JPH0562082B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a luggage compartment opening/closing device for a van-type freight transport vehicle, which enables easy loading and unloading of luggage.

Conventional technology Conventionally, as an alternative to a covered transport vehicle in which the luggage compartment is fixedly covered with a sheet or the like, a door has been proposed as described in Japanese Utility Model Publication No. 55-50014 and Japanese Utility Model Publication No. 55-50015. Side-opening cars are known that open upward from the sides. In this conventional side-opening vehicle, pillar frames are fixed to the front and rear ends of the loading platform at regular intervals, and a door that covers the side surface of the cargo compartment is pivotally supported in the upper part between the pillar frames. This side-opening vehicle had a larger door opening area than a covered transport vehicle, making it easier to load and unload cargo.

In addition, conventional transport vehicles that attempted to open and close doors using multiple links include the invention described in Japanese Utility Model Application No. 58-61624, the invention described in Japanese Patent Publication No. 43-23729, and the invention described in Japanese Utility Model Application Publication No. 1983-23729. The invention described in Publication No. 68508 is known.

The invention described in Utility Model Application Publication No. 58-61624 is
The door is pivotally supported using multiple links between the walls of the luggage compartment.

In addition, the invention described in Japanese Patent Publication No. 43-23729 is
Although it does not open and close the side door of the cargo compartment, it is a device that uses multiple links to open and close the top door of the cargo compartment. In this conventional invention, the upper door of the cargo compartment is divided into left and right parts, and the upper door is opened and closed on the left and right sides simultaneously using an operating mechanism such as a plurality of links or a worm gear.

In addition, the invention described in Utility Model Application Publication No. 52-68508 is
This device attempts to open and close each side door and top door of a transport vehicle at the same time. This conventional design connects both sides of the column frame of the transport vehicle and both sides of the top door using a rotating link whose intermediate portion is bendable, and a flexible link between the intermediate axes of the left and right rotating links. Connecting possible hydraulic cylinders. When opening the door, the hydraulic cylinder is extended and the intermediate shaft of the rotation link is expanded in both directions to push the top door upward and open. Further, when the top door is opened, each side door is pushed sideways via a drive link whose one end is connected to the intermediate shaft, thereby attempting to simultaneously open each side door.

Problems to be Solved by the Invention However, in the side-open vehicles of the invention described in Publication of Utility Model Publication No. 55-50014 and the invention described in Publication of Utility Model Publication No. 55-50015, the upper end position of the upwardly opened door is high;
The door protrudes upward. Therefore, when attempting to open the door in a compound with a low ceiling, the door comes into contact with the ceiling, making it impossible to fully open the door.

In addition, the invention described in Utility Model Application Publication No. 58-61624 is
The shape of the link that operates the door is not bent into an L shape or the like, but is straight. Therefore, if you try to install this conventional method on a gate-shaped column frame instead of on the wall of the cargo compartment, the link cannot fit within the width of the column frame, and it will not fit through the rear opening or side opening of the transport vehicle. The links protruded greatly and obstructed the work of transferring cargo. Further, in this conventional method, when the door is fully open, the lower end of the door protrudes sideways to a large extent, and there is a risk that it may come into contact with another vehicle or the like. Furthermore, this conventional idea utilizes the restoring force of a spring to open and close the door. However, when the spring is used for a long period of time, its restoring force decreases, and there is a risk that the door may not be able to be opened.

In addition, the invention described in Japanese Patent Publication No. 43-23729 is
A plurality of operating mechanisms such as links and worm gears are provided to protrude from the outer surface of the cargo compartment wall. Therefore, since the transport vehicle travels with the operating mechanism protruding, there is a risk that the operating mechanism may come into contact with other objects and be damaged or malfunction.

In addition, the invention described in Utility Model Application Publication No. 52-68508 is
It was not possible to selectively open one of the side doors. Therefore, when carrying out cargo transfer work, the transport vehicle must open each side door at the same time, and it is necessary to leave a large gap between adjacent transport vehicles, which occupies a large amount of parking space for the transport vehicle. This made it extremely uneconomical. Furthermore, when the side doors on both sides of the transport vehicle are opened at the same time during rainy weather, rain tends to enter the cargo compartment, and there is a risk that the cargo may get wet.

