JPH0674801B2 - Rotless dress cylinder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rodless cylinder, more specifically, a piston is fitted in a cylinder barrel having a slit in the axial direction, and a connecting portion provided on the piston is provided with the slit. And a mount connected to the connecting portion, and the slit is sealed by a seal band.

2. Description of the Related Art As a conventional rodless cylinder of this type, Japanese Patent Laid-Open No.
No. 290214, a linear motion bearing is arranged on each side surface of a cylinder barrel, and an axial T groove is formed on the upper surface of the cylinder barrel, and the guide is guided by these linear motion bearings. The mount is provided with a portion, and the stopper block is fixed to the end of the cylinder barrel by the fitting detected in the T groove.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned conventional rodless cylinder, a T groove for mounting a position detecting switch in the axial direction is formed on the upper surface of the cylinder barrel separately from the linear motion bearing, and the T groove is formed in the T groove. Since the stopper block is fixed to the cylinder barrel by the locked fixture, the strength of the upper wall of the cylinder barrel is weakened, and the deformation of the cylinder barrel becomes large when the working pressure of the piston is increased, and the position detection is performed. Since the T-groove for mounting the switch is used to fix the stopper block, the cross-sectional shape of the T-groove has to be extremely large enough to fix the stopper block.
As a result, the wall thickness of the cylinder barrel was increased, which was not preferable.

Means for Solving the Problems In order to solve the above problems, the present invention provides guide grooves parallel to the axis on the wall surfaces on both sides of a slit of a cylinder barrel, and the mount is guided by the guide grooves. Guide portion is provided, the mounting bracket is placed on the upper surface of the cylinder barrel when the slit is directed upward, and the fastening body fitted in the guide groove is tightened on the lower surface of the mounting bracket to fix the mounting bracket. It is characterized in that a stopper or a shock absorber is attached to the mounting bracket.

Action When the piston in the cylinder barrel is moved, the mount outside the cylinder barrel is guided straight by the guide groove of the cylinder barrel in the axial direction and smoothly moved. The movement of the mount is stopped by contacting a stopper or a shock absorber at an arbitrary position. Since the stopper or shock absorber is mounted on the mounting bracket fixed using the guide groove for mounting guide on the side surface of the cylinder barrel, it is not necessary to provide the groove for mounting the stopper or shock absorber on the upper wall of the cylinder barrel. .
Also, since the mounting bracket is mounted by tightening the fastening body fitted in the guide groove on the lower surface of the mounting bracket placed on the upper surface of the cylinder barrel, the mounting bracket can be securely mounted without deforming the side wall of the cylinder barrel. Can be fixed.

Embodiment In the drawings, reference numeral 1 is a cylinder barrel made of a non-magnetic material such as an aluminum material, which has a substantially rectangular cross section. In this cylinder barrel 1, 2 is a sliding hole,
3 is a slit formed on the upper wall, which is formed over the entire length in the axial direction.

Next, 4 is an end cap fixed to both ends of the cylinder barrel 1 by mounting bolts 5, respectively, and has supply / discharge holes 6 for supplying / discharging compressed air. Reference numeral 7 denotes an inner seal band for closing the slit 3, which is made of a magnetic material and has a width larger than the slit width. The end portion of the seal band 7 is inserted into the insertion hole 8 of the end cap 4 and is fixed to the stop plate 10 which is fixed by the mounting screw 9.
Is fastened to.

An outer seal band 12 is made of a magnetic material and has a width larger than the slit width. That seal band
The end portion of 12 is fixed to the end cap 4 by a mounting screw 9 for fixing the stop plate 10 via a push plate 10a. 8
As shown in FIG. 3, reference numeral 0 denotes a magnetic band made of a permanent magnet, which is embedded in the upper surface 1a of the cylinder barrel 1 on both sides of the slit 3 so as to attract both edges of the seal bands 7 and 12. .

Next, 13 is a piston slidably fitted in the sliding hole 2 and is provided with annular grooves 14 around both ends 13a, respectively, and piston packings 15 made of an elastic material are fitted in these annular grooves 14. It is worn. These piston packings 15 are arranged with an appropriate interval L in the axial direction. The intermediate portion 13b of the piston 13 is formed in a U-shaped cross section by forming a groove 17 on the lower side, and the seal band 7 is inserted into the groove 17. A connecting portion 16 is integrally formed on the outer circumference of the intermediate portion 13b. The connecting portion 16 is a neck portion penetrating the outer body 18 and the slit 3 located outside the cylinder barrel 1.
It is composed of 19 and. Piston packing for outer body 18
There is a connecting hole 21 in a direction orthogonal to the moving direction of the piston 13 at a position corresponding to the center portion between 15 and 15, and the connecting hole 21
Bush 22 is fitted in 21. A groove 18a is formed on the upper surface of the outer body 18, and the seal van 12 is fitted into the groove 18a. Two magnets 20 are embedded in the intermediate portion 13b, and the magnets 20 constitute an object to be operated for actuating a position detection switch described later.

