JPH0353018Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a valve mounting structure for an air compressor such as a diaphragm pump, and more particularly to a technique for easily attaching and removing a valve.

[Background Art] Conventionally, the valve mounting structure of an air compressor such as a diaphragm pump is as shown in FIG. As shown in FIG. 6, a rod-shaped grip 32 for attachment is integrally formed with the valve 5 having elasticity such as rubber.
The large diameter portion 33 of 2 is formed, and the rod-shaped grip body 3
2 into the mounting hole 34 of the valve seat 2 and
3, the valve 5 is attached to the valve seat so as to prevent it from coming off through the attachment hole 34. By the way, the former method requires the screw 30 and the washer 31 as well as a screw tightening process, and the latter method requires the rod-shaped grip 32 to be pulled and attached from the back side of the valve seat 2. As shown in FIG. 7, when replacing the discharge valve 21, there was a problem in that the compressor case 10 to which the discharge valve 21 is attached had to be removed.

[Purpose of the invention] This invention was created in view of these problems, and its purpose is to install and replace the valve without using screws or washers, and without removing the valve seat side. The purpose of the present invention is to provide a valve mounting structure for an air compressor that can be used for air compressors.

[Disclosure of the invention] In the present invention, protrusions 3 for attaching a valve are protruded from a valve seat 2 in which a valve hole 1 is formed, and protrusions 3 are provided outwardly at regular intervals from the circumference of the tip of the protrusions 3. A large diameter portion 4 is formed by protruding a projecting piece 23, and the valve 5 has elasticity and can open and close the valve hole 1. An air compressor in which an elastic fitting part 7 is formed to elastically fit onto the protrusion 3, the elastic fitting part 7 is elastically fitted to the protrusion 3, and the valve hole 1 is closed with the valve 5. By configuring the valve in this way, the above object can be achieved. That is, the valve 5 is formed with an elastic fitting part 7 that can expand more than the large diameter part 4 of the protrusion 3 and elastically fits into the protrusion 3.
By elastically fitting the small diameter base 6 of the valve 5, the valve 5 can be installed and replaced from the front of the valve seat 2 without the need for screws or washers. This eliminates the need to remove the case portion forming the valve seat 2.

Embodiments of the present invention will be described in detail below based on the drawings.

Inside the cover 8, a compressor case 10 is attached to both sides of a cylindrical pump casing 9 serving as an outer shell of the pump, and a diaphragm 11 is sandwiched on both sides of the pump casing 9. Pump casing 9
A permanent magnet 12, a yoke 13, and a plate 14 are attached to constitute a magnetic circuit, which is spanned between a pair of diaphragms 11 and 11 to hold a shaft 16, and is supported by a center plate 15 that is integrated with this shaft 16. The coil 18 is wound around the coil stand 17, which is movably inserted between the coil stand 17 and the coil 18 between the plate 14 and the yoke 13.
By passing an alternating current through the valve 5 of the present invention, the pair of diaphragms 11 and 11 are reciprocated and moved by the electromagnetic attractive force or the electromagnetic repulsive force and the spring 19.
The air compressor is a well-known air compressor that introduces outside air from an intake valve 20 as a valve 5, compresses the intake air by the next reciprocating action of the diaphragm 11, and discharges the compressed air from a discharge valve 21 as the valve 5 through a discharge port 22. It is configured as a diaphragm pump.

A valve seat 2 having a valve hole 1 is formed in a compressor case 10. As shown in FIG. 2, this valve seat 2 is provided with a protruding portion 3 for mounting the valve. A large diameter portion 4 is formed at the tip of the protrusion 3. This large diameter portion 4 has projecting pieces 23 projecting at approximately equal intervals in the circumferential direction. In order to form the protruding pieces 23 at intervals in the circumferential direction in this manner, notches 25 are formed at intervals in the circumferential direction from the front side of the valve seat 2, and at the same time, notches 25 are formed at intervals in the circumferential direction from the back side of the valve seat 2. The protruding pieces 23 are formed by drilling holes 24 at intervals and cutting them. The valve 5 is made of rubber or plastic and has rubber elasticity and is capable of opening and closing the valve hole 1. The valve 5 is made of rubber or plastic and has rubber elasticity and is capable of opening and closing the valve hole 1.
A mounting hole 26 is formed as an elastic fitting portion 7 that is elastically fitted into the mounting hole 26 . Therefore, the mounting hole 26 of the valve 5
The mounting hole 26 is enlarged in diameter and extends beyond the large diameter portion 4 of the protrusion 3.
is elastically fitted onto the small diameter base 6 of the protrusion 3, and the valve hole 1 is closed with the valve 5.

According to such a configuration, the mounting hole 26 of the valve 5 is expanded to be larger than the large diameter portion 4 of the protrusion 3.
6 is elastically fitted to the small diameter base 6 of the protrusion 3 beyond the large diameter part 4, the valve 5 can be installed and replaced from the front of the valve seat 2 without the need for screws or washers. When replacing the valve seat 2,
There is no need to remove the compressor case 10 that forms the compressor case. Further, there is no need to protrude a rod-shaped grip body from the back of the valve 5 as in the conventional case, so that it does not interfere with the drive of the diaphragm 11, the shape of the valve 5 can be simplified, and It can be made into the same shape as the tightener, making it compatible.

FIG. 4 shows another embodiment, in which the mounting hole 26 of the valve 5 made of rubber or plastic is made into a blind hole, and a large diameter part (4) of the protrusion 4 is fitted in the deep part of the blind hole. A tapered diameter portion 27 is formed. In such an embodiment, the mounting hole 26 is a blind hole, so
The airtight sealing surface only needs to be on the outer periphery of the valve 5, which serves as the air passage, eliminating the need for an inner seal, allowing play to be provided in the fitting of the protrusion 3 with the small diameter base 6, and allowing the valve 5 to have a tight seal. It is easy to install.

[Effects of the invention] In summary, the present invention forms an elastic fitting part on the valve that can expand more than the large diameter part of the protrusion and elastically fits into the protrusion. Since it is elastically fitted to the protrusion, the valve can be installed and replaced from the front of the valve seat without the need for screws or washers. The advantage is that there is no need to remove the case part.

Moreover, even if screws or washers are not used, the protruding piece that makes up the large diameter part presses down on the upper end surface of the elastic fitting part, which ensures that it does not come off and makes it easy to install. It is something that is being done.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of one embodiment of the present invention;
The figure is a sectional view showing the mounting structure of the above valve, FIG. 3 is a front view of the same, FIG. 4 is a sectional view of another embodiment of the same, FIG. 5 is a sectional view of the conventional example, and FIG. A sectional view of another conventional example, FIG. 7 is a sectional view showing the relationship between the same valve and the compressor case, where 1 is a valve hole, 2 is a valve seat, 3 is a protrusion, 4 is a large diameter part, 5 is a valve, 6 is a small diameter base, 7 is an elastic fitting part, and 23 is a protruding piece.

Claims (1)

[Scope of utility model registration request] A protrusion for attaching the valve is protruded from the valve seat in which the valve hole is formed, and protrusion pieces are protruded outward at regular intervals from the circumference of the tip of the protrusion to form a large diameter part. , an elastic fitting part is formed on the valve which has elasticity and can open and close the valve hole, and which can expand larger than the large diameter part of the protrusion and elastically fits into the protrusion; A valve mounting structure for an air compressor in which a fitting part is elastically fitted onto a protrusion and a valve hole is closed with a valve.