KR102330557B1 - Automatic rear door opening and closing apparatus of delivery truck - Google Patents

Abstract

The present invention relates to an automatic opening and closing device for a rear door of a delivery vehicle, and the purpose of the present invention is to shorten the time required for delivering goods and decrease labor intensity by enabling the rear door to open and close automatically. To this end, the present invention provides a rear door opening and closing device comprising: a rear door in which multiple unit door panels (30) are connected by door connection brackets (31) so that it can be opened and closed in an overhead manner; a door roller (20) provided on both sides of a connection portion of the unit door panels (30); and a pair of door guide rails (10) provided to guide movement of the door roller (20) and including a vertical part (10a) provided inside a rear portion of a loading box (100) of the vehicle, horizontal parts (10c) provided on both sides of an inner upper portion of the loading box, a corner part (10b) connecting the vertical part (10a) and the horizontal part (10c) in an arc shape. The rear door opening and closing device of the delivery vehicle further comprises a chain driving device provided at a lower portion of the horizontal part (10c) of the door guide rail (10), a chain connecting bracket (50) provided on both sides of the rear door to be connected to the chain, and a remote controller (60) for driving the chain driving device remotely, wherein a chain is rotated by operation of the remote controller (60) to open and close the rear door.

Description

Automatic rear door opening and closing device of goods delivery vehicle {AUTOMATIC REAR DOOR OPENING AND CLOSING APPARATUS OF DELIVERY TRUCK}

The present invention relates to an automatic door opening and closing device for a goods delivery vehicle, and more particularly, by automatically opening and closing the rear door provided at the rear of the loading box of the goods delivery vehicle by means of a remote controller, it is possible to reduce the time required for delivery of goods. It relates to an automatic opening and closing device for a rear door of a goods delivery vehicle that can reduce the labor intensity of the goods deliverer and prevent the loss of goods.

Recently, as the number of online purchases has increased, the number of vehicles used to transport and deliver box-packed parcels is increasing.

The goods delivery vehicle has a structure in which a box-shaped loading box is mounted on a chassis of a small truck.

1 to 3 show an example of such a goods delivery vehicle, and FIG. 1 is a side view, FIG. 2 is a rear view, and FIG. 3 is an opening and closing device for the rear door of the loading box (hereinafter simply referred to as 'rear door').

The door of the conventional goods delivery vehicle is composed of a rear right door (RD) and a rear left door (LD) provided on the rear side of the loading box 100 . In some cases, a side door (SD) is further provided on the side of the loading box 100 for the convenience of loading and unloading goods.

The rear right door (RD), the rear left door (LD) and the side door (SD) are generally configured in a hinged manner.

That is, the rear right door RD is opened and closed while rotating around the right rotating member 110 provided on the upper and lower portions of the rear right side of the loading box 100 , and the rear left door LD is the loading box 100 . It is opened and closed while rotating around the left rotating member 120 provided on the upper and lower portions of the rear left side.

In addition, a right door locking bar 112 for fixing the right door is provided on the left outside of the rear right door RD in the vertical direction, and on the right outside of the rear left door LD, the left side A left door locking bar 122 for fixing the door is provided in the vertical direction.

The right door locking bar 112 is assembled to the rear right door RD by a plurality of right brackets 113 arranged at regular intervals, and the left door locking bar 122 is formed by a plurality of left brackets 123 . It is assembled on the rear left door (LD).

In addition, a right locking lever 115 is provided under the right door locking bar 112 , and a left locking lever 125 is provided under the left door locking bar 122 .

In addition, the right door locking bar 112 and the left door locking bar 122 are provided to move up and down by a predetermined distance by a cam device (not shown).

With the above structure, as shown in FIG. 2 , when the right door locking lever 115 is rotated to the right, the right door locking bar 112 moves upward to be locked with the rear of the loading box.

In addition, when the right door locking lever 115 is rotated to the left, the right door locking bar 112 moves downward and locking with the rear side of the loading box can be released.

Meanwhile, a right lever fixing member 114 for fixing the right door locking lever 115 is further provided under the rear right door RD.

By the right lever fixing member 114, the right door locking lever 115 may be rotated to the right to lock the right door, and then the right door locking lever 115 may be maintained in a fixed state.

