JP2001165116A - Dust-proofing rodless cylinder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dust or the like from invading into a cylinder body through a slit. SOLUTION: This device is equipped with a driving part 9c having a slit 5 on a tubular cylinder body in the axial direction, for reciprocating on the outside surface of the cylinder body along the slit, and has a rodless cylinder 2 equipped with seal bands (10a, 10b) for sealing the slit, and an opening 31a for insertion of the rodless cylinder, and has a box-shaped case member 3 where the rodless cylinder is stored through the opening, one or more rows of guide rails 33 projected in parallel with the axial direction of the cylinder body on the inner surface of a wall of the case member opposite to the slit, and one or more guide members 13 guided by the guide rails and stuck on the driving part, to thereby prevent the dust or the like from invading into the cylinder body through the seal bands from the slit during the operation of the rodless cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof rodless cylinder device which prevents intrusion of dust and the like.

[0002]

2. Description of the Related Art Conventionally, band type rodless cylinders have been disclosed as pneumatic cylinders (for example, Japanese Utility Model Laid-Open No. 3-23207, Japanese Patent Application No. 10-164860).
issue).

As shown in FIG. 9, a rodless cylinder 80 includes a tubular cylinder body 81 having a slit 81a in an axial direction, end covers 82a and 82b attached to both ends of the cylinder body 81, and a cylinder body. 8
1 is a piston yoke 83 movably provided in the axial direction.
Consisting of

As shown in FIGS. 9 and 10, a piston yoke 83 includes a piston receiving portion 84a provided inside a cylinder body 81, a connecting portion 84b connected at one end to the piston receiving portion 84a, and a connecting portion 84b. And a driving unit 84c provided at the other end. The piston receiving portion 84a is movable in the cylinder body 81, the connecting portion 84b is movable in the slit, and the driving portion 84c is axially movable on the outer surface of the cylinder body 81.

At both ends of the piston receiving portion 84a, the pistons 85a,
85b is attached. Therefore, one pressure chamber 86 is provided between one end cover 82a and the piston 85a.
a and the other end cover 82b and the piston 85b
And the other pressure chamber 86b is formed between them.
When compressed air is supplied into one pressure chamber 86a and discharged from the other pressure chamber 86b at the same time, a difference in air pressure occurs between the one pressure chamber 86a and the other pressure chamber 86b. Accordingly, the piston yoke 83 moves to the left in FIG.

A band-shaped elastic inner seal band 87a and an outer seal band 87b are provided between the end covers 82a and 82b at both ends. The inner seal band 87a prevents the fluid pressure in the cylinder body 81 from leaking, and the outer seal band 87b prevents foreign matter such as liquid or dust from entering the cylinder body 81.

A piston mount 88 is mounted on an upper portion of the driving section 84c, and a work (not shown) is arranged on the piston mount 88. The movement of the piston yoke 83 causes the work on the piston mount 88 to move to the cylinder body 8.
1 from one to the other (or from the other to one).

[0008]

However, during operation of the rodless cylinder 80, the inner seal band 8
7a and the outer seal band 87b could not achieve the prevention of dust and dirt from entering the cylinder body 81 from the slit 81a.

That is, the cylinder body 81 is placed on, for example, a workbench (not shown) with the slit 81a facing upward. There is a possibility that dust or the like may enter the cylinder body 81 from the slit 81a.

An object of the present invention is to provide a rodless cylinder 80
During the operation of the cylinder body 8 through the slit 81a
The purpose of the present invention is to prevent dust and the like from entering the inside of the device.

[0011]

In order to achieve the above-mentioned object, a dustproof rodless cylinder device according to the present invention has an axial slit in a tubular cylinder body, and the cylinder extends along the slit along the slit. A rodless cylinder including a drive unit that reciprocates on the outer surface of the main body, a sealless band that seals the slit, and an opening into which the rodless cylinder is inserted, through which the rodless cylinder is inserted. A housed box-shaped case member, at least one row of guide rails projecting in parallel to the axial direction of the cylinder body on an inner surface of a wall of the case member opposed to the slit, and guided by the guide rails. And at least one guide member fixed to the driving section, and when the rodless cylinder is operated, Via a sealing band, characterized in that the dust is prevented from entering into the cylinder body.

