JP2554100Y2 - Rodless cylinder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rodless cylinder in which a slide table is provided with a groove for guiding a seal member, and a cover member for closing the groove is detachably mounted.

[0002]

2. Description of the Related Art In recent years, various types of rodless cylinders have been adopted as a work transfer device in a factory or the like.
This rodless cylinder has the advantage that the occupied area is small and the handling is simple because the cylinder length can be made shorter than the cylinder having a rod.

[0003] By the way, a conventional rodless cylinder is
It has a slide table that slides and displaces along the longitudinal direction of the cylinder, and defines a slit that allows the bore to communicate with the outside along the direction of movement of the slide table.
The slit is closed by a seal member that engages with a roller provided in the slide table, and a groove that guides the seal member to the roller is formed inside the slide table. A cover member is provided fixed to the slide table for closing the groove to prevent intrusion of dust and the like.

[0004]

However, in the conventional rodless cylinder, since the cover member is fixed to the slide table, for example, when assembling the rodless cylinder in a factory or the like, a seal member for closing the slit is provided. There is an inconvenience that it is difficult to check whether or not the roller is appropriately in contact with the roller. Further, it is necessary to apply lubricating oil to a portion where the sealing member is in sliding contact with a roller provided on a slide table. In this case, since the lubricating oil adheres to the back surface of the sealing member, There is an inconvenience that the cover member fixed to the slide table becomes an obstacle and cannot be easily performed.

[0005] The present invention has been made to solve these inconveniences, and a cover member for closing a groove defined in a slide table is easily formed in and removed from the slide table. It is an object of the present invention to provide a rodless cylinder capable of visually confirming an assembled state of a seal member.

[0006]

In order to achieve the above object, the present invention comprises a cylinder and a slide table, wherein the cylinder reciprocates in a cylinder tube and a bore defined in the cylinder tube. A slit extending in the longitudinal direction of the cylinder tube and communicating the outside with the bore, the slit being associated with a first seal member engaged with the piston and the slide table. is closed by a second sealing member that case, the the slide table cover member is provided for closing the groove for guiding the opening and the second sealing member along the displacement direction, said cover member, a substantially U Character shape
And open along the direction of displacement of the slide table
Claws are formed at the positions corresponding to the edges of the grooves with a substantially U-shaped cross section
Characterized in that it is formed.

In this case, a liner is provided on the claw portion of the cover member.
Airtightness in the groove is maintained by attaching a sealing member
And the drip-proof property is improved.

[0008]

In the rodless cylinder according to the present invention, a groove is formed that opens along the direction of displacement of the slide table, and the piston reciprocates in a bore defined in the cylinder tube. A second seal member is guided along the groove. The groove is closed by a cover member detachably mounted in the groove. Further, a claw portion is provided at a portion corresponding to an edge of the groove portion, and a lining member is attached to the claw portion, so that the inside of the groove portion of the slide table can be kept airtight.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the rodless cylinder according to the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a rodless cylinder according to an embodiment of the present invention, and FIGS. 2 and 3 are sectional views of the rodless cylinder shown in FIG. 1, respectively.

The rodless cylinder 10 has a cylinder tube 12 and a slide table 14. A bore 16 extending longitudinally inside the cylinder tube 12
(See FIG. 2), and the bore 16 is in communication with the outside through a slit 18 defined in the end face. As shown in FIGS. 2 and 4, the sensor mounting long groove 20 extends in the longitudinal direction on both side surfaces of the cylinder tube 12.
a, 20b and elongated grooves 20c, 20d for accommodating lead wires, and a fluid bypass passage 22a for centralized piping.
22b is similarly defined to extend in the longitudinal direction.

In FIG. 2, the slide table 1 is located on the upper side of the cylinder tube 12 on both sides of a piston 70 which will be described later, and extends radially outward of the piston 70.
First sliding surfaces 24a and 24b inclined to the fourth side are provided. A slit 18 is defined between the first sliding surface 24a and the first sliding surface 24b, and the slit 18 is formed so as to communicate the bore 16 with the outside as described above. .

Both ends of the cylinder tube 12 constructed as described above are hermetically closed by end caps 40a, 40b in which ports 38a, 38b are defined (see FIG. 1). A magnetic sensor (not shown) for detecting the position of the slide table 14 is mounted on the long groove 20a or 20b provided on the side surface of the cylinder tube 12.

