JPS63190990A - Pushbutton type valve operation device - Google Patents

Abstract

PURPOSE:To make light operation attainable as well as to aim at the dependability of action, by having the other end of a second valve stem inserted into an interconnecting hole piercing through both first and second valve chests opposed to the first valve stem connected to a pushbutton switch. CONSTITUTION:Each of first and second valve chests a A and B are installed at both sides of a cylindrical case 1, while these valve chests A and B are connected together through an interconnecting hole C, and valve seats D and E are projectingly formed in these valve chests A and B. Inside the interconnecting hole C, these is the second valve packing 2 pressed to the valve seal E by a coil spring 3 on a lower surface of the tip part, and also there is provided with a second valve stem 4 to be moved by interlocking with a pushbutton switch 12. When this pushbutton switch is operated, a first valve stem 9 moves and valve packing 6 comes into contact with the second valve stem 4. With this constitution, even if a stroke of the first valve stem 9 is little, it is surely operated while operating physical force also can be made very smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a valve operating device, such as a push-button valve operating device for controlling an air conditioner of an automobile using the vacuum of an engine manifold as a power source.

Conventional technology This type of push-button valve operating device has been developed since 1987-1.
As described in Japanese Patent No. 9909, a heart-shaped groove is formed on the upper surface of the valve operating part, and the locking mechanism is superimposed on the valve operating part together with the operating lever having a locking bottle, so that the shaft It is constructed so that it does not become too long in the direction. FIGS. 3 and 4 show the configuration of a conventional push-button valve operating device. In the figure, 1' is a terminal plate in which communicating holes 2/ and s/ are formed. Pipes 4' and 15' are connected to the communicating holes 2/ and 3/, respectively. 6' is a valve face body fixed to the terminal plate 1', and there is a seat packing 7' between the valve face body 6' and the valve face body 6'.
The through holes 12', 13' provided in and the communication hole 2/
, 3/ are communicated with each other through communication passages 8' and 9'. A spool chamber 10' is formed inside the valve face body 6'. One end of the opening 11' opens into the spool chamber 10',
The other end communicates with the atmosphere. A slidable eggplant spool valve 14' is accommodated in the spool chamber 10', and seal bodies 15' and i6' are attached to the outer periphery of this spool valve 14'. A spring 17' always biases the spool valve 14' in a direction opposite to the direction in which the operating lever 18' is pressed. A heart-shaped groove 19' is formed in the upper surface of the valve face body 6', and an operating lever 18' having a locking pin 20' is disposed thereon, and one end of the operating lever 18' is bent at a right angle. It has a bent portion, and is connected and fixed to the spool valve 14' with a nand.

Next, the operation of the above conventional example will be explained. In FIG. 4, when the operating lever 18' is operated and the locking pin 20' is held in the heart-shaped groove 19 lock position, the spool valve 14' has a through hole between its seal bodies 15' and 16'. 12
', 13' is held at the position where it is located. Therefore, the through holes 12' and 13' communicate with each other, and the piping 4 is connected to the actuator.
', communication hole 2', communication path 8'1 through hole 12', spool chamber 10'1 through hole 13', and communication path 9'.

The vacuum pressure of the engine manifold is transmitted through the communication hole 3' and the pipe 5' to operate the actuator.

Next, when the operating lever 18' is pushed to release the lock, it returns to its initial position due to the biasing force of the spring 17'.

At this time, the spool valve 14' is held at a position where its seal body 16' is located between the through holes 12' and 13'. Therefore, the through hole 13' and the atmospheric passage 11' communicate with each other, and the actuator is connected from the atmospheric passage 11' to the spool chamber 10'1 through the through hole 13', the communicating passage 9', the communicating hole 3'1, and the piping 5'. Atmosphere is sent. By repeating this operation, the actuator can be operated.

Problems to be Solved by the Invention However, in the conventional push-button valve operation device described above, the operation lever 18' is operated to move the spool valve 14' to open the through hole 12' between the seal bodies 15' and 16'. , 13'
A considerable distance is required to position it.