Next, 23 is a guide rail provided on the upper surfaces 1a of the side walls on both sides of the slit 3 of the cylinder barrel 1 with the slit 3 of the cylinder barrel 1 facing upward. It is set up. The guide rail 23
The upper surface 25a of the wear-resistant band 25 such as a stainless steel band adhered to the groove 24 formed in the upper surface 1a. The wear-resistant band 25 is located above the center of the side wall of the cylinder barrel 1 as shown in FIG. 3, and its upper surface 25a is parallel to the slit width direction (left and right direction in FIG. 3) and of the cylinder barrel 1. It is formed substantially flush with the upper surface 1a. The guide rail 23 may be composed of the upper surface 1a of the cylinder barrel 1 itself which has been subjected to hard alumite treatment.

Next, 26 is the cylinder barrel 1 on both sides of the slit 3.
The guide rails are respectively provided on the upper portions of the side faces 1b of the above, and are arranged over the entire length in the axial direction. The guide rail 26 is constituted by an upper slope 27a of a substantially V-shaped guide groove 27 formed on the side surface 1b. The upper inclined surface 27a is formed as a downward inclined surface toward the center side of the cylinder barrel 1, and its inclination angle is inclined by about 30 degrees downward with respect to the slit width direction which is horizontal when the slit 3 is directed upward. It is set to an angle. The guide rail 26 is the cylinder barrel 1.
It may be configured by a linear rolling guide attached to the side surface 1b of the. Also, the inclination angle may be changed as appropriate.

28 is a side surface of the cylinder barrel 1 on both sides of the slit 3.
Mounting grooves provided in the lower part of 1b are formed over the entire length in the axial direction. As shown in FIG. 4, a detecting portion 29a of a support 29 is engaged with the mounting groove 28 at an arbitrary position, and the support 29 is fastened to a member to be mounted by a mounting bolt 30 so that the cylinder barrel 1 can be fixed. It can be fixed to a member to be attached. Denoted at 31 are locking grooves provided on both sides of the slit 3 in the middle portion of the side surface 1b of the cylinder barrel 1 and are formed over the entire length in the axial direction. As shown in FIG. 4, the locking groove 31 is engaged with the locking portion 33a of the mounting member 33 of the position detecting switch 32 at an arbitrary position, and the mounting screw 34 is tightened to move the position detecting switch 32 to the cylinder barrel 1. It can be fixed to.

Next, 34 is a mount connected to the outer body 18 of the connecting portion 16. In the mount 34, 35 is a mount body, which is formed in a substantially U-shaped cross section and is positioned so as to cover the upper portion of the cylinder barrel 1. In the mount body 35, 36 is a mount base located above the cylinder barrel 1, and a mounting screw hole 81 for mounting a movable body is provided on the upper surface. A groove 37 is formed on the lower surface of the mount base 36, and the outer body 18 is fitted into the groove 37. A connecting pin 38 that crosses the groove 37 is fixed to the mount base 36 at the center of the length in the moving direction by a screw 39, and the connecting pin 38 is inserted into the hole of the bush 22 with a gap. The connecting pin 38 has a cutout 38 on the upper side and a cutout 38 on the lower side.
The width a is formed by forming a width across flats, and the gap between the connecting pin 38 and the bush 22 in the direction orthogonal to the piston moving direction is slightly larger than the gap in the piston moving direction.

Further, in the mount main body 35, 40 and 41 are a pair of holding pieces positioned on the side of the cylinder barrel 1 and integrally project downward from both sides of the mount base 36. As shown in FIG. 3, one holding piece 40 is configured to be elastically deformable in the left-right direction by providing a stepped groove 36a on the side surface of the mount base 36 and forming a thin connecting portion 40a. There is. The holding piece 40 may be elastically deformable by making a notch from the inside of the mount body 35 as shown in FIG.

