the fruit box and to ensure the safety of the fruit harvester during operation. Can do it.

Figure 2 is a schematic view showing the fruit box lifting device 100 according to the present invention as a whole, according to the body frame 110, and a plurality of pneumatic support 120 is disposed on the upper surface of the body frame.

The body frame may be formed of, for example, a metal pipe or the like, and may be designed as a rectangular frame structure or a mesh structure, and may further include a separate inclined upper surface as described below, if necessary. In addition to the pneumatic support, a wheel 170 for movement of the device may be attached to the body frame, and an air inlet pipe and an air valve, which will be described later, may be combined or embedded.

At least one pair of pneumatic support parts are spaced apart from each other, and in this embodiment, two pairs of pneumatic support parts are spaced apart at equal intervals and symmetrically arranged. Each pneumatic support includes a linear piston 121 and a cylinder 122. Each piston and cylinder may be made of, for example, metal or plastic, and may include separate means for maintaining airtightness so that there is no air leakage when the piston moves in the vertical direction according to the air in and out of the cylinder. An air outlet (see FIGS. 4A and 122A) is formed on one lower side of the cylinder.

A box holder 130 is coupled to the top of the pneumatic support. The box holder is a thin bar-shaped structure that is supported by two pneumatic supports (specifically, the top of the piston) and moves horizontally along with changes in the vertical length of the pneumatic support while maintaining horizontality. In the fruit box is settled, the fruit box is moved up or down according to the vertical position change of the box holder. In this embodiment, in the pneumatic support unit, the structure in which the piston is disposed on the lower part of the piston is described as an example, but if necessary, the device may be configured with a structure in which the cylinder is disposed on the upper part and the piston is disposed on the lower part. The box holder may be coupled to the top surface of the cylinder.

An elastic member 140 is coupled to one end of the box holder. This elastic member serves to apply a tensile force to move the box holder upward. One end of the elastic member is fixed to the box holder and the other end is fixed to the side of the cylinder, for example, so that the elastic member can continuously exert a force pushing the piston upward relative to the cylinder. Due to the tensile force of the elastic member, the pneumatic support portion basically receives a force to move the piston upward from the cylinder. As described later, when the piston moves upward by the elastic member in the state where the air valve is opened, the cylinder Air can flow in naturally. Due to the restoring force of the elastic member, the elevating device of the present invention can raise the box holder in the vertical direction without additional power.

In this embodiment, a torsion spring is used as an elastic member, and a pair of torsion springs, one for each pneumatic support, exerts an elastic force due to the twisting action, and applies a vertical upward force to the box holder. If necessary, a compression spring or a tension spring may be used instead of the torsion spring. In this case, the structure may be changed for the upward movement of the piston (resulting in the box holder) through the restoring force of the elastic member. For example, it will be described later.

A plurality of wheels 170 are mounted on the lower surface of the main frame. The wheel is suitable for a type that can be moved and rotated to facilitate movement of the lifting device in an orchard with uneven ground.

The pneumatic support portion is connected to the air outlet and inlet pipe 150 on one side of the cylinder, for example, the outlet of the lower side of the cylinder. 3 is a perspective view showing the air inlet and outlet pipes of the fruit box elevating device, each pneumatic support is connected to one air outlet pipe, and the other end of the air outlet pipe is air that controls ON / OFF air discharge in the pneumatic support portion The valve 160 is mounted. By operating the ON / OFF switch 161 of the air valve, it is possible to control the inflow of air to the air intake or outflow of air from the air inlet, and accordingly, the inflow and outflow of air into the cylinder of each pneumatic support is integratedly controlled. can do. The vertical length change of a plurality of pneumatic supports is simultaneously controlled by connecting one air outlet tube to each cylinder integrally, that is, in parallel, and installing one air valve at the end of the air outlet tube, which will be described later.

In the fruit box lifting and lowering apparatus of the present invention, the overall vertical length of the pneumatic support is changed by moving the piston in the vertical direction with respect to the cylinder as the inflow or outflow of air into the cylinder while one end of the piston is inserted into the cylinder of the pneumatic support. .

