KR101209794B1

KR101209794B1 - Apparatus for automatic opening and closing luggage doors of bus

Info

Publication number: KR101209794B1
Application number: KR1020100111128A
Authority: KR
Inventors: 이승재; 전병일
Original assignee: 현대자동차주식회사; 동아특수정밀 주식회사; 기아자동차주식회사
Priority date: 2010-11-09
Filing date: 2010-11-09
Publication date: 2012-12-10
Also published as: KR20120049724A

Abstract

The present invention automatically opens and closes the luggage doors installed on both sides of the side panel by the operation of the door opening and closing switch in the room at the same time, automatic luggage door opening and closing device for the bus can solve the inconvenience caused by the existing manual operation It is about.
The present invention is a rotating shaft rotatably installed on the side panel inside the luggage room; A hinge arm having an upper end coupled to the rotary shaft and a lower end hinged to the luggage door to open and close the luggage door; A pinion gear rotatably installed at one side of the rotation shaft; A rack gear is formed on the piston rod so as to be engaged with the pinion gear, and includes a door opening and closing cylinder for rotating the pinion gear. It provides an automatic opening and closing device of the luggage door for the bus, characterized in that the automatic opening and closing of the luggage door at the same time.

Description

Automatic opening and closing luggage doors of buses {Apparatus for automatic opening and closing luggage doors of bus}

The present invention relates to an automatic opening and closing device of a luggage door for a bus, and more particularly, to automatically open and close a luggage door mounted on a side panel of a bus to provide convenience to a driver. It relates to a switchgear.

On the side panel side of the bus, a number of luggage doors (luggage doors) for storing passengers' luggage are provided to facilitate the travel of passengers carrying luggage.

1 is a side view illustrating the configuration and operation of the luggage door according to the prior art.

The luggage door 1 is installed on both sides of the side panel 2 of the bus so as to be rotatable in the vertical direction by the hinge 3, so that the user rotates the luggage door 1 in the vertical direction, such as luggage You can open and close your luggage room.

A conventional gas cylinder 4 which provides a repelling force between the top of the rear surface of the luggage door 1 and the bottom of the inner side panel of the luggage room is hinged by the connecting bracket 5, thereby providing a luggage door 1 The damping function can be prevented when the luggage door 1 is kept open or the luggage door 1 is closed, thereby preventing an impact on the vehicle body by the luggage door 1.

In addition, a normal unlocking knob 6 is installed at the lower center of the luggage door 1, and pulling the unlocking knob 6 may release the lock of the luggage door 1. .

Looking at the opening and closing operation of the luggage door (1) as follows.

First, in order to open the luggage door 1, when the user pulls the unlocking knob 6, the luggage door 1 is unlocked, and when the luggage door 1 is lifted, the luggage door 1 ) Is opened about the hinge 3 by the hydraulic pressure of the gas cylinder.

On the contrary, in order to close the luggage door 1, when the luggage door 1 is pushed down, the luggage door 1 is smoothly rotated about the hinge 3 while being damped by the repulsive force of the gas cylinder 4. It is closed and locked to the vehicle body by the locking device.

However, the opening and closing operation of the luggage door 1 is made by a user's manual operation, and the luggage door 1 provided on both sides of the side panel 2 is opened and closed separately, so that the user can In order to open and close the door 1, there was an inconvenience of pulling up or pressing down the handle 6 for unlocking each luggage door 1.

The present invention has been invented in view of the above, and the driver automatically opens and closes the luggage doors installed on both sides of the side panel at the same time by operating the door open / close switch, thereby eliminating inconvenience caused by the existing manual operation. It is an object of the present invention to provide a luggage door automatic opening and closing device for a bus.

The present invention to achieve the above object is a rotation shaft rotatably installed on the side panel inside the luggage room; A hinge arm having an upper end coupled to the rotary shaft and a lower end hinged to the luggage door to open and close the luggage door; A pinion gear rotatably installed at one side of the rotation shaft; A rack gear is formed on the piston rod so as to be engaged with the pinion gear, and includes a door opening and closing cylinder for rotating the pinion gear, the driver being mounted on both sides of the side panel of the vehicle through the operation of an opening and closing switch installed in the driver's seat It provides an automatic opening and closing device of the luggage door for the bus, characterized in that the automatic opening and closing of the luggage door at the same time.

In particular, the upper end is hinged to the side panel inside the luggage room, the lower end is hinged to the luggage door, further comprises a guide arm for guiding opening and closing operation of the luggage door, the luggage door is a hinge Supported by the arm and the guide arm is characterized in that the opening and closing while maintaining the upright position.