Next, 42 is a guide portion provided on the lower surface of the mount base 36, and a pair of guide portions are provided so as to be guided by the guide rail 23. When the mount body 35 is made of an aluminum material, the guide portion 42 is made of a metal sheet 43 such as an oil-impregnated sintered metal, and is suitable for a relatively low speed and a high load.
Incidentally, the guide portion 42, when the mount body 35 is made of steel material and the hardness of the portion is increased by quenching or the like, or when the mount body 35 is made of aluminum material and the portion thereof is made of stainless steel or the like. When the abrasion resistant band is attached, it is preferable to use needle rollers made of alloy steel or needle rollers with a flat cage. When the guide rail 23 is formed on the upper surface of the cylinder barrel 1 itself, the guide portion 42 may be formed of a plastic sheet such as polyacetal resin or a sheet of steel plate to which copper alloy and polyacetal resin are attached, which is relatively high speed. Suitable for low loads.

Reference numerals 44 and 45 are guide portions provided on the holding pieces 40 and 41, and are made of a plastic material such as polyacetal resin that is rotatably fitted in concave grooves 46 formed inside the holding pieces 40 and 41, respectively. It is composed of a guide body 47. The guide surface 47a of each guide body 47 is slidable on the guide rail 26 by bringing a plurality of adjusting screws 48 screwed onto the side surface of the mount base 36 into contact with the contact portion 40b of the holding piece 40. Being closely.
The clearance between the guide surface 47a and the guide rail is about 0.05 mm to about 0.1.
It is adjusted to about mm. Guide body 47, 47 is the mount body
The stopper plates 50, 51 are secured to the opposite end surfaces of the member 35 by mounting bolts 49, respectively, and are secured by stoppers 50a, 51a.
The holding pieces 40 and 41 are arranged at positions in which a predetermined amount H is inserted inward from the positions of the piston packings 15 and 15, respectively. The predetermined amount H is, for example, about 15 when the cylinder hole diameter is 25 mm.
mm, about 20 mm when the cylinder hole diameter is 40 mm, and preferably about 10 mm or more because the influence of deformation of the cylinder barrel 1 during operation can be reduced.

Next, 52 is a seal band plate provided at each end of the mount 34, which includes the mount body 35 and the holding plates 50, 51.
It is sandwiched between them, and the central portion of the lower part thereof is in sliding contact with the upper surface of the seal band 12. The seal band plate 52 is made of a plastic material such as polyacetal resin. Further, 53 is a substantially U-shaped scraper arranged in parallel on the outside of the seal band plate 52, which is a mount body.
It is sandwiched between 35 and the pressing plates 50 and 51 via a seal band plate 52, and the lower portions thereof are in sliding contact with the upper faces of the seal band 12, the guide rail 23 and the cylinder barrel 1 and the inner face of the guide groove 27, respectively. . The scraper 53 is made of an elastic material such as rubber. Reference numeral 54 is a grease nipple provided outside the holding pieces 40, 41, and 55 is an oil supply hole for supplying oil to a space formed between the upper surface of the cylinder barrel 1 and the lower surface of the mount 34.

Next, as shown in FIG. 6, 57 are mounting brackets for supporting stoppers, which will be described later, and are fixed to both ends of the cylinder barrel 1, respectively. An axial mounting screw hole 58 is formed in the mounting bracket 57, and an axial mounting screw hole 58 is formed in the bracket 57, and a male screw 59a of a stopper 59 made of a screw body is screwed into the female screw 58a of the mounting screw hole 58. Has been done. Further, a slit groove 60 is formed in the mounting bracket 57 between the mounting screw hole 58 and one side surface, and the wall 57a above the slit groove 60 is elastically deformed vertically. Further, vertical insertion holes 61 are formed at both ends of the mounting bracket 57, and one insertion hole 61 crosses the slit groove 60. Mounting bolts 62 are inserted into both the insertion holes 61, and screw holes 63a provided in the fastening body 63 are screwed into the tip ends of the mounting bolts 62. Engaging portion 63b of the fastening body 63
Is fitted at an arbitrary position of the guide groove 27, and by tightening the mounting bolt 62 at that position, the engaging portion 63b is fitted between the guide groove 27 of the cylinder barrel 1 and the upper surface of the mounting bracket 57.
The overhanging portion 64 between 1a is clamped and fixed, and the mounting screw hole
58 holds the stopper 59 in place. 65 is a screw hole provided in the wall 57a above the slit groove 60, 66 is an open screw screwed into the screw hole 65, the tip of which is in contact with the wall 57b below the slit groove 60. By making contact with each other, the slit groove 60 can be enlarged.

