JPH0357325B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cutting device using a piston-type fluid-operated mechanism, in which a cutter is connected to the piston-type fluid-operated mechanism to cut glass plates, vinyl sheets, etc. It is an object of the present invention to provide a device that can press and cut a plate-like object or a sheet-like object with a constant pressing force regardless of the presence of irregularities on the surface thereof.

BACKGROUND OF THE INVENTION In the past, there have been various types of piston-type fluid actuated devices.

One method is to connect the bottom plate of a cup-shaped diaphragm to both ends of a piston inserted into a cylinder. In this type of piston-type fluid operating device, when the cutter connected to the device is brought into contact with the work object, it is possible to do so gradually while controlling the rod speed, without suddenly moving the cutter to make contact. Furthermore, even if the object to be worked on is easily damaged, safe work can be performed. Furthermore, if a foreign object or the like enters the working section, the cutter can be quickly restored and evacuated, and the cutter has the advantage of being able to perform reciprocating motion at any speed.

However, in order to perform this reciprocating motion,
Since cup-shaped diaphragms are provided on both sides of the piston, the membrane rigidity is equivalent to that of two membranes. Also, due to its structure, packing, surface contact bearings, holding parts, etc. must be connected to the piston rod.
These resistances become larger. This results in the disadvantage that the piston cannot sufficiently follow the force applied from the direction opposite to the sliding pressure.

For example, if the plate surface to be cut or cut with a cutter has unevenness, if the above resistance is large,
The cutter cannot reach the bottom of the recess and ends up flying from one convex part to another. Therefore, it is not possible to cut or cut the recessed part, and the glass plate,
To make the cutting of plate-like objects such as vinyl sheets and sheet-like objects insufficient.

Further, a cup-shaped diaphragm formed only on one end surface of the piston does not have the above-mentioned drawbacks, and has the advantage that it can sufficiently follow the force applied to the piston from the direction opposite to the sliding pressure. However, it has the disadvantage that reciprocating motion cannot be performed and the stroke of the piston is short.

In addition, in a piston-type fluid actuator using a cup-shaped diaphragm, the distance C between the outer circumference of the piston and the inner circumference of the cylinder is C=D-d/2, where D is the inner diameter of the cylinder and d is the outer diameter of the piston. It is sought after.

Further, the relationship between the distance C and the sliding resistance is as shown in FIG.

Therefore, as shown in Figure 3, when the distance C is increased, the sliding resistance becomes smaller, and as the sliding resistance becomes smaller, the sliding pressure becomes smaller, and when it comes to following the reaction force, there is no radical force. Although the extent to which it is applied to the tip of the cutter is reduced, the followability is improved.

Therefore, in general, the smaller the distance between the inner peripheral surface of the cylinder and the outer peripheral surface of the piston, the stronger the sliding pressure can be generated. It has the disadvantage of not being able to follow suit. On the other hand, if the distance between the inner circumferential surface of the cylinder and the outer circumferential surface of the piston is made large, the force applied to the piston from the direction opposite to the sliding pressure can be sufficiently followed; This results in the disadvantage that sliding pressure cannot be obtained.

Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems, and is capable of sensitively following the force applied to the piston from the direction opposite to the sliding pressure. To obtain a long sliding stroke and strong sliding pressure of a piston rod. Therefore, it is possible to obtain an apparatus that can press and cut plate-like objects such as glass plates, vinyl sheets, etc., and sheet-like objects with a constant pressing force regardless of the presence of irregularities on the surface thereof.

Means for Solving the Problems The present invention solves the above problems by:
A bottom plate of a cup-shaped diaphragm is connected to both ends of the piston, and a cross section U capable of rolling movement is formed between the bottom plate and the opening at the other end of the cup-shaped diaphragm.
A first actuating body is formed by forming a letter-shaped folded portion and fixing the opening edge at the other end to a cylinder, and forming one pressurizing chamber and the other pressurizing chamber at both ends of the cylinder. A second cylinder is connected to the piston rod protruding outside the cylinder of the first actuating body, and the bottom plate of the second cup-shaped diaphragm is fixed to the first actuating body side of the second piston inserted into the second cylinder. Between the opening edge of the other end of the two-cup diaphragm and the bottom plate,
A folded part with a U-shaped cross section that can be moved by rolling is formed, and the opening edge of the other end of the second cup-shaped diaphragm is fixed to a second cylinder, and a pressurizing chamber is provided on the first actuating body side of the second cylinder. At the same time, the second piston rod side of the second cylinder is opened to the atmosphere to form a second actuating body, and the distance between the inner circumferential surface of the second cylinder of this second actuating body and the outer circumferential surface of the second piston is set as described above. The first actuating body is formed to be larger than the distance between the inner circumferential surface of the cylinder and the outer circumferential surface of the piston, and the effective pressure receiving area of the second piston of the second actuating body is smaller than the effective pressure receiving area of the piston of the first actuating body. , a cutter is connected to a second piston rod connected to the second piston.

