JPH034005A - Rodless cylinder - Google Patents

Abstract

PURPOSE:To achieve certain dust proof by providing a fitted hole at a position communicating with a cutoff groove in a cover to insert therein the ends of a dust proof belt and a seal belt and insert therein an oscillatable push fixture, so that an oscillation supporting point has one side pushed against the seal belt by using a cap screw to push the dust proof belt against the upper face of the cutoff groove on the other side. CONSTITUTION:A rectangular fitted hole 25, into which the ends of a seal belt 11 and a dust proof belt 15 are inserted, provided in the upper end of a cover 3 so as to communicate with a cutoff groove 2, allowing the upper face 25a to agree with the upper end of the cutoff groove 2. A push fixture 27 is inserted in between the dust proof belt 15 and the end of the seal belt 11. The push fixture 27 is formed in an angle shape that a pair of side plates 29 are bent at a right angle to both edge portions of a plane plate 28 and the peak is located at the center. The fixture 27, delivered into the end of the fitted hole 25, has one end pushed against the belt 11 with the peak serving as a lever by in-screwing a cap screw 33 and the other end pushed against the upper end of the fitted hole 25 where the dust proof belt 15 agrees with the upper end of the cutoff groove 2. It is thus possible to achieve certain dust proof.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a method of reciprocating a piston fitted in the cylinder tube using pressurized air, thereby forming a connecting portion protruding from the piston on the outer surface of the cylinder tube. Regarding the rodless cylinder 1 which is made to reciprocate along a longitudinal cut groove, improvements have been made in particular to the mounting structure of the seal belt and dustproof belt end portions that close the inner and outer sides of the cut groove, respectively. Regarding the added rodless cylinder.

Problems to be solved by conventional technology and the invention A rodless cylinder has a longitudinal cut groove formed on its outer surface, and a piston is tightly and slidably inserted into a cylinder tube whose both ends are closed with covers. Then, by protruding the connecting part protruding from the piston to the outside of the cylinder tube through the cut groove and reciprocating the piston with pressurized air, a rubber seal belt that closes the inner surface of the cut groove is inserted into the piston. In addition, a dust-proof belt made of a metal plate with a goto belt attached to the bottom surface, which closes the outer surface of the cut groove, is inserted into each of the connecting parts, and the connecting part is reciprocated along the cut groove. Since the seal belt and the dustproof belt are subjected to tensile force in the longitudinal direction, which is the direction of movement of the piston, when the piston moves back and forth, both ends thereof must be fixed to the cover.

By the way, conventionally, the method of fixing the ends of the seal belt and the dustproof belt was to stack the dustproof belt itself with the rubber belt removed, place it on top of the seal belt with a spacer in between, and fit it into the mounting groove formed on the outer periphery of the cover. Either use screws to hold it down on the bottom side of the mounting groove, or place the dustproof belt on top of the seal belt with the rubber belt still attached, fit it into the installation groove, and hold it down with a presser metal fitting with a tooth-shaped front. However, in both cases, when the dust-proof belt is pressed down, the rubber seal belt is compressed and sinks, and the vicinity of the attachment end of the dust-proof belt rises up in an oblique position. A gap is created between the belt and the cut groove, which impairs the dustproof effect, and normally, in order to prevent dust from entering the cut groove at the part where the dustproof belt is introduced from the cut groove into the connecting part of the piston, Dust-proof scrapers made of rubber or synthetic resin are attached to the front and back of the table attached to the joint in the direction of movement, so that they touch the -L side of the dust-proof belt. This has the drawback of causing the scraper to ride on the raised part of the belt, causing early wear of the scraper.

