JP2899950B2 - Automatic opening / closing device for truck loading doors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening / closing device for a truck bed opening / closing door.

[0002]

2. Description of the Related Art Since the opening / closing door on the rear surface of a truck bed is a double door type, it is very troublesome to open and close the door when loading / unloading a load.

[0003] In particular, in the case of a large truck, the door is large, which requires a lot of labor. In the transportation business, the opening and closing work greatly reduces the work efficiency.

The present invention, which focuses on such problems, is not limited to simply opening and closing the door, but is capable of automatically opening and closing the door, without reducing the space of the cargo bed, and not hindering the transportation operation. It is an object of the present invention to provide a revolutionary automatic opening / closing device for a cargo bed opening / closing door of a truck, which can be configured so that a rotating mechanism does not protrude even when it is opened and does not hinder loading / unloading of a load.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

A driving source 2 for rotating and driving the opening / closing door 1 on the rear surface of the loading platform that opens and closes is provided on the bottom rear side of the loading platform 3 of the vehicle or on the upper side of the loading platform, and transmits the rotational driving force of the driving source 2. An opening / closing drive transmission mechanism 4 for opening / closing the opening / closing door 1 is provided on the opening / closing door 1, and an operating section of the drive source 2 is provided at a position where a driver standing by a driver's seat or near the vehicle can manually operate the driving source; A turning drive fulcrum 7 is disposed at a position slightly away from the opening / closing pivot 6 of the opening / closing door 1 in the vehicle inward direction, and a turning arm 8 that turns around the turning drive fulcrum 7 is provided. And
The turning arm 8 is connected directly or indirectly to a position of the opening / closing door 1 at a position away from the opening / closing pivot 6 to connect the turning arm 8
The opening / closing transmission mechanism 4 is configured so that the opening / closing door 1 can be opened / closed and rotated by the rotation driving of the vehicle.
On the back side of the bottom of the carrier 3 or on the upper side of the carrier
The front end of the opening and closing door 1 is
An engaging portion 8A that engages with the long window engaging portion 9 provided in the installation state is provided.
The rotation of the rotation arm 8 engages with the long window engagement portion 9.
The engaging portion 8A slides inside the long window engaging portion 9 and opens.
The opening / closing drive transmission mechanism 4 so that the door 1 can be opened / closed and turned.
The present invention relates to an automatic opening / closing device for a truck bed opening / closing door, characterized in that:

Further, a driving source 2 for rotating and driving the left and right opening doors 1 on the rear side of the loading platform which opens and closes is provided on the bottom rear side of the loading platform 3 of the vehicle or on the upper side of the loading platform 3.
An open / close drive transmission mechanism 4 for transmitting the rotational drive force of the right and left doors to open and close the right and left open / close doors 1 is provided on each of the left and right open / close doors 1, and the operation operation unit of the drive source 2 is provided near the driver's seat or near the vehicle. A pivot drive fulcrum 7 is provided at a position slightly inward of the vehicle from the opening / closing pivot 6 of the opening / closing door 1, and is provided at a position where a driver standing on the vehicle can manually operate the pivot drive fulcrum. A pivot arm 8 that pivots around an axis 7 is provided, and the pivot arm 8 is connected directly or indirectly to a position distant from the opening / closing pivot 6 of the opening / closing door 1 so that the pivot arm 8 The opening / closing transmission mechanism 4 is configured so that the opening / closing door 1 can be opened / closed and rotated by a rotation drive , and the rotation arm 8 is connected to a bed portion of a vehicle.
3 on the back side of the bottom or on the top side of the loading platform.
At the end of the pivot arm 8 along the front side of the door 1
An engaging portion 8A that engages with the long window engaging portion 9 provided is provided.
Engagement with long window engagement part 9 by rotation of rotation arm 8
An automatic opening / closing device for a truck bed opening / closing door, wherein the opening / closing drive transmission mechanism 4 is configured so that the portion 8A can slide within the long window engaging portion 9 to open and close the opening / closing door 1. It is related.