Effect Since the present invention is configured as described above, when pressurized air is introduced into the other pressurizing chamber of the first operating body, the piston is pressed by the pressurized air and moves toward the one pressurizing chamber. The second operating body is pressed and moved together with the piston rod.

Along with this movement, the cup-shaped diaphragm also moves while rolling along the folded portion, and the cutter connected to the piston rod of the second operating body is brought close to or pressed into contact with the target part of the object to be cut.

Furthermore, if the same pressurized air as that introduced into the first actuating body is introduced into the pressurizing chamber of the second actuating body at the same time,
Press the piston rod toward the cutter.

This pressing operation will be performed under the following conditions. That is, the distance between the inner circumferential surface of the cylinder and the outer circumferential surface of the piston is set to be smaller than that of the first actuating body.
The actuating body is formed to be large, and the effective pressure receiving area of the piston of the first actuating body is made larger than the effective pressure receiving area of the piston of the second actuating body. Here, the effective pressure receiving area A of the piston can be calculated from the average value of the cylinder inner diameter D and the piston outer diameter d using the following equation.

Effective pressure receiving area = π/4 (DC) ² C is the distance between the outer circumference of the piston and the inner circumference of the cylinder.

Therefore, when pressurized air of the same pressure is applied, the one with a larger effective pressure receiving area can obtain a larger pressurizing force.

Therefore, a long sliding stroke of the piston rod and strong sliding pressure can be obtained with the first actuating body. In the second actuating body, the distance C between the second piston and the second cylinder can be increased to reduce the sliding resistance of the second piston. Therefore, the second actuating body with less sliding resistance of the second piston can sufficiently follow the force applied to the piston rod from the direction opposite to the sliding pressure, and can also follow the minute force. Become.

Furthermore, the second piston of the second actuating body
Since the second piston rod side of the cylinder is open to the atmosphere, there is no need to provide packing, surface contact bearings, etc. on the second piston rod, and sliding resistance can be further reduced.

Therefore, even if the surface of the plate to be cut or cut with the cutter has irregularities, the cutter can follow the bottom of the recess because the resistance is small, and the cutter will not jump from one convex part to the other. Never. Therefore, it is possible to reliably cut plate-like objects such as glass plates, vinyl sheets, and sheet-like objects having uneven surfaces.

Further, the pressurized air supplied to the first actuating body and the second actuating body do not necessarily have to have the same pressure, but as shown in the above embodiment, if the pressurized air is made to have the same pressure, the supply source can be made the same, pressure control can be easily performed, and the apparatus can be simplified.

Therefore, the first working body obtains a long sliding stroke and strong sliding pressure of the piston rod, and the second working body
The actuating body sensitively follows the force applied to the second piston from the direction opposite to the sliding pressure, and can also follow minute forces. By forming it in this way, when cutting plate-like objects such as glass plates and vinyl sheets, sufficient pressure necessary for cutting is always maintained by the first actuating body, and the plate-like object is cut. A second actuating body follows minute irregularities on the surface of an object or a sheet-like object, and causes a change in the pressing force of the cutter against the object to be cut, both at these recesses and projections. are extremely rare.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a cylinder constituting the first operating body 2, and a front cover 4 is fixed to one end of the main body 3 with a fixing ring 5. are doing. Further, a rear cover 6 is fixed to the other end of the cylinder 1 with a fixing ring 7,
A piston 8 is inserted into the cylinder 1 at an appropriate sliding interval.

Bottom plates 12 and 13 of cup-shaped diaphragms 10 and 11 are connected and fixed to both ends of this piston 8 with retainer plates 14 and 15. In addition, the bottom plates 12 and 13 of the cup-shaped diaphragms 10 and 11
and mounting flanges 20 and 21 provided at the opening at the other end.
The folded portions 16 and 17, which are capable of rolling movement and have a U-shaped cross section, are formed between them. In addition, by inserting and fixing the mounting flanges 20 and 21 between the end faces of the main body 3 of the cylinder 1, the front cover 4, and the rear cover 6, one pressure chamber 2 is attached to both ends of the cylinder 1.
2, and the other pressurizing chamber 23 is formed.

The one pressurizing chamber 22 and the other pressurizing chamber 23
A pressurized air introduction outlet 24, 25 is opened in each of the two. Further, the folded portions 16 and 17 of the cup-shaped diaphragms 10 and 11 have a U-shaped cross section, and the piston 8
An opposing chamber 26 is formed between the outer surface and the inner surface of the cylinder 1.