The hinge arm is rotatably hinged to one end of the hinge arm by a first gas cylinder fixing bracket, and the other end is hinged to the side panel of the luggage room by a second gas cylinder fixing bracket. The gas cylinder is characterized in that the opening and closing of the luggage door more smoothly.

The door opening and closing cylinder has a first cylinder control valve connected to one side of the door opening and closing cylinder by a first air supply line, and a second cylinder control valve connected to the other side of the door opening and closing cylinder by a second air supply line. It is characterized in that the air is supplied from the air tank in accordance with the operation of the opening and closing switch through the cylinder control valve.

The door opening / closing cylinder is connected to an emergency valve having a manual switching lever to switch the air supply from automatic to manual, and when the luggage door is opened for a long time, the manual switching lever of the emergency valve is operated to automatically operate the automatic air supply. Characterized in switching to the air supply.

Advantages of the automatic luggage door opening and closing device for a bus according to the present invention are as follows.

1. When the driver sits in the driver's seat and operates only the opening / closing switch, the luggage doors on both sides of the side panel are automatically opened and closed at the same time. The inconvenience of opening or closing the luggage door manually by pulling can be eliminated.

For example, the driver does not have to open the luggage door by turning a key when it rains or snows, or open and close the luggage doors mounted on the left and right side panels separately. Can be.

2. As the luggage door is operated by the gas pressure of the door opening cylinder and the gas cylinder, the luggage door collides with the vehicle body by the excessive force applied to the luggage door when the driver closes the luggage door manually. It is possible to prevent deformation of the generated luggage door.

1 is a side view illustrating the configuration and operation of the luggage door according to the prior art.
2 is a conceptual diagram illustrating a connection relationship between a cylinder control valve and a door opening and closing cylinder according to the present invention.
3 is an operating circuit diagram showing the configuration of the first and second cylinder control valve and the air flow in FIG.
Figure 4 is an exploded view showing the automatic opening and closing device of the luggage door according to an embodiment of the present invention.
5 is an operating state diagram of the automatic switchgear in FIG.
FIG. 6 is a front view of FIG. 5 viewed from the inside of the luggage door. FIG.
7 is a perspective view showing a state in which the automatic opening and closing device of the luggage door according to an embodiment of the present invention is mounted on the actual vehicle.
8 is an exploded view of the door opening and closing cylinder.
9 is an assembly view of the door opening and closing cylinder.
10 is an exploded view of the rotating shaft, pinion gear and hinge arm.
FIG. 11 is an assembly view of FIG. 10.
12 is an operating state diagram showing the opening and closing operation of the luggage door in FIG.

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

2 is a conceptual view illustrating a connection relationship between a cylinder control valve and a door opening / closing cylinder according to the present invention, and FIG. 3 is an operation circuit diagram showing a configuration and first air flow of the first and second cylinder control valves in FIG. 2. .

The present invention relates to a bus luggage door 10 automatic opening and closing device for improving the convenience of the user by automatically opening and closing the luggage door 10 installed on the side panel of a large vehicle, such as a bus.

According to the present invention, the luggage door opening and closing switch is installed around the driver's seat of the bus so that the luggage door 10 can be opened and closed automatically by easily operating the opening and closing switch while the driver is sitting in the driver's seat.

Here, the opening and closing switch may have the same configuration as a switch for automatically opening and closing the passenger access door provided in the bus so that passengers can enter and exit, but the opening and closing switch to open and close the luggage door 10 automatically To be arranged around the driver's seat.

An electronic control unit (ECU) provided in the vehicle for controlling the luggage door automatic opening and closing device receives a signal from an opening / closing switch to control the following cylinder control valve 11, thereby allowing the pneumatic door opening and closing cylinder 16 to be described later. By sending air to the luggage door 10 can be opened and closed automatically.

The cylinder control valve 11 is installed in a connecting pipe connecting the door opening and closing cylinder 16 and the air tank, and can supply air to the door opening and closing cylinder 16 from the air tank according to the operation of the opening and closing switch. .

The cylinder control valve 11 is a combination of the first cylinder control valve 12 and the second cylinder control valve 13, the first cylinder control valve 12 is a three-way of the normal close type (Normal Close type) It is a magnetic valve (3way magnetic valve), the second cylinder control valve 13 is a three-way magnetic valve of the normal open type (Normal Open type).

