JPH0680071U - Reed valve - Google Patents

Abstract

(57) [Abstract] [Purpose] Improving the sealing property [Constitution] A recess 9 is formed on one surface of the case 2 in which the flow hole 3 is formed, and a vulcanized rubber is disposed in the recess 9. In a reed valve in which a valve seat portion 6 is formed and a lead for opening and closing the flow hole 3 is disposed on one surface of the case 2, and the valve seat portion 6 seals between the case 2 and the lead. A rubber reservoir is formed on the other surface of the case 2, and a through hole 10 that communicates the inside of the recess 9 with the rubber reservoir is formed in the case 2. The through hole 10 is the recess. 9 is filled with unvulcanized rubber,
When forming the valve seat portion 6, a reed valve which is bored in the recess 9 where the unvulcanized rubber reaches the end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reed valve, and more particularly to a reed valve having an improved sealing property.

[0002]

[Prior Art and Problems to be Solved]

 Generally, a reed valve as shown in FIG. 5 is known. That is, the reed valve 51 includes a case 52 having a through hole 53 formed therein, a lead 54 for opening and closing the through hole 53, and a stopper 55 for limiting the maximum lift amount of the reed 54. The stopper 55 is fixed to the case 52 with a screw 58.

Further, as shown in FIG. 6, the case 52 is formed of vulcanized rubber or the like on the side where the lead 54 abuts, in order to ensure a sealing property between the case 52 and the lead 54. Valve seat portion 56 is formed.

The valve seat portion 56 is formed by injecting unvulcanized rubber into a recess 59 formed in the peripheral portion of the flow hole 53 of the case 52 and vulcanizing and molding.

However, if the dimensions of the case 52, the vulcanization mold, and the like vary, it is difficult to set the mold contact, and during vulcanization molding of the valve seat portion 56, unvulcanized rubber sticks out of the recess 59. The rubber that has flowed out to the mounting surface 52a formed on the peripheral portion of the case 52 is vulcanized and molded at this mounting surface 52a to form the protruding portion 60, and a step is formed on the mounting surface 52a to form a mating member. There was a problem that the sealability between the two deteriorated.

The present invention solves the above-mentioned problems of the conventional one, and an object thereof is to provide a reed valve in which the valve seat portion does not protrude and the sealing performance is not deteriorated.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention forms a recess in one surface of a case having a through hole, and vulcanized rubber is arranged in the recess to form a valve seat portion. In a reed valve in which a reed for opening and closing the flow hole is provided on one surface of the case and the valve seat seals between the case and the lead, a rubber is provided on the other surface of the case. A through hole is formed in the case to form a reservoir and to communicate the inside of the recess with the rubber reservoir, and the through hole is filled with unvulcanized rubber in the recess to form a valve seat portion. When forming, unvulcanized rubber is adopted at the end of the recess where it reaches.

[0008]

[Action]

 According to the present invention, by adopting the above-mentioned means, a through hole that connects the recess on one surface and the rubber reservoir on the other surface is formed at the position in the recess where the unvulcanized rubber reaches the end. When filling the unvulcanized rubber into the recess to form the valve seat, excess injection pressure can be released to the rubber reservoir through this through hole, and the excess pressure from the recess can be eliminated as in the past. There is no risk of unvulcanized rubber squeezing out due to the injection pressure of.

[0009]

【Example】

 An embodiment of the present invention shown in the drawings will be described below. 1 to 4 show an embodiment of a reed valve according to the present invention, FIG. 1 is a schematic view showing one surface of a case, and FIG. 2 is a view taken along the line AA of FIG. FIG. 3 is a schematic sectional view as seen, FIG. 3 is a schematic view showing the other surface of the case, and FIG. 4 is a schematic plan view of the reed valve.

That is, as shown in FIG. 4, the reed valve 1 limits a case 2 having a through hole 3 formed therein, a lead 4 for opening and closing the through hole 3, and a maximum lift amount of the reed 4. The lead 4 and the stopper 5 are screwed to the case 2 with a screw 8.

As shown in FIG. 1, in the case 2, the case 2 and the lead 4 are provided at the peripheral portion of the through hole 3 on one surface with which the lead 4 abuts and the portion between the screw holes 7, 7. A valve seat portion 6 made of vulcanized rubber or the like is formed in order to ensure a sealing property between the valve seat portion 6 and the valve seat portion.

