JPH0139353Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pneumatic door opening/closing device, and in particular,
The opening/closing speed is controlled so that it operates at high speed for a certain period from the opening/closing starting position and then at low speed at the end, and the time from when the closing signal is sent until starting is shortened.

There are two types of pneumatic door opening/closing devices: a differential type that uses the difference in area between the left and right cylinders, and an alternate supply/discharge type that alternately supplies and discharges air to the left and right cylinders.In railway vehicles, etc., the differential type pneumatic type Door opening/closing devices are often used.

In this type of differential pneumatic door opening/closing device, for safety reasons, a solenoid valve that is activated by an opening/closing signal is energized by the opening signal, and pressurized air is supplied to the large cylinder side to open the door and close it. When the signal is turned off, the pressure air from the large cylinder side is discharged and the door is closed. With the above method, when an open signal is sent, the door begins to open almost simultaneously with the signal, and since pressurized air is constantly supplied to the cylinder on the braking side of the opening, the opening of the high-speed opening throttle valve is increased. Even if the opening speed is increased by increasing the opening speed, the buffering action can be sufficiently adjusted using a slow speed throttle valve. Instead of starting to close, the door will start closing later than the signal. On the other hand, in railway vehicles and the like, there is a demand for the closing operation to be performed as soon as possible after the closing signal is sent, in order to facilitate the adjustment of the closing operation within a limited time from the viewpoint of transportation. In order to meet this request, it is necessary to increase the opening of the high-speed throttle valve to rapidly discharge the pressurized air inside the large cylinder, but in this case, the discharge will not be possible until the door starts and enters the slow speed section. Since the pressure air on the side is discharged from the high-speed throttle valve with a large passage area, the speed in the high-speed section increases. This creates a sense of unease for passengers getting on and off the train, and after entering the buffer section, the highly compressed air necessary for braking is exhausted and difficult to obtain, resulting in the problem of not being able to achieve a sufficient buffer speed.

This idea was made to solve the above problem, and in a pneumatic door opening/closing device that uses air pressure to open and close the door, the pressurized air in the control cylinder is exhausted when the door is closed. A rapid exhaust valve is installed in the middle of the exhaust passage to rapidly exhaust the pressurized air in the cylinder until it reaches a constant pressure, and when a close signal is issued, the air is rapidly exhausted to shorten the time until the door starts, and When the pressure reaches a certain level, the rapid exhaust valve closes, leaving the necessary pressure air, and the throttle valve installed in the middle of the exhaust passage allows speed adjustment in the high speed section, as well as smoothing the buffering operation at the end of the closing operation. The present invention provides a pneumatic door opening/closing device characterized by the following features.

This invention will be explained in detail below with reference to embodiments shown in the drawings.

In FIG. 1, 1 is a door, 2 is a hanging door roller rotatably supported on the upper end of the door 1 via a bracket,
3 is a rail that slidably supports the hanging door roller 2;
is a pneumatic door opening/closing device installed above rail 3,
5 is an operating rod of the door opening/closing device 4; 6 is a forked knuckle attached to the tip of the operating rod 5; 7 is a metal fitting connecting the forked knuckle 6 and the hanging door roller 2; When the actuating rod 5 moves to the left in the figure (in the direction of the arrow X), the door 1 opens from the fully closed position shown in the figure, and the actuating rod 5
When the door 1 moves to the right in the figure (in the direction of arrow Y), the door 1 closes.

The pneumatic door opening/closing device 4 has the structure shown in FIG. 2, and the casing 8 has a central cylinder portion 8a.
and the valve body parts 8b and 8c on both sides, and a piston 9 fitted into the cylinder chamber 10 of the cylinder part 8a.
The rod 5 protruding from the door opening side is connected to the door opening side valve body part 8.
The rod 4 is slidably inserted into a hole 11 drilled in b, and the tip of the rod 4 is connected to the forked knuckle 6. The valve body portions 8b and 8c on both sides are connected to air supply and exhaust pipes 14 and 15 branched into two from an air supply pipe 13 connected to a pressure air source 12, respectively, and passages that are open at both end faces of the cylinder chamber 10. 16 and 17 are provided to supply pressurized air to chamber A on the door open side and chamber B on the door closed side, which are partitioned by the piston 9 in the cylinder chamber 10. The supply/exhaust pipe 15 is provided with a solenoid valve 18 that is activated by a door opening/closing signal, and opens a passage with an open signal to supply pressurized air to the B chamber, and closes the passage with a close signal to supply pressurized air in the B chamber. On the other hand, pressurized air is constantly supplied to Room A.