The first cylinder control valve 12 is connected to one side of the door opening and closing cylinder 16 by the first air supply line 14, the second cylinder control valve 13 is the second air supply line 15 It is connected to the other side of the door opening and closing cylinder 16 by the first and second cylinder control valves (12, 13) by changing the flow path in accordance with the on / off operation of the opening and closing switch to open the air cylinder ( 16, the luggage door 10 may be opened and closed by controlling the forward and backward operation of the door opening / closing cylinder 16.

At this time, the first and second cylinder control valve (12, 13) is connected to the air tank side S (Supply; air supply) side, C (Cylinder) side connected to the cylinder side, E (connected to the exhaust side) Holes are formed in the Exhaust side direction, and the first and second cylinder control valves 12 and 13 are actuated according to the on / off operation of the on / off switch so that the flow path of the SC (air supply side) or CE (air exhaust side) To form.

For example, when the on / off switch is turned on, the first and second cylinder control valves 12 and 13 are energized so that the SC flow path of the first cylinder control valve 12 is connected, and the second cylinder control valve 13 is connected. When the CE flow path of the air is connected, the air flows into the door opening and closing cylinder 16 through the SC flow path and the first air supply line 14 of the first cylinder control valve 12 in the air tank, the door opening and closing The cylinder 16 is discharged to the atmosphere through the CE flow path of the second air supply line 15 and the second cylinder control valve 13, at this time for the door opening and closing by the air pressure in the door opening and closing cylinder 16 The piston rod 16b may move forward in the cylinder 16 to open the luggage door 10.

On the contrary, when the on / off switch is turned off, the power supply of the first and second cylinder control valves 12 and 13 is turned off to connect the SC flow path of the second cylinder control valve 13 to the first cylinder control valve 12. When the CE flow path of the air is connected, the air is introduced into the door opening and closing cylinder 16 through the SC flow path and the second air supply line 15 of the second cylinder control valve 13 in the air tank, The cylinder 16 is discharged to the atmosphere through the CE flow path of the first air supply line 14 and the first cylinder control valve 12, the door opening and closing cylinder by the air pressure inside the door opening and closing cylinder 16 The piston rod 16b is reversely acted on the 16 so that the luggage door 10 can be closed.

S side of the first and second cylinder control valve (12, 13) is connected to the emergency valve 18 by a connecting line 17, the check valve 42 is connected to the inlet side of the emergency valve (18) Prevent backflow.

The emergency valve 18 is installed in the connection line 17 connecting the air tank and the cylinder control valve 11, and converts the luggage door 10 from an automatic to a manual position or vice versa. The lever 19 which can be provided is provided.

The reason why the lever 19 is provided in the emergency valve 18 will be explained. When the luggage door 10 is kept open for a long time, the cylinder control valve 11 is applied with a long time to discharge the battery of the vehicle. Since there is a possibility that the luggage door 10 needs to be opened for a long time, the emergency valve (in the state in which the luggage door 10 is closed, that is, the power of the cylinder control valve 11 is turned off) By switching the lever 19 of 18) from automatic to manual and then manually opening the luggage door 10, the risk of battery discharge can be prevented in advance.

Here, when the door is opened, as the cylinder control valve 11 is continuously energized, the temperature of the cylinder control valve 11 is increased, but since the air of the cylinder control valve 11 is kept saturated at a constant temperature, the cylinder There is no abnormality in the control valve 11.

4 is an exploded view showing the automatic opening and closing device of the luggage door according to an embodiment of the present invention, Figure 5 is an operating state diagram of the automatic opening and closing device in Figure 4, Figure 6 is a view from the inside of the luggage door 5 is a front view.

In addition, Figure 7 is a perspective view showing a state in which the automatic opening and closing device of the luggage door 10 according to an embodiment of the present invention is mounted on the actual vehicle.

8 is an exploded view of the door opening and closing cylinder, FIG. 9 is an assembly view of the door opening and closing cylinder, FIG. 10 is an exploded view of the rotating shaft 21, the pinion gear 20 and the hinge arm 22, and FIG. 11. Is an assembly view of FIG. 10.

The door opening and closing cylinder 16 is a pneumatic cylinder, and includes a cylinder body 16a having an air receiving space therein, and a piston rod 16b for entering and exiting the cylinder body 16a by air pressure. In addition, the door opening and closing cylinder 16 receives air from the air tank through the cylinder control valve 11, so that the piston rod 16b is moved back and forth in the cylinder body 16a by the air pressure.

