JP3631098B2 - Press roller drive device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for driving a press roller, and more particularly to a drive device having a function of moving the press roller in the axial direction thereof.
[0002]
[Prior art]
A press roller driving device that presses a press roller in contact with a winding surface when a so-called warp sheet in which a large number of warps are arranged in a sheet shape is wound around a predetermined warp beam is described in, for example, JP-A-9-170130 Has been. This press roller driving device places the press roller on at least two rolling rollers including at least one frustoconical (conical cone) rolling roller supported by a support shaft via a spherical bearing. .
[0003]
In the press roller driving device described above, the frustoconical rolling roller is driven and rotated by the rotation of the press roller. That is, the press roller that is in a pressed state in response to the rotation of the warp beam that is driven to wind up is driven to rotate, and the truncated cone-shaped rolling roller on which the roller is placed rotates in response to the rotation of the press roller, With such driven rotation, a swinging motion is generated in which the rotation axis swings in the front-rear direction.
Along with the swinging motion and driven rotation of the frustoconical rolling roller, a restoring force for returning the frustoconical rolling roller to its original state acts on the frustoconical rolling roller. The generation mechanism of the oscillating motion of the frustoconical rolling roller is described in Japanese Patent Laid-Open No. 9-170130. Although not described in detail, the outline of such a mechanism is obtained as follows. .
When the press roller is placed on the rolling roller, the frustoconical rolling roller receives a pressing force from the press roller, the rotation axis is inclined, and is in surface contact with the press roller. When the press roller is driven to rotate, the rotational axis of the frustoconical rolling roller is gradually inclined due to the difference in peripheral speed at the contact portion between the press roller and the frustoconical rolling roller. Next, with the inclination of the rotation axis of the frustoconical rolling roller, the point of contact with the press roller moves to a portion with a large diameter dimension, so that the rotational resistance of the frustoconical rolling roller gradually increases. The acting force due to this increase in resistance is generated as an acting force (restoring force) in a direction to restore the inclination of the rotation axis, and the inclination of the rotation axis of the frustoconical rolling roller gradually inclines in the opposite direction. Following rotation, the contact state eventually returns from point contact to surface contact. As a result of repeating these, it is considered that the rocking motion continuously occurs.
The range of the oscillating motion of the frustoconical rolling roller is the degree (angle) of the so-called “tilt of the frustoconical rolling roller”, which is the inclination of the central axis of the frustoconical rolling roller with respect to the central axis of the press roller. Varies by
[0004]
The frustum-shaped rolling roller generates an acting force that moves the press roller in one axial direction in accordance with the swinging motion. Due to this acting force, the press roller rotates in contact with the inner facing surface of the beam flange. Therefore, the press roller and its driving device are configured so that an action force for moving the pair of press rollers toward the inner facing surface of the beam flange is generated, and each press roller contacts the inner facing surface of the beam flange. By rotating in this state, a high-quality warp beam in which a desired winding hardness is maintained over the entire width of the beam (length in the axial direction) can be manufactured.
[0005]
[Problems to be solved]
In the press roller driving device described above, the truncated cone-shaped rolling roller is supported by the support shaft via the spherical bearing. Therefore, when the press roller is placed on the rolling roller, the truncated cone-shaped rolling roller is May be overly inclined.
[0006]
In such a state, even if the press roller is placed on the rolling roller and rotated, the force acting on the frustoconical rolling roller itself changes greatly compared to the normal time due to the inclination of the frustoconical rolling roller. . For example, the restoring force described above does not work due to an increase in the rotational resistance of the frustoconical rolling roller due to an excessive inclination. As a result, the truncated cone-shaped rolling roller does not generate not only the swinging motion but also the driven rolling.
According to the studies by the present inventors, the magnitude of the acting force (restoring force) generated along with the swinging motion has been influenced by the design parameters such as the taper of the truncated cone-shaped rolling roller. It has been recognized from experience, and it has been confirmed that there are individual tilt ranges of the rotation axis corresponding to this acting force, in which the rocking motion of the frustoconical rolling roller continuously occurs. When the press roller is placed, if the inclination of the frustoconical rolling roller is regulated in advance so that at least the inclination of the rotational axis of the frustoconical rolling roller does not exceed this range, the winding operation is in progress. It was confirmed that the rocking motion always occurred continuously.
[0007]
Therefore, in the drive device for the press roller, it is important that after the press roller is placed on the rolling roller, the rolling roller is driven to rotate while reliably oscillating.