This opposing chamber 26 is one pressurized chamber 2 and the other pressurized chamber 2
It moves together with the piston 8, which moves due to the pressure difference between 0 and 23, and moves along with the rolling movement of the folded parts 16 and 17. Exhaust holes 27 and 28 are opened in the cylinder 1 at positions corresponding to both ends of the stroke of the opposing chamber 26, and the pressure inside the opposing chamber 26 is maintained at the same pressure as the outside air without increasing the pressure. With this configuration, the folded portion 16,
17 is prevented from being rolled into the pressurizing chambers 22 and 23.

Further, one end of the piston rod 32 is inserted into the center of the piston 8 through the opening 31. Then, the piston rod 32 is fixed to the piston 8 with a fixing nut 33, and the other end of the piston rod 32 is fixed to the central holding portion 3 of the cover 4.
4 through the bearing 35 and packing 36 so as to be slidable. The piston rod 32 is protruded out of the cylinder 1 through this packing 36, and the threaded portion 3 of the protruded piston rod 32 is
7, the second cylinder 42 of the second operating body 41 is connected.

In the second cylinder 42, a front body 43 and a rear body 44 are connected and fixed by a fixing ring 45, and a second piston 46 is slidably inserted into the second cylinder 42. At one end of this second piston 46, a second
The bottom plate 48 of the cup-shaped diaphragm 47 is connected. This second cup-shaped diaphragm 47
A folded portion 49 having a U-shaped cross section and capable of rolling movement is formed between the opening edge at the other end and the bottom plate 48.

Further, the opening edge of the second cup-shaped diaphragm 47 is inserted and fixed between the end surfaces of the front body 43 and the rear body 44 to form a pressurizing chamber 51 at one end of the second cylinder 42 . Then, an introduction outlet 52 for pressurized air is opened in this pressurizing chamber 51, and the same pressure as the pressurized air supplied to the introduction outlets 24 and 25 of the first actuating body 2 is applied to the introduction outlet 52. It is possible to introduce compressed air.

In addition, the inner peripheral surface of the cylinder 42 and the piston 46
The distance 53 between the outer circumferential surfaces of the cylinder 1 and the outer circumferential surface of the piston 8 of the first actuating body 2 is
Form larger than. At the same time, the effective pressure receiving area of the piston 8 of the first actuator 2 is larger than that of the second actuator 4.
The effective pressure receiving area of the first piston 46 is made small.

Further, one end of the second piston rod 54 is screwed and fixed to the center portion of the other end of the second piston 46 of the second actuating body 41. Further, the second piston rod 54 side of the second piston is open to the atmosphere, and the second piston rod 54 is formed without packing, surface contact bearings, or the like. Further, the other end direction of the second piston rod 54 is connected to the front body 4 of the cylinder 42.
3. Projects freely to the outside. This second operating body 41
A cutter 55 is connected to the piston rod 54 protruding outside the cylinder 42.

In addition, the piston rod 54 of the second actuating body 41 has an L-shaped base 56 fixed to the front cover 4 of the first actuating body 2 in order to improve the stability of forward and backward movements.
Slide bearings 57 are formed at appropriate intervals, and the piston rod 54 is held by the slide bearings 57.

In the configuration as described above, the first actuating body 2
Pressurized air is introduced into the other pressurizing chamber 23 from the other inlet outlet 25 of the pressurized air chamber 23 . Then, the piston 8 is pressed by the pressurized air and moves to the right in FIG. 1, pressing the second actuating body 41 together with the piston rod 32.

Along with this movement, the cup-shaped diaphragm 1
0 and 11 also move while rolling on the folded parts 16 and 17. Then, the cutter 55 connected to the piston rod 54 of the second operating body 41 is brought close to or pressed into contact with a target portion such as an object to be cut.

Furthermore, if the same pressurized air as that introduced into the first actuator is introduced from the introduction outlet 52 of the second actuator 41 at the same time, the piston rod 54 is pushed in the right direction in the drawing.

This pressing operation will be performed under the following conditions. That is, the distance 53 between the inner circumferential surface of the cylinder and the outer circumferential surface of the piston 46 is
The distance between the inner circumferential surface of the cylinder 1 and the outer circumferential surface of the piston 8 is larger than the distance 38, and the effective pressure receiving area of the piston 46 of the second actuating body 41 is larger than the effective pressure receiving area of the piston 8 of the first actuating body 2. It is formed small.