A rack gear 16c (rack gear) is integrally formed on the front upper portion of the piston rod 16b, and a pinion gear 20 is engaged with the upper portion of the rack gear 16c.

The rack gear 16c has a linear structure and is engaged with the circular pinion gear 20 in a tangential direction so that the rack gear 16c is operated by the door opening / closing cylinder 16 in the vehicle body width direction ( Forward and backward in the lateral direction), the pinion gear 20 rotates.

In other words, the linear motion of the rack gear 16c is converted into the circular motion by the pinion gear 20.

A circular center hole is formed in the center of the pinion gear 20, and the uneven portion 20a and the recess 20b are alternately formed along the inner circumferential surface of the center hole (see FIG. 10).

In FIG. 10, the uneven parts 20a and the uneven parts 20b are alternately formed along the inner circumferential surface of the pinion gear 20 to transmit the same rotational force to the rotating shaft 21.

The rotation shaft 21 is inserted through the center hole of the pinion gear 20, and at one end of the rotation shaft 21, the uneven portion 21a and the recess 21b are alternately formed along the circumferential direction, so that the pinion gear Engaged in engagement with the concave-convex portion 20a and the concave groove 20b formed on the inner circumferential surface of the 20.

Accordingly, when the pinion gear 20 rotates, the rotation shaft 21 also rotates at the same angle and rotation speed as the pinion gear 20.

Two hinge arms 22 are coupled to the rotary shaft 21, and an upper end of the hinge arm 22 is coupled to the rotary shaft 21 by a fastening plate, and a lower end of the hinge arm 22 is fixed to the hinge arm 22. The bracket 24 is hinged to the luggage door.

The fastening plate is composed of a first fastening plate 23a integrally formed at the upper end of the hinge arm 22 and a second fastening plate 23b coupled to face the first fastening plate 23a.

Semicircular grooves are formed in the centers of the first fastening plate 23a and the second fastening plate 23b, and a rotation shaft 21 is inserted between the grooves, and the first fastening plate 23a and the second fastening plate are inserted. When the plate 23b is fastened by a fastening means such as a screw in a state where the rotating shaft 21 is butted between the two, the hinge arm 22 rotates at the same angle with the rotating shaft 21.

Both ends of the rotating shaft 21 are coupled to the upper side of the left / right side panel 27 of the luggage room 25 by the rotating shaft fixing bracket 29, and the end of the rotating shaft 21 is connected to the rotating shaft fixing bracket 29. It is rotatably supported by the installed ball bearing 30.

In addition, two guide arms 31 are rotatably mounted in the middle of the left / right side panel 27 of the luggage room 25 by a guide arm fixing bracket, and an upper end of the guide arm 31 is formed in a first manner. The guide arm fixing bracket 32 is hinged to the left and right side panels 27 of the luggage room 25, and the lower end of the guide arm 31 is connected to the luggage door 10 by a second guide arm fixing bracket ( 33) is hinged.

Here, the lower end of the hinge arm 22 is coupled to the middle left and right sides of the rear surface of the luggage door 10 by the hinge arm fixing bracket 24, and the lower end of the guide arm 31 is the second guide arm fixing bracket By 33 are respectively coupled to the lower left and right sides of the rear surface of the luggage door (10).

Accordingly, while the hinge arm 22 rotates about the rotation shaft 21, the middle portion of the luggage door 10 is pushed outward in the vehicle body, and the guide arm 31 is centered on the upper end of the guide arm 31. By supporting the lower end of the luggage door 10 while rotating, the luggage door 10 is opened to the outside of the vehicle body while maintaining the upright position, and then the rotation of the hinge arm 22 and the guide arm 31 is completed. The base door 10 is lifted by the hinge arm 22 and the guide arm 31 and comes closer to the vehicle body and stops.

At this time, the hinge arm 22 is formed of a hook-type bar structure, for example, the inner angle bent about 70 to 80 degrees, the luggage door 10 is each of the two hinge arms 22 and the guide arm 31. By opening and closing in a standing state while being supported by four points, the luggage door 10 can be opened without interference even in a narrow parking space by minimizing the opening trajectory of the luggage door 10.

When the gas cylinder 34 is mounted on the left / right side panels 27 of the luggage room 25 to attenuate excessive closing force of the luggage door 10 and the luggage door 10 is completely opened. Functions to maintain the open state of the luggage door (10).

