JPH0214981A - Trank lid opening/closing device - Google Patents

Abstract

PURPOSE:To improve safety in opening/closing a trank lid by providing a pressure reducing mechanism for reducing the trank lid closing speed in a circuit for closing the trank lid. CONSTITUTION:A flow path change-over section 22 for operatively changing over an air flow path is provided between air cylinders 8a, 8b for opening/ closing a trank lid and an air tank 21. A flow path changeover valve 22 is provided with ports 22a-22e, and the first port 22a of said valve 22 is connected to an air tank 21 through an air filter 23, emergency exhaust valve 24, etc. A speed controller 25 for adjusting the opening speed of the lid and an exhaust pipe 26 are connected respectively to the second and third ports 22b, 22c of said valve 22. The tip sides of the respective cylinders 8a, 8b are connected respectively to the port 22e through a flow path change-over valve 30 for releasing lock and a speed controller 31 for adjusting the lid 3 closing speed sequentially.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a trunk lid for opening and closing a lid that closes a side opening of a trunk room formed on the side of a vehicle body such as a bus. Regarding switchgear.

(Prior Art) Generally, a vehicle such as a bus has a trunk room for storing luggage in the lower part of the vehicle body. The side opening of this trunk compartment is closed by a lid so that it can be opened and closed.

Incidentally, this type of trunk lid has conventionally been opened and closed manually. Therefore,
When opening and closing the trunk lid, for example, a passenger or the like must always do so from the trunk's installation position outside the vehicle body. Also, if the area of the side opening of the trunk compartment is large, the weight of the trunk lid will be large.
There was a problem in that opening and closing the trunk lid was troublesome.

Furthermore, one end of each of the upper and lower support arms forming parallel links on both sides of the trunk lid is rotatably attached to the trunk lid, and the other end of each of these support arms is attached to the vehicle body side. It is rotatably attached to a bracket, etc., and when opening and closing the trunk lid, each support arm is rotated upward and downward around the pivot point on the vehicle body, allowing the trunk lid to be moved upward and downward. A so-called swing-type trunk lid support device is known. However, in the case of a trunk lid supported by this swing-type support device, the weight of the trunk lid is affected by the weight of the trunk lid during the closing operation of moving the trunk lid from the upper open position to the lower closed position. Therefore, as the trunk lid moves downward from its uppermost fully open position, the closing operation speed of the trunk lid increases, which poses a safety problem. Therefore, in the conventional structure, there was a problem in that it was necessary to separately install a damper or the like to suppress the closing operation speed of the trunk lid when the trunk lid was closed.

(Problem to be Solved by the Invention) The lid of the trunk compartment formed on the side of the vehicle body of a vehicle such as a bus has conventionally been opened and closed manually. However, this work must be carried out at the trunk installation location outside the vehicle body, and in the case of a heavy trunk lid, opening and closing the trunk lid becomes troublesome. Furthermore, in the case of a swing-type trunk lid, the closing operation speed of the trunk lid increases as the trunk lid moves downward from the fully open position at the top end, which poses a safety problem. However, there is a problem in that it is necessary to separately install a damper or the like to suppress the closing speed of the trunk lid when the trunk lid is closed.

This invention has been made in view of the above-mentioned circumstances, and provides a trunk lid opening/closing device that can facilitate the opening/closing operation of the trunk lid and improve safety during the opening/closing operation of the trunk lid. The purpose is to

[Structure of the Invention] (Means for Solving the Problems) The present invention provides an actuator for opening and closing a lid that closes a side opening of a trunk room formed in a vehicle body, and connects this actuator to a supply source of working fluid. A flow path switching valve is provided for switching the flow path of the working fluid between the lid opening circuit and the lid closing circuit, and the lid closing operation speed is reduced in the lid closing circuit. It is equipped with a pressure reducing mechanism.

