JP2519416Y2 - Rodless cylinder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rodless cylinder, and more particularly, when a work is conveyed through a guide member provided in the vicinity of the rodless cylinder,
The present invention relates to a rodless cylinder having a floating mechanism for allowing displacement of the guide member in a substantially vertical direction.

[0002]

2. Description of the Related Art In recent years, various rodless cylinders have been adopted as a work transfer device in factories and the like.
This rodless cylinder has the advantages of a smaller occupied area and easier handling because the cylinder length can be made shorter than that of a cylinder having a rod.

By the way, in a conventional rodless cylinder 1, as shown in FIG. 10, a slide table 2 which is slidably displaced along the longitudinal direction of the cylinder is provided, and the slide table 2 is vertically movable. A work 4 is mounted via the table 3. That is, a pair of guide members 5a and 5b are arranged on both sides of the rodless cylinder 1 substantially parallel to the longitudinal direction of the rodless cylinder 1.
The work 4 is placed on the work support plate 6 mounted on the mounting table 3. When the worktable 4 is guided by the guide members 5a and 5b and conveys the work 4, the mounting table 3 is bent, for example, at a substantially central portion of the guide members 5a and 5b due to a load due to the weight of the work 4 or the like. Also, by allowing the displacement (see arrow A) in the substantially vertical direction due to the bending of the guide members 5a and 5b, the displacement is not transmitted to the rodless cylinder 1. Further, when the rodless cylinder 1 and the guide members 5a and 5b are attached to the lower surface of the work support plate 6 via the mounting table 3, the guide members 5a and 5b are respectively attached.
An error in the substantially vertical direction may occur between the mounting surface of b and the mounting surface of the rodless cylinder 1,
Since the mounting table 3 is attached to the slide table 2 so as to be movable in the direction of arrow A, an error due to the mounting surface can be allowed. The mounting table 3 is a bracket (not shown) fixed to the upper surface of the slide table 2.
And a pin member (not shown) that is inserted into the hole defined in the bracket and is fixed by the bracket in a direction orthogonal to the displacement direction of the slide table.
It is composed of a connecting member (not shown) with which the pin member engages with a recess defined at the end.

[0004]

However, in the mounting table 3 of the conventional rodless cylinder 1, for example, since the manufactured bracket has poor dimensional accuracy, it is fixed to the bracket through the hole. A gap may occur between the pin member and the side portion of the bracket. Therefore, when the work 4 is conveyed through the guide members 5a and 5b, the pin member is loosened due to the gap, and the mounting table 3 is preferably displaced in the substantially vertical direction of the guide members 5a and 5b. There is the inconvenience of being unacceptable. Further, there is a disadvantage that the durability of the bracket, the connecting member and the like is deteriorated due to the looseness of the pin member.

The present invention has been made in order to eliminate these disadvantages, and a gap is generated between a pin member which is held by a bracket and is mounted on a side surface portion of a slide table, and the bracket. It is an object of the present invention to provide a rodless cylinder having a floating mechanism that does not occur.

[0006]

In order to achieve the above object, the present invention is a rodless cylinder comprising a cylinder and a slide table, and a floating table which allows displacement of the slide table in a moving direction and a substantially vertical direction. A rodless cylinder having a mechanism, wherein the floating mechanism is a pin member mounted on a side surface portion of the slide table, and a bracket that is screwed to an upper surface portion of the slide table and has side portions holding the pin member. And a connecting member that engages the pin member so as to be displaceable in a substantially vertical direction and supports the work transfer table, and the bracket includes an upper surface of the slide table at both sides of the slide table. A step portion that defines a gap between the slide table and the bracket is provided through the step portion. Characterized in that it is screwed.

[0007]

In the rodless cylinder according to the present invention described above,
By tightening the screw member that fixes the bracket to the slide table, the stepped portion defined on the bracket of the floating mechanism is elastically deformed, and the side part of the bracket is elastically deformed to press the pin member toward the slide table side. To do. Therefore, even if the manufactured bracket is inferior in dimensional accuracy and a gap is formed between the side portion of the bracket and the pin member, the side portion of the bracket presses the pin member to thereby By eliminating the gap, it is possible to prevent looseness generated in the pin member.

