JPS63152780A - Rotary valve for pressurized fluid path - Google Patents

Abstract

PURPOSE:To provide quick and high frequency valve operation by forming openings of an input port, an output port, and a return port at a point possible to have communication with a valve groove of cylindrical valve element. CONSTITUTION:A rotary valve A is composed of a valve housing 1 in which a cylindrical valve chamber is formed, and a valve body 2 in the form of cylinder fitted in said valve chamber. The discharge port 12 of this valve housing 1 is in communication to a flow path b inside a nozzle member B, and a supply port 11 and return port 13 are in communication with flow paths C1 and C2, respectively, within a pipe connecting member C. A valve groove 21 in the form of partial ring having a sufficient length to put the supply port 11 in communication with the discharge port 12 is provided at the periphery of the valve element 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a valve mechanism for connecting and disconnecting the supply of pressurized fluid in a pressurized fluid path. . For example, it relates to a fluid distribution mechanism interposed between a source of pressurized fluid and a nozzle in a fluid applicator.

○ Conventional technology and its problems As a valve mechanism (fluid distribution mechanism) for pressurized fluid channels,
No. 5-44672 ``Fluid applicator'' is known. In the fluid distribution mechanism of the device, the valve member slides axially.

Furthermore, generally in a valve mechanism of a hydraulic circuit, a valve body within a valve housing is slid in the axial direction.

In the above-mentioned known technology, since the connection with the inlet port is shut off by sliding in the axial direction, it is unsuitable for rapidly and frequently repeating connection and disconnection.

OObjects of the present invention and means for achieving the objects The present invention includes:
In order to solve the above-mentioned problems of the known technology, the present invention aims to provide a valve mechanism suitable for quick and frequent connection and disconnection, and to facilitate the work of changing and adjusting the discharge amount and discharge timing of pressurized fluid. be.

The first invention of the present application includes a cylindrical valve body (2) formed with a valve groove (21) formed on the circumferential surface of the cylindrical body, and a cylindrical valve body that rotatably supports the cylindrical valve body (2) in a sealed state. (2) The inlet port (11) opens at a position where it can communicate with the valve groove (21).
), a valve housing (1) with an outlet port (12) and a return port (!3), and rocking means (3) for rocking the cylindrical valve body (2). Provide rotary valves.

A second invention of the present application provides a variable speed drive means (5) for the swinging means.
Drive with.

O Embodiment The embodiment shown in the drawings shows a case where the present invention is implemented as a valve mechanism of an adhesive application mechanism, and a rotary valve (A) is installed in a valve housing (with a cylindrical valve chamber (a) formed therein). 1), and a cylindrical valve body (2) fitted into the valve chamber (11).

The discharge port (12) of the valve housing (1) communicates with the flow path (b) in the nozzle member (Bl) and is connected to the supply port (11).
The return port (13) communicates with the flow path (C11 (C2)) in the pipe connecting member (C), and connects to a pressure pump (not shown) and an adhesive tank (not shown) via a vibrator (not shown). are connected to each other.

The above-mentioned supply port (11), discharge port (12) and return port (13) are connected to the supply port (11) with respect to the line
and a return port (13) are arranged to be offset in opposite directions, and a supply bow (11) is arranged on the circumferential surface of the cylindrical valve body (2).
A partial ring-shaped valve groove (21) having a length sufficient to communicate with the discharge port (12) is provided, and as the cylindrical valve body (2) swings, the valve groove (21) is opened as shown in FIG. , the supply port (11) and the discharge port (12) are changed to communicate with each other (see Figure b) for valve action.

In addition, if necessary, all ports (111 (12)
(13) are mutually isolated, and the discharge port (12) and the return port (13) are placed in communication with each other.
Ill (121 (13)) and the valve groove (2
1) You can also set the length. The above-mentioned cylindrical valve body (
2) is inside the valve chamber (a), and its peripheral surface is the valve housing C.
The cylindrical valve body (2) is made rotatable by sliding on the inner peripheral surface of the cylindrical valve body (2), and the detail (22) integrally protrudes from the negative face of the cylindrical valve body (2) and the other face integrally protrudes from the other face. The shaft part (
23), bearing (241 (25+), rubber ring (26
) (27) and a ring shim (281 (291), it is rotatably supported by the valve housing (2).

