JPH11336920A - Valve plate structure of passage selector valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the valve plate structure of a passage selector valve which can select smoothly while keeping a sufficient air-tightness and liquid-tightness, even when a foreign article is mixed in a working fluid and infiltrated into a slide surface. SOLUTION: In a valve casing 10, in the valve plate structure of a passage selector valve A, in which a movable valve plate 30 having second communication holes 37, 38 is slidably contacted with the fixed valve seat 12 having first communication holes 19, 20 and the first communication holes 19, 20 is matched with the second communication holes 37, 38 by the communication of a slide motion and the flow route can be selected by making to the non-matched state, the movable valve plate 30 is formed by a slide contact plate 31 consisting of an elastic material having both softer hardness than the foreign article invaded in the slide surface 33 and a high anti-wear property and a rigid reinforcement plate 32 integrally stuck to the back of the slide contact plate 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve plate structure of a flow path switching valve used for forcing compressed air containing minute foreign matter into an actuator of various devices, particularly an actuator of a vertical binding dispenser.

[0002]

2. Description of the Related Art Conventionally, for example, as one form of a flow path switching valve provided for the above-mentioned purpose, as shown in FIGS. There is a flow path switching valve B used as a machine dispenser switching valve. As shown, the valve casing 10 is
A mounting substrate 11 is provided at a lower portion, and a fixed valve seat 12 is provided at an upper portion.
And a cap-shaped upper casing 14 with a lower end opening placed on the lower casing 13. A valve plate storage space 15 is formed on the fixed valve seat 12. I have.

A movable valve plate 16 is mounted in the valve plate storage space 15 so as to be rotatable around a pivot 17, and the sliding surface forming the lower surface of the movable valve plate 16 forms the upper surface of the fixed valve seat 12. It is slidably in contact with the sliding surface. The movable valve plate 16 is operatively connected to a rotating shaft 16a rotatably mounted on an upper wall of the upper casing 14, and the rotating shaft 16a is connected to a rotating motor 16b fixed to the upper wall of the upper casing 14.
Of the driving shaft 16c.

In the above-described configuration, as shown in FIG. 7, an air inlet 18 is formed in the peripheral wall of the upper casing 14, and compressed air flows into the valve plate housing space 15 through the air inlet 18.

On the other hand, as shown in FIGS. 7 and 8, the fixed valve seat 12 is provided with air outlets 19 and 20 as one example of the first communication holes at 180 ° symmetrical positions. An exhaust port 21 is provided at a circumferentially intermediate position between the outlets 19 and 20. The air outlets 19 and 20 are connected to an actuator of a vertical binder dispenser (not shown).

[0006] Also, on the periphery of the lower surface of the movable valve plate 16,
As shown in FIG. 7 and FIG.
A pair of arc-shaped communication grooves 22 and 23, which are communication holes, are formed. The movable valve plate 16 is provided with a communication hole 24 that connects the center of the communication groove 22 with the valve plate storage space 15. The operation of the flow path switching valve B having the above configuration will be described. When the actuator shown in FIG. 8A is stopped, the communication hole 24 communicating with the air inlet 18 is
It does not communicate with any of the air outlets 19 and 20. Therefore, no compressed air is supplied to the actuator.

Next, as shown in FIG. 8B, when the rotary motor 16b is driven to rotate the movable valve plate 16 in the direction of the arrow X, the communication hole 24 communicating with the air inlet 18 becomes the air outlet 19. The air outlet 20 communicates with the exhaust port 21. Therefore, by supplying compressed air to the actuator through the air outlet 19, the actuator can be moved forward or backward or rotated in a certain direction.

Further, as shown in FIG. 8C, when the rotary motor 16b is driven to rotate the movable valve plate 16 in the direction of the arrow Y, the communication hole 24 communicating with the air inlet 18 is connected to the air outlet 20. The air outlet 19 communicates with the exhaust port 21. Therefore, by supplying compressed air to the actuator through the air outlet 20, the actuator can be moved forward or backward or rotated in the opposite direction.

By the way, in the flow path switching valve B having the above configuration, the fixed valve seat 12 is mainly formed of cast steel and the movable valve is formed in order to ensure that the movable valve plate 16 slides smoothly on the fixed valve seat 12. In many cases, the plate 16 has a valve plate structure mainly made of phosphor bronze, which is a material softer than cast steel.

[0010]

However, the valve plate structure of the flow passage switching valve B has the following problems to be solved. That is, since the fixed valve seat 12 and the movable valve plate 16 are both metal, when the movable valve plate 16 is slid in contact with the fixed valve seat 12, the metal is in local contact with each other. If the uneven wear of the plate 16 becomes significant, it becomes difficult to maintain an airtight state between the two. Therefore, it is necessary to frequently replace the movable valve plate 16. Further, as schematically shown in FIG.
When the foreign matter 25 enters between the sliding surfaces of the movable valve plate 16 and the fixed valve seat 12, the gap between the sliding surfaces becomes large, and the original function as the flow path switching valve B cannot be achieved. It becomes possible.