Figure 4a is a schematic view showing the lifting state of the pneumatic support, the box holder 130, the fruit box is not mounted or there is no load transmitted from the seated fruit box, the above-described air valve is switched to the ON state and the air outlet and inlet When this is opened, the piston 121 and the box holder are moved upward by the restoring force of the elastic member 140, and air is introduced into the cylinder 122 through the outlet 122a in this process. FIG. 4B shows a state in which the piston and the box holder are lifted up while the torsion spring is restored and the fruit box is seated as a prototype of a hoisting device temporarily manufactured to aid understanding. When the air valve is switched to the OFF state in the process of air inflow, the air supplied to the air inlet and cylinder is blocked, so that the vertical height of the piston does not increase any more and maintains the height at the time of shutoff.

Figure 5a is a schematic view showing a descending state of the pneumatic support, when the fruit box (B) is seated on the box holder and the fruit (C) is loaded on the fruit box, when the load occurs, the air valve is opened to open the air outflow inlet pipe, As the air in the cylinder is discharged, the height of the fruit box decreases as the piston and the box holder move downward. In this process, the torsion spring, which is the elastic member 140, is reduced in vertical height by a twisting motion. 5B shows that the torsion spring is twisted when the box holder and the piston are lowered assuming that the weight of the fruit box is increased in the aforementioned prototype. In the process of discharging air, the air valve can be closed to stop air discharge in the cylinder, and air discharged from the air inlet pipe and cylinder is blocked so that the vertical height does not decrease any more and the piston maintains the height at the time of blocking. do.

Thus, the fruit box lifting device according to the present invention basically supports the load of the fruit box with air pressure in the cylinder, and controls the height of the pneumatic support part by changing the relative lengths of the cylinder and the piston according to the inflow or exhaust of air in the cylinder. do. By adopting an ON / OFF type air valve using a simple one-touch switch, the cylinder pressure can be precisely controlled. When the air valve is OFF, the inside of the cylinder can maintain a vacuum state or an air inflow state. When the air valve is closed after the air in the cylinder is exhausted, the inside of the cylinder becomes a vacuum state, and the piston from the cylinder is restored by the restoring force of the elastic member. It will suppress the force to move vertically and maintain the shortest height. In this state, the height of the piston can be controlled through ON / OFF control of the air valve.

6 is a schematic view showing another embodiment of the elastic member. In the previous embodiment, unlike the upward force applied to the box holder by the torsional action of the torsion spring, the upward force is applied to the box holder using the tension spring 141. To this end, an elastic member holder 142 is provided on the body frame and one end of the tension spring is fixed to the elastic member holder, while the other end of the tension spring can be coupled to the box holder. In the state contracted by the elastic force of the first tension spring, the box holder 130 maintains the maximum height, and when the load applied to the box holder increases (with the air valve described above open), the tension spring increases. The height of the box holder is lowered (130a). Thereafter, when the load applied to the box holder is removed, the box holder can be restored to the original height again by the restoring force of the tension spring.

As a result, it will be understood that there is only a difference in the structure or arrangement of the elastic force restoring method of the elastic member and the means for fixing the elastic member, and the basic operation is similar when compared with the embodiment employing the torsion spring described above.

In the present invention, the restoring force of the elastic member (torsion spring or tension spring, etc.) allows the air to flow into the cylinder to adjust the height of the pneumatic support, and the elastic member prevents sudden lifting and lowering to prevent safety accidents. Contribute to Basically, the elastic member allows air to flow into the cylinder by its own restoring force while the air valve is open, and as a result, it is possible to change the height of the pneumatic support without additional power such as a motor or a pump. In addition, the elastic member releases air in the cylinder by opening the air valve while the weight of the fruit box is increased, and when the fruit box descends in the direction of gravity by its own weight (due to the restoring force of the elastic member), the force in the opposite direction is applied. By holding it, the descending speed of the fruit box is elastically relaxed. As a result, the fruit box is suddenly lowered to prevent an impact on the fruit loaded in the fruit box, and it is possible to prevent an unexpected accident that may be caused to the fruit harvester.

In the present invention, the air inlet and outlet pipes are connected in parallel to the outlets of each cylinder of the plurality of pneumatic support portions as described above, and the air valve is mounted at the end of the air outlet pipe. 7 is a schematic view showing an air inlet and outlet pipe arranged in parallel with a pneumatic support.