[0008]

The preferred embodiments of the rodless cylinder according to the present invention will now be described in detail with reference to the accompanying drawings.

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 FIGS. 1 and 4), the bore 16 is in communication with the outside through a slit 18 defined in the end face portion. As shown in FIGS. 2 and 4, on both side surfaces of the cylinder tube 12, sensor mounting long grooves 20a and 20b and lead wire storing long grooves 20c and 20d are extended in the longitudinal direction.
And a fluid bypass passage 22 for centralized piping.
a and 22b are also defined to extend longitudinally.

In FIGS. 3 and 4, a first sliding surface located on both sides of a piston 70, which will be described later, and inclined toward the slide table 14 toward the radial outside of the piston 70 is located above the cylinder tube 12. 24a and 24b are provided. The first sliding surface 24a and the first sliding surface 24b
A slit 18 is defined between the slit 18 and
Are formed so as to communicate the bore 16 with the outside as described above.

Cylinder tube 1 thus constructed
Both ends of 2 are airtightly closed by end caps 40a and 40b in which ports 38a and 38b are defined (see FIG. 3). The slide table 1 is provided in the long groove 20a or 20b provided on the side surface of the cylinder tube 12.
A magnetic sensor (not shown) for detecting the position of No. 4 is attached.

Next, the slide table 14 integrally formed with the piston 70 will be described. As shown in FIGS. 3, 4 and 7, the slide table 14 includes a table portion 44, and a groove portion 42 for guiding a second seal member described later is opened in the upper portion of the table portion 44, and the groove portion 42 is provided. Is provided with a cover member 45 for closing. The cover member 45 is provided with claw portions 43a and 43b along the longitudinal direction of the edge of the cover member 45.
Corresponding to the shapes of a and 43b, recesses 47a and 47b are defined on the inner wall of the table portion 44. The cover member 4
5 is made of, for example, a material such as synthetic resin, the edge of the cover member 45 is elastically displaced, and the claw portions 43a and 43b formed on the edge of the cover member 45 are recessed portions 47a and 47b of the table portion 44. It can be easily attached by abutting on. On the other hand, when the cover member 45 is directed upward and pulled up, the claw portions 43a and 43b that were in contact with the concave portions 47a and 47b are disengaged from the concave portions 47a and 47b, and the cover member 45 is easily removed from the table portion 44. Can be inserted.

At the bottom of the table portion 44, long grooves 46a, 46b are provided extending in the longitudinal direction. The long grooves 46 are provided.
The supporting members 48a, 48b are fitted and fixed to the a, 46b. The supporting members 48a and 48b are engaged with the first sliding surfaces 24a and 24b of the cylinder tube 12 so as to guide the slide table 14 when the piston 70 reciprocates and to apply a load acting on the slide table 14. Second sliding surfaces 50a, 50b are provided that can support and prevent changes 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 low frictional resistance.

Between the slide table 14 and the cylinder tube 12, a pair of opposed slidable contact members 54a, 54b which are disposed substantially parallel to the support members 48a, 48b are interposed (FIG. 2, FIG. 2). 3, see FIG. 4). The upper portions of the sliding contact members 54a, 54b are fixed to the elongated holes defined in the slide table 14, while the sliding contact members 54a, 54b are
The lower part of b is branched into an outer side surface portion and an inner side surface portion, and both of the branched front end portions are formed in sliding contact with the upper surface of the cylinder tube 12. Therefore, the sliding contact members 54a, 54
The outer side surface portion of b can prevent dust from entering from the outside, and the inner side surface portion can support the support member 48.
It is possible to prevent the lubricating oil attached to a and 48b from flowing out.

FIG. 7 shows a piston 70 formed integrally with the slide table 14. This piston 70
Has a first pressure receiving surface 72 and an opposite second pressure receiving surface 74, and cushion seals 76a and 76b are provided therein (see FIG. 5). As shown in FIGS. 5 and 7, belt separators 78a and 78b are fixed to the upper portion of a cylindrical piston 70 to a piston yoke 80, and a roller 84 disposed above the piston yoke 80 is a slide table. It is arranged inside 14.
The roller 84 is for slidingly contacting a second seal member, which will be described later, during the reciprocating displacement of the piston 70 to facilitate the transfer thereof. Further, inside the slide table 14, scrapers 85a and 85b for removing dust adhering to the upper surface of the first seal member described later are provided (see FIG. 5). In addition, in FIG. 5, reference numeral 86 indicates a passage through which a first seal member described later enters into the piston, and reference numeral 87 indicates a cushion ring.