The present invention has been made in view of such circumstances, and provides sufficient airtightness and liquid tightness even when minute foreign matter is mixed in a working fluid such as compressed air and enters a sliding surface. An object of the present invention is to provide a valve plate structure of a flow path switching valve capable of performing a smooth switching operation while holding the same.

[0012]

According to the present invention, there is provided a semiconductor device comprising:
According to the valve plate structure of the flow path switching valve described above, the movable valve plate having the second communication hole is slidably abutted against the fixed valve seat having the first communication hole in the valve casing. In the valve plate structure of a flow path switching valve capable of switching a flow path by aligning or disabling the first communication hole and the second communication hole in conjunction with an operation, the movable valve plate A sliding contact plate made of an elastic material having both softness and high abrasion resistance, which is softer than foreign matter entering the sliding surface, and a rigid reinforcing plate integrally fixed to the back of the sliding contact plate Formed by Here, the foreign matter generally refers to dust that passes through a filter of the strainer, shavings generated by rubbing between metals, and the like.

According to a second aspect of the present invention, the valve plate structure of the flow path switching valve includes:
2. The valve plate structure for a flow path switching valve according to claim 1, wherein said sliding contact plate is formed of monomer cast nylon.
The valve plate structure of the flow path switching valve according to claim 3 is the valve plate structure of the flow path switching valve according to claim 1 or 2, wherein the sliding contact plate and the rigid reinforcing plate are provided by a dovetail fitting. They are integrally connected.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

First, with reference to FIG. 1, an overall configuration of a flow path switching valve A having a valve plate structure of a flow path switching valve according to an embodiment of the present invention will be described. As shown in FIG. 1, the flow path switching valve A according to the present embodiment has the same configuration as the flow path switching valve B described in the related art except for the valve plate structure of the flow path switching valve described below. Therefore, the same components are denoted by the same reference numerals, and the description of those components is omitted.

As shown in FIGS. 1 to 3, in this embodiment, a movable valve plate 16 made of a single material in the prior art is used.
Unlike this, the movable valve plate 30 corresponding to the movable valve plate 16 has a two-part structure including two members made of different materials. That is, in the present embodiment, FIGS.
As shown in (1), the movable valve plate 30 is configured by integrally connecting and fixing a sliding contact plate 31 and a rigid reinforcing plate 32 having the same diameter and substantially the same thickness in a stacked state.

Here, as shown schematically in FIG. 4, the sliding abutment plate 31 is made of fine foreign matter 34 which enters a sliding surface 33 formed between the fixed valve seat 12 and the movable valve plate 30. It is made of an elastic material having both soft hardness and high wear resistance. As such an elastic material, various materials can be considered. Nylon, which is excellent in abrasion resistance, conforms to the fixed valve seat 12 and can easily and elastically wrap the foreign matter 34, particularly,
It is desirable to use monomer cast nylon (MC nylon).

On the other hand, the rigid reinforcing plate 32 is
In order to impart sufficient rigidity to the sliding contact plate 31, it is integrally fixed to the back of the sliding contact plate 31, and various materials can be considered as this material. It is preferable to use a rolled steel material for general structural use (for example, SS400) which can be obtained at a low price while having the above. However, it is not limited to this material at all, for example,
Cast iron, cast steel, stainless steel, or the like can also be used.

In the present embodiment, the sliding contact plate 31 and the rigid reinforcing plate 32 are integrally connected by a groove fitting. That is, as shown in FIG. 2 and FIG.
A long groove 35 extending in the radial direction is formed on the joining surface of the, and the long groove 35 protrudes from the joining surface of the sliding contact plate 31 so as to extend in the radial direction. Long ridge 36
Is inserted. With this configuration, the sliding contact plate 3
The strength of the connection between the rigid reinforcing plate 32 and the rigid reinforcing plate 32 by the adhesive can be further increased, and when the rigid reinforcing plate 32 is rotated, the sliding contact plate 31 can also be reliably rotated integrally.

The movable valve plate 30 comprising the sliding contact plate 31 and the rigid reinforcing plate 32 in the present embodiment is also similar to the movable valve plate 16 made of a single material in the prior art, as shown in FIGS. As shown in the figure, a pair of arc-shaped communication grooves 37 and 38 as an example of the second communication hole are provided at the 180 ° symmetrical position on the peripheral edge of the lower surface. In addition, the movable valve plate 30
A communication hole 39 is also provided for communicating the central portion of the communication groove 37 with the valve plate storage space 15.

