JP3132742B2 - Cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary knife type cutting device for cutting a substrate such as paperboard or iron plate.

[0002]

2. Description of the Related Art A rotary knife type cutting device is known
As described in JP-A-61-46277, `` a pair of spindles fixed at both ends with respect to the base, and a pair of hollows rotatably supported via bearings on each of the spindles and rotating in opposite directions to each other. A cutting device comprising a drum, a pair of knives each bolted to a seating surface of an outer peripheral portion of each drum and meshing with each other when both drums rotate, and a driving device for rotating both drums '' have been proposed. I have.

[0003]

In such a cutting apparatus, when a pair of knives are removed from the drum, the cutting edges of these knives are ground, and when these knives are mounted on the drum again, both knives are cut off. The knife edge diameter must be adjusted to a predetermined value, and at the same time, the knife edges of these knives must be adjusted to properly engage. The work of adjusting the blade edge diameter and the operation of adjusting the engagement of the blade edge described above must be performed at each position of the long knife, which is a very complicated operation.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a cutting device capable of easily adjusting the blade tip diameter and engagement of a knife.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there are provided a pair of support shafts each of which is supported at both ends with respect to a gantry;
To be supported lifting are respectively fixed and a pair of supports <br/> rotatable in opposite directions, on the outer periphery of each support, the two support
In a cutting device having a pair of knives meshing at the time of rotation of the body , and a driving device for rotating the two supports ,
One of the knives is a reference knife, and the other is a driven knife, and the tip polished surface of the cutting edge of the reference knife comes into contact with a reference surface formed on the outer periphery of the support. The diameter of the cutting edge is always kept constant.

[0006]

Therefore, according to the cutting apparatus according to the present invention, the support
By contacting the tip polishing surface of the blade of the reference knife with the reference surface formed on the body , the blade diameter of the reference knife is always kept constant, and thereafter, the blade of the driven knife is brought into contact with the blade of the reference knife. You only have to adjust it to mesh. Therefore, after the polishing of the reference knife and the driven knife, the operation of adjusting the blade edge diameter and the operation of adjusting the engagement of the blade edges of both knives can be performed very easily.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an embodiment of the cutting apparatus according to the present invention. FIG. 2 is a sectional view taken along the line II-II of FIG. FIG. 3 is an enlarged sectional view showing a part of FIG. 4A and 4B show the reference knife of FIG. 3, wherein FIG. 4A is a sectional view and FIG. 4B is a front view. 5A and 5B show the driven knife of FIG. 3, wherein FIG. 5A is a sectional view and FIG. 5B is a front view. 6A and 6B show the pressing piece of FIG. 3, wherein FIG. 6A is a sectional view, FIG. 6B is a front view thereof, and FIG. 6C is a front view of another embodiment of the pressing piece.

[0008] As shown in FIG.
A pair of upper and lower support shafts 12 fixed at both ends with respect to 1
A, 12B and a pair of upper and lower hollow drums 14A, 14 rotatably supported on bearings 12A, 12B via bearings (not shown) and rotating in opposite directions to each other.
B (support) , a pair of upper and lower knives 15A, 15B fixed to the outer peripheral portions of the respective drums 14A, 14B and meshing with each other when the drums 14A, 14B rotate, and a drive device for rotating the drums 14A, 14B. 16 are provided.

Both ends of the upper and lower support shafts 12A and 12B are
The gantry 11 is fitted and supported in support holes 17 provided in the gantry 11, and is fixed via fixing plates 19 fixed to both end surfaces thereof.
It is fixed to. Thereby, the upper and lower support shafts 12A, 12A
B is fixed at both ends to the gantry 11.

The upper and lower hollow drums 14A and 14B are rotatably supported on the outer peripheral portions of the corresponding support shafts 12A and 12B via a plurality of pairs of bearings (not shown). Driven gears 20A and 20B are fixed to both end surfaces of the hollow drums 14A and 14B, respectively.
OB is supported by the corresponding support shafts 12A and 12B via a pair of bearings (not shown). The driven gear 20A fixed to both ends of the drum 14A and the driven gear 20B fixed to both ends of the drum 14B mesh with each other, so that the drum 14A and the drum 14B can rotate in directions opposite to each other.

The upper and lower knives 15A and 15B will be described later in detail, and as shown in FIG.
Bolts 22A and 22B are fixed to seating surfaces 21 provided in the longitudinal direction of the outer peripheral portions of 4A and 14B, and mesh with each other when both drums 14A and 14B rotate as described above.

The driving device 16 includes two AC servomotors 23A corresponding to both ends of the drum 14A and a drum 14B
And two AC servo motors 23B corresponding to both ends of the motor. The motors 23A and 23B are fixed to the gantry 11, and the output shafts 24 of the motors 23A and 23B are supported by the gantry 11 via bearings 25.

