JP2001349305A - Rectilinear reciprocating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent foreign matters from entering a rod-less cylinder. SOLUTION: A cylinder tube 15 is provided on the back side of a base 10, and slit of the cylinder tube 15 is directed toward the back side. A piston freely reciprocating in the cylinder tube 15 is connected to a piston mount 23 through a piston yoke incorporated between an inner seal band and an outer seal band sealing the inside and outside of the slit, and the piston mount 23 is fitted with a reciprocating member 27 projected from the back side of the base 10 through the side surface side to the surface side. The reciprocating member 27 is driven by the piston under the condition where the base 10 covers the slit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear reciprocating apparatus in which a reciprocating member is linearly reciprocated by using a slit type rodless cylinder.

[0002]

2. Description of the Related Art In a normal cylinder, a driven member is driven by a piston rod projecting from a cylinder tube. ,
A rodless cylinder in which the movement of the piston is transmitted to the driven member without using a piston rod has the advantage that the overall length of the cylinder can be shortened.

A rodless cylinder has a magnet type in which the movement of a piston is transmitted to a piston mount provided outside a cylinder tube via a magnetic force, and a piston and a piston provided through a slit provided in the cylinder tube. There is a slit type that connects to a mount.

[0004]

In a slit type rodless cylinder, an inner seal band disposed inside a cylinder tube to seal the slit, and an outer seal band disposed outside the cylinder to seal the slit are provided. The driven member is mounted on a piston mount provided reciprocally along the cylinder tube so as to face the slit.

[0005] Therefore, the driven member moves to the position facing the slit along the cylinder tube, and is generated when the driven member is moved, and foreign substances such as dust and dust existing around the driven member are removed. It enters between the seal band and the cylinder tube, and reduces the sealability of the seal band. As a result, the compressed air supplied into the cylinder tube leaks outside.

[0006] If there is a possibility that foreign matter may enter between the seal band and the cylinder tube, not only frequent maintenance is required but also the durability of the cylinder is impaired. Is attached so as to cover the entire front side of the apparatus, and the reciprocating member connected to the piston mount protrudes toward the front side of the front cover through a gap between the front cover and the cylinder tube.

Therefore, conventionally, it is necessary to provide a large surface cover so as to cover the entire surface of the cylinder tube in order to prevent foreign matter from entering the slit.

An object of the present invention is to prevent foreign matter from entering a rodless cylinder without using a surface cover that covers the entire cylinder tube.

[0009]

A linear reciprocating apparatus according to the present invention is provided along a longitudinal direction on a back side of a base and has a slit formed on the back side, and is disposed in the cylinder tube. A piston that reciprocates in the axial direction by fluid pressure supplied to the pressurizing chamber, an inner seal band and an outer seal that are reciprocally disposed on the back side of the cylinder tube and seal the inside and outside of the slit. A piston mount connected to the piston via a piston yoke incorporated between the bands, a reciprocating member fixed to the piston mount and extending from the back side of the base to the front side via the side surface; Wherein the reciprocating member is driven by the piston in a state where the base covers the slit.

The linear reciprocating device according to the present invention is characterized in that a side cover for covering a side surface of the piston mount is provided on a side surface of the base. Further, the linear reciprocating device of the present invention is characterized in that a concave portion is formed on the back surface of the base, and the cylinder tube is attached to the concave portion.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a linear reciprocating device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a front view of FIG. 5 is a bottom view of FIG. 1, FIG. 5 is a right side view of FIG. 1, FIG. 6 is a cross-sectional view taken along line AA in FIG. 2, and FIG.
FIG. 8 is a cross-sectional view taken along line -B, and FIG.
It is sectional drawing which follows a line.

This linear reciprocating device is composed of a base 10 made of a thick plate material having a concave portion formed on the back side as shown in FIG.
End plates 11 are provided at both ends of the base 10.
a, 11b are fixed, and the base body 10 and the two end plates 11a, 11b form an apparatus main body 12.