Further, the opening / closing door 1 on the rear surface of the loading platform to be opened / closed is rotated.
Drive the driving source 2 to the rear side of the bottom of the bed 3 of the vehicle.
Is provided on the upper side of the loading platform, and the rotational driving force of the driving source 2 is
An open / close drive transmission mechanism 4 for transmitting and opening / closing the door 1
An operation door of the drive source 2 is provided on an opening / closing door 1 to operate the vehicle.
A position that can be manually operated by a driver who stands next to the vehicle or near the vehicle
From the opening / closing pivot 6 of the opening / closing door 1 to the inside of the vehicle
The rotation drive fulcrum 7 is disposed at a position slightly away from the
A pivot arm 8 that pivots around the dynamic drive fulcrum 7 is provided.
Then, the rotating arm 8 is separated from the opening / closing pivot 6 of the opening / closing door 1.
Connected directly or indirectly to the
The opening and closing door 1 can be opened and closed by the rotation drive of the arm 8.
And the drive source 2 is connected to a vehicle.
Near the center on the bottom rear side or top side of the loading platform 3
From the opening / closing pivot 6 of the opening / closing door 1 toward the inside of the vehicle.
The rotation driving fulcrum portions 7 are respectively disposed at positions slightly apart from each other.
A turning arm 8 that turns around the turning drive fulcrum 7 is provided.
And the drive source 2 and the rotational drive fulcrum 7 are connected to drive
A chain for transmitting the rotation driving force of the power source 2 to the rotation drive fulcrum 7
A rotation transmission band 10 such as a belt or belt is
The rotational driving force of the driving source 2 is transmitted through the belt 10 to the rotational driving fulcrum.
7, the rotation arm provided at the rotation drive fulcrum 7.
8 so that the opening and closing door 1 can be opened and closed.
The present invention relates to an automatic opening / closing device for a truck bed opening / closing door, wherein the transmission mechanism 4 is configured.

[0009] Also, the left and right sides of the back of the loading platform that open and close with double doors.
A drive source 2 for rotating and driving the door 1 is connected to the bottom of the bed 3 of the vehicle.
The drive source 2 is provided on the back side or on the upper side of the bed portion 3.
To open and close the left and right doors 1
The open / close drive transmission mechanism 4 is installed on each of the left and right doors 1
The operating unit of the drive source 2 is connected to the driver's seat of the vehicle or the vehicle.
It is provided in a position where the driver standing by
A little distance from the opening / closing pivot 6 of the opening / closing door 1 toward the inside of the vehicle
The rotation driving fulcrum 7 is disposed at the position,
A pivot arm 8 that pivots around an axis 7 is provided.
Move the arm 8 away from the pivot 6 of the door 1.
Connected to or indirectly connected to the rotary arm 8
The opening and closing of the opening and closing door 1 can be opened and closed by movement.
A transmission mechanism 4 is configured, and the rotating arm 8 is mounted on a bed portion of a vehicle.
3 on the back side of the bottom or on the top side of the loading platform.
At the end of the pivot arm 8 along the front side of the door 1
An engaging portion 8A that engages with the long window engaging portion 9 provided is provided.
Engagement with long window engagement part 9 by rotation of rotation arm 8
The portion 8A slides inside the long window engaging portion 9 to move the door 1
The open / close drive transmission mechanism 4 is configured to be able to open / close and rotate.
Then, the drive source 2 is connected to the bottom rear side of the bed portion 3 of the vehicle.
Is located near the center of the upper side, and pivots the opening and closing of the opening and closing door 1
Rotationally driven to a position slightly away from the part 6 toward the inside of the vehicle
A fulcrum 7 is provided, and the rotation drive fulcrum 7 is used as an axis.
A rotating arm 8 that moves is disposed, and the driving source 2 is rotated.
The fulcrum 7 is connected to rotate the drive source 2 to rotate the drive force.
Rotation transmission band such as a chain or belt transmitted to the fulcrum 7
10 and the rotation of the drive source 2 through the rotation transmission band 10
The driving force is transmitted to the rotation drive fulcrum 7 and the rotation drive fulcrum 7 is transmitted.
The opening and closing door 1 is opened and closed by rotating the turning arm 8 provided at
The present invention relates to an automatic opening / closing device for a truck bed opening / closing door , wherein the opening / closing transmission mechanism 4 is configured to be movable .

Further, even if the opening / closing transmission mechanism 4 operates, the opening prevention device 11 for preventing the opening / closing of the opening / closing door 1 against this rotational driving force is provided in the opening / closing door 1 or the opening / closing transmission mechanism 4. An automatic opening / closing device for a truck bed opening / closing door according to any one of claims 1 to 4, characterized in that:

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention (how to implement the invention), which is considered to be the best, will be briefly described with reference to the drawings, showing its operational effects.

When the drive source 2 is operated by operating the operation operation unit, the rotational driving force is transmitted to each of the doors 1 via the opening / closing drive transmission mechanism 4, and the doors 1 are automatically opened and closed.