A drive gear 26A meshing with the driven gear 20A is fixed to the output shaft 24 of both motors 23A.
The output shaft 24 of both motors 23B is connected to the driven gear 20 described above.
The drive gear 26B meshing with B is fixed. As for the motor drive, one is set as a main unit, the other three units are set as a helper, and four units are simultaneously driven by the same torque command as the main motor. Accordingly, the driving of the two drums 14A and 14B is symmetrical in the vertical and horizontal directions, so that the two drums 14A and 14B can ensure the synchronous rotation without twisting over the entire length.

Now, the above-mentioned knives 15A and 15B
As shown in FIGS. 2 and 3, one knife 15B is a reference knife and the other knife 15A is a driven knife. As shown in FIG. 4, the reference knife 15 </ b> B has a plurality of long holes 27 formed therethrough at appropriate intervals in the longitudinal direction, and a plurality of seats 28 formed in a concave shape at positions facing these long holes 27. Is done. Also, the tip of the knife 15B
An end polishing surface 29 is provided. The long hole 27 and the seat 28
Is provided near the cutting edge 46 of the reference knife 15B, as compared with a slot 30 of a driven knife 15A described later.

On the other hand, as shown in FIG. 5, the driven knife 15A is formed with a plurality of elongated holes 30 as bolt through holes at appropriate intervals in the longitudinal direction thereof, and has a polishing surface 31 at the tip.
Is provided. In addition, the proximal end 48 of the driven knife 15A
A plurality of female screw holes 32 are formed at predetermined intervals in the longitudinal direction of the driven knife 15A.

As shown in FIGS. 2 and 3, the reference knife 15B is fixed to the drum 14B by passing a bolt 22B through the elongated hole 27 and screwing the bolt 22B to the drum 14B. A reference surface 33 is formed on the seating surface 21 of the drum 14B, and the polishing surface 29 of the knife 15B contacts the reference surface 33, and the reference knife 15B is mounted. That is, the adjusting bolt 34 is provided on the outer peripheral portion of the drum 14B.
Is screwed, and while the bolt 22B is loosened, the base end surface 35 of the reference knife 15B is pressed by the tip of the adjustment bolt 34, whereby the polished surface 29 of the reference knife 15B is maintained in contact with the reference surface 33. In this state, the bolt 22B is tightened, and the reference knife 15B is attached.

The reference knife 15B is used when the base material 36 such as a paperboard or an iron plate becomes dull.
The polishing surface 29 is polished together with the polishing surface 31 of 5A. This polishing is performed in parallel on the respective polishing surfaces 29 and 31. Accordingly, the cutting edge diameter D of the cutting edge 46 of the reference knife 15B attached to the drum 14B is always constant while the reference knife 15B is mounted on the drum 14B by pressing the polishing surface 29 against the reference surface 33 of the drum 14B. Is held.

A cover 37 is attached to the upper portion of the reference knife 15B attached to the drum 14B so as to cover the seat 28 that houses the bolt head of the bolt 22B.
The outer surface of the cover 37 is formed into a curved surface along the outer peripheral surface of the drum 14B.

The driven knife 15A penetrates the bolt 22A through the elongated hole 30 and interposes a pressing piece 38 between the bolt 22A and the bolt head, and connects the bolt 22A to the drum 1
By being screwed onto 4A, it is fixed to the outer peripheral portion of the drum 14A.

The pressing piece 38 has a bolt insertion hole 39 at the center as shown in FIG.
The seat 40 is formed in a recessed shape at a position facing the. As shown in FIG. 5, a plurality of the pressing pieces 38 are provided at positions corresponding to the elongated holes 30 of the driven knife 15A. The bolt 22A can be inserted into the bolt insertion hole 39, and the head of the bolt 22A can be accommodated in the seat 40.

As shown in FIGS. 6 and 3, when the pressing piece 38 is attached to the driven knife 15A,
It extends to the vicinity of the cutting edge 47 of 5A. A recess 42 is formed around the bolt insertion hole 39 on the knife contact surface 41 of the pressing piece 38 to the driven knife 15A. The concave portion 42 extends in a direction perpendicular to the paper surface of FIG. 6A, and convex portions 43 are formed on both sides of the concave portion 42 to form the knife contact surface 41.

When the driven knife 15A is mounted on the drum 14A via the pressing piece 38, the convex portion 43 of the knife contact surface 41 is located on the cutting edge 47 side and the base end 48 side of the driven knife 15A, and the bolt 22A is provided. First, the bolt tightening force is applied to the blade edge 47 side and the base end 48 side of the driven knife 15A via the projection 43. At the stage when the tightening force of the bolt 22A is increased, the concave portion 42 in the knife contact surface 41 of the pressing piece 38 comes into contact with the driven knife 15A, and the bolt tightening force acts around the elongated hole 30 of the driven knife 15A. I do.