The passages 16 and 17 are provided with air supply check valves 1 and 1, respectively.
9 and 20 are provided to enable supply of pressurized air to chambers A and B, but to prevent discharge of pressurized air from chambers A and B.

Further, a bypass passage 22 is branched from the passage 16 on the door opening side, bypassing the intake check valve 19 and interposing a flow rate restricting valve 21 for the slow speed section. Further, a passage 23 is provided which branches from the upstream side of the air supply check valve 19 in the passage 16 and has an opening P ₂ slightly to the right (door closing side) of the cylinder opening P ₁ of the passage 16. Exhaust valve 24 that allows exhaust from the room but prevents air from being supplied to room A
Flow rate restricting valves 25 for high speed sections are sequentially provided from the upstream side.

On the other hand, a bypass passage 39 that bypasses the air supply check valve 20 and has a flow rate restricting valve 26 for the slow speed section is connected to the valve body part 8c on the door closing side.
It is branched from 7. Further, a protrusion 27 is provided at the center of the end surface of the cylinder chamber of the valve body 8c, and the protrusion 27 is connected to the hollow hole provided in the piston 9.
It is designed so that it can be freely inserted into and removed from a. The protrusion 2
7 is provided with an opening P ₃ at the tip thereof, and a passage 28 communicating with the upstream side of the air supply check valve 20 of the passage 17,
A flow rate restricting valve 29 for the high speed section is provided in the passage 28. Furthermore, an exhaust passage 30 is provided which branches from the downstream side of the flow rate restricting valve 29 of the passage 28 and communicates with the flow rate restricting valve 29.
A quick exhaust valve 31 shown in the figure is provided. The quick exhaust valve 31 has a needle valve 33 at the tip of the valve shaft 32.
At the same time, a spring receiver 34 is attached to the base end, and an adjustment screw 35 screwed into the spring receiver 34 and the valve body portion 8c.
A spring 36 is compressed between the valve 3 and the spring 36.
3 biases the valve seat 37 in the closing direction, and the spring force is adjusted by the adjustment screw 35. A rubber packing 38 that blocks the flow of air from the exhaust valve 31 to the spring 36 is attached from between the base end of the valve shaft and the spring receiver 34 to the valve body portion 8c. The upper passage of the valve seat 37 is a large diameter part 30a, and the lower passage is a small diameter part 30b.The valve shaft 32 is provided with a large diameter part 32a, and pressure is applied to the large diameter part 32a from below. I try to do that.

In the cylinder chamber 10, the ratio of the working area on the side of chamber A to the working area on the side of chamber B is set to be approximately 1:2. Therefore, when pressurized air is supplied to chamber B, The piston 9 moves to the left due to the pressure difference, and moves to the right when the pressurized air in the B chamber is discharged.

In the figure, 40 is a gasket attached to the outer periphery of the piston 9 to keep chambers A and B airtight, 41 is a rod gasket to prevent air leakage from chamber A into the air, and 4
2 is attached to the periphery of the hollow hole 9a of the piston 9,
After the protrusion 27 is fitted, the protrusion 2 is inserted into the hollow hole 28.
This is a rubber gasket on the closing side that blocks the flow of air from 7.

Next, the operation of the pneumatic door opening/closing device having the above structure will be explained.

FIG. 2 shows a state in which the door is fully closed, and the pressurized air passes through the air supply pipe 13, the supply and exhaust pipe 14, and the passage 16, pushes open the check valve 19, and reaches the A room. On the other hand, on the B room side, the solenoid valve 18 receives the closing signal and the supply/exhaust pipe 1
5 communicates with the atmosphere, and chamber B is connected to the flow rate restrictor 2.
Passage 17, supply and exhaust pipe 15 from each gap of 6 and 29
It connects to the atmosphere through the Therefore, since the piston 9 is pressurized to the right, it is pushed to the right,
It remains closed. At this time, the quick exhaust valve 31 is pushed downward by the spring 36 to close the exhaust passage 30, as shown in FIG.