As shown in FIGS. 2 and 3, a connection projection 40 for interlocking the movable valve plate 30 to the rotary shaft 16a is provided at the center of the rigid reinforcing plate 32. As shown in FIG.

Next, the operation of the flow path switching valve A having the valve plate structure of the flow path switching valve having the above configuration will be described. In a state where the actuator is stopped, that is, in a valve closed state, the communication groove 37 communicating with the air inlet 18 does not communicate with any of the air outlets 19 and 20. Therefore, no compressed air is supplied to the actuator.

Next, when the rotary motor 16b is driven to rotate the movable valve plate 30 in a predetermined direction, the communication groove 37 communicating with the air inlet 18 communicates with the air outlet 19, and the air outlet 20 is connected to the exhaust port. Connect to 21. Therefore, the air outlet 19
By supplying compressed air to the actuator through the actuator, the actuator can be moved forward or backward or rotated in a certain direction.

On the other hand, when the rotary motor 16b is driven to rotate the movable valve plate 30 in a direction opposite to the above-described direction, the communication groove 37 communicating with the air inlet 18 communicates with the air outlet 20, and the air outlet 20 is opened. 19 communicates with the exhaust port 21. Therefore,
By supplying compressed air to the actuator through the air outlet 20, the actuator can be moved back and forth or rotated in the opposite direction.

In the operation of the flow path switching valve A, the sliding surface 33 of the sliding contact plate 31 of the movable valve plate 30 slides and contacts the sliding surface 33 of the fixed valve seat 12. In this embodiment, the sliding contact plate 31 is made of a monomer cast nylon (MC nylon) or the like that has excellent wear resistance and has good conformability with the fixed valve seat 12. Therefore, the airtightness of the sliding surface 33 can be sufficiently ensured. Also, as schematically shown in FIG.
Even if a minute foreign matter 34 contained in the compressed air enters between the movable valve plate 30 and the sliding surface 33 of the fixed valve seat 12, the sliding contact plate 31 retains the foreign matter 34 due to its elasticity. Can be easily and elastically wrapped, so that the airtightness of the sliding surface 33 can be sufficiently ensured.

In order to further improve the airtightness between the movable valve plate 30 and the fixed valve seat 12, the sliding surface 3 of the fixed valve seat 12
It is necessary to improve the finishing accuracy of the sliding surface 33 of the movable valve plate 30, that is, the finishing accuracy of the sliding surface 33 of the sliding contact plate 31, as well as to improve the finishing accuracy of No. 3. In this case, by using the polishing device 41 as shown in FIG. 5, the finishing accuracy of the sliding surface 33 of the movable valve plate 30 can be easily increased.

As shown in FIG. 5, the polishing apparatus 41 includes a paper grindstone (# 400 to # 8)
00) 43 is mounted. Above the workpiece mounting table 42, a workpiece mounting shaft 45 rotated by a rotary motor 44 is provided. The rotary motor 44 and the object-to-be-polished mounting shaft 45 are attached to the front end of a support boom 47 whose base is attached to the column 46 so as to be able to move up and down. With this configuration, the sliding abutment plate 31, which is the object to be polished, is attached to the tip of the object mounting shaft 45, and the support boom 4
7 and by driving the rotary motor 44, the sliding surface 33 of the sliding contact plate 31 can be efficiently finished with sufficient surface roughness.

[0028]

EXAMPLE As shown in FIGS. 6 (a) to 6 (f), a plurality of movable valve plates 48 to 53 having different materials and configurations were prepared, and these were assembled into a flow path switching valve. An experiment was conducted by flowing factory air containing impurity particles shown in (1) as foreign matter through the flow path switching valve. Further, based on the experimental results, the sealing performance and workability of the valve plate structure of the flow path switching valve were examined, and the overall evaluation including the cost was performed. The results are shown in Table 2.

The movable valve plate 48 is entirely formed of phosphor bronze, the movable valve plate 49 is entirely formed of an aluminum alloy, and the movable valve plate 50 is entirely formed of MC nylon. The movable valve plate 51 is formed by integrally connecting a sliding contact plate made of bakelite to a rigid reinforcing plate made of phosphor bronze using an adhesive, and the movable valve plate 52 is made of a rigid reinforcing plate made of phosphor bronze. A sliding contact plate made of MC nylon is integrally connected to the plate using an adhesive, and a movable valve plate 53 is a sliding contact plate made of MC nylon on a rigid reinforcing plate made of a rolled steel material for general structure. The plates are integrally connected using an adhesive. The sliding surfaces of the movable valve plates 52 and 53 are formed with spigots (elongated grooves and elongated projections) made of concave and convex parts that fit each other.

