JP3082989B2 - Multiple valve unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple valve device in which a plurality of valve cartridges are mounted on one manifold block.

[0002]

2. Description of the Related Art In a conventional multiple valve apparatus shown in FIGS. 6 to 8, a pump passage 2 and a tank passage 3 having a circular cross section are cut into a manifold block 1 and both the passages 2 and 3 are orthogonal to the two. A plurality of insertion holes 4 are formed. The tip of the insertion hole 4 is connected to the tank passage 3.
Open directly to the In the insertion hole 4 thus formed,
As shown in FIG. 7, the valve cartridge 5 is inserted. The outside of the cartridge 5 is partitioned by seal members 6 to 8, the middle area is defined as the inflow port section 9, and the areas on both sides thereof are defined as the actuator port section 10. It is assumed to be 11. The actuator ports 10 and 11 are connected to actuator ports A formed on both sides of the pump passage 2,
B is communicated.

The inflow port 9 is connected to the pump passage 2.
The communication port 12 for this purpose is formed by machining from the outside of the manifold block 1 as shown in FIG. That is, a cutting tool (not shown) is made to penetrate the pump passage 2 from the outside of the manifold block 1 and reach the inflow port portion 9 to form the communication port 12, and the opening portion on the side of the manifold block 1 is formed. It is plugged with plug 13. And, as a matter of course, as shown in FIG. 6, the communication ports 12 must be formed by the number of valves corresponding to the plurality of valve cartridges 5.

Although the cartridge 5 incorporates a spool (not shown), the spool is switched by solenoids 14 and 15 provided outside the cartridge 5. When the spool is switched, for example, one actuator port A communicates with the pump passage 2 via the actuator port portion 10, the inflow port portion 9, and the communication port 12. At this time, the other actuator port B communicates with the tank passage 3 via a passage formed along the axis of the spool.

[0005]

In the conventional apparatus as described above, the tank passage 3 is made circular in cross section and the insertion hole 4 is directly opened in the tank passage 3. As shown in FIG. The length of the edge E is longer than the circumference of the insertion hole 4 by an arc e. When the edge E of the opening portion of the insertion hole becomes long in this way, many burrs are generated. Since the burrs eventually flow into the oil, the burrs may enter into the valve seat or the like, causing problems such as impairing the seat properties. An object of the present invention is to provide a multiple valve device capable of minimizing the generation of burrs by shortening the edge length of the opening of the insertion hole.

[0006]

According to the present invention, a pump passage and a tank passage are formed in a manifold block, a plurality of insertion holes intersecting the tank passage are formed, and a plurality of valve cartridges are inserted into the insertion holes. It is premised on a multiple valve device in which the outflow ports of these valve cartridges are communicated with the tank passages and the tank passages are shared by the valve cartridges. On the premise of the above-described device, the present invention is characterized in that the side surface of the tank passage in which the insertion hole is opened is a plane perpendicular to the axis of the insertion hole.

[0007]

According to the present invention, since the insertion hole is opened in the plane of the tank passage, the length of the edge of the opening is at most the circumference of the insertion hole, and the arc e is not formed as in the prior art. The edge length can be shortened by the amount.

[0008]

According to the apparatus of the present invention, the length of the edge of the opening portion of the insertion hole that opens into the tank passage can be made shorter than in the prior art, so that the occurrence of burrs can be reduced accordingly.
Therefore, the probability of the burrs being entrapped in the oil is lower than before, and the adverse effect of the burrs is reduced accordingly.

[0009]

In the embodiment shown in FIGS. 1 to 5, the manifold block 21 is made of aluminum, and the manifold block 21 is drawn out of the pump passage 2 as shown in FIG.
2. The communication groove 23 and the tank passage 24 are integrally formed. The pump passage 22 and the tank passage 24 are formed in a direction orthogonal to the insertion hole 4 into which the valve cartridge 5 is inserted, as in the related art. The communication groove 23
Is formed over the entire length along the bottom of the pump passage 22 as shown in FIG.
2 and one constitutes substantially one flow path.