A push bolt 44 and a pull bolt 45 are screwed around the seating surface 21 of the drum 14A. These push bolts 44 and pull bolts 45 are, as shown in FIG.
A plurality of driven knives 15A are alternately arranged along the longitudinal direction. The pull bolt 45 is screwed into the female screw hole 32 of the driven knife 15A. At the stage when the bolt 22A is loosened, the pushing edge 44 pushes out the cutting edge 47 of the driven knife 15A, and the pulling bolt 45 pulls the cutting edge 47 of the driven knife 15A. Adjust the meshing condition with. After this adjustment, the bolt 22A is strongly tightened to fix the driven knife 15A to the seating surface 21 of the drum 14A.

As shown in FIG. 3, the pressing piece 3
The outer surface 8 is set inside (toward the drum 14A) the cutting edge passing line L of the driven knife 15A and is formed into a curved surface. The curved surface of the outer surface of the pressing piece 38, together with the curved surface of the outer surface of the cover 37, avoids collision with the base material 36 and suppresses turbulence of air around the drums 14A and 14B rotating at high speed. The feeding of the base material 36 is stabilized.

According to the above-described embodiment, the tip end polishing surface 29 of the reference knife 15B is brought into contact with the reference surface 33 formed on the drum 14B, whereby the diameter D of the reference knife 15B is always kept constant. Therefore, after that, the cutting edge 47 of the driven knife 15A is
It may be adjusted so as to mesh with 6. Therefore, the work of adjusting the diameter of the cutting edge of the reference knife 15B and the driven knife 15A after polishing and the operation of adjusting the engagement of the cutting edges of both knives 15A and 15B can be performed very easily. As a result, the reference knife 1
The cutting edge speed determined based on the cutting edge diameter D of the driven knife 5B and the driven knife 15A can be easily matched with the feed speed of the base material 36, and the sharpness of the base material 36 can be maintained well.

When the driven knife 15A is fixed to the seating surface 21 of the drum 14A by tightening the bolt 22A, the bolt 43 is fastened to the vicinity of the cutting edge of the driven knife 15A by the projection 43 on the knife contact surface 41 of the pressing piece 38. Since the force is applied and the driven knife 15A is supported on the seating surface 21 up to the vicinity of the cutting edge 47, the tightening area of the driven knife 15A by the bolt 22A is enlarged, and the fixed state of the driven knife 15A can be stabilized. As a result, When the drums 14A and 14B are rotated and the base material 36 is cut by the knives 15A and 15B, the driven knife 15A can be prevented from swinging. At this time, the bolt 22 </ b> B also applies a bolt tightening force to the vicinity of the cutting edge 46 by the bolt 22 </ b> B, and the polishing surface 29 of the reference knife 15 </ b> B is supported by the reference surface 33. From these, the sharpness of the base material 36 by the reference knife 15B and the driven knife 15A can be favorably maintained.

The pressing piece 38 in the above embodiment is used.
The knife contact surface 41 has two protrusions 43 formed thereon. However, as shown in a pressing piece 50 shown in FIG. 6C, four protrusions 52 are formed on the knife contact surface 51 by bolt insertion holes. 39 may be formed. Thus, the four protrusions 52
In this case, the driven knife 15A can be more firmly supported than in the case of the two-point support of the pressing piece 38 of the above embodiment.

[0028]

As described above, according to the cutting apparatus of the present invention, it is possible to easily adjust the blade edge diameter and engagement of the knife.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a cutting device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged sectional view showing a part of FIG. 2;

FIG. 4 shows the reference knife of FIG. 3, wherein (A) is a cross-sectional view and (B) is a front view.

5A and 5B show the driven knife of FIG. 3, wherein FIG. 5A is a sectional view and FIG. 5B is a front view thereof.

6A and 6B show the pressing piece of FIG. 3, wherein FIG. 6A is a cross-sectional view, FIG. 6B is a front view thereof, and FIG. 6C is a front view of another embodiment of the pressing piece. is there.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 cutting device 11 gantry 12A, 12B spindle 14A, 14B drum (support) 15A knife (driven knife) 15B knife (reference knife) 16 drive device 22A, 22B bolt 29 polishing surface of tip of cutting edge of reference knife 30 of driven knife Long hole 33 Reference surface of drum 14B 36 Base material 38 Pressing piece 39 Bolt insertion hole of pressing piece 41 Knife contact surface of pressing piece 42 Knife contact surface concave portion 43 Knife contact surface convex portion

Claims (1)

(57) [Claims] A pair of support shafts claim 1, wherein each relative gantry is supported at both ends, are supported lifting the respective support shafts, a pair of support members rotatable in opposite directions, respectively on the outer periphery of each support fixed, and a knife during rotation in mesh with the pair of the two support in the cutting apparatus comprising a, a driving device for rotating the two support while the reference knife the knife and the other a driven knife The polished surface of the cutting edge of the reference knife abuts on a reference surface formed on the outer peripheral portion of the support , so that the cutting edge diameter of the reference knife is always kept constant. A cutting device.