KR102677007B1 - Rear door opening and closing structure of cargo box - Google Patents

Abstract

The present invention relates to a structure for opening and closing the rear door of a cargo transport box that operates in a foldable manner by operating a controller and is completely opened to the upper side. The rear door is mounted at the rear of a cargo transport box with a box-shaped loading space. In the structure, the structure of the rear door is composed of a rear panel divided into upper and lower parts, and the upper part of the divided panel is folded so that it can be rotated in the up and down direction by the rear axis, and the panel is connected to a driving device. By receiving the power of the driving device and controlling the rotation of the rear panel, the rear door is automatically opened and closed. The driving device operates by linking the door link to the cylinder and piston structure, or a driving arm is mounted on the driving shaft. By operating in conjunction with each other, the rear door is automatically opened and closed by the user's operation, and the rear door opening structure ensures a stable folding operation, minimizing the operating radius of the rear panel and taking various forms depending on the logistics site. It can be opened to allow safe transportation and loading and unloading of cargo.

Description

Rear door opening and closing structure of cargo box}

The present invention relates to an opening and closing structure of a rear door mounted at the rear of a cargo transport box, and more specifically, to a rear door opening and closing structure of a cargo transport cargo box that operates in a foldable manner by operating a controller and is completely opened to the upper side. It's about.

In general, cargo vehicles equipped with a square box-shaped loading box, such as a truck, have a rear door installed at the rear of the loading box to load and unload cargo. The conventional rear door is installed with a door that opens and closes with double doors, and opens and closes with double doors. A separate locking device is installed at the border, and the user unlocks or engages the locking device to open and close the rear door.

However, with such a conventional double-door type, if the door is only partially opened, it is cumbersome because the door interferes with the loading and unloading of cargo, and there is also a risk of safety accidents occurring as the door swings arbitrarily, and the locking device is not properly locked. There is a high risk that several safety accidents will occur.

In particular, loading and unloading of cargo is performed after the door is fully opened and fixed to both outer walls of the cargo box. In order to completely open the door in a double-door format, the minimum space for the door to be opened must be secured, so the truck Since it is difficult to open the door because it is caught on the wall when you are completely close to the loading and unloading area of the cargo, the driver must first drive the truck close, get out, completely open the rear door, and then get back in and open the rear door. ,It is very inconvenient because the work has to be done after getting close to the unloading area, and since the double-door type door is difficult to completely adhere to the rear, the protruding part causes inconvenience in passing and causes other transportation difficulties. There is a problem to be had.

Recently, in Patent No. 10-2206751 (January 19, 2021), which was designed to solve the problem of the conventional rear door lock, the rear door was formed separately into upper and lower sections and then opened and closed automatically in the up and down directions to prevent it from closing completely while driving. A plan has been proposed to prevent the lock from being unlocked and reopened.

However, even if it is opened and closed upwards and downwards, it still causes inconvenience in passing, and the open state of the door interferes with the loading and unloading of cargo, causing a lot of inconvenience in use.

The present invention is intended to solve the above problems, and the rear door opening structure is formed in a structure that automatically opens and closes by folding upward to minimize loading and unloading of cargo or interference with surrounding objects, and is available in various forms. By enabling transformation and opening, it is designed to respond appropriately to the on-site situation at the logistics site and facilitate loading and unloading of cargo.

The present invention, as a technical idea for achieving the above object, is a structure in which a rear door is mounted at the rear of a cargo transport box where the loading space is in the form of a box, and the structure of the rear door is composed of a rear panel divided into upper and lower parts. , the upper part of the divided panel is configured to be foldable so that it can be rotated up and down by the rear axis, and the panel is linked to a drive device to receive the power of the drive device to control the rotation of the rear panel, automatically rotating the rear panel. The door is opened and closed, and the driving device operates by linking the door link to the cylinder and piston structure, or by installing a driving arm on the drive shaft and operating in conjunction, so as to perform automatic opening and closing of the rear door by the user's operation. , This is to ensure stable folding operation.

According to the rear door opening and closing structure of the cargo transport box of the present invention, the rear door is automatically opened and opened in a folding structure, thereby minimizing space constraints by minimizing the operating radius and during the opening and closing of the cargo box during loading and unloading or during loading. The occurrence of accidents in the process of moving, loading and unloading can be reduced in an open and closed state, and since the loading box can be opened in various forms depending on the conditions of the logistics site, work time can be greatly shortened while minimizing environmental constraints.