Each end plate 11a, 11b
Are fixed to the base 10 such that their respective upper surfaces are substantially flush with the surface of the base 10, and the end plates 11 a and 11 b face downward from the rear surface of the base 10 as shown in FIG. It protrudes, and the device main body 12 is generally gate-shaped. When the apparatus main body 12 is mounted on a member such as a pedestal (not shown), the end plates 11a, 1
The back surface of the end plate 1b is fixed to a member such as a pedestal at the end plate. Therefore, two mounting holes 1 are provided in each of the end plates 11a and 11b.
3 are formed, and the apparatus main body 12 can be installed by bolts (not shown) penetrating these mounting holes 13. As shown in FIG. 1, the apparatus main body 12 is used by being fixed to a member such as a pedestal (not shown) in a horizontal state, for example.

On the back side of the base 10, a concave portion 14 is formed over the entire length, and a cylinder tube 15 having a quadrangular cross section is fixed in the concave portion 14, and both ends of the cylinder tube 15 are connected to end plates 11a and 11b. Fixed.
As described above, since the cylinder tube 15 is attached to the concave portion 14 provided on the back surface side of the base 10, the height dimension of the apparatus main body 12 can be reduced.

The cylinder tube 15 is fixed to the base 10 on the front side, and a slit 16 is formed on the back side in the longitudinal direction as shown in FIG. Reciprocally mounted.

As shown in FIG. 7, in the cylinder tube 15, pressurizing chambers 18a and 18b are formed on both sides of the piston 17, and when compressed air is supplied into the pressurizing chamber 18a, the piston 17 is moved to the position shown in FIG. At the right side and pressurized chamber 1
If it is supplied into 8b, it will move to the left. As shown in FIG. 5, two supply / discharge ports 19a and 19b are formed in the end plate 11b to supply compressed air to the respective pressurizing chambers 18a and 18b. However, each supply / drain port is connected to the other end plate 11
a, and one supply / discharge port may be formed on each of both end plates.

In order to prevent the compressed air from leaking from the slit 16, a thinner seal band 21 for sealing the slit 16 from the inside is provided inside the cylinder tube 15, and the slit 16 is sealed from the outside outside the cylinder tube 15. An outer seal band 22 is provided.

A piston mount 23 is mounted along a back surface of the cylinder tube 15 so as to be reciprocally movable in a linear direction.
This piston mount 23 is the inner seal band 21
The outer seal band 22 is connected to the piston 17 via a piston yoke 24 incorporated between the outer seal band 22 and the outer seal band 22. Therefore, the piston mount 23 is
Moves in the axial direction, the seal bands 21 and 22 move in the linear direction while preventing the leakage of the compressed air in the pressurizing chambers 18a and 18b.

As shown in FIG. 6, two guide rails 25 are fixed on both sides of the cylinder tube 15 on the back surface of the base 10, and a slide block 26 is slidably mounted on each guide rail 25. Is provided. A reciprocating member 27 is fixed to each slide block 26, and each reciprocating member 27 is fixed to the piston mount 23.

The reciprocating member 27 has a base 27a and an inner vertical portion 27b projecting downward from the base 27a in the figure.
A horizontal portion 27c protruding outward from the inner vertical portion 27b on the side surface of the base 10, and an outer vertical portion protruding from the tip of the horizontal portion 27c along the side surface of the base 10 toward the surface of the base 10. 27d.

A screw hole 28 is provided on the surface of the two outer vertical portions 27d. A screw member is screwed into the screw hole 28, and a support member is attached so as to bridge the two vertical portions 27d. A driven member can be arranged on the member. When a jig is used as a driven member, the jig can be moved in a linear direction, and when a work is used as a driven member, the work can be moved with a predetermined stroke.