Figure 4 shows the state from when the door is fully closed to when the door moves to open. Since an opening signal is sent to the solenoid valve 18, the supply/exhaust pipe 15 communicates with the air supply pipe 13, and the pressurized air is After passing through the air supply pipe 13, solenoid valve 18, supply and exhaust pipe 15, and passage 17, open the check valve 20,
Supplied to room B. At this time, pressure air acts on the quick exhaust valve 31 from below through the passages 43 and 44, so that it is pushed upward against the spring 36, as shown in FIG. 4, and the passage 30 opens.
Pressure air is also supplied to the B chamber from the passage 30. As a result, the pressurized air filling room A is pushed to the left by the pressure air supplied to room B, and the difference between the force acting to the right due to the pressurized air filling room A is The piston 9 begins to move leftward because it is pushed back to the left by the pressure. As the piston 9 moves leftward, the pressurized air in the A chamber flows through the opening P ₂ to the throttle valve 25 of the passage 23 and the check valve 24.
The air is then pushed back to the pressure air source 12 through the passage 16, the air supply/exhaust pipe 14, and the air supply pipe 13. This state continues until the piston 9 continues moving to the left and reaches the opening _P2 , and the pressurized air from the room A side is discharged via the high-speed section throttle valve 25, so that the door opens at high speed.

As described above, the piston 9 continues to move to the left, and as shown in FIG. 5, when the piston 9 passes through the opening _P2 ,
The pressurized air in the A chamber attempts to pass through the passages 45 and 16 from the opening _P1 to the pressurized air source 12, but since the check valve 19 in the passage 16 acts to prevent the air from being discharged, there is no way out for a moment. Since the air pressure in the A chamber is rapidly increased and resists the leftward movement of the piston 9, the leftward movement speed of the piston 9 is rapidly reduced.
This is the buffering action when the door opens, and then
The pressurized air in the room is gradually exhausted while being throttled by the gap of the throttle valve 21 for the slow speed section, and the door is opened at low speed.

The piston 9 continues to move to the left at a low speed, and as shown in FIG. 6, the piston 9 reaches the left end of the cylinder chamber 10 and stops in the fully open state. In this fully open state, pressure air is supplied to chamber B, so the quick exhaust valve 31 is pushed up against the spring 36, and the exhaust passage 30 remains open.

In the door opening process shown in FIGS. 2, 4, 5, and 6 above, the piston 9 moves quickly at the beginning and slowly at a slow speed at the end, and accordingly, the door moves most of the way at the beginning. It opens quickly and slowly at the end. At this time, the speed adjustment in the high-speed section and the slow-speed section can be arbitrarily adjusted by adjusting the degree of throttling of the throttle valves 25 and 21. .

FIG. 7 shows the state from the fully open state until the door close signal is sent to the solenoid valve 18 and the door closes. When a closing signal is sent to the solenoid valve 18, the supply/exhaust pipe 15 is communicated with the atmosphere. At this time,
The A chamber is filled with pressurized air, and the quick exhaust valve 31 is pushed up against the spring 36 to open the valve seat 37. Therefore, when a closing signal is sent to the solenoid valve 18, the B chamber is filled with pressurized air. The pressure air is supplied by the throttle valves 26, 29
Although it is also discharged from the connection 17 through the gap, most of it is discharged through the rapid exhaust valve 31.
The pressure in chamber B drops instantly. When the pressure in chamber B drops to a constant pressure, chamber A is constantly connected to a pressure supply source 12.
Since more pressure air is supplied, the piston 9
starts moving to the right, and at the same time, the rapid exhaust valve 31 is pushed down by the panel 36, blocking the exhaust passage 30. The operating pressure of the quick exhaust valve 31 by the spring 36 is adjusted to be a little lower than the pressure at which the pressure balance between chambers A and B is disrupted, the piston 9 begins to move to the right, and the door begins to close.

After the piston 9 starts moving to the right and the exhaust passage 30 is shut off, the pressurized air in the A chamber is exhausted through the high speed throttle valve 29 in the passage 28 and the slow speed throttle valve 26 in the passage 46, and the piston 9 moves rapidly. Continue to the right.