Means for Solving the Problems As a means for solving the above-mentioned problems, the rodless cylinder of the present invention has a dustproof belt and a part 9a of the seal belt at a position continuous with the cover cutout, "II ifI". A mounting hole for insertion is formed so that the end of the dustproof belt is located at approximately the same height as the dustproof belt with the cut groove closed;
In addition, the dust-proof belt and the seal belt are housed so that there is a space between the ends of the belts in the overlapping direction, and the dust-proof belt and the seal belt are placed between the ends of the belts so as to be able to swing around the fulcrum in the direction in which the ends of the belts overlap. By inserting a movable pressing bracket, pressing one side of the pressing bracket from its swinging fulcrum with a retaining screw, and swinging it around the swinging fulcrum, the other end of the pressing bracket can be moved. The dustproof belt is fixed by pressing it against the top surface of the mounting hole.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, and by screwing in the holding screw, the pressing fitting is swung between the dust-proof belt and the end of the seal belt around the fulcrum, and the lever action is utilized. Since the end of the dustproof belt is pressed against the upper surface of the mounting hole and fixed, the end of the dustproof belt can be used to close the cut groove.
In addition, it can be securely fixed at approximately the same height as the dust-proof belt in the part, and the outer surface of the cut groove can be reliably closed (I7) without the vicinity of the installation end of the belt being floating. It prevents dust from entering, and also prevents the dust-proof scraper attached to the table attached to the piston connection from being rubbed strongly by the raised part of the dust-proof belt and wears out. It can extend the useful life,
Also, unlike when tightening a set screw by directly applying it to the dust-proof belt, the rotational force of the screw does not act on the dust-proof belt.
This also has the effect of avoiding twisting of the dustproof belt due to the rotational force.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 3, the rodless cylinder to which this embodiment is applied has a longitudinal cut groove 2 that is hollow and opens outward from the top surface, and covers 3 and 3 at both ends.
A piston 5 with a gasket 6 fitted on its outer periphery is tightly and slidably fitted into a cylinder tube l with a substantially rectangular cross section closed by a cylinder tube L, and a connecting portion 7 protruding from the upper surface of the piston 5 is fitted into a cylinder tube l having a substantially rectangular cross section. A table 9 is fixed to the protruding portion 8 of the cut groove 2 which protrudes upward through the cut groove 2 described above.
A rubber seal belt 11 for preventing air leakage is fitted into the fitting part 2aJ on the inner surface side, and both ends of the belt are fixed to the cover 3 as will be described in detail later, and the piston 5 is attached in the middle.
It is inserted so as to slip into the insertion passage 13 formed inside the groove 2, and the fitting part 2b on the outer surface side of the cut groove 2,
A dustproof belt 15 made of a metal plate with a rubber belt i6 attached to its lower surface is fitted, and its both ends are fixed to the cover 3 as will be described later. The dust-proof belts are inserted into the insertion passage 18 and are also attached to the front and rear ends of the table 9! 5 is introduced into the insertion passage 18, a synthetic resin dustproof scraper 2I supported by the bin 20 so as to be able to swing freely is pressed against the upper surface of the dustproof belt 15 by the elastic expansion force of the coil spring 22, and the dust is removed. When air is alternately supplied and discharged from the respective boats 24 to the chambers on both sides of the piston 5, the piston 5 reciprocates within the cylinder duplex 1. The table 9 reciprocates along the cut N2 while passing the seal belt II and the dustproof bell 15 through the insertion passage 13.18.

Next, the mounting structure of the above-mentioned seal bell) It and both ends of the dust-proof belt 15 will be explained with reference to Figs. 4 to 6. A mounting hole 25 in the front and rear direction with a rectangular cross section into which the end of the seal bell 11 and dustproof belt 15 are inserted is provided at the upper end so as to be continuous with both ends of the cut groove 2, and the upper surface 25a of the cut groove 2, and the bottom surface 25b has a sloped surface on the inner side of the cut groove 2.
The dustproof belt 15 with the rubber belt 16 removed is inserted along the upper surface 25a of the mounting hole 25 up to the center in the longitudinal direction, while the seal belt +1 is the bottom surface 2 of the mounting hole 25
5a to a position beyond the center, and a pressing fitting 27 is inserted between this dustproof belt 15 alone and the end of the seal belt 11.
A pair of side plates 29 are bent at right angles on both edges of one end of a flat plate 28 that is shorter than the length of the mounting hole 25, and the apex of each side plate 29 is located approximately at the center of the flat plate 28 in the length direction. It forms a chevron shape with rounded apexes 30, and as shown in FIG.
It is inserted while resting on the part, as shown in Figure 5.
When the pressing fitting 27 is fed to the inner end of the mounting hole 25, the apex 30 of the side plate 29 is located inward than the longitudinal center of the mounting hole 25. A threaded hole 32 reaching into the mounting hole 25 is formed on the upper surface of the cover 3 corresponding to the longitudinal center of this mounting hole 25, into which a presser screw 33 is screwed. ing.

This embodiment has such a structure. As shown in FIG. and,
The tip of the presser screw 33 is located on the upper surface of the presser fitting 27 on the side plate 2.
9, the apex 30 of the side plate 29 is pressed against the hem 11a of the seal belt 2.
While crushing the portion and pressing it against the bottom surface 25b of the mounting hole 25, the pressing metal fitting 27 swings about this apex portion 30 so that the inner end thereof is tilted upward, and the inner end of the flat plate 28 is pressed against the bottom surface 25b of the mounting hole 25. part hits the bottom surface of the end of the dustproof belt 15 and the mounting hole 2
The dust-proof belt I5 is pressed against the upper surface 25a of the dust-proof belt I5 so that the end of the dust-proof belt +5 closes the cut groove 2.
At the same time, as described above, the vertex 30 of the side plate 29 of the pressing fitting 27 presses the hem 11a of the seal belt 11 against the bottom surface 25b of the mounting hole 25, so that the seal belt 11 It is fixed in the mounting hole 25.

