TW201942039A - Turn bar - Google Patents

Abstract

Provided is a turn bar capable of stably supporting webs while having a low manufacturing cost. According to the present invention, there is provided a turn bar for guiding a web-like workpiece in a non-contacting manner, which includes a cylindrical roller body 2 made of a porous body, and an air discharge mechanism 4, 6b, 14 for discharging air from an outer surface of the roller body, wherein the roller body is formed of a plurality of cylindrical porous bodies 12, 12...whose axial end faces are connected to each other.

Description

   Steering rod   

The present invention relates to a steering rod, and more particularly, to a steering rod for guiding a sheet of a long film or the like in a non-contact manner.

There is known a processing method in which a web (web) continuously fed from a roller on an upstream side is processed along a predetermined path and wound on a roller on a downstream side. In this processing process, the sheet is processed by printing, laminating, drying, cutting, etc. while being conveyed along a predetermined path by a number of rollers such as a roll roller, a guide roller, and a take-up roller. .

These rollers are mostly made of metal or rubber, and the sheet is conveyed while being in contact with the surface of these rollers. Therefore, the particles detached from these rollers are transferred to the sheet, and there is a problem that the quality of a final product manufactured from the sheet is reduced.

In addition, due to the speed difference between the sheet and the roller during transportation, the tension acting on the sheet, and the friction between the sheet and the roller, there are also breaks, wrinkles, and stretches in the sheet, which make the final product The problem of reduced yield. Such a problem is obvious in a part of a steering lever that reverses the conveyance direction of the sheet on the conveyance path.

To cope with such a problem, a non-contact type guide roller (steering lever) using an air film has been proposed (Patent Document 1). The guide roller of Patent Document 1 passes a pressurized gas into a hollow body having a plurality of gas ejection holes formed on the surface, and ejects gas from the gas ejection holes on the surface of the hollow body. The non-contact method supports the long film and reverses the conveyance path of the long film.

    [Prior technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent Laid-Open No. 8-245028

The above-mentioned guide roller (steering lever) has the advantages of being able to invert the long film in a non-contact manner, but when the ejection hole is formed by machining, the diameter of the ejection hole becomes larger, so the ejection hole is directly above the ejection hole. The surrounding pressure difference will increase. As a result, the sheet becomes easy to shake, and problems such as the inability to stably support the sheet arise. However, in the case where the ejection holes are formed by laser processing, a problem arises in that the manufacturing cost is increased.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a steering rod that can support a sheet stably with low manufacturing cost.

According to the present invention, there can be provided a steering lever for guiding a sheet-like workpiece in a non-contact manner, the steering lever comprising: a cylindrical roller body made of a porous body; and air from outside the roller body In the air ejection mechanism for ejecting the surface, the roller main body is constituted by a plurality of cylindrical porous bodies connected to each other in an axial end surface.

According to this structure, since a porous body having fine holes as a whole can be used as a roller body that supports the sheet in a non-contact manner, pressurized gas can be surely and uniformly ejected from the entire outer peripheral surface of the roller body, and it is not necessary A step of forming holes for ejecting gas by processing.

According to another preferred aspect of the present invention, the air ejection mechanism includes a hollow shaft in which the cylindrical roller body is mounted on an outer peripheral surface, and the cylindrical porous body is next to the adjacent cylindrical porous body by adhering. It joins, and it has a recessed part in the inner peripheral surface in the vicinity of the junction part with the said adjacent cylindrical porous body.

When the cylindrical porous bodies constituting the roller main body are bonded to each other with an adhesive in the manufacturing process, once the excess adhesive overflowing from the joining portion flows out to the surface side of the cylindrical porous body serving as a sheet supporting surface, Since the blowout of pressurized air from the support surface of the sheet is prevented, it is not easy to support the sheet.