As the piston 9 moves to the right, the air pressure in chamber B increases, but when the rapid exhaust valve 31 is pushed up, air pressure is applied to both sides of the large diameter section 30a and the lower small diameter section 30b of the passage 30. However, as shown in FIG. 8, once it is closed, the large diameter portion 30a
The side is connected to atmospheric pressure, and only the small diameter part 30b side is pressurized, and the pressure of the spring 36 and the dimensions of the small diameter part 30b are determined so that the valve 31 is not pushed up in the normal state, so the quick exhaust valve is closed again. 31 is not pushed up and the exhaust passage 30 is not opened.

The piston 9 continues to move to the right until the closing seal 42 provided on the end face of the hollow hole 9a of the piston 9 fits into the protrusion 27 and blocks the passage 28, as shown in FIG. 9 operates at high speed. When the passage 28 is blocked, the pressurized air in the B chamber tries to exit to the atmosphere through the passages 46 and 17, but the check valve 20 works to prevent exhaustion.
There is no escape route for a moment, and the air pressure in chamber B increases rapidly, resisting the movement of piston 9 to the right.
The moving speed of the piston 9 rapidly decreases. This operation is a buffering operation when closing, and the pressurized air in chamber B is gradually discharged from the gap in the slow speed throttle valve 26, the piston 9 moves to the right at low speed, and the cylinder chamber 10
reaches the rightmost edge of. In this way, the piston 9 moves quickly at first and slowly at the end with a buffering action, and correspondingly, the door moves quickly most of the time at first and then slowly at the end with a buffering action.
It closes gently at the end. In the door closing operation, the speed in the high speed section and the slow speed section is controlled by the throttle valve 2.
By adjusting the degree of diaphragm 9 and 26, the amount can be increased or decreased as desired.

Incidentally, this invention is not limited to the above-mentioned embodiment, but may have a structure shown in FIG. 9. In this device, a large-diameter piston 9'A and a small-diameter piston 9'B provided at both ends of the rod 4' are slidably fitted into the cylinder chamber 10', and a A pinion 50 that forms a rack 4'a and engages with the rack 4'a is rotatably supported on the cylinder wall, and a shaft portion (not shown) that rotates together with the pinion 50 and projects outward from the cylinder. is connected to the hanging door roller of the door via means for moving and converting it in the horizontal direction, and the door is opened and closed in accordance with the movement of the rod 4'.

Pressure air is constantly supplied to the A' chamber partitioned by the small-diameter piston 9'B from the compressed air source 12' through the passage 16' of the valve body 8'b configured in the same manner as in the above embodiment. When the door is opened, the pressure air in the A' chamber is exhausted from both the high-speed throttle valve 25' and the slow-speed throttle valve 21', and at the end of the opening operation, the opening _P'2 is closed. Pressure air is discharged from the opening _P'1 through the slow speed throttle valve 21', so that the rod 4' initially moves to the left at high speed for most of the time, and finally moves slowly to the left at low speed.

On the other hand, on the valve body 8'c side that supplies and discharges pressurized air to the B' chamber partitioned by the large-diameter piston 9'A, a main passage 17' and a passage with a slow speed throttle valve 26' are interposed. 39' opens at the tip of the B' chamber, and one end communicates with the main passage 17' and the other end opens at the side wall of the cylinder chamber 10', and a high-speed throttle valve 29' and a quick exhaust valve 31. A passage 30' is provided. Therefore, when the door closes, the pressurized air in the B' chamber is discharged from the passage 30' through the rapid exhaust valve 31' and the throttle valve 29', and as soon as the closing signal is sent, the rod 4' moves to the right. When the piston 9'A passes the opening of the passage 30',
The pressurized air in chamber B' is discharged from passage 27' through throttle valve 26' for slow speed, and rod 4' moves to the right at low speed. Therefore, the door closes at high speed most of the time at first, and then slowly closes completely at the end.

The above embodiments are all applied to differential pneumatic door opening/closing devices, but they can also be applied to alternating supply/discharge type pneumatic door opening/closing devices that alternately supply and discharge pressurized air to the left and right cylinders. Needless to say, it can be applied.