In addition, the left door locking bar 122, the left bracket 123, the left locking lever 125 and the left lever fixing member 124 are also provided in the left door LD, and their structure is the above-mentioned right door (RD). same as in the case of

And the conventional rear door opening and closing device, as shown in FIG. 3, has an upper bracket 113 and a lower bracket 114 fixed to the rear right side of the loading box 100, and one end of the upper bracket 113 and the lower It is assembled to the bracket 114, and the other end is configured to include a rotation plate 110 coupled to the right door (RD).

The upper bracket 113 has a loading box assembly hole 113a and a bolt through hole 113b for fixing to the loading box 100, and a loading box assembly hole 114a for fixing to the loading box 100 also in the lower bracket 114. ) and bolt through-holes 114b are formed.

In addition, the upper bracket 113 and the lower bracket 114 are integrally formed, and have a structure in which interference does not occur when the rotation plate 110 is fully tilted at 270 degrees.

A door fixing part 111 is provided on one side of the rotating plate 110 , and a door assembly hole 111a for coupling with the door is formed in the door fixing part 111 .

With the above structure, the rotation plate 110 may be fixed to the right door RD using a bolt or the like.

Also, on the other side of the rotation plate 110 , a bolt through part 112 is formed to be assembled between the upper bracket 113 and the lower bracket 114 .

Insert the bolt through part 112 of the rotation plate 110 between the upper bracket 113 and the lower bracket 114, and assemble the assembly bolt 115 with the washer 115a interposed therebetween, and then a washer ( When the nut 116 is assembled via 116a), the assembly of the opening and closing device is completed.

According to the above-described rear door opening and closing device, the rotation plate 110 assembled with the rear door can be rotated around the assembly bolt 115 .

Accordingly, it is possible to open and close the rear right door (RD) while rotating until it comes into contact with the right side of the loading box 100 , that is, within a 270 degree range.

Meanwhile, the left door LD is also assembled and opened and closed in the same manner as the above-described right door RD.

However, the conventional rear door opening/closing structure has a disadvantage in that a large amount of time is consumed to open and close the door since the user manually opens and closes the door.

That is, in order to open the door by the conventional method, the locking state of the right locking lever is released, the right door (RD) is rotated 270 degrees to adhere to the right side of the loading box, and then the locking state of the left locking lever is released again, Rotate the left door (LD) by 270 degrees to attach it to the left side of the loading box.

Also, when the door is closed, the above operation must be repeated again.

Accordingly, when it is necessary to open and close the door from time to time for delivery of goods, such as a delivery vehicle, a lot of time is wasted in opening and closing the door, and there is a problem in that delivery of the goods is delayed.

In addition, when the goods delivery vehicle is a medium-sized truck, the size and weight of the rear door are also increased, so that it takes a lot of force to open and close the heavy-duty door.

As a result, the labor intensity of the goods carrier increases, and there is a problem that may cause musculoskeletal disorders during long hours of work.

In addition, in the case of the conventional rear door opening and closing method, in the case of a narrow alley, the door cannot be opened even when the vehicle is stopped.

Accordingly, since the vehicle must be parked in a wide place where the door can be opened, there is a problem in that the delivery time of the goods is further delayed.

Meanwhile, in consideration of the above problems, a method of manufacturing the rear door in a shutter structure has been proposed.

However, in the above-described shutter method, when the shutter is closed, it must be manually closed, and when the shutter is raised, it is inconvenient to manually raise the shutter to a certain height.

Korean Patent Registration No. 10-1556777 Korean Patent Registration No. 10-1666168 Korea Registered Utility Model No. 20-0470342

An object of the present invention is to solve the problems of the prior art, and it is an object of the present invention to enable simple and easy opening and closing of a rear door of a goods delivery vehicle by a remote controller.

Another object of the present invention is to reduce the time required for delivery of goods by allowing the rear door to be opened and closed completely automatically.

Another object of the present invention is to make it possible to easily open and close a heavy rear door provided in a medium or large vehicle.

Another object of the present invention is to reduce the labor intensity of the goods carrier and to reduce the possibility of occurrence of musculoskeletal disorders.

