Functional trailer

Abstract

Disclosed is a functional trailer. The functional trailer according to the present invention comprises: a loading platform that forms a place on which a load is loaded and that includes a horizontal loading part, disposed in a horizontal direction, and an inclined loading part, disposed at an incline and connected to the horizontal loading part at an end region of the horizontal loading part; a vehicle connection unit which is detachably connected to a vehicle and coupled to the horizontal loading part of the loading platform from the opposite side as the inclined loading part; and a plurality of loading platform-moving and up / down driving units which are provided in both side regions of the horizontal loading part of the loading platform and which move the loading platform and drive the loading platform up / down when a load is being loaded onto or unloaded from the loading platform.

Description

Functional trailer

[0001] An embodiment according to the concept of the present invention relates to a functional trailer, and more particularly, to a functional trailer having a simple yet efficient structure that can easily perform loading work on a load, and can safely load and transport a load that rolls like a motorcycle, unlike in the past.

[0002] A trailer is a trailer attached to the rear of a truck or tractor-trailer. It's also called a "churera." While the term "trailer" often refers to both a tractor-trailer and a trailer, strictly speaking, only the trailer attached to the rear is considered a trailer.

[0003] Trailers are classified into motorcycle and bicycle trailers, boat trailers, trunk trailers, and camping trailers (caravans) based on their function and purpose, and into semi-trailers and full-trailers based on their towing method.

[0004] Meanwhile, among the various types of trailers, some have a sloped top for easy loading. This makes it easier to load rollable loads, such as cars, motorcycles, and bicycles.

[0005] However, these conventional trailers often feature an entirely sloped top surface, making them difficult to transport while securing motorcycles and other objects. This is because motorcycles tend to roll away without being tied down with ropes or straps, making them difficult to safely load and transport. Therefore, the need for efficient structural improvements is becoming increasingly apparent.

[0006] The technical task of the present invention is to provide a functional trailer that can easily perform the loading operation of a load with a simple but efficient structure, and can safely load and transport a load that rolls like a motorcycle, unlike conventional trailers.

[0007] The above object is achieved by a functional trailer characterized by including a loading platform having a horizontal loading portion that forms a place where a load is loaded and is arranged horizontally, and an inclined loading portion that is connected to the horizontal loading portion at an end region of the horizontal loading portion and is arranged inclinedly; a vehicle connecting unit that is connected to the horizontal loading portion of the loading platform at a position opposite the inclined loading portion and is detachably connected to a vehicle; and a plurality of loading platform moving and up / down driving units that are respectively provided in areas of both sides of the horizontal loading portion of the loading platform and drive the loading platform up / down when moving the loading platform and loading or unloading a load onto the loading platform.

[0008] The above loading platform moving combined up / down drive units are arranged in pairs facing each other on both sides of the horizontal loading section of the loading platform, and the plurality of loading platform moving combined up / down drive units have the same structure and can be driven synchronously.

[0009] The method may further include a signal input unit for inputting a synchronous driving signal for synchronous driving of the plurality of load-moving, dual-purpose up / down driving units; and a controller for controlling the plurality of load-moving, dual-purpose up / down driving units to drive synchronously based on an input value of the signal input unit.

[0010] The above-described loading platform moving and up / down driving unit may include a moving wheel that rotates without power and moves the loading platform; a fixed bracket that is fixedly connected to one side of the loading platform and is arranged as a pair and spaced apart from each other by the thickness of the moving wheel; a wheel bracket connector that is connected to the fixed bracket at one end and connected to the center area of ​​the moving wheel at the other end; a rotating shaft that is coupled to the fixed bracket and the wheel bracket connector and forms a rotating axis of the wheel bracket connector; a connector boss that is connected to the wheel bracket connector and forms one body with the wheel bracket connector; and an actuator that is connected at an end to be relatively rotatable to the connector boss and drives the moving wheel up / down while moving the connector boss forward or backward with the rotating shaft as an axis.

[0011] The above-mentioned load-carrying, moving, up / down drive unit may further include a wheel cover that partially surrounds and protects an upper area of ​​the moving wheel; a cover housing that protects the actuator; a base plate that supports the cover housing and is fixed to a lower portion of the load-carrying platform, and to which the fixing bracket is coupled at one side; and a housing plate that is connected to the base plate at one side of the cover housing and has an actuator passageway formed therein through which the actuator passes.

[0012] The above-mentioned load-bearing moving up / down drive unit is disposed between the housing plate and the wheel bracket connector, and may further include an elastic support module that elastically supports the moving wheel when the moving wheel is driven up / down.