[0008]
[Solution, action and effect]
The press roller driving device according to the present invention has at least two rolling rollers including at least one frustoconical rolling roller supported by a support shaft via a spherical bearing, and presses the rolling roller. A roller is placed, and the frustoconical rolling roller is driven and rotated by the rotation of the press roller. Such a press roller driving device is a restricting member having a contact portion with which the frustoconical rolling roller can contact, and the restricting member for restricting the inclination of the frustoconical rolling roller by the contact portion. Prepare in the vicinity of the trapezoidal rolling roller.
[0009]
The inclination of the truncated cone-shaped rolling roller is regulated within a predetermined angle by the regulating member, and when the press roller is newly placed on the rolling roller, the truncated cone-shaped rolling roller is not greatly inclined. For this reason, after the truncated cone-shaped rolling roller receives the press roller, the frustum-shaped rolling roller is reliably driven to rotate while being oscillated to reliably generate an acting force that moves the press roller in a predetermined direction.
[0010]
The contact portion may be a portion or a surface that restricts the inclination of the frustoconical rolling roller to a range where the rocking motion can occur without interfering with the rocking motion of the frustoconical rolling roller. it can.
[0011]
In a preferred embodiment, the contact portion can contact any one of both side surfaces in the axial direction of the frustoconical rolling roller, and is a surface of the restricting member or a part thereof.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 to 3, the press roller driving device 10 is used as a device that receives a pair of press rollers 12 and presses both press rollers 12 against the winding surface 16 of the warp beam 14.
[0013]
The beam 14 is rotatably received around an axis extending in the horizontal direction by a frame (not shown) of the warp beam forming apparatus, and is rotated around the axis via rotational driving means (not shown). The warp sheet is wound up to a predetermined diameter between the beam flanges 18 assembled at both ends of a winding core (not shown). One end surface 12a of each press roller 12 is formed in a hemispherical shape.
Instead of making the one end surface 12a hemispherical, a columnar member made of a material such as a synthetic resin and having an appropriate hardness and formed in a columnar shape is assembled to the end of the press roller 12, thereby The entire end surface may be brought into contact with the inner surface 18 a of the beam flange 18.
[0014]
The press roller drive device 10 extends in the horizontal direction to a pair of pusher arms 20 assembled to the frame at one end so as to be angularly rotatable around an axis extending in the horizontal direction, and to the other end of each arm 22. A press roller bracket 22 assembled so as to be pivotable about an axis, and three rolling rollers 24, 26, 28 assembled to each bracket 22 so as to be rotatable around an axis extending in parallel with the horizontal direction. Including.
[0015]
The arm 20 is rotated angularly in synchronism around the above-described axis by an air cylinder (not shown). Each bracket 22 and the rolling roller 26 located in the center are supported on the corresponding arm 20 by a common support shaft 30. The rolling rollers 24 and 28 are supported on the corresponding brackets 22 by support shafts 32 and 34, respectively, and have substantially the same (diameter) dimensions.
[0016]
As shown in FIG. 3, one of the support shafts 30, 32, and 34 can be composed of a bolt 36 having a head and a collar 38 through which the bolt 36 is passed. A washer 40 is disposed at the tip of each bolt 36 and a nut 42 is screwed together. However, each support shaft may be a general bolt or pivot.
[0017]
Of the three rolling rollers supported by each bracket 22, the rolling roller 26 located in the center is a general ring-shaped (wheel-shaped) rolling roller, and is supported by a general radial bearing. The support shaft 30 is assembled.
[0018]
On the other hand, the rolling rollers 24 and 28 located at both ends of the bracket 22 are so-called frustoconical rolling rollers having a frustoconical (conical frusto-conical) outer peripheral surface, and each is supported by a spherical bearing 44. The support shafts 32 and 34 are assembled. Each frustoconical rolling roller has a spherical inner surface corresponding to the receiving surface of the spherical bearing 44. More specifically, it has a spherical bearing in which the outer ring of the bearing is straight and the inside is formed into a spherical surface.
[0019]
The support shafts 30, 32, and 34 extend in the horizontal direction in parallel with each other and the press roller 12. The distance between the support shafts 30 and 32 and the distance between the support shafts 30 and 34 are substantially the same. The apex angles (taper angles) of the outer peripheral surfaces of the rolling rollers 24 and 28 are the same.
