JPH0119030B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door opening/closing cylinder device in which two sets of cylinder mechanisms can be operated in four ways by operating two switching valves, and in particular to a double-opening type door opening/closing device as seen in railway vehicles. The present invention relates to a cylinder device for use in opening and closing doors.

It has two sets of cylinder mechanisms each including a cylinder, a piston that is slidably inserted into the cylinder, and a piston rod that extends from the piston and projects outside the cylinder, and supplies pressurized fluid to the two sets of cylinder mechanisms. There is a cylinder device in which two sets of switching valves are incorporated into the pressure fluid control circuit that controls discharge, and by operating these two switching valves, the two sets of cylinder mechanisms are operated in several ways. . That is, for example, when opening and closing double doors on a railway vehicle, the piston rod of one cylinder mechanism is connected to one door, and the piston rod of another cylinder mechanism is connected to the other door, so that both doors can be opened automatically. There are models that can perform three operations: opening, automatic closing of both doors, and manual opening and closing of both doors.

However, in the case of this kind of conventional cylinder device, as mentioned above, only two switching valves can be operated in a maximum of three ways, and current demands are met in the field of railway vehicles, etc., which are often used for opening and closing doors. I was unable to fully respond to this. In other words, in railway cars with double doors that connect cities and suburbs, in order to improve heating and cooling efficiency, it is being considered to open only one door at stations where there are few passengers getting on and off. In addition, it was completely impossible to open only one door.

An object of the present invention is to provide a cylinder device that eliminates the above-mentioned problems.

In order to achieve this object, the present invention includes two sets of cylinders, a first and a second cylinder, each of which has two chambers defined by a piston, and a piston rod extending from the piston extends outside the cylinder. In a door opening/closing cylinder device equipped with a door opening/closing mechanism, one chamber in each of the first and second sets of cylinder mechanisms is selectively connected to a pressure fluid source and a low pressure source via a first opening/closing valve. Connected to the first switching valve to be connected and connected to the low pressure source via a release valve that bypasses the first on-off valve and the first switching valve, and connecting the other chamber in the second cylinder mechanism. , second
connected to a second switching valve that connects and switches between a pressure fluid source and a low pressure source via an on-off valve, and connects the other chamber in the first cylinder mechanism to the second switching valve by bypassing the second on-off valve The first and second on-off valves and the release valve are connected to the switching valve, and the first and second on-off valves and the release valve are operated by receiving fluid pressure after passing through the first and second switching valves, respectively. , the second on-off valve is closed only when the first and second switching valves respectively close their low pressure source release ports and receive both fluid pressures from both switching valves, and The release valve is characterized in that it operates in the opposite direction to the first and second on-off valves and is opened when the first and second on-off valves are closed.

The present invention will be described in detail below based on embodiments shown in the drawings. In FIG. 1, 1 is a main body, and the main body 1 also serves as the cylinders of the first and 22nd cylinder mechanisms A and B. Two pistons 2A and 2B are fitted into the main body 1 so as to be slidable in the left and right directions in the figure, and a piston rod 3A integrated with the piston 2A is slidably inserted through the main body 1 to the right in the figure. A piston rod 3B that protrudes and is integrated with the piston 2B slidably passes through the main body 1 and protrudes to the left in the figure.

Of the two chambers 4A and 5A in the first cylinder mechanism A defined by the piston 2A, the piston 2A
In the chamber 4A facing the back side (the side without the piston rod 3A), there are three passages 6 formed in the main body 1.
A, 7A, 8A are opened, two of these passages 6A, 7A are at the end of the chamber 4A, and the passage 8A is slightly inward from the end within a distance shorter than the axial length of the piston 2A. It is opened to aisle 6
A is provided with a check valve 9A that only allows pressure fluid to flow into the chamber 4A, a passage 7A is provided with a throttle valve 10A, and a passage 8A is provided with a check valve 9A that allows pressure fluid to flow outside the chamber 4A. Check valve 1 that only allows flow of
1A is provided. These three passages 6A, 7
A, 8A communicate with a passage 12A formed in the main body 1, and these four passages 6A, 7A, 8A, 12A
This constitutes a pressure fluid supply/discharge path to the chamber 4A.