[0013] The vehicle connection unit may include a vehicle connection portion connected to one side of the vehicle; a loading platform connection portion having an insertion portion to be connected while being partially inserted into the loading platform; a rotating head portion forming a single body with the vehicle connection portion and rotating the vehicle connection portion; a lower connection link having both ends rotatably coupled to the loading platform connection portion and the rotating head portion in a lower region of the loading platform connection portion and the rotating head portion; an upper connection link having both ends rotatably coupled to the loading platform connection portion and the rotating head portion in an upper region of the loading platform connection portion and the rotating head portion; and a link driving force generator rotatably coupled to the loading platform connection portion and the rotating head portion and generating a driving force for driving the lower connection link and the upper connection link.

[0014] The vehicle connection unit may further include a guide wheel that guides the position of the vehicle connection portion; a wheel support that rotatably supports the guide wheel and is connected to the loading platform; and a wheel direction adjustment handle provided on the wheel support that adjusts the direction of the guide wheel.

[0015] The horizontal loading section includes a loading frame welded in a grid shape and having a loading platform moving up / down drive unit coupled to one side; and a plurality of loading plates arranged in empty spaces of the loading frame, and a license plate module can be detachably coupled to the inclined loading section.

[0016] The above loading platform is connected to the loading frame and the vehicle connection unit, and may further include a plurality of reinforcing frames that reinforce the vehicle connection unit.

[0017] According to the present invention, not only can the loading work for a load be easily performed with a simple but efficient structure, but even if the load is a rolling load such as a motorcycle, it can be loaded and transported safely, unlike in the past.

[0018] FIG. 1 is a perspective view of a functional trailer according to one embodiment of the present invention.

[0019] Figures 2 and 3 are drawings showing the functional trailer of Figure 1 from different angles.

[0020] Figure 4 is a partial exploded view of Figure 1.

[0021] Figure 5 is a drawing of Figure 4 with the box and loading plate removed.

[0022] Figure 6 is an enlarged perspective view of the vehicle connection unit illustrated in Figure 1.

[0023] Figures 7 to 10 are drawings showing the vehicle connection unit of Figure 6 from different angles.

[0024] Fig. 11 is an enlarged perspective view of the loader moving up / down drive unit illustrated in Fig. 1.

[0025] Figures 12 to 15 are drawings showing the loader moving up / down drive unit of Figure 11 from different angles with the cover housing removed from Figure 11.

[0026] Fig. 16 is a plan view of Fig. 1.

[0027] Figure 17 is a side structural drawing of the loading platform.

[0028] Fig. 18 is a diagram showing the operation of the functional trailer of Fig. 1, in which the loading platform moves up.

[0029] Fig. 19 is a diagram showing the operation of the functional trailer of Fig. 1, in which the loading platform is in a down operation.

[0030] Fig. 20 is a control block diagram for the functional trailer of Fig. 1.

[0031] Figure 21 is a structural diagram of an up / down drive unit for moving a loading platform in a functional trailer according to another embodiment of the present invention.

[0032] Any specific structural or functional descriptions of embodiments according to the concept of the present invention disclosed in this specification are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms and are not limited to the embodiments described in this specification.

[0033] Embodiments according to the concept of the present invention may have various modifications and take various forms, and thus, embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit embodiments according to the concept of the present invention to specific disclosed forms, but rather includes all modifications, equivalents, or alternatives falling within the spirit and technical scope of the present invention.

[0034] While terms such as "first" or "second" may be used to describe various components, these components should not be limited by these terms. These terms are only intended to distinguish one component from another. For example, a first component may be referred to as a "second component," and similarly, a second component may be referred to as a "first component," without departing from the scope of the present invention.

[0035] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may also be other components in between. Conversely, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions that describe the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to," should be interpreted similarly.

[0036] The terminology used herein is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in this specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0037] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be construed in an idealized or overly formal sense unless explicitly defined herein.

[0038] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached to this specification.

