JP3059439B1 - Circular saw height adjustment device for log paper cutting device - Google Patents

Abstract

The height position of a circular saw of a log paper cutting device can be automatically and accurately adjusted, and the production cost is reduced and the adjustment is automated by labor saving of an operator for adjusting the height position. To improve the operation rate. A swing arm holding a bearing of a rotary shaft of a rotor arm having a circular saw attached to both ends at a central portion.
An arm up / down movement device 30 that rotatably holds the base end portion 21 at a fixed position, supports the tip end of the swing arm movably in the vertical direction, and automatically adjusts the height, and a swing arm Lock device 40 that automatically controls whether the tip of the
And a height control device for comprehensively controlling the lock device and the arm vertical movement device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular saw height adjusting device for a log paper cutting device. The log paper is obtained by winding the paper into a log shape, and when this paper is cut into a predetermined length, it becomes toilet paper or kitchen roll paper. Generally, paper made by a paper machine is wide and is wound by a winder as it is to a large diameter (about 2 to 4 m in diameter). The large-diameter roll paper is rewound to a small diameter (110 to 120 mm for toilet paper, 110 to 130 mm for kitchen roll paper, etc.), and the log paper is a long one having a small diameter. . A log paper cutting device cuts this log paper at intervals of 100 to 114 mm to make toilet paper, or cuts it at intervals of about 220 to 230 mm to finish it as kitchen roll paper.

[0002]

2. Description of the Related Art As a conventional log paper cutting apparatus, there is one disclosed in Japanese Patent Application Laid-Open No. 4-209156. The basic structure thereof will be described with reference to FIG. Reference numeral 101 denotes two circular saws, which are rotatably attached to the tip of a rotor arm 102, and are rotated at high speed by a motor or the like. The rotor arm 102 is rotatable about an axis 103,
It is designed to be rotated by a motor or the like. Thus, the circular saw 101 revolves while rotating. The log paper R is cut by the circular saw 101 which rotates while revolving. If this circular saw is used without polishing, the cut surface of the log will be deteriorated and the work efficiency will be inferior. Therefore, a circular saw for polishing the rotating cutting edge (outer peripheral portion) with a grindstone while using the circular saw. The polishing device is incorporated in the log paper cutting device. By the way, the diameter of the circular saw gradually decreases as the cutting edge is polished during the use of the circular saw, which hinders the cutting of the log paper R. Therefore, it is necessary to adjust the height position of the circular saw downward.

Conventionally, as an adjusting device for this purpose, one end of a swing arm that rotatably holds a shaft 103 of a rotor arm 102 is rotatably held and fixed, and the tip end of the swing arm is fixed. A lock mechanism, such as a lock bolt, which is movably supported in the vertical direction and can lock and hold the tip of the swing arm, is provided. At the time of adjustment, the tip of the swing arm can be moved up and down (accurately so as to draw an arc-shaped trajectory) by manual operation.
The height position of the (circular saw revolving shaft) can be adjusted, and when the adjustment is completed, the lock bolt is locked by manual operation.

[0004]

However, the prior art has the following problems. (1) When adjusting the height position of the circular saw, delicate adjustment is performed by manual operation, so that a skilled operator requires human labor and is troublesome. (2) When it is necessary to adjust the height position of the circular saw, it is necessary to stop the operation of the log paper cutting device and make the adjustment.However, since the adjustment is performed manually, it takes a long adjustment time. , The operation rate decreases, and the production cost increases.

In view of such circumstances, the present invention can automatically and accurately adjust the height position of a circular saw, thereby reducing production costs and saving automation by reducing the number of operators for adjusting the height position. It is an object of the present invention to provide a circular saw height adjusting device of a log paper cutting device capable of improving the operation rate by the above.

[0006]