The tank passage 24 has a substantially square cross section, and the side surface of the tank passage 24 where the insertion hole is opened is a plane 30 orthogonal to the axis of the insertion hole 4.
Since the flat surface 30 is formed in the tank passage 24, the edge E of the opening is equal to the circumference of the insertion hole 4 as shown in FIG. In other words, since the arc e cannot be formed unlike the conventional case, the length of the edge E can be shortened accordingly. The other configuration is the same as that of the related art, and the valve cartridge 5 is inserted into the insertion hole 4 and each valve cartridge 5 is inserted.
Is communicated with the communication groove 23.

In this embodiment, however, as shown in FIG.
6, and the periphery of the portion corresponding to the tank passage 24 is formed as a small diameter portion 27 which is narrower than the other portions. The reason why the concave portions 25 and 26 and the small diameter portion 27 are formed in the manifold block 21 is as follows. For example, if another member or the like comes into contact with the outer surface of the manifold block 21 to form a dent, the periphery of the dent may rise. However, this swelling becomes an obstacle when the manifold block 21 is accurately placed on a horizontal surface or the like, or when it comes into close contact with another member.

Therefore, in this embodiment, in order to reduce the contact area on the outside of the manifold block 21, the concave portions 25 and 26 and the small diameter portion 27 are formed. This is to prevent such a failure from occurring. However, in the recess 26, the centers of the projections 28 and 29 formed on both sides thereof are located outside the centers of the actuator ports A and B.
Thus, when cutting the actuator ports A and B while placing the block 21 on a table (not shown), the block 21 can be stabilized.

Next, the operation of this embodiment will be described. When the pressure fluid is supplied to the pump passage 22, the pressure fluid naturally flows to the communication groove 23 as well. In other words, the pump passage 22 and the communication groove 23 integrally constitute substantially one flow path. Therefore, the flow passage area of the pump passage 22 is increased by the flow passage area of the communication groove 22, and the pressure loss is reduced accordingly. Also,
Since the pump passage 22 itself is not enlarged in order to reduce the pressure loss, the pump passage 22 does not interfere with the actuator ports A and B.

In this embodiment, the manifold block 21 is made of aluminum and is drawn. However, the material and the processing method may be any. For example, while cutting the pump passage 22, it is also possible to cut the communication groove 23 so as to partially overlap the pump passage 22. However, there is an advantage in that the drawing using an aluminum material does not adversely affect the operation of the valve since burrs and the like do not occur when the cutting is performed.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is an end view of the manifold block.

FIG. 4 is a perspective view of a state cut from a line IV-IV in FIG. 3;

FIG. 5 is an explanatory diagram showing an opening state of an insertion hole with respect to a tank passage.

FIG. 6 is a plan view of a conventional multiple valve device.

FIG. 7 is a cross-sectional view of the related art.

FIG. 8 is a conventional explanatory view showing an opening state of an insertion hole with respect to a tank passage.

[Code] 4 insertion hole 5 valve cartridge 9 inflow port section 21 manifold block 22 pump passage E edge

Continuation of front page (72) Inventor Hikaru Murata World Trade Center Building Kayaba Industry Co., Ltd. 2-4-1 Hamamatsucho, Minato-ku, Tokyo (58) Fields investigated (Int. Cl. ⁷ , DB name) F16K 27 / 00-31/122 F15K 11/00

Claims (1)

(57) [Claims] A pump block and a tank passage are formed in a manifold block, a plurality of insertion holes intersecting the tank passage are formed, a plurality of valve cartridges are incorporated in the insertion holes, and the outflow of each of the valve cartridges is performed. In a multiple valve device in which a port is communicated with the tank passage and the tank passage is shared for each valve cartridge, the side surface of the tank passage in which the insertion hole is opened has a plane orthogonal to the axis of the insertion hole. Multiple valve equipment.