According to the dustproof rodless cylinder device of the present invention, the rodless cylinder inserted from the opening of the case member is accommodated in the case member. At least one row of guide rails protrudes from the inner surface of the wall of the case member opposed to the slit, and at least one guide member guided by the guide rail is fixed to the drive unit of the rodless cylinder. Therefore, the slit of the rodless cylinder and the guide rail of the case member face each other.

Further, in the dustproof rodless cylinder device of the present invention, in order to cover a driving portion of the rodless cylinder housed in the case member with the cylinder body, the case member provided with the guide rail is provided. The wall is a bottom wall facing the opening.

According to the dustproof rodless cylinder device of the present invention, the wall of the case member on which the guide rail is disposed is the bottom wall opposed to the opening. Therefore, since the drive part of the rodless cylinder is covered by the cylinder body, the slit is covered by the cylinder body.

Further, in the dustproof rodless cylinder device of the present invention, at least one arm movement space is formed between the wall of the case member and the cylinder body in parallel with the direction of movement of the drive unit. At least one drive arm protruding from the inside of the arm movement space to the outside of the case member via the opening is provided integrally with the portion.

According to the dustproof rodless cylinder device of the present invention, at least one arm movement space is formed between the wall of the case member and the cylinder body in parallel with the direction of movement of the drive unit. While moving in the arm movement space,
At least one drive arm protruding from the inside of the arm movement space to the outside of the case member via the opening is provided integrally with the drive unit. Therefore, the drive arm reciprocates outside the rodless cylinder in synchronization with the reciprocation of the drive unit.

[0017]

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

FIGS. 1 to 6 relate to a first embodiment of a dustproof rodless cylinder device according to the present invention. Note that the same components as those in the conventional example are given the same names, and detailed descriptions thereof are omitted.

As shown in FIG. 1, the dust-proof rodless cylinder device 1 includes a rodless cylinder 2 and a box-shaped case member 3 for accommodating the rodless cylinder 2.

As shown in FIGS. 2 and 3, the rodless cylinder 2 includes a cylinder body 4 having a through hole 4a, a slit 5 formed in the cylinder body 4 in the axial direction, and a cylinder body 4 extending along the slit 5. The piston yoke 6 reciprocates on the outer surface of the cylinder body 4 and end covers 7 and 8 attached to both ends of the cylinder body 4 respectively.

As shown in FIGS. 3 and 4, the piston yoke 6
Consists of a piston receiving portion 9a housed in the through hole 4a, a connecting portion 9b connected at one end to the piston receiving portion 9a, and a driving portion 9c provided at the other end of the connecting portion 9b.

In order to seal the slit 5, an inner seal band 10a is provided between the pair of end covers 7 and 8.
And an outer seal band 10b (corresponding to a seal band in the claims). Inner seal band 1
A piston yoke 6 is sandwiched between the outer seal band 10a and the outer seal band 10b. That is, the inner shield band 10a is hooked on the piston receiving portion 9a, and the outer shield band 10b is hooked on the driving portion 9c.

A drive unit 9 parallel to the axial direction of the cylinder body 4
On both sides of c, drive arms 11, 11 facing upward with respect to the drive section 9c are respectively formed integrally. A mounting hole 12 for mounting the guide member 13 is formed on the lower surface of the driving unit 9c.

As shown in FIG. 4, both end covers 7, 8
Are provided with supply / discharge ports 15, 16 for supplying or discharging compressed air into and from the pressure chambers 13, 14.

As shown in FIG. 4, since the structure of both ends of the cylinder body 4 is the same, the structure of the left end will be described.

As shown in FIG. 2, a piston 21 is mounted on the left side of the piston receiving portion 9a. A cushion pipe 17 is mounted on the piston side of the end cover 7. A hollow hole 18a is formed in the cushion pipe 17, and a supply / discharge port 15 is provided on the end cover side of the hollow hole 18a.
Are connected. A communication hole 18b smaller in diameter than the hollow hole 18a is formed on the piston side of the cushion pipe 17, and the communication hole 18b is connected to the hollow hole 18a.

