JPH04223145A - Groove-cutting device of sheetlike material - Google Patents

Abstract

PURPOSE:To enable slotting process to be achieved with wide freedom for a sufficiently deep and long box without the limitation due to the mechanical structure of a slotter. CONSTITUTION:A pair of a slotter shaft 10 and a blade-receiving shaft 12 which are arranged in the vertical relation of and rotate in the opposite direction mutually, at least are groove-cutting blade 16 fixed to the holder 14 provided on the slotter shaft 10 and the receiving blades 20, 22 which are provided on the holder 18 provided on the blade-receiving shaft 12 and cooperate with the groove-cutting blade 16 correspondingly, are provided. Rotation-driving source 40 to be contralled independently is connected to the slotter shaft 10. this device is free from the limitation of the mechanical structure due to the distance of the groove-cutting blade and the distance between slotter shafts etc., and may cut the groove for sufficiently long sheetlike material.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a grooving device for sheet material, and more specifically, the present invention relates to a device for grooving sheet materials, and more specifically, it is possible to overcome constraints on the mechanical structure due to the distance between the grooving blades in the device, the distance between the slotter shafts, etc. The present invention relates to a grooving device that can suitably perform grooving even on a sufficiently long sheet-like material without receiving the material.

0002

[Prior Art] In order to process a corrugated cardboard sheet cut to a predetermined length to produce a blank for box manufacturing, the sheet is first cut with the required grooves (slotting).
It is also necessary to add vertical lines (creasing). For this purpose, a multifunction device generally referred to as a flexographic printer slotter is suitably used. For example, the multifunction device is constructed by arranging units such as a flexo printing machine, a creaser, and a slotter in series, and performs creasing (vertical ruling) on the corrugated cardboard sheet passing through these units. Processing such as grooving and slotting are gradually being applied.

[0003] The present invention provides a groove cutting device (hereinafter referred to as a "slotter").
Since it is related to the improvement of the slotter according to the prior art, the general mechanism of the slotter according to the prior art will be explained first. Figures 5 and 6 are
This figure shows a schematic configuration of the slotter, in which a slotter shaft 10 and a receiving blade shaft 12, which rotate in opposite directions, are disposed oppositely in a vertical relationship. This slotter shaft 1
0 includes disk-shaped holders 14 at required intervals in the axial direction,
The holder 14 is provided with two groove cutting blades 16, 16 which are spaced apart from each other in the circumferential direction and whose spacing is adjustable. Further, the receiving blade shaft 12 is also provided with disc-shaped holders 18 at required intervals in the axial direction, and the holder 18 has two receiving blades 20 and 22 that cooperate with each of the groove cutting blades 16 in a corresponding manner. (See Fig. 7) is provided. Then, each corresponding groove cutting blade 1
6 and the receiving blades 20, 22 in the direction of the arrow, slots 26 of a required depth are machined at both ends of the sheet 24 in the front and rear direction. A blank 28 for the box is formed. Since three slots 26 are formed at predetermined intervals in the sheet lateral direction, three holders 14 and 18 are provided on the slotter shaft 10 and the receiving blade shaft 12, respectively. In addition, the circular member at the left end in FIG. 5 shows a slitter 30 for cutting the edge of the corrugated cardboard sheet 24, and the circular member at the right end has a squaring blade 32 for forming a seam allowance at the end of the sheet 24. It shows.

In the blank 28 for an A-type box shown in FIG. 5, the vertical ruled portions 34 located between the slots 26 formed at both ends of the sheet define each tab face 36 and side face 38 when assembling the box. At the same time, its length defines the depth L of the box. The depth L of this box is determined by the distance L between two groove cutting blades 16, 16, which are provided on the holder 14 of the slotter shaft 10 so as to be able to approach and separate in the circumferential direction, as shown in FIG. That is, FIG. 6(a) shows the distance L1 when the two groove cutting blades 16, 16 in the holder 14 are sandwiched to the minimum, and FIG. 6(b) shows the distance L1 between the two groove cutting blades 16, 1.
The depth L of the box can be freely set only within the range of the interval distance L2 when 6 is widened to the maximum extent. In other words, it is impossible to manufacture a box deeper than the maximum separation distance L2, and in this sense, the method is limited to the mechanical structure of the slotter.