Further, in the other chamber 5A formed in the cylinder mechanism A, there are three passages 13 formed in the main body 1.
A, 14A, 15A are opened, among which passage 1
3A and 14A are located at the end of the chamber 5A, and a passage 15 is also provided at the end of the chamber 5A.
A is opened slightly inward within a distance shorter than the axial length of the piston 2A. Passage 13A
is provided with a check valve 16A that only allows pressure fluid to flow into the chamber 5A, a throttle valve 17A is provided in the passage 14A, and a passage 15A is provided that allows pressure fluid to flow outside the chamber 5A. A check valve 18A that only allows flow is provided. These three passages 13
A, 14A, 15A are passages 1 formed in the main body 1
9A, these four passages 13A, 14
A, 15A, and 19A constitute a pressure fluid supply/discharge path to the chamber 5A.

On the other hand, in the second cylinder mechanism B, two chambers 4B and 5B are defined by the piston 2B, and a pressure fluid supply and discharge path to both chambers 4B and 5B is formed in the main body 1. . The passages, check valves, and throttle valves in this supply/discharge passage section are constructed in the same manner corresponding to the cylinder mechanism A, so components corresponding to those of the cylinder mechanism A will be designated by the reference numerals. Duplicate explanation will be omitted by using "B" instead of "A" in the middle.

20 is a pressure fluid source, which includes a first;
Each inlet 21A of the second electromagnetic switching valve 21A, 2B
-1 and 21B-1 are independently connected. These switching valves 21A, 21B, by their excitation or demagnetization, control the outlet ports 21A-2, 21B-2.
It selectively communicates with the inflow ports 21A-1, 21B-1 or the low pressure source release ports 21A-3, 21B-3. Compressed air is generally used as the pressure fluid, but in this case, the low pressure source is the atmosphere, and when pressure oil is used as the pressure fluid, the low pressure source is an oil reservoir tank. .

22A is a first opening/closing valve, 22B is a second opening/closing valve/release valve, and both valves 22A, 22B cooperate with the switching valves 21A, 21B to control each of the two cylinder mechanisms A, B. Room 4A, 4B, 5A, 5B
Pressure fluid is supplied and discharged as appropriate.

First, the first on-off valve 22A will be explained.
Inside the main body 23A, there are two partition walls 24A, 25.
Five chambers 28A, 29A, 30A, 31A, 32A are defined in series by A and two pistons 26A, 27A slidably inserted into the main body 23A. These two pistons 26A, 2
7A is the rod 3 that slides through both partition walls.
3A, the rod 33A is integrated into the chamber 32A.
It is biased upward in the figure by a return spring 34A interposed therein. The upward stroke end position of the rod 33A is determined by a stopper 35A integrated with the rod 33A in the chamber 32A coming into contact with the partition wall 25A. Two connection ports 36A and 37A are opened in the chamber 28A, a connection port 38A is opened in the chamber 30A, and two connection ports 39 are opened in the chamber 31A which becomes the valve chamber.
A, 40A are open. The piston 27A serves as the valve body of the first on-off valve 22A, and when it is at the upper stroke end position shown in the figure,
When the two connection ports 39A and 40A that open to the chamber 31A are in communication (the first on-off valve 22A is open) and are at the downward stroke end position, that is, when the piston 27A is seated on the valve seat 41A formed in the main body 23A. In this case, the two connection ports 39A and 40A are shut off (the first on-off valve 22A is closed).

