JPH1043658A - Delivery apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely set the valve stroke in a delivery apparatus by making the structures of a delivery valve means and a discharge valve means concentric and making both means possible to slide mutually and adjusting the mutual sliding positions of both valve means by rotating operation of a grip installed in one of the means and making the valve stroke variable. SOLUTION: In this delivery apparatus of a viscous fluid body such as a resin material, at the time of supplying resin to a chamber 14, in non-delivery state, a contracted coil spring 52 urges a discharge valve pipe 32 in the right direction and a discharge valve seat 24 is opened to discharge resin out of a discharge outlet 18. Next, the discharge valve seat 24 is closed by operating an air cylinder mechanism 46 and simultaneously a delivery valve body 26 is opened through a delivery valve shaft 28 to deliver the resin out of a delivery nozzle 20. After that, when the operation air supply is stopped, a discharge valve body part 30 is opened and the resin is turned back to the discharge outlet 18 from the chamber 14. In this case, the position of the air piston 48 and the delivery amount can be adjusted by rotating the stroke adjusting grip nut 64 while pressing a delivery valve grip 68 by a hand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a discharge device, and more particularly to a discharge device suitable for discharging and supplying a viscous fluid such as a resin material or an adhesive.

[0002]

2. Description of the Related Art A discharge device used to discharge a fixed amount of a resin material or the like is made by opening and closing a discharge valve of a material supplied under pressure. In such a discharge device, in order to prevent a viscous fluid such as resin as a supply material from being deteriorated by heat or the like, a second valve that is opened when the discharge valve is closed is provided. A device has been proposed in which material does not stay in the discharge device when the valve is closed. For example, Japanese Utility Model Publication No. 2-15587 discloses, as a discharge device, a discharge head having a chamber with a fluid supply port and a discharge port opened and a discharge nozzle opened, and a discharge valve for opening and closing the discharge nozzle. Means, a second discharge valve means capable of shutting off a flow path between the fluid supply port and the discharge port, and a cylinder piston means attached to the discharge head for driving the valve means to open and close. . By operating the cylinder piston, the discharge valve means having a double shaft structure and the second discharge valve means are simultaneously driven so that the discharge valve is opened and the discharge valve means is simultaneously connected to the fluid supply port and the discharge port. The outlet valve is closed, and conversely, when the discharge valve is closed, the discharge valve means is configured as a so-called flow path switching valve that opens between the fluid supply port and the discharge port.

In this conventional discharge device, the discharge amount can be adjusted by changing the distance between the discharge valve and the discharge valve, and this can be adjusted from the end of the discharge valve on the side of the double-shaft mantle shaft. The end of the discharge valve on the inner shaft side is protruded and a retainer is screwed to the end, and a screw surface is formed on the outer periphery of the end of the discharge valve on the outer shaft side, and an adjusting nut is screwed on the screw surface. The adjustment nut is rotatably assembled to the discharge valve. Therefore, by rotating the adjusting nut, the discharge valve of the mantle can be moved back and forth along the discharge valve, thereby adjusting the stroke of the discharge valve. To open and close the valve, a screw for fixing the piston is engraved on the outer peripheral surface of the discharge valve on the jacket side, and the piston is screwed and fixed to this screw, and the operation of the piston drives the jacket discharge valve and adjusts it. The discharge valve on the center shaft side is driven via the nut.

[0004]

However, in the above-described conventional discharge device, it is difficult to accurately control the discharge amount because the stroke adjustment amount cannot be particularly grasped.
Since the stroke reference point cannot be ascertained, there is a problem that the discharge control amount differs depending on the processing accuracy of the same discharge device, and the same function cannot be provided.

The present invention focuses on the above-mentioned conventional problems, and enables accurate setting of a valve stroke in a discharge device and always has a constant discharge control function without depending on processing accuracy. It is an object of the present invention to provide a discharge device having a structure capable of performing the following.

[0006]

In order to achieve the above object, a discharge apparatus according to the present invention firstly has a chamber in which a fluid supply port and a discharge port are opened and a discharge nozzle is opened. Discharge head, discharge valve means for opening and closing the discharge nozzle, discharge valve means for shutting off a flow path between the fluid supply port and discharge port, and a cylinder attached to the discharge head for driving the valve means to open and close In a discharge device having a piston means, the discharge valve means and the discharge valve means are concentrically slidable with each other, and at least a sliding position of the valve means is rotated by rotating a grip attached to at least one of the discharge means. A zero-point adjustment ring is provided to indicate the sliding reference position between the discharge valve means and the discharge valve means in accordance with the rotation operation of the grip, while making the valve stroke variable so as to be adjustable. It is characterized in.