(In other words, unless the lock stroke is large, the operation cannot be performed reliably.) Furthermore, the seal bodies 15' and 16' attached to the spool valve 14' are in close contact with the inner wall of the spool chamber 10', preventing air from leaking. A structure like this is required,
Due to the length of the stroke, there is a problem in that the operating force required to operate the operating lever 18' is quite heavy. The present invention solves these conventional operability problems.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a cylindrical case having a partition inside, and a first cylindrical case on both sides of the partition of the case. A second valve chamber is provided, and these first and second valve chambers are provided. The second valve chamber is connected to the second valve chamber by a communication hole that passes through the partition, and valve seats that project into the valve chamber are formed on both sides of the communication hole, and a lateral outflow passage is provided in the communication hole. connect,
An inflow passage is connected to the first valve chamber, and within the communication hole,
Insert a second valve rod whose tip end is connected to a second valve packing biased by a second spring to the valve seat in the second valve chamber, and insert the other end of the second valve rod. A first valve packing is provided to protrude into the first valve chamber and correspond to the protrusion of the second valve stem, and a pushbutton switch is connected to the first valve packing via the first valve stem. The first valve stem is urged by a first spring in a direction opposite to the valve seat, and a latch mechanism is engaged with the push button switch.

Effect: According to the above configuration, the first. providing a second valve chamber;
Since the valve stem and pushbutton switch are arranged in a straight line with the communication hole, it is possible for the first packing on the operation side to close the valve seat of the valve chamber with a small stroke. Also, since the valve chamber of the valve stem of this first packing is always in a vacuum state, a force is applied to the valve stem in the operating direction, and a slightly larger force than this force is applied to the valve stem in the opposite direction to the operating direction. If a force is applied to the valve stem by a spring in this direction, the operating force of the push button switch can be made very small. In addition, when the spring load is increased to maintain balance, a large force is applied to the pushbutton switch when the valve chamber is not in a vacuum state, so by adjusting the outer diameter of the valve stem, it is necessary to The force of the spring that biases the force in the opposite direction can also be adjusted. Therefore, the present invention is very effective for achieving short strokes and light operating force, which is required when valve operating devices are provided for only some of the switches in a multiple switch arrangement of heater control switches in automobiles, etc.

Example Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

A first tube is installed on both sides of a cylindrical case 1 having a partition in the center. Second valve chambers A and B are provided, and these valve chambers A and B are connected through a communication hole C, and valve seats E are formed in the valve chambers A and B to protrude. Further, an outflow passage F is provided laterally from the communication hole C, and an inflow passage G is provided from the valve chamber A. Inside the communication hole C,
It has a second valve packing 2 pressed against the valve seat 2 by a coil spring 3 on the lower surface of the tip, and a push button/switch 12.
A first valve rod 4 is provided which moves forward and backward in conjunction with the valve, and its rear end is provided so as to protrude into the valve chamber A.

A cylindrical case 6 that fits into the case 1 and has a different inner diameter is provided on the right side of the case 1. A first valve rod 9 having a first valve packing 6 at its tip is provided inside the cylindrical case 5 . The other end of the valve stem 9 is a spring guide and an L-shaped wall extending inward from the outer periphery, and is extendably engaged with a rod 8 having a claw portion that also serves as a spring guide via a coil spring 7. ing. This valve stem 9 is always urged in the opposite direction to the valve seat by a coil spring 11 via a rod 8 and a frame 10.
4 is adapted to be interlocked with the pushbutton switch 12. Note that 18 is a push button switch 1 having a heart-shaped cam.
This is the second latch mechanism.

13 is a filter installed in the valve chamber B, 14 is a retaining ring, and 16.16 is a rubber packing for keeping the valve chamber airtight.

Next, the operating principle of the push-button valve operating device composed of the above-mentioned parts will be explained.

When the negative pressure of the intake manifold is guided to the inflow passage G and the push button switch shown in FIG. In addition, since the valve packing 6 of the valve stem 9 is separated from the valve seat by the coil spring 11 of the rod 8, the inflow passage G, the communication hole C, and the outflow passage F communicate with each other to create a negative pressure, and the vacuum diaphragm etc. is activated.

