JPH0543342Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention enables the manual lever of a manual switching spool valve, which is mainly used for driving hydraulic or pneumatic cylinders, to be used for switching operations of other equipment. The present invention relates to a multipurpose switching device.

(Prior art and its problems) In general, manual switching spool valves have a built-in spool that switches the port flow path by axial displacement, and a manual lever is attached to a plunger connected or integrated with this spool. They are connected to each other, and are configured to perform the flow path switching by tilting the manual lever.

By the way, in various machine tools equipped with hydraulic or pneumatic cylinders that are driven and operated by the spool valves mentioned above, for example, tools or workpieces can be moved in one direction while being operated in another direction, or in different directions. When the above-mentioned cylinder is being driven, other cylinders may be connected to each other to cause complex movements such as diagonal movement, or to drive a tool during a workpiece movement operation, or to perform multiple machining operations at the same time. There are many cases in which equipment such as equipment is operated continuously or intermittently. For this reason, conventionally,
In order to simultaneously operate the manual lever and other equipment switching tools, it requires a high degree of skill or multiple workers, and to avoid this, a complicated automatic control mechanism is provided. The problem was that the equipment cost was extremely high.

This invention was devised in view of the above circumstances, and is a multi-purpose valve switching device with a simple structure that allows the manual lever of the spool valve to be shared for switching operation of other devices, making it extremely easy to operate multiple actuators at the same time. is intended to provide.

(Means for Solving the Problem) In order to achieve the above object, the multipurpose valve switching device according to this invention has a lower piece 5 of a manual lever 4 consisting of two upper and lower pieces on the plunger 2 of the spool valve 1. The spool of the valve 1 is pivotally connected so that it can be displaced by tilting, and the upper piece 5 is pivotally connected to the upper end of the lower piece 6 so as to be tiltable in a plane orthogonal to the tilting rotation plane of the lower piece 6. Columnar wings 8 are fixed to the upper piece 5 in a substantially cross shape along the tilting direction of the lower piece 6, and the approach of the columnar wings 8 is detected on both sides of the upper piece 5 in the tilting direction. A sensor 14 that performs a switching operation of a device 18 of
a, 14b are arranged, and the neutral position return spring 1 holds the manual lever 4 in a straight line under non-tilting operation of the upper piece 5 at the pivot joint 4a of the upper and lower pieces 5 and 6.
2 and 12 are attached.

(Example) This invention will be explained below based on the illustrated example. Note that the left, right, front and rear directions below are based on FIG. 1.

In FIGS. 1 and 2, 1 is a spool valve, from one end of which a plunger 2 that can move forward and backward in the left and right horizontal directions protrudes, and a bifurcated mounting piece 3 integrally projects directly below the plunger 2. It is set up.

Reference numeral 4 denotes a manual lever consisting of an upper piece 5 having a substantially round shaft shape and a lower piece 6 having a prismatic outer shape and a substantially downward U-shape. This upper piece 5 has a spherical grip 7 fixed to its upper end, and a tapered part 5b at its lower end than the upper round shaft part 5a.
A bifurcated connecting portion 5c having a prismatic external appearance is formed, and a prismatic contact blade 8 is fitted in the central portion of the taper portion 5b in a horizontal state along the left-right direction. and round shaft part 5a
It is fixed unrotatably between the presser piece 9 screwed to. Thus, the upper piece 5 and the lower piece 6 are connected in the front-rear direction via the pivot pin 10a with the protruding piece 6a integrally formed at the upper end of the lower piece 6 fitted into the bifurcated connecting part 5c of the upper piece 5. They are pivotally connected to each other for rotation. The lower piece 6 also has a plunger 2 in an intermediate position relative to the spool valve 1.
The connecting piece 11 is pivotally connected to the flat end portion 2a by a pivot pin 10b, and at the lower end position.
It is pivotally connected to the main body via pivot pins 10c and 10d, and can be tilted left and right. That is,
The tilting rotational plane of the lower piece 6 with respect to the spool valve 1 and the tilting rotational plane of the upper piece 5 with respect to the lower piece 6 are set to be orthogonal, that is, in a vertical plane with a phase difference of 90°. Furthermore, this manual lever 4 has a pivot connection portion 4 of the upper and lower pieces 5 and 6.
Neutral position return springs 12, 12 made of leaf spring material are attached to the upper and lower pieces 5, 6, respectively, on both the front and rear sides of a.
It is attached on the upper piece 5 side with screws 13, 13 so as to be in contact with each other.

On the other hand, limit switches 14a and 14b are disposed on both the front and rear sides of the manual lever 4, respectively, at positions facing the side surface of the contact blade 8 and spaced a certain distance from the side surface.

For the multi-purpose valve switching device with the above configuration,
By tilting the manual lever 4 in the left and right direction as shown by the dashed line in the first figure, the spool valve 1 is
By tilting the limit switches 14a, 14b in the front and back direction against the return springs 12, 12 as shown by the dashed line in the second figure, one of the limit switches 14a, 14b can be brought into contact with the contact blade 8. It can be turned on by the spool valve and the limit switch 14a or 14b. The operating parts can be switched and operated at the same time. Further, since the return springs 12, 12 are present in the pivot joints 4c of the upper and lower pieces 5, 6, by weakening the tilting force in the front and rear direction or releasing the manual lever 4, the lever 4 can be moved in both directions. The limit switches 14a and 14b are automatically returned to the neutral state in which they are turned off.

