JP3214403B2 - Slide unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits the movement of an inner moving body inside a tube to an outer moving body outside the tube through a longitudinal slit provided in the tube, and penetrates the outer moving body. The outer moving body relates to a slide unit including a main body member and a band cover that covers the outer seal band, wherein the slit is closed by an outer seal band.

[0002]

2. Description of the Related Art A rodless cylinder is known as a slide unit having a slit in a tube. For example, in JP-A-6-42508 and JP-A-6-30504, a piston in a cylinder tube protrudes outward from a slit of the tube, and the protruding portion expands left and right to form a table portion. A groove through which the outer seal band passes is formed between the walls, and front and rear wall members are fixed to the front and rear of the left and right walls, and the slide table (the main body member of the outer moving body) is surrounded by the left and right walls and the front and rear wall members. A sealing groove is formed in the left and right walls, and a locking groove is formed in the longitudinal direction inside the left and right walls. The engaging and disengaging portion provided on the band cover is engaged with the locking groove to form a seal band. The passage space is closed and the outer seal band is covered.

[0003]

In the above, when the outer seal band is covered with the band cover, the band cover is elastically deformed, and the band cover is fitted into the locking groove by utilizing the deformation. However, when trying to remove the band cover for some reason, the engaging and disengaging portion and the locking groove are engaged inside the left and right walls, so it can be easily removed from the outside of the table portion. It was not possible to remove the front and rear wall members from the table, and then remove the band cover.

Further, in the conventional apparatus, since a guide member for guiding the outer side surface of the outer seal band is separately attached to the lower surface of the front and rear wall members, the number of parts increases, and there is a problem that the assembling is troublesome. Further, when the outer seal band is a metal band, when it comes into direct contact with the outer moving body usually made of an alloy, abrasion powder is generated at the contact portion, and the abrasion powder adheres to the outer seal band, and the outer seal band is formed. The service life is shortened and the sealing function is reduced. Furthermore, in the conventional one, although the table portion was integral with the piston, the left and right side walls and the front and rear wall members were separate,
There was also trouble in attaching the front and rear wall members, and this was not a preferable part form. Furthermore, in the above-mentioned one, the scraper is attached to the outer periphery of the lower surface of the table portion. However, since a long groove is provided on the lower surface of the table portion and the scraper is pushed into the groove, there is a disadvantage that the assembling is not easy. .

An object of the present invention is to attach a band cover,
An object of the present invention is to provide a slide unit that can be easily removed. Also, by using a part of the band cover as a guide member for the outer seal band, the number of parts can be reduced,
It is an object of the present invention to provide a slide unit that can save assembling work. Another object of the present invention is to provide the slide unit including a band cover that can suppress generation of abrasion powder between the slide unit and the outer moving body. Another object of the present invention is to provide a slide unit having a structure in which a scraper can be easily attached to a lower portion of the outer moving body and the scraper does not hinder the work when the band cover is removed. Another object of the present invention is to reduce the number of parts of the main body member of the outer moving body to which the band cover is attached.

[0006]

According to the present invention, the movement of the inner moving body inside the tube is transmitted to the outer moving body outside the tube through a longitudinal slit provided in the tube, and the movement of the inner moving body is transmitted through the outer moving body. The outer moving body is a slide unit having a main body member and a band cover covering the outer seal band, wherein the outer moving body has a main body member in the center thereof. -Le
A ring with a seal band passage space through which the band passes
Between the main body of the outer moving body and the seal band passage space.
Van and a band cover which is mounted so as to cover
Elastically deformable engaging and disengaging claws provided on the cover
Formed in the lower part of the front and rear walls in the axial direction, the locking and unlocking claws can be locked and unlocked
Between the lower surface of the main body member and the outer surface of the tube facing the lower surface of the main body member.
The band cover for the locking part by forming a predetermined gap in
Release the locking state of the disengagement claw from the outside of the outer moving body
It is characterized in that it is a removal operation part (claim 1). According to this configuration, the band cover can be attached to the outer moving body with one touch, and can be detached extremely easily by operating from the outside of the outer moving body.