Also, since there is no risk of the rear door being opened arbitrarily while driving due to the lock not being fastened, it is possible to maintain the watertight function and prevent safety accidents during cargo transportation due to arbitrary opening.

In addition, when only partially opened, the folded rear door acts as an awning and can be used to block sunlight or prevent rain from entering when loading and unloading cargo. When the rear door is opened, it can be completely folded and opened in a folded state. Since it can be maintained, it is possible to minimize wind resistance when loading and unloading, thereby preventing rollover accidents or breakage or damage to the driving part, reducing the failure rate and greatly improving durability.

1 is an external view showing the rear door structure of the loading box of the present invention.
Figure 2 is an enlarged view showing the detailed structure of the rear door of Figure 1 of the present invention.
Figure 3 is an exterior view of the rear door of Figure 2 in an open state.
Figure 4 is an operating state diagram showing the opening and closing structure of the rear door of the present invention.
Figure 5 is an enlarged view showing the operating structure of the rear structure of Figure 4
Figure 6 is a detailed view showing the operating structure of Figure 5
Figure 7 is an operating state diagram showing the door link operating structure of the present invention
Figure 8 shows an embodiment of the open state of the rear door of the present invention.
Figure 9 is another embodiment of the rear door of the loading box of the present invention.
Figure 10 is a detailed structural diagram of Figure 9
Figure 11 is an operating state diagram showing the opening and closing structure of the rear door of Figure 9
Figure 12 is a state in which the rear door of Figure 11 is fully open.
Figure 13 is a schematic diagram showing the structure of the loading box upper loop lifting device of the present invention
Figure 14 is an operating state diagram of a structure in which the roof is raised by the lifting device of Figure 13

Hereinafter, the present invention will be described in detail with reference to the attached drawings.

As shown in FIG. 1, the rear door opening and closing structure of the cargo transport box of the present invention has a rear door 200 at the rear of the cargo box frame 100 in order to have an open structure to open and close the rear of the cargo box to load and unload cargo. ) is installed, and the rear door has a folding structure so that it can be opened by folding, thereby minimizing peripheral interference during the opening and closing operation and enabling stable opening and closing.

First, the loading box frame 100 constitutes the frame of the loading box and may include a bottom frame 120 made of metal, a vertical frame 140, and an upper frame 160.

The floor frame 120 is formed by forming an edge with a metal beam and welding a beam on the inside, and the upper surface can be formed by covering the upper surface with a metal plate, etc. to form the bottom of the loading box.

The vertical frame 140 can be installed vertically upright at each corner of the floor frame. At this time, since the rear of the loading box is the part where opening and closing is performed, the vertical frame is constructed with a metal beam and a metal plate surrounding it only at the corners. It is desirable to facilitate loading and unloading, and reinforcement can be provided by additionally constructing reinforcing bars in the center, including the corners of the floor frame, on the front side of the loading box.

The upper frame 160 is configured to connect the upper end of the vertical frame 140 so that a roof can be mounted, so that the loading box forms the framework of the loading box frame 100.

As described above, the rear door 200 is mounted at the rear of the loading box frame 100 and is opened and closed toward the rear, and the rear door 200 is divided into two sides and has a rear panel 220 that is foldable. It is possible to provide a door with a folding structure by being mounted in a hinge structure and operated by a driving device.

To describe the structure of the rear door 200 in more detail, as shown in FIGS. 2 to 5, the rear panel 220 is divided into an upper rear panel 222 and a lower rear panel 224, and the upper rear panel A driving device 240 is mounted on 222 and operates by receiving power from the driving device to control the rotation of the upper rear panel 222 to open and close the rear door 200.

At this time, the rear panel 220 is rotated up and down as the top of the upper rear panel 222 is mounted on the loading box frame 100 as the rear axis 230, and the loading box frame 100 and the upper rear A door link 260 is mounted on each panel 222, and the closing and opening angles of the upper rear panel 222 are fixed by the door links connected axially.

In addition, the driving device 240 is driven by the tip of the shaft 244, which reciprocates in the cylinder 242, being axially coupled to the traction shaft 262 to which the door link 260 is axially connected. Accordingly, the rear door is opened and closed by controlling the angle of the door link 260.

