JP2584662Y2 - Diaphragm device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a diaphragm device, and in particular, to pressure from both upper and lower directions, respectively.
It relates to a diaphragm that is propelled downward and upward .

[0002]

[Prior art and its problems] Conventionally, from both upper and lower directions
Thrust is taken out in both downward and upward directions for pressure
Various types of diaphragm devices have been devised, and, for example, those shown in FIGS. 4 and 5 are generally known.

That is, in the diaphragm device shown in FIG. 4, a peripheral portion of a so-called flat type diaphragm 21 is clamped and fixed to a fixed body 25 side such as a housing.
A pair of center plates 3 is provided at the center of the diaphragm 21.
A moving body 31, such as a rod, is attached via 0, 30. The diaphragm 21 is displaced in accordance with the applied pressure, and the moving body 31 moves following the displacement of the diaphragm 21. A desired thrust can be taken out by moving the body 31.

In the diaphragm device shown in FIG. 5, a so-called convolution type diaphragm 41 is sandwiched and fixed to a fixed body 45 side such as a housing, and a pair of center plates 50, 50 are provided at the center of the diaphragm 41. A moving body 51 such as a rod is attached via the
1 is displaced, and the moving body 51 moves following the displacement of the diaphragm 41, so that a desired thrust can be taken out by the movement of the moving body 51.

However, in the diaphragm device shown in FIG. 4, since the diaphragm 21 is formed flat, there is no danger of the diaphragm 21 being inverted when a pressure is applied, but the displacement of the diaphragm 21 can be increased. Therefore, the stroke of the moving body 31 cannot be increased.

[0006] Further, in the diaphragm device shown in FIG. 5, it is possible to increase the displacement of the diaphragm 41, although it is possible to increase the stroke of the moving body 51, when the pressure acting from the upper direction Diaphragm 41
Therefore, as shown in FIG. 6, it is necessary to reduce the width of the convolution to increase the rigidity or to increase the thickness of the diaphragm 41 itself to prevent the diaphragm 41 from being inverted. Therefore, the responsiveness and the followability are reduced, and when the diaphragm 41 is displaced, a large stress acts on the surface side, and the durability is reduced.

[0007] The present invention is to solve the above-mentioned problems of the prior art, and to provide a diaphragm device which can take a large stroke without impairing responsiveness, followability and durability. It is intended for.

[0008]

[Means for Solving the Problems] To solve the above problems, the present invention provides a diaphragm and a diaphragm.
Moving body attached to the center and the periphery of the diaphragm
The fixed body where the part is fixed and the displacement of the diaphragm (moving body
In die <br/> Fulham device with a stopper member for restricting the movement amount) of the pressure receiving portion of the diaphragm, strange
Outer convolution that protrudes in one direction
And an inner convolution projecting in the other direction of the displacement is provided continuously, and the stopper member is provided.
When the diaphragm is displaced to one side,
Closely contact the concave side of the inner convolution
Set the inner guide to hold the convolution
The diaphragm is displaced to the other side by the fixed body.
Sometimes, the outer convolution is
Outer to wear and hold outer convolution
A means provided with a guide portion is employed.

[0009]

According to the present invention, by adopting the above-mentioned means, the pressure receiving portion of the diaphragm is provided with an outer convolution projecting to one side and an inner convolution projecting to the other side. Can be increased, and the stroke of the moving body can be increased. Also, by providing an outer guide portion that holds the outer convolution in close contact and an inner guide portion that holds the inner convolution in close contact, when the diaphragm is displaced, each convolution is Held by close contact,
Reversal will be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below. 1 to 3 show an embodiment of the diaphragm device according to the present invention. FIG. 1 is a cross-sectional view showing the whole, and is a cross-sectional view showing a normal state, FIG. 2 and FIG.
FIG. 3 is a cross-sectional view showing a state where pressure is applied.

That is, the diaphragm device includes a so-called convolution type diaphragm 1, a moving body 11 such as a rod attached to the center of the diaphragm 1, and a fixed body such as a housing to which the peripheral edge of the diaphragm 1 is fixed. 5, a stopper member 12 for limiting the displacement of the diaphragm 1, that is, the movement amount of the moving body 11,
An outer guide 9 and an inner guide 15 for preventing the diaphragm 1 from being inverted are provided.

The diaphragm 1 forms a thin corrugated plate and has a thick rib 2 around its entire outer periphery.
An outer convolution 3 having a semicircular cross section protruding upward in the drawing over the entire circumference is integrally formed on the inner peripheral portion of the rib 2. An inner convolution 4 having a semicircular cross section projecting in the direction opposite to the outer convolution 3 over the entire circumference is integrally formed on the inner portion of the convolution 3.