If the lower surface of the engaging claw is used as a guide surface for the outer surface of the outer seal band (claim 2) , the guide surface of the outer seal band is formed on the outer movable body side only by attaching the band cover. Compared with the case where a guide surface is separately provided, the labor for assembling can be omitted.

It is more preferable to provide a guide surface in the width direction of the outer seal band and a guide surface on the outer side inside the band cover (claim 3) . According to this, the outer seal band is
When relatively moving in the band passing space of the outer moving body,
Since the outer side surface and the width direction end surface do not contact the outer moving body, when the outer moving body is made of metal, generation of abrasion powder from the outer moving body side can be eliminated, and the outer seal band can have a longer life.

In order to manufacture the band cover at a low cost, the band cover is preferably made of resin (claim 4) .
If it is made of a resin material having good slidability, the movement of the outer seal band becomes smooth .

A lower portion of the main body member of the outer moving body is provided with a double lip scraper surrounding the entire circumference and closing a gap between the lower surface of the main body member of the outer moving body and the outer surface of the tube. a position corresponding to the locking portions, may there form a notch for releasing operation (claim 5). According to this, the gap between the outer moving body and the outer surface of the tube is closed by the scraper, and dust protection of that portion is performed twice, but when it is desired to remove the band cover, push up the outer lip,
It is sufficient to push the engaging claw from the notch for operation, and even if it is a double lip and has a high dustproof function, the releasing operation is not hindered by the inner lip.

The scraper has an outer surface exposed to the outside.
(Claim 6). In this case, since the scraper is completely visible from the outside, if the scraper is colored, the color can be utilized in the design of the slide unit.

An annular scraper is fitted into an annular scraper fitting step provided on the lower surface of the outer moving body, and the scraper and the outer moving body are fitted into each other to prevent the scraper from coming off. An engaging means is provided (claim 7) . In this case, since it is not pushed into the long groove as compared with the case where the long scraper mounting groove is formed on the lower surface of the outer moving body, the mounting is easy.

The inner moving body is a piston operated by fluid pressure, and the piston is provided with a piston end before and after the piston portion. From the piston portion, a force transmitting member projects outward through a slit and widens. The main body member of the outer moving body is formed, and the main body member has an annular shape in which the front, rear, left and right walls are continuous, and the piston portion, the force transmission member, and the main body member of the outer moving body are integrally formed as a single unit. It is good to be a member (claim 8) . In this case, the number of components is reduced as compared with the case where the front and rear wall members are separately attached to the front and rear walls of the left and right walls of the outer moving body, and the labor for assembling can be omitted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rodless cylinder 1 operated by a fluid (air) pressure will be described as an example of an actuator or a slide unit. In FIGS. 1, 2 and 3, a tube (cylinder tube) 2 formed by extruding or drawing a non-magnetic material (for example, aluminum alloy) has a non-circular (oblong) cylinder hole 2a, and has a longitudinal shape. A slit 3 is formed over the entire length in the direction. In the cylinder tube 2, in addition to the cylinder hole 2a and the slit 3 as viewed in cross section, a mounting groove 4 for mounting an end member (end cap) and a sensor mounting are formed on the outer surfaces of the left and right side walls in parallel with the cylinder hole 2a. A groove 5 is formed. The mounting groove 4 has a shape in which a part of a round hole is cut out.

Both longitudinal ends of the cylinder tube 2 are closed by end caps 10, which are formed as end members and project upward from the tube upper surface 2 b, to form a cylinder chamber 6 between the end caps 10, 10. are doing. In FIGS. 1 and 2, the end cap 10 and the cylinder tube 2 are fitted with the insertion shaft 12 of the end cap 10 into the end of the piston hole 2 a via the cylinder gasket 13. Screw 14 (for example, as defined in JIS (Japanese Industrial Standards) B-1122) which is fastened by forming a female screw into the end of the mounting groove 4 for mounting the end member. , Is connected to the end cap 10. With this coupling configuration, it is not necessary to form a female screw in advance at the end of the mounting groove 4 for mounting the end member, and the number of processing steps can be reduced.
The connection point by the tapping screw 14 is the end cap 1
In relation to the fluid supply / discharge port 15 formed on the side surface of the end cap 10, there are three places for the end cap 10.