An extension shaft (31) integrated with the shaft (22) is interlocked with the drive shaft (30) through the cylinder (32), and the outer movement shaft (30) is connected to the swinging means (3) through the joint (35). ) to drive the cylindrical valve body (
2) is configured to rotate (swing) intermittently. □′
Next, the swing center angle setting means (4) will be explained.

The swing center angle setting means (4) determines the drive center position N (or swing drive starting point position) of the drive shaft (30) of the swing means (3);
This is to set the relative positional relationship with the swing center position (or swing start point position) of the cylindrical valve body (2) of the rotary valve, and in the embodiment shown in FIG. The cap (
A cap (
32) and the cylindrical body (33) are relatively rotatable, and the extension shaft (31) and the drive shaft (30) can be freely connected at a desired relative angular position by means of a pin (34).

The rocking means (3) includes an oscillating drive,
Although mechanical rocking means such as various cam mechanisms such as a barrel cam are used, it is also possible to use an electric rocking means or other intermittent drive means, which will be described later.

In addition, by directly or indirectly connecting a variable speed drive means (for example, a servo motor or other speed control motor) (5) to the input shaft of the cam mechanism, the rotational movement of the rotary valve can be controlled. The discharge time of pressurized fluid can be set.

A gear or pulley that transmits the extension shaft (31) is directly connected to the output shaft of an electric swinging means (3°) such as a servo motor or a pulse motor, and the cylindrical valve body ( 2) can also be configured to swing at a desired swing angle.

In addition, a second extension shaft (31°) is provided that protrudes to the opposite side to the extension shaft (11), and is connected to the extension shaft of another rotary valve via an appropriate transmission means to form a single drive shaft ( 30)
It is also possible to configure a plurality of rotary valves to be driven using more power.

Next, the valve action of the rotary valve of the present invention will be explained.

The cylindrical valve body (2) is driven by the swinging means (3) and swings continuously at a predetermined angle (for example, 9°).

As the cylindrical valve body (2) swings, the
Regarding the α angle between 1 and 1, the supply port (11) and the discharge port (12) are blocked, and the supply port (11)
and the return port (13) [the supply of pressurized fluid (adhesive) to the nozzle (B)° is stopped and the return port (13) circulates the pressurized fluid via the tank]
.

Regarding the β angle between FIG. 3 (al g (c)), the supply port (11) and the discharge port (12) are communicated [the nozzle (pressurized fluid is supplied to the adhesive)].

In other words, the ON-OFF continuous switching action of the rotary valve (
(valve action), in one stroke, (a) → (C)
→ Pressurized fluid (adhesive) is intermittently supplied to the nozzle during the 2β° section of (a), and 2α of (a) → (b) → (a)
Supply is stopped in the 0 section.

In addition, the supply section β and the cutoff section α in FIGS. 4 and 5
The selection of the angle (that is, the determination of the supply section and supply timing of the pressurized fluid) is performed by changing the swing angle of the swing means (3) [In the known cam means (oscillating drive),
There is a device in which the swing angle can be freely selected from 120 degrees to 120 degrees], so it can be easily changed as shown in FIG.

Further, by changing the swinging speed of the cylindrical valve (11) by controlling the speed of a servo motor or the like connected to the swinging means (3), the supply state shown in FIG. 6 changes.

Next, the supply amount control by the action of the swing center setting means (4) will be explained.

Even if the rocking angle of the rocking means (3) is constant (for example, 90°), the child will move around the position M (virtual 0 point between the drive shaft and the rotary valve) corresponding to Fig. 3(a). By shifting the relative angular position in one direction or in one direction, the ratio between the discharge (supply) section β and the cutoff section α can be changed, and the supply amount can be changed as shown in FIG.