In order to achieve the above object, the present invention provides a rear door in which a plurality of unit door panels are connected by a door connection bracket and open and close in an overhead manner; a door roller provided on both sides of the connecting portion of the unit door panel; A vertical portion provided inside the rear of the loading box of the vehicle, a horizontal portion provided on both sides of the inner upper portion of the loading box, and a corner portion connecting the vertical portion and the horizontal portion in an arc shape to guide the movement of the door roller In the rear door opening and closing device of a goods delivery vehicle comprising a pair of door guide rails, the chain driving device provided at the lower part of the horizontal part of the door guide rail, respectively, provided on both sides of the rear door and connected to the chain A chain connection bracket and a remote controller for wirelessly driving the chain driving device are further provided, and the chain is rotated by the operation of the remote controller to open and close the rear door, and the chain driving device includes: A drive sprocket provided in the sprocket, driven sprockets provided on both sides of the rear upper part of the loading box, a roller chain connecting the drive sprocket and the driven sprocket, a drive shaft connecting the pair of drive sprockets to each other, and the drive shaft It is configured to include a driving motor provided in the center, and the chain support rail for supporting the roller chain is provided horizontally along the longitudinal direction of the loading box and includes an upper chain support rail for supporting the upper chain, and the longitudinal direction of the loading box. It is provided horizontally along with a lower chain support rail to support the lower chain, and the roller of the roller chain moves horizontally on the upper chain support rail and the lower chain support rail, and connects the rear door and the chain. The chain connection bracket has an angle shape, and includes a vertical member seated on the upper side of the roller of the roller chain, and a horizontal member assembled on the unit door panel, wherein the vertical member includes a plurality of slots fitted on the upper side of the roller of the roller chain. wherein the plurality of slots of the vertical member have an arc-shaped upper portion corresponding to the shape of the roller, and the chain connection bracket is provided on both sides of the uppermost unit door panel, respectively, and is connected to the chain, and the chain is connected to the chain. The connection bracket is inserted into the upper part of the roller of the chain and is characterized in that it moves like the roller chain.

In addition, the door guide rail is characterized in that it has an arc portion corresponding to the arc-shaped cross section of the door roller.

In addition, door roller assembly members are assembled on both sides of the unit door panel.

In addition, the door roller assembly member is characterized in that the shaft insertion part into which the roller shaft of the door roller is inserted is provided.

In addition, each unit door panel has a structure in which a convex part is provided on the upper part and a concave part is provided on the lower part, so that the convex part and the concave part are molded to each other in a straight section, and the convex part and the concave part adjacent to each other are spread apart in a corner section. characterized.

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In addition, the drive motor is characterized in that it is a reduction motor that is directly connected to the drive shaft to rotate the drive shaft forward and reverse.

In addition, a driving sprocket receiving portion for accommodating the driving sprocket is provided at the front of the loading box, and a chain tensioner for accommodating the driven sprocket at the rear of the loading box and at the same time adjusting the tension of the roller chain is provided.

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In addition, the upper chain support rail and the lower chain support rail are formed integrally with the support frames provided on both sides of the inside of the loading box, and the cover is assembled to the support frame.

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In addition, the upper front and lower rear of the vehicle loading box, characterized in that the limit switch for limiting the movement of the door is further provided.

According to the present invention, there is an effect that the rear door of the goods delivery vehicle can be easily opened and closed by a remote controller without the need to manually open and close the rear door.

In other words, the delivery driver can open the rear door while getting out of the driver's seat, and easily close the rear door while turning around with the goods.

Accordingly, there is an effect that can shorten the time required for opening and closing the door, and significantly shorten the time required for the delivery of goods.

In addition, there is an effect that can easily open and close a heavy door provided in a medium or large vehicle.

In addition, there is an effect that can reduce the occurrence of musculoskeletal disorders by reducing the labor intensity of the goods carrier.

In addition, since it is possible to prevent the case of delivering goods with the rear door open, there is an effect of preventing the loss of goods.

