JPH08338545A - Feed valve device - Google Patents

Abstract

PURPOSE: To install a reed valve and a stopper unmistakingly and properly on a valve body, in respect to a reed valve device which is used for a suction part of fuel from an evaporator of an engine, by forming a bilaterally indicating portion on a portion of the reed valve which does not attribute to opening/ closing of an outlet. CONSTITUTION: A plate-like reed valve 16 which opens and closes openings 4 formed on a support 5 of a valve body 2 has three opening/closing movable parts 16a extended from a base 16b formed to be an E-character form. It is symmetrically formed to the outlet 4 in case of installation. A cutout 18 serving as bilaterally indication part for the reed valve 16 is formed on a left lower portion of the base 16b which does not attribute to opening/closing of the outlet 4. A cutout 19 is formed on a stopper 17 which regulates an opening of the lead valve 16 from the outside, at its left lower portion of a base 17b as a bilaterally indicating portion. Erroneous assembling is thereby prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reed valve device used in a suction part of fuel from a carburetor in various engines.

[0002]

2. Description of the Related Art Generally, in a two-cycle engine or the like, a reed valve device for controlling a fuel intake amount is provided at a fuel intake part from a carburetor.

5 and 6 show a conventional reed valve device 1 of this type. The reed valve device 1 is attached to a fuel intake portion with a valve body 2 made of metal such as aluminum die cast. The valve main body 2 is formed in a hat-like shape having a substantially V-shaped cross section, and an inlet 3 for sucking fuel is opened at the bottom of the valve main body 2. One or a plurality of opposed inclined supports 5 and 5 are provided. 5 outlets 4 (3 in FIG. 5)
The outlets 4, 4, ... Are opened in parallel.
Then, the valve body 2 is fixed at an appropriate position by a tightening tool (not shown) such as a bolt. Further, on the outside of the supports 5 and 5 in which the outlets 4 and 4 are formed, a thin flat plate-shaped resin or metal reed valve 6 for opening and closing the outlets 4 and 4 is provided.
, And a bent metal stopper 7 for restricting the opening of the reed valve 6 from the outside are fixed by fastening bolts 8, 8. Further, a rubber valve seat 9 is formed at an end edge portion of each outlet 4 of the support 5 to mitigate an impact force acting on the reed valve 6 that violently collides with the support 5 when the reed valve 6 is opened and closed. There is.

The reed valve 6 that opens and closes the outlet 4 is made of resin, and is made of a flat resin thin plate material obtained by impregnating a base material made of glass fiber or carbon fiber with resin. The metal thing is made of a stainless thin plate material or the like. Also, this reed valve 6
Are three opening / closing movable parts 6a, 6a for opening / closing each outlet 4.
Is formed in a substantially E shape extending from the base portion 6b, and when attached to the outlet 4 of the support 5, it is formed symmetrically toward the outlet 4. Further, the stopper 7 is formed in a substantially E shape by extending from the base portion 7b three restraining portions 7a, 7a ... Which are shorter than the opening / closing movable portion 6a of the reed valve 6, and like the reed valve 6, the stopper 7 is provided. It is formed symmetrically toward the outlet 4.

In the reed valve device 1 thus formed, the open / close movable parts 6a of the reed valve 6 are located outside during the suction stroke when the pressure of the engine-side suction part becomes lower than the pressure of the carburetor side. 6 to move from the fully closed state shown by the solid line in FIG. 6 to the fully opened state shown by the chain line in FIG. 6 to open each outlet 4 and suck the fuel into the combustion chamber of the engine. On the other hand, during the explosion and expansion strokes in which the pressure of the suction part on the engine side becomes higher than the pressure on the carburetor side, each open / close movable part 6a of the reed valve 6 changes from the fully open state of the dashed line in the figure to the fully closed state of the solid line in the figure. Returning, each outlet 4 is fully closed.

[0006]

The reed valve 6 is manufactured as follows.

