JPH0136957Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention expands the sheet-like material in the width direction during the transfer process of the sheet-like material such as cloth, film, paper, etc., and removes vertical wrinkles. This relates to an expander roller that wraps around and guides.

(Prior Art) As shown in Fig. 5, an expander roller for adjusting the width of a seed-like material has conventionally been used, as shown in Fig. 5.
Rollers with a structure curved into an arc were often used, but because the expander roller with the above structure has a small width at one time, it is necessary to support multiple rollers in parallel and wrap the sheet material around it. can be,
The disadvantage was that the device became larger.

Therefore, as shown in FIG. 6, a plurality of long and thin blades 5 are attached to the outer periphery of the support roller 3, which is rotatably supported by a bearing 1 and a shaft 2, along the axis l via a plane bearing or a linear motion bearing 4. Each blade 5, 5... is attached to the link 6 so that it can be moved in parallel.
The blade 5 is reciprocated in the axial direction in one rotation period along with the rotation of the support roller 3 by being connected via a hinge 7 to the outer periphery of a cam ring 8 that rotates within a required inclination plane with respect to the axis l. The width of the sheet-like material S wound around the outer surface of the blade 5 is adjusted.

However, with the above expander roller,
Although the blade 5 makes a complete circular motion around the support roller 3, the hinge 7 attached to the cam ring 8 draws an elliptical trajectory due to its inclination with the axis l, so there is a radial deviation between the two. arise. Therefore, a special mechanism is required for the ring 6 or the hinge 7 to absorb the displacement between them, resulting in a problem that the structure becomes complicated. Further, in this type of expander roller, since the blade 5 is supported by the support roller 3 so as to slide in the axial direction, the sliding resistance is large and high speed rotation is difficult.

In order to overcome this inconvenience, the inventor of the present invention rotatably attaches the guide rail holding disks 12, 12' to the fixed shaft 11 via bearings 13, as shown in FIG. ′, both ends of an appropriate number of guide rails 14 arranged along the axis of the fixed shaft 11 are fixed between them, and the blade 16 is held by the guide rails 14 so as to be slidable in the axial direction via the nylon roller 15. By engaging the nylon roller 17 pivotally supported at the end of the blade 16 between the opposing guide surfaces of two discs 18 and 18' attached to the fixed shaft 11 so as to be able to adjust the inclination, the blade reciprocates. We previously proposed an expander roller that aims to simplify the mechanism and increase the speed of roller rotation. (Refer to Japanese Patent Publication No. 43-257) (Problem to be solved by the invention) However, even in such an expander roller, it is necessary to provide a slight play between the disks 18, 18' and the nylon roller 17. This causes vibration and noise during rotation, and there is also the problem that foreign matter tends to get caught in rotating parts and contact parts, making maintenance complicated, and there remains room for further improvement in this respect.

The present invention was made by focusing on the problems that conventional expander rollers had. A plurality of long and thin blades are arranged in a cylindrical shape around a freely rotatable central shaft, and each blade is connected to the central shaft. The roller body is supported so as to be movable in parallel in the width direction of the roller body via a ring member, and the blade is moved in an elliptical manner, so that the locus of motion of the mechanism that reciprocates the blade in the width direction of the roller body is matched, and the blade support structure is The purpose of the present invention is to simplify the connection between the blade and the blade reciprocating mechanism, thereby solving the above-mentioned problems.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to the accompanying drawings FIGS. 1 to 3.

The roller body 31 of the expander roller of the present invention, on which the sheet material S is wound, is composed of a plurality of elongated blades 27 around a rotatably supported central shaft 21.
are arranged in a cylindrical shape at equal intervals, and the blades 27 facing each other about the central axis 21 are supported at both ends of a plurality of link members pivotably supported on the central axis 21. At least, a cylindrical roller body is constituted by a plurality of blades 27 that are movable in parallel in the axial direction, and a pair of left and right blades 27 are coaxially arranged.

Further, a bearing member 35 pivotally attached to a fixed portion near the outer periphery of the end portion of the left and right roller bodies 31 supports the cam ring 39 so as to be rotatable around the central shaft 21 and to be able to adjust the inclination of the rotation plane. The ends of each of the blades 27 on the cam ring 39 side are connected to the cam ring 39 via joint members 41.

