JPS6363878A - Door switchgear for car - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vehicle door opening/closing device that opens a door provided at the entrance of a vehicle such as a large sightseeing bus along an outer wall parallel to the vehicle body. .

[Conventional technology]

Generally, a vehicle door opening/closing device that opens a door provided at an entrance/exit of a vehicle along an outer wall parallel to the vehicle body has a structure shown in FIGS. 5 and 6. That is, the vehicle door opening/closing device 1 includes a drive device 2, a door rotation shaft 3 that rotates and slides up and down by the drive device 2, an arm 5.5 that connects the door rotation shaft 3 and m4, and a door 4. Auxiliary links 9 are pivotally supported on the lower end of the vehicle body 6 and the entry/exit step surface 7 of the vehicle body 6.
The drive device 2 is fixed to the entry/exit step surface 7 of the vehicle body 6 by a lower bracket 10, and the upper end of the door rotating shaft 3 is rotatably supported by an upper bracket 11 fixed to the vehicle body 6. . Further, the door 4 and the vehicle body 6 have a plurality of locking devices 12, 12', 12, 12' and 12', 12' and 12', which engage when the door is closed.
3.13' and 14.14', and a seal rubber 15 is provided around the door 4.

When opening the door from the closed state shown in the figure, first, the drive device 2 lowers the door rotating shaft 3 slightly downward, and the locking devices 12.12', 13.13' for the door 4 and the vehicle body 6,
14.14' is released, and then the door rotation shaft 3 is rotated in the direction of arrow A by the drive device 2, and the door 4 is moved by the arm 5.14'.
5 and the auxiliary link 9, it opens along the outer wall parallel to the vehicle body. Conversely, when closing the door 4, if the door rotation shaft 3 is rotated in the direction of arrow B by the drive device 2, m4
moves in the closing direction, and just before it closes with the vehicle body 6, the drive device 2
to raise the door rotation shaft 3 and lock the locking device 12.12'.
, 13.13', and 14.14' are engaged to lock the door 4 and the vehicle body 6, thereby preventing rattling due to wind pressure, vibration, etc. during driving.

A conventional example of the drive device 2 will be explained with reference to FIG. 7. A cylindrical piston 51 is rotatably and slidably fitted into a cylinder 50, and a piston shaft 52 rotates through the cylindrical piston 51. and is slidably supported. A first elongated hole 55 is formed in the side wall of the cylindrical piston 51, and includes a slanted hole 53 having a large inclination angle with respect to the axial direction, and a sliding hole 54 parallel to the axial direction that communicates with the lower part of the slanted hole 53.
A second long hole 56 parallel to the axial direction is formed.

The positions of the upper and lower ends of this second elongated hole 56 are formed to match the positions of the upper and lower ends of the inclined hole 53 of the first elongated hole 55, and the sliding hole 54 is formed in the second elongated hole. Δ from the lower end of 56
It is formed downward by the length of ST. A fixed roller 5 attached to the cylinder 50 is inserted into the first elongated hole 55.
7 is fitted, and the piston shaft 52 is fitted into the second elongated hole 56.
A shaft roller 59 attached to the shaft is fitted.

To explain its operation, when the door is open, the cylindrical piston 51 is at the solid line position in the figure, and when the door is opened, when air is supplied from below the cylinder 50, the cylindrical piston 51
However, since the fixed roller 57 of the cylinder 50 is fitted into the inclined hole 53 of the elongated hole 55 of the cylindrical piston 51 formed in the cylindrical piston 51, the rotational direction of the cylindrical piston 51 is A force is generated and the cylindrical piston 51 rises while rotating in the direction of arrow B. On the other hand, since the shaft roller 59 attached to the piston shaft 52 is fitted into the second elongated hole 56 of the rotating cylindrical piston 51, the piston shaft 52 rotates without rising and closes the door. . Immediately before the door closes, the fixed roller 57 fits into the sliding hole 54 of the first elongated hole 55, so the cylindrical piston 51 rises, and at this time the shaft roller 59
is engaged with the lower end of the second elongated hole 56, the piston shaft 52 also rises, and the sliding hole 54 rises by the length ΔST, thereby locking the door to the vehicle body.

Furthermore, when the door is opened, air is supplied from above the cylinder 50 and the cylindrical piston 51 descends, and at this time the fixed roller 57 is located within the sliding hole 54 of the first elongated hole 55.
The cylindrical piston 51 descends by the length ΔST of the 1WllI hole 54 to release the lock between the door and the vehicle body, and then the fixed roller 57 fits into the diagonal hole 53 at around 1 of the first elongated hole 55.
The cylindrical piston 51 descends while rotating in the direction of the arrow,
The piston shaft 52 rotates without descending to open the door.

