JP4176495B2 - Reed valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reed valve, and more particularly to a reed valve suitable for supplying air to an intake system or an exhaust system of an engine.
[0002]
[Prior art]
In general, a configuration using a reed valve for supplying air to an intake system or an exhaust system of an engine is well known. For example, in a secondary air supply device for an engine used as one of the exhaust gas regulation measures, a reed valve is disposed in a connecting pipe connected between an air cleaner and an exhaust system pipe so that the exhaust pulsates. By using the pressure difference between the upper and lower parts of the reed valve generated in the exhaust system, air is supplied from the air cleaner to the exhaust gas in the exhaust system via the reed valve, and the unburned components in the exhaust gas are reburned. It is supposed to let you.
[0003]
As a conventional technique, as a reed valve used in the secondary air supply device as described above, a gasket having a U-shaped cross section is attached to the periphery of the valve seat constituting the support, and the inlet case and the outlet are interposed through the gasket. The support is provided so as to sandwich the above-described gasket attached between the case and the case (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
Registered Utility Model No. 3008646 (5th page)
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional reed valve, the substantially U-shaped gasket attached to the periphery of the valve seat constituting the support is manufactured separately from the valve seat and is attached to the outer periphery of the valve seat to constitute the support. is doing. Therefore, the valve seat and the gasket constituting the support must be molded separately, and after the molding, the gasket must be attached to the outer periphery of the valve seat by means such as fitting, and the manufacturing process is bulky. As a result, there were problems such as high costs.
Therefore, the present invention has been invented in view of the above circumstances, and aims to simplify the manufacturing process and to provide a low-cost reed valve.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the reed valve according to the present invention has a gasket made of a rubber-like elastic body so as to surround the outer periphery of a plate-like support having a fluid circulation hole formed in the center. , a valve seat made of a rubber-like elastic body around the fluid passing holes of the support, on one surface of the plate-like support, that open to contact with the valve seat in response to the pressure of the fluid passing through the flow hole In the lead valve, the lead having a flexible elasticity and a stopper for regulating the lift amount of the lead are overlapped and fixed in a cantilever manner with a connecting member in such a manner that the lead covers the flow hole. and said valve seat are communicated with each other through the flow passage, the unvulcanized rubber to flow through the flow passage at the time of molding, it is baked molded integrally with the valve seat and the gasket support Kotooso It is an feature.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
A reed valve according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. Reference numeral 1 denotes a reed valve, and a fluid circulation hole 2 is formed at the center and is provided so as to surround the outer periphery thereof. A support 4 having a gasket 3 made of a rubber-like elastic body is integrally connected to a lead 5 having elasticity for opening and closing the flow hole 2 and a stopper 6 for regulating the lift amount of the lead 5. It is fastened and fixed in a cantilever manner with a screw 7 as a member. Reference numeral 8 denotes a fixing pin for preventing the stopper 6 from rotating.
[0008]
The reed 5 having elasticity of the reed valve 1 is normally seated on the valve seat 10 that receives the reed 5 at the periphery of the fluid circulation hole 2 provided in the plate-like support 4, and the fluid circulation hole 2. However, when a pressure difference is generated between the upper part and the lower part of the reed valve 1 disposed in the connecting pipe connected between the air cleaner and the exhaust system pipe (in detail, When the pressure becomes higher than the pressure below the lead 5 having the elasticity, the fluid opens and the fluid flows through the flow hole 2, and the lift amount is regulated by the stopper 6. Then, the support fitting 4a and the rubber-like elastic gasket 3 are integrally formed so as to surround the outer periphery of the plate-like support fitting 4a constituting the support 4, and between an inlet case and an outlet case (not shown). The confidentiality of the outer periphery when it is installed is ensured.
[0009]