First, as shown in FIG. 7 (a), an intermediate member 11a having a substantially E-shape is pressed from a thin plate material 11 such as a flat plate resin thin plate material or a stainless steel thin plate material in accordance with the shape of the reed valve 6 by pressing. Punch out. Subsequently, in order to increase the adhesion of the opening / closing movable portion 6a to the support 5, the tip of the opening / closing movable portion 6a is attached to the intermediate member 11a when the valve body 2 is attached to the intermediate member 11a, as shown in FIG. The reed valve 6 is manufactured by performing a bending process that imparts a slight bending so that the front surface side is the outside of the bending. At the same time, this bending process causes a burr at the edge of the punching process of the intermediate member 11a. This is done so that the surface is the front surface side when the valve body 2 is mounted.

The stopper 7 is manufactured as follows.

First, as shown in FIG. 8 (a), the intermediate member 12a is punched out from the flat metal plate material 12 into a substantially E shape in accordance with the shape of the stopper 7 by pressing. Then, in order to regulate the opening degree of each open / close movable part 6a of the reed valve 6,
As shown in FIG. 3B, the stopper 7 is manufactured by subjecting the intermediate member 12a to a bending process for imparting a predetermined bending so that the surface side when mounted on the valve body 2 is inside the bending. At the same time, this bending process is performed such that the surface of the intermediate member 12a where burrs are generated in the punching process is the inside of the bending process.

However, the burr generated on each of the intermediate members 11a and 12a in the manufacturing process of the reed valve 6 and the stopper 7 could not be easily distinguished visually. Further, since the reed valve 6 and the stopper 7 are both formed symmetrically, when the bending process is performed, the intermediate member 1 having a substantially flat plate shape as a whole is substantially E-shaped.
The left and right sides of 1a and 12a could not be distinguished, and the surfaces on which burrs had occurred could not be easily distinguished even by the shapes of the intermediate members 11a and 12a. Therefore, in the above-mentioned conventional example, it was not always possible to properly match the burr-generated surface of each of the intermediate members 11a and 12a with the bending direction. Therefore, the following inconveniences have occurred.

Contrary to the normal state, in one reed valve 6, if the curved surface is formed so that the surface of the intermediate member 11a in which the burrs are formed is inside the curved surface, the reed is first When the surface of the valve 6 on which the burr is generated faces the support 5 of the valve body 2 and is mounted, when each opening / closing movable part 6a is opened / closed, there is a burr, so that the edge of each opening / closing movable part 6a is In particular, so-called chipping such as fine cracks or notches occurs at the vibrating tip portion 6c, and the durability of the reed valve 6 deteriorates. In particular, this problem has remarkably appeared in the reed valve 6 made of resin. Further, when the reed valve 6 is mounted without facing the burr-producing surface to the support 5 of the valve body 2, the curving direction of each opening / closing movable part 6a is opposite to the normal direction, and the reed valve 6 is supported in the free state. There is a disadvantage in that a gap is created between the open / close movable portion 6a and the tip end portion of the open / close movable portion 6a, and fuel in the valve body 2 is unnecessarily leaked, leading to deterioration in engine performance.

Contrary to the normal state, when the other stopper 7 is bent so that the surface of the intermediate member 12a on which burrs are generated is outside the curve, the stopper 7 is opened. When it is mounted on the support 5 of the main body 2, burrs are generated on the surface of the reed valve 6 with which the open / close movable parts 6a come into contact.
When a is opened and closed, there is a disadvantage that it collides with the burr and causes so-called chipping such as fine cracks or notches in each open / close movable part 6a, which deteriorates the durability of the reed valve 6. It was

The present invention has been made in view of these points, and when manufacturing a reed valve or a stopper having a flat plate shape as a whole, it is necessary to clearly check the left and right of the reed valve and the stopper to generate burrs in an appropriate direction. Therefore, the reed valve and the stopper can be properly attached to the valve body, which can prevent the reed valve from chipping and improve the durability of the reed valve. In the free state, the adhesion of the tip of each open / close movable part to the support is improved, so that the intake action can be accurately performed, engine performance can be fully exerted, and the structure is simple and easy to manufacture. It is an object of the present invention to provide a reed valve device which is low in cost.