As shown in FIG. 4, both end plates 11a and 11b have shocks to absorb the shock applied to the piston mount 23 when the piston mount 23 is driven to the stroke end position of the reciprocating motion. An absorber 31 is attached, and a stopper 32 is attached to regulate the position of the stroke end.

In order to detect that the piston mount 23 has moved to the position of the stroke end, magnets 33 are attached to the respective reciprocating members 27 as shown in FIG. A sensor groove 34 for mounting a sensitive magnetic sensor is formed in the base 10.

On both sides of the base 10, as shown in FIG.
A side cover 35 extending downward is attached,
Both ends of the side cover 35 are end plates 11a, 1
1b. Further, the side cover 35 has a bent portion 35a that goes around the step portion 36 provided on each of the end plates 11a and 11b. In this manner, the side surface of the piston mount 23 is covered by the side cover 35, and foreign matter is prevented from entering the inside from the side surface side of the apparatus main body 12.

In the linear reciprocating apparatus having the above-described structure, the base 10 is located on the front side of the apparatus main body 12 where the driven member is disposed, and the cylinder tube 15 is located on the back side of the base 10. Is attached to the cylinder tube 15
The base 16 is used as a front cover that covers the slit 16 because the slit 16 formed in the front surface of the main body 12 is opened facing the back side of the main body 12. It is not necessary to cover the whole with a surface cover. In addition, the slit 16 is
The opening is formed on the back side of the member and faces the opposite side to the driven member, so that it is possible to reliably prevent foreign matter from entering the slit 16.

The present invention is not limited to the above embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

For example, this linear reciprocating device can be used not only in a horizontal state as shown in FIG. 1, but also in a vertical state or an inclined state.

[0029]

According to the present invention, the base is arranged on the front side, and the cylinder tube is mounted on the back side.
Since the slit of the cylinder tube is located on the back side, the base will function as a surface cover that covers the cylinder tube, and without using a surface cover to cover the entire front side of the device, It is possible to reliably prevent a foreign substance from entering the device.

Since foreign substances can be prevented from entering between the seal hand and the cylinder tube, leakage of fluid from the cylinder tube can be reliably prevented, and the durability of the apparatus can be improved.

By mounting the cylinder tube in the recess formed on the back side of the base, the height of the apparatus main body can be reduced.

By attaching the side cover to the side surface of the base, it is possible to prevent foreign matter from entering from the side surface of the base.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a linear reciprocating device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a bottom view of FIG. 1;

FIG. 5 is a right side view of FIG. 1;

FIG. 6 is a sectional view taken along line AA in FIG. 2;

FIG. 7 is a sectional view taken along the line BB in FIG. 6;

FIG. 8 is a sectional view taken along line CC in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base 11a, 11b End plate 12 Main body 14 Concave part 15 Cylinder tube 16 Slit 17 Piston 18a, 18b Pressurization room 21 Inner seal band 22 Outer seal band 23 Piston mount 24 Piston yoke 25 Guide rail 27 Reciprocating member 31 Shock absorber 22 Stopper 35 Side cover

Claims (3)

[Claims] 1. A cylinder tube provided on a back surface side of a base along a longitudinal direction and having a slit formed on a back surface side; and a shaft arranged in the cylinder tube by a fluid pressure supplied to a pressurizing chamber. A piston that reciprocates in the direction, and a piston yoke that is reciprocally disposed on the back side of the cylinder tube and that is incorporated between an inner seal band and an outer seal band that seal the inside and outside of the slit. A piston mount connected to a piston, and a reciprocating member fixed to the piston mount and extending from the back side of the base to the front side via the side surface side, the base covering the slit A linear reciprocating device wherein the reciprocating member is driven by the piston in a state. 2. The linear reciprocating device according to claim 1, wherein a side cover for covering a side surface of the piston mount is provided on a side surface of the base. 3. The linear reciprocating device according to claim 1, wherein a concave portion is formed on a back surface of the base, and the cylinder tube is attached to the concave portion.