However, in the prior art, as explained in the section of the prior art, the rubber-like elastic gasket 3 provided so as to surround the outer peripheral portion of the support bracket described above has a plate-like support with a substantially U-shaped cross section. In order to fit the outer periphery of the metal fitting 4a, a plate-like support metal fitting provided with a die for molding the rubber-like elastic gasket having a substantially U-shaped cross section and a fluid circulation hole is provided. Need two types of molds, a mold for baking and molding a valve seat, which will be described later, and a process of fitting the manufactured gasket into the outer periphery of a plate-shaped support fitting In addition, the complicated work of fitting the gasket together with a plurality of molding processes has been added, and there has been a problem in workability.
[0010]
Therefore, as shown in FIGS. 5 to 7, the support 4 in the present embodiment is integrally baked with a rubber-like elastic gasket 3 on the outer periphery of the plate-like support fitting 4 a constituting the support 4 described above. The valve seat 10 and the gasket 3 for molding and protecting the lead 5 around the fluid circulation hole 2 and communicating with each other are communicated via a flow passage 11 (FIG. 3, FIG. 3). 5). When the rubber-like elastic gasket 3 and the valve seat 10 are integrally baked and molded on the plate-like support fitting 4a, either the cavity gasket 3 forming portion or the valve seat 10 forming portion of the mold is used. When one side is filled with unvulcanized rubber, which is a material of a rubber-like elastic body, by injection or the like, the unvulcanized rubber flows through the flow passage 11 and also enters the other valve seat 10 forming part or gasket 3 forming part. It is designed to be filled. In this manner, the rubber-like elastic gasket 3 and the valve seat 10 can be integrally baked and molded on the support fitting 4a.
[0011]
Also, continuous small protrusions 12 and 13 are formed on the front and back surfaces of the rubber-like elastic gasket 3 integrally formed so as to surround the outer periphery of the plate-shaped support fitting 4a. When the reed valve 1 is disposed on the connecting pipe by the small protrusions 12 and 13, the buffering and sealing properties of the reed valve 1 can be provided.
[0012]
In the present embodiment, as described above, the rubber-like elastic gasket 3 is integrally baked and molded so as to surround the outer periphery of the plate-like support fitting 4a constituting the support 4. In other words, there is no need for a mold for molding the gasket 3, and the rubber-like elastic gasket 3 and the valve seat 10 are integrally baked and molded with a single mold for molding the support 4. Therefore, the process of manufacturing the support 4 can be shortened, and a complicated process of fitting a gasket is not required, so that productivity can be improved.
[0013]
【The invention's effect】
The reed valve according to the present invention is used to form a plate-like support having a gasket made of a rubber-like elastic body provided with a fluid circulation hole at the center and surrounding the outer periphery thereof. Since the gasket is integrally formed with the support, the production process of the reed valve can be simplified, so that not only the productivity can be improved but also the cost of the reed valve can be reduced. It is.
[Brief description of the drawings]
1 is a front view of a reed valve. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. FIG. 3 is an enlarged explanatory view of a portion C in FIG. Front view [FIG. 6] BB sectional view of FIG. 5 [FIG. 7] Enlarged explanatory view of part D of FIG.
1 Lead valve 2 Fluid flow hole 3 Gasket 4 Support 4a Support bracket 5 Lead 6 Stopper

Claims (1)

A valve made of a rubber-like elastic body has a gasket made of a rubber-like elastic body so as to surround an outer peripheral portion of a plate-like support having a fluid circulation hole formed in the center, and a valve made of a rubber-like elastic body around the circulation hole of the support includes a seat, on one surface of the plate-like support, a lead having an openable elastically to abut against the valve seat in response to the pressure of the fluid passing through the flow hole, and a stopper for restricting the lift amount of the lead and the reed valve formed by connecting and fixing a connecting member to the polymerization to cantilever shape such that the lead covers the communication holes, the valve seat and the gasket is communicated via a flow passage, unvulcanized during molding A reed valve in which vulcanized rubber flows through the flow passage and the gasket and the valve seat are integrally baked and molded on a support .

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