JPH0530041Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device for controlling the attitude of roll base paper in a mill roll stand.

[Conventional technology]

In order to set roll paper, etc. on a mill roll stand that supplies liner and base paper (hereinafter referred to as base paper, etc.) to a corrugating machine that manufactures corrugated board,
Generally, a conveying device for roll base paper or the like is provided in a direction perpendicular to the center line of a corrugating machine including a mill roll stand. This conveyance device uses an endless chain to drive a trolley running on rails embedded in the floor surface, and conveys the roll base paper etc. from the loading position of the roll base paper etc. to the central position of the mill roll stand.

The roll paper, etc. that has been conveyed to the vicinity of the center of the mill roll stand is held by the arms of the mill roll stand and lifted up to a predetermined height, but in order to grip the roll paper, etc. with the arms, the arms must be lowered and the rolls removed. The roll pin of the arm must be aligned with the paper tube position at the center of the base paper, etc.

However, roll base paper has various diameters depending on its use and type, and if the arm whose tip moves in an arc is simply rotated and lowered, the roll pin of the arm will not be at the paper core position of the roll base paper. It does not match.

Therefore, in order to match the positions of the two, we not only rotated and lowered the arm whose tip moves in an arc, but also used a lift to lift the trolley on which the roll base paper, etc. was placed, at a predetermined center position of the mill roll stand. Automatic loading device for base paper was published in Japanese Patent Application Publication No. 1973-
This is proposed in Publication No. 55906.

Moreover, in this known device, the diameter of the roll base paper is divided into stages, and a limit switch or the like is used to control the amount of rotational descent of the arm and the amount of lifting of the trolley in stages according to the diameter divided into stages. It only controls.

[The problem that the idea attempts to solve]

By the way, when a roll base paper, etc. is transported to a mill roll stand by a transport device, when the roll base paper, etc. is placed on a trolley at the carry-in position, the axis center line of the roll base paper, etc. is generally slightly oblique to the conveyance center line. There are many things. However, the automatic loading device disclosed in the above-mentioned publication simply moves the roll base paper up and down with a trolley, and does not control the posture of the roll base paper or the like against twisting of its axis.
Therefore, it is assumed that the posture of the roll base paper is controlled by a manual operation. However, it is extremely difficult to control the posture of a roll of base paper, etc. when the diameter of the roll of base paper becomes large, since it is impossible for the human eye to accurately confirm how far the center line has deviated. For this reason, in general, the arm is lowered to near the paper core position of the roll base paper, and a person manually pushes the very heavy roll base paper to align the roll pin of the arm with the paper core position of the roll base paper, and gradually lowers the arm. It's moving up and down. Therefore, it takes considerable effort and time to match the positions of the two, which is extremely inefficient.

In addition, as in the above publication, it is difficult to simply control stepwise the amount of rotational descent of the roll pin of the arm that draws an arc trajectory and the amount of lifting of the trolley on which the roll base paper is placed. There is also the disadvantage that it is difficult to match exactly.

This idea was made in view of the current state of the technology of the device that automatically attaches roll base paper to the conventional mill roll stand mentioned above, and its purpose is to correct the posture of roll base paper and to adjust the roll pin position of the mill roll stand arm. An object of the present invention is to provide a roll base paper posture control device that can automatically drive and control everything to accurately match the roll base paper to the paper core position.

[Means to solve the problem]

Therefore, in this invention, as a means to solve the above problem, an arm drive unit that rotationally drives a pair of arms that sandwich the roll base paper in the mill roll stand, and a conveying device that supplies the roll base paper to the mill roll stand. The pusher is equipped with a lift that raises and lowers one end of the base paper support plate, and an attitude correction roller that is installed at the base of the mill roll stand and that corrects the attitude of the rolled base paper that moves when the lift tilts the base paper support plate and pushes it back to a predetermined position. the push-back device; Performing a predetermined calculation in response to a signal from a detector that detects the amount of movement and an operation start signal for lowering the arm, and applying a signal based on the calculation result to the arm driving section to lower the arm by a predetermined amount; The configuration of the roll base paper posture control device is such that the push-back device is applied to push back the posture correcting roller by a predetermined amount so that the roll pin position of the arm matches the center hollow portion of the roll base paper.