FIG. 8 shows a seal member fitted to the step portions 36a and 36b (see FIG. 4). The first seal member 90 has tongue pieces 92a and 92b, and further includes bulging portions 94a and 94b above the tongue pieces 92a and 92b. Engaging pieces 96a and 96b extend from the bulging portions 94a and 94b so as to be directed upward and to be slightly expanded. The bulging portions 94a, 94b are for engaging with the step portions 36a, 36b when the internal pressure is applied to the piston 70, and the engaging pieces 96a, 96b define the slit 18. To engage inner surfaces 98a, 98b for. This first
The 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
It is for closing the slit 18, and is fitted into a groove 99 extending in the longitudinal direction from above the slit 18 defined on the upper end surface of the cylinder tube 12. The first
The seal member 90 penetrates into the passage 86 of the piston 70, and both ends thereof are fixed to the end caps 40 a and 40 b together with the second seal member 97.

The work support plate 100 is mounted on the slide table 14. Therefore, the floating mechanism 102 used when a work (not shown) is conveyed through the work supporting plate 100 will be described.

As shown in FIGS. 1 and 2, the floating mechanism 102 has a pin member 104 which is detachably mounted on the side portion of the slide table 14 and has a substantially U-shaped cross section. Hole 106 for inserting the
And a bracket 108 having a substantially L shape in cross section, one side surface of which is connected to the work supporting plate 100 via a screw member 110, and the other side surface of which is engaged with the pin member 104 via a recess 112. And a member 114. As shown in FIG. 10, the rail-shaped guide member 5a is provided close to both sides of the rodless cylinder 10,
5b is provided, and the guide members 5a and 5b are mounted on the lower surface of the work supporting plate 100. The floating mechanism 102 suitably permits the displacement without affecting the rodless cylinder 10 itself with the displacement generated in the work transfer table (in this embodiment, the work support plate 100) mounted on the slide table 14. It works. The bracket 10
8 is provided with a step portion 118 extending in the displacement direction of the slide table 14 and having a narrow gap 116 between the upper surface of the slide table 14 (see FIG. 9), and the bracket 108 has a screw member 120. It is fixedly mounted on the upper surface of the slide table 14 through. Since one side portion of the connecting member 114 is attached by being engaged with the pin member 104 via the recess 112, the connecting member 114 has various shapes depending on the use of the work supporting plate 100. Is formed interchangeably with.

In the step portion 118, a screw member 120 for fixing the bracket 108 to the slide table 14 is shown in FIG.
By being tightened from the state of (A) to the state of FIG. 9 (B), the slide table 14 is deformed to the upper surface side. On the other hand, the side portion of the bracket 108 is elastically deformed in the arrow Y direction along with the deformation of the upper surface portion to press the pin member 104 toward the slide table 14 side. Therefore, even if the manufactured bracket 108 has poor dimensional accuracy and a narrow gap ΔX is generated between the side portion of the bracket 108 and the pin member 104, the side portion of the bracket 108 has the pin member 104. By pressing, it is possible to eliminate the gap ΔX and prevent play in the pin member 104. In the present embodiment, the pin member 104 is inserted into the hole 106 of the bracket 108, and the bracket 10
However, the pin member 104 may be screwed to the hole 106 of the bracket 108. In this case, the pin member 104 is fixed to the side portion of the bracket 108, and the bracket 1
The side portion of 08 is elastically deformed in the direction of the arrow Y along with the deformation of the upper surface of the bracket 108 to press the pin member 104 toward the slide table 14 side.
It is possible to prevent the pin member 104 screwed to the screw 8 from loosening.