More specifically, each turning arm 8 is turned by each turning driving fulcrum 7 by the turning driving force of the driving source 2,
Each opening / closing door 1 is opened / closed by this turning arm 8.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 4 show a first embodiment of the present invention.

In the present embodiment, a drive source 2 for rotating and driving left and right doors 1 that open and close in a double-opening manner is provided on the back side of the bottom of a bed portion 3 of a vehicle. An opening / closing drive transmission mechanism 4 for opening and closing the opening / closing door 1 is provided on each of the left and right opening / closing doors 1, and the operation operating section of the drive source 2 can be manually operated by a driver standing at the driver's seat of the vehicle and near the vehicle. On the outer surface of the carrier.

More specifically, a motor is provided as a drive source 2 near the center of the bottom rear surface near the rear of the bed portion 3 of the vehicle, and a speed reducer 2A is provided side by side with this motor and rotates at a predetermined speed. A rotating shaft 2B is provided.

A turning drive fulcrum 7 is provided on the bottom rear surface of the loading platform 3 slightly away from the opening / closing pivot 6 of the opening / closing door 1 at the rear left / right corner of the loading platform 3 inward of the vehicle. A rotation arm 8 that rotates around the rotation drive fulcrum 7 is provided, and the rotation shaft 2B of the drive source 2 and the left and right rotation drive fulcrum 7 are provided.
And the rotational drive force of the drive source 2 is connected to the rotational drive fulcrum 7.
A rotation transmission band 10 (chain) for transmitting the rotation driving force of the drive source 2 to the rotation driving fulcrum 7 via the rotation transmission band 10 is provided. The opening / closing transmission mechanism 4 is configured so that the turning arm 8 provided on the left and right sides can be turned to open and close the left and right doors 1 respectively.

In this embodiment, the connection between the rotating arm 8 and the opening / closing door 1 is performed by disposing the rotating arm 8 on the bottom rear surface side of the bed 3 of the vehicle. An engaging portion 8A is provided at the front end of the opening / closing door 1 for engaging with a long window engaging portion 9 provided along the front side of the opening / closing door 1, and the turning of the turning arm 8 causes the long window to be engaged. The engaging portion 8A engaged with the portion 9 can open and close the opening and closing door 1 while sliding in the long window engaging portion 9. Therefore, in this embodiment, the opening and closing door 1
In the closed state, a long window engaging portion 9 is slightly protruded from the front of the opening and closing door 1, and the engaging portion 8 A of the rotating arm 8 engaging with the opening and closing door 1 is attached to the opening and closing door 1. The drive source 2 and the opening / closing drive transmission mechanism 4 (the rotation arm 8 and the rotation drive fulcrum 7) do not protrude, and do not hinder running, and have a good appearance. Even if the opening / closing door 1 is widened so as to be along the side surface of the loading platform 3, the rotating arm 8 is
It can be constructed so that it does not protrude from the inner surface at all, there is no problem in loading and unloading, and it is safe because there is no protrusion.

In this embodiment, a length adjusting mechanism 12 such as a turn buckle is provided on both sides of at least one of the rotation transmission bands 10, and each of the length adjusting mechanisms 12 is provided on both sides. By adjusting, the turning drive fulcrum 7 is adjusted and turned to adjust the starting position of the other turning arm 8 with respect to the one turning arm 8 so that the predetermined opening / closing door 1 always moves with respect to the other opening / closing door 1. It is configured so that it can be adjusted and set so that the center edge of the other door 1 is overlapped with the center edge of the one door 1.

Further, each opening / closing door 1 is provided with an opening preventing device 11 for preventing the opening / closing of each opening / closing door 1 against the rotational driving force even when the opening / closing transmission mechanism 4 operates.

More specifically, a rotation stopper body 11A that overlaps the upper and lower edges of the door 1 on the upper and lower edge frame portions of each door 1.
And a drive device 11B for switching the rotation of the rotation stopper body 11A is disposed on the bottom rear surface side of the loading platform 3. The drive transmission between the drive device 11B and the upper rotation stopper body 11A is performed by an air pipe or the like.

Accordingly, the driving device 11B is operated to rotate the rotation stopper body 11A, and the rotation stopper body 11A covers and overlaps the front of the upper and lower edges of the opening / closing door 1 from the edge frame. Thus, the opening and closing rotation of each opening and closing door 1 is prevented,
The open / close door 1 is not opened regardless of whether the drive source 2 is operated by the operation operation unit.