[0007] More specifically, a discharge head having a chamber with a fluid supply port and a discharge port opened and a discharge nozzle opened, discharge valve means for opening and closing the discharge nozzle, A discharge valve means that can shut off a flow path between a port and a discharge port, and a cylinder piston means that is attached to the discharge head and that opens and closes the valve means, wherein the discharge valve means While slidably mounting the discharge valve means and the piston of the cylinder piston means, both are arranged in tandem via a sliding face plate,
The discharge valve is biased in the valve-opening direction by valve-opening biasing means, and is movable in the valve-closing direction by the operation of the piston. And a zero-point adjustment ring for indicating a reference position for the axial relative position adjustment is provided.

[0008]

According to the above construction, the distance between the discharge valve and the discharge valve is adjusted by the discharge valve means and the discharge valve means or the piston. The axial reference position of the valve position can be set and adjusted by a zero-point adjustment ring. As a result, the same inter-valve distance can be set for the discharge devices having the same structure, and even if there is a variation in processing accuracy, each discharge device can be set to have a common control amount by the zero-point adjustment ring. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a discharge valve device according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a sectional view of the discharge device according to the embodiment, and FIGS. 2 and 3 are a plan view and a bottom view. As shown in the figure, the discharge device 10 has a discharge head 12 at the tip end, and is formed by continuously drilling a small-diameter hole 14S and a large-diameter hole 14L concentrically at the center thereof. Chamber 14 is provided. A supply port 16 for introducing a viscous fluid such as resin to be discharged into the chamber 14 is communicated with the small-diameter hole 14S, and an opening is formed in the large-diameter hole 14L so that the fluid can be discharged from the chamber 14. The discharged outlet 18 is communicated. The supply port 16 and the discharge port 18 are drilled from the side surface of the discharge head 12 and have a small diameter hole 14S and a large diameter hole 14S.
L is set so as to open on each side wall surface. A discharge nozzle 20 is provided on the tip end surface of the discharge head 12 so as to communicate with the inside of the small-diameter hole 14S along the central axis.
A discharge valve seat 22 is attached to the nozzle portion, and can be opened and closed by discharge valve means described later. Further, a discharge valve seat 24 is attached to a step portion between the small-diameter hole 14S and the large-diameter hole 14L, and this is also opened and closed by a discharge valve means described later. Is configured to be able to communicate or block the flow path.

In the discharge head 12, the fluid to be discharged is introduced from the supply port 16 and discharged to the outside through the discharge nozzle 20. When the discharge nozzle 20 is opened due to this discharge action, the discharge is performed. The valve means closes the discharge valve seat 24 between the fluid supply port 16 and the discharge port 18, and conversely, the discharge valve means opens the discharge valve seat 24 when the discharge nozzle 20 is closed. The valve means and the discharge valve means are configured to interlock and switch the flow path.

That is, the discharge valve means includes the discharge valve seat 2.
The discharge valve body 26 is configured to include a discharge valve body 26 that can be moved toward and away from the discharge chamber 2 and a discharge valve shaft 28 to which the discharge valve body 26 is attached, and is disposed along the center axis of the chamber 14. Of course, the discharge valve shaft 28 has a sufficiently smaller diameter than the central opening of the discharge valve seat 24 so that fluid can flow through the outer peripheral portion of the shaft 28. In addition, the discharge valve means includes the discharge valve seat 2.
It is constituted by a cylindrical discharge valve pipe 32 having a discharge valve body portion 30 having a tapered surface formed directly at the tip end so that the flow path can be opened and closed while being brought into contact with and separated from the discharge valve 4. The discharge valve pipe 32 is attached to the outer peripheral surface of the discharge valve shaft 28 via an O-ring so as to be able to slide in close contact therewith.