At this time, the door link 260 is axially coupled to the support shaft of the loading box frame 100 and the upper rear panel 222, and the other end of the door link 262 is fixed to the traction shaft 262 to form the shaft 244. As the angle between the links widens or narrows according to the reciprocating motion, the angle at which the upper rear panel 222 is rotated up and down widens or narrows, thereby making it possible to close or open the rear of the loading box.

In addition, the rear door 200 receives power from the driving device 240 so that the upper rear panel 222 rotates, and the lower rear panel 224, which is folded with the upper rear panel 222, rotates. The rear door 200 is opened while being towed, and conversely, when the upper rear panel 222 is rotated downward, the lower rear panel 224 lowers under its own weight and blocks the open rear of the cargo box.

Therefore, by connecting the driving device 240 to a hydraulic or pneumatic line, the rear door 200 can be opened and closed very easily by the user's switch operation or remote controller operation. The rear door is automatically opened while the operating radius is limited by the folding structure. can be opened by minimizing the rear door, minimizing interference from the rear door during the loading and unloading process, and safely maintaining the rear door open and closed.

Also, when the rear door 200 is stopped while opening by the user's manipulation, the rear door 200 remains partially opened and horizontally folded, and has a horizontally folded structure. The rear door acts as an awning and can also be used to block sunlight or prevent rain from entering when loading and unloading cargo.

In addition, in order to minimize the load towed when the rear door 200 is opened and closed, it is very important that the lower rear panel 224 hangs and moves smoothly in response to the direction in which the upper rear panel 222 is rotated. An auxiliary link 270 may be further provided to change the direction of the traction force applied by the upper rear panel 222 when the rear panel 224 is hung and moved.

Therefore, when the rear door 200 is opened and closed, the lower rear panel 224 moves flexibly in up and down tilt in response to the pulling force generated by the upper rear panel 222, thereby achieving lifting and lowering operation. Traction load is minimized and stable operation is achieved.

Meanwhile, Figures 9 and 10 are diagrams showing the mounting structure according to another embodiment of the rear door 200 opening and closing structure of the present invention, Figure 11 shows the operating structure, and Figure 12 shows the rear door 200 fully opened. This is a drawing showing the condition.

Referring to the drawing, the rear door 200 of the present invention can be configured to be folded by being divided into upper and lower parts, but can be configured to maintain a folded state by being completely overlapped on the upper part of the loading box when the rear door is fully open. there is.

To describe the structure of this rear door 200 according to another embodiment in more detail, the rear door 200 mounted at the rear of the cargo box is equipped with a rear panel 220 that protects the rear of the cargo box from the external environment, and the rear door 200 is equipped with a rear panel 220 that protects the rear of the cargo box from the external environment. The panel 220 is divided into an upper and lower rear panel 222 and a lower rear panel 224, and the upper and lower rear panels 222 and 224 are foldable.

And a driving device 240 that receives power from the electrical unit and provides rotational force while the upper rear panel 222 is fixed and rotatably mounted on one end of the upper frame 160 provided on the upper side of the loading box frame 100. It operates by.

The driving device 240 is equipped with a driving arm 280, and the driving arm 280 is mounted on the upper rear panel 222, so that the driving arm 280 rotates in the up and down directions, thereby opening the wing door. Opening and closing takes place.

The rear panel 220 is mounted to be hinged by a rear axle 230 mounted on the upper frame 160 of the loading box frame 100, and the drive device 240 is equipped with a drive arm ( In a state in which 280) is rotatably mounted, the other end of the driving arm 280 is axially coupled to the rear panel 220 at a predetermined position by the second rear axle 285, thereby forming the rear panel 220 and the driving arm 280. Rotation is performed on these different axes, and the power generated from the driving arm 280 is transmitted to the rear panel 220 through the second rear axle 285, so that the rear panel 220 is based on the rear axle 230. The wing door is opened and closed by rotating, and the rear shaft 230 is located relatively above the drive shaft 246, so that the drive device 240 is mounted on the upper frame 160 and the rear panel 220 is It is possible to provide a foldable structure that completely overlaps the upper part of the loading box.