The valve seat portion 6 is vulcanized and molded by injecting unvulcanized rubber into a recess 9 formed in the peripheral portion of the flow hole 3 of the case 2 and a portion between the screw holes 7, 7. It is formed by.

In addition, a through hole 10 is formed in a portion of the recess 9 between the screw holes 7 and the rubber injection portion 12 indicated by a black circle in FIG. When injecting unvulcanized rubber, the site where the through hole 10 is formed is the site that reaches the end of the unvulcanized rubber.

The through-hole 10 may be formed at a position where the unvulcanized rubber reaches the last when the unvulcanized rubber is filled in the recess 9. As described above, the number of the through holes 10 is not limited to one between the screw holes 7, and the number of the through holes 10 varies depending on the shape of the reed valve 1. It is preferably about 0.5 mm to 3.0 mm, but it is not limited because it depends on the viscosity of the unvulcanized rubber, the injection pressure, and the like.

Further, as shown in FIG. 3, a rubber reservoir 11, which is a recess having a depth of about 0.5 mm, is formed in the peripheral portion of the screw hole 7 on the other surface of the case 2, and the rubber reservoir 11 is formed. 11 and the recess 9 on one surface are communicated with each other through the through hole 10.

Then, in order to form the valve seat portion 6 in the case 2 configured as described above, the case 2 is placed in the vulcanization mold, and the rubber injection portion 12 indicated by a black circle in FIG. To the position, unvulcanized rubber is injected into the recess 9.

Then, when the unvulcanized rubber is injected into the recess 9, the unvulcanized rubber is filled in the hatched portion of FIG. 1, and when this is vulcanized and molded, the valve seat portion 6 is formed. .

Further, since the through hole 10 is open to the rubber reservoir 11 on the other surface, an excessive injection pressure is guided to the rubber reservoir 11 through the through hole 10, and the mold structure of the vulcanization mold is formed. Without changing the above, there is no fear that the unvulcanized rubber will squeeze out from the recess 9 due to the excessive injection pressure as in the conventional case, and the sealing property is improved.

[0019]

[Effect of device]

 This invention is configured as described above, so that the unvulcanized rubber reaches the last position in the recess provided on the one surface of the case, and the recess on one surface and the go Since a through hole that communicates with the rubber reservoir is formed, when filling the unvulcanized rubber into the recess and forming the valve seat part, excess injection pressure is applied to the rubber reservoir through this through hole. Even if it does not change and the mold structure of the vulcanization mold is changed, there is no danger of unvulcanized rubber squeezing out from the recess due to excessive injection pressure as in the past, and it has the excellent effect of improving the sealing property. It is a thing.

[Brief description of drawings]

FIG. 1 is a schematic view showing one surface of a case in an embodiment of a reed valve according to the present invention.

FIG. 2 is a schematic cross-sectional view as seen from the direction of arrow AA in FIG.

FIG. 3 is a schematic view showing the other surface of the case in the embodiment of the reed valve according to the present invention.

FIG. 4 is a schematic plan view showing a reed valve according to the present invention.

FIG. 5 is a schematic plan view showing a conventional reed valve.

FIG. 6 is a schematic view showing one surface of a case in a conventional reed valve.

[Explanation of symbols]

 1, 51 ...... Reed valve 2, 52 ...... Case 3, 53 ...... Circulation hole 4, 54 ...... Reed 5, 55 ...... Stopper 6, 56 ...... Valve seat 7, 57 ...... Screw hole 8, 58 …… Screw 9,59 …… Recess 10 …… Through hole 11 …… Rubber reservoir 12 …… Rubber injection part 52a …… Mounting surface 60 …… Overhang part

Claims (1)

[Scope of utility model registration request] 1. A case (2) having a through hole (3) formed therein.
A recess (9) is formed on one surface, a vulcanized rubber is disposed in the recess (9) to form a valve seat portion (6), and a lead () for opening and closing the flow hole (3) is formed. 4) to the case (2)
In the reed valve (1), which is disposed on one surface and has the valve seat portion (6) sealing between the case (2) and the reed (4), the other surface of the case (2) A rubber reservoir (11) is formed in the case (2), and a through hole (10) for communicating the inside of the recess (9) with the rubber reservoir (11) is formed in the case (2).
0) is a portion in the recess (9) where the unvulcanized rubber reaches the last when the unvulcanized rubber is filled in the recess (9) to form the valve seat portion (6). A reed valve characterized by being drilled.