In order to maintain the chamber 14 of the discharge head 12 in a liquid-tight manner, a sealing mechanism 34 which comes into contact with the outer peripheral surface of a discharge valve pipe 32 as discharge valve means behind the large diameter hole 14L.
Is provided. The seal mechanism 34 is configured such that a step portion on the rear edge side of the large-diameter hole 14L is disposed as a seal base end, and a seal body 38 such as an omni-seal is disposed before and after the oil shaft sealing sleeve 36 at an intermediate portion. I have. As a result, the outer peripheral surface of the discharge valve pipe 32 is sealed in a liquid-tight manner, thereby preventing the discharge fluid in the chamber 14 from leaking outside. Further, in this embodiment, in order to prevent the discharge fluid from leaking out of the sealing mechanism due to the deterioration of the sealing function, the adjuster 40 capable of pressing the rear end face of the sealing mechanism 34 in the column direction is provided. The adjuster 40 penetrates the discharge valve shaft 28 to discharge the discharge head 1.
2, which is screwed to a male screw formed on the discharge head 12 and can be screwed by a rotation operation. Therefore, by screwing the adjuster 40 in the tightening direction with respect to the ejection head 12,
The spacer ring 42 interposed between the inner end face of the adjuster 40 and the seal mechanism 34 is pushed in, and the seal body 38 is pressed.
, Thereby preventing the fluid from flowing out due to a decrease in the sealing function.

Here, in order to clearly indicate the amount of seal tightening by the adjuster 40, a plurality of rotation operation holes 44 equally formed in the circumferential direction are formed on the outer peripheral surface of the adjuster 40. This is because, for example, the rotation operation hole 44 is located at an equal position of eight.
The adjuster 40 is formed by forming
The seal mechanism 34 is rotated 45 degrees by the rotation operation for the pitch so that a constant interference can always be given to the seal mechanism 34 in accordance with the screw pitch of the adjuster 40.

In order to drive and operate the above-described discharge valve and discharge valve, in this embodiment, an air cylinder mechanism 46 is attached to the rear of the discharge head 12. As described above, the discharge valve pipe 32 is provided on the outer peripheral surface of the discharge valve shaft 28.
The air piston 48 is connected to the discharge valve shaft 2 so as to be in tandem with the discharge valve pipe 32.
8 is attached to the outer peripheral surface. This air piston 48
Is in contact with the rear end face of the discharge valve pipe 32, and presses and moves the discharge valve pipe 32 in the valve closing direction by air operation.

Here, the discharge valve pipe 32 is constantly urged in the valve opening direction. For this reason, a spring seat plate 50 is fixed to the rear end of the discharge valve pipe 32. This spring seat plate 5
0 and the adjuster 40, a compression coil spring 52 is interposed, and the spring biasing force is applied to the discharge valve pipe 32.
, And at the same time, a contact force to the air piston 48 is generated. The air piston 4
8 is joined to the spring seat plate 50 in a surface contact state, and a sliding surface plate 54 is interposed between the two so that the air piston 48 rotates and slides, and the coil spring 52
Rotational torsion caused by expansion and contraction of the valve does not cause valve opening and closing resistance.

The air cylinder mechanism 46 is operable against the urging force of the compression coil spring 52 to move the discharge valve pipe 32 in the valve closing direction by the air piston 48. Therefore, the cylinder 56 in which the air piston 48 is inserted is arranged so that the air chamber 58 is on the opposite side of the compression coil spring 52 with the air piston 48 interposed therebetween. And the cylinder wall is the discharge head 12
The extension end is fixed to the ejection head 12 by bolting. An opening window 60 is formed in the cylinder wall extension on the side of the discharge head 12 so that the above-described adjuster 40 can be rotated, and when the discharge fluid leaks from the sealing mechanism 34 from the window 60. So that they can be checked visually.

In order to transmit the operation of the air cylinder mechanism 46 to the discharge valve means, an extension sleeve 62 is provided integrally with the air piston 48 so that it can slide on the discharge valve shaft 28. , And penetrates a cylinder partition wall 63 forming an air chamber 58 and projects rearward of the cylinder. The discharge valve shaft 28 has a length further protruding from the distal end edge of the extension sleeve 62, and connects the discharge valve shaft 28 and the extension sleeve 62 with a grip nut 64. Therefore, by supplying the working air to the air cylinder mechanism 46, the air piston 48 moves leftward in FIG. 1, and the discharge valve shaft 28 connected to this by the grip nut 64 moves leftward. This operation direction is the direction in which the discharge valve body 26 opens. The driving operation of the air cylinder mechanism 46 is performed simultaneously with the air piston 48.
Exhaust valve pipe 3 which is in contact with the sliding face plate 54
2 to move the tip discharge valve body portion 30 in the valve closing direction, and the stroke to the valve closing position causes the discharge valve body 26 to move.
Is determined. Therefore, the stroke can be set by the distance between the discharge valve body 26 and the discharge valve body part 30, and this can be adjusted by the grip nut 64.