[Effect]

In the roll paper posture control device of this invention configured as described above, when the roll paper is sent to the center of the left and right arms of the mill roll stand and set, the position detection signal is sent to the electrical control of this control device. Serves as a control operation start signal to the circuit.

When the operation start signal is input to the electric control circuit, an output signal is first sent to the arm drive unit to lower the arm, and the arm is lowered from the upper limit standby position. During the arm's descent, the photoelectric detection signal installed at the center of the arm's roll pin is blocked.
The arm angle corresponding to the diameter of the roll base paper is calculated from this light shielding signal and the signal from the arm angle detector. Then, the arm lowering amount is calculated based on the arm angle corresponding to the diameter of the roll base paper, and based on this calculation result, the arm descends to the height of the paper core position of the roll base paper and stops at that position.

When the light blocking signal is detected, a drive signal for raising the lift is simultaneously output based on the signal. For this reason, one end of the base paper support plate is lifted and tilted, and the rolled base paper rolls toward the push-back device in the standby position, and the rolling movement force and the posture of the push-back device installed parallel to the conveyance center The correction roller corrects the twist in the orientation of the roll base paper. Also, during the above operation, the push-back device moves back from the standby position based on the signal corresponding to the diameter of the roll base paper in response to the light shielding signal command until the roll pin, which is lowered by a predetermined amount, matches the center position of the roll base paper. The amount of movement to be made is calculated, and when the roll base paper comes into contact with the push-back device, the roll base paper is pushed back by this amount of movement after the twist is corrected, and the roll pin of the arm and the hollow part of the paper tube of the roll base paper match. At this time, light is passed through the photoelectric detection device through the hollow part of the paper tube, and when the movement is stopped, the roll base paper can be held between the arms.

〔Example〕

Embodiments of this invention will be described below with reference to the attached drawings.

FIG. 1 shows an overall schematic block diagram of the roll paper posture control device of this embodiment.

Arm 2 of mill roll stand 1 as shown
A roll base paper S is fed to the center position by a base paper support plate 3 of a conveying device (described later). When the rolled base paper S is tilted by a lift 4 that raises and lowers one end of the base paper support plate 3, it rolls and moves toward the push-back device 5. The push-back device 5 includes a posture correcting roller 6, a traveling roller 6', a hydraulic cylinder 7, a rack 8, etc. (see FIG. 2).
Further, the arm 2 is rotated by the arm drive unit M so that its tip draws an arcuate trajectory, and the arm 2 is rotated by the arm drive unit M so as to clamp the roll base paper S and lift it to a predetermined height position. The rotation angle is detected via the pulley 9, and the amount of movement of the push-back device 5 is detected via the pinion 9'.

The arm drive section, lift 4, and push-back device 5 are controlled by an electric control circuit 20. The electric control circuit 20 includes an automatic loading control section 21, an arm angle calculation section 22 that calculates the angle of the arm 2 corresponding to the diameter of the roll base paper, an arm lowering amount calculation section 23 that calculates the arm lowering amount from the arm rotation angle, Push-back device position calculation unit 24 that calculates the amount of movement of the push-back device 5
etc.

For this electric control circuit 20, a photoelectric detection device 11 provided at the center of the roll pin 2' at the tip of the arm 2, a pulse generator 12 that detects the rotation angle of the arm 2 via a pulley 9,
A pulse generator 13 is provided which detects the amount of movement of the push-back device 5 via a pinion 9'.

Note that the rotation angle of the arm 2 and the push-back amount of the push-back device 5 may be detected using other detection means such as a potentiometer.