According to the first aspect of the present invention, there is provided a circular saw height adjusting device for a log paper cutting device, comprising: (a) a rotor arm whose center is held by a rotating shaft and driven to rotate; A circular saw height adjusting device incorporated in a log paper cutting device, comprising: a circular saw for cutting log paper, which is rotatably mounted on both ends and driven to rotate at a high speed; A swing arm holding a bearing of the rotating shaft at a central portion and a base end rotatably held; and (c) supporting a tip end of the swing arm movably in the vertical direction and having a height. An arm vertical movement device for automatically adjusting; (d) a lock device for restraining or releasing the movement of the tip of the swing arm; and (e) comprehensive control of the lock device and the arm vertical movement device. Height control device And it features. The circular saw height adjusting device of the log paper cutting device according to the second aspect is the invention according to the first aspect, wherein the arm vertical movement device is (c1) a screw rod attached to the swing arm and oriented vertically. And (c2) a nut attached to the swing arm and screwed with the screw rod, and (c3) a lower end of the screw rod disposed and fixed below the swing arm. And a screw rod support base that supports the screw rod at a fixed height position. The circular saw height adjusting device of the log paper cutting device according to claim 3 is the invention according to claim 1 or 2, wherein the lock device is (d1) a lock fixing device disposed and fixed near the swing arm. A table and a second motor; (d2) a lock bolt having a tip part horizontally penetrating a part of a guide hole formed in the tip part of the swing arm in a vertical direction; A drive transmission mechanism for rotating by the output of the second motor; and (d4) a lock nut screwed to a tip end of the lock bolt, wherein the lock nut is fastened to a lock fixing base and the rocking is performed. A lock state in which the arm is clamped or an unlock state in which the tip of the swing arm is allowed to move by loosening the lock nut with respect to the lock fixing base is set. The circular saw height adjusting device of the log paper cutting device according to the fourth aspect is the invention according to the third aspect, wherein the height control device is arranged (e1) slightly above a proper position through which the cutting edge of the circular saw passes. And (e2) a motor control circuit that drives and controls each of the motors based on the detection output of the proximity switch.

According to the first aspect of the present invention, the height of the circular saw is adjusted by vertically moving the distal end of the swing arm holding the base end rotatably by the arm vertical movement device. With the locking device, it is possible to control whether or not the tip of the swing arm can be moved, and these can be automatically operated by the height control device. Therefore, when adjusting the height position of the circular saw, the height position of the circular saw can be automatically and accurately adjusted in a short time without requiring a manual operation by a skilled operator, thereby reducing production costs. ,
The operation rate can be improved. According to the invention of claim 2, since the arm vertically moving device screw-engages the screw rod and the nut, it is possible to finely adjust the fine feed of the screw rod and, consequently, the height of the swing arm. Further, the height of the swing arm holding the rotor arm and the heavy object of the circular saw can be adjusted by a small horsepower drive source. According to the third aspect of the present invention, the locking device clamps the swing arm between the lock nut screwed to the lock bolt and the lock fixing base by the rotation of the motor, so that the lock device can swing with a large locking force. The moving arm can be securely locked. According to the invention of claim 4, the height control device detects whether or not the height position of the circular saw is within the set range by the proximity switch, and based on the detection output, the motor of the arm vertical movement device and the motor. Since the drive of the motor of the lock device is automatically controlled, the circular saw can be automatically and always held at an appropriate position.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a log paper cutting device provided with a circular saw height adjusting device according to a first embodiment of the present invention. FIG. 2 is a front view of the log paper cutting device and the circular saw height adjusting device.

Referring to FIG. 1 and FIG.
The center of 11 is held by a rotating shaft 12 provided in the horizontal direction, and the rotating shaft 12 is rotatable in a vertical plane by being rotated by a motor or the like. The two circular saws 14 are rotatably mounted on shafts 13 which are rotatably held at both ends of the rotor arm 11 in the horizontal direction, respectively. It is rotatable in the plane. Therefore, the two circular saws 14 can rotate (rotate) at high speed in a vertical plane while rotating (revolving) by the rotor arm 11.

On the other hand, for example, two log papers R are placed on the transfer table 10 in parallel, and are conveyed in the horizontal direction.
Is intermittently clamped below the lower part. In a state where the log paper R is clamped, the operation of cutting the product (such as toilet paper) P of a fixed length by the circular saw 14 which rotates while revolving as described above is repeated. While using such a circular saw 14, a circular saw polishing device 15 for polishing the rotating cutting edge (outer peripheral portion) with a grindstone is provided. Then, as the cutting edge is polished by the circular saw polishing device 15 during use of the circular saw 14, it becomes impossible to cut the log vapor R in which the diameter of the circular saw 14 gradually decreases, so that the height position of the cutting edge of the circular saw 14 is automatically set. A circular saw height adjusting device is provided for adjusting the height.

FIG. 3 is an enlarged partial front view of the circular saw height adjusting device in FIG. FIG. 4 is an enlarged partial plan view of the circular saw height adjusting device in FIG. 2 to 4, the swing arm
21 is a bearing 12a of the rotating shaft 12 of the rotor arm 11.
Is held at a central portion, a base end portion is rotatably held by a fixed member by a shaft support portion 21a, and a distal end portion is swingable as shown by an arrow a in FIG. Then, while moving the tip of the swing arm 21 in the vertical direction (accurately to draw an arc-shaped trajectory), the arm vertically moving device 30 for automatically adjusting the height, and the swing arm 21 A lock device 40 for controlling whether or not the distal end portion can be moved, and a height control device for comprehensively controlling the lock device 40 and the arm vertically moving device 30 are provided.