[0039] FIG. 1 is a perspective view of a functional trailer according to an embodiment of the present invention, FIGS. 2 to 3 are views showing the functional trailer of FIG. 1 from different angles, FIG. 4 is a partial exploded view of FIG. 1, FIG. 5 is a view showing the box and the loading plate removed from FIG. 4, FIG. 6 is an enlarged perspective view of the vehicle connection unit shown in FIG. 1, FIGS. 7 to 10 are views showing the vehicle connection unit of FIG. 6 from different angles, FIG. 11 is an enlarged perspective view of the load bed moving up / down drive unit shown in FIG. 1, FIGS. 12 to 15 are views showing the load bed moving up / down drive unit of FIG. 11 from different angles with the cover housing removed from FIG. 11, FIG. 16 is a plan view of FIG. 1, FIG. 17 is a side structural view of the load bed, FIG. 18 is an operation diagram of the functional trailer of FIG. 1, in which the load bed moves up, and FIG. 19 is a view of the As a diagram of the operation of the functional trailer of Fig. 1, the drawing of the loading platform moving down is shown. Fig. 20 is a control block diagram of the functional trailer of Fig. 1.

[0040] Referring to these drawings, the functional trailer (100) according to the present embodiment has a simple but efficient structure that allows for easy loading of loads, and even loads that roll like motorcycles can be loaded and transported safely, unlike in the past. The functional trailer (100) according to the present embodiment that can provide such effects includes a loading platform (110), a vehicle connection unit (140), and a loading platform moving up / down drive unit (150).

[0041] The loading platform (110) forms a space where loads are loaded, as illustrated in FIGS. 1 to 5 and FIGS. 16 to 19. This loading platform (110) includes a horizontal loading section (120) and an inclined loading section (130) in the present embodiment. The horizontal loading section (120) and the inclined loading section (130) are manufactured separately and then connected to form a single body. Therefore, they move together.

[0042] The horizontal loading section (120) forms a place where loads are loaded and is arranged horizontally. This horizontal loading section (120) has a much wider area than the inclined loading section (130). That is, the majority of loads loaded through the inclined loading section (130) are placed on the horizontal loading section (120). Therefore, the horizontal loading section (120) must have excellent rigidity and be arranged horizontally.

[0043] The horizontal loading unit (120) includes a loading frame (121) that is welded in a grid shape, and a plurality of loading plates (122) that are placed in the empty spaces of the loading frame (121). The loading frame (121) is a hollow rectangular cross-section steel structure with very high strength. An up / down driving unit (150) for moving the loading platform is connected to one side of the loading frame (121). The loading plate (122) is a relatively thin steel plate with a certain rigidity.

[0044] The inclined loading section (130) is a section that is connected to the end area of ​​the horizontal loading section (120) and is arranged at an angle. Loads that roll, such as motorcycles, can be loaded onto the horizontal loading section (120) by riding the inclined loading section (130) arranged at an angle, making the loading process very easy. In particular, unlike conventional loads, the inclined loading section (130) is only a short section, so it can provide an excellent effect in safely loading and transporting loads.

[0045] A plurality of boxes (101) may be arranged on one side of the horizontal loading unit (120). The boxes (101) may have an openable lid and may contain various parts, including tools. Of course, the box (101) is not necessarily required, and thus, a type without the box (101) may also fall within the scope of the present invention. A license plate module (131) may be detachably coupled to the inclined loading unit (130).

[0046] The vehicle connection unit (140) is a part that is detachably connected to a vehicle. The vehicle connection unit (140) is connected to the horizontal loading section (120) of the loading platform (110) at a position opposite the inclined loading section (130).

[0047] To firmly connect the vehicle connection unit (140), a plurality of reinforcing frames (135) are further used. The reinforcing frames (135) are connected to the loading frame (121) and the vehicle connection unit (140), and serve to reinforce the vehicle connection unit (140). Therefore, the vehicle connection unit (140) does not easily fall off or become detached.

[0048] The vehicle connection unit (140) includes a vehicle connection part (141) connected to one side of the vehicle, and a loading platform connection part (142) connected to a loading platform (110), and a rotating head part (143), a lower connection link (144), an upper connection link (145), and a link driving force generator (146) are arranged in positions between them.

[0049] The vehicle connecting portion (141) has a hollow internal structure. This vehicle connecting portion (141) can be connected in a form that is inserted into a connecting portion of a vehicle, such as a truck.

[0050] The loading platform connecting portion (142) includes an insertion portion (142a) that is connected while being partially inserted into the loading platform (110). After the insertion portion (142a) of the loading platform connecting portion (142) is partially inserted into the loading platform (110), the loading platform connecting portion (142) is completely connected to the loading platform (110) through welding, bolting, or the like.

[0051] The rotating head (143) is a structure that forms one body with the vehicle connecting part (141) and rotates the vehicle connecting part (141). It is a bracket type with a cross-sectional T-shaped structure.

