JP2002081404A - Pneumatic-hydraulic speed adjusting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pneumatic-hydraulic speed adjusting mechanism capable of controlling moving speed of an object such as a finger of a mechanical turnup molding machine with high accuracy and without being affected by disturbance. SOLUTION: This mechanism is provided with an oil amount adjusting mechanism 9 for supplying air to a left chamber 8a of a cylinder 8 for moving the finger 7, filling oil in a right chamber 8b and controlling moving speed of the finger 7 by controlling outflow amount to a chamber 11 of the oil. The oil amount adjusting mechanism 9 is provided with a cylinder 13 constituted by sectioning the chamber 11 by a piston 12, a ball screw 15 which is supported so as to be movable on a shaft by a nut part 14 of the cylinder 13 and is attachable/detachable to/from a back face of the piston 12, a servo motor 16 as a regulating means for regulating moving amount of the ball screw 15, a contact sensor 17 installed at a tip of the ball screw 15 and a controller 18 for controlling the servo motor 16 based on a signal from the contact sensor 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic speed adjusting mechanism suitable for use in a mechanism for moving an object against an external force using an air cylinder.

[0002]

2. Description of the Related Art As a mechanism for moving an object against an external force using an air cylinder, for example, a mechanical turn-up molding machine as shown in FIG. 4 is well known.

According to this, the tire member 100 is connected to a finger.
When turning up using 101, the cylinder 102 is driven by air to perform turn-up. In other words, by supplying air to the driving side of the cylinder 102, the cylinder 102 moves on the drum 103 of the tire forming machine in the direction of the arrow while exhausting air from the non-driving side of the cylinder 102.

[0004]

By the way, in such a conventional mechanical turn-up molding machine, when the tip of the finger 101 is caught on the projection a of the tire member 100, the air is applied to the driving side of the cylinder 102. Is supplied, but the moving speed of the finger 101 (cylinder 102) is extremely reduced (see arrow B in the figure). As soon as the finger 101 gets over the protrusion A, the moving speed of the finger 101 becomes remarkable due to the compressed air pressure. (See arrow C in the figure).

[0005] Such a behavior is very difficult to control as long as compressive air is used. In terms of tire quality, the quality of the tire member 100 is increased due to local stretching. Causes deterioration.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an air-liquid type capable of controlling the moving speed of an object such as a finger of a mechanical turn-up molding machine with high accuracy without being affected by disturbance. It is an object to provide a speed adjusting mechanism.

[0007]

A pneumatic-type speed adjusting mechanism according to the present invention for achieving the above object supplies air to a driving side of a cylinder for moving an object and supplies liquid to a counter-driving side. And a liquid amount adjusting mechanism for controlling a moving speed of the object by controlling an outflow amount of the liquid.

The liquid amount adjusting mechanism includes a cylinder defining a chamber into which the liquid flows through a passage defined by a piston, and is supported by the cylinder so as to be axially movable, and is capable of coming into and out of contact with the back surface of the piston. It is characterized by comprising a shaft and a regulating means for regulating the movement amount of the shaft.

The regulating means includes a driving means for moving the shaft, a means for detecting the distance between the piston and the shaft such as a contact sensor provided between the piston and the facing surface of the shaft, and the detecting means. And control means for controlling the driving means based on a signal from the control means.

Further, the object is a finger of a mechanical turn-up molding machine.

[0011] The object is a push can for pressing a bladder of a tire molding machine.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an air-liquid type speed adjusting mechanism according to the present invention will be described in detail with reference to the drawings with reference to embodiments.

[First Embodiment] FIG. 1 is a schematic diagram showing a main part of a mechanical turn-up molding machine having a pneumatic-type speed adjusting mechanism according to a first embodiment of the present invention, and FIG. It is.

As shown in FIG. 1, a drum (frame) 2 slidable on a hollow main shaft 1 has an air piston 3
Thus, one side of the tire member 5 is carried via the segment 4 which can be moved up and down (enlarged / reduced), and the folded-back piece 5 a is turned up by a finger 7 as an object via a bead wire 6.