By providing the operation section of the opening prevention device 11 in the driver's seat, it is confirmed that it is not dangerous even if the driver opens the opening / closing door 1, and the opening prevention device 11 is operated to not release the lock. As long as the opening and closing door 1 does not automatically open, safety is improved.

More specifically, in the present embodiment, the operation control unit of the opening prevention device 11 and the operation control unit of the opening / closing door 1 are used as a common operation unit. When operated, the lock is released, and when the switch is further pressed, the operation operation unit is operated, and the opening / closing door 1 automatically starts to open and rotate. When the switch is stopped from being pressed, the opening / closing door 1 stops at that position. By continuing to press, the door is largely opened until the stopper of the door 1 is hit.

When the other switch is depressed, the other switch is depressed to rotate in the same manner as described above, and when the opening / closing door 1 is completely closed, the opening preventing device 11 is automatically operated and locked. I have.

FIG. 5 shows a second embodiment of the present invention.

In this embodiment, separate driving sources 2 are provided at the positions of the left and right rotation driving fulcrums 7, respectively. The rotation driving fulcrum 7 is provided with a rotation arm 8, and the rotation arm 8 is driven. Source 2
The opening / closing drive transmission mechanism 4 is provided by providing a link arm 8B that is connected to the middle of the link.

FIGS. 6 and 7 show that the rotating arm 8 is
An engaging portion 8 provided on the upper side of the
FIG. 9 illustrates a third embodiment and a fourth embodiment showing a case where a long window engaging portion 9 with which A is engaged is provided above the opening and closing door 1;
The third embodiment shown in FIG.
In the fourth embodiment shown in FIG. 7, one open / close door 1 is driven to open and close.

FIG. 8 is an explanatory sectional view of a main part in the fourth embodiment.

The present invention is not limited to this embodiment. For example, the drive source 2 may be provided on the bottom rear surface or the upper ceiling (rear surface) so as not to take up the space of the loading platform 3, and may be provided at the center thereof for each time. It may be transmitted to the dynamic drive fulcrum 7 or may be provided separately for each of the rotary drive fulcrum 7, and the type may be a pneumatic actuator or a hydraulic actuator.

As described above, the present invention can be applied to a double door type rear door or a single door type rear door.

[0033]

Since the present invention is constructed as described above, the opening / closing door is automatically opened / closed by the operation of the operation operation section, and furthermore, an apparatus for automation of this drive source, opening / closing drive transmission mechanism and the like. Even if adding a space, it does not narrow the space of the loading platform part and does not hinder the loading and unloading of cargo, and also does not directly provide a rotation drive fulcrum part that is a fulcrum that is rotated by the drive source at the opening and closing fulcrum of the door. The pivot arm is disposed at a position slightly away from the inside of the vehicle, and the rotating arm is directly or indirectly connected to a position distant from the opening / closing portion of the opening / closing door. An opening / closing drive transmission mechanism such as a rotation drive fulcrum and a rotation arm can be provided without greatly protruding outward from the outside, and the traveling safety is excellent and the appearance is good.

In addition, according to the present invention, the rotating arm is mounted on a vehicle.
On the bottom back or top side of the
At the front end of the opening / closing door at the end of the moving arm
An engaging portion that engages with the long window engaging portion is provided.
The engaging portion engaged with the long window engaging portion by the rotation is in the long window engaging portion.
Opening / closing drive transmission that can slide and open / close the opening / closing door
Mechanism so that the door can be rotated even when the door is open.
The moving arm does not protrude from the open door and is safe
Truck opening / closing door that is well-organized and is more practical
Automatic opening and closing device.

According to the second aspect of the present invention, both of the frequently used double-opening doors can be opened and closed.

Further, in the invention of claim 3, wherein, work
The opening / closing door is automatically opened and closed by the operation of
For the automation of this drive source, open / close drive transmission mechanism, etc.
Loading without reducing the space of the loading platform even if additional equipment is added
It does not interfere with loading and unloading, and is rotated by the drive source
The rotation drive fulcrum, which is the supporting fulcrum,
It is installed at a position slightly away from the inside of the vehicle without
Position the pivot arm away from the open / close pivot of the door.
Connected directly or indirectly to the
The drive transmission mechanism rotates without protruding significantly outside the vehicle.
Equipped with an open / close drive transmission mechanism such as a dynamic drive fulcrum and a rotating arm.
It has excellent driving safety and good appearance.