1 is a side view of an article delivery vehicle according to the prior art;
Figure 2 is a rear view of the goods delivery vehicle according to the prior art.
Figure 3 is a perspective view showing a door opening and closing device of the goods delivery vehicle according to the prior art.
Figure 4 is a perspective view schematically showing a rear door opening and closing device according to the present invention.
Figure 5 is a side view showing the rear door guide rail and chain according to the present invention.
6 is a plan view showing a rear door driving device according to the present invention.
7 is a side view showing a unit door panel according to the present invention.
8 is a view showing a door roller and a guide rail according to the present invention.
9 is a perspective view showing an assembly state of the door roller and the door connecting bracket according to the present invention.
10 is a plan sectional view of the rear door according to the present invention.
11 is a view showing a chain according to the present invention.
12 is a view showing the coupling relationship between the chain connection bracket and the door and the chain according to the present invention.
13 is a perspective view showing a coupling relationship between a chain connection bracket and a chain according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

For convenience, the rollers provided at both ends of the rear door are referred to as “door rollers 20”, and the rollers constituting the roller chain 46 are simply referred to as “rollers 46a”.

A rear door automatic opening and closing device according to the present invention includes, as shown in FIGS. 4 to 6 , a rear door in which a plurality of unit door panels 30 are connected by a door connection bracket 31 to open and close in an overhead manner; a door roller 20 provided on both sides of the connection portion of the unit door panel 30; A vertical portion 10a provided inside the rear of the loading box 100 of the vehicle, a horizontal portion 10c provided on both sides of the inner upper portion of the loading box, and the vertical portion 10a and the horizontal portion 10c are connected in an arc shape and a pair of door guide rails (10) configured to include a corner portion (10b) to guide the movement of the door roller (20).

In addition, the present invention provides a chain driving device provided at the lower portion of the horizontal portion 10c of the door guide rail 10, a chain connection bracket 50 provided on both sides of the rear door and connected to the chain, and the chain A remote controller 60 for wirelessly driving the driving device is further provided, and the chain is rotated by the operation of the remote controller 60 to automatically open and close the rear door.

That is, according to the present invention, the rear door is configured by connecting a plurality of unit door panels 30 to each other, and a door guide rail 10 having an approximately "L" shape is provided over the upper and rear sides of the loading box.

In addition, a plurality of door rollers 20 are provided on both sides of the unit door panel 30 , and the plurality of door rollers 20 ride on the door guide rail 10 .

In addition, a chain is provided on both upper sides of the loading box, and the chain and the rear door are connected by a chain connection bracket (50).

Accordingly, the rear door can be opened and closed by the rotation of the chain.

First, the structure of the rear door and the door guide rail according to the present invention will be described in detail.

In the rear door of the present invention, as shown in FIG. 7 , each unit door panel 30 is connected to each other in the vertical direction by the door connection bracket 31 .

Here, each unit door panel 30 is provided with a convex portion 30a on the upper portion and a concave portion 30b on the lower portion.

By the above-described structure, in the straight section, the convex portion 30a and the concave portion 30b are mated with each other to become a flat state, and in the corner section, as shown in FIG. 5 , adjacent to the convex portion 30a The concave portions 30b are widened from each other.

Accordingly, the rear door can be moved along the "L"-shaped door guide rail 10 .

The door connection bracket is provided in the central part to connect each unit door panel 30, and is provided on both sides of the door to connect each unit door panel and at the same time to assemble the door roller 20. can

As shown in FIG. 7 , the door connection bracket 31 connecting each unit door panel 30 in the vertical direction has a structure in which two plates are connected to each other by a hinge part 31a.

Accordingly, the unit door panels 30 adjacent to each other can be bent and smoothly pass through the corner portions 10b of the door guide rail 10 .

On both sides of each unit door panel 30, as shown in FIGS. 8 and 9, door roller assembly members 32 for assembling the door roller 20 are provided.

That is, the door roller assembly member 32 has a structure in which the shaft insertion part 32a is further provided in the door connection bracket 31 .

Accordingly, the door roller 20 can be assembled while connecting the adjacent unit door panels 30 to each other at both ends.

As shown in FIG. 8 , the door roller 20 has an arc-shaped cross section, a bearing is provided therein, and a roller shaft 21 assembled to the door connection bracket 31 . .

With the above structure, by inserting the roller shaft 21 of the door roller 20 into the shaft insertion portion 32a of the door roller assembly member 32, the door roller on both sides of each unit door panel 30 (20) can be assembled.