Next, the second on-off valve/release valve 22B will be explained, but the same components as the first on-off valve 22A are given the same reference numerals and the explanation thereof will be omitted. This valve 22B has another partition wall 42 with respect to the valve 22A.
B, thereby defining yet another chamber 43B communicating with the chamber 32B between the chamber 31A and the chamber 32A of the valve 22A. This room 4
3B has a low pressure source release port 44B opened,
A connection port 45B is opened in the chamber 32B. Further, a stopper 35B corresponding to the stopper 35A in the valve 22A is configured as a valve body for communicating and blocking the low pressure source release port 44B and the connection port 45B. When the rod 33B is at the upward stroke end as shown in the figure, the connection ports 39B and 40B communicate with each other (the second on-off valve is open), while the stopper 35B as a valve body contacts the valve seat 46B formed on the partition wall 42B. When seated, the low pressure source release port 44B and the connection port 45B are shut off (the release valve is closed). Further, when the rod 33B is at the downward stroke end, the connection ports 39B and 40B are shut off (the second on-off valve is closed), and the stopper 35B is separated from the valve seat 46B and connected to the low pressure source release port 44B. It communicates with the connection port 45B (release valve opens).

Here, the first and second switching valves 21A, 21B, the first on-off valve 22A, the second on-off valve and release valve 22B
The connection relationship between the cylinder mechanism A and the first and second cylinder mechanisms A and B will be explained. Outlet 2 of the first switching valve 21A
A pipe 47 extending from 1A-2 is branched into two and connected to connection ports 36A and 39A of the first on-off valve 22A. In addition, the pipe 48 extending from the outlet 21B-2 of the second switching valve 21B is branched into three pipes: a connection port 38A of the first on-off valve 22A, a second
Each connection port 36B, 3 of the on-off valve/release valve 22B
Connected to 9B. And the first on-off valve 22
Connection port 37A of A and second on-off valve/release valve 22
It is connected to the connection port 38B of B via piping 49.

On the other hand, communication passages 19A and 1 of cylinder mechanisms A and B
9B are communicated with each other by a pipe 50, and the pipe 50 is connected to the connection port 40A of the first on-off valve 22A and the connection port 45B of the second on-off valve/release valve 22B.
It is connected to the. Further, the communication passage 12A of the cylinder mechanism A is connected to the connection port 37B of the second on-off valve and release valve 22B via a pipe 51. Furthermore, the communication passage 12B of the cylinder mechanism B is
Via the piping 52, the second on-off valve/release valve 22
It is connected to the connection port 40B of B.

Note that the connection relationship described above is the same as that of the first on-off valve 22A.
This also includes the connection relationship for controlling the operation of the second opening/closing valve/release valve 22B.
Connection relationships other than those for valve operation are schematically shown in FIGS. 3 to 6. In FIGS. 3 to 6, the second on-off valve is designated by the symbol 22B- out of the second on-off valve/release valve 22B.
1 and the release valve is designated by 22B-2.

As shown in FIG. 2, the cylinder device as described above is constructed by fixing the main bodies 1 of the cylinder mechanisms A and B to the car body 53 of the railway vehicle, and connecting the piston rod 3A to one door 54A of the double door 54. It is used by connecting the piston rod 3B to the other door 54B.

Next, regarding the effects of the present invention, the first and second effects will be explained.
4 depending on the switching operation mode of the switching valves 21A and 21B.
I will explain each case separately. For convenience of explanation, it is assumed that compressed air is used as the pressure fluid, and the operation mode of the first and second switching valves 21A and 21B is such that the outflow ports 21A-2 and 21B-2 are connected to the inflow port 21A- 1, 21B-1, it is referred to as "air supply", and the outlet 21A-2, 21B-
2 to the low pressure source release ports 21A-3 and 21B-3 will be described as "exhaust".

The first switching valve 21A is "exhaust", the second switching valve 2
When 1B is “air supply”.