The moving member 18 includes an inner moving body and an outer moving body 2.
6 and a force transmitting member 22 connecting the two. The cylinder chamber 6 is divided into front and rear cylinder chambers 6A and 6B by a piston 20 as an inner moving body having piston ends 21 at both longitudinal ends of a piston portion 20a. A force transmitting member (piston yoke) 22 that penetrates the slit 3 is formed integrally with the piston portion 20a. The force transmitting member 22 extends right and left outside the tube 2 and serves as a piston mount 23 as a main body member of the outer moving body 26. The piston mount 23 has an annular shape in which the front and rear walls 23c, 23d are continuous with the front and rear walls 23a, 23b in the width direction. Outer seal band 31 described later
Is formed in the seal band passage space 24 between the front wall 23c and the rear wall 23d via the upper portion of the force transmitting member 22. The lower surface of the piston mount 23 is formed in a scraper fitting step 25 over the entire circumference (FIG. 5), and the lower surface of the left and right walls 23a and 23b of the piston mount 23 is formed with a concave portion 25a at an intermediate longitudinal position. Together with the projection 48 of the guide member 40, it constitutes a positioning means for determining the length of the guide member. Force transmission member 22
The upper and lower surfaces 22a, 22b have a shape that bulges upward and downward, and front and rear portions thereof are inner and outer seal bands 30, 3, respectively.
1 are mounting portions 27, 27 to which band guides to be described later are mounted in a sandwiched state. The piston portion 20a, the force transmitting member 22, and the piston mount 23 are a single member as a whole. This single member is formed by aluminum die-casting, and the front and rear left and right walls 23 of the piston mount 23 are formed.
a to 23d are integrally formed continuously, so that the front and rear walls 23
Compared with the case where c and 23d are separately assembled, the number of parts can be reduced, and the trouble of assembling can be eliminated.

The guide members 40 attached to the front and rear of the force transmitting member 22 are made of a resin material having elasticity and high slidability, and bulge upward toward the inside in the longitudinal direction so as to guide the outer seal band 31. An arc is drawn so that the band guide 41a for the outer seal band 31 adapted to the width of the outer seal band 31 and an arc is formed so as to swell downward toward the inside of the longitudinal direction so as to guide the inner seal band 30. A band guide 41b for the inner seal band 30 adapted to the width of the seal band 30. A sliding member (sliding plate) 43 that slides on the outer surface (here, upper surface) 2b of the tube extends on both sides in the width direction to a position short of the step portion 25, and the band guide 41a stands upward from the upper surface. Has been raised. A slit sliding contact portion 45 that slides on the opposite wall of the slit 3 from slightly forward of the rising portion of the band guide 41a to the longitudinal inner end of the sliding member 43 is integrally formed below the center of the sliding member 43 in the width direction. The left and right side surfaces form a sliding contact surface 46 that slides on the inner wall of the slit 3. The band guide 41b falls downward from the slit sliding contact portion 45. An oil groove 44 in the width direction is provided on the lower surface (sliding surface) of the sliding member 43.
Are arranged in parallel in the longitudinal direction. Inside the slit sliding contact portion 45, the band guides 41a, 41b rise, and the force transmitting member 22 extends from the inner surface 42a of the fall wall to the rear portion.
There is formed a fitting groove 47 to be fitted in. Sliding member 4
A projection 48 is provided on the longitudinal inner end of 3 in the upper part. The guide member 40 elastically fits the fitting groove 47 into the force transmitting member 22 and resiliently connects the upper and lower band guides 41a, 41b to the front and rear mounting portions 27, 27 of the force transmitting member 22 so as to sandwich the upper and lower portions. Opening, fitting, launching,
When the inner surface 42a of the falling wall is in contact with the front surface 27a of the mounting portion 27, the projection 48 just hooks on the recess 25a of the piston mount 23, and the pair of upper and lower band guides 41a, 41b is provided. The state in which the protrusion 48 is locked in the recess 25a by the force in the axial direction generated by the force of closing by the elasticity of itself is maintained,
Thus, the one-touch detachable quick engaging means 49 which holds the longitudinal position and the vertical direction of the guide member 40 is constituted.