In addition, as shown in FIG. 4 , the remote controller 60 for opening and closing the rear door may include an up button 60a, a down button 60b, and a stop button 60a.

In addition, the remote controller 60 may further include a button for automatically raising the door up to a certain height, or may further include a locking button for preventing the rear door from being opened manually.

Next, the structure of the door guide rail 10 for guiding the movement of the door roller 20 will be described.

The door guide rail 10 is for guiding each unit door panel 30 and the door guide rail 10 provided in a plurality on both sides of the rear door in vertical and horizontal directions.

As shown in FIGS. 1 and 5, the door guide rail 10 includes a vertical portion 10a provided inside the rear of the loading box 100 of the vehicle, and a horizontal portion 10c provided on both sides of the inner upper portion of the loading box. And, it is configured in an approximately “L” shape including a corner portion 10b connecting the vertical portion 10a and the horizontal portion 10c in an arc shape.

In addition, as shown in FIG. 8 , the door guide rail 10 is provided with an arcuate portion 10d corresponding to the arcuate cross section of the door roller 20 .

Also, as shown in Figure 10, the door guide rail 10 is supported by the guide rail frame (F) provided inside the loading box.

With the above structure, the plurality of door rollers 20 move smoothly without departing from the door guide rail 10 .

In addition, the upper front of the vehicle loading box 100 is provided with an ascending limit switch (90a) for stopping the raising of the door, the lower rear is preferably further provided with a lowering limit switch (90b) for stopping the lowering of the door .

Next, the chain drive device of the present invention will be described.

The chain driving device of the present invention, as shown in FIGS. 5 and 6, a driving sprocket 41 provided on both sides of the front upper portion of the loading box, and driven sprockets 42 provided on both sides of the rear upper portion of the loading box, and the A roller chain 46 connecting the drive sprocket 41 and the driven sprocket 42, a drive shaft 43 connecting the pair of drive sprockets 41 to each other, and a center of the drive shaft 43 It is configured to include a provided driving motor (44).

The drive shaft 43 is supported by a bearing 45 and connected to each other by a coupling 47 .

The drive motor 44 is configured as a reduction motor that is directly connected to the drive shaft 43 to rotate the drive shaft 43 forward and reverse.

The drive shaft 43 is connected to each other by couplings 47 on both sides of the drive motor 44 .

Preferably, the driving motor 44 is driven by the vehicle's battery power (DC 12V). Accordingly, there is no need to provide a separate driving source.

In addition, although the pair of driving sprocket 41, the driving shaft 43 and the driving motor 44 are illustrated in FIG. 4 as being provided inside the upper portion of the loading box 100, the driving sprocket 41, the driving shaft (43) and the driving motor 44 may be provided to protrude toward the front from the top of the loading box (100).

And at the front of the loading box 100, as shown in FIG. 11, a driving sprocket receiving portion 41a for accommodating the driving sprocket 41 is provided, and at the rear of the loading box 100, the driven sprocket ( A chain tensioner 42a for accommodating 42 and adjusting the tension of the roller chain 46 is provided.

The driving sprocket receiving portion 41a is supported by spacers 41b provided on both sides.

In addition, the chain tensioner 42a pulls the chain by the bolt (B) and the nut (N) to keep the tension of the chain constant.

In addition, a chain support rail for supporting the roller chain 46 is provided between the driving sprocket receiving portion 41a and the chain tensioner 42a.

The chain support rail, as shown in FIGS. 11 and 12, is provided horizontally along the longitudinal direction of the loading box and is provided horizontally along the longitudinal direction of the loading box and the upper chain support rail 71 for supporting the upper chain. It is configured to include a lower chain support rail 72 for supporting the lower chain.

With the above structure, the rollers 46a of the roller chain 46 can be moved horizontally on the support rail 71 as the upper chain and the support rail 72 as the lower chain.

This prevents sagging in the middle even when the chain length is increased.

In addition, the upper chain support rail 71 and the lower chain support rail 72 are integrally formed with the support frame 70 provided on both sides of the inside of the loading box, as shown in FIG. 12, and the support frame 70 ), the cover 80 is assembled.

With the above structure, it is possible to prevent the roller chain 46 from being exposed to the outside.

Next, a structure for connecting the chain and the rear door (hereinafter simply referred to as 'door') will be described.