Further, in this invention, the hydraulic cylinder located between the intermediate shafts of the rotation link is not connected to an object fixed to the loading platform such as a column frame, but is merely suspended between the intermediate shafts. Therefore, in the hydraulic cylinder, the rod tends to become eccentric from the axis due to its own weight, external force, etc., which can lead to failure.

Furthermore, in this conventional method, the heavy side doors are pivotally supported on both sides of the top door, so it is necessary to reinforce the outer periphery of the top door with a C-shaped channel or the like. This increases the weight of the top door and requires a hydraulic cylinder with a large output, resulting in high costs.

The present invention is an attempt to solve the above-mentioned problems, and when the side cover plate of a van-type cargo carrier is opened, the amount of outward protrusion is reduced to prevent contact with the ceiling, etc. The aim is to create a large opening.

In addition, the transport vehicle does not drive with the operating mechanism of the side cover plate sticking out, which may cause damage to the operating mechanism.
It can prevent breakdowns and enable safe driving.

In addition, when the side cover plate is opened, the operating mechanism of the side cover plate protrudes from inside the column frame, which does not interfere with the transfer operation and enables smooth transfer operation.

Furthermore, by making the side cover plates of the transport vehicle individually openable, the parking space occupied by the transport vehicle can be reduced in size, allowing economical parking.

In addition, when transferring cargo in the rain, one side covering plate is closed while the other side covering plate is opened to protect the cargo in the luggage compartment from rain, etc. .

In addition, the cylinder that operates the side cover plate is not burdened with its own weight, thereby preventing failure and ensuring reliable operation.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention fixes column frames to the ends of the loading platform in the front and back direction at regular intervals, and attaches each side cover plate between the column frames. The tip of an L-shaped driven link is supported separately on each side cover plate, and the base end of this driven link is
The tip of the L-shaped drive link is pivoted to the column frame via a support shaft, and the tip of the L-shaped drive link is pivoted to the side cover plate at a constant distance from the tip of the driven link, and fixed to the base end of this drive link. By rotatably supporting the pinion gear on the column frame at a constant distance from the base end of the driven link, and connecting this pinion gear with a rack gear provided at the tip of the cylinder whose one end is connected to the column frame. , the side cover plates can be opened and closed separately.

In addition, the rack gear provided at the tip of the cylinder has its tip connected to the top cover plate that covers the top surface between the column frames, and pushes the top cover plate upward when moving back and forth to rotate the pinion gear. It's okay to be.

Function Since the present invention is configured as described above, the side surfaces between the column frames of the loading platform are covered with separately provided side surface covering plates, but these side surface covering plates are opened. To do this, first operate a cylinder with one end fixed to the post frame. In this case, the cylinders of each side cover plate are actuated simultaneously in order to open both side cover plates at the same time. Also, in order to open one side cover plate, only one cylinder is actuated.

By operating this cylinder, the rack gear at the tip of the cylinder moves in one direction in the axial direction. The rack gear rotates a pinion gear that is pivotally supported on the column frame.

As the pinion gear rotates, the L-shaped drive link that fixes the pinion gear rotates together with the pinion gear, using the base end as a fulcrum. Then, the side cover plate rotates in the opening direction using the base end of the drive link as a fulcrum.

Furthermore, since the side cover plate is pivotally supported by the tip of the drive link, it attempts to rotate in the direction of gravity using the tip of the drive link as a fulcrum. However, the side cover plate pivotally supports the tip of the driven link at a position spaced apart from the tip of the drive link. Further, the base end of the driven link is pivotally supported on the column frame with a constant distance from the distal end of the drive link.

Therefore, the side cover plate performs the opening movement while simultaneously performing a rotational movement having a radius from the base end to the tip of the drive link and a rotational movement having a radius from the base end to the tip of the driven link.

