JP3725590B2 - Arm type unreel device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an arm type unreel device. More specifically, the present invention relates to an arm type unreel device that allows a gripper to grip a sheet roll at a fixed position regardless of its diameter.
[0002]
[Prior art]
In the arm type unreel, as shown in FIG. 5, a gripping tool 23 is attached to a swinging arm 20 that is swung within a required range by a cylinder 19 so as to hold the core tube 22 of the sheet roll 21 from both sides and to support it freely. A structure in which the gripping tool 23 is moved up and down by the swinging motion of the arm 20 to align with the heart tube 22 of the sheet roll 21 having different diameters is well known.
[0003]
[Problems to be solved by the invention]
However, when the gripping tool 23 is aligned with the heart tube 22 only by swinging the swing arm 20, if the swing arm 20 is swung from the position indicated by the solid line in FIG. The position of the gripping tool 23 changes from the a position to the b position. For this reason, there is a problem that the supply position must be changed in the range of a to b in accordance with the size of the sheet roll 21.
The present invention has been made to solve the above-mentioned problems. The movement of the gripping tool in the front-rear direction caused by the swinging of the swinging arm is controlled by the operation lever interlocked with the swinging arm. It is an object of the present invention to provide an arm type unreel device that can be corrected by raising and holding the gripping tool in a fixed position so that the sheet roll can be always supplied in the fixed position regardless of the diameter .
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, an arm type unreel device according to the present invention is provided with a gripping tool that rotatably supports a sandwiching arm of a sheet roll from both sides to a swinging arm that swings within a required range. In an arm-type unreel device in which a gripping tool is moved up and down by a swinging motion of the arm and aligned with a heart tube of a sheet roll having a diameter difference , an operating stroke is swung on a mounting shaft of the swinging arm. By attaching an operating lever that matches the distance of the center movement of the gripping tool caused by movement, and connecting the tip of this operating lever and a fixed piece fixed to the base that supports the moving base with a connecting rod, the swing arm When There move the center of the sheet roll gripper swings, actuating lever and the center movement of the gripper and to perform correction of the position by moving the swing arm to the opposite direction in conjunction with this It is characterized by adopting formed.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of an arm type unreel device according to the present invention will be described below with reference to the drawings.
[0006]
1 to 3, reference numeral 1 denotes a pair of swing arms in an arm type unreel device. A pair of swing arms are attached to a shaft 4 supported by a bearing 3 attached to a movable table 2 at a predetermined interval. In addition, a gripping tool 7 is mounted so as to sandwich the heart tube 6 of the sheet roll 5 from both sides and rotatably support the sheet roll 5, and the gripping tool 7 is advanced and retracted by a cylinder 8.
[0007]
1 to 3, reference numeral 9 denotes a drive lever attached to both ends of the shaft 4. A clevis-type cylinder 10 is supported at the tip of the drive lever 9, and the rod 11 of the cylinder 10 is moved. When the cylinder 10 is operated by being connected to the base 2, the drive lever 9 is rotated to swing the swing arm 1 up and down within a required range by the shaft 4 and supported at the tip of the swing arm 1. The gripping tool 7 is moved up and down so that the gripping tool 7 can be reliably aligned with the heart tube 6 even if the height of the heart tube 6 changes depending on the diameter of the sheet roll 5.
[0008]
1 to 3, reference numeral 12 denotes a slide bearing attached to the lower side of the movable table 2. As is well known, a circulating ball row (not shown) is mounted and this ball row is mounted on the base 13. By moving the rail surface in contact with the straight rail 14 and rolling it, the heavy-weight moving platform 2 can be moved easily with a small force.
[0009]
In FIG. 1 to FIG. 3, symbol S indicates a correction means for correcting a change in the position of the gripping tool 7 in the front-rear direction accompanying the swing of the swing arm 1. As shown in FIG. 4A, the operation lever 15 is mounted at an angle substantially perpendicular to the arm 1 and the connecting rod 17 connects the fixed piece 16 erected on the base 13 so as to correspond to the operation lever 15. Further, the operation step D of the operation lever 15 is set with the distance C of the center movement of the gripping tool 7 caused by the swing of the swing arm 1 set equal. Then, when the swing arm 1 is swung from the position indicated by the solid line in FIG. 4A to the position indicated by the chain line, if the operating lever 15 is free, it is rotated from the position of the solid line in FIG. To do. However, the tip of the operating lever 15 does not move because it is connected to the fixed piece 16 by the connecting rod 17 as shown in FIG. 4B. Accordingly, the actuating lever 15 rotates about the connecting shaft 18 with the connecting rod 17 as shown by a chain line in FIG. 4B, and the shaft 4 and the swing arm 1 are moved toward the sheet roll 5 to bring the swing arm 1 into position. The center of the gripping tool 7 supported at the tip is aligned with the gripping position a of the sheet roll 5. Further, when the swing arm is swung from the position indicated by the chain line in FIG. 4A to the position indicated by the solid line, the rotating force opposite to the above is applied to the operating lever 15, so that the operating lever 15 is connected to the connecting rod 17. 4C, the shaft 4 and the swing arm 1 are moved away 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 is performed in accordance with the gripping position a.
[0010]
The arm-type unreel device having the above-described configuration grips the small-diameter sheet roll 5 as shown in FIG. 3 from the position where the swing arm 1 is horizontally raised to grip the large-diameter sheet roll 5 as shown in FIG. Therefore, when the rocker is swung to an inclined position, the means A for correcting the change in the position of the gripping tool 7 is actuated to move the rocking arm 1 back and forth. Since the change in the position of the gripping tool 7 in the front-rear direction that is caused by the movement is corrected, the gripping tool 7 is always held at a constant gripping position a even if the height thereof is changed. Regardless of the size of the diameter, the fixed position may be supplied so that the center of the heart tube 6 coincides with the grasping position a.
[0011]
As described above, in the arm type unreel device according to the present invention, when the swing arm swings and moves the center of the sheet roll gripping tool, the operating lever moves the swing arm and moves the center of the gripping tool in conjunction with this. Moves in the opposite direction so that the center of the gripping tool is always held at a fixed position, so the arm type unreel device is added with three members, a connecting rod that connects the operating arm and the fixed piece. It has an excellent effect that the object can be achieved without consuming extra power with a simple structure.
[Brief description of the 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 above.
FIG. 3 is a side view showing a state where a sheet roll having a small diameter is gripped in the embodiment.
FIG. 4 is an explanatory diagram showing an operation 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 Swing arm 5 Sheet roll 6 Cardinal tube 7 Grasping tool S Grasping tool position correction means

Claims (1)

A gripping tool that rotatably supports the sheet roll by sandwiching the core tube of the sheet roll from both sides is attached to the swinging arm that swings within the required range, and this gripping tool is moved up and down by the swinging motion of the arm. In the arm-type unreel device that aligns with the cardinal tube of the sheet roll with a difference,
Attach an operating lever on the mounting shaft of the swinging arm according to the distance of the center movement of the gripping tool caused by the swinging of the swinging arm,
By connecting the tip of this actuating lever and the fixed piece fixed to the base supporting the moving base with a connecting rod,
When the swing arm swings and moves the center of the sheet roll gripping tool, the operating lever moves in the opposite direction to the center movement of the gripping tool to correct the position. arm-type Anriru and wherein the the <br/> thing.

Images