(Function) By automatically opening and closing the lid in accordance with the switching operation of the flow path switching valve, the opening and closing operations of the lid are facilitated, and when the lid is closed, the flow path of the working fluid is closed by the flow path switching valve. By switching to the closing circuit of the lid and reducing the fluid pressure of the working fluid in the lid closing circuit using a pressure reduction mechanism, the lid closing operation speed is reduced and safety during lid closing operation is improved. It was designed to achieve this.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a trunk lid opening/closing device for opening and closing a lid 3 that closes a side opening of a trunk room 2 formed on the lower side of a vehicle body 1 of a vehicle such as a bus, as shown in FIGS. 2 and 3. This shows the schematic configuration of the main parts. In this case, parallel links are formed on both sides of the trunk lid 3.

One end of each of the lower pair of support arms 4.5 is rotatably mounted. The other ends of these support arms 4 and 5 are attached to the vehicle body 1.
It is rotatably attached to the side support brackets 6, 7, etc. When opening and closing the trunk lid 3, each support arm 4.5 is connected to a pivot point 01*0 on the vehicle body 1 side.
A swing-type support device for the trunk lid 3 is formed which moves the trunk lid 3 upward and downward by rotating the trunk lid 3 about the shaft 2 in the upward and downward directions.

Furthermore, 8a and 8b are a pair of air cylinders (actuators) that open and close the trunk lid 3. These air cylinders 8a and 8b are arranged on both sides of the trunk room 2, respectively.

In this case, the base end portions of the air cylinders 8a, 8b are rotatably supported by a support bracket 9 fixed to a fixed portion at the upper rear side of the trunk room 2.

Further, the distal ends of each of the air cylinders 8a and 8b extend toward the side opening of the trunk 2. A piston rod 10a projects from the tip side of each air cylinder 8a, 8b.

10b (shown in FIG. 6) is connected to the trunk lid 3.
It is rotatably connected to left and right upper support arms 4, 4, respectively.

Furthermore, a handle 11 for manual operation is provided at the lower part of the outer surface of the trunk lid 3, as shown in FIG.

Further, the trunk lid 3 is provided with a locking mechanism 12 that releasably locks the trunk lid 3 in the closed position when the trunk lid 3 is closed. As shown in FIG. 5, this locking mechanism 12 is provided with a rotating member 14 rotatably supported by a rotating shaft 13. This rotating member 14 has three arms 1.
5a, 15b, 15c are protruded, and each of these arms 15a, 15b, 15c has an operating rod 16a,
One end of each of 16b and 16c is connected. These operating rods 16a, 16b.

At each other end of 16c, there is a striker 1 fixed to the vehicle body 1 side.
7... are respectively connected to hooks that are removably locked. In addition, this rotating member 14 always moves each hook to the striker 17 by means of a return spring 18.
is biased in the direction of locking. Further, a lock release air cylinder (lock release actuator) 1 for releasing the lock is connected to this rotating member 14 via an appropriate connection member.
Nine piston rods 20 are connected. As the piston rod 20 of the lock release air cylinder 19 protrudes, the rotating member 14 is rotated in a direction opposite to the urging direction of the return spring 18, and each hook of the locking mechanism 12 is moved by the striker 17... It is designed to be moved in the direction of unlocking the lock.

On the other hand, FIG. 6 shows a control air circuit for the air cylinders 8a and 8b that operate the trunk lid 3 to open and close.

In FIG. 6, 21 is an air tank (working fluid supply source). A compressor (not shown) is connected to the air tank 21, and compressed air is supplied from this compressor.

Further, 22 is an air tank 21 and air cylinders 8a and 8b.
This is a flow path switching valve that switches the air flow path between.

This flow path switching valve 22 has a first valve. Second. 3rd゜4th. Each fifth port 22a, 22b, 22c.

22d and 22e are provided, respectively. The air tank 21 is connected to the first port 22a of the flow path switching valve 22 via an air filter 23, an emergency exhaust valve 24, etc.
are connected. Further, a speed controller 25 for adjusting the speed when the lid 3 is opened is connected to the second port 22b of the flow path switching valve 22, and an exhaust pipe 26 is connected to the third port 22c.

Furthermore, the base ends of the air cylinders ga and 8b are connected to the fourth port 22d through a pressure reducing regulator (pressure reducing mechanism) 27 that reduces the closing operation speed of the lid 3 and a closing circuit switching valve 28, respectively. connected. In this case, one end of a bypass circuit 29 for bypassing the regulator 27 is connected to the closing circuit switching valve 28 . The other end of this bypass circuit 29 is connected between the regulator 27 and the fourth port 22d.