In this opening movement, since the side cover plate is pivotally supported by the drive link and the driven link, there is no risk of the side cover plate coming into contact with the roof of the cargo compartment, the upper cover plate, etc. Furthermore, the side cover plate in the open state is located parallel to the upper surface of the cargo compartment, making it possible to reduce the amount of outward protrusion of the side cover plate.

For this reason, even if the side cover plate of the transport vehicle is opened in a premises, etc., the protruding height of the side cover plate is low, so there is no risk of the side cover plate coming into contact with the ceiling, etc. The cover plate can be fully opened. Also,
Since the amount of protrusion of the side cover plate toward the side of the transport vehicle is reduced, it is possible to park the vehicle in a relatively compact space.

Furthermore, although the transport vehicle can simultaneously open each side cover plate as described above, it is also possible to open each side cover plate separately. Therefore, even in rainy weather, the transport vehicle can keep one side cover plate closed while the other side cover plate is open, so there is less chance of rain entering the cargo compartment.
Enables protection of luggage. Furthermore, by opening only one side cover plate, the amount of protrusion from the transport vehicle can be further reduced, so the parking space can be made smaller and economical parking becomes possible.

Conversely, in order to close the open side cover plate, the cylinder is actuated to move the rack gear in the opposite direction. in this case,
To close each side cover plate, the cylinders of each side cover plate are actuated simultaneously.

When the rack gear is moved in the opposite direction, the pinion gear connected to the rack gear rotates the L-shaped drive link about its base end in a direction that closes the side cover plate.

Further, this side cover plate pivotally supports the tip of the L-shaped driven link at a constant distance from the tip of the drive link. Therefore, the side cover plate simultaneously rotates with a radius from the base end to the tip of the driving link and a radius from the base end to the tip of the driven link, and maintains a trajectory when the opening is made. It can move in the opposite direction and cover the sides of the column frame.

In addition, since the drive link and driven link that operate the side cover plate are formed into an L-shape,
In the closed state of the side cover plate, the drive link and the driven link do not protrude excessively from the width of the column frame and are located inside the width of the column frame. Therefore,
When transferring cargo, it is possible to carry out smooth transfer work without getting caught.

In addition, the cylinder that operates the side cover plate is fixed at one end to the column frame and remains in an immovable position, so there is no extra burden on it, preventing breakdowns, etc.
Enables reliable operation.

Also, by connecting the rack gear provided at the tip of the cylinder to the pinion gear at the base end of the drive link,
The forward and backward movement of the cylinder is converted into rotational force for the drive link. Therefore, it is possible to smoothly open and close the side cover plate by the rotational force of the drive link, and it is also possible to open and close doors such as the top cover plate by directly utilizing the forward and backward movement of the cylinder.

In addition, the tip of the rack gear provided at the tip of the cylinder is connected to the top cover plate that covers the top surface between the column frames, and the top cover plate is pushed upward and moved when the pinion gear moves forward and backward to rotate. It's okay if it's hot. When formed in this manner, when transferring cargo using a forklift, it is possible to increase the amount of cargo to be loaded compared to a conventional transport vehicle in which the upper cover plate is immovably fixed.

In other words, when transferring cargo using a forklift, if the side cover plate is opened and the top cover plate is positioned higher than the height of the cargo space, the cargo and cargo space can be separated from each other like in a conventional transport vehicle. There is no need to create a floating interval for the forklift to transfer the cargo, and it is possible to stack cargo to the full height of the cargo compartment, making it easier to carry cargo compared to conventional transport vehicles. It becomes possible to load many rooms.

Embodiment A first embodiment of the present invention will be described below with reference to FIGS. are fixed at regular intervals.

The column frame 2 has a gate-like shape with a connecting beam 4 connected to the upper end between the columns 3 erected on both sides. Further, a luggage compartment 5 is located between the pillar frames 2, and the upper half of the side surfaces of this luggage compartment 5 are covered with side covering plates 6 separately provided.
It is covered with.