The extension sleeve 62 of the air piston 48 and the discharge valve shaft 28 are connected by the grip nut 64 as described above. In this connection structure, a thread surface 62S is formed on the outer peripheral surface of the rear end of the extension sleeve 62. Engraved, the first of the grip nut 64
The nut surface 64FS is screwed and fixed with a set screw 66. This screw connection is exclusively used for fixing, and is detached only when disassembling or the like. An adjusting screw surface 28S is also engraved on the outer peripheral surface of the discharge valve shaft 28 penetrating through the extension sleeve 62, and the second nut surface 64RS of the grip nut 64 is screwed thereto. At the screwing portion between the adjustment screw surface 28S and the second nut surface 64RS, the air nut 48 is rotated by rotating the grip nut 64 relative to the discharge valve shaft 28.
Is advanced and retracted, thereby adjusting the valve closing movement start position of the discharge valve pipe 32. That is, the discharge valve pipe 32 is in contact with the air piston 48 and the grip nut 6
Since the position 4 is variable, the start position of the valve closing operation of the discharge valve pipe 32 is adjusted. Since the moving stroke of the discharge valve pipe 32 is equal to the moving stroke of the discharge valve shaft 28, the stroke of the discharge valve means can be adjusted by rotating the grip nut 64. Therefore, the grip nut 64 functions as a stroke adjustment grip, and can adjust the valve opening amount of the discharge valve body 26.
Although the stroke adjusting grip nut 64 is screwed and connected to the extension sleeve 62 of the air piston 48, it has a simple insertion structure without using screw connection.
It is also possible to adopt a type of fixing with a set screw 66.

Here, the stroke adjusting grip nut 6
A discharge valve grip 68 is attached to the outer end of the discharge valve shaft 28 to rotate the discharge valve grip 28. This is to prevent the discharge valve shaft 28 from rotating with the rotation operation of the grip nut 64. Therefore, in actual operation, the stroke adjustment grip nut 64 is rotated while the discharge valve grip 68 is manually pressed, whereby the position of the air piston 48 is adjusted.

In this embodiment, a taper surface is formed at the tip of the stroke adjusting grip nut 64, and a rotation scale 70 is provided on the taper surface. Further, a concave portion 72 having a circular cross section is formed on the grip end surface on the side where the rotary scale 70 is formed, and the small diameter portion formed on the discharge valve grip 68 is fitted into the concave portion 72. As shown in FIG. 1 (2), a ring 7 having an outer diameter substantially the same as that of the recess 72 is provided on the small diameter portion.
4 is fixed. On the outer peripheral surface of the ring 74, a so-called zero-point adjustment scale 76 for indicating the amount of screwing of the stroke adjustment grip 64 is formed. The rotary scale 7
By forming the zero rotation reference on the ring 74 or the discharge valve grip 68, the relative rotation amount can be grasped.
Therefore, with this configuration, the stroke adjustment amount can be accurately adjusted by reading the rotation scale 70 of the grip nut 64, and therefore, anyone can accurately adjust the discharge amount. In particular, since the zero point adjustment scale 76 is provided on the ring 74, it is possible to adjust the discharge devices so that they always have the same function. Becomes

In the discharge device configured as described above, resin and the like are supplied from the supply port 16 into the chamber 14. In the non-discharge state, as shown in FIG. 1, the discharge valve pipe 32 is urged rightward in the figure by the action of the compression coil spring 52, and the discharge valve seat 24 is opened. Is supplied to the outlet 1
8 will flow to the outside. The discharge valve pipe 32 urges the air piston 48 through the sliding face plate 54 by the end spring seat plate 50, and sets the discharge valve body 26 to the valve closing position by the stroke adjusting grip nut 64. When the air cylinder mechanism 46 is operated from this state, the air piston 48 operates in the figure to close the discharge valve seat 24 and at the same time via the discharge valve shaft 28 integrated with the air piston 48 and the grip nut 64. The discharge valve body 26 is opened. Thereby, the resin and the like are discharged through the discharge nozzle 20. Then, by stopping the supply of the working air, the discharge valve body 30 is opened by the action of the compression coil spring 52, and the discharge nozzle 20 is closed. The resin and the like supplied under pressure from the supply port 16 are returned from the chamber 14 to the discharge port 18.