[0052] The lower connecting link (144) is connected at both ends in the lower region of the loading platform connecting portion (142) and the rotating head portion (143) so as to be relatively rotatably connected to the loading platform connecting portion (142) and the rotating head portion (143). In addition, the upper connecting link (145) is connected at both ends in the upper region of the loading platform connecting portion (142) and the rotating head portion (143) so as to be relatively rotatably connected to the loading platform connecting portion (142) and the rotating head portion (143). Although the lower connecting link (144) and the upper connecting link (145) are different in position and shape, they have the same function in that they rotate the rotating head portion (143) while being operated by the link driving force generator (146).

[0053] The link driving force generator (146) is connected to the loading platform connecting portion (142) and the rotary head portion (143) so as to be relatively rotatable, and is a means for generating a driving force for driving the lower connecting link (144) and the upper connecting link (145). The link driving force generator (146) may be, for example, a cylinder device. When the link driving force generator (146) operates, the lower connecting link (144) and the upper connecting link (145) are linked and consequently rotate the rotary head portion (143), and as a result, the vehicle connecting portion (141) can be positioned to be connected to the vehicle while rotating.

[0054] This link driving force generator (146) is for the rotational motion of the vehicle connecting portion (141). To align the horizontal position of the vehicle connecting portion (141), the vehicle connecting portion (141) is forced to move horizontally through the guide wheel (147). The guide wheel (147) is a means for guiding the position of the vehicle connecting portion (141). The guide wheel (147) is a non-powered wheel.

[0055] The guide wheel (147) is rotatably supported by a wheel support (148) connected to a loading platform (110). In addition, a wheel direction adjustment handle (149) for adjusting the direction of the guide wheel (147) is provided on the wheel support (148).

[0056] Accordingly, by turning the wheel direction adjustment handle (149) to align the direction of the guide wheel (147), and then forcibly pushing or pulling the vehicle connection unit (140), the vehicle connection unit (140) can move horizontally in the direction of the guide wheel (147). Therefore, this operation can easily align the horizontal position of the vehicle connection part (141).

[0057] The load platform moving and up / down driving unit (150) is provided on each side of the horizontal loading section (120) of the load platform (110), and functions to move the load platform (110) and drive the load platform (110) up / down when loading or unloading a load onto or from the load platform (110). In order to ensure stable movement of the load platform (110), and also to ensure stable up / down driving of the load platform (110) as shown in FIGS. 18 and 19, the load platform moving and up / down driving unit (150) is applied in multiple units.

[0058] At this time, the load platform moving up / down drive units (150) are arranged in pairs facing each other on both sides of the horizontal loading section (120) of the load platform (110). A plurality of load platform moving up / down drive units (150) have the same structure and are driven synchronously.

[0059] This loader moving and up / down driving unit (150) includes a moving wheel (151, wheel), and the following structures and components are mounted at each position for up / down driving of the moving wheel (151).

[0060] The moving wheel (151) is a means for stable movement of the loading platform (110). The moving wheel (151) is a non-powered rotating wheel that rotates without power. For safety and to prevent contamination of the moving wheel (151), a wheel cover (157) is placed on the upper area of ​​the moving wheel (151). The wheel cover (157) partially surrounds and protects the upper area of ​​the moving wheel (151).

[0061] A fixed bracket (152) is provided adjacent to the moving wheel (151). The fixed bracket (152) is fixedly connected to one side of the loading platform (110). The fixed brackets (152) are spaced apart from each other by the thickness of the moving wheel (151) and are arranged in pairs.

[0062] A wheel bracket connector (153) is provided to connect the moving wheel (151) and the fixed bracket (152). The wheel bracket connector (153) is a structure in which one side is connected to the fixed bracket (152) and the other side is connected to the center area of ​​the moving wheel (151).

[0063] The fixed bracket (152) and the wheel bracket connector (153) are provided with a rotating shaft (154) that forms the rotational axis of the wheel bracket connector (153). In addition, the wheel bracket connector (153) is provided with a connector boss (155) that forms one body with the wheel bracket connector (153).

[0064] Meanwhile, an actuator (156) is applied to a load-moving, dual-purpose up / down driving unit (150) for driving up / down the moving wheel (151). The actuator (156) has an end connected to a connector boss (155) so as to be able to rotate relative to the connector boss, and provides power to drive the moving wheel (151) up / down while moving the connector boss (155) forward or backward with the rotating shaft (154) as its axis.

[0065] This actuator (156) can be applied as a cylinder device and can be protected by a cover housing (158). Therefore, the actuator (156) is not visible from the outside during normal operation.