Each side surface covering plate 6 pivotally supports the tip of an L-shaped driven link 7 at its end in the front-rear direction via a support shaft 8 . In addition, the driven link 7 has a base end
It is pivotally supported on the connecting beam 4 of the column frame 2 via a support shaft 10.

Further, the side cover plate 6 is connected to the L through the connecting shaft 11.
It is pivotally supported at the tip of a letter-shaped drive link 12.
The pivot position of the connecting shaft 11 to this side cover plate 6 is as follows:
When the side cover plate 6 is in the closed state, it is located above the support shaft 8 of the driven link 7 at a constant distance. In this way, the side cover plate 6 is connected to the drive link 12.
When the side covering plate 6 is pivoted by the driven link 7 and the opening movement, there is no risk of the side covering plate 6 coming into contact with the roof of the cargo compartment 5 or the top covering plate 20.

Further, the drive link 12 has a pinion gear 13 fixed to its base end, and this pinion gear 13 is pivotally supported on the connecting beam 4 of the column frame 2 via the main drive shaft 14 . The main drive shaft 14 is located above the support shaft 10 with a certain distance therebetween.

Further, the pinion gear 13 is connected to a rack gear 15. This rack gear 115 is connected to the column frame 2.
It is connected to the tip of a cylinder 16 whose one end is fixed to the cylinder 16, and is capable of moving forward and backward in the left and right directions. Further, since the cylinder 16 is fixed at one end to the column frame 2 and remains in an immovable position, no extra burden such as its own weight is placed on the cylinder 16, and breakdowns are prevented and reliable operation is possible. Furthermore, the state of connection between the rack gear 15 and the pinion gear 13 is such that the tip of the rack gear 15 is in contact with the pinion gear 13 when the side cover plate 6 is closed. Further, when the cylinder 16 is extended, the pinion gear 13 rotates in the direction in which the side cover plate 6 is opened as the rack gear 15 moves in the projecting direction.

Further, each drive link 12 and driven link 7 for opening and closing the side cover plate 6 are as shown in FIG.
Since it has a symmetrical shape, parts can be shared, making manufacturing easier.

Further, the cylinder 16 can be fixed to the connecting beam 4 of the column frame 2 and formed by an air cylinder, an oil cylinder, or the like.

In addition, the column frame 2 is provided with a sliding groove 17 for the support shaft 8 and the connecting shaft 11 on the outer surface side of the support column 3, so that when the side cover plate 6 is closed, the column frame 2 is provided with a sliding groove 17 for the support shaft 8 and the connecting shaft 11. is prevented.

Further, below the side cover plates 6, separately provided gate plates 18 are positioned. Each of the tilting plates 18 is formed with an area that can cover the lower half of the cargo space 5, and the lower end edges are pivotally supported on both sides of the cargo platform 1.
It is possible to open and close between the two pillar frames.

Furthermore, an upper surface covering plate 20 is provided between the pillar frames 2 to cover the upper surface of the luggage compartment 5. This upper surface covering plate 2
0 is fixed between the connecting beams 4 of the column frame 2.

In the structure as described above, in order to load and unload cargo, first, the gate plate 18 covering the lower half of the side surface of the cargo compartment 5 is opened. Next, the side cover plate 6 located above the tilt plate 18
will be opened. The method of opening this side cover plate 6 is to actuate the cylinder 16 in the contracted state in the direction of extension. Moreover, in this case, in order to open both side cover plates 6, the cylinders 16 of each side cover plate 6 are actuated simultaneously. Further, in order to open one side cover plate 6, only one cylinder 16 is operated.

This operation of the cylinder 16 causes the rack gear 15 to move in the projecting direction. The rack gear 15 is a pinion gear 13 that is pivotally supported on the connecting beam 4.
Rotate.

As the pinion gear 13 rotates, the L-shaped drive link 12 that fixes the pinion gear 13,
In order to rotate the luggage compartment 5 toward the upper surface using the main drive shaft 14 as a fulcrum, the side cover plate 6 is attached to the drive link 12.
It rotates in the opening direction using the main drive shaft 14 as a fulcrum.

