JPH0140322Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a piston-type actuator that is used, for example, as a drive source for various valve devices and can be operated remotely automatically by supplying fluid pressure and manually operated in the event of a failure. In particular, the present invention relates to an improvement in the lock structure of a rotary handle for manual operation.

[Prior Art] As an operating mechanism for automatically and remotely controlling various controlled objects such as valve devices, a piston is slidably supported within a cylinder, and the cylinder is formed on both sides of the piston. Springless piston type actuators have traditionally been used to generate various types of driving force by converting the amount of air pressure into linear motion by reciprocating the fluid pressure, especially air pressure, selectively supplied to the chamber. Are known. These piston type actuators are smaller than the diaphragm type actuators that are generally used as the drive source for this type of valve device, and yet can provide a larger output and stroke amount. double port valves, blower vanes, variable resistors,
It can also be used as an operating device for other operating ends that require proportional position movement to achieve its effects.

By the way, in the above-mentioned piston type actuator, when a failure occurs on the air pressure supply side or when manual operation is required on the controlled object side, the piston in the cylinder is controlled by the internal fluid pressure. Regardless of the presence or absence, it is common practice to attach a manually operated rotary handle that can be moved by forcible manual operation to the outer end of a manually operated shaft that is fitted into the cylinder and connected to the piston. .

However, the above-mentioned rotary handle is unnecessary during automatic operation, which is the normal state of this type of actuator, and at this time, it is desirable to have a configuration that does not get in the way and prevent erroneous operation. It is necessary to provide the manual operation shaft with a configuration that allows immediate operation when manual operation is necessary, and no one has yet been proposed that can satisfy these contradictory demands.
That is, conventionally, a structure is generally known in which a so-called double nut method is adopted for the manual operation shaft protruding from the outside of the cylinder, but with such a structure, locking and releasing operations are troublesome.
In addition, some of them are subject to conditions such as requiring the use of tools, and in any case, there is a problem in terms of operability.

In addition, there is also known a handle in which the above-mentioned handle is locked on the fixed side using a wave-shaped washer, but such a structure lacks the locking force and poses a problem in preventing erroneous operation during automatic operation. It was something that caused.

[Summary of the idea]

The present invention was developed in view of these circumstances, and includes a cylinder in which one end of the piston is rotatably connected to the piston, a manual rotary handle is fixed to the outer end, and the outer periphery of the intermediate body of the cylinder is rotatably connected to the piston at one end. a manual operating shaft having a threaded portion; a cylindrical nut that is fitted on the outside of the manual operating shaft and has an inner peripheral threaded portion that is screwed onto the threaded portion; and that is selectively fixed at an arbitrary position with respect to the fixed side; at least two disc springs that are combined with the abutting portion between the cylindrical nut body and the rotary handle so that the outer periphery thereof is in close contact with the inner periphery part, and the outer periphery of the disc spring is gripped. Due to the simple structure of inserting a washer member integrally formed with a U-shaped metal fitting, the handle can be properly and reliably locked during automatic operation, and the handle can be easily locked during manual operation. It can be operated easily, appropriately, and quickly, and has various excellent practical effects, such as not causing any trouble in its operation. The present invention provides an inexpensive actuator handle lock structure.

[Example] Hereinafter, the present invention will be described in detail using an example shown in the drawings.

The drawing shows an embodiment of the piston-type actuator according to the present invention, and in the drawing,
First, to briefly explain its schematic configuration, the piston-type actuator, which is generally designated by the reference numeral 10, is
A cylinder 11 consisting of a cylindrical body 11A and a pair of upper and lower lids 11B and 11C that close both ends of the cylinder 11A.
and a piston 1 slidably disposed inside it.
2, and a rod 13 for transmitting the operating output to the outside is fixed to the center of the lower surface of the piston 12, and the other end extends to the outside through the lid 11C, the tip of which is not shown in the figure. The controller is configured to be connected to a controlled object. Desired air pressure is introduced into the chambers 14 and 15 on both sides of the piston 12 from the air pressure introduction holes 16 (one not shown) in the cylinder 11, and as a result, the piston 12
2 is moved up and down.

On the other hand, a manual operation shaft 17 is disposed so as to pass through the upper lid body 11B and face the inside of the cylinder 11.
The tip 17a thereof is rotatably connected to the piston 12 via bearings 18a and 18b. Also, the other end 17b of this manual operation shaft
A rotary handle 19 for manual operation is fixedly attached to the body, and a threaded portion 20 is formed on the outer periphery of the intermediate body. A cylindrical nut body 21 is fitted onto the outer periphery of the threaded portion 20 of this manual operation shaft 17, and is screwed onto the inner periphery threaded portion 21a. The manual operation shaft 17 and the cylindrical nut body 21 extend upward through a through hole 23a of a plate 23 fixed to the upper end of the cylinder 11 via the cylindrical body 22. . Further, the cylindrical body 22 may have any structure as long as it can support the plate 23 at a predetermined interval above the cylinder 11.
It can also be a simple support.

Furthermore, in the configuration described above, the cylinder 11
The internal threaded portion 21a is disposed on the outside of the
A tapered ring 25 is wound around the outer periphery of the cylindrical nut body 21 to which the manual operation shaft 17 is screwed. It is configured to be clamped and fixed in position.

That is, the cylindrical nut body 21 disposed around the manual operation shaft 17 described above is held in a loosely fitted state during automatic operation, and these pistons 12
In addition, during manual operation, the cylindrical nut body 21 is held between the taper rings 25 and only the manual operation shaft 17 is rotated. The piston 12 can be moved manually.
Here, the above-mentioned tapered ring 25 has an outer circumferential portion that is a tapered surface, and an inner circumferential portion that is a flat surface that is joined to the outer circumference of the cylindrical nut body 21, and a part of the circumferential direction is not shown in the drawing. It is not formed by cutting.

