JPH01203703A - Reciprocating drive device by tube pressure - Google Patents

Abstract

PURPOSE:To obtain a small reciprocating drive power by a new means by forming the device in the title with a power transmission element making reciprocating replacement along a rail, a tube means arranged along the rail, push- pressing rollers of the tube means provided on the power transmission element and fluid supply/discharge holes. CONSTITUTION:A power transmission element 1 is formed with a table 12 and a saddle 13 and a tube means 15 consisting of mutually combining membranes 17 and rigid plates 31 fluid lightly is arranged along a rail 16. The tube means 15 is push-pressed by rollers 121-124 supported through a bearing staying on the side part of this saddle 13 so as to block a hollow part 18. Here, the power transmission element 1 is moved through the rollers 121, 122 or 123, 124 by supplying fluid from a fluid supply/discharge hole 191 or 192 so as to expand the hollow part 18. Therefore, the leakage of fluid can be reduced, the cross section can be made in a rectangular shape and a rodless type moving table can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tube pressure/reciprocating drive device that can obtain reciprocating driving force by utilizing tube pressure generated by fluid pressure.

[Conventional technology]

A normal reciprocating drive device using fluid pressure is achieved by a piston-cylinder mechanism, but this may not always be appropriate depending on the application, and therefore, conventionally,
Various alternatives are provided.

[Problem to be solved by the invention]

An object of the present invention is to provide a tube pressure/reciprocating drive device that can obtain a relatively small reciprocating driving force by a completely new and simple means.

[Means to solve the problem]

The tube pressure/reciprocating drive device according to the present invention includes a track, a power transmission element guided in a reciprocating manner along the track,
tube means disposed along the orbit and capable of expanding and contracting in volume within a certain range, and the power transmission element includes a roller that presses the tube means from the outside so that the central axis of rotation is aligned with the orbit. The tube means is provided rotatably at right angles to the tube means, and each end of the tube means is provided with a fluid supply hole communicating with the hollow portion of the tube means.

[Effect]

When pressurized fluid is supplied and discharged under predetermined conditions to the fluid supply/discharge hole communicating with the hollow portion of the tube means, the tube means expands into a certain shape only in one example of the roller. The tube pressure induced in this case presses the rollers and causes the power transmission element to displace its position along the track.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 show a first embodiment of a tube pressure reciprocating drive device.

Reference numeral 1 denotes a power transmission element consisting of a table 12 and a saddle 13 that supports the table.

141 and 142 are side plates, and a straight tube means 15 and a guide rod 16.16 are installed between these side plates.

The tube means 15 has elongated expandable and contractible membranes 17.17 superimposed on each of its upper and lower sides, and both ends of each membrane 17.17 are fluid-tightly connected by U-shaped rigid plates 31.31. Its own straight posture can be maintained within a certain length range by its own rigid plate 31, 31, but when the length exceeds a certain length, it is necessary to support the middle part of the length with an appropriate support structure. Fluid supply and discharge holes 191 and 192 communicating with the hollow portion 18 are formed at each end of the tube means 15;
i141.142. When pressure fluid at a predetermined pressure is supplied into the hollow portion 18 from the fluid supply/discharge holes 191 and 192, the membranes 17 and 17 expand up and down to assume a fixed shape.

Note that the membrane 17 is made of a flexible material such as rubber or synthetic resin.

The guide rod 16 connects the power transmission element l to the tube means 15.
121 and 122, which are configured to support the lower part of the saddle 13 through appropriate engagement means 120, and 1 for accurately guiding the saddle 13 along the longitudinal direction.
23 and 124 are a pair of rollers, and each pair presses the membranes 17 and 17 disposed above and below the tube means 15 from the outside thereof, thereby flattening the tube means 15 and closing the hollow portion 18. It acts on These pairs of rollers 121 and 122 and 123 and 124 have their respective rotational center axes 125...
are arranged perpendicularly to the longitudinal direction of the saddle 13, and both ends of each rotation center shaft 125 are mounted on the sides of the saddle 13 with bearings 3.
It is pivotally supported via 2... Here, each pair of rollers 121 and 122 or 123 and 124 may be freely brought close to each other elastically using a spring or the like. 126 is a cover for the bearing portion. In addition, 1
Reference numerals 27 and 128 are bellows for preventing dust from entering the vicinity of the tube means 15 and inside the saddle 13, and 129 and 129 are construction members that connect and support the respective side plates 141 and 142.