Next, the slide table 14 integrally formed with the piston 70 will be described. As shown in FIGS. 1, 2, and 5, the slide table 14 includes a table portion 44, and a groove portion 42 for guiding a second seal member, which will be described later, is opened above the table portion 44. Is provided. The cover member 45, as shown in FIG.
The claw portions 43a and 43b are provided along the longitudinal direction of the end edge of 5, and concave portions 47a and 47b are defined in the inner wall of the table portion 44 corresponding to the shapes of the claw portions 43a and 43b.

The cover member 45 is formed of, for example, a material such as a synthetic resin. The edge of the cover member 45 is elastically displaced in the direction of the arrow, and the claw portions 43a and 43b formed on the edge of the cover member 45 are formed. Are concave portions 47a, 47 of the table portion 44.
It can be easily mounted by abutting on b. On the other hand, by raising the cover member 45 in an upward direction, the claw portions 43a, which have been in contact with the concave portions 47a, 47b,
43b is disengaged from the concave portions 47a, 47b, and the cover member 45 can be easily removed from the table portion 44. Further, as shown in FIG. 8, the claw portions 43a, 43
By adhering the lining members 49a and 49b to the outer surface of the slide table b, the airtightness of the groove 42 in the slide table 14 can be maintained and the drip-proof property can be improved.

At the bottom of the table 44, long grooves 46a and 46b are provided extending in the longitudinal direction.
The supporting members 48a, 48b are fitted and fixed to the a, 46b. The support members 48a, 48b are engaged with the first sliding surfaces 24a, 24b of the cylinder tube 12, guide the slide table 14 when the piston 70 reciprocates, and apply a load acting on the slide table 14. Second sliding surfaces 50a and 50b are provided which can support and prevent a change in the inner diameter of the bore 16. Support members 48a, 48b
Is formed of, for example, a synthetic resin material having excellent wear resistance and small frictional resistance.

A pair of sliding members 54a and 54b are provided between the slide table 14 and the cylinder tube 12 so as to be substantially parallel to and opposed to the support members 48a and 48b (FIG. 1). , FIG. 2 and FIG. 5). The upper portions of the sliding members 54a and 54b are
The sliding contact member 54 is fixed to the long hole defined in
a, 54b are branched into an outer side surface portion and an inner side surface portion.
Is formed in sliding contact with the upper surface of. Therefore, the sliding member 5
Dust can be prevented from entering from outside by the outer side surfaces of the 4a and 54b, and the lubricating oil attached to the support members 48a and 48b can be prevented from flowing out by the inner side surfaces.

FIG. 5 shows a piston 70 formed integrally with the slide table 14. This piston 70
Has a first pressure receiving surface 72 and a second pressure receiving surface 74 on the opposite side, and cushion seals 76a and 76b are provided therein (see FIG. 3). As shown in FIGS. 2 and 3, belt separators 78 a and 78 b are fixed to a piston yoke 80 above a cylindrical piston 70, and a roller 84 disposed above the piston yoke 80 is a slide table. 14 are arranged inside.
The roller 84 slides against a later-described second seal member during the reciprocating displacement of the piston 70 to facilitate the transfer thereof. Also, the slide table 14
Are provided with scrapers 85a and 85b for removing dust adhering to the upper surface of a first seal member described later. In FIG. 3, reference numeral 86 indicates a passage for a first seal member described later to enter the piston, and reference numeral 87 indicates a cushion ring.

FIG. 6 shows a seal member fitted to the steps 36a and 36b. The first sealing member 90 includes tongue pieces 92a, 92
b, and bulges 94a, 94b are further provided above the tongue pieces 92a, 92b. The bulges 94a, 9
The engagement piece 9 is directed upward from the base 4b so as to slightly expand.
6a and 96b extend. The bulging portions 94a, 94
b, when the internal pressure is applied to the piston 70,
6a, 36b, and furthermore, the engagement pieces 96a, 96b are provided on the inner surface 98 defining the slit 18.
a, 98b. The first seal member 90 is integrally formed of a flexible synthetic resin body as a whole. On the other hand, the second seal member 97 is for closing the slit 18, and is fitted in a groove 99 extending in a longitudinal direction from above the slit 18 defined on the upper end surface of the cylinder tube 12. The first seal member 90 enters the passage 86 of the piston 70, and both ends thereof are fixed to the end caps 40a and 40b together with the second seal member 97.

Next, the operation of the rodless cylinder 10 configured as described above will be described.