On the other hand, a threaded part 24a on the outer periphery of the lower cylindrical part of the lock nut shown at 24 in the figure is screwed into the threaded part 23b formed on the upper part of the plate 23, and the tapered ring 25 is attached to the inside of the tip part. A tapered surface 24b is formed to apply a tightening force from the outer periphery. It will be easily understood that the above-mentioned taper ring 25 is selectively compressed against the cylindrical nut body 21 depending on the screwing position of the lock nut 24.

Now, according to the present invention, in the piston-type actuator 10 having the above-described configuration, the abutting portion between the rotary handle 19 on the manual operation shaft 17 and the upper end of the cylindrical nut body 21 fitted around the outer periphery of this shaft 17 At least two disc springs 31 and 32 are combined so as to be in close contact with each other at their outer peripheries and separated from each other at their inner peripheries, and a U-shaped metal fitting 33 that grips the outside thereof.
It is characterized by interposing a washer member 30 which is integrally formed with the above.

That is, this washer member 30 locks and holds the handle 19 and the cylindrical nut body 21 in a connected state during automatic operation of the actuator 10.
As a result, during automatic operation, both members are moved together by their elastic force, and during manual operation, the handle 19 can be forced to be manually operated simply and quickly. In addition, in the configuration in which the disc springs 31 and 32 described above are combined, it is possible to easily obtain a more appropriate and reliable locking state than in the past, and its practical effects are great.

In particular, such a washer member 30 can be applied to the actuator 10 configured to be manually operated within the entire stroke range in which the piston 12 moves, as in the present embodiment, to exhibit its effects. It is something.

In the actuator 10 as described above, by releasing the locked state by the lock nut 24 and releasing the tightening of the taper ring 25, the piston 12 is automatically driven by the supplied air pressure, and the operation output is transferred to the controlled object. At this time, the manual operating shaft 17 with the handle 19 and the cylindrical nut body 21 are integrally driven reciprocally outside the cylinder 11 in accordance with the movement of the piston 12.

On the other hand, when driving as described above or when manual operation is required, by rotating the lock nut 24 and screwing it into the plate 23, the taper ring 25 tightens and fixes the cylindrical nut body 21 by the action of the taper surface described above. This makes it possible to rotate the manual operation shaft 17 using the handle 19 with respect to the cylindrical nut body 21 fixed on the stationary side, and as a result, the piston 12 is moved into the cylinder 11 by this manual operation. It can be moved freely. In particular, in this embodiment, since the taper ring 25 is tightened or loosened on the cylindrical nut body 21 by the lock nut 24, no matter where the cylindrical nut body 21 is located on the piston 12 in the axial direction, The device can be easily and properly locked, and the conventional problem of limiting the manual operation position can be solved.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part may be modified and changed as appropriate. For example, in the above-mentioned embodiment, a springless type was described as a piston type actuator, but the present invention is not limited to this, and can be easily applied to an actuator having a structure in which a spring is disposed on one side of the cylinder. will be easily understood.

[Effect of idea]

As explained above, according to the handle lock structure of the actuator according to the present invention, one end of the cylinder is rotatably connected to the piston, and a manually operated rotary handle is fixed to the outer end, and the manual rotation handle is fixed to the outer end of the cylinder. It has a manual operation shaft having a threaded part on the outer periphery of the body, and an inner peripheral threaded part fitted on the outside thereof and screwed into the threaded part, and is selectively fixed at any position with respect to the fixed side. a cylindrical nut body, and at least two disc springs that are combined with the abutment portion between the cylindrical nut body and the rotary handle so as to be in close contact with the outer periphery and separated from the inner periphery; and the outer side thereof. Since the washer member is integrated with the U-shaped metal fitting that grips the handle, the handle can be properly and reliably locked during automatic operation despite the simple and inexpensive structure. It is said that the handle can be operated easily and appropriately during manual operation, and that manual operation can be performed easily, appropriately, and quickly, and that there will be no hindrance to the operation. It has various excellent practical effects.

[Brief explanation of drawings]

The drawing is a schematic sectional view showing an embodiment of an actuator to which the handle lock structure according to the present invention is applied. 10... Piston type actuator, 11...
Cylinder, 12... Piston, 13... Operating force transmission rod, 14, 15... Cylinder chamber, 17...
Manual operation shaft, 19... Manual handle, 20... Outer circumference threaded portion, 21... Cylindrical nut body, 21a... Inner circumference threaded portion, 23... Plate, 24... Lock nut, 24b... Tapered surface, 25 ... Tapered ring, 25a ... Tapered surface, 30 ... Washer member, 3
1, 32... disc spring, 33... U-shaped metal fitting.

Claims (1)

[Scope of utility model registration request] One end of the piston is rotatably connected to the piston, which is slidably held within the cylinder, and a manual rotating handle is fixed to the other end pulled out of the cylinder, and a screw is attached to the outer periphery of the intermediate body. It has a manual operation shaft having a part formed thereon, and an inner circumferential threaded part that is fitted on the outside of the manual operation shaft outside the cylinder and is screwed into the threaded part of the manual operation shaft, and has a threaded part on the fixed side. a cylindrical nut body that is selectively fixed at any position, and an abutting portion between the cylindrical nut body and the rotation handle,
A washer member is interposed which is integrally constituted by at least two disc springs that are combined so as to be in close contact with each other at the outer periphery and separated from each other at the inner periphery, and a U-shaped metal fitting that grips the outside of the disc springs. The actuator handle lock structure is characterized by a