However, according to the structure as described above, when the cylindrical porous bodies are bonded to each other by the adhesive, the adhesive can be accommodated in the recessed portion provided on the inner peripheral surface near the joint portion with the adjacent cylindrical porous body. Therefore, the cylindrical porous body is more firmly joined to the roller body by the adhesive in the recess.

According to another preferred aspect of the present invention, the recessed portion constitutes an annular groove extending in a circumferential direction on an inner peripheral surface of the cylindrical porous body.

According to another preferred aspect of the present invention, an axial end face of one cylindrical porous body joined with another cylindrical porous body, and the other cylindrical porous body joined with the one cylindrical porous body. The end surface has a complementary uneven shape.

According to this structure, in the joint portion between the cylindrical porous bodies, the radial strength is increased, and even if a force generated by the pressurized gas from the hollow shaft acts on the roller composed of the connected cylindrical porous bodies, The main body can also prevent the roller main body from being damaged in the connecting part.

According to another preferred aspect of the present invention, at least one ring-shaped convex portion is formed on an axial end surface of one cylindrical porous body that is joined to the other cylindrical porous body. An end surface joined to the one cylindrical porous body is formed with an annular recessed portion complementary to the annular protruding portion.

According to this structure, in the connecting portions of the cylindrical porous bodies, the radial strength is further increased, and even if a greater force is exerted on the connected cylindrical porous bodies from the radially inner side to the radially outer side, The roller main body formed by the body can also prevent the roller main body from being damaged at the connecting portion.

According to another preferred aspect of the present invention, at least one annular buffer groove is formed on an axial end surface of one cylindrical porous body that is joined to the other cylindrical porous body.

According to this structure, when the cylindrical porous bodies are bonded to each other by the adhesive, the excess adhesive can be accommodated in a ring shape formed in the axial end surface of the cylindrical porous body joined to the adjacent cylindrical porous body. The buffer groove is not easy to flow out to the surface side of the cylindrical porous body that becomes the sheet supporting surface, and the quality of the steering rod is improved.

According to another preferred aspect of the present invention, the cylindrical porous body is made of porous carbon.

According to another preferred aspect of the present invention, each of the cylindrical porous bodies is provided with a pressurized air flow path extending in a circumferential direction at a center position in the longitudinal direction, and the hollow shaft has a radial flow path. The pressurized air flow path is connected to the pressurized air flow path and extends in a radial direction.

According to the present invention, it is possible to provide a steering rod that can be manufactured with low cost and can stably support a sheet.

1‧‧‧ Steering lever

2‧‧‧roller body

4‧‧‧ hollow shaft

6‧‧‧Large diameter section

6b‧‧‧Air supply channel

8, 10‧‧‧ Trail

12‧‧‧ cylindrical porous body

14‧‧‧ Pressurized air flow path

16‧‧‧ recess

17‧‧‧ annular groove

18‧‧‧ one end face in the axial direction

20‧‧‧ the other end in the axial direction

22‧‧‧ convex section

24‧‧‧ concave section

FIG. 1 is a schematic perspective view of a steering rod according to a preferred embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along the line II-II in Fig. 1.

Fig. 3 is an enlarged view of the vicinity of a cylindrical porous body located on one end side.

Fig. 4 is a sectional view taken along line IV-IV of Fig. 1.

Fig. 5 is a cross-sectional view for explaining the operation of the steering lever of Fig. 1.

Fig. 6 is a view for explaining a manufacturing process of the steering rod of Fig. 1.

Fig. 7 is a view for explaining a manufacturing process of the steering rod of Fig. 1.

Fig. 8 is a view for explaining a manufacturing process of the steering rod of Fig. 1.

Fig. 9 is a cross-sectional view of the structure of a cylindrical porous body according to a modification of the steering rod of Fig. 1.

Fig. 10 is a cross-sectional view of the structure of a cylindrical porous body according to another modification of the steering rod of Fig. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of a steering rod 1 according to a preferred embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1.