As shown in FIGS. 3 and 4, the arm vertically moving device 30 includes a screw rod 31 disposed so as to vertically penetrate an intermediate portion of the swing arm 21 and a second screw rod 31 for rotating the screw rod 31. A motor 32, a nut 33 attached to an intermediate portion of the swing arm 21 and a part of the screw rod 32 screwed therein, and a nut 33 disposed below and fixed to the swing arm 21; A screw rod support 34 which is in contact with the lower end and supports the screw rod 31 at a fixed height.

The operation of the arm lifting / lowering device 30 having the above structure is as follows.
In accordance with the forward / reverse rotation of the first motor 32, the screwing position between the screw rod 31 and the nut 33 moves up and down, the swing arm 21 moves up and down, and adjusts the height position at the center. The rotation speed of the screw rod 31 is determined by a proximity switch provided near the upper end of the screw rod 31.
Detected at 56, the amount of displacement from the initial setting position can always be detected. Since the screw rod 31 and the nut 33 are screwed together, it is possible to finely feed the screw rod 32 and thus finely adjust the height of the swing arm 21, and also to adjust the rotor arm 11 and the circular saw 14. The height of the swing arm 21 holding the heavy object can be adjusted with a small horsepower drive source.

As shown in FIGS. 3 and 4, the locking device 40 is provided with a thin holding plate 21a at the tip end of the swing arm 21.
The holding plate 21a is formed with a guide hole 22 formed in a vertical direction (accurately, in an arc shape). A second motor 42, a lock bolt 43 penetrating through the fixed base 41 in the horizontal direction, and a lock fixed base 41 (for example, a frame-type support) provided near the swing arm 21; A drive transmission mechanism (reduction gear) 44 for rotating the bolt 43 by the second motor 42 and a lock nut 45 screwed to the tip of the lock bolt 43 are provided. further,
The lock bolt 43 also penetrates the guide hole 22 formed in the holding plate 21a of the swing arm 21, and the lock nut 45 is screwed to the lock bolt 43 outside the holding plate 21a.

When the second motor 42 of the lock device 40 is rotated forward, the lock bolt 43 is rotated forward and the lock nut 43 is rotated.
The holding plate 21a of the swing arm 21 can be firmly held between the locking base 41 and the locking base 41 by pulling the lock 45 to the locked state. When the second motor 42 is rotated in the reverse direction, the lock bolt 43 is rotated in the reverse direction, the lock nut 45 is separated from the lock fixing base 41, and the swing arm 21 can be unlocked. The rotation speed of the lock bolt 43 is detected by a proximity switch 57 provided near the base end of the lock bolt 43.
It is possible to always know whether the current state is the locked state or the unlocked state.

The height control device includes a first proximity switch 51 disposed slightly above a proper position through which the cutting edge of the circular saw 14 passes near a log paper cutting position and a second proximity switch disposed slightly below the cutting position. 52, based on the detection output of the first and second proximity switches 51 and 52,
A motor control circuit 53 for controlling the drive of the motor 42 is provided.

Further, an upper limit proximity switch 54 for detecting the state where the swing arm 21 has reached the initially set upper limit position, and a lower limit proximity switch 55 for detecting the state where the swing arm 21 has reached the lower limit position. The motor control circuit 53 controls the first motor 32 based on the detection output of the proximity switches 54 and 55.
Then, the driving of the second motor 42 is stopped and controlled.

The height control device of the above construction detects whether or not the height position of the circular saw is within a set range by the first and second proximity switches 51 and 52, and based on the detected output, each motor 32,
By controlling the drive of the circular saw 14, the height position of the cutting edge of the circular saw 14 can be controlled to be automatically adjusted.

That is, when the diameter of the circular saw 14 gradually becomes smaller and smaller than a specified value as the cutting edge is polished by the circular saw polishing device 15 during use of the circular saw 14 of the log paper cutting device, the first proximity switch 51 is activated. Turns off. Thereby, the operation of the log paper cutting device is stopped. Then, the second motor 42 is drive-controlled by the motor control circuit 53 to set the unlocked state in which the movement of the tip of the swing arm 21 is allowed. Next, the first motor 32 is rotated to rotate the screw rod 31 at a predetermined number of revolutions, and the tip of the swing arm 21 is lowered. The rotation speed at this time can be detected by the proximity switch 56. When the descent is stopped in this way, the second motor 42 is drive-controlled to set a locked state in which the movement of the tip of the swing arm 21 is restricted. The second proximity switch 52
Is to detect the lower limit so that the initial setting when replacing with a new circular saw 14 is not too low. Therefore, the lowering is normally started by turning off the first proximity switch 51, and O
The operation is stopped by N, and this operation is repeated while the log paper is being cut.

The upper limit proximity switch 54 determines the upper limit position of the swing arm 21 at the time of initial setting when the circular saw 14 is replaced with a new one. When the switch is turned on, the upper limit switch is stopped. The lower limit proximity switch 55 detects the lower limit position of the swing arm 21.
Further descent is stopped to prevent physical damage.

In the embodiment of the present invention, the motor control circuit 53 controls the lock nut 45 by the output of the second motor 42.
It is preferable to control the motor output when setting the unlocked state to be larger than the motor output when setting the locked state by tightening. For example, the torque of the second motor (geared motor) 42 when the lock state is set is set to, for example, 50% of the allowable torque, and the output of the second motor 42 when the lock state is set is set to 100% of the allowable torque, for example. It is good to set to%.

[0022]

According to the circular saw height adjusting device of the log paper cutting device of the first aspect, when adjusting the height position of the circular saw,
The height position of the circular saw can be automatically and accurately adjusted in a short time without the need for a manual operation by a skilled operator, so that the production cost can be reduced and the operation rate can be improved. According to the circular saw height adjusting device of the log paper cutting device according to the second aspect, the height of the swing arm can be finely adjusted, and the rotor arm and the heavy material of the circular saw are held. The height of the swing arm can be adjusted with a small horsepower drive source. According to the circular saw height adjusting device of the log paper cutting device of the third aspect, the swing arm is securely held with a large locking force by sandwiching the swing arm between the lock nut and the lock fixing base. Can be set to the locked state. According to the circular saw height adjusting device of the log paper cutting device of the fourth aspect, the motor of the arm vertical moving device and the motor of the lock device are automatically driven and controlled based on the detection output of the proximity switch, and the circular saw height is adjusted. Can always be maintained in an appropriate position.

[Brief description of the drawings]

FIG. 1 is a side view showing a log paper cutting device provided with a circular saw height adjusting device according to a first embodiment of the present invention.

FIG. 2 is a front view of the log paper cutting device and the circular saw height adjusting device.

FIG. 3 is an enlarged partial front view of the circular saw height adjusting device in FIG. 1;

FIG. 4 is an enlarged partial plan view of the circular saw height adjusting device in FIG. 3;

FIG. 5 is an explanatory diagram showing a basic structure of an example of a conventional log paper cutting device.

[Explanation of symbols]

 11 Rotor arm 12 Rotary axis 13 Axis 14 Circular saw 15 Circular saw polishing device 21 Swing arm 22 Guide hole 30 Arm vertical movement device 31 Screw rod 32 First motor 33 Nut 34 Screw rod support base 40 Lock device 41 Locking lock Table 42 Second motor 43 Shaft 44 Drive transmission mechanism 45 Lock member 50 Height control device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-232794 (JP, A) JP-A 2-126796 (JP, U) JP-A 57-13194 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) B26D 1/16 B26D 3/16

Claims (4)

(57) [Claims] (1) A rotor arm whose center is held by a rotating shaft and is driven to rotate, and rotatably mounted on both ends of the rotor arm to be driven to rotate at a high speed to cut log paper. A circular saw height adjusting device incorporated in a log paper cutting device having a circular saw, wherein (b) the bearing of the rotating shaft is held at a central portion, and a base end portion is held rotatably. (C) an arm raising and lowering device for vertically supporting the tip of the rocking arm and automatically adjusting the height thereof;
A log device comprising: a lock device for restraining or releasing the movement of the tip of the swing arm; and (e) a height control device for comprehensively controlling the lock device and the arm vertical movement device. Circular saw height adjusting device for paper cutting device. 2. The arm vertical movement device comprises: (c1) a first motor attached to the swing arm for rotating a vertically oriented screw rod; and (c2) attached to the swing arm. And (c3) a screw rod supporting base fixed and disposed below the swing arm, in contact with a lower end of the screw rod, and supporting the screw rod at a fixed height position. The circular saw height adjusting device for a log paper cutting device according to claim 1, comprising: 3. The lock device includes: (d1) a lock fixing base and a second motor disposed and fixed in the vicinity of the swing arm; and (d2) a vertical portion formed at a tip end of the swing arm. (D3) connecting the lock bolt to the second guide hole with the tip part passing through a part of the guide hole formed in the horizontal direction.
A drive transmission mechanism that is rotated by the output of the motor of
4) a lock nut screwed to the tip of the lock bolt, wherein the lock nut is tightened to the lock fixing base to lock the rocking arm, or the lock nut is fixed to the lock base. 3. A circular saw height adjusting device for a log paper cutting device according to claim 1, wherein the circular saw is set in an unlocked state in which the tip of the swing arm is allowed to move by loosening. 4. The height control device according to (e1), a proximity switch disposed slightly above a proper position through which the blade of the circular saw passes, and (e2) a detection output of the proximity switch. 4. A circular saw height adjusting device for a log paper cutting device according to claim 3, further comprising a motor control circuit for driving and controlling a motor.