[0014]

In order to achieve the above object, a reed valve device according to the present invention as defined in claim 1 has a reed valve which is a flat plate for opening and closing an outlet provided in a support. In the reed valve device, a left / right discriminating portion for discriminating the left / right of the reed valve is formed in a portion of the reed valve that does not contribute to opening / closing of the outlet.

Further, the reed valve device of the present invention according to claim 2 has a reed valve for opening and closing the outlet opened in the support, and a stopper for restricting the opening of the reed valve from the outside. In the device, the stopper is provided with a left / right identification portion for identifying the left and right sides thereof.

[0016]

According to the present invention, since the left and right identifying portions are provided on the reed valve and the stopper, the left and right can be easily identified. Therefore, even if the reed valve and the intermediate member of the stopper, which are punched out of the flat plate material, respectively, can distinguish the left and right of the plate even if it is a flat plate, the left and right sides of the intermediate member can be used as a reference and the curved surface with the burr is curved. The following bending can be performed by properly combining with the direction of. That is, in the reed valve, the burred surface of the intermediate member is formed outside of the curve, and in the stopper, the burred surface of the intermediate member is formed inside of the curve. As a result, the reed valve and stopper can be properly attached to the valve body, chipping of the reed valve can be prevented, and a reed valve with excellent durability can be obtained. Since the adhesion of the tip of each movable opening / closing part to the support is improved, the intake action can be accurately performed,
The engine performance can be fully exhibited.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

1 to 4 show an embodiment of the present invention, FIG. 1 shows the entire reed valve device 1a of the present invention,
2A and 2B show the reed valve and the stopper of the present invention, respectively, and FIGS. 3 and 4 show the manufacturing process of the reed valve and the stopper of the present invention, respectively.

In the present invention, first of all, as shown in FIG. 2 (a), the reed valve 16 having a flat plate shape for opening and closing the outlet 4 provided in the support 5 of the valve body 2 is provided. In the lower left part of the base portion 16b, which is a portion that does not contribute to opening and closing, a cutout portion 18 is formed as a left and right identifying portion that identifies the left and right of the reed valve 16. Further, the reed valve 16 has three open / close movable parts 16a for opening / closing each outlet 4,
16a are formed in a substantially E shape extending from the base portion 16b, and except for the cutout portion 18, the outlet 4 of the support 5 is formed.
When it is attached to the, it is formed symmetrically toward the outlet 4.

Further, according to the present invention, the reed valve 1 is used.
In the stopper 17 that regulates the opening degree of 6 from the outside, as shown in FIG. 7B, a notch portion 19 is formed in the lower left portion of the base portion 17b as a left / right identification portion for identifying the left and right. Further, the stopper 17 is provided from the base 17b to the reed valve 16
The three holding portions 17a, 17 shorter than the opening / closing movable portion 16a of
The reed valve 1 is formed in a substantially E shape by extending a ...
As in the case of No. 6, except for the above-mentioned notch 19, the support 5 is formed in a bilaterally symmetrical shape toward the outlet 4.

Next, a method of manufacturing the reed valve and the stopper formed as described above will be described.

On the other hand, in the reed valve 16, first,
As shown in FIG. 3A, a thin plate material 21 such as a flat resin thin plate material or a stainless steel thin plate material is pressed into a substantially E shape having a notch portion 18 at the lower left according to the shape of the reed valve 16. , The intermediate member 2 from top to bottom in FIG.
Punch 1a. As a result, when the cutout 18 is located at the lower left of the intermediate member 21a, burrs are generated on the front side of the intermediate member 21a. Next, using this notch 18 as a mark, as shown in FIG.
The reed valve 16 is manufactured by performing a curving process for imparting a slight curving so that the surface on which burrs are generated in the punching process, that is, the surface side when mounted on the valve body 2 is the outside of the curving. Thus, according to this embodiment, the intermediate member 21a
The reed valve 16 is manufactured so that the surface on which the burr is generated is outside the curve.