The steering lever 1 according to this embodiment is a conveying path for conveying a long sheet such as a long film, and is arranged at a reversing portion or the like for reversing the conveying direction of the sheet, and supports the sheet in a non-contact manner. The material used is to change its conveying direction.

As shown in FIGS. 1 and 2, the steering lever 1 includes a substantially cylindrical roller body 2 having a substantially cylindrical shape and made of porous carbon of a porous body, and is mounted on an outer peripheral surface. The roller body 2 has a substantially cylindrical hollow shaft 4.

The hollow shaft 4 includes a hollow large-diameter portion 6 at the center in the axial direction, and hollow small-diameter portions 8 and 10 disposed at both ends of the large-diameter portion 6. The large-diameter portion 6 has an outer diameter substantially equal to the inner diameter of the roller body 2, and has flanges 6 a and 6 a extending radially outward at both ends in the axial direction. The roller body 2 is mounted between the flanges 6 a and 6 a. . The internal space of the large-diameter portion 6 is configured to be in fluid communication with the internal spaces of the small-diameter portions 8 and 10, and the pressurized gas introduced through the small-diameter portion can flow into the internal space of the large-diameter portion 6.

In the steering lever 1 according to this embodiment, the roller body 2 is formed of three cylindrical porous bodies 12, 12, and 12. Each of the cylindrical porous bodies 12, 12, 12 has the same shape, and the axial end surfaces of adjacent cylindrical porous bodies are bonded to each other by bonding with an adhesive, thereby forming the roller body 2. The roller body 2 is, in detail, each cylindrical porous body 12, 12, 12 is bonded to a hollow shaft by an adhesive.

FIG. 3 is an enlarged view of the vicinity of the tubular porous body 12 on one end side, and FIG. 4 is a radial cross-sectional view of the tubular porous body 12 alone.

As shown in FIGS. 2 to 4, each of the cylindrical porous bodies 12 is provided with an annular pressurized air flow path 14 extending in the circumferential direction at a center position in the longitudinal direction of the inner peripheral surface.

On the other hand, as shown in FIG. 2 and FIG. 3, the diameter of the large-diameter portion 6 of the hollow shaft 4 located radially inward of each of the pressurized air flow paths 14 of the cylindrical porous body 12 is formed with a radial direction. The air supply path 6 b penetrates the peripheral wall of the large-diameter portion 6. As a result, the internal space of the large-diameter portion 6 and the small-diameter portions 8 and 10 of the hollow shaft 4 is in fluid communication with each of the pressurized air flow paths 14 of the cylindrical porous body 12 via the air supply passage 6b, The path is formed with a radial flow path for supplying pressurized air.

Moreover, each cylindrical porous body 12 is provided with an annular notch-like recessed portion 16 at both ends in the axial direction of the inner peripheral surface. In the roller body 2 in which the cylindrical porous bodies 12 and 12 adjacent to each other in the axial direction are joined to each other, the opposed concave portions 16 and 16 of the adjacent cylindrical porous bodies 12 and 12 communicate with each other, and the inner periphery of the roller body 2 An annular groove 17 extending in the circumferential direction is formed near the joint portion.

The end of the joint portion between the adjacent tubular porous bodies 12 and 12 is located in the annular groove 17. A part of the adhesive that joins the cylindrical porous bodies 12 and 12 to each other can be accommodated in the annular groove 17, and the roller body 2 (more specifically, each cylindrical shape) is made of the adhesive of the annular groove 17. The porous bodies 12, 12, 12) are more firmly joined to the hollow shaft 4.

The depth (radial length) of the annular groove 17 is preferably set to 1:60 (2%) to 1:13 (8%) of the length of the annular groove 17 (length in the axial direction), and more preferably set. 4% to 5%.

