JPH037644Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an O-ring-shaped squeeze packing such as an O-ring.

O-ring-shaped squeeze packings such as O-rings are widely used for shaft packings, buffer rings, stationary gaskets, etc. of sealing parts.

By the way, such an O-ring-shaped squeeze gasket deteriorates over time and needs to be replaced, but since the gasket is endless, it is necessary to disassemble the main body of the device to install a new gasket. Normally, when replacing seal parts, you can replace them at the same time as disassembling the device, but
If only the gasket deteriorates, there is a problem in that large-scale work is required to dismantle the device just for the gasket. In addition, in recent years, mechanical seals have been introduced that do not require disassembly of the equipment when replacing the sealing ring by splitting the sealing sliding ring into two. Patsukin is not suitable.

To solve this problem, a gasket has been proposed in which one part of the endless shape is cut with a straight surface, bias surface, or step surface, but in this case, the sealing performance deteriorates and the cut surface tends to shift easily. The drawback was that it was difficult to center and butt each other, resulting in poor workability. In particular, in the case of squeeze gaskets, the gasket undergoes elastic deformation when it is installed, which tends to create gaps on the cut surface, resulting in a significant deterioration in sealing performance.

The present invention was made to improve the above-mentioned conventional drawbacks, and involves making a plurality of notches and cut surfaces in a portion of an end ring finished to a predetermined size to form protrusions and corresponding recesses. This prevents misalignment and leakage and facilitates the installation process.

Embodiments of the present invention will be described below based on the drawings. FIG. 1 shows an example in which the present invention is applied to an O-ring. The O-ring main body 1 is finished in advance to a predetermined size depending on the application location, and a cut surface α is formed at an arbitrary position to cut off the endless shape.

In the present invention, the structure is such that the material is cut to a predetermined size in advance because this improves the mounting accuracy and improves the sealing performance. In the case of an O-ring-shaped squeeze gasket such as an O-ring, there is adjustment of the tightening allowance and the spacing allowance, and it is necessary to finish it to predetermined dimensions in advance as in the present invention. Also, depending on where the O-ring main body 1 is used, the outer circumferential side a and inner circumferential side b may receive pressure and become a squeeze surface (sealing surface), or the front side x and back side y may receive pressure and become a squeeze surface (sealing surface). ). In this example, the front side x and the back side y
This shows the case where the surface becomes the squeeze surface (seal surface).

As shown in FIG. 2, the cut surface α has a cut surface 2 at the center of the outer circumferential side a of the ring body 1, which extends along the axis in the circumferential direction and penetrates to the inner circumferential side b.
An oblique half-cut surface 3 having a predetermined angle with respect to the ring radial direction is formed from one end 20 on the outer peripheral side of the cut surface 2 to the other end 23 on the inner peripheral side from the ring surface to the cut surface 2. has been done. On the back surface opposite to this half-cut surface 3, a half-cut surface 3' is formed diagonally from the other end 21 of the outer circumferential side a to one end 22 of the inner circumferential side b from the ring surface to the first cut surface 2. There is.
The cut surfaces 3, 3' form symmetrical projection lines that intersect each other at the midpoint, as shown in FIG.
Due to such cut surfaces 2 and cut surfaces 3 and 3', as shown in the perspective view of FIG. 6, 6 are formed, and the projections 5, 5 and the recesses 6,
6 are engaged and both ends abut. Therefore, no misalignment occurs in any direction. That is, in the radial direction of the ring, it is locked by the cut surfaces 3, 3', and in the width direction (the axial direction of the ring), it is locked by the cut surface 2, so that its movement is restricted.
Also, the sealing performance is improved compared to conventional simple straight cut or bias cut.

Note that when the outer peripheral side a and the inner peripheral side b of the O-ring become squeeze surfaces, the position of the cut surface 2 is changed. This is because when the penetrating cut surface 2 is formed as a squeeze surface, the cut surface 2 is squeezed by the tightening pressure.
This is because there is a risk that the sealing material may open and cause a bulging phenomenon, which may cause the projection 5 at the end and the recessed portion 6 to fit loosely, resulting in a decrease in sealing performance.

FIGS. 4 to 6 show examples in which the outer peripheral side a and the inner side b serve as squeeze surfaces.

In this embodiment, the cut surface 2 is first penetrated from the center of the front side x in the width direction of the ring body 1 to the back side y (or vice versa). This cut surface 2 is an arcuate surface including the annular axis of the ring 1. A half cut surface 3 is diagonally inserted from one end 20 of the front side x of this cut surface 2 to the other end 23 of the back side y. Also one end 2
From 1 to the other end 22, a half-cut surface 3' is provided diagonally on the opposite side to the cut surface 3. Due to the notched surface 2 and the cut surfaces 3 and 3', as shown in the perspective view of FIG. ，
6 is formed.