The sliding member 43 and the band guides 41a, 41
In the structure of this embodiment in which b is integrated and the slit sliding contact portion 45 is also integrally formed, the number of parts is smaller than that of a conventional structure in which these are separately provided, and
The assembly man-hour is greatly reduced. Further, since they can be attached to and detached from the moving member 18 with one touch, there is no need for assembling with screws or other fixing means, and when the guide member 40 is assembled to the moving member 18, even if the moving member 18 is directed downward, the guide is Since the member 40 does not come off from the moving member 18 naturally, it is easier to assemble the moving member 18 into the tube 2.

The sliding member 4 is provided between the upper surface of the sliding member 43 of the guide member 40 and the lower surface of the piston mount 23.
A shim (adjustment member) 55 for adjusting the sliding state of the third member 3 with respect to the tube upper surface 2 b is interposed between the two front and rear sliding members 43. The shim 55 has a notch 56 having a size corresponding to the recess 25 a of the piston mount 23, and is engaged with the projection 48 fitted into the recess 25 a when the guide member 40 is attached to the force transmitting member 22. ,
The widthwise inner end of the band guide 41a is in contact with the side surface of the rising wall of the band guide 41a, and positioning in the width direction and the axial direction is performed. The shims 55 having different thicknesses are prepared in advance, and the one having the best sliding state is selected from these when assembling. Sliding member 4 with shim 55 interposed
In this structure for adjusting the sliding state of the third member 3 with respect to the tube upper surface 2b, there is no need for an adjusting means such as a screw or the like, which eliminates the need for screw hole processing and contributes to a reduction in assembly labor. Thus, the shim 55 and the sliding member 43 of the guide member 40 are provided between the lower surface of the piston mount 23 and the upper surface 2b of the tube.
The front and rear walls 23 of the piston mount 23
c, a gap Q between the lower surface of 23d and the tube outer surface 2b.
Is formed, and forms a release operation portion 57 when an engaging and disengaging claw of the band cover 60 described later is externally operated.

The band cover 60 has elasticity and
A resin material with good slidability (plastic material, such as polybutylene terephthalate or polyacetal)
It is molded from. As shown in FIG. 10, the front and rear sides of the top plate portion 61 having a size just fitted into the band passage space 24 are formed as arm portions 62 which hang downward, and the ends thereof are bent outward in a hook shape. , The engaging claws 63. The lower surface of the engaging / removing claw 63 is formed on the guide surface 64 of the outer seal band 31. Side walls 65 are hung right and left in the width direction of the top plate 61 (FIGS. 2 and 3), and the inner width of the side walls 65 is set slightly larger than the width of the outer seal band 31. Band guide 4 for band 31
The width of 1a is a width that fits between the side walls 65. A plurality of ribs 66 are provided in the width direction between the side wall portions 65, 65, and the lower surface of the rib 66 is provided on an upwardly concave guide surface 67 that guides the outer surface of the outer seal band 31. Opposing inner surfaces of the side wall portions 65, 65 are formed on guide surfaces 68 at the widthwise end surfaces of the outer seal band 31, respectively. A predetermined gap 69 is provided between the arm 62 and the longitudinal end of the side wall 65 so that the engaging and disengaging claw 63 is easily bent inward. The above cannot be bent inward. This prevents breakage due to excessive pushing of the engaging and disengaging claws 63. The lower surface of the front and rear walls 23c and 23d of the piston mount 23 of the outer moving body 26 is formed in a locking portion 70 which is engaged with and disengaged from the engaging and disengaging claw 63.
The front and rear walls 23c and 23d are locked at the gap Q formed between the lower surface and the tube upper surface 2b.