The end cover 7 is formed with an L-shaped bypass hole 19 for communicating the pressure chamber 13 and the supply / discharge port 15, and the bent portion of the bypass hole 19 has a flow path diameter of the bypass hole 19. A throttle valve 20 for adjustment is provided. When the piston 21 moves to the left end of the cylinder body 4, the cushion hole 2 for accommodating the cushion pipe 17 is provided.
1 a is formed on the piston 21. A piston packing 22 is provided on the outer peripheral surface of the piston 21, and a cushion packing 23 that is in contact with the outer peripheral surface of the cushion pipe 17 is attached to the inner peripheral surface of the piston 21.

As shown in FIG. 1 and FIG.
Has an opening 3 at the top to insert the rodless cylinder 2
1a, a cylinder housing chamber 31 for housing the rodless cylinder 2, and a bottom wall 32 opposed to the opening 31a.
And a guide rail 3 provided on an inner surface 32 a of the bottom wall 32.
And 3.

The guide rail 33 is provided on the inner surface 32 of the bottom wall 32.
a is provided in a row in parallel with the axial direction of the cylinder body 4. The guide rail 33 can be screwed to the case member 3 or can be formed integrally. The guide rail 33 may be provided on the inner surface of one of the side walls 34 and 35 of the case member 3. An attachment portion 36 for fixing or attaching the case member 3 is formed on an outer surface 32 b of the bottom wall 32.

As shown in FIG. 5 and FIG.
The two end covers 7, 8 of the rodless cylinder 2 inserted in 1 are fixed to both end walls 37, 38 of the case member 3, respectively. Connection ports 39 and 40 are formed through both end walls 37 and 38 of the case member 3, respectively.
Supply and discharge ports 15 and 16 of the cylinder body 4 are connected to 9 and 40, respectively.

As shown in FIG. 3 and FIG.
, A guide member 13 having an inverted concave cross section is slidably engaged, and the upper portion of the guide member 13 is attached to the mounting hole 12 of the drive section 9c. Therefore, the guide member 13 is guided by the guide rail 33. The guide member 13 and the drive section 9c can be formed integrally or can be screwed together.

As shown in FIGS. 1 and 5, when the rodless cylinder 2 is housed in the case
An arm moving space 43 is formed in the axial direction between the side walls 34, 35 of the cylinder body 4 and the side surfaces 4b, 4b in the axial direction of the cylinder body 4. Then, the opening 31 is opened from within the arm moving space 43.
The free end of the drive arm 11 protrudes to the outside via a.

As described above, as shown in FIG. 3, by engaging the guide member 13 attached to the driving portion 9c with the guide rail 33, the slit 5 of the cylinder body 4 is opposed to the bottom wall 32 of the case member 3. At the same time, the drive unit 9c is covered with the cylinder body 4. Therefore, the slit 5 and the drive unit 9 can be isolated from the outside (outside air) that contacts the outer surface of the cylinder body 4. Thereby, when the rodless cylinder 2 is operated, it is possible to prevent dust and dirt from flying around the device 1 (outside) due to the movement of the drive unit 9c. At the same time, it is possible to prevent dust and dirt from entering the cylinder body 4 from the slit 5 through the inner seal band 10a and the outer seal band 10b.

FIGS. 7 and 8 show a second embodiment of the dustproof rodless cylinder device according to the present invention. The same components as those in the first embodiment are given the same names and reference numerals, and detailed description is omitted.

As shown in FIGS. 7 and 8, this dustproof rodless cylinder device 1 'includes a pair of guide members 13', 13 'provided on a driving portion 9c of the cylinder body 4.
A pair of guide rails 33 ', 33' are formed on the inner surface of the bottom wall 32 of the case member 3 in the axial direction of the cylinder body 4, and are guided by the guide member 13 '.

A pair of mounting holes 12 ', 12' are formed in the lower part on both sides of the driving portion 9c, and a guide member 13 'is mounted in each mounting hole 12'. The distance between the pair of guide members 13 ', 13' is
3 'and 33'.

As compared with the first embodiment, in the second embodiment, the number of the guide rails 33 'and the number of the guide members 13' are increased one by one. The posture of the driving unit 9c that reciprocates is more stable. Thereby, the posture of the cylinder body 4 is stabilized.