[Problem that the invention seeks to solve]

The above-mentioned conventional opening/closing type door has a problem in that it is very dangerous if a person or object gets caught in the door while it is closed because it is heavy and has a large inertial force. Furthermore, if the door is installed in the center or rear of the vehicle body, there is a problem in that it is difficult for the driver to identify whether or not there has been an entrapment.

Furthermore, when the door begins to open, the door rotating shaft needs to be lowered quickly to release the lock, but since the only force required to lower it is the door's own weight, it is difficult to lower it immediately. .

The present invention solves the above-mentioned problems, and not only makes it possible to quickly unlock the door when the door is opened, but also immediately detects when a person or object is caught in the door while the door is closed. An object of the present invention is to provide a vehicle door opening/closing device capable of reversing the vehicle door opening/closing device.

[Means for solving problems]

For that purpose, the present invention opens and closes the vehicle door! Position a includes a piston shaft connected to a door rotating shaft that opens and closes the door, and a cylinder that forms first, second, and third cylinder chambers by a cylindrical piston and an auxiliary piston fitted to the piston shaft. , a second elongated hole formed in the cylindrical piston and having a first elongated hole inclined with respect to the axial direction and an elongated hole parallel to the axial direction, and a second elongated hole fitted in the first elongated hole and the piston shaft; and a fixed roller fitted into a 20th elongated hole and attached to the cylinder, the third cylinder chamber is constantly supplied with air, and the first or second cylinder chamber is supplied with air. By supplying The device is characterized in that a sensor is provided, and the door is reversed in the opening direction for a certain period of time by the operation of the sensor.

[Effect]

In the present invention, as shown in FIGS. 1 and 2121, for example, when the door starts to open, the thrust of the auxiliary piston 30 acts in addition to the dead weight of the door 34, and during the door closing operation, a person or an object may come between the door and the vehicle body. If the door is caught, a large resistance torque acts on the door rotation shaft 3, and when the door rotation shaft 3 stops,
The door rotation shaft 3 rises with the thrust of F0F+, and the second sensor microswitch 42 turns on, so the solenoid valve 35 is switched, air is supplied to the second cylinder chamber 32, and the cylindrical piston 21 descends. Then, the door rotation axis 3 is reversed in the opening direction,
After a certain period of time, the door rotation shaft 3 will be reversed again in the closing direction.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of the vehicle door opening device of the present invention, FIG. 2 is a diagram for explaining its operation, and FIG. 3 is a perspective view showing an example of sensor arrangement. FIG. 4 is a diagram showing an electric circuit of the present invention.

FIG. 1 shows the state in which the drive device 2 is closed. A cylindrical piston 21 is rotatably and slidably fitted into the cylinder 20 of the drive device 2, and a piston shaft 22 is rotatably and slidably supported through the cylindrical piston 21. As shown in detail in FIG. 2, the side wall of the cylindrical piston 21 is provided with a first elongated hole 2 having a large inclination angle with respect to the axial direction.
3 is formed, and a sliding hole 24 parallel to the axial direction and a II diagonal hole 25 inclined with respect to the axial direction communicating with the lower part thereof.
A second elongated hole 26 is formed.

What are the positions of the upper and lower ends of the first elongated hole 23? 52 long holes 26
The upper and lower ends of the sliding hole 24 are formed so as to be flush with each other, and the oblique hole 25 is formed axially below the lower end of the first elongated hole 23 by a length ΔST. has been done. A fixed roller 27 attached to the cylinder 20 is fitted into the second elongated hole 26, and a shaft roller 29 attached to the bistoyu/shaft 22 is fitted into the first elongated hole 23. There is.

Further, an auxiliary piston 3 is provided at the upper step of the piston shaft 22.
0 is attached, and a cylindrical piston 21 is installed in the cylinder 20.
A first cylinder chamber 31, a second cylinder chamber 32:8, and a third cylinder chamber 33 are formed by the auxiliary piston 30 and the auxiliary piston 30. The first cylinder chamber 31 is connected to the solenoid valve 35 via the speed adjustment valve 34, and the second cylinder chamber 32 is connected to the solenoid valve 35 through the speed adjustment valve 36.
The third cylinder chamber 33 includes a solenoid valve 35 and an emergency cock 37.
The piping is connected between the two and connected so that air is constantly supplied.

Further, the tip of the piston shaft 22 is fixed to the door rotation l1h3, and the lower end of the door rotation shaft 3 is supported by a bearing metal 39 provided on the lower bracket 10.