Note that if the length of the cut surface 2 is too long compared to the diameter of the ring body 1, the protrusion 5 will have an acute angle, and there is a risk that the protrusion 5 will curl up during installation. The tip angle of this protrusion 5 is preferably in the range of 60° to 30° as the plane projection angle θ in FIG. 1 or 5.

In the above embodiment, a pair of protrusions 5 and a recess 6 are provided at the end.
Although the structure is such that the protrusions and recesses are formed and abut against each other, various shapes and numbers of the protrusions and recesses are possible.

FIGS. 7 to 9 show an example in which three protrusions and a recess are formed at each end. In this embodiment, the front side x and the back side y are squeeze surfaces. The cut surface 2 is on the outer circumferential side a as in the embodiment shown in FIGS. 1 to 3.
It is provided so as to penetrate from the inner peripheral side b (or vice versa). A V-shaped half-cut surface 4 is formed from one end 20 of this cut surface 2 to one end 22 through the midpoint of a line connecting the other ends 21 and 23. This cut surface 4 reaches from the surface of the main body 1 to the cut surface 2. On the other hand, on the opposite side of the cut surface 4,
Similarly, a V-shaped half-cut surface 4' extending from the other end 21 to the other end 23 is formed. This cut surface 4' also reaches the cut surface 2 from the surface of the main body 1. The V-shapes of the cut surfaces 4, 4' are inverted with respect to each other, as shown in FIG.

What is shown in FIGS. 10 to 12 is the outer peripheral side a.
This is an embodiment in which the inner peripheral side b becomes a squeeze surface. In this embodiment, the cut surface 2 penetrates from the front side x to the back side y (or vice versa), except that this cut surface 2 is an arcuate surface including the annular axis of the main body 1. The rest is the same as the embodiment shown in FIGS. 7 to 9.

As shown in FIGS. 9 and 12, the cut surface 2 and the half-cut surfaces 4, 4' provide three protrusions 7, which engage with each other, at both ends of the cut surface α.
7, 7 and recesses 8, 8, 8 are formed. If the number of protrusions and recesses that engage with each other increases in this manner, the mutual binding and fitting properties will be improved, and the sealing performance will also be improved.

In addition, in each of the above-mentioned embodiments, the diagonally shaded portion of the cut surface 2 as shown in FIGS. 13 and 14 is not necessarily necessary, and in fact, it is better not to use the cut surface as an unnecessary cut surface. Improves sealing performance. Therefore, it is preferable to use a suitable cutter or scissors to cut out the shaded area so that it does not become a cutting surface.

In the above configuration, the O-ring main body 1 is installed in a predetermined groove, etc., and the protrusion 5 and the recess 6 or the protrusion 7 are attached.
If the concave portion 8 is brought into contact with the concave portion 8 and engaged, misalignment will not occur and the sealing performance will be good. At this time, the sealing performance is sufficient even if no special adhesive is applied to the cut surface α.

As explained above, the O-ring-shaped squeeze packing of the present invention is made by separating the end ring that has been finished to the specified dimensions, so it can be easily installed and removed without reducing dimensional accuracy and without disassembling the device itself. It becomes possible.

Moreover, since the penetrating cut surface is designed to pass through the non-squeezable surface and the non-squeezable surface,
It is possible to obtain sealing performance equivalent to that of an end ring without a separated part without impairing the sealing performance.

Further, since the protrusion and the recess are formed, there is no misalignment and the mounting operation is easy.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a side view, FIG. 3 is an enlarged perspective view of the separated part, FIGS. 4 to 6 are explanatory diagrams of other embodiments, and FIGS. 7 to 9 and 10 to 12 are FIGS. 13 and 14, which are explanatory diagrams of still other embodiments, are explanatory diagrams of the cut surface 2. 1...Ring body, 2...Notch surface, 3 and 3'...
...half cut surface, 4 and 4'...V-shaped half cut surface,
5 and 7... protrusions, 6 and 8... recesses.

Claims (1)

[Claims for Utility Model Registration] (1) At one point in an endless ring finished to predetermined dimensions; penetrating from one non-squeezable surface of the ring to the other non-squeezable surface along the circumferential axis of the ring; a cut surface; a single or continuous two or more diagonal first half cut surfaces that reach the cut surface from one squeeze surface of the ring and have a predetermined angle with respect to the radial direction of the ring; from the other squeeze surface to the cut surface, and the first
Forming a single or continuous two or more oblique second half cut surfaces having a predetermined angle that symmetrically intersect with the half cut surface; thereby forming a protrusion and a corresponding recess that engages with the protrusion, and cutting it off. An O-ring-shaped squeeze pack characterized by: (2) The O-ring-shaped squeeze gasket according to claim 1, wherein the first and second half-cut surfaces are two diagonal half-cut surfaces in a V-shape that are symmetrical to each other.