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

First, as shown in FIG. 2, the connecting member 1 is attached to the upper surface of the slide table 14 of the rodless cylinder 10.
The work supporting plate 100 is fixed via 14
A work (not shown) is placed on the work support plate 100 (see FIG. 10). When the compressed air is introduced from the port 38a, the compressed air presses the first pressure receiving surface 72 through the passage defined inside the cushion ring 87. Thereby, the piston 70 is displaced in the arrow X direction in FIG. At this time, since the piston 70 is integrally formed 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 in the arrow X direction.
At this time, the belt separators 78 a and 78 b serve to separate the first seal member 90 and the second seal member 97 between the slide table 14 and the piston 70. Therefore, when the slide table 14 of the rodless cylinder 10 is displaced, the work support plate 10
The work placed on 0 can be transferred along the guide members 5a and 5b. When compressed air is introduced into the port 38b, the opposite action is performed.

By the way, when the work is conveyed as described above, the guide members 5a, 5b are caused by the weight of the work or the like.
There is a case where a load is applied to, for example, a bending occurs in the central portions of the guide members 5a and 5b. However, even if the guide members 5a and 5b are displaced in the substantially vertical direction due to such bending, the floating mechanism 1 is formed by the recess 112 of the connecting member 114 that engages with the pin member 104.
02 can preferably allow the displacement. Further, the pin member 104 of the floating mechanism 102.
Is fixed to the slide table 14 side by the pressing force of the side surface of the bracket 108, the pin member 1
There is no backlash in 04.

[0023]

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

That is, when the screw member for fixing the bracket to the slide table is tightened, the stepped portion defined by the bracket of the floating mechanism is elastically deformed toward the upper surface side of the slide table, while the side portion of the bracket is Elastically deforms and presses the pin member toward the slide table.

Therefore, even if the dimensional accuracy of the manufactured bracket is poor and a gap is generated between the side portion of the bracket and the pin member, the side portion of the bracket presses the pin member to cause the gap. It is possible to prevent the backlash from occurring in the pin member. As described above, the floating mechanism can favorably allow the displacement in the substantially vertical direction caused by the bending of the work carrier or the like through the connecting member that engages the pin member in the substantially vertical direction.

Further, since the play of the pin member can be prevented, the life of the floating mechanism can be extended. Further, in manufacturing the bracket provided with the step portion, it is not necessary to press the both side portions of the bracket, so that the bracket can be easily manufactured.

[Brief description of drawings]

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

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

FIG. 3 is a perspective view of a rodless cylinder with a floating mechanism removed.

4 is a cross-sectional view of the rodless cylinder shown in FIG.

5 is a cross-sectional view of the rodless cylinder shown in FIG.

6 is a perspective view of a cylinder tube forming the rodless cylinder shown in FIG. 1. FIG.

FIG. 7 is a perspective view of a piston and a slide table that form the rodless cylinder shown in FIG.

8 is a partially omitted vertical cross-sectional view showing an engaged state of a first seal member and a slit of the rodless cylinder shown in FIG.

9 is a partially omitted sectional view showing a state where the bracket of the floating mechanism shown in FIG. 1 is elastically deformed.

FIG. 10 is an explanatory diagram of a rodless cylinder having a floating mechanism according to a conventional example.

[Explanation of symbols]

 1, 10 ... Rodless cylinder 5a, 5b ... Guide member 12 ... Cylinder tube 14 ... Slide table 16 ... Bore 18 ... Slit 70 ... Piston 90 ... First seal member 97 ... Second seal member 100 ... Work support plate 102 ... Floating Mechanism 104 ... Pin member 108 ... Bracket 110, 120 ... Screw member 114 ... Connecting member 116 ... Gap 118 ... Step portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoki Hoshi 4-2-2 Kinnodai, Taniwahara-mura, Tsukuba-gun, Ibaraki SMC Corporation Tsukuba Technology Center (56) References: Mitsuihei 3-93610 (JP, U) ) Actual Kaihei 4-107502 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A rodless cylinder comprising a cylinder and a slide table, the rodless cylinder having a floating mechanism for allowing displacement of the slide table in a moving direction and a substantially vertical direction, the floating mechanism comprising: A pin member attached to a side surface portion of the table, a bracket screwed to an upper surface portion of the slide table and holding a side portion of the pin member, and a bracket movably engaged with the pin member in a substantially vertical direction. Then
A step of forming a gap between the bracket and the upper surface of the slide table, the bracket including a connecting member that supports the work transfer table. A rodless cylinder, which is screwed to the slide table via a section.