In addition, the door rotation shaft 3 has a notch 43 as shown in FIG.
A first sensor 41 consisting of a micro switch that detects the rotational position of the cam 40 and a second sensor 42 consisting of a micro switch that detects the raised position of the cam 40 are attached to the lower bracket 10. installed on.

To explain its operation, when the door is open, the cylindrical piston 21 is at the solid line position in FIG. 2, and when the door is closed, air is supplied to the first cylinder chamber 31 by switching the solenoid valve 35, When the air is exhausted from the cylinder 20, the fixed roller 27 of the cylinder 20 is located within the sliding hole 24 of the second elongated hole 26 formed in the cylindrical piston 21.
The cylindrical piston 21 rises with thrust F0. On the other hand, the shaft roller 29 attached to the piston shaft 22 moves within the first elongated hole 23 of the cylindrical piston 21.
is inclined with respect to the axial direction, and since air is supplied to the third cylinder chamber 33 and a thrust force F1 is generated in the auxiliary piston 30, when the cylindrical piston 21 rises, the axial piston 2
2, a rotational component of the thrust F1 of the auxiliary piston 30 is generated, causing the piston shaft 22 and the door rotating shaft 3 to rotate in the direction of arrow B, thereby moving the door 4 in the closing direction. At this time, the contact point of the microswitch 41, which is the first sensor, is
It is pressed against the cam 40 and turned on.

Just before the door rotation shaft 3 rotates and the door 4 closes, the contact point of the microswitch 41 is located in the notch 43 of the cam 40 and turned off, and at the same time, the fixed roller 27 moves into the second elongated hole 2.
At the same time, the shaft roller 29 moves to the first inclined hole 25.
It engages with the lower end of the elongated hole 23. As a result, the first long hole 2
3, but the cylindrical piston 21 rises while rotating slightly, so the piston shaft 22 and the door rotating shaft 3 also do not rotate slightly, so Fo-7+
The door 4 is raised by the thrust of the vehicle body, and the door 4 is raised by the length ΔST of the inclined hole 25 to lock the door 4 to the vehicle body. The role of this inclined hole 25 is to allow the door 4 to rise and rotate at a gentle angle before it comes into contact with the seal rubber 15, since a large lifting force is required after the door 4 comes into contact with the seal rubber 15. .

If a person or object gets caught between the door and the vehicle body during the door opening operation described above, a large resistance torque acts on the door rotation shaft 3, and when the door rotation shaft 3 stops, the door rotation shaft 3 will move between F and -F. It rises due to the thrust, and the micro switch 42 of the second sensor turns on, so the solenoid valve 35 is switched and the second cylinder chamber 32
Air is supplied to the door, the cylindrical piston 21 descends, and the door rotating shaft 3 is reversed in the opening direction.

Furthermore, when the door is opened, the solenoid valve 35 is switched to supply air to the second cylinder chamber 32, and since air is constantly supplied to the third cylinder chamber 33, the thrust of the auxiliary piston 30 pushes the piston shaft 22. Acting in the downward direction, the cylindrical piston 21 quickly begins to descend along the fixed roller 27, and when the piston shaft 22 descends by the length ΔST of the inclined hole 2S of the 20th elongated hole 26, the door and the vehicle body The lock is released, and then the sliding hole 24 of the second elongated hole 26 is inserted into the fixed roller 27.
When the cylindrical piston 21 is fitted, the axial roller 29 of the piston shaft 22 moves within the first elongated hole 23 of the cylindrical piston 21, so as the cylindrical piston 21 descends, the piston shaft 22 rotates in the six directions of arrows, and the door opens. It opens. Note that even if a resistance torque acts on the door rotation shaft 3 during the door opening operation, the door rotation shaft 3 will not rise and will not be reversed.

To explain the above operation using the electric circuit shown in FIG. 4, when the door opening/closing switch 44 is switched to the close side, the micro switch 4
Since the normally closed contact of the micro switch 41 is turned on and the normally closed contact of the microswitch 41 is turned off, the time limit contact 46 of the evening/imagination 45 is turned off and the solenoid 47 is not energized.As a result, the solenoid valve 35 is turned off. air is supplied to the cylinder chamber 31, and the door rotating shaft 3 rotates in the closing direction. When the door is about to open, the lever of the micro switch 41 moves to the cam 4.
0 enters the notch 43 and is turned off. After that, the door rotation shaft 3 rises, the microswitch 42 turns on, and the timer 45 is turned off.
Even if the time limit contact 46 is turned on, the solenoid 47 remains in a non-energized state.