[0066] A base plate (159) is provided at the bottom of the cover housing (158). The base plate (159) is a structure that supports the cover housing (158) and is fixed to the bottom of the loading platform (110). A fixing bracket (152) is attached to one side of the base plate (159).

[0067] A housing plate (161) is provided on one side, i.e., the inner side, of the cover housing (158). The housing plate (161) is a plate-shaped structure connected to the base plate (159) on one side of the cover housing (158). An actuator passage (161a) through which an actuator (156) passes is formed in the housing plate (161).

[0068] And, when the moving wheel (151) is driven up / down by the action of the actuator (156), an elastic support module (163) is further applied to the loading platform moving up / down driving unit (150) to elastically support the moving wheel (151).

[0069] The elastic support module (163) is placed between the housing plate (161) and the wheel bracket connector (153), and serves to elastically support the moving wheel (151) when the moving wheel (151) is driven up / down. As in FIG. 18, when the moving wheel (151) is driven up, the elastic support module (163) expands, and as in FIG. 19, when the moving wheel (151) is driven down, the elastic support module (163) contracts.

[0070] Meanwhile, the functional trailer (100) according to the present embodiment is equipped with a signal input unit (195) and a controller (190) for controlling the equipment.

[0071] The signal input unit (195) is a means for inputting a synchronous driving signal for synchronous driving of multiple load-carrying up / down drive units (150). It can be applied in the form of a button on either side of the load-carrying unit (110). Of course, the signal input unit (195) may be of the remote control type or may be directly controlled from the vehicle's driver's panel.

[0072] The controller (190) controls a plurality of load-moving up / down drive units (150) to operate synchronously based on the input value of the signal input unit (195).

[0073] For example, when a signal is transmitted to move the loading platform (110) downward to load a load, the actuators (156) of the loading platform moving / up / down driving units (150) operate in the other direction under the control of the controller (190), so that the loading platform (110) can move downward as shown in FIG. 19. At this time, since the loading platform (110) is almost in contact with the floor, various loads such as a motorcycle can be easily loaded by using the inclined loading part (130) and horizontal loading part (120) of the loading platform (110).

[0074] Conversely, when a signal is transmitted to move the loading platform (110) upwards to move the load after loading, the actuators (156) of the loading platform movement up / down driving units (150) operate in one direction under the control of the controller (190), thereby allowing the loading platform (110) to move upwards as shown in FIG. 18.

[0075] A controller (190) performing this role may include a central processing unit (191, CPU), a memory (192, MEMORY), and a support circuit (193, SUPPORT CIRCUIT).

[0076] The central processing unit (191) may be one of various computer processors that can be applied industrially to control a plurality of load-moving up / down driving units (150) to operate synchronously based on the input value of the signal input unit (195) in this embodiment.

[0077] The memory (192, MEMORY) is connected to the central processing unit (191). The memory (192) is a computer-readable recording medium that can be installed locally or remotely, and may be at least one readily available memory such as a random access memory (RAM), a ROM, a floppy disk, a hard disk, or any digital storage form.

[0078] The support circuit (193) is coupled with the central processing unit (191) to support typical operations of the processor. This support circuit (193) may include a cache, a power supply, a clock circuit, an input / output circuit, a subsystem, etc.

[0079] In this embodiment, the controller (190) controls a plurality of load-moving up / down driving units (150) to operate synchronously based on the input value of the signal input unit (195), and a series of control processes, etc., may be stored in the memory (192). Typically, a software routine may be stored in the memory (192). The software routine may also be stored or executed by another central processing unit (not shown).

[0080] While the processes of the present invention have been described as being executed by software routines, at least some of the processes of the present invention can also be implemented by hardware. Thus, the processes of the present invention can be implemented as software running on a computer system, as hardware such as an integrated circuit, or as a combination of software and hardware.

[0081] According to this embodiment, which operates based on the structure described above, not only can the loading work for a load be easily performed with a simple but efficient structure, but even if the load is a rolling type such as a motorcycle, it can be loaded and transported safely, unlike in the past.

[0082] Figure 21 is a structural diagram of an up / down drive unit for moving a loading platform in a functional trailer according to another embodiment of the present invention.

[0083] Referring to this drawing, the load-moving, dual-purpose up / down drive unit (250) applied to the present embodiment also adopts a structure that drives the moving wheel (151) up / down. However, instead of the aforementioned cylinder structure, a gear structure is applied. That is, in the case of the present embodiment, a gear-type wheel up / down drive unit (270) is applied instead of the actuator (156). When the gear-type wheel up / down drive unit (270) is applied, it is possible to provide a strong force for the up / down drive of the moving wheel (151) and also to precisely control the up / down drive position.