The gas cylinder 34 is composed of a cylinder body 34a in which gas is stored therein, and a piston rod 34b having one end slidably coupled to the inside of the cylinder body 34a, and an end of the cylinder body 34a. Is connected to the upper portion of the hinge arm 22 by the first gas cylinder fixing bracket 35, the end of the piston rod 34b is fixed to the second gas cylinder fixing bracket on the upper panel 26 of the luggage room 25 It is hinged by 36.

At this time, the first gas cylinder fixing bracket 35 is installed on the upper portion of the hinge arm 22 apart from the rotation shaft 21 at a predetermined distance, and has a constant rotation radius around the rotation shaft 21 and the hinge arm 22. It can be circularly integrated with and converts the linear motion of the gas cylinder 34 into the circular motion.

The gas cylinder 34 has a characteristic that the piston rod 34b always protrudes outward from the cylinder body 34a by the pressure of the gas, so that the gas cylinder 34 cooperates with the operating force of the door opening / closing cylinder 16. When the door 10 is opened, the luggage door 10 is opened in addition to the rotational force of the hinge arm 22, and when the luggage door 10 is fully opened, the luggage door 10 is supported in an open state. When the luggage door 10 is closed, the excessive closing force of the luggage door 10 is attenuated.

The door opening and closing cylinder 16 is fixed to the upper panel of the luggage room 25 by a cylinder fixing bracket 39.

The luggage room 25 has a four-sided box structure by the top panel 26, the left and right side panels 27, and the bottom panel 28, and the front and rear sides are opened and closed by the luggage door 10. It is formed inside the vehicle body and can store passenger's luggage and the like therein.

Mounting portion 37 is integrally formed at the front end of the main body of the door opening / closing cylinder 16, and a bolt penetrates through three through holes formed in the mounting portion 37, so that the door opening / closing cylinder 16 is It is fastened to the cylinder fixing bracket 39 by the mounting portion 37.

A guide groove 38 is formed in the middle of the mounting portion 37 to guide the piston rod 16b of the door opening and closing cylinder 16 to move forward and backward.

The cylinder fixing bracket 39 has an upper surface member 39a fastened to the upper panel 26 of the luggage room 25, a vertical member 39b fastened to one side of the mounting portion 37, and a door opening and closing. It consists of the horizontal member 39c penetrated by the rack gear 16c of the dragon cylinder 16. As shown in FIG.

A circular first through hole is formed in the vertical member 39b, and the rotation shaft 21 penetrates through the first through hole.

A circular second through hole is formed in the horizontal member 39c, and the rack gear 16c enters and exits through the second through hole.

Looking at the operating state of the automatic opening and closing of the luggage door 10 according to the present invention by such a configuration as follows.

12 is an operating state diagram showing the opening and closing operation of the luggage door in FIG.

The driver places the on / off switch installed around the driver's seat in order to open the luggage door 10.

When the on / off switch is turned on, a current is applied to the cylinder control valve 11 so that air is supplied from the air tank to the door opening / closing cylinder 16 through the cylinder control valve 11, and the door opening / closing cylinder 16 is closed. The rack gear 16c of the door opening / closing cylinder 16 advances by air pressure.

When the rack gear 16c moves forward in the vehicle body outward direction, the pinion gear 20 engaged with the rack gear 16c rotates while the rotation shaft 21 also rotates together.

Subsequently, the hinge arm 22 coupled to the rotation shaft 21 rotates together with the rotation shaft 21, and the luggage door 10 coupled to the lower end of the hinge arm 22 is lifted while pushing toward the outside of the vehicle body. Lose.

At this time, the lower end of the hinge arm 22 and the guide arm 31 coupled to both ends of the middle part of the luggage door 10 rotates while supporting the luggage door 10 in an upright position.

In addition, one end of the gas cylinder 34 is connected to the upper portion of the hinge arm 22 by the first gas cylinder fixing bracket 35 so that the linear movement of the gas cylinder 34 is rotated by the hinge arm 22. Switching increases the rotational force of the hinge arm 22 and allows it to operate smoothly.

In other words, the luggage door 10 is opened while the hinge arm 22 is rotated by the pressure of the door opening / closing cylinder 16 and the gas cylinder 34.

On the contrary, when the driver turns off the opening / closing switch to close the luggage door 10, the flow path is changed by the cylinder control valve 11 so that the rack gear 16c of the door opening / closing cylinder 16 moves backward in the vehicle body. And the pinion gear 20 meshed with the rack gear 16c rotates in reverse.