[0020]
One press roller 12 is received by rolling rollers 24 and 26, and the other press roller 12 is received by rolling rollers 26 and 28. The rolling rollers 24 and 28 received by the same bracket 22 have their outer peripheral surfaces inclined in opposite directions. However, the frustoconical rolling rollers that receive the same press roller 12 have the same inclination direction on the outer peripheral surface. More specifically, in the truncated cone-shaped rolling roller, the direction and the taper of each inclination are determined in consideration of the direction and magnitude of the force that acts on the press roller in the axial direction.
[0021]
The rolling rollers 24, 26, 28 have at least a part of their outer surfaces in contact with a predetermined press roller 12. For this reason, the ring-shaped rolling roller 26 is driven to rotate as the corresponding press roller 12 rotates. Further, the frustoconical rolling rollers 24 and 28 not only rotate in accordance with the rotation of the corresponding press roller 12 but also oscillate.
[0022]
As representatively shown in FIG. 3, a pair of engaging members, that is, regulating members 46 are disposed on the support shafts 32 and 34 that support the frustoconical rolling rollers 24 and 28, respectively. In the illustrated example, each restricting member 46 has a disk shape and has substantially the same diameter as the corresponding frustoconical rolling roller.
[0023]
The pair of restricting members 46 are assembled to the corresponding support shafts so that the corresponding frustoconical rolling rollers are located between the restricting members 46. Each regulating member 46 has a contact portion, that is, a contact portion 46a with which the corresponding truncated cone-shaped rolling roller can contact. In the illustrated example, each contact portion 46a is an inner surface on the truncated cone-shaped rolling roller side formed so as to extend in the axial diameter direction of the support shafts 32 and 34.
[0024]
The gaps L1 and L2 between each restricting member 46 and the corresponding frustoconical rolling roller do not interfere with the above-described swinging motion of the corresponding frustoconical rolling roller by the contact portion 46a. The inclination of the trapezoidal rolling roller is restricted to a predetermined angle range in which the above-described swinging motion can occur. The inclination of the frustoconical rolling roller is the inclination of the central axis of the frustoconical rolling roller with respect to the central axis of the press roller.
When the warp is wound around the warp beam, the press roller 12 is placed on the press roller driving device 10. In the present invention, a part of the frustoconical rolling rollers 24 and 28 abuts on the corresponding contact portion 46a of the corresponding restricting member 46 so as to be regulated within a predetermined angle range. For this reason, when the press roller 12 is placed on the rolling rollers 24, 26 and 28, the frustoconical rolling rollers 24 and 28 receive a force from the press roller 12 and make line contact or surface contact with the press roller 12. As shown in the figure, a predetermined gap is maintained between the frustoconical rolling rollers 24 and 28 and the corresponding contact portion 26a.
[0025]
After that, the press roller driving device 10 rotates the arms 20 and 20 angularly in a state where both the press rollers 12 are received on a predetermined group of rolling rollers, so that both press rollers 12 are rolled up by the surface of the beam 14. 16 is pressed. When the beam 14 is rotated in the direction of the arrow 50 in FIG. 1 in this state, the press roller 12 is rotated in the direction of the arrow 52, and the rolling rollers 24, 26, and 28 are driven and rotated in the direction of the arrow 54.
[0026]
However, each frustoconical rolling roller is assembled to the corresponding support shaft by the spherical bearing 44, and the acting force acting on the frustoconical rolling roller varies depending on the inclination. Oscillate with the follower rotation.
[0027]
The swinging motion of the frustoconical rolling rollers 24 and 28 and the action and effect obtained thereby are described in detail in Japanese Patent Laid-Open No. 9-170130 already described as one of the prior arts. Detailed description is omitted.
[0028]
Due to the swinging motion as described above, each frustoconical rolling roller 24 generates a force (indicated by an arrow 56 in FIG. 1) that moves the corresponding press roller 12 to one side in its axial direction. The rolling roller 28 generates a force (indicated by an arrow 58 in FIG. 1) that moves the corresponding press roller 12 to the other in the axial direction. Thereby, each press roller 12 presses the hemispherical end surface 12 a against the inner facing end surface 18 a of the corresponding beam flange 18.
[0029]
As described above, when the press roller 12 rotates in contact with the inner facing surface 18a of the beam flange 18, a good warp beam in which a desired winding hardness is maintained over the entire width (length in the axial direction) of the beam 14. Is manufactured.
[0030]
The range of the oscillating motion of the rolling rollers 24 and 28 varies depending on the design parameters such as the taper angle of the truncated cone-shaped rolling roller, the material of the truncated cone-shaped rolling roller and the regulating member (particularly the contact portion). Therefore, the size of the gap between the contact portion 46a and the truncated cone-shaped rolling rollers 24, 28 is determined in consideration of the swing range of the truncated cone-shaped rolling rollers.