The slotter shown in FIG. 5 is of a type in which only one slotter shaft 10 is provided, and two grooving blades 16, 16 are provided on the holder 14 so as to be able to approach and separate from each other. is called a single slotter. As a type of this single slotter, there is a double slotter shown in FIG. In this system, two slotter shafts 10, 10 are arranged in series in the sheet passing direction, and only one grooving blade 16 is provided on each of the holders 14 arranged on each slotter shaft 10. . A receiving blade shaft 12 is disposed correspondingly below each slotter shaft 10, and receiving blades 20, 22 correspondingly cooperating with the grooving blade 16 are provided on the holder 18 of the receiving blade shaft 12. It is being Since this double slotter basically consists of two slotters, it has the advantage that the depth L of the box can be set to be somewhat larger than the single slotter described above.

[0006]

However, even with the above-mentioned double slotter, the depth L of the box that can be slotted is limited by the distance between the two slotter shafts 10, 10. It is something. In other words, it must be said that the double slotter is not free from the constraints associated with its mechanical structure. Therefore, as shown in FIG. 9, in order to obtain a long box body with an extremely large depth L, which is used for packaging aluminum sashes, poles, etc., the slotting process from a corrugated cardboard sheet is difficult. For single and double slotters,
These processes were not possible due to its mechanical structure.

[0007]

OBJECTS OF THE INVENTION The present invention has been proposed to suitably solve the problems inherent in the slotter described above, and is not limited to the mechanical structure of the slotter. It is an object of the present invention to provide a sheet material grooving device capable of slotting a long box body having a sufficiently large depth.

[0008]

[Means for Solving the Problems] In order to overcome the above-mentioned problems and achieve the intended purpose, the sheet material grooving device according to the present invention is arranged in a vertical relationship, and is arranged in opposite directions. a pair of rotating slotter shafts and receiving blade shafts, at least one grooving blade fixed to a holder disposed on the slotter shaft, and at least one grooving blade provided on the holder disposed on the receiving blade shaft; and a rotary drive source that is connected to the slotter shaft and is independently and independently controlled. The invention is characterized in that it is configured to apply controlled rotation to perform grooving on a sheet material passed between the grooving blade and the receiving blade.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the sheet material grooving apparatus according to the present invention will be described below with reference to the accompanying drawings. It should be noted that members corresponding to those described above will be given the same reference numerals and detailed explanations will be omitted.

FIG. 1 schematically shows a sheet material grooving device according to a preferred embodiment of the present invention, in which grooves are arranged on a single slotter shaft 10 at predetermined intervals in the axial direction. Each holder 14 is provided with a single grooving blade 16. Further, a single receiving blade shaft 12 is disposed below the slotter shaft 10 and facing it, and this receiving blade shaft 12 is also provided with holders 18 at required intervals in the axial direction. Two receiving blades 20, 22 correspondingly cooperate with the groove cutting blade 16.
is installed. A rotary drive source 40, such as an AC servo motor, which is independently controlled, is connected to the slotter shaft 10. Note that the single receiving blade shaft 12 is powered by an existing common drive source (for example, a line shaft in a corrugator line) that drives other units connected to this grooving device, so that gears such as bevel teeth can be driven. Although rotated through the columns, other formats may be used, as described below.

By giving a necessary control command to the rotational drive source 40, the slotter shaft 10 is given controlled rotation, and the slotting blade 16 and receiving blades 20, 22 are rotated in a controlled manner.
Groove processing is performed on the corrugated cardboard sheet 24 that is passed between. That is, the rotating shaft of the AC servo motor 40 is directly connected to the slotter shaft 10, and the servo motor 40 receives speed change commands from the illustrated variable speed control section 42, and performs various rotational controls such as speeding up, stopping, and decelerating. . Also, servo motor 4
0 is provided with a rotation detector 44 such as a pulse generator, and this rotation detector 44 monitors the rotation speed of the motor 40 and feeds back the detected value to the variable speed control section 42. There is. Note that depending on practical requirements, specifications for direct current control using a DC servo motor may be used.