When using this embodiment of the apparatus, the object to be reciprocated is fixed to the table l. When displacing the object in the direction of the arrow fl, the fluid supply/discharge hole 19
1 supplies pressure fluid, while the other fluid supply/discharge hole 19
2, the hollow part 18 is opened to the atmosphere or set to negative pressure in order to remove the pressure fluid. As a result, as shown in FIG. 1, one side of the rollers 121 and 122 expands into a fixed shape, and one side of the other rollers 123 and 124 becomes flat.

The rollers 121 and 122 are thus pressed by the membrane 17.17 of the tube means 15 in the direction of the arrow f1, so that said object is displaced together with the power transmission element 1 in the direction of the arrow f1. On the contrary, point the object with the arrow f
When displacing in the opposite direction of 1 (Y, fluid supply/discharge hole 191
The relationship between supply and discharge of pressure fluid from 192 is reversed to that described above.

Then, the object will be displaced in the direction opposite to the arrow f1 due to the opposite effect to that described above.

Next, FIGS. 4 to 7 show a second embodiment of the tube pressure reciprocating drive device.

41 is a power transmission element with a U-shaped cross section, and the upper surface is the table 4.
2 and a saddle 43.

Both side plates 441 and 442 are connected by a box case 443. A guide hole 444 is formed along the longitudinal direction of the box case 443, and a tube means 415 is attached to the inner bottom surface of the box case 443. There is.

This tube means 415 is composed of an elongated flat plate 4151 and an expandable and contractible membrane 4152 superimposed on the upper surface of the flat plate 4151. This configuration is fluid-tightly coupled to a flat plate 4151.

421 and 423 are rollers that press and flatten the membrane 4152 of the tube means 415 to close the hollow portion 418, and are arranged so that the central axes of rotation 425 and 425 are perpendicular to the longitudinal direction of the tube means 415; Dynamic center axis 4
Both ends of 25 and 425 pass through guide holes 444 of the box case 443, and are pivotally mounted on the sides of the saddle 43 that straddles the box case 443 via bearings 61. Guide wheels 4441 are placed near each end of the two rotation center shafts 425, 425, respectively.
5, and its movement trajectory is restricted by the peripheral edge 4442 of the guide hole 444, and functions to linearly displace the saddle 43 along the longitudinal direction of the tube means 415. .

Note that 491 and 492 are fluid supply and discharge holes.

In this embodiment, unlike the first embodiment, the tube means 4
Only the membrane 4152 on the upper side of the tube 415 expands into a certain shape, so that the rollers 421, 423 are pressed in the longitudinal direction of the tube means 415. In this case,
In order to make the pressing force on the rollers 421 and 423 more effective, the flat plate 4151 is made of a soft material, and the roller 421
．． It is preferable that the pressing force acts on the two-ring dividing line of 423. As a result, the overall height of this embodiment can be set lower than that of the first embodiment.

Furthermore, FIGS. 8 and 9 show a third embodiment of the tube pressure reciprocating drive device.

Reference numeral 81 denotes a power transmission element, in which bearings 82 and 82 are provided at the center of covers 841 and 842 at both ends of the cylindrical casing 843.
A drive shaft 811 is rotatably mounted via the drive shaft 811, and a pair of arms 81 extend from the drive shaft 811 in the direction of the rotation radius.
2.812, and a reinforcing plate 813 installed between these arms 812 and 812 and also fixed to the drive shaft 811.

This power transmission element 81 is connected to both end covers 841 and 842 and the bearing 8 through a drive shaft 811 whose axial displacement is restricted.
2.82, only reciprocating rotational displacement within a certain range is freely guided).

The inner surface of the cylindrical casing 843 is made up of a flat plate 8151 and a membrane 8152 superimposed on the inner surface of the flat plate 8151, and both edges of the membrane 8152 are held fluid-tight through pressing plates 851 and 851 to form a hollow part 818. A tube means 815 is attached along the rotational displacement locus of the power transmission element 81, and both ends thereof are joined to each surface of a protrusion 844 provided in a cylindrical casing 843. . Further, the protrusion 844 has fluid supply and discharge holes 891 and 89 that communicate with the hollow part 818 of the tube means 815 from the outside.
2 is provided.