At this time, the driving device 240 is mounted on the beam that constitutes the top of the door frame among the upper frames 160, and the driving device 240 has a cylinder structure that converts reciprocating motion into rotational motion. What can be achieved is that the driving device 240 allows the shaft to slide back and forth in the longitudinal direction of the loading box by hydraulic or pneumatic pressure, and configures multiple cylinders interlocked with the shaft to form a shaft and a cylinder or multiple components. By making the cylinders relatively fixed and interlocked in a spiral structure, a structure can be applied in which the cylinders rotate forward and backward through the reciprocating motion of the shaft, converting linear motion into rotational motion and generating high torque rotational force.

And as the drive arm 280 is rotated by the drive shaft 246, the rear panel is linked to open and close, and the rear axis 230, the drive shaft 246, and the second rear axis 285 are linked to operate. As this is achieved, stable opening and closing operation of the rear door can be achieved.

In addition, a guide 290 may be installed at the bottom of the lower rear panel 224 to prevent twisting and movement of the rear panel when opening and closing the wing door and to guide stable opening and closing operations. The guide 290 is located at the bottom of the lower rear panel. With one end fixed to (224), the other end is supported by the guide shaft 142 on the vertical frame 140 of the loading frame 100, and when the upper rear panel 222 rotates up and down, the lower rear panel ( As 224) is folded with the upper rear panel 222, it can prevent shaking or movement and induce movement only in the vertical direction to ensure stable opening and closing operation of the lower rear panel 224.

At this time, the rear door 200 is configured to fold the rear door on top of the wing body when the cargo box is structured with a wing body or an open roof, so that the open state of the cargo box can be modified and used in various ways, as well as the storage box's open state. It minimizes the operating radius for opening and closing and prevents interference when loading and unloading cargo.

That is, for example, in the case of a wing body cargo box with a structure that is open on both sides, the wings on both sides can be folded and opened at the top of the cargo box, or if the roof of the cargo box is manufactured in a structure that can be opened, the wings can be folded and opened. In order to allow the rear doors 200 to be folded on top of the cargo compartment when the roof door 300 is closed or closed, the height of the axis on which each door rotates can be varied to have a sequential stacking structure.

Meanwhile, when the loading box of the present invention is manufactured with a wing body, the loading box can be equipped with a lifting device 300 for adjusting the height of the roof, and as shown in FIGS. 13 and 14, the upper frame 160 is If the lifting and lowering operation is performed while mounted on the vertical frame 140, the height of the loading box can be freely adjusted when loading and unloading.

That is, the upper frame 160 is provided with a lifting bar 162 that is mounted vertically downward to be inserted into the vertical frame 140, and the lifting bar 162 is connected to the traction device 340 that constitutes the lifting device 300. They are linked to move up and down, allowing the roof height of the cargo box to be adjusted.

The lifting device 300 is built into the vertical frame 140 or is equipped with a traction device 340 on one side of the vertical frame 140 so that the shaft reciprocates in the upward and downward directions to lift the upper frame 160 upward or downward. As a result, the height can be adjusted in various ways depending on the work site or work conditions to facilitate loading and unloading of cargo.

At this time, the towing device 340 is preferably provided on both sides of the front and rear of the loading box so that the upper frame 160 can be lifted up and down while maintaining a horizontal state with the floor of the loading box. At the rear, by placing the lifting bar adjacent to the vertical frame 140 on both sides, sufficient open space for loading and unloading can be secured.

In addition, in the front of the loading box, the lifting bar 162 is inserted through the vertical frames 140 on both sides to slide up and down, and an auxiliary vertical frame and auxiliary lifting bar are additionally provided in the center, so that there are multiple lifting bars. By configuring the upper frame 160, it is possible to achieve a more stable vertical lifting operation up and down.

100: Loading box frame
120: Floor frame
140: Vertical frame 142: Rail groove
160: upper frame 162: lifting bar
200: Rear door
220: Rear panel 222: Upper rear panel 224: Lower rear panel
230: Rear axis
240: driving device 242: cylinder 244: shaft
246: Drive shaft
260: door link 262: traction shaft
270: Auxiliary link
280: Drive arm
290: Guide
300: Elevating device
340: Traction device

Claims (6)