The fixed body 5 includes an upper member 6 and a lower member 7.
An annular groove 8 is formed in the upper surface of the lower member 7, and the rib 2 of the diaphragm 1 is mounted in the groove 8. The periphery of the diaphragm 1 is fixed between the upper member 6 and the lower member 7.

An outer guide 9 projecting upward in the drawing is formed integrally with the inside of the groove 8 of the lower member 7 over the entire circumference thereof. The surface 9a of the outer guide 9 is The concave surface 3a side of the outer convolution 3 of the diaphragm 1 is formed into a curved surface that can match. That is, the concave surface 3 of the outer convolution 3
The radius of curvature on the side a and the radius of curvature of the surface 9a of the outer guide portion 9 are set to substantially the same value.

The central portion 1a of the diaphragm 1 is formed flat, and the central portion 1a is sandwiched between a pair of center plates 10, 10. The body 11 is adapted to be attached. Accordingly, the moving body 11 moves up and down in the figure following the displacement of the diaphragm 1.

The movable body 11 is movably inserted through a cylindrical stopper member 12 having an upper end fixed to a stationary body (not shown). The stopper member 12 prevents excessive propulsion in the vertical direction. The desired stroke
You can get a range .

At the lower end of the stopper member 12, there is integrally formed a flange portion 12a projecting radially outward in a ring shape, and an inner guide 13 is formed on the outer peripheral surface of the stopper member 12 in the vertical direction. Is provided so as to be movable.

The inner guide 13 includes a main body 14 having a cylindrical shape, a flange 14 a integrally provided at an upper end of the main body 14, and protruding annularly inward in a radial direction, and a main body 14.
A protruding portion 14b which is provided integrally with the lower end portion and which protrudes annularly outward in the radial direction, and an annular inner guide portion 15 which is provided continuously with the protruding portion 14b and which protrudes downward in the figure and has a semicircular cross section. It is composed of

The inner diameter of the flange 14a is substantially the same as the outer diameter of the stopper member 12, and the inner diameter of the main body 14 is substantially the same as the outer diameter of the flange 12a of the stopper member 12. Therefore, when the inner guide 13 moves, the inner peripheral surface of the flange portion 14a of the inner guide 13 slides on the outer peripheral surface of the stopper member 12, and the inner peripheral surface of the main body portion 14 of the inner guide 13 moves. The surface slides on the outer peripheral surface of the flange 12 a of the stopper member 12. In this case, the downward movement of the inner guide 13 in the drawing
The lower surface side of a is abutted on the upper surface side of the flange portion 12a of the stopper member 12 so as to be restricted.

The surface (convex surface) of the inner guide portion 15
The radius of curvature of the inner convolution 4 is set to substantially the same value as the radius of curvature of the concave surface 4a of the inner convolution 4 of the diaphragm 1, so that the surface of the inner guide portion 15 in the normal state has the concave surface of the inner convolution 4. 4a.

The overhang portion 14b of the inner guide 13
A biasing member 16 is mounted on the upper surface of the inner guide 13. The inner guide 13 is normally urged downward in the drawing by the biasing force of the biasing member 16, and the lower surface of the flange portion 14 a is the stopper member. The abutment 12 is in contact with the upper surface of the flange 12a.

On the lower surface side of the center plate 10,
The urging member 17 is mounted, and by the urging force of the urging member 17, the center of the diaphragm 1 is urged upward in the figure integrally with the center plates 10 and 10 in the normal state, and the upper center The upper surface of the plate 10 is in contact with the lower surface of the overhang portion 14b of the inner guide 13. That is, in the normal state, the biasing member 16 of the inner convolution 13 and the biasing member 17 of the center plate 10 are kept in an equilibrium state. This state is a normal state, that is, a state where no pressure is applied.

Next, the operation of the above-described device will be described. First, when pressure acts from the direction indicated by the arrow in FIG. 2, the diaphragm 1 is displaced downward in the figure by the pressure, and the concave surface 3 a (lower surface) of the outer convolution 3 of the diaphragm 1 faces the surface 9 a of the outer guide portion 9.
(Upper surface) side, and both are completely in close contact with each other, preventing the outer convolution 3 from being inverted downward in the figure. Further, the inner convolution 4 is displaced downward in the drawing against the urging force of the urging member 17 on the lower surface side of the center plate 10, and is attached to the center of the diaphragm 1 following the displacement of the inner convolution 4. The moving body 11 moves downward in the figure.