The piston having one end inserted into the cylinder moves in the vertical direction according to the air in and out of the cylinder. By connecting in parallel to each cylinder through one air outlet pipe 150, the air flow (F) flowing through the air valve 160 is divided into the same amount (F1 to F4) into each cylinder and then flows into each piston. The vertical movements (M1 to M4) of the are controlled integrally.

In addition, by vertically connecting one air outlet pipe to each cylinder, the vertical operating speed of the piston relative to the cylinder can be adjusted. That is, the inflow amount of air is divided from one air inlet pipe to each cylinder, so that the rise rate of the piston is reduced compared to the series connection. Conversely, as the amount of air discharged from the plurality of cylinders is integrated into one air outlet pipe, the descending speed of the piston is also reduced compared to the individual series connection. As a result, the rapid change in the length of the pneumatic support is prevented by preventing the rapid inflow and exhaust of air, and the length change operation of the pneumatic support is slowed, thereby doubling the device safety for the elderly female worker participating in fruit harvesting. In addition, by connecting the air inlet and outlet pipes in parallel to each cylinder outlet, it is possible to more precisely and comprehensively control the in-cylinder air discharge according to the ON / OFF operation of the air valve, and accordingly the box holder (resulting in the fruit box ) Can be easily adjusted to fit the fruit harvester's physical conditions.

On the other hand, in addition to the parallel connection of the air inlet and outlet pipes, the diameter W2 of the air outlet pipes may be smaller than the diameter W1 of the cylinders, thereby further assisting in controlling (relaxing) the air inflow velocity in the cylinders.

In citrus harvesting, the method using the fruit box lifting device of the present invention is as follows.

The elastic member maintains the initial restoring force, that is, the air valve is switched to the ON state, and air is introduced into each cylinder by opening the air inlet and outlet pipes. In this state, the box holder remains elevated, and the air valve is appropriately controlled to control the amount of air entering the cylinder and the height of the piston (resulting box holder), that is, the height of the fruit box, to the physical condition of the fruit harvester. Adjust to fit. For example, if the piston and the box holder rise as the air enters the cylinder with the restoring force of the elastic member open, the air valve can be closed to keep the box holder at the desired height by closing the air valve when it reaches the appropriate height. In addition, when the air in the cylinder is excessively introduced and the upper end of the fruit box is positioned higher than the height of the harvester, the air valve is opened by pressing the fruit box directly or by putting some fruit in the fruit box and maintaining the load. The height of the piston and box holder can be lowered by discharging air.

In this state, the tangerines are picked from the citrus tree, and the harvested fruits are placed in a fruit box. When the location of the harvest changes in the citrus tree, the harvesting operation can be continued by pushing or pulling the lifting device by hand. Through this method, it is possible to reduce the inconvenience and hassle of filling the fruit basket in the existing fruit basket first, and secondarily bending the fruit filled in the basket to the fruit box.

When fruit is fully loaded in the fruit box, the load of the fruit box increases, and a force is applied in the direction of gravity. When the air valve is opened in this state, the air in the cylinder is discharged and the vertical length of the pneumatic support is reduced, so the fruit box is the main body. It will descend toward the top of the frame. The lowered fruit box can be moved to another place while being loaded in the elevating device, or the fruit box can be discharged separately and moved to another place.

When discharging the fruit box, the manpower is not directly lifted, but the force can be reduced by discharging it by sliding. 8 is a schematic view showing a sliding portion of an inclined structure provided on an upper surface of the main frame, the upper surface 112 of the main frame is inclined in one direction, and a plurality of rollers 113 are disposed on the upper surface of the main frame. In addition, due to the roller on the upper surface of the main body frame, the fruit box B can be easily discharged from the device by moving in a horizontal direction with little force. The sliding portion of the inclined structure may be integrally manufactured to the body frame, or may be mounted detachably to be mounted on the upper surface of the body frame.