If a person or object gets caught between the door and the vehicle body during the door closing operation, the door rotating shaft 3 will rise and the micro switch 42 will turn on, so the time limit contact 46 of the timer 45 will turn on and the solenoid 47 will be activated. The WILm valve 35 is switched to supply air to the second cylinder chamber 32. the result,
The door rotation shaft 3 reverses to the opening direction, and after a certain period of time, the timer 45
Since the time limit contact 46 is turned off, the door rotating shaft 3 is reversed again in the closing direction.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications are possible.For example, in the above-mentioned embodiments, microswitches are used as the first and second sensors, but reed switches, etc. A sensor may also be used. Furthermore, although the first and second microswitches employ a normally closed contact and a normally closed contact, respectively, the time limit contact of the timer may be a B contact in a reverse relationship.

Further, in the above embodiment, the first and second sensors are provided, but the first sensor 41 is eliminated and the cam 40 is
The notch 43 may be located at the lever of the second sensor 42 when the door is opened, and the second sensor may not operate when the door is normally opened.

Further, in the above embodiment, a type in which one door is opened and closed is shown, but it can also be applied to a double door type in which two doors are opened and closed by respective drive devices.

〔Effect of the invention〕

As explained above, according to the present invention, when the door starts to open, the thrust of the auxiliary piston acts in addition to the door's own weight.
The door can be quickly lowered and unlocked,
This is particularly effective when the rR area freezes in a cold region. In addition, since the lower end of the second elongated hole of the cylindrical piston is inclined, the door can be raised and rotated at a gentle angle before it comes into contact with the seal rubber, and the door can be closed smoothly. .

Furthermore, if a person or object becomes caught between the door and the vehicle body during the door closing operation, by detecting the rise of the door rotation axis, the door can be immediately opened and reversed, thereby preventing danger.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the vehicle door opening/closing device of the present invention, Fig. 2 is a diagram for explaining its operation, and Fig. 3 is a perspective view showing an example of sensor arrangement. Figure 4 is a diagram showing the electric circuit of the present invention, Figure 5 is a perspective view of a general vehicle door opening, Figure 6 is a sectional view thereof, and Figure 7 is a conventional vehicle door opening. FIG. 2... Drive device, 3... Door rotation axis, 4... Door, 5
...Arm, 10...Lower bracket, 11...
Upper bracket, 20... Cylinder, 21... Cylindrical piston, 22... Piston shaft, 23... First elongated hole, 24... Sliding hole, 25... Oblique hole around 1 , 26...
- Second long hole, 27... Fixed roller, 29... Shaft roller, 30... Auxiliary piston, 31... First cylinder chamber, 32... Second cylinder chamber, 33... ...Third
Cylinder chamber, 34.36...Speed 7A valve regulation, 3S.
... Q4Q valve, 37... Emergency cock, 39... Bearing metal, 40... Cam, 41... First sensor,
42... Second sensor, 43... Notch, 44...
・Door opening/closing switch, 45...Timer, 46...Time-limited contact, 47...Solenoid. Applicant Taihei Electric Co., Ltd. Representative Patent Attorney Hiroki Shirai (2 others) Figure 1 Figure 2 Figure 5 Figure 12'

Claims (3)

[Claims] (1) A piston shaft connected to a door rotating shaft that opens and closes the door, and a cylinder that forms first, second, and third cylinder chambers with a cylindrical piston and an auxiliary piston that are fitted to the piston shaft; a second long hole formed in the cylindrical piston and having a first long hole inclined with respect to the axial direction and a second long hole parallel to the axial direction; It includes an attached shaft roller and a fixed roller fitted into a second elongated hole and attached to the cylinder, and air is constantly supplied to the third cylinder chamber and air is not supplied to the first or second cylinder chamber. A door opening/closing device for a vehicle, characterized in that a cylindrical piston is raised or lowered and the door rotating shaft is rotated or raised to open, close and lock a door. (2) The vehicle door opening/closing device according to claim 1, wherein the lower end of the second elongated hole is inclined with respect to the axial direction by a length corresponding to the length by which the door rotation shaft is raised. . (3) a piston shaft connected to a door rotation shaft that opens and closes the door; a cylinder that forms first, second, and third cylinder chambers with a cylindrical piston and an auxiliary piston fitted to the piston shaft; a second long hole formed in the cylindrical piston and having a first long hole inclined with respect to the axial direction and a second long hole parallel to the axial direction; It includes an attached shaft roller and a fixed roller fitted into a second elongated hole and attached to the cylinder, and air is constantly supplied to the third cylinder chamber and air is not supplied to the first or second cylinder chamber. In a door opening/closing device that opens, closes and locks a door by raising or lowering a cylindrical piston and rotating or lifting the door rotation shaft, the sensor detects the rise of the door rotation shaft during closing of the door. A door opening/closing device for a vehicle, characterized in that the door is reversed in an opening direction for a certain period of time by the operation of the sensor.