In the above structure, when compressed air is supplied from one of the supply / discharge holes 6 to the cylinder chamber in the cylinder barrel 1, the air pressure of the compressed air acts on the end surface of the piston 13 to push and move the piston 13. Let The mount 34 is also moved by the movement of the piston 1 via the connecting portion 16 and the connecting pin 38. In the mount 34, the guide portions 42, 42 are axially guided by the guide rails 23, 23 of the cylinder barrel 1, and the guide portions 44, 45 are axially guided by the guide rails 26, 26 of the cylinder barrel 1, respectively. Moved straight and stable.

When the mount 34 is moved as described above, the scraper 53 slides on the outer surfaces of the seal band 12, the guide rails 23, 23 and the cylinder barrel 1 and the inner surface of the guide groove 27 to clean the surfaces thereof. And seal band plate 52
Slides on the upper surface of the outer seal band 12
Firmly adhere 12 to magnetic band 80. The mount 34
When moved to the moving end, it comes into contact with the stopper 59 and is stopped. In that case, the stopper 59 is clamped and fixed in the mounting screw hole 58 of the mounting bracket 57 by tightening the mounting bolt 62, and the mounting bracket 57 is clamped and fixed in the protruding portion 64 of the cylinder barrel 1 by the mounting bolt 62. Since the stopper 59 can prevent the position of the stopper 59 from being displaced due to a shock or the like, the mount 34 can be reliably stopped at the correct position by the stopper 59. When the piston 13 is moved to a predetermined position, the magnet 20 as the detected body operates the position detection switch 32.

Next, when a large downward load is applied to the upper surface of the mount 34 in a use state in which the cylinder barrel 1 is arranged with the slit 3 facing upward, the load is applied to the guide portions 42, 42.
Is guided by the guide rails 23, 23 of the cylinder barrel 1 to be supported by the guide rails 23, 23. Since the upper surfaces 25a of the guide rails 23, 23 are formed parallel to the slit width direction, the guide rails 23, 23 apply the load through the guide portions 42, 42 at a substantially right angle to the slit width direction. It receives only by the force of the direction. Therefore, the load acts on the both side walls of the cylinder barrel 1 only as a compressive force in the substantially vertical direction, the bending stress in the slit width direction hardly acts, and the deformation amount of the both side walls in the slit width direction becomes extremely small. As a result, the mount 34 can be moved smoothly.

Further, when a large lateral bending moment in the right direction acts on the mount 34, for example, in FIG.
44 pushes the guide rail 26, and the right guide portion 42 pushes the guide rail 23. When the left guide portion 44 pushes the guide rail 26, the upper slope 27a of the guide rail 26 is inclined downward by approximately 30 degrees with respect to the horizontal direction which is the slit width direction. The force of 44 is received by the force in the upward direction and the force in the right direction (slit width direction) smaller than the force, and the left side wall is slightly deformed inward. When the guide section 42 on the right side pushes the guide rail 23, the guide rail 23
Since the upper surface 25a of the guide rail 23 is formed parallel to the slit width direction, the guide rail 23 receives the force of the guide portion 42 by the downward force (direction substantially perpendicular to the slit width direction), and the right side wall is It receives almost no bending stress in the slit width direction and does not deform inward. Therefore, even when a large lateral bending moment acts on the mount 34, the amount of deformation of the side walls in the slit width direction becomes extremely small, and the mount 34 can be moved smoothly.

Next, if you want to change the stop position of the mount 34, that is, the moving stroke greatly, loosen the mounting bolt 62 and tighten the fastening body 63.
The clamping of the overhanging portion 64 due to is released, in that state the mounting bracket 57 is moved in the axial direction to move the tightening body 63 to the desired position in the guide groove 27, and the mounting bolt 62 is tightened again at that position. To fix the mounting bracket 57 to the cylinder barrel 1. Further, when it is desired to slightly change the stop position of the mount 34, that is, the moving stroke, by tightening the release screw 66 with the mounting bolt 62 loosened, the release screw 66 is released.
The tip end of the cutting groove 60 is brought into contact with the wall 57b below the cutting groove 60, whereby the cutting groove 60 is enlarged to form the female screw 58a of the mounting screw hole 58.
The bite between the male screw 59a and the male screw 59a is released. After that, rotate the stopper 59 to change the screwing position with the mounting screw hole 58,
In that state, loosen the opening screw 66 again and attach the mounting bolt 62.
Tighten and fix the stopper 59 by pinching.