On the other hand, when the lower surface of the body frame is raised to a certain height from the ground due to wheels or the like, the fruit box may be discharged while impacting the fruit due to collision with the ground. In order to alleviate such an impact, the main frame may be used by arranging the inclined rail or the inclined plate 115 adjacent to the sliding portion. The inclined plate may be manufactured by folding one end connected to the side of the main frame and the other end contacting the ground to provide an inclined discharge passage.

In the present invention, a basic structure such as a body frame, a pneumatic support, or a box holder can be made of a hard metal such as aluminum in consideration of weight, and a slope, a roller, and a wheel wheel on the upper surface of the body frame can be made of plastic. In addition, cylinders or air outlet pipes of the pneumatic support can be made of plastic, if necessary.

The fruit box lifting device according to the present invention is easy and simple one-touch ON / OFF air valve operation, height adjustment and lifting operation are possible, so men and women of all ages can use, and especially elderly women who are not good at complicated and difficult operation It is suitable for farmers, and it can relieve the pain and health condition caused by long-time work and repeated bending at the time of harvest.

In addition, by using a plurality of cylinders, it is possible to move up and down regardless of the weight of the fruit box, and it is possible to appropriately adjust the height according to the height of a person or a tree in the fruit harvesting process. Assuming that the fruit loading weight of a typical fruit box is 20 kg, if more than 5 kg is shared by a total of 4 cylinders, sufficient support can be achieved even if the material of the cylinder is lightened or the volume is reduced. Accordingly, it is possible to reduce unnecessary labor and improve the working environment for fruit harvesting, while minimizing fruit damage occurring during the harvesting process. The time (or distance) that the harvested fruit falls into the box and the degree of damage to the fruit are proportional, as well as the process of moving from the fruit basket to the fruit box is reduced, and the height of the fruit box is increased to reduce the distance between the harvester's hand and the fruit box. By reducing fruit damage and shortening the process of the harvesting process, more fruit harvesting with improved quality is possible.

The elevating device of the present invention can be utilized not only as a height-adjustable fruit box support, but also as a wagon for carrying fruit boxes. In addition, it can be effectively applied to the harvest of various fruits grown in fruit trees such as apples, pears, grapes, peaches, tomatoes, kiwis, as well as citrus fruits.

The present invention has been exemplarily described through preferred embodiments, but the present invention is not limited to such specific embodiments, and various forms within the scope of the technical idea suggested in the present invention, specifically, the scope of the claims. Can be modified, changed, or improved.

100: elevating device 110: body frame
112: slope 113: rotating roller
115: inclined plate 120: pneumatic support
121: piston 122: cylinder
130: box holder 140: elastic member (torsion spring)
141: elastic member (tensile spring) 142: elastic member holder
150: air inlet and outlet 160: air valve
161: ON / OFF switch 170: Wheel

Claims (5)

Body frame,
A plurality of pneumatic support, which are arranged spaced apart from each other on the upper surface of the body frame, and include a linear piston and a cylinder
Box holder is coupled to the top of the pneumatic support and moves vertically according to the change in the vertical length of the pneumatic support, the box holder is seated fruit box
An elastic member having one end coupled to the box holder to continuously apply a tensile force to move the box holder upward,
Air outlet pipe connected to one side of the cylinder of the pneumatic support,
It is mounted on the other end of the air outlet pipe and includes an air valve that controls ON / OFF air discharge in the pneumatic support,
The upper surface of the body frame is inclined in one direction, characterized in that a plurality of rollers are arranged on the upper surface of the body frame
Fruit box lifting device.
According to claim 1,
The air outlet pipe is connected in parallel to each cylinder of a plurality of pneumatic support, the air valve is a fruit box lifting device characterized in that it is mounted to the end of the air outlet pipe.
According to claim 1,
When the fruit box is seated on the box holder and the fruit is loaded on the fruit box, when the load occurs, the air valve is opened to discharge the air in the cylinder and the air valve is closed to stop the air discharge in the cylinder, and is seated on the box holder The fruit box lifting and lowering device, characterized in that air is introduced into the cylinder by opening the air valve in the absence of a load transmitted from the fruit box and moving the box holder upward by the restoring force of the elastic member.
delete According to claim 1,
Fruit box lifting and lowering device, characterized in that the bottom of the main frame is equipped with a wheel that can be moved and rotated.

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