JPH034002A - Oscillation unit using elastic contractor - Google Patents

Abstract

PURPOSE:To realize easy handling of an oscillation unit by placing elastic contractors, which are transformed expansively in the diametral direction and contractively in the axial direction by the supply of pressurized fluid between a fixed plate and a movable plate, located in parallel and also placing an elastic member between them to oppose the contraction force. CONSTITUTION:Elastic contractors 16, which are expansion-transformed in dia. by the supply of pressurized fluid to generate a contraction force in the axial direction, are placed between a pair of fixed plate 12 and movable plate 14, spaced in parallel. Also, an elastic spring 40, which provides an elastic force to oppose the contraction force of the elastic contractors 16, is placed between the fixed plate 12 and the movable plate 14. Accordingly, when any of the elastic contractors 16 are contracted by the supply of the pressurized fluid, the other contractors 16 are kept in an original state and so the movable plate 14 is inclined to the contracted contractor 16 against the compressed spring. the feed and discharge of the pressurized fluid are therefore performed as necessary to allow the oscillation of the movable plate 14.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention uses a so-called air bag type elastic contracting body that expands and deforms in diameter by supplying and discharging pressurized fluid and generates a contractile force in the axial direction. This relates to a swing unit.

(Prior Art) It is necessary to tilt the work table, lighting equipment, and even measuring instruments as required to perform work efficiently and to provide useful contrast. It is also known from experience.

For this reason, in the prior art, the workbench is supported, for example, via a suitable link mechanism, and the crank that constitutes the link mechanism is translated using an electric motor connected via a speed reduction mechanism. Or, it was rotated to swing the lever and, by extension, the workbench connected to it.

Another device uses a hydraulic motor instead of an electric motor, or even uses a hydraulic cylinder directly connected to the workbench to tilt the workbench.

(Problems to be Solved by the Invention) However, conventional devices, such as those using electric motors, require a speed reduction mechanism, which means that they are heavy and occupy a large space, and on the other hand, sparks are not generated. Since this is unavoidable, there is also the problem that its use in explosive atmospheres is restricted.

On the other hand, with hydraulic motors or hydraulic cylinders, it is difficult to completely prevent leakage of hydraulic oil, so contamination of the surrounding area is unavoidable, and they must be used in a clean working environment. In addition, the temperature of the hydraulic oil,
There are many problems that need to be solved from a management perspective, such as the need to carefully manage cleanliness.

The present invention has been made in view of these problems, and an object of the present invention is to provide a small, lightweight rocking unit that is easy to handle and free from environmental pollution.

(Means for Achieving the Object) In order to achieve this object, the rocking unit of the present invention includes a pair of fixed plates and a movable plate arranged apart from each other, and a pair of the fixed plate and the movable plate. At least two parts are disposed in between, one end is fixed to the fixed plate, and the other end is rotatably connected to the movable plate, and expands and deforms in diameter when supplied with pressurized fluid to generate a contraction force in the axial direction. A set of elastic contraction bodies in a book,
The elastic member is disposed between the fixed plate and the movable plate and provides an elastic force that counteracts the contraction force of the elastic contraction body.

(Function) According to this rocking unit, by supplying pressurized fluid to one of the elastic contracting bodies, the elastic contracting body resists the elastic member disposed between the fixed plate and the movable plate. While contracting, the other elastic contracting bodies are maintained in their initial state, so the movable plate
It will be inclined toward the contracted elastic contracting body side. Therefore, by appropriately supplying and discharging pressurized fluid to each elastic contractile body, it is possible to freely impart rocking motion to the movable plate.

Furthermore, if the rod member is fixed upright on the fixed plate and the movable plate is swingably supported on the free end side of the rod member via a suitable bearing member, the movable plate can move in the lateral direction of the device. The force opposing movement is large, and therefore the device can have high lateral rigidity.

Furthermore, by attaching a locking part having a conical surface to the support rod so that the movable plate can come into contact with the conical surface at its maximum inclination position, the pressure of the pressurized fluid applied to the elastic contracting body can be increased. Even if the movable plate is in stable contact with the conical surface, the rigidity of the entire device can be significantly increased.

In addition, the elastic contractile body arranged between the fixed plate and the movable plate is
Since the vibrations acting on these plate members can be attenuated, the swing unit can be used even in a vibrating environment.

(Embodiments) Hereinafter, preferred embodiments of the swing unit of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram schematically showing a swinging unit 10 according to the present invention, in which a pair of fixed plates 12 and a movable plate 14, each having a disk shape and spaced apart from each other and substantially parallel to each other, are shown. , made of a rigid material capable of sufficiently resisting the applied bending force, such as metal or engineering plastic, and between these plate members is a set of three elastic contracting bodies 16.
are arranged parallel to each other and spaced apart.