In the above embodiment, the supply amount can be controlled mechanically by the setting center setting means (4) and the mechanical swing means (cam means), and electrical knowledge is not required to adjust the supply amount of pressurized fluid. Although maintenance work is facilitated by eliminating the need for the swinging means (3), it is possible to replace the swinging means (3) with an electric swinging means (for example, a servo motor,
The output shaft of the pulse motor is oscillated at a desired oscillation angle by controlling the power supply, and the oscillation angle of the cylindrical valve body is changed by controlling the power supply to control the supply timing and amount of pressurized fluid. can be changed (adhesive application length changed),
When the rotary valve of the present invention is incorporated into an automatic adhesion control device, it is possible to automatically respond to changes in the required coating amount due to changes in the conveying speed of the object to be adhered, and changes in bonding length and width.

, 'lj, -y\ When the above-mentioned cylindrical valve body (2) rotates to act as a valve, it is elastically pressed from above and below by the rubber rings (26) and (27) to be in a floating state, and the pressurized fluid is released due to the sealing effect. In addition to preventing leakage of the cylindrical valve body (2), the machining accuracy of the upper and lower surfaces of the cylindrical valve body (2) can be lowered.

O Effects of the Invention Since the present invention is composed of a valve housing and a cylindrical valve body,
The rotary valve structure has the effect of achieving quick and frequent valve action on the pressurized fluid, and also has the effect of allowing the application amount to be arbitrarily set by changing the swing angle of the swing mechanism.

In addition, in the second invention of the present application, by controlling the variable speed drive means, automatic control is performed in response to changes in the object to be supplied with the pressurized fluid (for example, an object to be coated with adhesive) and the frequency of conveyance. There is an effect that the discharge time of the pressurized fluid (adhesive) can be controlled and the supply amount of the pressurized fluid (adhesive application amount) can be automatically set to an appropriate amount.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional plan view showing essential parts of an adhesive application mechanism using a rotary valve according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line S-8 in FIG. 1. Fig. 3 is a schematic diagram showing the valve action of the rotary valve of the present invention, Fig. 4 is a schematic diagram showing the repetition of the supply section and cutoff section in the valve action of Fig. 3, and Fig. 5 is the swing angle of the swing means. FIG. 6 is a schematic diagram showing a change in the supply timing (application amount M) due to a change in the swinging speed of the cylindrical valve body. FIG. 7 is a schematic diagram showing the operation of the swing center setting mechanism (4). 1... Valve housing 2 items... Cylindrical valve body 3... Rocking means 4... Rocking center setting means 5... Variable speed drive means 11... Supply port 12... Discharge port 13... Return port 21... Valve groove 30... Drive shaft applicant Sun Co., Ltd. Tool 1 year old section [ Fig. 2 :=No dog) Interest with Figure 7 (f2) y1 Wang procedure master book (method) % formula % 2, Name of invention Rotary pulp of pressurized fluid path 3, Relationship with amendr case Patent Applicant Address (Residence) 3-8-22 Zuiko, Higashiyodoyo-ku, Osaka City Name Suntool Co., Ltd. Representative Akira Hibino 4, Agent 9, Attached documents

Claims (1)

[Claims] Clause 1: A cylindrical valve body (
2), an inlet port (11) and an outlet port (11) that rotatably support the cylindrical valve body (2) in a sealed state and are open at a position where they can communicate with the valve groove (21) of the cylindrical valve body (2).
12) and a valve housing (1) having a return port (13), and rocking means (3) for rocking said cylindrical valve body (2). Item 2: A cylindrical valve body (21) formed by forming a valve groove (21) on the circumferential surface of the cylindrical body (
2), an inlet port (11) and an outlet port (11) that rotatably support the cylindrical valve body (2) in a sealed state and are open at a position where they can communicate with the valve groove (21) of the cylindrical valve body (2).
12) and a return port (13); a swinging means (3) for swinging said cylindrical valve body (2); and a swinging means (3) for driving said swinging means (3). a pressurized fluid path rotary valve having variable speed drive means (5);