0012

[Operation of the Embodiment] With the above-described structure, the slotting device according to the embodiment can independently control the slotter shaft 10 by the servo motor 40, and slot the corrugated sheet 24 by the grooving blade 16. It has become possible to implement the system with a considerable degree of freedom without being restricted by mechanical configurations. That is, the slotter shaft 10 and the groove cutting blade 16 provided therein in the groove cutting device are independently and freely rotationally controlled by the servo motor 40, independently of rotating parts such as other printing machines and creasers. It's something you get. Therefore, as described in relation to FIG. 9, when slotting is performed on both ends of the corrugated cardboard sheet 24, which is vertically long in the transport direction, in order to manufacture a long box body with an extremely large box depth L. This can be done by controlling the rotation of the slotter shaft 10 (and the grooving blade 16) as shown in FIGS. 2(a) to 2(e).

For example, as shown in FIG. 2(a), a slotter shaft 10 is rotated by a servo motor 40, and a vertically long corrugated paperboard sheet 24 is fed thereto in the transport direction. As a result, the leading end side of the corrugated paperboard sheet 24 is cut as shown in FIG.
Slots 26 are cut at required intervals as shown in FIG. When the required slots 26 have been machined, as shown in FIG. 2(c), the driving of the servo motor 40 is stopped, and the rotation of the slotter shaft 10 is accordingly stopped. At this time, the groove cutting blade 16 is controlled so as to stop at a position slightly separated from the upper surface of the sheet 24. However, as mentioned above, the receiving blade shaft 12 is rotated by power supplied from an existing common drive source that drives other units, so the cardboard sheet 24 placed on the receiving blades 20 and 22 is
The feed will continue without interruption. Therefore, the sheet 24 is fed by the required box depth L without being subjected to slotting by the groove cutting blade 16.

Next, as shown in FIG. 2(d), the slotting area on the rear end side of the corrugated cardboard sheet 24 is
The drive of the servo motor 40 is restarted at the timing when the groove cutting blade 16 reaches the position below the grooving blade 16 which is on standby. Therefore, the slotter shaft 10 starts its rotation again, and the slotting blade 1
6 and the receiving blades 20 and 22, a slot 26 can be cut on the rear end side of the sheet 24. When this slotting process is completed, the drive of the servo motor 40 is stopped again, as shown in FIG. 2(e). Therefore, the slotter shaft 10 also stops with its grooving blade 16 slightly spaced from the upper surface of the sheet 24, and waits for the arrival of the next corrugated board sheet 24.

As already mentioned, conventional single slotters and double slotters have two
It has not been possible to slot a box having a depth L that exceeds the distance between the two slotting blades 16 or the distance between the two slotter shafts 10. However, according to the grooving device according to this embodiment, the slotter shaft 10 (and its grooving blade 16) is independently controlled in various ways such as speeding up, deceleration, and stopping by a variable-speed servo motor 40. . For this reason, regarding the corrugated cardboard sheet 24 that is fed toward the groove cutting device of the embodiment, the slotting process is performed by rotating the groove cutting blade 16 only at the location where slots are planned to be formed on the leading end side of the sheet 24. In the area corresponding to the depth of the box, the sheet 24 is conveyed while the rotation of the groove cutting blade 16 is stopped. When the slot is to be formed at the rear end of the corrugated sheet 24, the slotting blade 16 is rotated again to perform slotting at that part, and then the sheet 24 is sent out to form the next sheet 24. It is possible to easily manufacture a sufficiently deep and long box without being restricted by the mechanical configuration of the slotter.