As the rotating shaft 21 coupled to the center of the pinion gear 20 rotates, the hinge arm 22 coupled to the rotating shaft 21 also rotates together with the rotating shaft 21 and is coupled to the lower end of the hinge arm 22. The luggage door 10 moves downward to close the opening of the luggage room 25.

Here, since the piston rod 34b of the gas cylinder 34 has a characteristic of always protruding from the cylinder body 34a by the pressure of the gas stored in the gas cylinder 34, the luggage door 10 is lowered. When moving in the direction, the gas cylinder 34 operates in the opposite direction to the direction in which the hinge arm 22 rotates, thereby attenuating the closing force of the luggage door 10 by the repulsive force of the gas cylinder 34.

Therefore, according to the present invention, when the driver sits in the driver's seat and operates only the opening / closing switch, the luggage door 10 mounted on both sides of the side panel is automatically opened and closed at the same time, so that the driver directly goes out of the vehicle and separates the luggage door 10 separately. Pulling the unlocking handle mounted on the) can eliminate the inconvenience, such as opening or closing the luggage door 10 manually.

For example, the driver does not need to open the luggage door 10 by turning a key when it is raining or heavy snow, or individually open and close the luggage door 10 mounted on the left and right sides of the side panel. It can provide convenience to the driver.

In addition, the luggage door 10 is operated by the gas pressure of the door opening and closing cylinder 16 and the gas cylinder 34, so that when the driver manually closes the luggage door 10, the luggage door 10 is opened. Deformation of the luggage door 10 generated as the luggage door 10 collides with the vehicle body by the excessive force applied can be prevented.

10: luggage door 11: cylinder control valve
12: first cylinder control valve 13: second cylinder control valve
14: first air supply line 15; Second air supply line
16: cylinder for opening and closing the door 16a: cylinder body
16b: Piston Rod 16c: Rack Gear
17 connection line 18 emergency valve
19: lever 20: pinion gear
20a: uneven portion 20b: uneven portion
21: rotating shaft 21a: uneven portion
21b: recess 22: hinge arm
23a: first conclusion plate 23b: second conclusion plate
24: hinge arm fixing bracket 25: luggage room
26: top panel 27: side panel
28: lower panel 29: rotating shaft fixing bracket
30: ball bearing 31: guide arm
32: first guide arm fixing bracket 33: second guide arm fixing bracket
34 gas cylinder 34a cylinder body
34b: piston rod 35: first gas cylinder fixing bracket
36: second gas cylinder fixing bracket
37: mounting portion 38: guide groove
39: cylinder fixing bracket 42: check valve

Claims

A rotating shaft 21 rotatably installed on the side panel 27 in the luggage room 25;
A hinge arm 22 having an upper end coupled to the rotation shaft 21 and a lower end hinged to the luggage door 10 to open and close the luggage door 10;
A pinion gear 20 rotatably installed at one side of the rotation shaft 21;
A rack gear (16c) is formed on the piston rod (16b) to be engaged with the pinion gear 20, the door opening and closing cylinder (16) for rotating the pinion gear (20);
Including,
The upper end is hinged to the side panel 27 inside the luggage room 25, the lower end is hinged to the luggage door 10, the guide arm for guiding opening and closing operation of the luggage door (10) 31);
Comprising a cylinder body 34a and a piston rod 34b, the end of the cylinder body 34a is connected to the upper portion of the hinge arm 22 by a first gas cylinder fixing bracket 35, and the piston rod ( 34b) has a gas cylinder 34 which is hinged by the second gas cylinder fixing bracket 36 to the top panel 26 of the luggage room 25;
Automatic opening and closing device of the luggage door for a bus, characterized in that it further comprises a.

delete

The method according to claim 1,
The door opening / closing cylinder (16) includes a first cylinder control valve (12) connected to one side of the door opening / closing cylinder by the first air supply line (14), and a door opening / closing by the second air supply line (15). Automatic operation of a luggage door for a bus, characterized in that air is supplied from the air tank according to the operation of the on / off switch through the cylinder control valve 11 having the second cylinder control valve 13 connected to the other side of the cylinder 16. Switchgear.

The method according to claim 1,
The door opening / closing cylinder 16 is connected to an emergency valve 18 having a manual switching lever 19 for automatically switching the air supply from manual to an emergency valve when the luggage door 10 is opened for a long time. An automatic opening and closing device for a luggage door for a bus, characterized by switching from automatic air supply to manual air supply by operating the manual switching lever 19 of (18).