Furthermore, each air cylinder 8 is connected to the fifth port 22e through a flow path switching valve 30 for unlocking and a speed controller 31 for speed adjustment when the lid 3 is closed.
The distal ends of a and 8b are connected to each other. In this case, the lock release flow path switching valve 30 and the fifth port 22
One end of a bypass circuit 32 is connected to e. The other end of this bypass circuit 32 is connected to a flow path switching valve 33 for preventing unlocking when the body is under weight, and a speed controller 31+f.
- Connected to the base end side of one lock release air cylinder through sequential connections.

In addition, the flow path switching valve 22 is in a non-energized state, in an energized state A, and in a energized state B.
Each can be switched to the energized state. In the non-energized state, the first port 22a and the fourth port 22a are connected to each other as shown in FIG. In the state in which the fifth ports 22d and 22e are connected, and in the B energized state, the connection between the first port 22a and the fifth port 22e and the second port In the state in which 22b and the fourth port 22d are connected, and in the A energized state, as shown in FIG. The circuit for opening the lid 3 is shown in FIG. 12 in the Ba electrical state, and the circuit shown in FIGS. 13 and 14 in the A electrical state. A circuit for closing the lid 3 shown in FIG. 1 is formed.

Further, FIG. 8(a) shows the non-energized state of the closing circuit switching valve 28, FIG. 8(b) shows the energized state of the closing circuit switching valve 28, and FIG. 9(a) shows the flow path switching for preventing lock release. valve 33
Figure 1(b) shows the non-energized state of the lock release prevention passage switching valve 33, Figure 1(a) shows the non-energized state of the unlocking passage switching valve 30, and Figure 1(b) shows the non-energized state of the lock release prevention passage switching valve 33. The flow paths in the energized state of the lock release flow path switching valve 30 are shown respectively.

A safety device including a photodetector 34 is disposed inside the trunk 2 near the side opening on the side wall surface. This photodetector 34 is formed by a light emitter 34a and a light receiver 34b which are arranged to face each other in a spaced manner between opposing walls in the trunk compartment 2, and are located on the trunk lid 3.
If the light between the light emitter 34a and the light receiver 34b is interrupted during the closing operation, the flow path switching valve 22 is immediately switched from the Aa energized state to the B energized state, and the lid 3 closing operation is stopped. It has become so.

Further, a first stroke switch 35 is attached to the lock release air cylinder 19. The first stroke switch 35 causes the piston rod 20 of the air cylinder 19 to move a predetermined stroke to unlock the lock mechanism 12 of the lid 3 when air is supplied into the lock release air cylinder 19 from the air tank 21 side. It is set to turn on when the power is turned on.

Furthermore, one air cylinder 8a is provided with a second stroke switch 36. A third stroke switch 37 is attached to each of the other air cylinders 8b. In this case, the second stroke switch 36 is configured such that when air is supplied from the air tank 21 side into the air cylinder 8a through the closing circuit of the lid 3 when the lid 3 is closed, the piston rod 10a of the air cylinder 8a is It is set to be turned on when the second stroke switch 36 moves a predetermined stroke, and the switching operation of the closing circuit switching valve 28 is controlled in accordance with the operation of the second stroke switch 36. Further, the third stroke switch 37 is activated when air is supplied from the air tank 21 side into the air cylinder 8b via the closing circuit of the lid 3 when the lid 3 is closed.
It is set to be turned on when the third stroke switch 37 moves a predetermined stroke, and the power cutoff operation of the photodetector 34 is controlled in accordance with the operation of the third stroke switch 37.

Further, an opening/closing switch 39.39 for the trunk lids 3, 3 is provided around the driver's seat 38 in the vehicle interior, and the trunk lid 3.3 is automatically opened/closed when the opening/closing switch 39.39 is operated. It has become so. Note that manual switches for the trunk lids 3, 3 are provided near the open/close switches 39, 39. This manual switch is normally held in the on state (other than during manual operation), and is turned off when the trunk lids 3, 3 are manually operated.

Next, the operation of the above configuration will be explained.