[0031]
The gaps L1 and L2 between each frustoconical rolling roller and the corresponding contact portion 46a are, for example, in the range of 4 mm to 1 mm when the taper of the frustoconical rolling roller is 1/10 to 1/200. Can be set to The material of the rolling rollers 24, 26, and 28 is appropriately determined, but it is preferable to use a material having an appropriate elasticity, more specifically an appropriate hardness, for example, a synthetic resin, rather than a rigid body.
[0032]
When exchanging the beam 14, the press roller 12 is removed from the rolling rollers 24, 26, 28, and the press roller 12 is placed on the rolling rollers 24, 26, 28, respectively. 24, 26, and 28 are retracted by the arm 20 to a position where the press roller 12 is greatly separated from the beam 14.
[0033]
While the press roller 12 is removed from the rolling rollers 24, 26, 28, the truncated cone-shaped rolling rollers 24 or 28 tend to be excessively inclined. However, such inclination of the frustoconical rolling roller 24 or 28 is caused by a part of the frustoconical rolling roller 24 or 28 coming into contact with the contact portion 46a of the corresponding restricting member 46, so that the predetermined angular range is reached. Be regulated within.
[0034]
For this reason, when the press roller 12 is placed on the rolling rollers 24, 26, 28, the rolling rollers 24, 28 are inclined to a steady position where they are in line contact with the press roller 12 by receiving the force from the press roller 12. As shown in the figure, a predetermined gap is formed between the rolling rollers 24 and 28 and the corresponding contact portion 46a.
[0035]
The contact portion 46a of the restricting member 46 may be disposed corresponding to the range in which the truncated cone-shaped rolling roller swings, or may be disposed in a position beyond the swing range. In particular, in the latter case, the rolling rollers 24 and 28 surely follow and rotate with the rotation of the press roller 12 and also reliably swing with the following rotation and cause the press roller 12 to move in a predetermined direction. The action force to move toward is surely generated.
[0036]
As a result, while the warp sheets are wound around the beam 14, the rolling rollers 24 and 28 swing, but do not come into contact with the regulating member 46. Therefore, the rolling rollers 24 and 28 are not significantly worn and have a long life. become.
[0037]
As described above, the position of the contact portion 46a does not hinder the swinging motion of the rolling rollers 24 and 28, and the inclination of the rolling rollers 24 and 28 is restricted to an angular range in which the swinging motion can be generated. To be decided.
[0038]
Instead of using the contact portion 46a as the inner surface of the regulating member 46, another portion such as a protruding portion may be used. Instead of using the disc-shaped spacing piece as the regulating member, a contact portion may be formed at a predetermined location of each bracket 22 and the location may be used as the regulating member. An engaging member that contacts the frustoconical rolling roller may be arranged only when the press roller is mounted, and the regulating member may be removed after the press roller is mounted.
[0039]
Instead of disposing the restricting members on both sides of the truncated cone-shaped rolling roller, they may be disposed on only one of the truncated cone-shaped rolling rollers. Instead of forming the contact portion on the side surface of the frustoconical rolling roller, it may be formed on the outer circumferential surface (rotating circumferential surface) of the frustoconical rolling roller. In any case, the restricting member is provided in the vicinity of the truncated cone-shaped rolling roller.
[0040]
The present invention can be variously modified without departing from the gist of the present invention, which is limited to the above embodiment.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a press roller driving apparatus according to the present invention. FIG. 2 is a view taken along line 2-2 in FIG. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Press roller drive device 12 Press roller 14 Warp beam 16 Winding surface 18 Beam flange 20 Pusher arm 22 Press roller bracket 24,28 Frustum-shaped rolling roller 26 Ring-shaped rolling roller 30,32,34 Support shaft 44 Spherical bearing 46 Regulating member 46a contact part

Claims (2)

And having at least two rolling rollers including at least one frustoconical rolling roller supported by a support shaft via a spherical bearing, and placing a press roller on the rolling roller, A press roller driving device that rotates and fluctuates the frustoconical rolling roller by rotation,
A restricting member having a contact portion with which the frustoconical rolling roller can come into contact, and a restricting member for restricting the inclination of the frustoconical rolling roller by the contact portion is provided in the vicinity of the frustoconical rolling roller. , Press roller drive device. 2. The contact portion according to claim 1, wherein the contact portion regulates an inclination of the frustoconical rolling roller within a range in which the rocking motion can occur without interfering with the rocking motion of the frustoconical rolling roller. Drive device.

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