FIG. 3 shows an example of application of this invention, in which a slide table 16 to which a tool 15 is attached is mounted on a slide table 17 that moves in a direction perpendicular to the slide table 16, and a hydraulic cylinder is used to drive the slide table 16.
C ₁ is connected to ABR connection type 4 port 3 position switching spool valve 1, and cylinder C ₂ that drives slide table 17 is connected to closed center type 4 port 3.
It is connected to the position switching electromagnetic valve 18, and electrically connected so that solenoids S ₁ and S ₂ at both ends of the electromagnetic valve 18 are actuated by limit switches 14a and 14b, respectively.

In this case, the spool of the spool valve 1 is pushed in by tilting the manual lever 4 to the right, and the slide base 16 moves backward by connecting the A-R and B-P ports, and conversely, by tilting to the left, the spool of the spool valve 1 is pushed in. is pulled out and moves forward when connected to ports A-P and B-R, and when the manual lever 4 is at an intermediate position in the left-right direction, the spool becomes a neutral position and stopped when connected to ports A-BR. On the other hand, the slide table 17 is
The limit switch 14a is turned on by forward tilting of the manual lever 4, and the solenoid valve 18 is turned on between A-P and B-.
Since the port R is connected, the limit switch 14b is turned on by tilting. Stops at an intermediate position in the direction. Therefore, both slide stands 16, 17
It is possible to simultaneously drive the tool 15 to move the tool 15 forward and backward at an arbitrary angle, or to sequentially displace the machining position by driving one at a constant speed and operating the other intermittently.

In addition, in this invention, in addition to contact-type sensors such as the limit switches 14a and 14b, the sensors for switching the operation by the forward and backward tilting of the manual lever 4 are used to optically or magnetically control the manual lever 4.
It is also possible to use a non-contact sensor that detects the approach of. However, the devices whose operation is switched using these sensors include a wide range of devices, including various hydraulic or pneumatic valves, electric motors, various electrical/electronic devices, and optical devices. . Further, the sensors on both sides may be used as operating switches for separate devices. Furthermore, the type of spool valve 1 is not limited to the illustrated example.

(Effect unique to the invention) According to the multipurpose valve switching device according to this invention, columnar wings are fixed to the upper part of the manual lever in a substantially cross shape along the tilting direction of the lower part, so that both the upper and lower parts can be operated at the same time. Even when tilted, the tilting of the upper piece can be detected by a sensor through the columnar blades, so just by operating one manual lever, you can operate the spool valve and other devices at the same time. be able to.

Therefore, for example, in a machine tool, etc., tools or workpieces are moved continuously or intermittently in complex directions including diagonal directions, one movement is performed while the other is driven, or multiple processes are performed simultaneously. Complicated operations that conventionally required a high degree of skill or required the adoption of an expensive control mechanism can be easily performed by a single operator.

In addition, sensors are installed on both sides of the upper piece in the tilting direction to detect the approach of the columnar blades and switch other devices, and since both sensors output two detection signals, one Compared to conventional devices that output only one detection signal, other devices can be operated in a more complex manner.

In addition, a neutral position return spring is attached to the pivot joint of the upper and lower pieces to hold the manual lever in a straight line when the upper piece is not tilted, so you can easily release the manual lever without any damage to other equipment. It can be automatically returned to the neutral position for operation, providing excellent operation reliability and speed.

Furthermore, since it is extremely simple in structure, it has the advantage of requiring less equipment cost and less risk of failure.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the multi-purpose valve switching device of this invention, FIG. 2 is a left side view of the same, and FIG. 3 is a hydraulic circuit diagram showing an example of application of this invention. 1...Spool valve, 2...Plunger,
4...Manual lever, 4a...Pivotal connection part, 5...
Upper piece, 6... Lower piece, 8... Contact wing (columnar wing),
12... Neutral position return spring, 14... Limit switch (sensor), 18... Solenoid valve (other equipment).

Claims (1)

[Scope of utility model registration request] A lower piece of a manual lever consisting of upper and lower pieces is pivotally connected to the plunger of the spool valve so that the spool of the valve can be displaced by its tilting, and the upper piece is connected to the upper end of the lower piece by tilting rotation of the lower piece. The upper piece is pivotally connected to be tiltable in a plane orthogonal to the plane, and columnar wings are fixed to the upper piece in a substantially cross shape along the tilting direction of the lower piece, and the above-mentioned pillar wings are fixed to the upper piece in a substantially cross shape along the tilting direction of the upper piece. A sensor is installed to detect the approach of the columnar wing and switch other equipment, and the pivot joint of the upper and lower pieces has a neutral position where the manual lever is held in a straight line when the upper piece is not tilted. A multipurpose valve switching device equipped with a return spring.