[0030]

[Table 1]

[0031]

[Table 2]

As is clear from Table 2, the movable valve plates 52 and 53 corresponding to the valve plate structure of the flow path switching valve according to the present invention are:
It was good in all aspects of cost, sealability, and workability. In particular, the movable valve plate 53 was found to be extremely good in its overall evaluation.

As described above, the present invention has been described with reference to an embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and is described in the claims. It also includes other embodiments and modifications that can be considered within the scope of the matters described.

[0034]

According to the valve plate structure of the flow path switching valve according to the first to third aspects, the movable valve plate is made of an elastic material having both hardness and high abrasion resistance, which are softer than foreign substances entering the sliding surface. And a rigid reinforcing plate integrally fixed to the back of the sliding contact plate. Therefore, even when minute foreign matter contained in the compressed fluid enters between the sliding surfaces of the movable valve plate and the fixed valve seat, the sliding abutment plate easily elastically removes the foreign matter by its elasticity. Since it is possible to enclose the sliding surface, airtightness on the sliding surface can be sufficiently ensured. In addition, since the wear of the sliding contact plate due to foreign matter can be effectively prevented, the life of the sliding contact plate and the fixed valve seat can be extended, and the maintainability can be improved.

In particular, in the valve plate structure of the flow path switching valve according to the second aspect, the sliding contact plate is excellent in abrasion resistance, adapts to the fixed valve seat, and easily elastically removes foreign matter. Because it was formed from a monomer cast nylon that can be wrapped,
The airtightness on the sliding surface can be further ensured.

In the valve plate structure of the flow path switching valve according to the third aspect, the sliding contact plate and the rigid reinforcing plate are integrally connected by groove fitting. The connection strength of the rigid reinforcing plate with the adhesive can be further increased, and when the rigid reinforcing plate is rotated, the sliding contact plate can also be reliably rotated integrally.

[Brief description of the drawings]

FIG. 1 is a front cross-sectional view showing an entire configuration of a flow path switching valve to which a valve plate structure of a flow path switching valve according to an embodiment of the present invention is applied.

FIG. 2 is a partial front sectional view of a movable valve plate forming a valve plate structure of a flow path switching valve according to one embodiment of the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is an explanatory diagram showing a foreign matter intrusion state when the valve plate structure of the flow path switching valve according to the embodiment of the present invention is operated.

FIG. 5 is a side view of a polishing apparatus for polishing a movable contact plate constituting a valve plate structure of a flow path switching valve according to one embodiment of the present invention.

FIG. 6 is a diagram illustrating the configuration of a movable valve plate used in an experiment.

FIG. 7 is a front sectional view showing the overall configuration of a flow path switching valve having a valve plate structure of a conventional flow path switching valve.

FIG. 8 is an operation explanatory view of the flow path switching valve.

FIG. 9 is an explanatory view showing a foreign matter intrusion state when the conventional valve plate structure of the flow path switching valve is operated.

[Explanation of symbols]

A flow path switching valve B flow path switching valve 10 valve casing 11 mounting board 12 fixed valve seat 13 lower casing 14 upper casing 15 valve plate storage space 16 movable valve plate 16a rotation shaft 16b rotation motor 16c drive shaft 17 pivot 18 air inlet 19 air outlet (first communication hole) 20 air outlet (first communication hole) 21 exhaust port 22 communication groove (second communication hole) 23 communication groove (second communication hole) 24 communication hole 25 foreign matter Reference Signs List 30 movable valve plate 31 sliding contact plate 32 rigid reinforcing plate 33 sliding surface 34 foreign matter 35 long groove 36 long ridge 37 communication groove (second communication hole) 38 communication groove (second communication hole) 39 Communicating hole 40 Connecting projection 41 Polishing device 42 Workpiece mounting table 43 Paper grindstone 44 Rotary motor 45 Workpiece mounting shaft 46 Support post 47 Supporting boom 48 Movable valve plate 49 Movable valve plate 50 Movable valve plate 51 Movable valve plate 52 Movable valve plate 53 Movable valve plate

Claims (3)

[Claims] In a valve casing, a movable valve plate having a second communication hole is slidably abutted against a fixed valve seat having a first communication hole, and the movable valve plate having the second communication hole is slidably contacted. In a valve plate structure of a flow path switching valve capable of switching a flow path by aligning or disabling a first communication hole and the second communication hole, the movable valve plate invades a sliding surface. A sliding contact plate made of an elastic material having both softness and high abrasion resistance, and a rigid reinforcing plate integrally fixed to the back of the sliding contact plate. The valve plate structure of the flow path switching valve. 2. The valve plate structure for a flow path switching valve according to claim 1, wherein said sliding contact plate is formed of monomer cast nylon. 3. The valve plate structure of a flow path switching valve according to claim 1, wherein said sliding contact plate and said rigid reinforcing plate are integrally connected by dovetail fitting.