At this time, in the operating mode shown in FIG. 3 and in the state shown in FIG. 1, both doors 54A and 54B are "automatically fully opened" by the pressure of the compressed air.
That is, the compressed air from the pressure fluid source 20 is
The first on-off valve 2 passes only through the second switching valve 21B.
2A chamber 30A, second on-off valve and release valve 22
It is supplied to chambers B 28B and 31B. At this time, the rod 33A of the first on-off valve 22A
The pressure of compressed air supplied to 0A is the pressure of the compressed air supplied to piston 2.
7A, it receives a downward force in Figure 1, but this force is stronger than the return spring 3.
As a result of the strong biasing force of 4A, the valve becomes open at the upper stroke end position (connection ports 31A and 4A
0A). In addition, the second on-off valve 22
Although the rod 33B of B receives a force downward in FIG. Together with the air applying an upward force to the rod 33B, the rod 33B is at its upper stroke end position, the second on-off valve 22B-1 is opened (connection ports 39B and 40B are in communication), and the release valve is closed. 22B-2 is closed (low pressure source release port 44B and connection port 45B are cut off).

Therefore, the compressed air that has passed through the second switching valve 21B is supplied to the chamber 4B of the cylinder mechanism B after passing through the second on-off valve 22B-1 and the piping 52, while the compressed air passes through the piping 51 from the chamber 28B. It is also supplied to the chamber 4A of the rear cylinder mechanism A. and,
The chambers 5A and 5B of the cylinder mechanisms A and B both have a pipe 50, a first on-off valve 22A, and a first switching valve 21A.
After passing through, it is released into the atmosphere. As a result,
Due to the pressure difference acting on the piston 2A, the piston rod 3A moves to the right in Figure 1 to open the door 54A, and due to the pressure difference acting on the piston 2B, the piston rod 3B moves to the left in Figure 1 to open the door 54B. Let's open.

Incidentally, as the piston rods 3A, 3B are displaced, the pistons 2A, 2B move into the passages 15A, 3B.
15B, the compressed air from the chambers 3A, 3B flows through the passages 14A, 1, which are throttled by the throttle valve 17A.
The piston rods 3A and 3B are decelerated.

The first switching valve 21A is "air supply", the second switching valve 2
When 1B is "exhaust".

At this time, in the operating state shown in FIG. 4, both doors 54A and 54B are closed by the pressure of compressed air, ie, "automatically fully closed." That is, the compressed air that has passed through the first switching valve 21A is transferred to the first switching valve 2.
2A chamber 28A and second on-off valve/release valve 2
2B is supplied to chamber 30B, and due to the force relationship with the aforementioned return springs 34A and 34B,
Each rod 33A, 33 of both valves 22A, 22B
B is in the upper strobe end position shown in FIG. Therefore, the chamber 4A of the cylinder mechanism A is
Through the piping 51, the chamber 28B, and the piping 48, the chamber 4B of the cylinder mechanism B is released to the atmosphere from the second switching valve 21B through the piping 52, the second on-off valve 22B-1, and the piping 48, respectively. . On the other hand, each chamber 5A, 5B of the cylinder mechanisms A, B is supplied with compressed air that has passed through the first switching valve 21A and the first on-off valve 22A. As a result, the piston rod 3A of the cylinder mechanism A is driven to the left in FIG. 1, and the piston rod 3B of the cylinder mechanism B is driven to the right in FIG.
4A and 54B are both closed.

When both switching valves 21A and 21B are set to "air supply".