Moreover, since the side cover plate 6 is pivotally supported by the tip of the drive link 12 via the connecting shaft 11, it attempts to rotate in the direction of gravity using the connecting shaft 11 as a fulcrum.

However, the side cover plate 6 supports the tip of the driven link 7 with a support shaft 8 at a position spaced apart from the connection shaft 11 by a certain distance. In addition, the driven link 7
The base end of the drive link 12 is pivotally supported on the connecting beam 4 by a support shaft 10 at a constant distance from the main drive shaft 14 of the drive link 12 .

Therefore, the side cover plate 6 supports the rotational movement of the drive link 12 whose radius is the length between the main drive shaft 14 and the connecting shaft 11, and the driven link 7 whose radius is the length between the support shaft 10 and the support shaft 8. The upper half of the side surface of the luggage compartment 5 is opened while simultaneously performing the rotational movement.

When the side cover plate 6 is in an open state, the drive link 1
2 and the driven link 7 are pivotally supported on the side cover plate 6 at a constant interval, so the side cover plate is located parallel to the upper cover plate 20, reducing the amount of outward protrusion. It becomes possible to do so.

Therefore, even if the side cover plate 6 of the transport vehicle 22 is opened in a premises or the like, there is no risk that the opened side cover plate 6 will protrude greatly and come into contact with the ceiling of the premises, etc. The covering plate 6 can be completely opened. Moreover, since the amount of lateral protrusion of the side cover plate 6 of the transport vehicle 22 is reduced, it is possible to park the vehicle in a relatively compact space.

Moreover, although the transport vehicle 22 can open each side surface covering plate 6 at the same time as described above, it is also possible to open each side surface covering plate 6 separately. Therefore, even in rainy weather, the transport vehicle 22 can keep one side cover plate 6 closed and open the other side cover plate 6, so that the cargo compartment 5
The luggage is less likely to get wet due to rain, etc., and the luggage can be protected. Further, by opening only one side cover plate 6, the amount of protrusion from the carrier vehicle 22 can be further reduced, the parking space can be downsized, and economical parking can be achieved.

Also, contrary to the above, the side cover plate 6 in the open state
To close the cylinder, the extended cylinder 16 is actuated in the retracting direction, and the rack gear 15 is moved in the opposite direction. In this case, in order to close each side cover plate 6, the cylinders 16 of each side cover plate 6 are actuated simultaneously.

When the rack gear 15 is moved in the opposite direction, the pinion gear 13 connected to the rack gear 15 rotates about the main drive shaft 14 of the L-shaped drive link 12, and the side cover plate 6 rotates in the closing direction. do.

Further, this side cover plate 6 pivotally supports a support shaft 8 of an L-shaped driven link 7 at a constant distance from a connection shaft 11 of a drive link 12 . Therefore, the side cover plate 6 can rotate with a radius from the main drive shaft 14 of the drive link 12 to the connection shaft 11, and a rotation motion with a radius from the support shaft 10 of the driven link 7 to the support shaft 8. At the same time, the opening trajectory is moved in the opposite direction to cover the side surface of the column frame 2.

In addition, in this case, on the outer surface of the column 3 of the column frame 2,
Since the sliding grooves 17 for the connecting shaft 11 and the support shaft 8 are provided, the side cover plate 6 in the closed state does not protrude outward, making it possible to obtain a preferable sealed state.

Further, the drive link 12 and the driven link 7 are
Because it is shaped like a letter, when the side cover plate 6 is closed, the drive link 12 and the driven link 7
does not protrude excessively from the width of the column frame 2 and is located inside the width of the column frame 2. Therefore, smooth transfer work is possible without any baggage getting caught.

In addition, a rack gear 15 provided at the tip of the cylinder 16 is connected to a pinion gear 13 at the base end of the drive link 12 to control the forward and backward movement of the cylinder 16.
This is converted into the rotational force of the drive link 12. Therefore, the side cover plate 6 due to the rotational force of the drive link 12
The upper surface covering plate 2
It is also possible to open and close doors such as 0 etc.