A double lip scraper 75 extends from the lower side of the step 25 for mounting the scraper around the sliding member 43 of the pair of guide members 40 and the outer periphery of the shim 55 so as to expose the outer peripheral surface to the outside. It is fitted. Scraper 7
In the structure of the present application in which the outer surface of the slide unit 5 is barely mounted over the entire circumference, by coloring the entire scraper 75, the color can be utilized in the appearance design of the slide unit.
A plurality of wide positioning projections 76 project inward at the longitudinal middle of both sides in the width direction of the scraper 75 (FIG. 4).
No. 7 engages with correspondingly shaped notches 77 provided on both sides in the width direction of the sliding member 43, and together with the notches 77, together with the scraper 7.
An engaging means 71 is provided for positioning the front and rear directions 5 and preventing them from coming off in the width direction. Protrusion 76
The notch 77 and the notch 77 may be provided on a member opposite to the above. When the disengagement pawl 63 is disengaged from the engaging portions 70 on the lower surfaces of the front and rear walls 23c and 23d of the piston mount 23 at positions corresponding to the disengagement pawls 63 on the inner lip 75a of the front and rear portions of the scraper 75. Release notch 78 that allows the entry of the tool 100 into the notch 78 is formed.

The inner and outer seal bands 30 and 31 for closing the slit 3 from the inside and the outside pass through the upper and lower portions of the force transmitting member 22 and reach both end caps 10 at both ends. The inner and outer seal bands 30, 31 are thin flexible bands, and are made of a magnetic material such as a steel band. The inner and outer seal bands 30, 31 have a width larger than the width of the slit 3, as is well known. Seal band 3
The longitudinal ends of 0 and 31 are attached to the end cap 10 by fitting the attachment pins 39 into the pin holes 38. The mounting pin 39 is covered with a cover member 79 which is detachable from the end cap 10 and is prevented from falling off.

Magnets 80 for attracting the inner and outer seal bands 30 and 31 are arranged on both sides of the slit 3 along the length. Except for the part passing through the force transmitting member 22, the inner seal band 30 closes the slit 3 from the inside by the magnetic attraction force of the magnet 80 and the fluid pressure applied to the cylinder chamber 6, and the outer seal band 31 The slit 3 is closed from the outside by the magnetic attraction force. Fluid from the supply / discharge port 15 provided on the side surface of the end cap 10 is supplied to the corresponding cylinder chambers 6A, 6B via the supply / discharge hole 81 of the end cap 10 and the supply / discharge hole 83 provided at the center of the internal damper 82. The piston 20, that is, the outer moving body 26 moves left and right. The internal damper 82 abuts on the end of the piston 20 at the piston stroke end to absorb a shock. Also, 84
Is an external damper which is in contact with the piston mount 23 and absorbs its inertial energy.

The band cover 60 is attached to the piston mount 23.
When the band cover 60 is fitted into the band passage space 24 of the piston mount 23 from outside, the distal ends of the front and rear engaging and disengaging claws 63 are pushed by the inner side surfaces of the front and rear walls 23c and 23d, and are bent inward. When pushed in, side wall 65
The lower surface contacts the apex of the upper surface 22a of the force transmission member 22 to restrict downward movement (FIG. 3). At this time, the just-bent engagement / disengagement claws 63 return outward by elasticity, and the front and rear wall lower surfaces 23c, 23d (see FIG. 10).
(A)). When the band cover 60 is attached in this manner, the lower surface of the engaging and disengaging claw 63 is simultaneously
Since the number is 4, there is no need for assembling this as compared with a conventional device provided separately. Also, when removing the band cover 60, as shown in FIG.
When a thin tool such as 0 is lifted from the center of the piston mount 23 in the width direction and the outer lip 75b of the front and rear portions of the scraper 75 is pushed in, the tool passes through the notch 78 for releasing operation of the inner lip 75a. And disengage nail 6
3 can be pushed inward, so that the engaging claws 63
The band cover 60 can be easily removed from the piston mount 23 by removing the band cover 60 from the locking portion 70.