As is clear from FIG. 1(b), which shows a part of the elastic contractile body 16 in cross section, these elastic contractile bodies 16 are tubular bodies made of rubber or synthetic resin that can hold pressurized fluid without permeating it. The outer periphery of the structure is reinforced by braiding organic or inorganic high tensile strength fibers, such as aromatic polyamide fibers (Kevlar: trade name), twisted bundles of filaments such as ultra-fine metal wires, or non-twisted bundles. At the same time, the openings at both ends of the tubular body 18 and the reinforcing structure 20 are closed with a closing member 22, and further sealed from the outside using a caulking ring 24.

Then, the first v of the reinforcing structure 20 is applied to the internal space 28 of the reinforcing structure 20 through the fitting 26 attached to the supply/discharge hole formed in at least one of the closing members.
From the IkM set angle θ, the so-called rest angle (54°44')
expansion, i.e. the tubular body 18 due to pantograph movement.
This is due to the expansion diameter and the resulting contraction in the axial direction.

In this embodiment, a screw hole 22a is formed in the end face of one of the closing members 22 of the elastic contracting bodies 16, that is, the closing member in which the supply/discharge hole is formed, and is clearly shown in FIG. 1(a). As described above, the elastic contractile body 16 can be fixed to the fixing plate 12 by screwing into the set screw 32 inserted through the through hole 30 formed in the fixing plate 12.

On the other hand, a through hole 22b is formed in the other closing member of the elastic contracting body, and a bracket 34 is attached to the movable plate 14 in correspondence with the through hole 30 formed in the fixed plate 12. A support bin 36 attached to is inserted,
The elastic contraction body 16 is rotatably supported. In addition, in this embodiment, in order to prevent the support pin 36 from being pulled out and falling from the through hole 22b formed in the closing member, a locking pin is attached to each protruding portion of the support pin 36 that passes through the bracket 34. Attach 38 to each.

On the other hand, a compression spring 40 as an elastic member is disposed between the fixed plate 12 and the movable plate 14 so as to surround the elastic contracting body. The movable plate 14 is compressively deformed by the contraction of the elastic member 16, and returns elastically as the contractile force is reduced by discharging the pressurized fluid from the elastic contractile body, thereby functioning to bring the movable plate 14 to the initial position.

In this example, a single compression spring was used, but a plurality of springs may also be used, and a structure in which the plurality of springs are arranged on a head defined by an elastic contracting body may also be used. good.

Furthermore, although both ends of the compression spring 40 are integrally fixed to each of the fixed plate and the movable plate, both ends are brought into contact with these plate members by applying an initial setting pressure to the elastic contracting body. Furthermore, the ends of the compression springs may be screwed into spiral housing grooves formed in protrusions of the fixed plate and the movable plate that protrude in the axial direction and face each other.

Next, the operation of the swing unit shown in FIG. 1 will be explained.

In the swing unit, in an initial setting state, a pressurized fluid having a predetermined pressure is applied to each elastic contracting member 16 in advance, and the movable plate 14 takes a substantially parallel state to the fixed plate 12.

It should be noted here that by setting the initial pressure higher or lower, the initial contraction force generated in each elastic contraction body can be changed, and the rigidity of the elastic contraction body can be adjusted arbitrarily. This means that the rigidity of the swing unit can be set freely.

If you want the movable plate 14 to perform a desired rocking motion, for example, to swing the movable plate 14 in the direction indicated by arrow A in FIG. Further supply of pressurized fluid.

Then, the elastic contractile body to which the pressurized fluid is supplied further contracts against the compression spring 40, and the other elastic contractile bodies to which the pressurized fluid is not supplied are maintained at the initial position, and as a result, the movable plate 1
4 is inclined in the direction shown by arrow A. Therefore, the inclination of the movable plate 14 can be freely set by appropriately adjusting the supply amount of pressurized fluid applied to each elastic contractile body. Note that the return of the movable plate 14 to the initial position is achieved by reducing the contractile force of the elastic contracting body as the pressurized fluid is discharged from the elastic contracting body to which the pressurized fluid has been applied, and by reducing the contraction force of the elastic contracting body to which the pressurized fluid is applied.
This is brought about by the elastic return force of

Of course, even in this case, the state of the swinging motion of the movable plate can be freely adjusted by changing the elastic contractile body to which the pressurized fluid is applied.

FIG. 2 is a diagram showing another embodiment of the present invention. In this embodiment, a rod member 42 is provided upright on the fixed plate 12, and one end of the rod member 42 is provided. The movable plate 14 is swingably supported via, for example, a spherical bearing 44 fixed to the section.

In this embodiment, for the sake of simplicity, only - elastic contraction bodies 16 are shown, but it is assumed that a plurality of elastic contraction bodies are used, and a compression spring 40 is arranged between the fixed plate and the movable plate. Of course, it will be established.