In addition, in a piston-type fluid actuator using a cup-shaped diaphragm as a piston, the relationship between the distance C between the outer peripheral surface of the piston and the inner peripheral surface of the cylinder and the sliding resistance of the piston is as shown in FIG. 1st
The distance C shown by reference numerals 38 and 53 in the figure is such that the larger the distance C is, the less the sliding resistance becomes.

In addition, in a piston-type fluid actuator using a cup-shaped diaphragm, the distance C between the outer circumference of the piston and the inner circumference of the cylinder is given by C=D-d/2, where D is the inner diameter of the cylinder and d is the outer diameter of the piston. It is required.

Therefore, when the distance C is increased, the sliding resistance becomes smaller as shown in Figure 3, and when the sliding resistance becomes smaller, the sliding pressure becomes smaller, and it is difficult to apply an extreme force to follow the reaction force. cutter 55
Although the extent to which it is applied to the tip is smaller, the followability is better. Furthermore, the second piston rod 54 includes:
Since there is no packing, bearings that make surface contact, etc., the sliding resistance can be made extremely small, and the ability to follow irregularities can be made even better.

Therefore, the first actuating body 2 has a large effective pressure receiving area.
This allows a long sliding stroke and strong sliding pressure of the piston rod 32 to be obtained. Further, the second actuating body 41 can sufficiently follow the force applied to the piston rod 54 from the direction opposite to the sliding pressure, and can also follow the minute force.
Therefore, when cutting a plate-shaped object such as glass having an uneven surface, even if the moving speed of the cutter 55 is fast, the cutter 55 can follow the cutter 55 into the recessed part and perform reliable cutting.

Further, the pressurized air supplied to the first actuating body 2 and the second actuating body 41 does not necessarily have to have the same pressure, but as shown in the above embodiment, if the pressurized air is made to have the same pressure, , the supply source can be the same, pressure control can be easily performed, and the apparatus can be simplified.

Effects of the Invention Since the present invention is configured as described above,
The cutter connected to the second actuator applies sufficient pressure necessary for cutting plate-like objects such as glass plates and vinyl sheets to the first actuator, which has a large effective pressure-receiving area. can be held at all times.

At the same time, minute irregularities on the surface of the plate-like object or sheet-like object are followed by the second actuating body with low sliding resistance, and the cutter is moved against the object to be cut in both concave and convex parts. There is very little change in the pressing force. Therefore, the cutter can apply approximately the same pressing force to a plate-shaped object regardless of surface irregularities, and even if the object to be cut is soft and easily damaged, it will not cause damage. There are things that allow cutting.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line A-A in FIG. Explanatory diagram showing the relationship between and interval C, 4th
The figure is a schematic diagram of a cup-shaped diaphragm. 1... Cylinder, 2... First operating body, 8...
Piston, 10, 11... Cup-shaped diaphragm, 12, 13, 48... Bottom plate, 16, 17, 4
9... Turning part, 22, 23, 51... Pressurizing chamber,
32... Piston rod, 38, 53... Spacing,
41... second operating body, 42... second cylinder,
46...Second piston, 47...Second cup-shaped diaphragm, 51...Cutter, 54...Second piston rod.

Claims (1)

[Claims] 1 A bottom plate of a cup-shaped diaphragm is connected to both ends of the piston, and a folded part with a U-shaped cross section that is capable of rolling movement is formed between the bottom plate and the opening at the other end of the cup-shaped diaphragm. A first actuating body is formed by fixing the edge to a cylinder and forming a pressurizing chamber at one end and a pressurizing chamber at the other end of the cylinder, and a piston rod protruding outside the cylinder of the first actuating body. 2 cylinders are connected, and the bottom plate of the second cup-shaped diaphragm is fixed to the first actuating body side of the second piston inserted into the second cylinder, and the opening edge of the other end of the second cup-shaped diaphragm and the bottom plate are fixed. In between, a folded part having a U-shaped cross section that is capable of rolling movement is formed, and the opening edge of the other end of the second cup-shaped diaphragm is fixed to a second cylinder, and the first actuating body side of this second cylinder is fixed to the second cylinder. A pressurized chamber is formed in the second cylinder, and the second piston rod side of the second cylinder is opened to the atmosphere to form a second actuating body, and the inner circumferential surface of the second cylinder of the second actuating body and the outer circumferential surface of the second piston are connected to each other. The distance is larger than the distance between the inner circumferential surface of the cylinder of the first actuating body and the outer circumferential surface of the piston, and the effective pressure receiving area of the second piston of the second actuating body is larger than the effective pressure receiving area of the piston of the first actuating body. A cutting device characterized in that the area is reduced and a cutter is connected to a second piston rod connected to the second piston.