In the present embodiment, as described above, the tip of the stroke adjusting grip nut 64 is formed with a tapered surface and the rotary scale 70 is provided. Since the ring 74 provided with a so-called zero-point adjustment scale 76 for indicating the amount of screwing of the grip 64 is provided, the rotation operation amount for adjusting the valve stroke can be accurately grasped.
In particular, since the zero point adjustment scale 76 is provided on the ring 74, the discharge devices can be adjusted so that the same discharge can be performed with the same adjustment amount even if the processing accuracy is different, and unified without depending on the processing accuracy. Discharge device function.

[0023]

As described above, according to the present invention, the discharge valve means and the discharge valve means are concentrically slidable with each other, and at least one of the valve means is slid by rotating the grip attached to one of them. A zero-point adjusting ring for indicating the sliding reference position between the discharge valve means and the discharge valve means in accordance with the rotation operation of the grip, as well as making the valve stroke variable by adjusting the position; The dispense valve means and the piston of the cylinder piston means are slidably mounted with respect to each other, and both are tandemly arranged via a sliding face plate, and the discharge valve means is urged in the valve opening direction by valve opening urging means. While the valve is movable in the valve closing direction by the operation of the piston, an axial relative position adjusting means for adjusting the opening amount of the discharge valve is provided between the piston and the discharge valve means. Since both were constructed in which a zero point adjustment ring showing the reference position of the relative axial position adjustment,
The effect is obtained that the valve stroke in the discharge device can be set accurately, and the discharge device has a structure that can always have a constant discharge control function without depending on the processing accuracy. .

[Brief description of the drawings]

FIG. 1 is a sectional view of a discharge device according to an embodiment of the present invention.

FIG. 2 is a bottom view of the same device.

FIG. 3 is a plan view of the same device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Discharge apparatus 12 Discharge head 14 Chamber 14S Small diameter hole 14L Large diameter hole 16 Supply port 18 Discharge port 20 Discharge nozzle 22 Discharge valve seat 24 Discharge valve seat 26 Discharge valve element 28 Discharge valve shaft 30 Discharge valve body part 32 Discharge valve pipe 34 Seal mechanism 36 Oil shaft sealing sleeve 38 Seal body 40 Adjuster 42 Spacer ring 44 Rotation operation hole 46 Air cylinder mechanism 48 Air piston 50 Spring seat plate 52 Compression coil spring 54 Sliding face plate 56 Cylinder 58 Air chamber 60 Open window 62 Extension sleeve 64 Stroke adjustment grip nut 66 Set screw 68 Discharge valve grip 70 Rotation scale 72 Depressed part 74 Ring 76 Zero point adjustment scale

Claims (2)

[Claims] 1. A discharge head having a chamber with a fluid supply port and a discharge port opened and a discharge nozzle opened, discharge valve means for opening and closing the discharge nozzle, and between the fluid supply port and the discharge port. A discharge valve means capable of shutting off the flow path of the above, and a cylinder piston means attached to the discharge head and driving the valve means to open and close, wherein the discharge valve means and the discharge valve means have a concentric structure. The discharge valve is made slidable relative to each other, and at least the sliding position of the valve means can be adjusted by rotating the grip attached to at least one of the valve means to make the valve stroke variable, and the discharge valve accompanying the rotating operation of the grip. A discharge device provided with a zero-point adjustment ring indicating a sliding reference position between the means and the discharge valve means. 2. A discharge head having a chamber in which a fluid supply port and a discharge port are opened and having a discharge nozzle opened, discharge valve means for opening and closing the discharge nozzle, and between the fluid supply port and the discharge port. And a cylinder piston means attached to the discharge head and driving the valve means to open and close, the discharge valve means and the cylinder being provided for the discharge valve means. The piston of the piston means is slidably mounted on the piston and both are arranged in tandem via a sliding face plate, and the discharge valve is closed by the operation of the piston while being urged in the valve opening direction by the valve opening urging means. The valve is movable in the valve direction, and an axial relative position adjusting means for adjusting a valve opening amount of the discharge valve is provided between the piston and the discharge valve means. A discharge device comprising a zero-point adjustment ring indicating a reference position.