Further, in the first embodiment, the cylinder 16 for opening and closing the side cover plate 6 was positioned so as to be movable in the left and right directions. However, in the second embodiment, the cylinder 16 is positioned so as to be movable in the vertical direction as shown in FIG.

Further, in each of the above embodiments, only the side cover plate 6 can be opened and closed, but in the third and fourth embodiments, the upper cover plate 20 and the side cover plate 20, which cover the upper surface of the luggage compartment 5, 6 can be opened and closed. As shown in FIG. 4 and FIG.
It is pivoted through. Further, the base end of the driven rod 23 is pivotally supported on the connecting beam 4 of the column frame 2 via the driven shaft 25.

Further, the upper surface covering plate 6 pivotally supports the tip of the driving rod 27 via the connecting shaft 26. The supporting position of the connection shaft 26 to the upper surface covering plate 6 is determined by the driven rod 2.
It is located at a constant distance from the joint axis 24 of No. 3.

Further, the drive rod 27 has a pinion gear portion 28 fixed to its base end, and this pinion gear portion 28 is pivotally supported on the connecting beam 4 of the column frame 2 via a drive shaft 30. The drive shaft 30 is located at a constant distance from the driven shaft 25.

Further, the pinion gear section 28 is connected to the rack gear section 3.
Connected to 1. This rack gear part 31 is connected to the tip of the cylinder 32 and moves back and forth in the left and right direction. This cylinder 32 is fixed to the connecting beam 4 of the column frame 2 and can be formed by an air cylinder, an oil cylinder, or the like.

In addition, the rack gear part 31 and the pinion gear part 28
When the top cover plate 20 is closed, the base end of the rack gear part 31 is connected to the pinion gear part 2.
In contact with 8. Further, when the cylinder 32 is retracted, the pinion gear part 28 rotates the drive rod 27 in the opening direction as the rack gear part 31 moves in the retracting direction. Therefore, the upper surface covering plate 20 is positioned perpendicularly to one side surface of the luggage compartment, making it possible to completely open the upper surface of the luggage compartment 5.

Further, after opening the side cover plate 6 from the side surface of the cargo compartment 5, the cylinder 32 of the top cover plate 20 in the closed state is opened.
By contracting slightly, the upper surface covering plate 20 can be raised from the upper surface of the cargo compartment in a substantially horizontal state, as shown in FIG. By operating in this way, even when the luggage compartment is loaded to its full height, the floating distance required for transfer by a forklift can be created, making it possible to perform a simple transfer operation.

In addition, in the fourth embodiment, the L-shaped drive link 12 and the L-shaped driven link 7 for opening and closing one side cover plate 6 are connected to the other side cover plate as shown in FIG. 6 is formed larger than the driving link 12 and the driven link 7, and one side cover plate 6 is
It is located above the other open side cover plate 6 and can be opened. With this configuration, when the top cover plate 20 and the side cover plate 6 are opened at the same time, one side of the luggage compartment 5 and either the left or right half of the upper surface of the luggage compartment 5 can be completely opened. I can do it. Therefore, it is possible not only to transfer the cargo using a forklift, but also to load and unload the cargo using a crane or the like, thereby improving work efficiency. It also becomes possible to transfer cargo by using a forklift and a crane at the same time.

Further, in each of the above embodiments, the upper surface covering plate 20
It does not have a mechanism to push it upward. However, in the fifth embodiment, the side cover plate 6
A cylinder 16 for opening and closing is vertically fixed to the column frame 2, and the tip of a rack gear 15 provided at the tip of the cylinder 16 is connected to the top cover plate 20 via a connecting piece 21, as shown in FIG. are doing.