FIG. 2 is a detailed diagram showing the relationship between the push-back device 5 provided in the mill roll stand 1, the paper support plate 3 of the transport device T for the roll paper S, and the lift 4.
The conveying device T is driven to run on a running rail provided on the underside of the floor (in a direction perpendicular to the plane of the paper) by an endless chain (not shown).

FIG. 3 is a plan view showing the vicinity of the mill roll stand in FIG. 2. The conveyance device T is conveyed in a direction perpendicular to the arms 2 of the mill roll stand along the conveyance center line transport.

In this embodiment configured as described above, when the roll base paper is sent to the center position of the pair of arms 2, 2 of the mill roll stand 1 by the conveying device T, the roll base paper is set at the center position. The lowering operation of the arms 2, 2 is started by the operation start signal based on the signal detected. The subsequent operation will be explained mainly with reference to FIG. 5 and FIG. 1.

First, when the operation start signal is sent to the automatic mounting control section 21 of the electric control circuit 20, the arms 2, 2 rotate downward from the arm upper limit standby position shown in figure a, and b
As shown in the figure, the roll pin 2'
The roll base paper is detected by a photoelectric detection device 11 provided at the center of the paper. This light blocking signal is sent to the automatic loading control section 21, and based on this signal, the angle of the arm 2 corresponding to the diameter of the roll base paper S is calculated in the arm angle calculation section 22, and a signal based on this calculation result is sent to the arm 2. It is output to the descending amount calculation section 23. Further, based on this signal, the arm lowering amount calculation section 23 calculates the rotation angle at which the arm 2 should be lowered to the height of the paper tube cavity of the roll base paper S, and a signal based on this calculation result is sent to the automatic loading control section 23. Output to. Then, based on this signal, a control signal is sent from the automatic loading control section 21 to the arm driving section M, and the arms 2, 2 are lowered to the height of the paper tube cavity of the roll base paper S, resulting in the state shown in Figure c. .

Furthermore, when the light blocking signal is detected, a signal for driving the lift 4 is sent to the automatic mounting control section 2.
1, and the lift 4 is raised as shown in figure c. For this reason, the roll base paper S rolls to the right in the figure and comes into contact with the posture correction roller 6 of the push-back device 5, so that the rolling movement force and the roller 6 correct the twist in the posture of the roll base paper.

Furthermore, the signal corresponding to the diameter determined by the arm angle calculation unit 22 is transmitted to the push-back device position calculation unit 2.
4, and the push-back device position calculation unit 24 determines the amount of movement that the push-back device 5 should push back from the standby position until the roll pin 2', which is lowered by a predetermined amount, and the paper tube cavity of the roll base paper S coincide with each other. Calculated.

As a result of the above calculation, a signal corresponding to the amount of movement is sent from the automatic loading control unit 21 to the push-back device 5, and when the roll base paper S is pushed back by a predetermined amount, the roll base paper S is moved to the paper core position as shown in figure d. The roll pins 2' are aligned, the photoelectric detection device installed at the center passes light through the hollow part of the paper tube, the movement of the push-back device is stopped, and the roll base paper S is held between the arms 2, 2. Preparation is complete.

Next, as shown in Fig. e, the roll paper S is held and lifted by the arms 2, 2, and the paper becomes ready to be fed to the corrugating machine, and the lift 4 is lowered to its original position, and the push-back device 5 is returned to the standby position.

Paper feeding continues in this state, and when the feeding of the roll base paper is completed, the next new roll base paper S is set as shown in Figure a. In this way, the roll base paper is loaded a.
A series of operations are repeated through the operations shown in Figures 1 to 3e, and the loading of the roll base paper is performed automatically and reliably without any human intervention.

Next, a method for determining the arm angle and the center point of the rolled base paper in the control operation by the electric control circuit 20 will be explained with reference to FIG.