On the other hand, when pressure is applied from the direction indicated by the arrow in FIG. 3, the diaphragm 1 is displaced upward in the figure by the pressure, and the outer convolution 3 and the inner convolution 4 of the diaphragm 1 are integrated into the figure. Displace upward. In this case, the inner guide portion 15 moves upward in the figure following the displacement of the inner convolution 4 against the urging force of the urging member 16 on the upper surface thereof, but the lower surface side of the inner guide portion 15 Since the convolution 4 is in contact with the concave surface (upper surface) 4a and is kept in close contact with the convolution 4, the inner convolution 4 is prevented from being turned upward in the drawing. Then, the moving body 11 attached to the center of the diaphragm 1 moves upward in the figure following the displacement of the inner convolution 4 and the outer convolution 3.

As described above, in the diaphragm device according to this embodiment, since the pressure receiving portion of the diaphragm 1 is provided with the outer convolution 3 projecting to one side and the inner convolution 4 projecting to the other side, the diaphragm 1 Can be increased, and thereby the stroke of the moving body 11 can be increased.

When the diaphragm 1 is displaced, the outer convolution 3 is held in close contact with the outer guide 9 and the inner convolution 4
Is held in close contact by the inner guide portion 15, so that reversal of both convolutions is prevented.

Therefore, it is not necessary to increase the thickness of the diaphragm or to narrow the width of the convolution in order to prevent reversal as in the prior art, thereby improving responsiveness and followability. In addition, the stress acting on the surface side of the diaphragm can be reduced, so that the durability can be significantly improved.

In the above description, the peripheral portion of the diaphragm is fixed to the fixed body and the moving body is attached to the center of the diaphragm. However, the center of the diaphragm is fixed to the fixed body and the diaphragm is fixed to the fixed portion. You may use it like attaching a moving object, in this case,
The inner guide for preventing the reversal of the inner convolution is provided in a fixed state at the center portion of the diaphragm, and the outer guide for preventing the reversal of the outer convolution is provided movably at the peripheral edge of the diaphragm. .

[0029]

[Effect of invention] This invention is constructed as described above, the pressure receiving portion of the diaphragm, provided with outer convolution protruding one of the displacement directions, an inner convolution projecting in the other displacement direction in succession by the, Ri Do that it is possible to increase the displacement of the diaphragm, it is possible to increase the stroke of the moving body
Will be. In addition, the displacement of the diaphragm (movement of the moving body)
The diaphragm is one of the stopper members that limit the
When displaced toward the inner convolution,
Hold inner convolution in close contact with the surface
In addition to providing the inner guide, the fixed body
When the flam moves to the other, the outer convolution
Outer convolution closely attached to the concave side of the
The outer guide that holds the
Limiting the displacement of the diaphragm by the upper member
When the diaphragm is displaced to one side
Prevents the inner convolution from reversing
Outer convolution when the flam displaces to the other
This will prevent the reversal of the option. Therefore, it is not necessary to increase the thickness of the diaphragm to prevent inversion or to increase the rigidity by narrowing the width of the convolution. Since the stress at the time of performing the heat treatment can be reduced, the durability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the diaphragm device according to the present invention, which is a sectional view showing a normal state.

FIG. 2 is a cross-sectional view showing a state where pressure is applied.

FIG. 3 is a cross-sectional view showing a pressure action state.

FIG. 4 is a sectional view showing an example of a conventional diaphragm device.

FIG. 5 is a cross-sectional view showing another example of the conventional diaphragm device.

FIG. 6 is a sectional view showing another example of the conventional diaphragm device.

[Explanation of symbols]

 1, 21, 41 ... diaphragm 1a ... central part 2 ... rib 3 ... outer convolution 3a ... concave surface 4 ... inner convolution 4a ... concave surface 5, 25, 45 ... fixed body 6 ... upper side Member 7 Lower member 8 Groove 9 Outer guide 9a Surface 10, 30, 50 Center plate 11, 31, 51 Moving body 12 Stopper member 12a Flange 13 ... Inner guide 14... Main body 14a... Flange 14b.

Claims (1)

(57) [Scope of request for utility model registration] 1. A diaphragm and a central portion of the diaphragm
The moving body attached to the
Fixed body and diaphragm displacement (moving body
In the diaphragm device with a stopper member for restricting the amount), the pressure receiving portion of the diaphragm, the displacement direction
An outer convolution protruding one of the displacement
An inner convolution projecting direction of the other
While being provided continuously, the stopper member
When the diaphragm is displaced to one side, the inner co
The inner convolution is in close contact with the concave side of the convolution.
An inner guide section for holding the
When the diaphragm is displaced to the other,
Note that the outer convolution
A diaphragm device provided with an outer guide portion for holding a terconvolution .