JPH0656442U - Vehicle door fastening device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a door-closing device that is safe even if the door cock is operated while the vehicle is traveling. A pneumatic cylinder 11 that opens and closes a vehicle door, and a door cock 25 that shuts off air supply to the pneumatic cylinder 11 by operation and exhausts air from the pneumatic cylinder 11.
In the vehicle door fastening device 1 including the above, the solenoid valve 38 that closes when the vehicle speed exceeds a predetermined speed is provided in the exhaust portion 25a of the door cock.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle door opening / closing device, and more particularly, to a vehicle door opening / closing device with improved safety when handling an emergency door cock.

[0002]

[Prior art]

 This type of vehicle door fastening device is configured as shown in FIG. In FIG. 2, reference numeral 3 denotes a vehicle door, which is a double-drawing door that separates the two doors 3a and 3b into the left and right, and the doors 3a and 3b are respectively a door tightening drive unit 13 installed above the doors. It is connected. The door tightening drive unit 13 has a structure in which the door can be separated into left and right by one pneumatic cylinder, and the door closing solenoid valve 24 switches the air supply to the pneumatic cylinder to control the opening and closing of the door. Has become.

A door cock 25 for opening the pneumatic cylinder to the atmosphere is provided in the air pipe leading to the door closing electromagnetic valve 24 so that the door can be opened from the inside of the vehicle in an emergency. A door switch 2 for detecting the closed state of the door is provided above the door 3b, and the contact point of the door switch 2 is connected to the safety circuit 6. When the doors of the safety circuit 6 are closed, the door switch 2 is turned on to close the circuit, the notification light 4 provided in the driver's cab 7 is turned on, and all the doors are closed to the driver. It is for informing. In addition, the power running (vehicle running) circuit is short-circuited by the output 8 from the relay or relay 5 to enable the power running operation.

Next, the operation of this door tightening device will be described with reference to the piping diagram of FIG. In FIG. 3, the door tightening drive unit 13 of the door tightening device 1 incorporates the pneumatic cylinder 11 and the speed controllers 33 and 34, and 48 is a pressure air source. The pressurized air from the pressurized air source 48 reaches the door closing solenoid valve 24 via the filter 26 and the door cock 25. The door-closing electromagnetic valve 24 includes a pilot switching valve 24a and an electromagnetic pilot valve 24b. The passage 29 communicates with the rod-side chamber 11a via a speed controller 33 and the rod-side chamber 11a via a speed controller 33. Connected to 30. In addition, 18 is a silencer.

At the position where the electromagnetic pilot valve 24b is not excited, the pilot switching valve 24a connects the air supply side passage 28 to the passage 30 leading to the rod side chamber 11a, and the door is closed. At the opposite position where the electromagnetic pilot valve 24b is excited, the pilot switching valve 24a connects the air supply side passage 28 to the passage 29 leading to the rod side chamber 11b, and the door is opened. When the door is automatically opened / closed, the door cock 25 is in the communication position, and the air supply side passage 28 is communicated with the door closing solenoid valve 24. In an emergency, when the lever 36 of the door cock 25 is operated to switch to the open position, the air supply side passage 28 from the door closing electromagnetic valve 24 to the door cock 25 is opened to the atmosphere, and both the passages 29 and 30 are opened to the atmosphere. In the opened state, the piston 15 of the pneumatic cylinder 11 is moved by an external force, and the door can be opened manually.

[0006]

[Problems to be solved by the device]

 By the way, in the door fastening device 1 described above, the door can be manually opened by operating the door cock 25 to switch to the open position. Therefore, if the door cock 25 is operated accidentally or by mischief while the vehicle is running, the door may open, which may lead to a fall accident. A safety device of this type is disclosed in Japanese Utility Model Publication No. 56-49802, which locks a door to a mechanical when pressure air is not supplied, but operates a door cock. And the lock is released, and it is not a fall prevention measure while running.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a door locking device that is safe even if a door cock is operated while the vehicle is traveling. To provide.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, a vehicle door fastening device of the present invention is a pneumatic cylinder that opens and closes a vehicle door, and shuts off air supply to the pneumatic cylinder by operation and performs exhaust from the pneumatic cylinder. In a vehicle door tightening device including a door cock, an electromagnetic valve that closes when the vehicle speed exceeds a predetermined speed is provided in the exhaust portion of the door cock.

