JPH0967048A - Arm type unreel device - Google Patents

Abstract

(57) [Summary] [Object] The present invention moves the swing arm so as to correct the back-and-forth movement of the gripping tool due to the swing of the swing arm, so that the supply of the sheet roll can be controlled. (EN) Provided is an arm-type unreel device that can be always placed at a fixed position regardless of size. [Structure] A gripping tool 7 that clamps a core tube 6 of a sheet roll 5 from both sides and rotatably supports the rocking arm 1 is swung in a required range, and the gripping tool 7 swings the arm 1. In an arm type unreel device that moves up and down by dynamic motion to align with the core tube 6 of the sheet roll 5 having a diameter difference, the swing arm 1 is placed on a moving table 2 that moves in the front-back direction, When the gripping tool 7 is moved back and forth on the moving arm 1 by its swinging, the position correcting means S moves the swinging arm 1 in the opposite direction by the moving distance.
To work together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arm type unreel device. More specifically, the present invention relates to an arm type unreel device that allows a gripping tool to grip a sheet roll at a fixed position regardless of its diameter.

[0002]

2. Description of the Related Art In an arm type unreel, as shown in FIG. 5, a core tube 22 of a sheet roll 21 is clamped from both sides by a rocking arm 20 which is rocked within a required range by a cylinder 19 so as to be rotatably supported. The gripping tool 23 is attached, and the gripping tool 23 is moved up and down by the swinging motion of the arm 20, and the core tube 2 of the sheet roll 21 having different diameters is used.
A configuration for aligning with the position 2 is well known.

[0003]

However, when the gripping tool 23 is aligned with the core tube 22 only by swinging the swing arm 20, the swing arm 20 moves from the position shown by the solid line to the position shown by the chain line in FIG. When swinging, the gripping tool 2
The position of 3 changes from the a position to the b position. Therefore, depending on the size of the diameter of the sheet roll 21, its supply position is set to a.
There is a problem that it must be changed in the range of b. The present invention has been made to solve the above-mentioned problems, and corrects the front-back movement of the gripping tool caused by the swinging of the swinging arm by the correction means to hold the gripping tool in a fixed position. An object of the present invention is to provide an arm type unreel device that can always supply a sheet roll to a fixed position regardless of its diameter.

[0004]

SUMMARY OF THE INVENTION An arm type unreel device according to the present invention comprises a gripping tool that rotatably supports a core tube of a sheet roll from both sides by a swing arm that swings in a required range. In an arm type unreel device for mounting and moving the gripping tool up and down by the swinging motion of the arm to align with the core tube of a sheet roll having a diameter difference, the swinging arm is used as a moving table for moving in the front-back direction. A configuration is employed in which the swing arm is mounted and position correction means is linked to move the swing arm in the opposite direction by the moving distance when the gripper is moved in the front-back direction by the swing. It is a feature.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an arm type unreel device according to the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 indicates a pair of swing arms in an arm type unreel device,
A grip for attaching the pair of shafts 4 supported by bearings 3 attached to the moving base 2 at a predetermined interval, and holding the core tube 6 of the sheet roll 5 from both sides at its tip to rotatably support the sheet roll 5. The tool 7 is attached, and these gripping tools 7 are moved forward and backward by the cylinder 8.

1 to 3, reference numeral 9 indicates a drive lever attached to both ends of the shaft 4, and a clevis-type cylinder 10 is supported at the tip of the drive lever 9.
When the rod 11 of the cylinder 10 is connected to the moving base 2 and the cylinder 10 is operated, the drive lever 9
Is rotated to swing the swinging arm 1 up and down within a required range by the shaft 4, and the gripping tool 7 supported by the tip of the swinging arm 1 is moved up and down to increase or decrease the diameter of the sheet roll 5. Even if the height of the heart tube 6 is changed by the grasping tool 7 to the heart tube 6.
Is sure to be aligned.

