JPS6124563B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a piston-type fluid operating device using a cup-shaped diaphragm, and is used for drawing lines or scribing work on the surface of a workpiece to be mechanically finished. For example, when a diamond cutter is used to cut plate glass flowing on a conveyor, the workpiece is made of a material that is easily damaged and has small irregularities on its surface. , a scribing needle, a diamond cutter, etc., can always be brought into contact with the surface of the target workpiece with the same pressure.

BACKGROUND TECHNOLOGY Conventionally, in piston type fluid actuating devices intended for this type of work, the piston rod connected to the sliding piston is exposed to the atmosphere, so that the piston rod is exposed to the atmosphere. The pressure receiving area of the fluid pressure and the pressure receiving area of the fluid pressure in the other direction are, in the piston on the piston rod forming side,
It differs from a piston that does not form a piston rod by the cross-sectional area of the piston rod,
As a result of the different pressure receiving areas, even if the same fluid pressurizing force is applied to one direction and the other direction of the piston at the same time,
The piston moves in the direction in which the piston rod is formed, and in order to balance the forces of movement of the piston in one direction and the other, it is necessary to apply a pressure equal to the cross-sectional area of the piston rod to the piston that forms the piston rod, and this adjustment is necessary. was extremely difficult. In addition, if the piston rod connected to the piston is exposed to the atmosphere, it must be sealed with a sealing material such as a packing or an O-ring, but this sealing material creates strong resistance to the piston rod when the piston slides. This makes it extremely difficult to slide the piston in precisely proportion to the pressurizing force of the pressurized fluid. Therefore, even if you try to always bring a scribing needle, diamond cutter, etc. into follow-up contact with the surface of the target workpiece with the same pressure, if the surface of the workpiece has unevenness, it will be difficult to contact the unevenness. Therefore, the pressure change occurring in the piston rod cannot be accurately transmitted to the pressure fluid, the piston cannot slide in proportion to the pressure change, and the target workpiece is made of a material that is easily damaged. In such cases, the target workpiece may be damaged.

Problems to be Solved by the Invention The present invention reliably eliminates the above-mentioned drawbacks and is suitable for drawing lines or scribing on the surface of workpieces to be machine-finished, or when carrying workpieces carried on a conveying device. When cutting plate glass with a diamond cutter, etc., if the workpiece is made of a material that is easily damaged and has small irregularities on its surface, it is recommended to use a scribing needle, diamond cutter, etc. The aim is to always make follow-up contact with the surface of the target workpiece with the same pressure.

Means for Solving the Problems The present invention solves the above problems by:
a piston rod that is slidably located in the cylinder in the axial direction via a bearing, has a fixed protrusion provided on the side surface and projects outside the cylinder through an elongated hole provided in the axial direction of the cylinder, and has pistons provided at both ends; A pair of cup-shaped diaphragms have a top plate fixed to the outer end of each piston, and a mounting part provided on the opening edge is fixed to the inner surface of the cylinder via a folded part. A pair of pressurizing chambers are formed between the two end walls and have an inlet and an outlet for pressurized fluid.

Function Since the present invention is configured as described above, after the fixing protrusion of the piston rod is fixed at an appropriate position of the device using the product of the present invention, a constant pressure fluid is introduced and pressurized from the inlet through the regulator. When fluid is supplied to the chamber, the piston and piston rod tend to move from the pressurized chamber supplied with strong pressure fluid to the pressurized chamber supplied with weak pressure fluid, but since the piston rod is fixed, the piston rod and The piston remains in place,
The cylinder moves the folded portion of the cup-shaped diaphragm while rolling it. Since the pressure receiving area of the two cup-shaped diaphragms is the same, this movement occurs only when there is a difference in the pressure of the pressure fluid supplied to the pair of pressurizing chambers. Even if a pressure difference occurs in the pressure fluid, the piston cannot be operated, or the piston may operate beyond the pressure difference, such as when the piston rod is protruded from the top and the pressure receiving areas of the pair of pistons are different. There is no. Therefore, if pressure fluid of the same pressure is introduced into a pair of pressurized chambers,
The pressure applied to the piston via the cup-shaped diaphragm is easily balanced. In addition, the piston rod is not connected to sealing materials such as packing or O-rings as in the past, so there is no sliding resistance, and approximately the same output as the pressure fluid applied to the pressurizing chamber is delivered to the cylinder. It becomes possible to communicate,
By supplying a constant pressure to the inlet outlet, it is possible to always supply the output corresponding to the supply pressure to the cylinder, and the cylinder can be
By connecting a scribing needle, a diamond cutter, etc., it is possible to press it against the work target area with an output corresponding to the supply pressure. The supply pressure to the scribing needle, diamond cutter, etc. connected to this cylinder does not change even if the cylinder and piston move relative to each other, so it is easy to draw lines on the surface of the workpiece to be machine finished. When performing scribing work, etc., even if the workpiece is made of a material that is easily damaged and has small irregularities on its surface, the contact pressure of the scribing needle etc. due to contact with the irregularities may change. is transmitted to the regulator as a change in fluid pressure via the piston to regulate the pressure, making it possible to always contact the scribing needle etc. with the surface of the workpiece at the same pressure.Moreover, the following contact pressure is lower than that of the pressurized fluid. The pressure can be easily set.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 is a cylinder, a cylinder body 2 has a front cover 3 at one end, a rear cover 4 at the other end,
They are connected and fixed by fixing rings 5 and 6, respectively, to form both end walls 7 and 8. 10 is the cylinder body 2
A bearing fixed to the inner surface of the piston rod 12 with a screw 11, formed by a slide bearing,
is located so that it can freely slide in the axial direction. Reference numeral 13 denotes a fixed protrusion protruding from both sides of the piston rod 12 in the axial direction, which protrudes outward through a long hole 14 bored in the axial direction of the side surface of the cylinder body 2, and is attached to an appropriate device in which the product of the present invention is installed. Fix it. 15 and 16 are fixed screws 17 and 18 at both ends of this piston rod 12.
A suitable sliding interval 19 is formed between the cylinder body 2 and the inner circumferential surfaces of the front and rear covers 3 and 4 by the piston fixed by the piston. 22 and 23 are cup-shaped diaphragms that cover both end surfaces of the pistons 15 and 16 with top plates 24 and 25, and are made of a thin film made of a composite of cloth such as polyester and rubber-like elastic material, and have a sliding interval of 19. The mounting flanges 28 and 29 at the opening edges are attached to the front and rear covers 3 and 4 through folded parts 26 and 27 having a U-shaped cross section formed by
It is inserted and fixed between the cylinder body 2 and the cylinder body 2. 3
2, 33 are these cup-shaped diaphragms 22, 23
In the pressurized chamber formed between the end walls 7 and 8 of the cylinder 1, the inlet ports 34 and 35 are connected to a fluid supply device via a Freed type regulator (not shown) that controls the flow of the pressurized fluid. At the same time, the cup-shaped diaphragms 22 and 23 have the same pressure receiving area for the pressurized fluid. Reference numeral 36 denotes a working protrusion fixedly protruding from the front cover 3 of the cylinder 1, and is formed into an appropriate shape so as to be convenient for mounting a member corresponding to the purpose of the device in which the product of the present invention is installed.