First, at the time of assembling the rodless cylinder 10 in a factory or the like, the roller 84 is moved along the groove 42 defined in the table portion 44 of the slide table 14.
The second seal member 97 is stretched so as to be in sliding contact with. The second seal member 97 is disposed at a predetermined tension without slackening along the longitudinal direction. In this case, since the cover member 45 is not attached to the groove 42 of the slide table 14, the assembled state of the second seal member 97 to the roller 84 can be visually recognized through the groove 42 that opens. A second roller 84
It is possible to position the seal member 97 in such a manner that the seal member 97 suitably contacts, and confirm that there is no looseness or twist.
After confirming the assembled state of the second seal member 97, the cover member 45 is attached to the groove 42. At this time, the claw portions 43a, 43 formed at the edge portions of the cover member 45
b are concave portions 47 a, 4 defined on the inner wall of the table portion 44.
By contacting the cover member 7b, the cover member 45 can be easily attached.

The work is fixed on the upper surface of the slide table 14 of the rodless cylinder 10 assembled in this manner. When compressed air is introduced from the port 38a, the compressed air presses the first pressure receiving surface 72 through a passage defined inside the cushion ring 87. This causes the piston 70 to move to the left (arrow X) in FIG.
Direction). At this time, since the piston 70 is formed integrally with the slide table 14 via the piston yoke 80, the slide table 14 is displaced along with the piston 70 and is similarly moved to the left. At this time, the belt separators 78a and 78b operate to separate the first seal member 90 and the second seal member 97 between the slide table 14 and the piston 70. Therefore, the work placed on the slide table 14 can be transferred to the left side in FIG. When compressed air is introduced into the port 38b, the opposite operation is performed.

By the way, in order to displace the piston 70 suitably, lubricating oil is adhered to the back surface of the second seal member 97 and the roller 84 slidably contacting the back surface. Therefore, at the time of maintenance or the like, by removing the cover member 45 from the groove portion 42 of the slide table 14, it is possible to easily apply the lubricating oil to the sliding contact portion between the second seal member 97 and the roller 84. Becomes In addition, the slide table 14 having the concave portions 47a and 47b to which the claw portions 43a and 43b formed on the edge of the cover member 45 are attached.
Is advantageous in that it can be easily manufactured without the need for secondary processing because it is integrally formed by, for example, an extruded material.

[0024]

According to the rodless cylinder of the present invention, the following effects can be obtained.

That is, the slide table is formed with a groove that opens along the displacement direction, and the second seal member is guided along the groove. The groove is closed by a cover member detachably mounted in the groove. Therefore, by simply removing the cover member from the groove, the assembled state of the second seal member can be easily visually recognized at the time of assembly or the like. Further, at the time of maintenance and inspection, it is possible to easily inject lubricating oil or the like into a sliding contact portion between the second seal member and the roller. Furthermore, since the seal member is attached to the claw portion at the edge of the cover member that comes into contact with the groove portion, airtightness can be maintained.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of the rodless cylinder shown in FIG.

FIG. 3 is a sectional view of the rodless cylinder shown in FIG.

FIG. 4 is a perspective view of a cylinder tube constituting the rodless cylinder shown in FIG.

FIG. 5 is a perspective view of a piston and a slide table constituting the rodless cylinder shown in FIG. 1;

6 is a partially omitted longitudinal sectional view showing an engagement state between a first seal member and a slit of the rodless cylinder shown in FIG. 1;

FIG. 7 is a perspective view of a cover member constituting the rodless cylinder shown in FIG.

8 is a perspective view showing a state in which a lining member is adhered to a claw portion of the cover member shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Rodless cylinder 12 ... Cylinder tube 14 ... Slide table 16 ... Bore 18 ... Slit 43a, 43b ... Claw part 45 ... Cover member 47a, 47b ... Recess 49a, 49b ... Lining member 70 ... Piston 90 ... 1st sealing member 97 ... Second seal member

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Naoki Hoshi 4-2-2 Kinudai, Taniwara-mura, Tsukuba-gun, Ibaraki Prefecture SMC Corporation Tsukuba Technical Center (56) References JP-A-64-35105 (JP, A) JP-A-59-137608 (JP, A) JP-A 62-806 (JP, U) JP-A 4-7704 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] A cylinder and a slide table,
The cylinder has a cylinder tube and a piston that reciprocates in a bore defined in the cylinder tube, and defines a slit extending in the longitudinal direction of the cylinder tube to communicate the bore with the outside. and, the slit is closed by the second sealing member engaged with the first seal member engages the piston to the slide table, the the slide table is open along its displacement direction the second seal member A cover member for closing the guiding groove portion is provided, and the cover member has a substantially U-shaped cross section,
U-shaped grooves that open along the cable displacement direction
A rodless cylinder , wherein a claw portion is formed at a portion corresponding to an edge of the portion . 2. A rodless cylinder according to claim 1, the claw portion of the cover member is a rodless cylinder, wherein the lining member is attached.