When the fluid is supplied and discharged from the supply and discharge ports 15 of the front and rear end caps 10 and 10, the piston mount 23 moves while the inner and outer seal bands 30 and 31 close the slit 3. The outer seal band 31 does not come into contact with the outer moving body 26 (the inner surface of each wall of the piston mount 23) at its outer surface and the widthwise end surface by the band cover 60. The inner surface of the seal band 30 (the surface facing the outer seal band 31) is formed by upper and lower band guides 41 a and 41 b before and after the force transmitting member 22.
There is no direct contact with itself. Therefore, when the force transmission member 22 and the piston mount 23 are made of metal, the generation of wear powder from their surfaces is eliminated, and the wear powder does not adhere to the inner and outer seal bands 30 and 31, so that the sealing function is stabilized. The life of the inner and outer seal bands 30, 31 can be extended. When the piston mount 23 moves, the double lip scraper 75 closes the gap between the lower surface of the piston mount 23 and the tube outer surface 2b.
0, 31 to prevent dust from adhering to the sealing surface,
Keep the movement of 8 smooth.

The load applied to the piston mount 23 perpendicular to the slit 3 is applied as it is to the tube outer surface 2b via the shim 55 and the sliding member 43 as a vertical load. Therefore, the piston 20 is not pressed against the inner periphery of the piston hole 2a, and the movement does not deteriorate. When a moment M1 in the width direction is applied to the piston mount 23, as shown in FIG. 11, the entire moving member 18 slides with the shim 55 at a position separated from the force transmitting member 22 in the direction of action of the bending moment. Also applied as a vertical load F1 on the outer surface of the tube via the moving member 43,
By using the load portion as a fulcrum, not the bending stress but the tensile stress due to the tensile force F2 is generated on the weakest force transmitting member 22, so that the bending moment is directly bent by the force transmitting member 22. The strength of the force transmitting member 22 can be increased as compared with the case where the structure is loaded as a force. The same effect is obtained when a bending moment M2 in the front-rear direction is applied (FIG. 9).

[0027]

As described above, according to the present invention, the band cover of the outer moving body can be attached with one touch, and the band cover can be detached very easily by operating from the outside of the outer moving body. This makes it extremely easy to attach and detach the outer moving body to and from the main body, thereby facilitating assembly and disassembly and maintenance work.

Further, since the lower surface of the engaging / disengaging claw of the band cover is used as the guide surface of the outer seal band, the guide surface of the outer seal band can be provided on the outer movable body by the work of mounting the band cover. The number of parts can be reduced and the assembling time can be shortened as compared with the case of providing.

When the outer seal band is provided with a guide surface in the width direction and an outer surface on the inner side of the band cover, the outer seal band is positioned on the upper surface when relatively moving in the band passing space of the outer moving body. When the outer moving body is metallic, the generation of abrasion powder from the outer moving body is eliminated, the sealing function is improved, and the outer seal band has a longer life, since the end surface in the width direction does not contact the outer moving body. Can be.

A release lip notch is formed at a position corresponding to a locking portion of an inner lip of a double lip scraper attached to a lower portion of a main body member of an outer moving body.
When the band cover is removed, the release operation is not hindered by the inner lip, even if the band cover is a double lip and has a high dustproof function.

Since the scraper is made visible from the outside, the coloring of the scraper can be utilized in the design, and since the scraper is not fitted into the long groove, it can be easily mounted.

Since the main body member of the outer moving body is formed in an annular shape in which the front, rear, left and right walls are continuous, and the force transmitting member of the piston and the main body member of the outer moving body are integrally formed into a single member as a whole. In contrast, the number of components is reduced as compared to the case where front and rear wall members are separately attached to the front and rear walls of the main body member of the outer moving body, and the labor for assembling can be saved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rodless cylinder.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is an exploded perspective view showing a moving member, a guide member, and a shim.