In the steering rod 1 of the present embodiment, one end surface 18 and the other end surface 20 of the cylindrical porous body 12 in the axial direction have the same complementary shape. Specifically, as shown in FIG. 4, one end surface 18 in the axial direction of each cylindrical porous body 12 has a ring-shaped convex section portion 22 protruding in a stepped manner toward the outside in the axial direction on the inner side in the circumferential direction, and the axis The other end surface 20 in the direction has a ring-shaped concave segment portion 24 recessed in a stepped shape toward the inside in the axial direction in a complementary manner to the ring-shaped convex segment portion 22 protruding outward in the axial direction.

Therefore, as shown in FIG. 3, when one end surface 18 of one cylindrical porous body 12 is joined to the other end surface 20 of the other cylindrical porous body 12, one cylindrical porous body 12 and another When one cylindrical porous body 12 is connected, as shown in FIG. 2 and FIG. 3, the annular section 22 of one end surface 18 of the axial direction of one cylindrical porous body 12 is fitted into the other cylindrical porous body. The annular section 22 of the other end surface 20 of the body 12 in the axial direction of the body 12 obtains a high mechanical strength against a radial force.

In the steering rod 1 of the present embodiment, an annular buffer groove 26 is formed at a position radially outside the other end surface 20 in the axial direction of the cylindrical porous body 12. The ring-shaped buffer groove 26 can also accommodate an excess portion of the adhesive that joins the cylindrical porous bodies 12 and 12 to each other.

As shown by arrows A and B in FIG. 2, the steering rod 1 configured in this manner is once pressurized air is introduced into the inner space of the large-diameter portion 6 through the small-diameter portions 8 and 10 of the hollow shaft 4. As shown by arrow C in FIG. 3, each of the pressurized air flow paths 14 flowing into the cylindrical porous body 12 through the air supply path 6b passes through the cylindrical porous body formed of porous carbon having air permeability. The inside of 12 is ejected from the entire outer surface of the roller body 2 constituted by the cylindrical porous body 12 as indicated by an arrow D in FIG. 3.

As a result, as shown in FIG. 5, the sheet W can be supported in a non-contact manner on the outer peripheral surface of the roller body 2 and the conveyance path can be reversed.

Next, a method for manufacturing the steering rod 1 according to this embodiment will be described.

6 to 8 are diagrams schematically showing a process of attaching the cylindrical porous body 12 to the hollow shaft 4 during the manufacture of the steering rod 1.

First, as shown in FIG. 6, the first cylindrical porous body 12 is attached to a predetermined position on the outer peripheral surface of the hollow shaft 4, and an adhesive S is arranged on one end surface in the axial direction of the first cylindrical porous body 12. Next, as shown in FIG. 7, on the outer peripheral surface of the hollow shaft 4, the second cylindrical porous body 12 ′ is pressed against the other end surface of the first cylindrical porous body 12 on which the adhesive S is disposed. At the same time, it is arranged at a predetermined position on the outer peripheral surface of the hollow shaft 4.

Next, as shown in Fig. 8, an adhesive S is arranged on one end surface in the axial direction of the second cylindrical porous body 12 '. Finally, on the outer peripheral surface of the hollow shaft 4, the third cylindrical porous body is pressed against the other end surface of the second cylindrical porous body 12 ′ where the adhesive S is arranged, and simultaneously disposed on the outer peripheral surface of the hollow shaft 4. On the predetermined position. In addition, an adhesive that joins the cylindrical porous bodies to each other also joins the cylindrical porous bodies to the hollow shaft.

When the second or third cylindrical porous body is pressed on the outer peripheral surface of the hollow shaft 4 to the other end surface of the first or second cylindrical porous body on which the adhesive S is arranged, the adhesive S is Pushed away. At this time, the excess adhesive agent S is accommodated in the annular recessed portion 16 formed near the joint portion of the adjacent cylindrical porous body and the buffer groove 26 of the other end surface 20 of the cylindrical porous body 12, which can be avoided. It overflows to the outer peripheral surface side of the roller main body 2.