The finger 7 is driven by a cylinder 8 driven by air, and its moving speed is controlled by a liquid amount adjusting mechanism 9. As shown in FIG. 2, a large number of the fingers 7 are radially arranged on an annular cylinder 8 fitted around the main shaft 1.

That is, when air is supplied from a pressurized air supply source (not shown) to the driving side of the cylinder 8 (the left chamber 8a defined by the piston 10), the cylinder 8 moves leftward on the drum 2. Then, the folded piece 5a is gradually turned up by the forward movement of the finger 7 accompanying this.

On the other hand, the opposite side of the cylinder 8 (the right chamber 8b defined by the piston 10) is filled with liquid.
The moving speed of the finger 7 is controlled by controlling the outflow amount of the liquid by the liquid amount adjusting mechanism 9.

The liquid amount adjusting mechanism 9 controls the passage of the liquid in the passage 1.
A cylinder 13 defined by a piston 12, and a ball screw (shaft) 15 supported by a nut portion 14 of the cylinder 13 so as to be axially movable and capable of coming in contact with and separating from the back surface of the piston 12. And the ball screw 15
Regulating means for regulating the amount of movement of the object.

The regulating means includes a servo motor 16 for moving the ball screw 15, a contact sensor 17 attached to the tip of the ball screw 15, and the servo motor 16 based on a signal from the contact sensor 17. And a controller 18 for controlling.

With this configuration, the tire member 5
When the finger 7 is moved forward by supplying air to the left chamber 8a of the cylinder 8 to turn up the folded piece 5a of the cylinder 8, the chamber of the cylinder 13 of the oil amount adjusting mechanism 9 is moved from the right chamber 8b of the cylinder 8. The liquid flows out to 11, and the piston 12 and the ball screw 15 move rightward in the drawing, whereby the finger 7 can move forward.

At this time, the movement amount of the liquid is controlled by regulating the movement amount of the ball screw 15 by the servomotor 16, and as a result, the movement speed of the finger 7 (cylinder 8) is controlled. Become.

When the tip of the finger 7 is caught on the projection of the tire member 5, the left chamber 8
Although the air is supplied to a, the moving speed of the finger 7 is extremely reduced, but the tip of the ball screw 15 which continues to move at a constant speed is moved to the piston 12 whose moving speed is reduced in the liquid amount adjusting mechanism 9. Away from the back of the

This is detected (ON) by the contact sensor 17.
Then, the controller 18 to which the detection signal is input outputs a stop signal to the servo motor 16 to immediately stop the movement of the ball screw 15.

Thereafter, when the tip of the finger 7 climbs over the projection, the finger 10 is conventionally compressed by air pressure.
1 (see FIG. 4), the moving speed is remarkably increased. In this embodiment, in the liquid amount adjusting mechanism 9, the back surface of the piston 12 instantaneously hits the tip of the ball screw 15, and the contact sensor 17 is turned off. By doing so, the ball screw 15 is again moved at a predetermined speed by the servo motor 16, so that the moving speed of the finger 7 is also controlled to the predetermined speed as before, and runaway is avoided.

As described above, in this embodiment, the amount of movement of the finger 7 when climbing over the protrusion is suppressed, and the turn-up can be performed without locally stretching the tire member 5, so that the deterioration of the quality of the tire is reduced. Can be prevented.

[Second Embodiment] FIG. 3 is a schematic structural view of a push-can mechanism for pressing a bladder of a tire forming machine having an air-liquid type speed adjusting mechanism according to a second embodiment of the present invention.

This is an application of the liquid amount adjusting mechanism 9 in the previous embodiment to a push can mechanism for pressing a bladder of a tire forming machine. That is, when the folded piece 5a of the tire member 5 is pressed by the push can 21 via the ladder 20, the oil amount adjusting mechanism 9 is assembled to the cylinder 22 that drives the push can 21. Since other configurations are the same as those of the previous embodiment, the same members as those in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

According to this embodiment, the moving speed of the push can 21 can be controlled to a predetermined speed irrespective of a change in the air pressure of the cylinder 22, and there is a problem that air is mixed into the folded portion of the tire member 5. By avoiding this, it is possible to prevent deterioration in tire quality.