At this time, negative pressure from the intake manifold is applied to the valve chamber, and the valve stem 9. An attempt is made to pull the rod 8, but the load on the coil spring 11 is so large that it does not move and remains in this state.

Next, operate the push button switch as shown in Figure 2 to turn it ON (
(locked) is explained below.

When the push button switch is pushed in with an operating force greater than the load of the coil spring 11, the valve stem 9 first moves and the valve seal 6 comes into contact with the valve stem 4. As the valve is pushed in further, the valve stem 4 moves and the valve seal 2 separates from the valve seat E, and the atmosphere flows in from the valve chamber B, and the communication hole C and outflow passage F, which are constantly under load, become atmospheric pressure. When pushed in further, the valve gasket 6 is urged toward the valve seat, the inflow passage G and the communication hole C are cut off, only the valve chamber M becomes negative pressure, and the communication hole C, the outflow passage F, and the valve chamber B are communicated with each other. The pressure becomes atmospheric, and the vacuum diaphragm, etc. that was in operation returns to the release position. As it is pushed in further, the claw part of the rod 8 separates from the L-shaped hook part of the valve stem 9, resulting in an overstroke state. When the load is removed from the pushbutton switch 12, the rod of the pushbutton switch 12 moves. Keep this state slightly until the return lock is complete.

Next, in order to turn off the pushbutton switch 12, apply a load to the rod of the pushbutton switch again, push it in, and then remove the load with the above-mentioned overstroke applied, and the reverse operation state described above will be sequentially reproduced and the original state will be reproduced. Return to operation 1
The cycle is complete.

Effects of the Invention As is clear from the above embodiments, even if the stroke of the first valve stem by the push button switch is small, the present invention can operate reliably and require a very small operating force. Therefore, short strokes and light operating force are required when interlocking with multiple switches such as heater panel switches in automobiles, but the push-button valve operating device of the present invention is extremely effective and easy to operate. This can be done reliably and has great effects.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention in which the pushbutton switch is OFF.
FIG. 3 is a cross-sectional view showing the state (at the time of release). FIG. 2 is a cross-sectional view showing the push button switch according to an embodiment of the present invention in the ON state (when turned on). FIG. 3 is a plan view showing a conventional example, and FIG. 4 is a cross-sectional view thereof. 1...Case, 2...Second valve pack/,
3...Coil spring, 4...Second valve stem, 6...
...Case, 6...First valve gasket, 7...
...Coil spring, 8...Rod, 9...1st
Valve stem, 10...Frame, 11...Coil spring, 12...Push button switch, A...First valve chamber, B...Second valve chamber, C ...Communication hole, D
...Valve seat, E...Valve seat, F...Outflow passage, G...Inflow passage. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
Case H-Coil Spring 2-Kijime de-Gin 12-1-7 Ko Hotansui 7+3, =, Coil Spring A-Valve! 4- Sheep: + B - square room 5 - -1 '7 -
zu C-'JL A &6- Benno f
-tmon D, -goya 7- coil spring E
-Ben, Ken 8 -1 Rotsu F
F-y Song Dynasty, Exit K5 No. 1 Figure 7-
Senminato 5-: 几入逅洛IO-,,Frame 2nd diagram λ0 2', 3'

Claims (1)

[Claims] A cylindrical case having a partition inside is provided, first and second valve chambers are provided on both sides of the partition of the case, and these first and second valve chambers are connected to a communication hole passing through the partition. At the same time, valve seats protruding into the valve chamber are formed on both sides of the communication hole, an outflow passage to the side is connected to the communication hole, and an inflow passage is connected to the first valve chamber. A second valve rod, the tip of which is connected to a second valve packing biased by a second spring to a valve seat in the second valve chamber, is inserted into the communication hole. The other end of the second valve stem projects into the first valve chamber, a first valve packing is provided corresponding to the protrusion of the second valve stem, and a first valve packing is provided in the first valve packing. A pushbutton is connected to a pushbutton switch via a rod, the first valve stem is biased in a direction opposite to the valve seat by a first spring, and a latch mechanism is engaged with the pushbutton switch. type valve operating device.