(Function) In the expander roller of the present invention having the above configuration, when the sheet-like material (S) wound around the roller body 31 runs and the roller body 31 rotates,
Blade 27 due to the inclination angle θ ₁ of cam ring 39
While reciprocating in the axial direction in one rotation period, the sheet-like material S is width-aligned, and each blade 27
is supported by the central shaft 21 via the link member 28, so that at the same time as it reciprocates in the axial direction,
The cam ring 3 rotates around the central axis 21 while maintaining a nearly circular elliptical orbit.
9 does not occur in the radial direction, and therefore it is possible to use a spherical joint or other joint member with a simple structure and low mechanical resistance as the joint member 39 between the two, which facilitates manufacturing and maintenance. It can reduce the generation of vibration and noise,
The rotation of the roller body 31 can be made faster.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a front view showing one embodiment of the expander roller of the present invention, FIG. 2 is a sectional view of the same expander roller, and FIG. 3 is a sectional view taken along the - arrow in FIG.

In these figures, reference numeral 21 denotes a center which is inserted into a cylindrical bearing housing 23, 23' integral with an L-shaped bracket 22 fixed to the machine frame, and rotatably supported at both ends by self-aligning ball bearings 24. Around the central axis 21, eight blades 27 made of elongated light metal and having ribs 26 formed on the inner surface of a vertically divided cylindrical outer peripheral part 25 are arranged in a cylindrical shape, eight on each side at equal intervals. has been done.

Further, among the blades 27, 27..., the blade 27, which is located 180 degrees symmetrically about the axis l of the central shaft 21, is inserted through the central oblong hole 28a in the central shaft 21, and has a pin 29 in the center. A rib 26 is inserted into a slit 28b at both ends of the link member 28, and the blade 27 is rotatably connected by a pin 30 passing through the rib 26. Shape S
It constitutes a pair of left and right cylindrical roller bodies 31 that can be wound around.

Note that each blade 27 has a link member 28.
By swinging, it is possible to reciprocate in the axial direction while remaining parallel to the central axis 21, and on the surface of the outer peripheral part 25, a rubber or the like stretched over substantially the entire width of the roller body 31 expands and contracts. A dovetail groove 33 is formed to slidably hold the band-shaped elastic body 32 having elastic properties, and both ends of each band-shaped elastic body 32 are secured to each blade 27 by appropriate means such as screws.
It is fixed to the end of.

On the other hand, 34 is a spherical sliding bearing attached to the outer periphery of the inner end of the cylindrical bearing housing 23 inserted through the central shaft 21, and 35 is a cylindrical retainer supported by the spherical sliding bearing 34 so as to be adjustable in angle. ,
The retainer 35 has a rotation stopper plate 37 fixed to the housing 23 inserted into a slit 36 formed at one end thereof, so that the inclination can be adjusted only within a plane including the plate 37. Rods 40 rotatably support a cam ring 39 via a deep groove ball bearing 38 and protrude radially from the cam ring 39.
and a rod end 4 fixed to the cam ring 39 side end of the blade 27 via a spherical joint 41.
2 are connected.

Reference numeral 43 denotes an air cylinder for tilt adjustment which is swingably supported by a bracket 44 fixed to the cylindrical bearing housing 23, and the piston rod 45 of the air cylinder 43 has its tip connected to a connecting pin 46. The retainer 35 is connected to a tilting arm 47 fixed to the retainer 35, and is included in the blade reciprocating mechanism A' provided at the outer ends of the left and right roller bodies 31.
The tilting arms 47, 47' of 35' are connected to each other via a length-adjustable connecting rod 48, and a known edge detection means such as a phototube type or an air sensor bar detects the meandering state of the sheet S. When the air cylinder 43 rotates one retainer 35 in a direction to correct this, the retainers 35, 35' of the blade reciprocating mechanisms A, A' on both sides tilt simultaneously, and the cam rings 39, 39' The angle of inclination increases and decreases alternately.

Note that the retainers 35, 3 with respect to the axis l
The inclination angles θ ₁ and θ ₁ ' of 5' are normally set with reference to the plane perpendicular to the axis in order to adjust the width of the sheet S while the sheet S is traveling straight as shown in Fig. 4A. The air cylinders 4
3, the meandering correction angle changes within a range θ ₂ of ±10 degrees with this neutral point as a boundary. (4th
(See Figure 2) The expander roller of the present invention has the above-mentioned configuration. Next, to explain its function, first, as the sheet-like material S travels, it is caused by friction with the sheet-like material S. When the roller body 31 rotates, the cam rings 39, 39', which are interlocked with each blade 27 via the spherical joint 41, rotate within a plane with an inclination angle θ ₁ set by the retainers 35, 35', and each blade The link member 28 supporting the blade 27 swings while changing the inclination angle every moment by the retainers 35 and 35', and each blade 27 rotates in the axial direction of the roller body 31 with one rotation period of the roller body 31. make a reciprocating motion. Therefore, the blade 27 on the outer periphery of the roller body 31 is
The band-shaped elastic body 32 gradually expands to the left and right at the part where it is wrapped around, and is in contact with the sheet-shaped material S.
In order to stretch the sheet S in the width direction of the roller body 31, the sheet-like material S is pulled in the width direction with a substantially uniform force over the entire width due to the frictional force with the belt-like elastic body 32, and vertical wrinkles are removed. Different.