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

For example, in the second embodiment, a case has been described in which two rows of guide rails and two guide members are provided, but the number of each may be three or more.

[0040]

As described above, according to the invention of the dustproof rodless cylinder device, the slit of the rodless cylinder is opposed to the guide rail of the case member, and the guide member mounted on the drive unit is controlled by the guide rail. You will be guided.
That is, by arranging the slit and the drive unit inside, the slit and the drive unit can be isolated from outside (outside air). Therefore, when the rodless cylinder is operated, dust and the like can be prevented from rising around the rodless cylinder by the driving unit that reciprocates on the outer surface of the cylinder body when the rodless cylinder is operated. This can prevent dust and the like from entering the cylinder main body from the slit via the seal band.

According to the invention of the rodless cylinder device for dust prevention, since the guide rail is disposed on the bottom wall opposed to the opening of the case member, the driving portion covers the cylinder body, that is, the slit covers the cylinder body. Will be Therefore, the slit can be completely isolated from the outside air that comes into contact with the outer surface of the cylinder body. Thereby, at the time of operation of the rodless cylinder, intrusion of dust and the like from the slit into the cylinder body via the seal band can be further prevented.

Further, since the driving section is covered with the cylinder body,
The cylinder body can be substituted for the drive unit as a kind of cover. As a result, the number of parts of the entire apparatus can be reduced, and the size of the entire apparatus can be reduced (downsized).

Further, according to the invention of the dustproof rodless cylinder device, the drive arm provided in the drive section projects from the arm movement space of the case member to the outside of the cylinder body through the opening. That is, when the rodless cylinder is operated, only the drive arm can be moved while being exposed to the outside of the rodless cylinder. Therefore, for example, if the load is placed on the drive arm, the load can be separated from the slit when the load is transferred. Thereby, when the rodless cylinder is operated, the slit can be kept away from the dust and the like soaring outside to further prevent the dust and the like from entering.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a dustproof rodless cylinder device according to the present invention.

FIG. 2 is a sectional view showing a left end portion of the cylinder body in FIG.

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG. 3;

FIG. 5 is a diagram viewed from the direction of arrow C in FIG. 1;

FIG. 6 is a diagram viewed from the direction of arrow D in FIG. 1;

FIG. 7 is a sectional view showing a second embodiment of the dustproof rodless cylinder device according to the present invention.

FIG. 8 is a diagram viewed from the direction of arrow E in FIG. 7;

FIG. 9 is a sectional view showing a conventional example.

FIG. 10 is a cross-sectional view of FIG.

[Explanation of symbols]

1, 1 'Dustproof rodless cylinder device 2 Rodless cylinder 3 Case member 4 Cylinder body 5 Slit 9c Drive unit 10a Inner seal band (seal band) 10b Outer seal band (seal band) 11 Drive arm 13, 13' Guide member 31a Opening 32 Bottom wall (wall) 33, 33 'Guide rail 34, 35 Side wall (wall) 43 Arm moving space

Claims (3)

[Claims] 1. A rod having a tubular cylinder body having an axial slit, a driving unit reciprocating on the outer surface of the cylinder body along the slit, and a seal band sealing the slit. And a box-shaped case member having the opening for inserting the rodless cylinder, and accommodating the rodless cylinder through the opening, and an inner surface of a wall of the case member opposed to the slit. The rodless cylinder includes at least one row of guide rails protruding in parallel with the axial direction of the cylinder body, and at least one guide member guided by the guide rails and fixed to the driving unit. During operation, dust and the like are prevented from entering the cylinder body from the slit via the seal band. Dustproof rodless cylinder device that. 2. The dustproof rodless cylinder device according to claim 1, wherein the guide rail is arranged to cover a drive unit of the rodless cylinder housed in the case member with the cylinder body. A dustproof rodless cylinder device, wherein a wall of the member is a bottom wall facing the opening. 3. The dustproof rodless cylinder device according to claim 1, wherein at least one arm movement space is formed between the wall of the case member and the cylinder body in parallel with the direction of movement of the drive unit. A dust-proof rodless cylinder device, wherein at least one drive arm protruding from the inside of the arm movement space to the outside of the case member through the opening is provided integrally with the drive unit. .