In FIG. 4, point a is the photoelectric detection device 11.
is a position where light is shielded, and point c is a previously known position in arm 2 of radius R, and the center of rotation O of arm 2
This is also a point that can be determined in advance in terms of design. Therefore, point O
Since the angle formed by the vertical line passing through and the line segment Oc is also known, when point a is detected, the angle Θ corresponding to the diameter of the roll base paper S is immediately calculated by the arm angle calculating section 22.
The point on the arc of radius R that corresponds to 1/2 of that angle is b. The diameter of the roll base paper is determined from the angle of Θ obtained in this way and its 1/2,
When the arm 2 is lowered, the final position of the paper tube cavity of the roll base paper that coincides with the roll pin 2' is calculated.

Furthermore, since the radius of the roll base paper S is determined by the angle Θ, and the standby position of the posture correction roller 6 is predetermined in design, it is necessary to align the paper tube cavity of the roll base paper S with point b. The amount by which the roll base paper S is pushed back by the push-back device 5 is determined.

Note that when measuring the angle of the arm 2 corresponding to the diameter of the roll base paper at the position of the roll base paper S in FIG. Although the angle of arm 2 is measured, the twist in the posture of the roll base paper within the normal range does not have a large effect on the error when measuring the angle of arm 2. Further, even if a slight error occurs due to this, the diameter (hollow portion) of the paper tube is about 3 inches (about 75 to 80 mm), so the center error can be absorbed by this.

〔effect〕

As explained in detail above, the roll paper posture control device according to this invention includes an arm drive unit, a lift that raises and lowers one end of the paper support plate with respect to the mill roll stand, a push-back device that corrects the attitude of the roll paper, and An electric control circuit is provided to control these, and the commands from this electric control circuit cause the lift to rise, the push-back device to move and press force to correct the posture of the roll base paper, and the detection device to adjust the diameter of the roll base paper when the arm lowers. The base paper is moved to a mill roll stand by detecting the angle of the corresponding arm, and sequentially controlling the arm lowering and push-back devices to move a predetermined angle and distance in order to match the roll pin position at the end of the arm with the paper core position of the roll base paper. Since the roll base paper can be positioned correctly against the base paper, all the work that previously had to be done manually, such as correcting the posture of the roll base paper and aligning the roll pin with the paper core position of the roll base paper, can now be done automatically and accurately. can.

[Brief explanation of drawings]

Fig. 1 is a general schematic block diagram of the roll paper posture control device according to this invention, Fig. 2 is a schematic configuration diagram showing the arrangement of the mill roll stand, push-back device, conveyance device, lift, etc., and Fig. 3 is the same as Fig. 2. Plan view of 4th
5 and 5 are diagrams each explaining the operation. 1... Mill roll stand, 2... Arm,
2'...Roll pin, 3...Base paper support plate, 4...
Lift, 5... Push-back device, 6... Posture correction roller, 11... Detection device, 12, 13... Pulse generator, 20... Electric control circuit, 21... Automatic mounting control section, 22... Arm angle calculation section, 23
. . . Arm lowering amount calculation section, 24 . . . Push-back device position calculation section.

Claims (1)

[Scope of utility model registration request] An arm drive unit that rotationally drives a pair of arms that sandwich the roll base paper in the mill roll stand, a lift that raises and lowers one end of the base paper support plate of the conveyance device that supplies the roll base paper to the mill roll stand, and a mill roll stand base. a push-back device equipped with a posture correction roller that corrects the posture of the roll base paper that moves when the base paper support plate is tilted by the lift and pushes it back to a predetermined position; and an electric control circuit. However, a signal from a detection device installed at the tip of the arm detecting the roll paper, a signal from a detector that detects the angle of the arm, a signal from a detector that detects the amount of movement of the push-back device, and a signal from the arm lowering are detected. Upon receiving the operation start signal, a predetermined calculation is performed, and a signal based on the calculation result is applied to the arm drive unit to lower the arm by a predetermined amount, and is applied to the push-back device to move the posture correction roller to a desired position. A roll base paper posture control device characterized in that the roll pin position of the arm is aligned with the central hollow part of the roll base paper by pushing back a certain amount.