FIG. 7 shows a different embodiment of the present application, in which the body 71 of the shock absorber 70 is screwed into the mounting screw hole 58e of the mounting bracket 57e instead of the stopper, and is mounted by the plunger 72 of the shock absorber 70. The mount is stopped by the main body 71 after receiving the shock and absorbing the shock. It should be noted that the same components as those in the above-described embodiment are designated by the same reference numerals and the letter e is added to omit the emphasis. Also in the next embodiment, the letter f is similarly attached to omit the emphasis description.

FIGS. 8 and 9 show another different embodiment of the present invention, in which the wall 57af above the slit groove 60f of the mounting bracket 57f.
Of the two mounting bolts, one of the two mounting bolts 62af tightens only the wall 57bf on the lower side of the split groove 60f side to the cylinder barrel 1f, and the other mounting bolt 62bf on the upper and lower sides. The walls 57af and 57af are fastened to the cylinder barrel 1f. Therefore, when finely adjusting the stopper 59f, it can be easily adjusted by loosening only the mounting bolt 62bf.

In the present application, any guide groove may be provided on the side surface of the cylinder barrel, and the guide rail on the top surface may be omitted.

EFFECTS OF THE INVENTION As described above, in the present invention, since the guide groove parallel to the axis is provided on the lateral surface of the cylinder barrel and the guide portion guided by the guide groove is provided on the mount, the movement of the mount can be facilitated. At the same time, the life of the piston can be extended. Also, the mounting bracket is fixed to the cylinder barrel in a positionally adjustable manner, and the stopper or shock absorber is attached to the mounting bracket, so the movement of the mount can be stopped at any position by the stopper or shock absorber. It is possible to deal with various strokes only by adjusting the mounting position of the bracket. In addition, the stopper or shock absorber is fixed to the mounting bracket fixed using the guide groove for mounting guide on the side of the cylinder barrel, so a groove for mounting the stopper or shock absorber is required on the upper wall of the cylinder barrel. Instead, even if the stopper or the shock absorber is provided, the strength of the upper wall of the cylinder barrel can be increased. Also, since the mounting bracket is mounted by tightening the fastening body fitted in the guide groove on the lower surface of the mounting bracket placed on the upper surface of the cylinder barrel, the mounting bracket can be securely attached without deforming the side wall of the cylinder barrel. Can be fixed to.

[Brief description of drawings]

The drawings show the embodiments of the present application. FIG. 1 is a side view showing a partial cross section, FIG. 2 is a plan view of FIG. 1, and FIG.
III-III line enlarged sectional view, FIG. 4 is IV-IV line sectional view, 5th
FIG. 6 is a sectional view taken along line VV, FIG. 6 is a sectional view taken along line VI-VI, FIG. 7 is a sectional view showing another embodiment, FIG. 8 is a side view showing another different embodiment, and FIG. It is a top view of FIG. 1 ... Cylinder barrel, 3 ... Slit, 7, 12 ... Seal band, 13 ... Piston, 16 ... Connection part, 27 ... Guide groove, 34 ... Mount, 44, 45 ... Guide part, 57 ...... Mounting bracket, 59 …… Stopper, 63 …… Tightening body

Claims (3)

[Claims] 1. A piston is fitted in a cylinder barrel having a slit in the axial direction, a connecting portion provided on the piston is projected to the outside from the slit, a mount is connected to the connecting portion, and the slit is sealed. In a rodless cylinder hermetically sealed by a band, guide grooves parallel to the axis are provided on the side walls on both sides of the slit of the cylinder barrel, and a guide portion guided by the guide groove is provided on the mount, and the slit faces upward. The mounting bracket is placed on the upper surface of the cylinder barrel and the mounting bracket is fixed to the lower surface of the mounting bracket by tightening the fastening body fitted in the guide groove, and the stopper or shock absorber is mounted on the mounting bracket. A rodless cylinder characterized in that 2. A mounting bracket is provided with an axial mounting screw hole, and a slit groove is provided between the mounting screw hole and one side surface, and a stopper or a shock absorber is screwed into the mounting screw hole to mount the mounting bracket. The bracket has an insertion hole that traverses the slit, the mounting bolt is inserted into the insertion hole, the fastening body is fastened to the cylinder barrel by the mounting bolt, and the stopper or shock absorber is fastened to the mounting bracket. The rodless cylinder according to claim 1, wherein 3. An opening screw capable of enlarging the slit groove is provided on at least one wall of the lower portion above the slit groove of the mounting bracket.
Rodless cylinder according to item.