In this way, in this embodiment, when the cap screw 33 is screwed in,
The pressing fitting 27 presses the hem 11a of the seal belt 11 with the apex portion 30 of the side plate 29 and swings using that portion as a fulcrum, and the inner end of the flat plate 28 attaches the dustproof belt 15 to the upper surface 25a of the mounting hole 25. Therefore, even though the ends of the seal belt II and the dust-proof belt 15 are fixed at the same time with the pressing fitting 27, the dust-proof belt! 5
can be reliably fixed at approximately the same height as the part of the dustproof belt 15 that closes the cut groove 2 regardless of the seal belt II, and the dustproof belt 15 and the rubber belt I6 near the attachment end It does not float up, the outer surface side of the cut groove 2 is reliably closed, and the dust-proof scraper 2! is a dustproof belt that is flat even near the installation end of the dustproof belt 15! 5, there is no risk of early wear.
Dust-proof belt 15
will not be twisted by the rotational force.

FIG. 7 and FIG. 8 show another embodiment, in which the pressing fitting 35 connects straight portions 36 that are parallel to each other and have different levels to an oblique connecting portion 37.
The upper surface of the inner straight portion 36 and the lower surface of the outer straight portion 36 have tooth-shaped pressing surfaces 38 and 39, respectively, and are inserted into the mounting hole 25 of the cover 3. It is freely supported by a shaft 40 extending across the mounting hole 25 between the end of the dustproof belt 15 and the seal belt 11, and the presser screw 33 is screwed into the outer side of the presser fitting 35. By pressing the upper surface of the straight part 36, the inner straight part 36 is swung upward, causing the inner pressing surface 38 to bite into the lower surface of the dust-proof belt 15, so that the mounting hole 25 is closed. The end of the seal belt 11 is fixed by pressing it against the upper surface 25a, and by pushing the outer pressing surface 39 into the upper surface of the seal belt 11 and pressing it against the bottom surface 25b of the attachment hole 25. However, the end of the dustproof belt 15 is pressed against the second surface 25a of the mounting hole 25 regardless of this, and the part of the dustproof belt that closes the cut groove 2 as in the previous embodiment! 5, and the ends of the dustproof belt 15 and the seal belt 11 are fixed by biting tooth-shaped pressing surfaces 38 and 39 over a wide area, respectively. There is an advantage that they can be fixed more firmly than in the embodiment.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a sectional view taken along the BB line in FIG. A perspective view, and FIG. 5 is an enlarged sectional view showing details of the mounting structure of the seal belt and dustproof belt.
FIG. 6 is a sectional view taken along line CC in FIG. 5, FIG. 7 is a sectional view of a seal belt, a dustproof belt, and a mounting structure according to another embodiment, and FIG. 8 is a sectional view taken along line DD in FIG. 7. be. 1 Rainbow cylinder tube 2: Cut groove 3: Cover 5: Piston 7: Connection part 11: Seal belt 13: Insertion passage 15: Dust-proof bell) +8: Insertion passage 25: Mounting hole 25
a: Top surface 27: Pressing metal fitting 28: Flat plate 29: Side plate 3
0: Vertex 32: Screw hole 33: Holding screw 35: Pressing fitting 40: Shaft 38: Pressing surface 1 Fig. 2

Claims (1)

[Claims] A piston is tightly and slidably fitted into a cylinder tube which has a longitudinal cut groove formed on its outer surface and whose both ends are closed with covers, and a connecting portion protruding from the piston is passed through the cut groove and inserted into the cylinder tube. A seal belt made of an elastic material that protrudes to the outside of the cylinder tube and closes the inner surface side of the cut groove is inserted into the piston, and a dustproof belt that closes the outer surface side of the cut groove is inserted into the connecting part, In the rodless cylinder, the connecting portion is configured to reciprocate along the cut groove, and a mounting hole is formed in the cover at a position continuous with the cut groove, into which the end portions of the dustproof belt and the seal belt are inserted. and the end of the dustproof belt is located at approximately the same height as the dustproof belt with the cut groove closed, and the belt is housed so that there is a gap between the ends of the belt in the overlapping direction. At the same time, between the ends of the dust-proof belt and the seal belt, a pressing metal fitting that can swing about a fulcrum in the direction in which the ends of both belts overlap is inserted, and the pressing metal fitting is rotated with a cap screw. The dustproof belt is fixed by pressing the dustproof belt against the upper surface of the mounting hole at the end of the other side of the pressing fitting by pressing one side from a swinging fulcrum and swinging about the swinging fulcrum. rodless cylinder with