The present invention is not limited to the above embodiments,
It goes without saying that various changes can be made without departing from the spirit of the present invention. For example, a liquid other than oil may be used as the liquid amount adjusting mechanism, or a shaft and a driving unit other than a ball screw and a servomotor may be used. Further, a means other than the contact sensor may be used as a means for detecting the distance between the piston and the shaft.

[0030]

As described above in detail with reference to the embodiments, the invention according to claim 1 of the present invention supplies air to the drive side of a cylinder for moving an object and supplies air to the counter drive side. A liquid amount adjusting mechanism that controls the moving speed of the object by filling the liquid and controlling the amount of the liquid flowing out is provided, so that the moving speed of the object is affected by disturbance. It is possible to control with high accuracy without using.

According to a second aspect of the present invention, in the liquid amount adjusting mechanism, a cylinder having a piston defining a chamber into which the liquid flows through a passage is supported by the cylinder so as to be axially movable. A shaft is provided on the back surface of the piston and is capable of moving freely, and a regulating means for regulating the amount of movement of the shaft is provided, so that the structure is simple and the layout is easy.

In the invention according to a third aspect of the present invention, the regulating means includes a driving means for moving the shaft, and a distance between the piston and the shaft such as a contact sensor provided between the piston and the facing surface of the shaft. , And control means for controlling the driving means based on a signal from the detecting means, so that the moving speed can be automatically controlled with high accuracy.

The invention according to claim 4 of the present invention is characterized in that the object is a finger of a mechanical turn-up molding machine, so that the turn-up can be performed without locally stretching the tire member, Quality degradation can be prevented.

The invention according to claim 5 of the present invention is characterized in that the object is a push can for pressing a bladder of a tire molding machine, so that air is mixed into the folded portion of the tire member. It is possible to avoid inconvenience and prevent tire quality deterioration.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a main part of a mechanical turn-up molding machine with a pneumatic-type speed adjusting mechanism showing a first embodiment of the present invention.

FIG. 2 is a view showing an arrangement of fingers.

FIG. 3 is a schematic configuration diagram of a push-can mechanism for pressing a bladder of a tire forming machine having an air-liquid type speed adjusting mechanism according to a second embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a main part of a conventional mechanical turn-up molding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main shaft 2 Drum (frame) 2 3 Air piston 4 Segment 5 Tire member 5a Folding piece 6 Beat wire 7 Finger 8 Cylinder 8a Left chamber 8b Right chamber 9 Fluid volume adjustment mechanism 10 Piston 11 chamber 12 Piston 13 Cylinder 14 Nut 15 Ball screw 16 Servo motor 17 Contact sensor 18 Controller 20 Bladder 21 Push can 22 Cylinder

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H081 AA01 AA03 BB03 FF02 FF14 GG04 GG10 GG21 HH04 3H089 AA21 CC06 FF03 GG03 JJ20 4F212 AA45 AH20 AR08 VA02 VK18 VK19 VR03

Claims (5)

[Claims] 1. A moving speed of an object is controlled by supplying air to a driving side of a cylinder for moving the object, filling a liquid on an opposite side, and controlling an outflow amount of the liquid to the outside. An air-liquid type speed adjusting mechanism, characterized by comprising a liquid amount adjusting mechanism. 2. The liquid amount adjusting mechanism according to claim 1, further comprising: a cylinder having a piston defining a chamber into which the liquid flows through a passage; 2. The air-liquid type speed adjusting mechanism according to claim 1, further comprising a shaft, and a restricting means for restricting an amount of movement of the shaft. 3. The control means includes: drive means for moving the shaft; means for detecting a distance between the piston and the shaft, such as a contact sensor provided between opposing surfaces of the piston and the shaft; and the detection means. 3. The air-liquid type speed adjusting mechanism according to claim 2, further comprising control means for controlling the driving means based on a signal from the controller. 4. An apparatus according to claim 1, wherein said object is a finger of a mechanical turn-up molding machine.
Or the air-liquid type speed adjusting mechanism according to 3. 5. The object according to claim 1, wherein the object is a push can for pressing a bladder of a tire molding machine.
4. The air-liquid type speed adjusting mechanism according to 2 or 3.