In the other stopper 17, first,
As shown in FIG. 4 (a), a notched portion 19 is pressed from the flat metal plate material 22 according to the shape of the stopper 17 by pressing.
The intermediate member 22a is punched out from the top to the bottom in FIG. Thereby, the intermediate member 22
When the notch 19 is located at the lower left of a, burrs are generated on the front side of the intermediate member 22a. Next, using this notch 19 as a mark, as shown in FIG.
The stopper 17 is manufactured by subjecting the intermediate member 22a to a curving process that imparts a predetermined curving so that the surface on which burrs are generated in the punching process, that is, the surface side when mounted on the valve body 2 is inside the curving. Thus, according to the present embodiment, the stopper 17 is manufactured so that the surface of the intermediate member 22a on which the burr is generated is inside the curved surface.

Next, a procedure for assembling the reed valve device 1a of this embodiment will be described.

First, the supports 5 and 5 in which the outlets 4 and 4 of the valve body 2 made of metal such as aluminum die-cast are provided.
The reed valve 16 and the stopper 17 are sequentially stacked on the outer side of the so that the notches 18 and 19 are located at the lower left toward the support 5, and are fixed by fastening bolts 8, 8.

As described above, in this embodiment, the notches 18 and 19 are used as the marks, and the reed valve 16 and the stopper 17 are mounted on the valve body 2 with the right and left properly aligned (see FIG. 1). As a result, one reed valve 16 is securely mounted in a regular mounting state in which the surface with burrs is the outside of the curve and the surface without burrs faces the support 5, and The stopper 17 is securely mounted in a regular mounting state in which the surface with burrs is the inside of the curve and the surface without burrs faces the reed valve 16.

Therefore, according to this embodiment, the reed valve 16
The stopper 17 can be properly attached to the valve body 2, chipping of the reed valve 16 can be prevented, and the reed valve 16 having excellent durability can be obtained.
In addition, since the close contact of the tip of each open / close movable part 16a with the support 5 in the free state of the reed valve 16 can enhance the intake action, the engine performance can be fully exhibited. Further, the structure is simple, the manufacturing is easy, and the cost is low.

The left and right identifying portions of the reed valve 16 and the stopper 17 are notched portions 18 and 19 of the above-mentioned embodiment.
Alternatively, the left and right sides may be displayed by forming holes to form the intermediate members 21a and 22a asymmetrically, imprinting a marking, or applying a marker. In particular, the notches 18 and 19, which can be formed simultaneously with the punching of the intermediate member by a press, the formation of holes, the imprinting of markings, etc., are preferable from the viewpoint of preventing an increase in the number of processes.

Further, the present invention is not limited to the above embodiment, but can be modified as necessary.

[0030]

As described above, since the reed valve device of the present invention is constructed and operates, when manufacturing a reed valve or a stopper having a flat plate shape as a whole, it is necessary to clearly check the left and right of the reed valve device and the stopper so that they are properly oriented. Burr can occur in the
The reed valve and stopper can be properly attached to the valve body, which prevents chipping of the reed valve and improves the durability of the reed valve, and supports the reed valve in its free state. By increasing the close contact of the tip of each open / close movable part with respect to the, it is possible to perform the intake action accurately, it is possible to fully exert the engine performance, the structure is simple, the manufacturing is easy, and the cost is low. There are effects such as becoming.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of a reed valve device of the present invention.

2A and 2B are front views showing an embodiment of a reed valve and a stopper of the present invention, respectively.

FIG. 3 is a diagram showing a manufacturing process of the reed valve of the present invention.

FIG. 4 is a diagram showing a manufacturing process of the stopper of the present invention.

FIG. 5 is an overall perspective view showing an example of a conventional reed valve device.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is a diagram showing a manufacturing process of a conventional reed valve.

FIG. 8 is a view showing a manufacturing process of a conventional stopper.

[Explanation of symbols]

 1a Reed valve device 2 Valve body 4 Outlet 5 Support 16 Reed valve 17 Stoppers 18, 19 Notches

Claims (2)

[Claims] 1. A reed valve device having a reed valve having a flat plate shape that opens and closes an outlet provided in a support, and identifies the left and right sides of the reed valve in a portion that does not contribute to the opening and closing of the outlet of the reed valve. A reed valve device having left and right identifying portions. 2. A reed valve device having a reed valve that opens and closes an outlet opened in a support, and a stopper that regulates the opening of the reed valve from the outside. A reed valve device characterized by being formed.