According to such a device, the fixed plate 12 and the movable plate 14 are connected via the rod member 42, so that the plate members are substantially connected by the elastic contractile body and the compression spring as shown in FIG. Compared to other devices, the rigidity in the direction perpendicular to the axis of the device is higher, and the movable plate 14 can swing more smoothly.

Furthermore, a locking part 42a having a conical surface is provided in the middle of the rod member 42, and the movable plate 14 is fixed at the maximum inclination position of the movable plate 14.
4 is preferably arranged so that it can make line contact with the conical surface.

With this configuration, even if the pressure of the pressurized fluid applied to each elastic contraction body is increased, the movable plate can be stably brought into contact with the conical surface, significantly increasing the rigidity of the entire device. can do.

In another embodiment of the present invention shown in FIG.
In the middle of the rod member 42, similar to the embodiment shown in FIG.
In addition to providing the locking portion 42a having a conical surface,
The rod member 42 is connected to the spherical bearing 44 via the sliding bearing 46.
It is supported so that it can slide freely.

According to this embodiment, it is possible to impart not only a swinging motion to the movable plate 14, but also a sliding motion of the movable plate 14 along the rod member 42, thereby setting a large degree of freedom for the movable plate. can do.

Further, the contractile force of the elastic contractile body 16 is applied to the compression spring 4 as an elastic member until the movable plate 14 comes into contact with the locking portion 42a.
0, but as the pressurized fluid is further supplied to the elastic contractile body, the movable plate 14 is moved to the locking portion 42a.
After the movable plate 14 comes into contact with the rod member 42, the movement of the movable plate 14 along the rod member 42 is restricted, and the swinging movement of the movable plate 14 is a movement using the compression spring 40 and the edge of the locking part 42a as a fulcrum. It becomes a device with a large resistance to that movement.

By configuring the movable plate 14 to be in line contact with the conical surface when the movable plate 14 assumes the maximum inclination position,
Since the movable plate can be held stably, the pressure of the applied pressurized fluid can be set high, and as a result, the rigidity of the entire device can be significantly increased. Therefore, the stiffness of the device can be adjusted over a wide range by changing the stiffness as a result of changing the pressure of the pressurized fluid applied to the elastic contractile body.

Note that the present invention is not limited to these examples,
Various modifications are possible within the scope of the claims.

(Effects of the Invention) As detailed above, according to the device of the present invention, elastic contracting bodies that can efficiently convert the energy of pressurized fluid into kinetic energy are used as actuators, and pressure is applied to each elastic contracting body. By controlling the supply and discharge of fluid, the desired rocking motion is imparted to the movable plate, and by adjusting the set pressure of the pressurized fluid applied to the elastic contractile body, the rigidity can be freely changed. Because it can be used, it has a wide range of application.
Furthermore, it is possible to provide a swinging unit-nod that is lighter in weight than known devices, does not contaminate the working environment, and is easy to handle.

In addition, this device, which combines an elastic contractile body to which pressurized fluid is applied and a compression spring, also has the function of a damper, so it can be used even in vibration environments, and has many advantages. have.

[Brief explanation of drawings]

FIG. 1(a) is a front view schematically showing a rocking unit of the present invention, and FIG. 1(b) shows an elastic contractile body suitable for use in the unit shown in FIG. 1(a). Figure 1 (c) showing a partially broken view
FIG. 2 is a perspective view showing another embodiment of the present invention with some parts omitted, and FIG. It is a figure which shows the support structure of the movable plate in the Example. 10-Swinging unit 12...-Fixed plate 14--Movable plate 16...-Elastic contraction body 18
- Tubular body 20 - Reinforcement structure 22 - Closing member 30 - Through hole 32 - Set screw
34...Mounting with bracket 4〇-compression spring
42... Rod member 44-・Spherical bearing 46・
...Sliding bearing Fig. 1 a) Fig. 2 2 Fig. 3 6

Claims (1)

[Scope of Claims] 1. A pair of fixed plates and a movable plate arranged at a distance from each other, and a pair of fixed plates and a movable plate arranged between the fixed plate and the movable plate, one end of which is fixed to the fixed plate and the other end of the fixed plate and the movable plate. a set of at least two elastic contracting bodies, which are rotatably connected to a movable plate and expand and deform in diameter when supplied with pressurized fluid to generate a contractile force in the axial direction;
1. A rocking unit using an elastic contracting body, comprising an elastic member disposed between a fixed plate and a movable plate and applying an elastic force to counteract the contraction force of the elastic contraction body. 2. The fixed plate includes a rod member having one end fixed to the fixed plate, and the rod member has a bearing member at the other end that supports the movable plate at least in a swingable manner. A rocking unit using an elastic contractile body.