As shown in FIG. 1, when the slotting device (slotter) according to this embodiment is disposed on the downstream side of the flexographic printing machine 46, for example, an optical Preferably, a sheet leading edge detector 48 such as a sensor is provided to confirm the discharge of the corrugated cardboard sheet 24. Further, the delivery roll 50 of the printing machine 46 is provided with a rotation detector 52 such as a pulse generator, and the sheet delivery speed of the printing machine 46 detected from the rotation detector 52 is configured to be inputted as data to the variable speed control section 42. I'll keep it. In this case, the rotation of the AC servo motor 40 can be controlled to the most appropriate value by the variable speed control unit 42 in synchronization with the sheet feeding speed from the printing machine 46.

Further, as shown in FIG. 3, the receiving blade shaft 12 is connected to another rotary drive source 40 which is independently controlled. It may also be possible to apply a given rotation. The holder 14 of the slotter shaft 10 has a groove cutting blade 1 as shown in FIG.
It is generally recommended that only one 6 is fixedly arranged. However, in order to obtain a large grooving depth in the blank 28, two grooving blades 16, 16 may be fixedly arranged on the holder 14, as shown in FIG.

[0018]

As explained above, according to the sheet material grooving device according to the present invention, the mechanical structure is not limited by the distance between the grooving blades, the distance between the slotter shafts, etc. However, even a sufficiently long sheet material can be suitably grooved.

[Brief explanation of the drawing]

FIG. 1 schematically shows a sheet material grooving device according to a preferred embodiment of the present invention.

[Fig. 2] A sheet material grooving device according to a preferred embodiment of the present invention performs slotting processing on both ends of a vertically long corrugated cardboard sheet in the conveying direction to create a long box with an extremely large depth. It is an explanatory view showing a process of manufacturing a box.

FIG. 3 is a schematic configuration diagram showing a state in which the receiving blade shaft is connected to another independently controllable rotary drive source in the sheet material grooving apparatus according to the preferred embodiment of the present invention.

[Fig. 4] In the sheet material grooving device according to the preferred embodiment of the present invention, two grooving blades are fixedly arranged on the holder of the slotter shaft to increase the grooving depth of the blank. It is a schematic explanatory view of a modification.

FIG. 5 is a perspective view illustrating a schematic mechanism of a single slotter according to the prior art.

6 is an explanatory diagram showing the minimum and maximum distances between two grooving blades in the slotter shown in FIG. 5; FIG.

FIG. 7 is a side view showing a state in which two receiving blades that correspond to and cooperate with each of the grooving blades are arranged in a holder provided on the receiving blade shaft.

FIG. 8 is a front view illustrating a schematic mechanism of the double slotter.

FIG. 9 is a plan view of a blank for obtaining a long box body with an extremely large depth, which is used for packaging aluminum sashes, poles, etc.

[Explanation of symbols]

10 Slotter axis 12　Blade shaft 14 Holder 16 Grooving blade 18 Holder 20, 22 Uke blade 24 Sheet material 40 Rotary drive source

Claims (4)

[Claims] 1. A pair of slotter shafts (10) and receiving blade shafts (10) arranged vertically and rotating in opposite directions.
12) and a holder (
At least one groove cutting blade (16) fixed to the groove cutting blade (14) and a holder (18) disposed on the receiving blade shaft (12) and correspondingly cooperating with the groove cutting blade (16). Ukeblade (
20, 22) and connected to the slotter shaft (10),
It consists of a rotary drive source (40) that is independently and independently controlled, and by giving a necessary control command to the rotary drive source (40), controlled rotation is imparted to the slotter shaft (10), The groove cutting blade (16) and the receiving blade (20, 22)
) A sheet material grooving device characterized in that it is configured to perform grooving on a sheet material (24) that is passed between the sheet material (24) and the sheet material (24). 2. The sheet material grooving apparatus according to claim 1, wherein the rotational drive source (40) is composed of an AC servo motor or a DC servo motor. 3. The receiving blade shaft (12) is rotated by being supplied with power via a gear train from a common drive source that drives other units connected to the grooving device. Grooving device for sheet materials. 4. The receiving blade shaft (12) is connected to another rotational drive source (40) that is independently and independently controlled, and is given rotation that is controlled independently of the slotter shaft (10). A grooving device for sheet material according to claim 1, characterized in that: