JPS63152779A - Rotary valve for pressurized fluid path - Google Patents

Abstract

PURPOSE:To supply quickly a small amount of pressurized fluid intermittently by coupling a cylindrical valve element with the drive shaft of a swing means through a swing center setting means. CONSTITUTION:A supply port 11 and a return port 13 are arranged dislocated in the opposite sides to each other about the line X-X passing a discharge port 12, and a valve groove 21 partially ring-shaped is provided at the periphery of a cylindrical valve element 2, wherein said valve groove is so long as enough to put the supply port 11 in communication with the discharge port 12. A swing center angle setting means 4 is to set the relative locational relationship of the drive center of the drive shaft 30 of swing means 3 with the swing center of the cylindrical valve element 2 of rotary valve, wherein an extension shaft 31 can be coupled with the drive shaft 30 by a pin 34 in a desired relative angle position.

Description

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

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

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

In the above-mentioned known technology, since the connection with the supply port is made by sliding in the axial direction, it is not suitable for rapidly and frequently repeating connection and disconnection.

0 OBJECTS OF THE INVENTION AND MEANS FOR ACHIEVING THE OBJECTS An object of the present invention is to solve the above-mentioned problems of the known technology by making it possible to quickly and frequently disconnect and disconnect the supply of pressurized fluid.
It is possible to freely control the supply amount to a desired set amount.

The present invention provides a cylindrical valve body (2) having a valve groove (21) formed on the circumferential surface of the cylindrical body, and a cylindrical valve body (2) that rotatably supports the cylindrical valve body (2) in a sealed state. ) valve groove (21
) is provided with a valve housing (+1) having a supply port (Ill), a discharge port (12), and a return port (+3) that are open at a position where it can communicate with the supply port ( If) and the discharge port (I2), and the supply port (+1) and the discharge port (12) are alternately disconnected, and the cylindrical valve body (2) and the swinging means (
3) is connected to the drive shaft (30) via the swing center setting means (4), so that the supply time of pressurized fluid during one swing can be freely changed.

O Example The example shown in the drawings shows a case where the present invention is implemented as a valve mechanism of an adhesive application mechanism. and a cylindrical valve body (2) having a cylindrical shape fitted into the valve chamber (11).

The discharge port (12) of the valve housing (11) communicates with the flow path (bl) in the nozzle member (Bl) and communicates with the supply port (11).
) and the return port (13) respectively communicate with the flow path (CI> (C2)) in the pipe connecting member (C), and the pipe (
It communicates with a pressure pump (not shown) and an adhesive tank (not shown) via a pressure pump (not shown).

The above-mentioned supply port (11), discharge port (12), and return port (13) are connected to the supply port (11) and return port ( 13) are arranged offset in opposite directions to each other, and have a length sufficient to communicate the supply port (11) and the discharge port (12) on the circumferential surface of the cylindrical valve body (2). A partial ring-shaped valve groove (21) is provided, and a cylindrical valve body (
2), as shown in Fig. 3, the supply port (11) and the discharge port (12) are connected (supply) (Fig. 0), and the supply port (11) and the return port (13) are connected. The valve operates by changing the supply to the communication line and shutting off the supply (Figure b). In addition, all ports (11) (121(
13) are mutually isolated, and the discharge port (12) and return port (13) are placed in communication with each other.
1) (12) (13) mutual positional relationship and valve groove (2)
1) You can also set the length. The above-mentioned cylindrical valve body (
2) The valve chamber (located in Al, and its circumferential surface facing the valve housing (
The cylindrical valve body (2) is made rotatable by sliding on the inner circumferential surface of the cylindrical valve body (2), and the shaft part (22) integrally protrudes from the negative face of the cylindrical valve body (2), and the shaft part (22) integrally protrudes from the other face of the cylindrical valve body (2). The protruding shaft part (
23), bearing (241 (25), rubber ring (26)
) (27) and ring shims (28) and (29), the valve housing (2) is rotatably supported.

An extension shaft (31) integrated with the shaft (22) is interlocked with a drive shaft (30) through a cylinder (32), and the drive shaft (30) is connected to the swinging means (3) through a 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 (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).

Although the above-mentioned change in the relative angular position is performed manually, in the embodiment shown in FIG. Used for adjusting the relative zero position with the valve body (2).

Referring to Fig. 8, power type swing center angle setting means (4°)
is a drive shaft (30) that transmits power to the cylindrical valve body (2) of the rotary valve (A), an intermediate shaft (40) that transmits power to the swinging means (3) described below, and a drive helical gear (41) and a driven helical gear. (42), and the driven helical gear (42) is spline-engaged with the drive shaft (30) to be freely movable in the axial direction, and by the axial movement of the driven helical gear (42), the intermediate shaft (40) ) and independently the drive shaft (30)
The sliding body (44) integrated with the support (43) of the drive helical gear (42) is screwed onto the screw shaft (45), and the driven helical gear (45) is rotated by the rotation of the screw shaft (45). 42) is configured to move in the axial direction, and is provided with a controllable drive means (46) such as a servo motor that is transmitted to the screw shaft (45), and the drive means (46) is controlled, for example, by electrical control of the servo motor. The drive shaft (30) is configured to be rotatable relative to the intermediate shaft (40) by a predetermined angle.

The rocking means (3) includes an oscillating drive,
Various cam mechanisms such as barrel cams and other electric drive mechanisms can be used.

In addition, by directly or indirectly connecting 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 and the discharge time of any pressurized fluid can be set. It is possible.

The extension shaft (31) and the transmission gear or pulley are connected to an electric swing drive means (3″) such as a servo motor or a pulse motor.
The cylindrical valve body (2) can also be directly connected to the output shaft of the valve body and configured to swing at a desired swing angle by electrical control of a servo motor or the like.

In addition, a second extension shaft (31") is provided that protrudes to the opposite side of the extension shaft (11), and is connected to the extension shaft of another rotor tower valve via an appropriate transmission means to provide a single drive. Axis (30
) can also be configured to drive a plurality of rotary valves via 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, 90@).

As the cylindrical valve body (2) swings, Fig. 3(a) 2(b)
), the supply port (Ill) and the discharge port (12) are blocked, and the supply port (11)
and a return port (13) [the supply of pressurized fluid and adhesive to the nozzle (B) is stopped, and the return port (13) circulates the pressurized fluid through the tank].

FIG. 3(a) g (For the β angle between c1, the supply port (11) and the discharge port (I2) are communicated (pressurized fluid or adhesive is supplied to the nozzle (B))].

In other words, the ON/OFF continuous switching action of the rotary valve (
Due to valve action), (a) → (e3
→ Pressurized fluid (adhesive) is intermittently supplied to the nozzle only in the 2β° section of (A), and (a) → (bl → 2α of (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 that allows the swing angle to be freely selected from 20' to +20', so it can be easily changed as shown in FIG.

Furthermore, the supply state shown in FIG. 6 can also be changed by changing the swing speed of the cylindrical valve (1) by controlling the speed of a servo motor or the like connected to the swing means (3).

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

Even if the swinging angle by the swinging means (3) is constant (for example, 90"), the swinging angle may be fixed (for example, 90"), but the swinging angle may be fixed (for example, 90") in the child direction or one direction, centered on the position (virtual 0 point between the drive shaft and the rotary valve) corresponding to FIG. 3 (al). By shifting the relative angular position in the 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.

The supply amount can be controlled mechanically using the setting center setting means (4) and the mechanical swinging means (cam means), and maintenance work is facilitated by eliminating the need for electrical knowledge when adjusting the supply amount of pressurized fluid. However, when an electric swinging means is provided, the swinging angle of the cylindrical valve body is changed by electrical control, for example, by speed control of a servo motor, etc., to control the supply timing and supply of pressurized fluid. By incorporating the rotary valve of the present invention into an automatic adhesive control device, it is possible to change the amount of adhesive (change the length of adhesive application), and the conveyance speed of the adhered object.

It can automatically respond to changes in the required coating amount due to changes in adhesive length and width.

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 create a floating state, and the sealing effect prevents leakage of pressurized fluid. , 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 allows rapid and frequent valve action on pressurized fluid to be achieved, and has the effect of quickly supplying small amounts of pressurized fluid intermittently.

Furthermore, there is an effect that the supply amount can be easily adjusted by operating the swing center setting means (4).

[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. A schematic diagram showing changes in the supply amount (coating amount) due to changes in .
4! 2 is a schematic diagram showing changes in cloth position). FIG. 7 is a schematic diagram showing the operation of the swing center setting means. FIG. 8 is a sectional view showing the power type swing center setting means. 1... Valve housing 2... Cylindrical valve body 3... Rocking means 4... Rocking center setting means 11... Supply port 12...Discharge port 13...Return port 21...Valve groove 30...Drive shaft applicant Suntool Co., Ltd. Figure 2 X (a) -'i! F Colonel 1 7th SmtlhoJ+= Nt'rJ FIl tube'fru(
z) and the discharge pulse of valve breaking τθ (12 liters of shoulder January 1σ)

Claims (1)

[Claims] A cylindrical valve body (with a valve groove (21) formed on the circumferential surface of the cylindrical body)
2), a supply port (11) that rotatably supports the cylindrical valve body (2) in a sealed state, and opens at a position where it can communicate with the valve groove (21) of the cylindrical valve body (2), and a discharge port (
A valve housing (1) having a return port (12) and a return port (13) is provided, and the cylindrical valve body (2) is swung to establish communication between the supply port (11) and the discharge port (12), and a return port (13). ) and the discharge port (12) are alternately cut off, and the cylindrical valve body (2) and the drive shaft (
30) via a swing center setting means (4), thereby making it possible to freely change the supply time of pressurized fluid during one swing.