As is clear from the above explanation, according to the pneumatic door opening/closing device according to this invention, by providing a quick exhaust valve in the passage for discharging pressurized air from the cylinder chamber (chamber B) when the door closes, Regardless of the opening degree of the high-speed throttle valve, the pressurized air in the cylinder chamber (chamber B) can be rapidly discharged to a constant pressure, reducing the time from when a close signal is sent to when the engine starts. can. In addition, when the pressure reaches a certain level, the rapid exhaust valve closes and the air pressure necessary to generate braking force can be secured, making it possible to adjust speed in high speed sections, as well as buffer operation and speed adjustment in slow speed sections. It has the advantage that it can also be used.

[Brief explanation of drawings]

Figure 1 is a side view of a door equipped with the pneumatic door opening/closing device according to this invention, Figure 2 is a sectional view showing the state of the pneumatic door opening/closing device when the door is fully closed, and Figure 2 is a quick exhaust valve. Figure 3 is a detailed cross-sectional view of the quick exhaust valve, Figure 4 is a cross-sectional view from when the door is fully closed to opening, and Figure 4 is an enlarged cross-sectional view of the quick exhaust valve shown in Figure 4. Figure 5 is a cross-sectional view of the buffering operation during the opening operation of the door, Figure 5 is a cross-sectional view of the rapid exhaust valve in Figure 5, Figure 6 is a cross-sectional view of the door in its fully open state, and Figure 6 is a cross-sectional view of the rapid exhaust valve in Figure 5. A sectional view of the quick exhaust valve in FIG.
Figure 7 is a cross-sectional view of the door from the fully open position to the closing operation, Figure 7 is an enlarged cross-sectional view of the rapid exhaust valve in Figure 7, Figure 8 is a cross-sectional view of the door during the closing operation,
The figures are an enlarged sectional view of the rapid exhaust valve in Figure 8, and Figure 9.
The figure is a sectional view showing another embodiment of this invention. 1... Door, 4... Opening/closing device, 5... Rod, 8
... Cylinder, 8b, 8c ... Valve body portion, 9 ... Piston, 9a ... Hollow hole, 12 ... Pressure electricity source,
16, 17, 22, 23, 28, 30, 39...
Passage, 21, 26... Slow speed flow restrictor, 2
5, 29...High speed flow restrictor, 27...Protrusion, 31...Rapid exhaust valve.

Claims (1)

[Claims for Utility Model Registration] (1) A valve body is provided on both sides of the cylinder chamber on which the piston slides, and the pressurized air provided in the valve body is supplied to the chambers on both sides of the cylinder partitioned by the piston. In a device that operates a piston by supplying and discharging pressurized air through a passage that controls the flow rate and flow, and that operates the door by linking the operation of the piston with the door, a high-speed A passage with a flow rate throttle valve for the section is opened in the side surface near the end face of each cylinder chamber, and a passage with a flow rate throttle valve for the slow speed zone is opened in the end face of each cylinder chamber, The piston operates at high speed until it reaches the opening position of the throttle valve for the high speed section, and operates at low speed after passing through the opening, while it is biased by a spring and opens when air pressure above a certain pressure is applied. An exhaust passage with an operating rapid exhaust valve interposed therein is provided, and the exhaust passage is communicated with the cylinder opening of the throttle valve for the high-speed section to rapidly exhaust the pressurized air in the cylinder chamber until it reaches a constant pressure. A pneumatic door opening/closing device characterized by having a configuration that shortens the closing start time. (2) In the device described in claim (1) of the utility model registration claim, pressurized air is constantly supplied to the chamber on the door opening side (chamber A) partitioned by the piston of the cylinder chamber, and the chamber on the door closing side is The chamber (chamber B) supplies and discharges pressurized air, and is constructed so that the ratio of the working areas of the chambers A and B is approximately 1:2, and the exhaust passage with the rapid exhaust valve interposed therebetween is connected to the chamber B. The protrusion is provided on a protrusion protruding from the end face of the chamber, and the protrusion can be fitted into and removed from a hollow hole provided in the piston. When the hollow hole of the piston and the protrusion are fitted, a rubber gasket attached to the end face of the hollow hole closes the protrusion. A pneumatic door opening/closing device characterized by having a configuration that blocks an opening of an exhaust passage provided in a section.