1 to 3, reference numeral 12 denotes a slide bearing attached to the lower side of the movable table 2, which is equipped with a circulating ball row (not shown) as is well known, and this ball row is used as a base 13. Straight rail 1 mounted on top
4 and rolling movement of the rail surface allows the heavy moving base 2 to be moved lightly with a small force.

1 to 3, reference numeral S indicates a correction means for correcting a change in the position of the gripping tool 7 in the front-rear direction due to the swing of the swing arm 1. 4A is constituted by an operating lever 15 attached at an angle substantially orthogonal to the swinging arm 1 and a connecting rod 17 for connecting a fixed piece 16 standing upright on the base 13 so as to correspond to the operating lever 15. As shown in FIG. 3, the operation step D of the operation lever 15 is performed by the swinging motion of the swinging arm 1.
The center moving distance C is set to be equal and placed. Then, when the swing arm 1 is swung from the position shown by the solid line in FIG. 4A to the position shown by the chain line, and if the operating lever 15 is free, it is turned from the position shown by the solid line in FIG. To do. However, the tip of the operating lever 15 is not moved because it is connected to the fixed piece 16 by the connecting rod 17 as shown in FIG. 4B. Therefore, the operating lever 15 is connected to the connecting rod 17
4B is rotated about the connecting shaft 18 for connecting the shaft 4 and the swinging arm 1 to the sheet roll 5 side to support the gripping tool 7 supported at the tip of the swinging arm 1. The center is aligned with the gripping position a of the sheet roll 5. Further, when the swing arm is swung from the position shown by the chain line in FIG. 4A to the position shown by the solid line, the turning force opposite to the above acts on the operating lever 15, so that the operating lever 15 is connected to the connecting rod 17. Axis 1
8C as shown in FIG. 4C, the shaft 4 and the swing arm 1 are separated from the sheet roll 5, and the center of the gripping tool 7 supported by the tip of the swing arm 1 is moved to the sheet roll 5 side. The gripping position a is adjusted.

The arm type unreel device having the above-described structure is configured such that the swinging arm 1 is horizontally raised to grip the large diameter sheet roll 5 as shown in FIG. 1 and the small diameter sheet roll as shown in FIG. When 5 is swung to a tilted position for gripping, the means A that corrects the change in the position of the gripping tool 7 is actuated by this swinging to move the swing arm 1 back and forth, By correcting the change in the position of the gripping tool 7 in the front-rear direction, which is likely to occur with the swing of 1,
Since the gripping tool 7 is always held at the constant gripping position a even if its height changes, the seat roll 5 is fixed at a fixed position so that the center of the heart tube 6 is aligned with the gripping position a regardless of the diameter of the sheet roll 5. It would be good to supply it.

As described above, in the arm type unreel according to the present invention, even if the position of the gripping tool is changed back and forth due to the swinging of the swinging arm, this change is corrected by the correcting means to keep the gripping position constant. The sheet roll is always fed to a fixed position regardless of the diameter of the sheet roll so that the sheet roll can be gripped easily and reliably.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a sheet roll having a large diameter is gripped in an embodiment of an arm type unreel according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view showing a state in which a sheet roll having a small diameter is gripped in the above embodiment.

FIG. 4 is an explanatory diagram showing an operating principle of the sheet roll gripping tool in the embodiment.

FIG. 5 is a side view showing a conventional arm type unreel device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rocking arm 5 sheet roll 6 core tube 7 gripping tool S gripping tool position correcting means

Claims (1)

[Claims] 1. A gripping tool that rotatably supports a core tube of a sheet roll from both sides is attached to a swinging arm that swings within a required range, and the gripping tool is moved up and down by a swinging motion of the arm. In an arm-type unreel device for moving to, and aligning with the core tube of a sheet roll having a diameter difference, the swing arm is mounted on a moving table that moves in the front-rear direction,
An arm type unreel characterized in that the swing arm is associated with position correcting means for moving the swing arm in the opposite direction by the moving distance when the gripper is moved in the front-back direction. apparatus.