Also, during this time, the blade 27 rotates around the rotating shaft 21 while maintaining a substantially circular elliptical orbit due to the swinging of each link member 28.
There is no deviation in the radial direction from the cam ring 39, and due to the action of the spherical joint 41 used as a joint member, vibrations and noise are suppressed to a low level even when rotating at high speed.

In addition, while the sheet-like material S is being width-aligned as described above, the sheet-like material S is removed from the roller body 31.
If the blade is biased to either the left or right side, the edge detection mechanism detects this and operates the air cylinder 43, and the cam ring 39 of the blade reciprocating mechanism A, A' provided on one side of the left and right roller bodies 31 39' is changed all at once, and in order to reduce the maximum axial movement width of the blade 27 on the side where the sheet-like material S is biased and to increase it on the opposite side, the sheet-like material S The bias will be corrected by pulling more strongly on the larger side.

In the above embodiment, a case has been described in which the roller body 31 is rotated as the sheet-like material S travels, but the expander roller of the present invention rotates the central shaft 21 in a fixed direction by an appropriate driving means. It is also possible to forcibly rotate the sheet material S, thereby actively feeding the sheet material S while increasing its width.

Furthermore, regarding the configuration of the roller bodies, in addition to the structure in which the left and right roller bodies are arranged adjacently as in the above embodiment, a structure in which a fixed roller body is interposed between the left and right roller bodies can be used as appropriate.

(Effect of the invention) As described above, the expander roller of the present invention has a plurality of long and thin blades arranged at equal intervals around a rotatably supported central shaft, and each blade is connected to a plurality of links by the central shaft. A cylindrical roller body is constructed by being supported so as to be movable in parallel in the axial direction via a member, and a pair of left and right roller bodies are used, and these are arranged coaxially. Pivotally attach the bearing member to the fixed part,
A cam ring is supported by the bearing member so as to be rotatable around the central axis and to be able to adjust the inclination of the rotational plane, and the ends of the blades are connected to the cam ring via joint members, so that each roller body The rotation of the blade has an almost circular elliptical orbit corresponding to the inclination angle of the cam ring, and there is no radial deviation between the blade and the cam ring at the connection part, so the blade and cam ring are connected. It is possible to use a member with a simple structure such as a spherical joint as a joint member, and with extremely low vibration and noise.Also, in the blade support structure, the link member is pivoted to the central axis with a pin. It is possible to make the movement of the blade follow the cam ring with a simple configuration that allows for easy manufacturing and maintenance, and the use of a joint member and a support structure for the blade that have low mechanical resistance. Since it is possible to do this, it exhibits excellent effects such as being able to sufficiently cope with the increase in speed of the expander roller.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the expander roller of the present invention, Fig. 2 is a sectional view of the same expander roller, Fig. 3 is a sectional view taken along the - arrow in Fig. 2, and Fig. 4 shows the inclination angle of the cam ring. FIGS. 5 to 7 are explanatory diagrams showing the relationship with the conveying state of the sheet-like material, and are schematic diagrams of conventional expander rollers. 21... Central axis, 27... Blade, 28...
Link member, 31... Roller body, 32... Band-shaped elastic body, 35, 35'... Bearing member (retainer), 3
9,39'...Cam ring, S...Sheet-like material.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of long and thin blades are arranged at equal intervals around a rotatably supported central shaft, and the blades facing each other around the central shaft are oscillated about the central shaft. A cylindrical roller body is constituted by a plurality of blades that are movably movably supported at both ends and are movable in parallel in the axial direction, and a pair of left and right blades are used and arranged coaxially. Further, a bearing member is pivotally attached to a fixed portion near the end of the left and right roller bodies, and the bearing member is rotatable around the central axis, and
Supports the cam ring so that the tilt angle of the rotating plane can be adjusted.
An expander roller characterized in that the cam ring side end portions of each of the blades are connected to the cam ring via joint members. 2 The link member has a length slightly shorter than the diameter of the roller body, and the center portion is pivotally supported by a pin perpendicular to the central axis, and a blade is pivoted at the swinging end of each link member. The expander roller according to claim 1 of the registered utility model. 3. The blade fixes both ends of a band-shaped elastic body stretched over the entire longitudinal length of the roller body at both end positions of the roller body, and fixes the middle part of the band-shaped elastic body by dovetail fitting. The expander roller according to claim 1 or 2, which is supported so as to be relatively movable only in the longitudinal direction.