It is equipped with a loading box for cargo transportation in which the loading space is box-shaped and has a structure that includes a bottom, side walls, and a roof.
The loading box is structured to be in the form of a box, and a roof can be installed by connecting the floor frame 120, the vertical frame 140 installed vertically at each corner of the floor frame, and the top of the vertical frame. A loading box frame 100 is provided to include an upper frame 160,
In the cargo transport loading box, a rear door 200 is mounted at the rear of the loading box frame 100 to open and close the loading box, allowing loading and unloading of cargo,
The rear door 200 has a rear panel 220 divided into an upper rear panel 222 and a lower rear panel 224, and a driving device 240 is mounted on the upper rear panel 222 to power the driving device. It is transmitted and operated to control the rotation of the upper rear panel 222 to open and close the rear door 200,
The loading box is provided with a lifting device 300, and the lifting device 300 is mounted on the upper frame 160 in a downwardly upright state with a lifting bar 162 inserted into the vertical frame 140, The lifting bar 162 is linked to the traction device 340 and moves up and down, so that the height of the roof can be adjusted by lifting the upper frame 160 upward or lowering it downward. Rear door opening and closing structure. The method of claim 1, wherein the rear panel (220) is rotated up and down by mounting the top of the upper rear panel (222) on the loading box frame (100) as the rear axle (230),
A door link 260 is mounted on each of the loading box frame 100 and the upper rear panel 222, and the closing and opening angles of the upper rear panel 222 are fixed by the door link connected on the axis,
In the driving device 240, the tip of the shaft 244, which reciprocates in the cylinder 242, is axially coupled to the traction shaft 262 to which the door link 260 is axially connected, and the driving device 240 is driven. A rear door opening and closing structure of a cargo transport cargo box, characterized in that the rear door is opened and closed by controlling the angle of the door link 260. The method of claim 2, wherein the rear door (200) is provided with an auxiliary link (270) to change the direction of the traction force applied during towing and is connected to the loading box frame (100) to minimize the towing load. Opening and closing structure of the rear door of a cargo transport box. It is equipped with a loading box for cargo transportation in which the loading space is box-shaped and has a structure that includes a bottom, side walls, and a roof.
The loading box is structured to be in the form of a box, and a roof can be installed by connecting the floor frame 120, the vertical frame 140 installed vertically at each corner of the floor frame, and the top of the vertical frame. A loading box frame 100 is provided to include an upper frame 160,
In the cargo transport loading box, a rear door 200 is mounted at the rear of the loading box frame 100 to open and close the loading box, allowing loading and unloading of cargo,
The rear door 200 has a rear panel 220 divided into an upper and lower rear panel 222 and a lower rear panel 224, and the upper and lower rear panels 222 and 224 are folded with a hinge structure, A driving device 240 is installed that receives power from the electrical unit and provides rotational force, and a driving arm 280 mounted on the driving device is mounted on the upper rear panel 222 to perform a turning operation in the up and down directions. The rear door is opened and closed,
The loading box is provided with a lifting device 300, and the lifting device 300 is mounted on the upper frame 160 in a downwardly upright state with a lifting bar 162 inserted into the vertical frame 140. The lifting bar 162 is linked to the traction device 340 and is operated to raise and lower, so that the height of the roof can be adjusted by lifting the upper frame 16 upward or lowering it downward. Rear door opening and closing structure. The method of claim 4, wherein the rear panel 220 is hingedly operated by a rear shaft 230 mounted on the upper frame 160 of the loading box frame 100, and the drive device 240 includes a drive shaft 246. ) in a state in which the driving arm 280 is rotatably mounted, the other end of the driving arm 280 is axially coupled to the rear panel 220 by the second rear axle 285 at a predetermined position on the rear panel 220. and the driving arm 280 rotate on different axes, and the power generated from the driving arm 280 is transmitted to the rear panel 220 through the second rear axle 285, so that the rear panel 220 is rear The rear door is opened and closed by rotating around the axis 230, and the rear axis 230 is located relatively above the drive shaft 246, so the drive device 240 is mounted on the upper frame 160. A rear door opening and closing structure of a cargo transport cargo box, characterized in that the rear panel 220 can provide a foldable structure that completely overlaps the upper part of the cargo transport box. The method of claim 5, wherein the rear panel 220 is supported on a vertical frame 140 at the bottom of the lower rear panel 224 to prevent twisting and movement of the rear panel when opening and closing the rear door and to guide stable opening and closing operations. A rear door opening and closing structure of a cargo transport cargo box, characterized in that the guide 290 is axially coupled.

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