According to the fifth aspect of the present invention, it is possible to lock the opening of the door regardless of whether the drive source is operated by the operation operation unit, and to prevent the door from being opened and closed accidentally, which is extremely safe. It will be a revolutionary automatic opening / closing device for the truck loading door.

[Brief description of the drawings]

FIG. 1 is an explanatory external view of a closed state according to the present embodiment.

FIG. 2 is an explanatory front view of a closed state according to the present embodiment.

FIG. 3 is an explanatory plan view of a main part in a closed state according to the present embodiment.

FIG. 4 is an explanatory plan view of a main part in an open state of the embodiment.

FIG. 5 is an explanatory plan view of a main part in a closed state according to the second embodiment.

FIG. 6 is an explanatory external view of a closed state according to a third embodiment.

FIG. 7 is an explanatory front view of a closed state according to a fourth embodiment.

FIG. 8 is an explanatory plan sectional view of a main part of a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening / closing door 2 Drive source 3 Carrier part 4 Opening / closing drive transmission mechanism 6 Opening / closing pivoting part 7 Rotating drive fulcrum part 8 Rotating arm 8A engaging part 9 Long window engaging part 10 Rotating transmission band 11 Opening prevention device

Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E05F 15/12 E05D 15/28-15/30 B60J 5/10

Claims (5)