First, when the opening/closing switch 39 is turned on while the trunk lid 3 is MIKed, the lock release flow path switching valve 30 and the lock release prevention flow path switching valve 33 are first switched to the energized state. Flow path switching valve 22
and the closing circuit switching valve 28 are each maintained in a non-energized state. Therefore, in this state, as shown in FIG.
a, 8b, respectively, and the trunk lid 3
Air is supplied in the direction of closure. Furthermore, since air is supplied to the lock release air cylinder 19 at the same time as the air is supplied in the closing direction of the trunk lid 3, the rotation member 14 is moved as the piston rod 20 of the lock release air cylinder 19 protrudes. The return spring 18 is rotated in a direction opposite to the biasing direction, and each hook of the locking mechanism 12 is moved in the direction of releasing the lock from the striker 17, so that the locking mechanism 12 is unlocked.

Further, as the lock mechanism 12 is unlocked, the first stroke switch 35 of the lock release air cylinder 19 is turned on. As the first stroke switch 35 is turned on, the flow path switching valve 22 changes from the state shown in FIG.
0 are respectively switched to a non-energized state, and in this state, a circuit for opening the lid 3 shown in FIG. 12 is formed.

Therefore, in this case, the air supplied from the air tank 21 side is introduced into the inside of each air cylinder 8a, 8b from the port on the base end side of each air cylinder 8a, 8b, and the air is introduced in the opening direction of the trunk lid 3. Since it is supplied, the air cylinder 8a.

8b, the trunk lid 3 is automatically opened as shown by the phantom line in FIG.

Furthermore, when the opening/closing switch 39 is turned off while the trunk lid 3 is open, the flow path switching valve 22 is first changed from the state shown in FIG. Release prevention flow path switching valve 3
3 are respectively switched to a non-energized state, and in this state, a circuit for closing the lid 3 shown in FIG. 13 is formed. Therefore, in this case, air supplied from the air tank 21 side is introduced into the inside of each air cylinder 8a, 8b from the port on the tip side of each air cylinder 8a, 8b, and air is supplied in the direction of closing the trunk lid 3. be done. In this case, each air cylinder 8 is
Since a pressure reducing regulator 27 is interposed in the air supply passage supplied to the ports on the tip side of a and 8b,
The regulator 27 suppresses the air supply speed, reduces the closing operation speed of the lid 3, and closes the lid 3 relatively slowly.

Note that during the closing operation of the lid 3, the light emitting device 34 of the photodetector 34 placed oppositely near the side opening of the trunk compartment 2
When the light between A and the light receiver 34b is interrupted, the flow path switching valve 22 is immediately switched from the A energized state to the B energized state, and the closing operation of the lid 3 is stopped.

Further, during the closing operation of the lid 3, the third stroke switch 37 is turned on when the piston rod 10b of the air cylinder 8b moves a predetermined stroke. 34
power is cut off.

Furthermore, during the closing operation of the lid 3, when the piston rod 10a of the air cylinder 8a moves a predetermined stroke, the second
The stroke switch 36 is turned on. and,
This second stroke will be. Therefore, in this state, as shown in FIG. 14, each air cylinder 8a is opened from the air tank 21 side.

Air is supplied to each air cylinder 8a in a state in which the regulator 27 in the air supply passage, which is supplied to the port on the distal end side of the air cylinder 8b, is bypassed via a bypass circuit 29.

Since it is supplied to the port on the tip side of the lid 8b, the closing operation speed of the lid 3 is increased just before the lid 3 is closed. Then, at the same time as the lid 3 reaches the closed position, each hook of the locking mechanism 12 of the lid 3 is activated by the striker 17...
The lid 3 is locked in the closed position by the locking mechanism 12.

On the other hand, when the manual switches of the trunk lids 3, 3 are turned off, the flow path switching valve 22, the blocking circuit switching valve 28, the lock release prevention flow path switching valve 33, and the lock release flow path switching valve 30 are activated. Each is operated to be switched to a non-energized state. Therefore, in this case, the manual circuit shown in FIG. 15 is formed, so that the air supplied from the air tank 21 side is maintained in a state where it is introduced to both sides of each piston of each air cylinder 8a, 8b. .