At this time, in the state shown in FIG. 5, only one door (door 54A in the embodiment) is automatically opened, resulting in "single door automatic opening". That is, both switching valves 21A,
21B opens, the first on-off valve 22
Compressed air is supplied to two chambers 28A and 30A of A, and compressed air is supplied to two chambers 28B and 30B of a second opening/closing valve/release valve 22B. As a result, rod 3 of both valves 22A, 22B
3A and 33B have return springs 34.
A stronger downward pressing force than the rods 33A and 34B in FIG.
22B-1 are both closed, and release valve 2
2B-2 is open. Therefore, for the cylinder mechanism A, the chamber 5A is the release valve 22.
B-2 to the atmosphere and chamber 4.
A is supplied with compressed air that has passed through the second switching valve 21B. As a result, the piston rod 3A
moves to the right in FIG. 1, and the door 54A is opened.
On the other hand, regarding cylinder mechanism B, its chamber 5B
is released to the atmosphere via the release valve 22B-2, but the chamber 4B remains blocked by the second on-off valve 22B-1. As a result, the piston rod 3B remains in its stationary position, and the door 54B does not move.

When both switching valves 21A and 21B are in "exhaust" position.

At this time, both doors 54 are in the state shown in FIG.
A and 54B can be opened and closed manually, resulting in "manual opening and closing of both doors." That is, the first on-off valve 2
2A and the rod 33B of the second on-off valve/release valve 22B are both at the upper stroke end, both on-off valves 22A and 22B-1 are open, and the release valve 22B-2 is closed. And each chamber 4A of cylinder mechanism A, B,
5A, 4B, and 5B are each released to the atmosphere. As a result, if the passenger enters door 54A or 54B
By applying an external force to both doors 54A, 5
One or both of 4B can be opened and closed freely.

Each operation mode has been explained above, but the above operation is always performed after the above operation (the doors 54A, 54B are automatically fully closed once).
It will be carried out.

Note that, unlike the embodiment, the piston rod 3
The operating directions of doors A and 3B and the opening and closing directions of doors 54A and 54B may be reversed. Of course, in this case, the connections between the chambers 4A, 5A, 4B, 5B of the cylinder mechanisms A, B and the valves 22A, 22B are changed as appropriate.

As is clear from the above description, the present invention has the following features:
By operating the two switching valves 21A and 21B, the two sets of cylinder mechanisms can be operated in four ways, satisfying the requirements for opening and closing doors in modern railway vehicles.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional system diagram showing one embodiment of the present invention;
FIG. 2 is a front view showing an example of the connection between a double door and two sets of cylinder mechanisms, and FIGS. 3 to 6 are simplified system diagrams for easily understanding the operation of the present invention. A...First cylinder mechanism, B...Second cylinder mechanism, 1...Body (cylinder), 2A, 2B...Piston, 3A, 3B...Piston rod, 4A, 5
A, 4B, 5B...chamber, 20...pressure fluid source, 21A
...First switching valve, 21A-3...Low pressure source release port, 21
B...Second switching valve, 21B-3...Low pressure source release port, 2
2A...first on-off valve, 22B...second on-off valve and release valve, 22B-1...second on-off valve, 22B-2...release valve.

Claims (1)

[Scope of Claims] 1. A door opening/closing device comprising two sets of cylinder mechanisms, a first and a second cylinder mechanism, each of which has two chambers defined by a piston, and a piston rod extending from the piston extends outside the cylinder. In the cylinder device, a first switch for selectively connecting one chamber in each of the first and second sets of cylinder mechanisms to a pressure fluid source and a low pressure source via a first on-off valve. connected to the low pressure source via a release valve that bypasses the first on-off valve and the first switching valve, and connects the other chamber in the second cylinder mechanism to the second cylinder mechanism.
connected to a second switching valve that connects and switches between a pressure fluid source and a low pressure source via an on-off valve, and connects the other chamber in the first cylinder mechanism to the second switching valve by bypassing the second on-off valve The first and second on-off valves and the release valve are connected to the switching valve, and the first and second on-off valves and the release valve are operated by receiving fluid pressure after passing through the first and second switching valves, respectively. , the second on-off valve is closed only when the first and second switching valves respectively close their low pressure source release ports and receive both fluid pressures from both switching valves, and A door characterized in that the release valve is configured to operate in the opposite direction to the first and second on-off valves and to be opened when the first and second on-off valves are closed. Opening/closing cylinder device.