[0084] This gear-type wheel up / down drive unit (270) includes a boss drive unit (271) that is connected to a connector boss (155) and pushes or pulls the connector boss (155), a rack gear (272) that is connected to the boss drive unit (271), a pinion gear (273) that meshes with the rack gear (272), a motor (274) that generates power for rotating the pinion gear (273), and a motion transmission unit (275) that transmits the driving force of the motor (274) to the rotational motion of the pinion gear (273). In this embodiment, the motion transmission unit (275) includes a drive pulley (275a) that is axially coupled to the motor (274), a driven pulley (275b) that is axially coupled to the pinion gear (273), and a belt (275c) that connects the drive pulley (275a) and the driven pulley (275b).

[0085] Accordingly, when the motor (274) operates in one direction, its driving force is transmitted to the driving pulley (275a), the belt (275c), and the driven pulley (275b), thereby rotating the pinion gear (273), and as a result of this action, the rack gear (272) moves linearly and pressurizes the boss drive body (271). Then, as the wheel bracket connector (153) rotates, the moving wheel (151) can move downward as shown in FIG. 18.

[0086] Conversely, when the motor (274) operates in the other direction, its driving force is transmitted to the driving pulley (275a), the belt (275c), and the driven pulley (275b), thereby rotating the pinion gear (273), and as a result of this action, the rack gear (272) moves linearly and pulls the boss drive body (271). Then, as the wheel bracket connector (153) rotates, the moving wheel (151) can move upward as shown in FIG. 19.

[0087] Even if a gear-type wheel up / down drive unit (270) like this is applied, it is possible to easily perform loading work on a load with a simple but efficient structure, and even if the load is in a rolling form like a motorcycle, it can be loaded and transported safely, unlike in the past.

[0088] As such, the present invention is not limited to the described embodiments, and it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications and variations should be considered to fall within the scope of the claims of the present invention.

Claims

1. A loading platform having a horizontal loading section that forms a place where a load is loaded and is arranged horizontally, and an inclined loading section that is connected to the horizontal loading section at an end area of ​​the horizontal loading section and is arranged inclinedly; A vehicle connection unit that is connected to the horizontal loading part of the loading platform at a position opposite to the inclined loading part and is detachably connected to the vehicle; and A functional trailer characterized by including a plurality of load platform moving and up / down driving units provided on each side area of ​​the horizontal loading section of the load platform, which move the load platform and drive the load platform up / down when loading or unloading a load onto the load platform.

2. In paragraph 1, A functional trailer characterized in that the above-mentioned load platform moving up / down drive units are arranged in pairs facing each other on both sides of the horizontal loading section of the load platform, and the plurality of load platform moving up / down drive units have the same structure and are driven synchronously.

3. In paragraph 2, A signal input unit for inputting a synchronous drive signal for synchronous drive of the above-mentioned multiple load-bearing moving up / down drive units; and A functional trailer further comprising a controller that controls the plurality of load platform moving up / down drive units to drive synchronously based on input values ​​of the signal input unit.

4. In paragraph 1, The above loading platform moving up / down drive unit is, A moving wheel that rotates without power and moves the loading platform; Fixed brackets which are fixedly connected to one side of the above loading platform and arranged in a pair and spaced apart from each other by the thickness of the above moving wheel; A wheel bracket connector having one end connected to the fixed bracket and the other end connected to the center area of ​​the movable wheel; A rotating shaft coupled to the above fixed bracket and the above wheel bracket connector, the rotating shaft forming the rotational axis of the above wheel bracket connector; A connector boss connected to the wheel bracket connector and forming one body with the wheel bracket connector; and A functional trailer characterized in that the end portion is rotatably connected to the connector boss, and includes an actuator that drives the moving wheel up / down while moving the connector boss forward or backward with the rotating shaft as its axis.

5. In paragraph 1, The above loading platform moving up / down drive unit is, A wheel cover partially surrounding and protecting the upper area of ​​the above moving wheel; A cover housing protecting the above actuator; A base plate that supports the cover housing and is fixed to the lower part of the loading platform, and to which the fixing bracket is coupled on one side; A functional trailer characterized in that it further includes a housing plate connected to the base plate on one side of the cover housing and having an actuator passage formed therethrough through which the actuator passes.

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