Further, in an emergency, the exhaust valve 24 is manually operated.

In this case, the emergency circuit shown in FIG.
It is maintained in a state where it is exhausted to the outside through the.

Therefore, in the above configuration, the trunk lid 3 is automatically opened and closed in accordance with the switching operation of the flow path switching valve 22, so that the lid 3 can be opened and closed manually.
The opening/closing operation of the lid 3 can be made easier compared to the case where the lid 3 is opened/closed.

Further, when the lid 3 is closed, the flow path switching valve 22 switches the air flow path to the lid 3 closing circuit, and the regulator 27 reduces the fluid pressure of the air in the lid 3 closing circuit. Therefore, the closing operation speed of the lid 3 can be reduced, and the closing operation speed of the lid 3 can be reduced.
Safety during the closing operation can be improved.

Note that this invention is not limited to the above embodiments. For example, in the above embodiment, during the closing operation of the lid 3, the third stroke switch 37 is turned on, and then the second stroke switch 36 is turned on. The second stroke switch 36 may be turned on before the third stroke switch 37 is turned on. Further, in the above embodiment, an air circuit using air as the working fluid for the control circuit of the air cylinders 8a and 8b has been described, but it may also be constituted by a hydraulic circuit. Furthermore, it goes without saying that various other modifications can be made without departing from the gist of the invention.

[Effects of the Invention] According to the present invention, an actuator for opening and closing a lid that closes a side opening of a trunk room formed in a vehicle body is provided, and a working fluid flow path is provided between the actuator and a working fluid supply source. A flow path switching valve is provided for switching between the lid opening circuit and the lid closing circuit, and a pressure reducing mechanism is provided in the lid closing circuit to reduce the speed of the lid closing operation. , it is possible to facilitate the opening and closing operation of the trunk lid, and it is also possible to improve the safety during the opening and closing operation of the trunk lid.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view showing a schematic configuration of the main parts of the trunk lid opening/closing device, Fig. 2 is a perspective view showing the external appearance of the bus, and Fig. 3 is a trunk lid opening/closing device. 4 is a schematic configuration diagram showing the trunk lid locking mechanism, FIG. 5 is a front view showing the configuration of the main parts of the locking mechanism, and FIG. 6 is a trunk lid opening/closing diagram. A schematic configuration diagram showing the control air circuit of the air cylinder for use, FIG. 7(a) shows the flow path in the non-energized state of the flow path switching valve, and FIG. 7(b) shows the flow path in the BR energized state of the flow path switching valve. , FIG. 8(c) is a schematic configuration diagram showing the flow path of the flow path switching valve in the Aail state, FIG. 8(a) is the flow path of the closing circuit switching valve in the non-energized state, and FIG. FIG. 9 (a) is a schematic configuration diagram showing the energized flow paths of the closing circuit switching valve.
) is a schematic configuration diagram showing the flow path of the lock release prevention flow path switching valve in a de-energized state, and FIG. ) is the flow path in the de-energized state of the lock release flow path switching valve, and the same figure (
b) is a schematic configuration diagram showing the flow paths of the lock release flow path switching valve in the energized state, FIG. 11 is a schematic configuration diagram showing the air flow path during the lock release operation, and FIG. 12 is the trunk lid opening operation. FIG. 18 is a schematic diagram showing the air flow path when the trunk lid is closed; FIG. 14 is a schematic diagram showing the air flow path just before the trunk lid closes. FIG. 15 is a schematic diagram showing the air flow path during manual operation of the trunk lid, and FIG. 16 is a schematic diagram showing the air flow path during an emergency. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Trunk room, 3... Trunk lid, 8a, 8b... Air cylinder (actuator), 21... Air tank, 22... Flow path switching valve, 27... Regulator (pressure reduction mechanism). Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] An actuator for opening and closing a lid that closes a side opening of a trunk room formed inside the vehicle body, and a working fluid flow path between the actuator and a working fluid supply source are connected to a circuit for opening the lid and a working fluid flow path between the actuator and a working fluid supply source. A trunk lid opening/closing device comprising: a flow path switching valve that switches between a closing circuit and a pressure reducing mechanism that is interposed in the lid closing circuit and reduces the speed of closing operation of the lid. .