[0009]

[Action]

 According to the above configuration, when the vehicle is at a predetermined speed or faster, the electromagnetic valve provided in the exhaust portion of the door cock closes, so even if the door cock is operated, the pressurized air is not discharged from the pneumatic cylinder and the door cannot be opened manually. . When the vehicle speed is less than the specified speed, the solenoid valve opens and the door cock is operated to expel the compressed air from the pneumatic cylinder and to open the door manually.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a piping diagram of a door fastening device of the present invention. In FIG. 1, parts having the same functions as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

First, the configuration will be described. 1 is different from FIG. 3 in that the solenoid valve 38 is provided in the exhaust passage 25a from the exhaust hole of the door cock 25, the solenoid valve 38 is connected to the door safety device 39 separately installed in the vehicle, and the signal is actuated. This is the point I chose to do. The door closing safety device 39 is a safety device that is installed for another purpose so that the door closing circuit is not configured unless the vehicle speed becomes 5 km / h or less. It is used in this door closing circuit. The solenoid valve 38 is controlled by diverting the control signal 40 based on the speed.

Next, the operation will be described. The solenoid valve 38 is normally open in the illustrated example, and when the vehicle speed exceeds 5 km / h, the solenoid valve 38 is excited by the control signal 40 to close the valve and shut off the exhaust passage 25a of the door cock 25. Therefore, even if the door cock 25 is operated, the compressed air in the pneumatic cylinder 11 is not discharged, and the door is not opened manually. Therefore, even if the door cock 25 is operated accidentally or by mischief during traveling, it is possible to prevent a situation in which the door opens and a fall accident occurs. When the vehicle is stopped or at a speed of 5 km / h or less, the solenoid valve 38 is demagnetized by the control signal 40 to open and the exhaust passage 25a is opened. Therefore, by operating the door cock, the pressurized air is discharged from the pneumatic cylinder, and the door can be opened and closed manually, which allows the vehicle to escape from the vehicle in an emergency. In the present embodiment, the door can be manually opened and closed by operating the door cock not only when the vehicle is stopped, but since it is a low speed of 5 km / h or less, a fall does not lead to a serious accident. Although the solenoid valve 38 is normally open in the above description, it can be closed normally by reversing demagnetization.

In this embodiment, the solenoid valve 38 is controlled by using an existing device as the speed detecting / controlling means, but a dedicated speed detecting / controlling means may be used. In this case, the speed at which the solenoid valve 38 operates may be set appropriately, and may be set to 0 km / h, for example.

Further, although the door cock 25 is manually operated in the above description, the present invention can be similarly applied to an electromagnetic valve.

[0015]

[Effect of device]

 As described above, in the vehicle door fastening device of the present invention, the exhaust valve of the door cock is provided with the solenoid valve that closes when the vehicle is at a predetermined speed or higher. Even if operated, the pressurized air is not discharged from the pneumatic cylinder, so the door will not open and safety can be ensured.

[Brief description of drawings]

FIG. 1 is a piping diagram of a door fastening device of the present invention.

FIG. 2 is a diagram showing an outline of a conventional door fastening device.

FIG. 3 is a piping diagram of a conventional door fastening device.

[Explanation of symbols]

 1 Door Closing Device for Vehicle 3 Door for Vehicle 11 Pneumatic Cylinder 25 Door Cock 25a Exhaust Passage (Exhaust Portion of Door Cock) 38 Solenoid Valve

Claims (1)

[Scope of utility model registration request] 1. A vehicle door fastening device comprising: a pneumatic cylinder that opens and closes a vehicle door; and a door cock that shuts off air supply to the pneumatic cylinder by operation and exhausts air from the pneumatic cylinder. A door closing device for a vehicle, wherein an electromagnetic valve that is closed when a vehicle becomes a predetermined speed or more is provided in an exhaust portion of the door cock.