(57) [Claims] 1. A driving source 2 for rotating and driving an opening / closing door 1 on a back surface of a loading platform that opens and closes is provided on a bottom rear surface side of a loading platform portion 3 of a vehicle or on an upper side of the loading platform portion, and the rotational driving force of the driving source 2 is provided. An opening / closing drive transmission mechanism 4 for transmitting and opening / closing the opening / closing door 1 is provided on the opening / closing door 1, and an operation operation unit of the drive source 2 is provided at a position where a driver standing by or near the vehicle can manually operate the driver. A pivot driving fulcrum 7 is disposed at a position slightly away from the opening / closing pivot 6 of the opening / closing door 1 in the vehicle inward direction, and a pivot arm 8 that pivots around the pivot driving fulcrum 7 is provided. Arrange,
The turning arm 8 is connected directly or indirectly to a position of the opening / closing door 1 at a position away from the opening / closing pivot 6 to connect the turning arm 8
The opening / closing transmission mechanism 4 is configured so that the opening / closing door 1 can be opened / closed and rotated by the rotation driving of the vehicle.
On the back side of the bottom of the carrier 3 or on the upper side of the carrier
The front end of the opening and closing door 1 is
An engaging portion 8A that engages with the long window engaging portion 9 provided in the installation state is provided.
The rotation of the rotation arm 8 engages with the long window engagement portion 9.
The engaging portion 8A slides inside the long window engaging portion 9 and opens.
The opening / closing drive transmission mechanism 4 so that the door 1 can be opened / closed and turned.
An automatic opening / closing device for a truck bed opening / closing door, characterized in that: 2. A drive source 2 for rotating and driving a door 1 on the left and right sides of a back surface of a loading platform that opens and closes in a double-opening manner is provided on the bottom rear side of the loading platform 3 or on the upper side of the loading platform 3 of the vehicle. An open / close drive transmission mechanism 4 for transmitting a driving force to open and close the left and right doors 1 in a double-opening manner is provided on each of the left and right doors 1,
The operation unit of the drive source 2 is provided at a position where the driver standing by the driver's seat or the vehicle can manually operate the driver, and at a position slightly away from the opening / closing pivot 6 of the opening / closing door 1 in the vehicle inward direction. A rotation drive fulcrum 7 is provided, and a rotation arm 8 that rotates about the rotation drive fulcrum 7 is provided. The rotation arm 8 is separated from the opening / closing pivot 6 of the door 1. The opening / closing transmission mechanism 4 is configured so that the opening / closing transmission mechanism 4 can be directly or indirectly connected to the closed position so that the opening / closing door 1 can be opened / closed by the turning drive of the turning arm 8. Of the bed part 3
It is installed on the back side of the bottom or the top of the loading
Provided along set state to the distal end of the arm 8 on the front side of the door 1
An engaging portion 8A for engaging with the long window engaging portion 9 is provided.
Engaging portion 8 engaged with long window engaging portion 9 by rotation of arm 8
An automatic opening / closing device for a truck bed opening / closing door, wherein the opening / closing drive transmission mechanism 4 is configured so that A can slide in the long window engaging portion 9 to open and close the opening / closing door 1. 3. An opening / closing door 1 on the back side of a loading platform that opens and closes is rotationally driven.
The driving source 2 to be moved to the rear side of the bottom of
Provided on the upper side of the base to transmit the rotational driving force of this drive source 2
Open / close drive transmission mechanism 4 that opens and closes door 1
The operation unit of the drive source 2 is provided on a door 1 and a driver's seat of a vehicle is provided.
Or, set it in a position where the driver standing by the vehicle can operate it by hand.
From the opening / closing pivot 6 of the opening / closing door 1 toward the inside of the vehicle.
The rotation drive fulcrum 7 is disposed at a position away from the
A pivot arm 8 that pivots around the pivot point 7 is provided,
The turning arm 8 is separated from the opening / closing pivot 6 of the opening / closing door 1.
Connected directly or indirectly to the pivot arm 8
So that the opening and closing door 1 can be opened and closed by the rotation drive of
The open / close transmission mechanism 4 is configured to drive the drive source 2
Arranged near the center on the bottom rear side or top side of the base 3
In addition, from the opening / closing pivot 6 of the opening / closing door 1,
The rotation driving fulcrum portions 7 are disposed at positions separated from each other,
A pivot arm 8 that pivots around the dynamic drive fulcrum 7 is provided.
Then, the drive source 2 and the rotational drive fulcrum 7 are connected to drive
A chain for transmitting the rotational drive force of the source 2 to the rotational drive fulcrum 7
A rotation transmission band 10 such as a belt or belt
The rotational driving force of the driving source 2 is transmitted through the belt 10 to the rotational driving fulcrum 7.
The rotation arm 8 provided at the rotation drive fulcrum 7
So that the opening and closing door 1 can be opened and closed.
An automatic opening / closing device for a truck bed opening / closing door, comprising a delivery mechanism 4 . 4. A door on the left and right sides of the back of the loading platform which opens and closes in a double door.
The drive source 2 for rotating the drive 1 is mounted on the back of the bottom of the bed 3 of the vehicle.
Side of the drive source 2
Transmits the driving force to open and close the left and right doors 1
Opening and closing drive transmission mechanism 4 is provided on each of the left and right opening and closing doors 1,
The operation unit of the drive source 2 is connected to the driver's seat of the vehicle or the vehicle.
Provided at a position where a standing driver can operate it manually,
A position slightly away from the opening / closing pivot 6 of the door 1 toward the inside of the vehicle
The rotation drive fulcrum 7 is disposed on the
A rotation arm 8 that rotates as an axis is provided, and this rotation arm is provided.
The door 8 directly to the position away from the opening / closing pivot 6 of the door 1.
Or indirectly connected to rotate the rotary arm 8
The opening / closing transmission so that the opening / closing door 1 can be further opened / closed and rotated.
A mechanism 4 is formed, and the rotating arm 8 is connected to the bed 3 of the vehicle.
It is installed on the back side of the bottom or the top of the loading
Provided at the end of arm 8 alongside the front side of door 1
An engaging portion 8A for engaging with the long window engaging portion 9 is provided.
Engaging portion 8 engaged with long window engaging portion 9 by rotation of arm 8
A slides inside the long window engaging portion 9 to open and close the door 1
The opening / closing drive transmission mechanism 4 is configured to be rotatable,
The drive source 2 is connected to the bottom rear side or the upper part of the bed 3 of the vehicle.
Is provided in the vicinity of the center of the side, and the opening / closing pivot 6 of the opening / closing door 1
Rotating drive fulcrum at a position slightly away from vehicle inside
7 is arranged, and is turned around the turning drive fulcrum 7 as an axis.
A rotation arm 8 is provided, and the drive source 2 and a rotation drive fulcrum are provided.
7 and the rotational drive force of the drive source 2 is coupled to the rotational drive fulcrum.
7 a rotation transmission band 10 such as a chain or a belt for transmission.
And the rotational driving force of the driving source 2 through the rotational transmission band 10.
Is transmitted to the rotation drive fulcrum 7 and provided on the rotation drive fulcrum 7
The opening and closing door 1 can be opened and closed by rotating the rotating arm 8.
An automatic opening and closing device for a truck bed opening and closing door , wherein the opening and closing transmission mechanism 4 is configured as described above . 5. An opening prevention device 11 for preventing the opening and closing of the opening and closing door 1 against the rotational driving force even when the opening and closing transmission mechanism 4 operates, is provided in the opening and closing door 1 or the opening and closing transmission mechanism 4. The automatic opening / closing device for a cargo bed opening / closing door according to any one of claims 1 to 4, characterized in that: