JP2001088084A - Cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter driving a cutter blade with a simple structure. SOLUTION: A holder 3 holding a cutter blade 2 is formed so that guide grooves 4 and 5 are moved aslant along a guide block 6a (not shown) and a roller 6. A power of a drive motor 8 is transmitted to a nut 14 through pulleys 11 and 12 and a belt 12 to produce a thrust by a screw 17 engaged with the nut 14 so as to move a connecting rod up and down. A bearing is disposed between the nut 14 and an outer tube 15. The connecting rod 16 is connected to a connection piece 3a, and the connection piece 3a of the holder 3 connected rotatably to a connection shaft 7a. Thus, when the connecting rod 16 is moved up and down in the arrow direction of Y, the cutter blade 2 is also moved up and down in connection with the connecting rod.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting apparatus in which a driving source of a cutting blade has a simple structure.

[0002]

2. Description of the Related Art In a bookbinding process, a cutting apparatus is used which cuts one side or three sides of laminated paper and trims the cut surfaces. FIG. 4 is a schematic front view showing an example of such a cutting device 30.

In FIG. 4, a predetermined number of sheets P stacked on a table (mounting table) T are positioned and mounted. Reference numeral 31 denotes a cutting blade which is attached to the holder 32 and moves up and down in an oblique direction indicated by the arrow X, 33 denotes a first connecting portion, and 34 denotes a first hydraulic mechanism for driving the cutting blade 31.

Reference numeral 35 denotes a clamp member (paper pressing plate) for pressing the paper P, 36 denotes a second connecting portion, and 37 denotes a second hydraulic mechanism, which moves the clamp member 35 up and down in the Y direction (vertical direction). Let it. 38 is a first spring holding portion, 39
Is a first chain, 40 is a first pulley, and 41 is a first connecting portion.

Reference numeral 42 denotes a second spring holding portion,
3 is a second chain, 44 is a second pulley, and 45 is a second connecting portion. When the second hydraulic mechanism 37 is operated, the clamp member 35 descends against the elastic holding of the first spring holding portion 38 and the second spring holding portion 42 and stops at the position where the paper P is pressed. When the operation of the second hydraulic mechanism 37 is stopped and the operating oil is discharged, the clamp member 35
Rises due to the elasticity of the first spring holding portion 38 and the second spring holding portion 42 and returns to the origin position.

A predetermined number of stacked sheets P are positioned and placed on a table (mounting table) T, and the second hydraulic mechanism 3
7, the paper P is pressed by the clamp member 35.
Next, the first hydraulic mechanism 34 is operated to lower the cutting blade 31 from obliquely above as described above to cut a predetermined position of the sheet P.

[0007]

As described above, in the conventional cutting device, since the hydraulic mechanism is used as the driving device of the cutting blade, the device becomes large, and adjustment and driving of the hydraulic pressure can be performed.
There has been a problem that operations such as stopping are complicated. Also,
In some cases, a crank mechanism is used as a driving device for the cutting blade. However, in this case, a large flywheel must be constantly rotated, which causes a problem that the device becomes large and energy consumption increases.

The present invention has been made in view of the above problems, and has as its object to provide a cutting apparatus in which the configuration of the driving source of the cutting blade is simplified.

[0009]

SUMMARY OF THE INVENTION The object of the present invention is to provide a cutting apparatus, comprising: a cutting device for cutting a cut object; a holder for holding the cutting blade; A nut that is rotated by transmitting the power of the drive motor, a connecting rod having a screw engaged with the nut, and a connecting piece that movably connects the holder to the connecting rod;
This is achieved by raising and lowering the connecting rod in accordance with the rotation direction of the drive motor, and lowering or raising the cutting blade in accordance with the raising and lowering of the connecting rod.

According to a second aspect of the present invention, in the cutting apparatus according to the first aspect, the cutting blade is tilted and held at a position of a top dead center and horizontally held at a position of a bottom dead center. Features.

As described above, according to the first aspect of the present invention, the power of the driving motor is transmitted to the cutting blade via the connecting rod formed with the nut and the screw, and the cutting blade is moved up and down. Therefore, the configuration of the driving source of the cutting blade can be simplified.

Further, in the invention according to claim 2, the cutting blade is held at an inclined position at the top dead center, and is held horizontally at the position of the bottom dead center. Therefore, the driving force of the cutting blade can be reduced, and the life of the cutting blade can be extended. Also,
The cutting surface can be beautifully arranged.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cutting apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view of the cutting apparatus 1. In FIG. 1, 2 is a cutting blade, 3 is a holder for holding the cutting blade 2, 4 and 5 are guide grooves formed in the holder 3, and 6 is a guide block engaging with the guide groove 5. Although not shown, a guide block 6a that engages with the guide groove 4 is also provided.

The guide blocks 6, 6a are composed of shafts 6x, 6y
Is fixed rotatably. When a driving force is applied as described later, the guide grooves 4 and 5 of the holder 3 move up and down obliquely along the guide blocks 6 and 6a to move the cutting blade 2 up and down. Reference numeral 7 denotes a connecting portion, which connects the connecting piece 7b and the connecting piece 3a of the holder 3 to the connecting shaft 7a.

Reference numeral 8 denotes a servomotor for driving the cutting blade,
Reference numeral 0 denotes a pressing plate of the outer cylinder 15, and the pressing plate 9 and the pressing plate 10 are fixed by inserting bolts into openings 9a and 10a formed in the pressing plates 9 and 10, respectively. Although illustration is omitted,
Openings are provided at the four corners of each of the support plates 9 and 10 and fixed with bolts.

Reference numeral 11 denotes a first pulley connected to the output shaft of the servomotor 8, 12 denotes a second pulley, and 13 denotes a first pulley.
Is a belt stretched between the pulley 11 and the second pulley 12. Numeral 14 is mechanically connected to the second pulley 12 by a nut. Reference numeral 15 denotes an outer cylinder, and a bearing is provided between the nut 14 and the outer cylinder 15.

A connecting rod 16 has one end connected to the connecting piece 7 of the connecting portion 7.
b, and a screw 17 is formed at the other end to engage with the nut 14. Reference numeral 18 denotes a fulcrum shaft fixed between the pressing plate 9, the outer cylinder 15, and the pressing plate 10. The fulcrum shaft 18 serves as a swing center of the rotating shaft 16 as described later.

When the servomotor 8 is driven, the first pump
Rotational force is transmitted to the nut 14 via the power transmission mechanism of the pulley 11, the second pulley 12, and the belt 13, and the nut 14 rotates. Therefore, the screw 1 engaged with the nut 14
7 is also transmitted to generate a thrust and the connecting rod 16
Moves upward or downward in the arrow Y direction according to the forward or reverse rotation direction of the servomotor 8.

When the connecting rod 16 is moved up and down by driving the servomotor 8 in this manner, the connecting piece 3 of the holder 3 is connected to the connecting piece 7b of the connecting portion 7 and the connecting shaft 7a.
a is connected, the holder-3 moves up and down in an oblique direction as described above in conjunction with the movement of the connecting rod 16, and the cutting blade 2
Also moves up and down diagonally.

Reference numeral 19 denotes a fixed wood fitted into a groove formed on the mounting table, and the sheet to be cut is positioned and mounted on the fixed wood 19. When the cutting blade 2 cuts the sheet, the position of the fixed wood 19 is the position of the bottom dead center of the cutting blade.

Next, the configuration of a paper clamping member using a paper pressing plate will be described. Reference numeral 20 denotes a first servomotor having a large driving torque, and reference numeral 21 denotes a second servomotor having a small driving torque.
Servo motor. For cutting a normal sheet, the first servomotor 20 is driven to apply a predetermined pressing force to the sheet pressing plate to press the sheet placed on the fixed wood.
Assuming that the rated output of the first servomotor 20 is 1.5 kW, the pressing force is about 2.5 tons.

However, when a small amount of thin paper is cut, it is necessary for the operator to move the paper pressing plate while pressing the paper with one hand. Such a form of work is called a soft clamp, in which the pressing force of the sheet pressing plate is at most about 50 kg, and the pressing force at the rated output of the first servomotor 20 having the large driving torque is large. It is about 1/50.

It is difficult to control the torque of the first servomotor 20 having a large driving torque so as to obtain such a low pressing force. For this reason, during the operation of the soft clamp, the paper pressing plate is driven by switching from the first servo motor 20 having a large driving torque to the second servo motor 21 having a small driving torque.

Reference numeral 22 denotes a first pulley connected to the output shafts of the first servomotor 20 and the second servomotor 21. Reference numeral 23 denotes a second pulley, and reference numeral 24 denotes a belt stretched between the first pulley 22 and the second pulley 23. When electric power is supplied to one of the first servo motor 20 and the second servo motor 21 to drive the other servo motor, the other servo motor rotates with its rotating shaft idling.

Reference numeral 25 denotes a rotating shaft; 26, a feed screw formed on the rotating shaft 25; 27, a movable base; 28, a holding plate;
1 and 32 are swing arms, 29 and 30 are swing arms 31,
The roller is supported by 32. A groove for engaging with the feed screw 26 is formed in the moving table 27, and an opening through which the feed screw 26 is inserted is provided in the holding plate 28.

The rotating shaft 25 is arranged near the center in the width direction of the sheet pressing plate, and the swing arms 31 and 32 are formed to have the same length. A connecting plate 34 is connected to one end of the swing arm 32 by a fixing portion 33, and the connecting plate 34 is fixed to a paper pressing plate (not shown). Similarly, a connecting plate is connected to one end of the swing arm 31 by a fixing portion, and the connecting plate is also fixed to the paper holding plate.

In the cutting apparatus, in order to effectively perform the cutting operation of the sheet, the sheet pressing plate descends first and presses the sheet against the sheet placed on the fixed wood. The cutting blade cuts a predetermined position of the sheet. Therefore, the servomotor 20 or 21 is driven first to lower the sheet holding plate to the position of the sheet, and then the motor 8 is driven to lower the cutting blade 2 to the position of the sheet. In addition, the control device controls the operation of each drive source.

Next, details of the raising and lowering operation of the cutting blade in the cutting apparatus of the present invention will be described with reference to the front views of FIGS. Figure 2 shows the position of the cutting blade at the top dead center (initial stop position)
FIG. 3 shows a state in which the cutting blade is at the position of the bottom dead center (the position where the cutting of the sheet is completed).

As shown in FIG. 2, at the position of the top dead center, the tip of the cutting blade 2 is stationary at a position inclined upward by an angle θx with respect to the horizontal plane. In addition, the rotation shaft 16 is stationary at a tilt angle θa counterclockwise with respect to the vertical line V and at a tilt angle θy upward with respect to the horizontal line H.

When the servomotor 8 is driven, the nut 14 rotates as described above, and a thrust is generated on the connecting rod 16 by the screw 17 engaged with the nut 14, so that the connecting rod 16 is moved in the direction of the arrow Ya. To rise. When the connecting rod 16 is raised, the connecting piece 3a and the connecting piece 7b of the holder 3 are connected to the connecting shaft 7a.
Around the center. At this time, the connecting rod 16 swings about the fulcrum shaft 18. For this reason, a downward propulsive force acts on the holder 3, the guide grooves 4, 5 descend along the guide blocks 6a, 6, and the holder 3 and the cutting blade 2 descend in the arrow Xa direction.

The angles θ1 and θ2 between the guide grooves 4 and 5 provided in the holder-3 and the holder-3 are set so that θ2 is larger than θ1. Further, the guide block 66a is attached so as to rotate about the shafts 6x and 6y. For this reason, the holder-3 and the cutting blade 2
Is lowered, the guide grooves 4 and 5 are inserted into the guide blocks 6 and 6.
Guided by a, the cutting blade 2 descends in the arrow Xa direction while swinging in the arrow R direction with respect to the longitudinal direction. That is,
The cutting blade 2 descends while swinging counterclockwise with respect to the longitudinal direction, and the cutting edge is in a horizontal state at the position of the bottom dead center as shown in FIG.

As described above, the cutting blade 2 swings in an arc shape with respect to the longitudinal direction and descends to cut a predetermined position of the sheet. For this reason, kinetic energy is accumulated in the cutting blade 2,
Predetermined cutting can be performed with a small driving force. In addition, the entire cutting edge of the cutting blade 2 does not contact the sheet at the same time, but the cutting edge advances cutting while partially contacting the sheet, so that the life of the cutting blade can be extended. Further, the cutting edge is sharply cut into the paper, and a beautiful cut surface is obtained.

In FIG. 3, since the connecting rod 16 swings about the fulcrum shaft 18 as described above, the connecting rod 16 is inclined at an angle θb with respect to the vertical line V and at an angle θz with respect to the horizontal line H. I have. Therefore, the angle θb between the connecting rod 16 and the perpendicular V is smaller than the angle θa in the initial state shown in FIG. Also, the angle θz with respect to the horizontal line H
Is smaller than the angle θy in the initial state shown in FIG.

In the above example, the cutting blade is driven as a drive source.
In the present invention, a normal motor other than the servo motor, a hydraulic motor, or the like can be used as a driving source of the cutting blade. Although the sheet is cut by the cutting blade, the cutting apparatus of the present invention can be applied to a case where a sheet-like material such as resin or wood is used as the cut object.

[0035]

As described above, according to the first aspect of the present invention, the power of the driving motor is transmitted to the cutting blade via the connecting rod formed with the nut and the screw to move the cutting blade up and down. . Therefore, the configuration of the driving source of the cutting blade can be simplified.

Further, in the invention according to claim 2, the cutting blade is held at an inclined position at the top dead center, and held horizontally at the position of the bottom dead center. Therefore, the driving force of the cutting blade can be reduced and the life of the cutting blade can be extended. Also,
The cutting surface can be beautifully arranged.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a cutting apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a front view of a conventional cutting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting device 2 Cutting blade 3 Holder 4, 5 Guide groove 6, 6a Roller 7 Connection part 8 Servo motor 14 Nut 15 Outer cylinder 16 Rotation shaft 17 Screw 18 Support shaft 19 Stable tree 20, 21 Paper press Plate driving servo motor 27 Moving table 31, 32 Swing arm

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masashige Sugimoto 1601 Asahi Jinoshita, Asahi-cho, Takashima-gun, Shiga Prefecture In-house Horizon International Co., Ltd. 1601 Asahi Jinoshita Horizon International Co., Ltd.

Claims (2)

[Claims] 1. A cutting blade for cutting an object to be cut, a holder for holding the cutting blade, a driving motor, a nut to which power of the driving motor is transmitted, and a nut to be engaged. A connection rod having a thread formed thereon, and a connection piece for connecting the holder to the connection rod so as to be movable, and the connection rod is moved up and down in accordance with the rotation direction of the drive motor to correspond to the elevation of the connection rod. A cutting device for lowering or raising a cutting blade. 2. The cutting apparatus according to claim 1, wherein the cutting blade is held at an inclination at a position of a top dead center and is held horizontally at a position of a bottom dead center.