FIG. 5 is a side view of a single member including a piston portion, a force transmitting member, and a force transmitting member.

FIG. 6 is a side view of the guide member.

FIG. 7 is a plan view of FIG. 6;

FIG. 8 is a front view of FIG. 6;

FIG. 9 is a side view showing a state where a guide member and a shim are attached to a single member.

FIG. 10 is a diagram showing a locked state of the band cover and a state at the time of unlocking.

FIG. 11 is an explanatory diagram when a bending moment acts in the width direction.

FIG. 12 is an overall perspective view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rodless cylinder (slide unit) 2 Tube 3 Slit 20 Piston (Inner moving body) 21 Piston end 22 Force transmitting member 23 Piston mount (Main body member of outer moving body) 23a Left wall 23b Right wall 23c Front wall 23d Rear wall 24 Seal band passage space 25 Scraper fitting step 26 Outer moving body 30 Inner seal band 31 Outer seal band 57 Release operation part 60 Band cover 63 Engagement claw 64 Guide surface 67 Guide surface on outer surface of outer seal band 68 Outer seal Guide band width direction guide 70 Locking portion 71 Engagement means 75 Scraper 75a Inner lip 78 Notch for release operation

Claims (8)

(57) [Claims] 1. A movement of an inner moving body inside a tube is transmitted to an outer moving body outside the tube through a longitudinal slit provided in the tube, and the outer seal band penetrates the outer moving body. closing the slit, the outer mobile, body member and the outer sheet - in a slide unit and a band cover for covering the Rubando, body member of the outer moving body
Is a seal bar at the center of which the outer seal band passes.
And has a ring passage space, and is attached so as to cover the body member and the seal band passage space of the outer moving body.
Elastic deformation provided on the band cover and a band cover for
Formed on the lower part of the front and rear walls of the body
The engaging and disengaging claw is provided so as to be freely disengageable by elastic engaging and disengaging means comprising a detachable engaging portion, and the lower surface of the main body member and the
A predetermined gap is formed between the facing tube outer surface and the
A slide unit characterized in that it is a release operation part for releasing the locking state of the engaging and disengaging claw of the band cover with respect to the stop part from the outside of the outside moving body. 2. The lower surface of the engaging and disengaging claw is attached to the outer surface of the outer seal band.
The slide unit according to claim 1, wherein the slide unit is a guide surface . 3. An outer seal ban is provided inside the band cover.
The slide unit according to claim 2, wherein a guide surface in a width direction of the slider and a guide surface on an outer surface are provided . 4. The band cover is formed by resin molding.
The slide unit according to any one of claims 1 to 3 . 5. The entire periphery of a lower part of the body member of the outer moving body.
Between the lower surface of the main body member of the outer moving body and the outer surface of the tube.
Equipped with a double lip scraper that closes the gap, of which
The side lip has a release operation at a position corresponding to the locking portion.
An action notch is formed.
4. The slide unit according to any one of 3 . 6. The scraper has an outer surface exposed to the outside.
6. The slide unit according to claim 5, wherein the slide unit is mounted so as to protrude . 7. An annular screw provided on a lower surface of an outer moving body.
Insert the annular scraper into the stepper
Between the Repa and the outer moving body side, it fits together
Providing engagement means to prevent the scraper from coming off
The slide unit according to claim 6, wherein the slide unit comprises: 8. A piston whose inner moving body is operated by fluid pressure.
And the piston is located before and after the piston part.
And a force transmission member from the piston
It protrudes outward through the slit, widens, and
A main body member is formed.
It has an annular shape, the piston part, the force transmission member and the outside
The main body member of the moving body is integrally molded and a single part as a whole
The material according to any one of claims 1 to 7, which is a material.
The slide unit according to claim 1 .