The door and the chain are connected to each other by an angle-shaped chain connection bracket 50 as shown in FIGS. 12 and 13 .

The chain connection bracket 50 includes a vertical member 51 seated on the upper side of the roller 46a of the roller chain 46 and a horizontal member 52 assembled to the unit door panel 30 .

In addition, the vertical member 51 has a plurality of slots 51a fitted on the upper rollers 46a of the roller chain 46, and the plurality of slots 51a of the vertical member 51 includes a roller ( 46a), the upper part is formed in an arc shape.

With the above structure, the chain connection bracket 50 can be fitted on the roller 46a of the chain to move together with the roller chain 46 .

In addition, as shown in FIG. 4 , the chain connection bracket 50 is provided on both sides of the uppermost unit door panel 30 and is connected to the roller chain 46 .

Hereinafter, the operation process of the automatic rear door opening and closing device according to the present invention will be described. For convenience, a case in which a delivery driver delivers goods to each home will be described as an example.

After the delivery driver parks the vehicle in a suitable place and presses the door open button of the remote controller while descending from the driver's seat, the driving sprocket 41 rotates counterclockwise by the operation of the driving motor 44 .

Accordingly, the chain also rotates counterclockwise, and the chain connection bracket 50 connected to the chain moves toward the front of the vehicle to raise the door.

When the uppermost unit door panel comes into contact with the upper limit switch 90a provided at the front of the vehicle, the drive motor 44 stops and the door stops moving.

After unloading the necessary items from the loading box, press the door close button.

Then, the chain rotates clockwise, and the chain connection bracket 50 connected to the chain moves toward the rear of the vehicle to lower the door.

When the lowermost unit door panel comes into contact with the lower limit switch 90b provided at the rear lower part of the vehicle, the drive motor 44 stops and the door stops lowering.

Next, the product is delivered after locking the door by pressing the locking button provided in the remote controller 60 .

According to the conventional door opening and closing device, since the operation of opening and closing the door must be repeated countless times each time an article is delivered, the labor intensity of the courier is increased and the possibility of musculoskeletal disorders is high.

In addition, in the case of a narrow alley, it is difficult to secure a space to rotate both doors 270 degrees.

Thereby, there is the inconvenience of finding a large space to open the door, and in this case, the delivery time is further delayed because it moves away from the delivery place.

Because of the above problem, there are cases in which the goods are delivered with the door open. In this case, there is a problem that the goods are likely to be lost.

However, according to the present invention, the delivery driver can open the rear door while descending the driver's seat, and can close the door immediately after unloading the goods to the ground.

That is, since the door can be opened and closed completely automatically, the time required for opening and closing the door can be reduced, and the labor intensity of the goods delivery person can be weakened.

Also, after closing the door, the remote controller locks the door, so there is no risk of lost items.

In the above, preferred embodiments of the present invention have been exemplarily described, and the scope of the present invention is not limited to the specific embodiments described above. Those of ordinary skill in the art to which the present invention pertains will understand that various modifications and changes are possible without departing from the scope of the technical spirit of the present invention.

10: door guide rail 10a: vertical part
10b: corner portion 10c: horizontal portion
10d: arc part 20: door roller (Door Roller)
21: Roller Shaft 30: Unit Door Panel
31: door connection bracket (Bracket)
31a: hinge part 32: door roller assembly member
32a: shaft insert 41: drive sprocket
41a: sprocket receiving portion 41b: spacer (Spacer)
42: driven sprocket 42a: chain tensioner
43: drive shaft 44: drive motor
45: Bearing 46: Roller Chain
46a: Roller 47: Coupling
50: chain connection bracket 51: vertical member
51a: slot 52: horizontal member
60: Remote Controller
70: support frame 71: upper chain support rail
72: lower chain support rail 80: cover (Cover)
90: limit switch (Limit Switch) 100: loading box
110: right rotating member 112: right door locking bar (Locking Bar)
113: right bracket (Bracket) 114: right lever fixing member
115: right locking lever (Locking Lever) 120: left rotating member
122: left door locking bar 123: left bracket
124: left lever fixing member 125: left locking lever
F: Guide Rail Frame
LD: Rear left door RD: Rear right door
SD: side door

