JPS6232203Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the improvement of an expander roll, and more specifically, the present invention relates to an improvement of an expander roll, and more specifically, a sheet-like traveling object such as a traveling fabric, a traveling paper, a traveling film, etc. is passed through the roll over its entire width, and the roll is expanded. This relates to the improvement of a type of expander roll that increases the required width by expanding the width, and is mainly used in the field of fabric manufacturing technology.
It is used in the finishing process of sheet-like objects in the paper manufacturing technology field and the film manufacturing technology field.

Conventionally, this type of expander roll, which uses a single roll to widen the width of a sheet-like traveling object, has a curved shaft that is attached to an elastic tube such as a rubber tube through a plurality of rotors, as shown in Fig. 5. It consists of a curved roll that is fitted with a body, and its protruding arcuate surface extends the width of the sheet-like traveling object.
The area near the center of the running object is in close contact with the roll surface and tends to stretch due to the strong widening effect, while the area near both ends of the running object tends to float away from the roll surface, resulting in not only insufficient width. , there is a drawback that wrinkles are easily generated in this part, and it is difficult to prevent the central part of the running object wound up by the winding roll from expanding along the curved shape of the roll during the width expansion process. There are disadvantages that cause inconveniences such as:

The present invention was developed and completed in order to eliminate the above-mentioned drawbacks, and it can achieve an excellent width-widening effect evenly over the entire width of the moving object, and can reduce wrinkles near both ends of the moving object. The purpose of the present invention is to provide an expander roll that can reliably prevent the occurrence of such occurrence, and that can increase or decrease the amount of width as desired by a simple means. A plurality of rotors are sequentially arranged symmetrically from the left and right sides while maintaining the required gradually increasing inclination angle, and an elastic cylinder such as a rubber cylinder is fitted on the arranged rotors to form a straight shaft. The elastic tube is constructed in a roll shape, and as a result of the rotation of each rotor, the elastic cylinder can be expanded and contracted symmetrically in the width direction from the intermediate portion toward both sides, and the shaft can be moved to an appropriate position. The present invention relates to an expander roll that is configured to be rotatable so that the width-extending action of the roll can be increased or decreased.

The expander roll according to the present invention configured as described above operates as follows. With the shaft fixed to the machine frame, when a sheet-like traveling object is passed through the roll and the roll is rotated by the running force, the elastic cylinder of the roll is moved to the outermost inclined peripheral edge of the array rotor. It is maximally stretched toward both sides of the roll at the center of the rotor, and contracted minimally toward the center of the roll at the inwardly inclined periphery of the array rotor, thus creating a gradual stretching effect. Since the small contraction action is repeated, the running object is set to pass from the vicinity of the minimum contraction part to the maximum extension part, so that the running object is subjected to the maximum expansion action during that time. Also,
Since the roll is formed in a straight shape, this widening action is performed evenly over the entire width of the running object in a state where the entire width is in contact with the roll surface.

Next, an embodiment of the present invention will be described based on the attached drawings. 1 is a straight shaft, and R is a non-slip strip on the circumferential surface rotatably mounted on the shaft via a bearing 2. A plurality of rotors having grooves, in this embodiment, a rotor Ro is mounted perpendicularly to the axial direction in the middle part of the shaft 1, and the rotor Ro is rotated on both left and right sides around the rotor Ro. Child
R ₁ to _{R 5} are arranged and mounted symmetrically with a spacer 3 at a predetermined interval and sequentially inclined at a required angle, for example, in an increasing angle once at a time. 4
is an elastic cylinder such as a rubber cylinder, and by tightly fitting this cylinder to the arranged rotors described above as shown in Fig. 1, the arrangement of the rotors can be made as shown in Fig. 1. , the upper elastic cylinder part 4A is stretched to the maximum in the roll width direction, the lower elastic cylinder part 4B is minimized in the roll width direction, and the middle elastic cylinder part 4A is stretched to the maximum in the roll width direction. The body portion 4C is tightly fitted into the rotor in a non-expandable state, thus forming an expander roll having a trapezoidal front shape with a long upper side and a short lower side.

The expander roll configured as described above has its shaft 1 fixed to the machine frame and, for example, the second
As shown in the figure and FIG. 3, the point P ₁ where the elastic cylinder 4 is stretched to the maximum is located right next to the delivery side of the running object S, and the running object S is placed on the guide roll 5,
At this time, the roll is rotated together with each rotor by the running force of the running object S, but the elastic cylindrical body 4 is As the child rotates, it rotates while expanding and contracting symmetrically in the width direction from the middle part on both sides, so that the elastic cylinder 4 is hung from around the point P ₃ where it contracts to the minimum as described above. The running object S is gradually subjected to a widening action from point P ₃ through point P ₂ to point P ₁ , and is subjected to the maximum widening action when passing near point P ₁ . At this time, since the running object S is in contact with the roll surface over its entire width, it is uniformly subjected to the widening action over its entire width.

In addition, in the above-mentioned state where the running object is hooked through, as schematically shown in FIG. By positioning the point P ₁ directly below the point P 1 that is stretched, the roll extension action can be significantly reduced, and by appropriately rotating the shaft 1 in this way, the roll extension action can be increased or decreased as appropriate. It is possible.

As detailed above, according to the expander roll according to the present invention, compared to the conventional curved expander roll, the width of the sheet-like traveling object can be achieved much more evenly over the entire width, and both sides of the traveling object can be expanded evenly over the entire width. There is no wrinkling on the rolls, and therefore the winding condition of the running object can be significantly improved, and the widening action of the rolls can be increased or decreased as desired by the simple means of rotating the shaft appropriately. It can be effective.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a front view taken longitudinally of the main parts, Fig. 2 is a plan view showing an example of the usage state, Fig. 3 is a right side view thereof, and Fig. 4 is a front view of the main part. FIG. 5 is a front view of a conventional curved expander roll. 1... Straight shaft, 2... Bearing,
R...rotor, 4...elastic cylinder.

Claims (1)

[Scope of utility model registration request] A plurality of rotors are sequentially arranged symmetrically from the middle part of the straight shaft toward both left and right sides while maintaining the required gradually increasing inclination angle, and elastic tubes such as rubber tubes are attached to the arranged rotors. The body is fitted into a straight roll shape, and the elastic cylindrical body is configured to be able to expand and contract symmetrically in the width direction from the intermediate portion toward both sides by the rotation of each rotor. An expander roll characterized in that the shaft is configured to be rotatable to an appropriate position so that the width-extending action of the roll can be increased or decreased.