In the configuration as described above, from the fluid supply device via a bleed type regulator, etc.
If a constant pressure fluid is supplied to the pressurizing chambers 32 and 33 from the inlet ports 34 and 35, as shown in FIGS. The pistons 15, 16 and the piston rod 12 try to move toward the pressurized chamber 33, which is supplied with
Since the fixing protrusion 13 is fixed at an appropriate position of the device using the present invention, the piston rod 12 and the pistons 15, 16 are held in place while the cylinder 1 is moved into a cup shape together with the working protrusion 36. Folded portions 26, 2 of diaphragms 22, 23
Move while rolling 7. Since the pressure receiving areas of the cup-shaped diaphragms 22 and 23 are the same, this movement occurs only when there is a difference in the pressure of the pressure fluid supplied to the pressurizing chambers 32 and 33. For example, when a piston rod is protruded from the pressure receiving side and the pressure receiving areas of a pair of pistons are different, even if a pressure difference occurs in the pressure fluid, the piston may or may not operate, or may operate beyond the pressure difference. There's nothing wrong. Therefore, through a bleed type regulator,
If pressure fluids of the same pressure are introduced into the pressurizing chambers 32, 33, the pressures applied to the pistons 15, 16 via the cup-shaped diaphragms 22, 23 are easily balanced. Furthermore, since no sealing material such as packing or O-ring is connected to the piston rod 12 as in the past, there is no sliding resistance and the pressure chamber 3
It becomes possible to transmit almost the same output to the cylinder 1 as the pressure fluid applied to the inlet ports 34 and 33, and if a constant pressure is supplied to the inlet ports 34 and 35 via a bleed type regulator etc. It becomes possible to always supply an output corresponding to the pressure to the working protrusion 36. The supply pressure to the working protrusion 36 does not change even if the cylinder 1 and the pistons 15, 16 move relative to each other.

Effects of the Invention Since the present invention is configured as described above, it can be used when drawing lines on the surface of a workpiece to be mechanically finished, when cutting a plate glass with a diamond cutter, etc. Even when the workpiece is made of a material that is easily damaged and has small irregularities on the surface, it is possible to always contact the scribing needle etc. with the same pressure to the workpiece surface, and it is also possible to The contact pressure can be easily set by the pressure of the pressurized fluid. Therefore, in addition to the above-mentioned scribing device and work such as cutting plate glass, it can also be used as a "tracing" device, etc., which moves the blade following the template or model and reproduces the shape of the template or model on the workpiece. . In addition, the present invention makes it possible to produce an extremely wide range of applications depending on the device connected to the cylinder.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view, and FIG. 2 is a sectional view showing a state in which the cylinder has been moved from FIG. 1, with the piston portion not being shown in cross section. FIG. 3 is a sectional view taken along the line AA in FIG. 1. 1...Cylinder, 7...Both end walls, 10...Bearing, 1
2... Piston rod, 13... Fixed protrusion, 15, 1
6... Piston, 22, 23... Cup-shaped diaphragm, 24, 25... Top plate, 26, 27... Folded part,
32, 33...pressure chamber, 34, 35...introduction outlet.

Claims (1)

[Claims] 1. A piston rod which is located in a cylinder so as to be slidable in the axial direction via a bearing, and has a fixed protrusion provided on the side surface that protrudes outside the cylinder through an elongated hole provided in the axial direction of the cylinder, and is provided with pistons at both ends. , a pair of cup-shaped diaphragms with a top plate fixed to the outer end of each piston and a mounting part provided on the opening edge fixed to the inner surface of the cylinder via a folded part, and a pair of cup-shaped diaphragms with a top plate fixed to the outer end of each piston, and 1. A piston-type fluid operating device comprising a pair of pressurizing chambers formed between two end walls provided with an inlet and an outlet for pressurized fluid.