When formed in this manner, when the left and right cylinders 16 are operated, the upper surface covering plate 20 is pushed upward by the cylinders 16 at the same time as the side covering plate 6 is opened, as shown in FIG. Room 5
It is possible to be located higher than the height of Therefore, there is no need for a dead space in the luggage compartment 5 for transferring the luggage floating, and the upper surface covering plate 2
Compared to conventional transportation vehicles that have a fixed zero load, the efficiency of storing cargo can be greatly improved.

Furthermore, since the top cover plate 20 operates in conjunction with the cylinder 16 that operates the side cover plate 6,
There is no need to separately form a special drive device, which simplifies the structure and enables inexpensive manufacturing.

Further, by operating one of the left and right cylinders 16, the upper surface covering plate 20 can be raised only on one side.

Effects of the Invention Since the present invention is configured as described above, in a van-type cargo transport vehicle, the open side cover plate has a small amount of outward protrusion, prevents contact with the ceiling, etc. It becomes possible to make a large opening.

Additionally, when the side cover plate is opened, the drive link and driven link will not protrude from inside the column frame and will not interfere with the transfer operation from the rear or side openings of the cargo compartment, making it smooth. This enables easy transfer work.

In addition, when the side cover plate is closed, the drive link and driven link protrude to the outside of the column frame, preventing them from coming into contact with other objects while the transport vehicle is running, allowing safe running. Make it.

In addition, since each of the side cover plates can be opened separately, the parking space is smaller and economical parking is possible compared to a conventional transport vehicle in which each side cover plate is opened at the same time.

In addition, if one side cover plate is closed and the other side cover plate is opened, when transferring cargo in rainy weather, etc., you can prevent rain from entering the cargo compartment and protect the cargo. protection.

In addition, the cylinder that operates the side cover plate is fixed at one end to the column frame and remains in an immovable position.
There is no extra burden such as weight, preventing breakdowns, and ensuring reliable operation.

In addition, since the forward and backward movement of the cylinder is converted into the rotational force of the drive link, it is possible to smoothly open and close the side cover plate by the rotational force of the drive link, and the forward and backward movement of the cylinder is directly utilized.
It is also possible to open and close doors such as the top cover plate.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a cross-sectional view of the first embodiment in which the side cover plate can be opened and closed, FIG. 2 is an explanatory diagram of the operation of the first embodiment, and FIG. The figure is a partial sectional view of the second embodiment showing the cylinder positioned vertically, FIG. 4 is a cross-sectional view of the third embodiment in which the side cover plate and the top cover plate can be opened and closed simultaneously, and FIG. The figure is a cross-sectional view of the fourth embodiment in which the side cover plate and the top cover plate can be opened and closed at the same time, and FIG. FIG. 3 is a partial cross-sectional view of an example. DESCRIPTION OF SYMBOLS 1... Loading platform, 2... Column frame, 6... Side cover plate, 7... Driven link, 10... Support shaft, 12... Driving link, 1
3...Pinion gear, 15...Rack gear, 16...Cylinder, 20...Top surface covering plate.

Claims (1)

[Scope of Claims] 1. Column frames are fixed to the ends of the loading platform in the front and back direction at regular intervals, side cover plates are separately provided to cover the side surfaces between the column frames, and each side cover plate is provided with separate side cover plates. , L
The tip of the L-shaped driven link is pivotally supported, the base end of this driven link is pivoted to the column frame via a support shaft, and the tip of the L-shaped driving link is spaced at a constant distance from the tip of the driven link. Pivotally supported on the side cover plate via
A pinion gear fixed to the base end of the drive link is rotatably supported on the column frame at a constant distance from the base end of the driven link, and the tip of a cylinder whose one end is connected to the column frame is connected to the pinion gear. A luggage compartment opening/closing device for a van-type cargo transport vehicle, characterized in that side cover plates can be opened and closed separately by connecting rack gears provided on the sides. 2. The rack gear provided at the tip of the cylinder is connected at its tip to the top cover plate that covers the top surface between the column frames, and when moving forward and backward to rotate the pinion gear,
2. A luggage compartment opening/closing device for a van-type cargo transport vehicle according to claim 1, characterized in that the top covering plate is moved upwardly.