821 is a roller that presses and flattens the membrane 8152 of the tube means 815 to close the hollow portion 818, and a rotation center shaft 8211 is installed between the pair of arms 812 and 812.
is pivotally installed through bearings 8261. The fact that the rotation center axis 8211 is perpendicular to the longitudinal direction of the tube means 815 is the same as in the previous embodiment. Here roller 8
21 is elastically attached to the tube means 81 by the biasing force of a spring, etc.
It is free to press the membrane 8152 of No. 5.

This embodiment differs from the previous embodiment in that rotational reciprocating displacement is performed instead of linear reciprocating displacement. That is, a membrane 8152 that expands into a certain shape when pressurized fluid is supplied from the fluid supply/discharge holes 891 and 892 is attached to the roller 82.
1 in the direction of arrow f2, and the drive shaft 811
21 and is rotated in the direction of arrow f2.

On the contrary, if pressure fluid is supplied from the fluid supply/discharge holes 891 and 892, the drive shaft 811 will be rotationally displaced in the direction opposite to the arrow f2 due to the opposite effect to the above. Therefore, if an object to be reciprocated is connected to the output end 8111 of the drive shaft 811, the object will be rotated once with the drive shaft 811.
As a result, it is rotated and displaced back and forth.

〔Effect of the invention〕

As mentioned above, according to the present invention, the tube means 15.415.81
5, rollers 121 and 122.123 and 124.42
1.423 and the power transmission element 1.41.81, etc., it is possible to obtain a reciprocating displacement driving force using fluid pressure, and in this case, the tube means 15. Since 415.815 does not have sliding parts such as a piston-cylinder mechanism, fluid leakage during reciprocating displacement operation can be minimized, and it can be manufactured with a rectangular cross section. Moreover, a rodless type moving table can be easily obtained.

Further, according to the second aspect of the invention, the overall height of the device can be set low, and according to the third aspect of the invention, rotational reciprocating displacement drive can be obtained.

[Brief explanation of the drawing]

1 to 3 relate to a first embodiment of the present invention, in which FIG. 1 is a partially cross-sectional overall front view, FIG. 2 is a partially omitted overall plan view,
FIG. 3 is an explanatory view taken along the line A-A in FIG. 1, and FIGS. 4 to 7 relate to the second embodiment of the present invention, and FIG. 6 is a partially omitted overall plan view, FIG. 6 is an explanatory view taken along the line B-B in FIG. 4, and FIG. 7 is an overall perspective view.
8 and 9 relate to a third embodiment of the present invention, with FIG. 8 being a front sectional view and FIG. 9 being a side sectional view. 1.41.81...Power transmission element 15.415.815...Tube means 16.443
．． 83...Trajectory 17.4152...Membranes 121 and 122 and 123 and 124.42142
3.821...Roller 125.425.8211...Rotation center shaft 18.41
8.818...Hollow part 19L192, 491.492.891.892...
Fluid supply hole 4151... Flat plate applicant Kitagawa Iron Works Co., Ltd. Figure 9? 3 and 1811 Procedural amendment (method) June 1988 230 1. Indication of the case 1988 Patent Application No. 029310 2. Name of the invention Tube pressure/reciprocating drive device 3. Person making the amendment Relationship to the case Application Address: 77-1 Motomachi, Fuchu City, Hiroshima Prefecture 726
0847-45-4560 (Main) 5, Subject of correction
Drawing 6, Contents of correction

Claims (1)

[Claims] 1. Consisting of a track, a power transmission element guided so as to be reciprocally displaceable along the track, and a tube means arranged along the track and capable of expanding and contracting in volume within a certain range. and the power transmission element is provided with a roller that presses the tube means from outside so as to be rotatable with its rotation center axis perpendicular to the orbit, and a tube means is provided at each end of the tube means. A tube pressure/reciprocating drive device consisting of a fluid supply/discharge hole that communicates with the hollow part of the tube. 2. The tube means is formed of two expandable and contractible membranes,
2. The tube pressure/reciprocating drive device according to claim 1, wherein the outer surfaces of the membranes are pressed by at least a pair of opposing rollers. 3. The tube pressure/reciprocating drive device according to claim 1, wherein the tube means is formed of a flat plate and an expandable and contractible membrane joined to the flat plate, and the outer surface of the membrane is pressed by a roller. 4. The tube pressure according to claim 1, wherein the orbit is annular.
Reciprocating drive device.