Claims (16)

a rear door in which a plurality of unit door panels 30 are connected by a door connection bracket 31 to open and close in an overhead manner; a door roller 20 provided on both sides of the connection portion of the unit door panel 30; The vertical portion 10a provided inside the rear of the loading box 100 of the vehicle, the horizontal portion 10c provided on both sides of the inner upper portion of the loading box, and the vertical portion 10a and the horizontal portion 10c are connected in an arc shape In the rear door opening and closing device of the goods delivery vehicle comprising;
a chain driving device respectively provided under the horizontal portion 10c of the door guide rail 10;
A chain connection bracket (50) provided on both sides of the rear door and connected to the chain,
Further comprising a remote controller (60) for wirelessly driving the chain drive device,
The chain is rotated by the operation of the remote controller 60 to open and close the rear door,
The chain drive device,
A driving sprocket 41 provided on both sides of the front upper part of the loading box,
A driven sprocket 42 provided on both sides of the rear upper part of the loading box,
a roller chain 46 connecting the driving sprocket 41 and the driven sprocket 42;
a drive shaft 43 connecting the pair of drive sprockets 41 to each other;
It is configured to include a drive motor 44 provided in the center of the drive shaft 43,
A chain support rail for supporting the roller chain 46,
an upper chain support rail 71 provided horizontally along the longitudinal direction of the loading box to support the upper chain;
It is provided horizontally along the longitudinal direction of the loading box and is configured to include a lower chain support rail 72 for supporting the lower chain,
The roller 46a of the roller chain 46 moves horizontally on the upper chain support rail 71 and the lower chain support rail 72,
The chain connection bracket 50 connecting the rear door and the chain is an angle shape,
A vertical member 51 that is seated on the upper side of the roller 46a of the roller chain 46,
Includes a horizontal member 52 assembled to the unit door panel (30),
The vertical member 51 is provided with a plurality of slots 51a fitted on the upper rollers 46a of the roller chain 46,
The plurality of slots (51a) of the vertical member (51), the upper portion is formed in an arc shape to correspond to the shape of the roller (46a),
The chain connection bracket 50 is provided on both sides of the uppermost unit door panel 30 and is connected to the chain,
The chain connection bracket (50) is fitted on the upper part of the roller (46a) of the chain and moves like the roller chain (46). The method of claim 1,
The door guide rail (10) has an arcuate portion (10d) corresponding to the arc-shaped cross section of the door roller (20). The method of claim 1,
A rear door automatic opening and closing device of a goods delivery vehicle, characterized in that door roller assembly members (32) are assembled on both sides of the unit door panel (30). 4. The method of claim 3,
A rear door automatic opening and closing device of a goods delivery vehicle, characterized in that the door roller assembly member (32) is provided with a shaft insertion part (32a) into which the roller shaft (21) of the door roller (20) is inserted. The method of claim 1,
Each of the unit door panels 30 is provided with a convex portion 30a at the upper portion and a concave portion 30b at the lower portion,
In a straight section, the convex portion (30a) and the concave portion (30b) are mated to each other, and in a corner section, the convex portion (30a) and the adjacent concave portion (30b) are separated from each other. Automatic rear door opening and closing device. delete The method of claim 1,
The drive motor (44) is a reduction motor that is directly connected to the drive shaft (43) to rotate the drive shaft (43) forward and reverse. The method of claim 1,
A driving sprocket receiving part 41a for accommodating the driving sprocket 41 is provided at the front of the loading box 100,
Automatic opening and closing device for the rear door of a goods delivery vehicle, characterized in that a chain tensioner (42a) for accommodating the driven sprocket (42) and adjusting the tension of the roller chain (46) is provided at the rear of the loading box (100) . delete delete The method of claim 1,
The upper chain support rail 71 and lower chain support rail 72 are integrally formed with the support frame 70 provided on both sides of the inside of the loading box,
Automatic opening and closing device for the rear door of the goods delivery vehicle, characterized in that the cover (80) is assembled on the inside of the support frame (70). delete delete delete delete The method of claim 1,
The rear door automatic opening and closing device of the goods delivery vehicle, characterized in that the limit switch (90) for limiting the movement of the door is further provided in the upper front and lower rear of the vehicle loading box (100).

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