At this time, a part of the adhesive S is accommodated in the annular recessed portion 16 formed near the joint portion of the adjacent cylindrical porous body, and the porous body 12 is joined to the hollow shaft 4. In addition, the excess adhesive agent S is accommodated in the buffer groove 26 of the other end surface 20 of the cylindrical porous body 12 and can be prevented from overflowing to the outer peripheral surface side of the roller body 2.

The present invention is not limited to the above-mentioned embodiment, and various changes and modifications can be made within the scope of the technical idea described in the scope of patent application.

In the steering rod 1 of the above embodiment, the cylindrical porous body is formed of porous carbon, but may be formed of other porous materials such as porous ceramics and porous metals.

The steering rod 1 of the above embodiment has a structure in which a ring-shaped buffer groove is formed on the radially outer side of the other end surface in the axial direction of the cylindrical porous body, but it may have a structure without a buffer groove. Or the structure of a buffer groove provided with another aspect (configuration, number).

Furthermore, in the above-mentioned embodiment, one axial direction end surface 18 of each cylindrical porous body 12 has a ring-shaped convex section portion 22 protruding in a step shape toward the axial direction outside on the inner side in the circumferential direction, and the other end surface in the axial direction. 20 has a structure having a ring-shaped concave segment portion 24 recessed in a stepwise shape toward the inside in the axial direction, complementary to the ring-shaped convex segment portion 22 protruding outward in the axial direction. The end faces of the joints between the bodies have a complementary shape structure.

In addition, the shape and position of the segment portion may be other shapes. For example, as shown in FIG. 9, a structure having a complementary shape may be realized for the convex section 220 composed of an inclined surface and the concave section 240 complementary to the convex section 220. Further, as shown in FIG. 10, a structure having a complementary shape may be realized by a convex portion 320 and a complementary concave portion 340 provided at a radial center position.

Claims (8)

    A steering rod for guiding a sheet-like workpiece in a non-contact manner, the steering rod includes a cylindrical roller body made of a porous body, and an air ejection mechanism for ejecting air from an outer surface of the roller body The roller main body is composed of a plurality of cylindrical porous bodies whose end faces in the axial direction are connected to each other.         The steering rod according to item 1 of the scope of patent application, wherein the air ejection mechanism includes a hollow shaft in which the cylindrical roller body is mounted on an outer peripheral surface, and the cylindrical porous body is next to the adjacent The cylindrical porous body is joined, and has a recessed portion on the inner peripheral surface in the vicinity of the joint portion with the adjacent cylindrical porous body.         The steering rod according to item 2 of the patent application range, wherein the recessed portion constitutes an annular groove extending in a circumferential direction on an inner peripheral surface of the cylindrical porous body.         The steering rod according to any one of claims 1 to 3, wherein an axial end face of one cylindrical porous body that is joined to another cylindrical porous body, and the other cylindrical porous body described above The end surface of the body that is joined to the one cylindrical porous body has a complementary uneven shape.         The steering rod according to any one of claims 1 to 3, wherein at least one annular convex portion is formed on an axial end surface of one cylindrical porous body that is joined to the other cylindrical porous body. An annular concave portion complementary to the annular convex portion is formed on an end surface of the another cylindrical porous body that is joined to the one cylindrical porous body.         The steering rod according to any one of claims 1 to 3, wherein at least one annular buffer is formed on an axial end surface of one cylindrical porous body that is joined to the other cylindrical porous body. Trench.         The steering rod according to any one of claims 1 to 3, wherein the cylindrical porous body is made of porous carbon.         The steering rod according to any one of claims 1 to 3, wherein each of the cylindrical porous bodies has a pressurized air flow path extending in a circumferential direction at a center position in the longitudinal direction, and the hollow shaft has A radial flow path extending in a radial direction, connected to the pressurized air flow path, and supplying pressurized air to the pressurized air flow path.