JPS63306895A - Grooving device for sheet-shaped material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a groove cutting device for sheet material.

More specifically, in a grooving device that cuts the required grooves in a corrugated cardboard sheet to obtain a blank for box manufacturing, even if the sheet is simply passed through without grooving, the sheet dimensions may vary. This invention relates to a groove cutting device that can provide smooth feed without being restricted.

Prior Art In order to manufacture a box from a corrugated cardboard sheet cut to a predetermined length, it is necessary to obtain a blank in which the sheet has been subjected to the required slotting and vertical lines (creasing). A multifunction device called a flexographic printer slotter is suitably used for this purpose. This equipment is constructed by arranging units such as a flexo printing machine, a creaser, and a slotter in series, and not only applies the required printing to the corrugated board sheet that passes through these units, but also performs various processing such as creasing and slotting. It is to be applied sequentially.

Since the present invention relates to the improvement of a groove cutting device (hereinafter also referred to as "slotter j"), the schematic mechanism of this slotter will first be explained. FIG. shows a groove cutting blade 14 and two receiving blades 16 arranged in a vertical relationship.
, 16 is provided inside.

A cardboard sheet 1 is placed between the groove cutting blade 14 and the receiving blade 16.
2 is fed horizontally, the ends of the sheet 12 in the width direction are subjected to the required slotting process.

Note that since the corrugated sheet 12 needs to be subjected to a plurality of slotting processes in its width direction, two slotters are arranged in series in parallel in the flow direction of the corrugated sheet 12.

As shown in FIG. 7, the slotter frame (not shown) has a slotter shaft 18 and a receiving blade shaft 20, which rotate in opposite directions in synchronization with the feeding speed of the corrugated sheet 12, in a vertical relationship. It is located.

Ring bodies 22 and 24 each consisting of a disk having a predetermined thickness are attached to the shafts 18 and 20 in opposing directions by set bolts 26, respectively. Note that the distance between the two apical bodies 22° and 24 is
The thickness is set in advance to be approximately equivalent to the paper thickness of the corrugated cardboard sheet 12, so that the corrugated cardboard sheet 12 supplied between the top bodies 22 and 24 can be sandwiched and fed to the downstream side.

As shown in FIG. 8, on the left side of the annular body 22 fixed to the slotter shaft 18, a sector-shaped grooving blade 14 is provided with a cutting edge 14a slightly protruding radially outward from the outer peripheral surface of the annular body 22. It is fixed with bolts 28. In addition, a pair of receiving blades 16.16 sandwich a spacer 30, which is slightly thicker than the groove cutting blade 14, on the left side (same side as the groove cutting blade 14) of the ring body 24 fixed to the receiving blade shaft 20. It is attached with bolts 32. Then, by rotating the slotter shaft 18 and the receiving blade shaft 20 in mutually opposite directions, the groove cutting blade 14 enters between the receiving blades 16, 16, and the corrugated paperboard sheet 12 fed between the two blades 14 and 16. The required slotting process is applied to the As shown in FIG. 7, feeding rollers 34 and 34 are disposed vertically on the upstream and downstream sides of the groove cutting means 10, respectively, and the main feeding of the corrugated cardboard sheet 12 is performed by these feeding rollers 34. be done.

Problems to be Solved by the Invention As mentioned above, in general, the corrugated cardboard sheet 12 often needs to be subjected to required printing before being subjected to the reasing and slotting processes necessary for making the box.
However, some users who currently use flexographic printer slotters sometimes request that the printed corrugated cardboard sheets 12 be allowed to pass through the device as they are and be discharged to the outside without being subjected to slotting processing. In such a case, the slotter shaft 18 is raised to a position where the groove cutting blade 14 does not come into contact with the corrugated cardboard sheet 12, and the sheet 12 is passed through and discharged in a state in which slotting cannot be performed.

However, in this case, a complicated mechanism is required to raise the slotter shaft 18, and there is a drawback that the width dimension of the corrugated board sheet 12 that can be fed by the slotter is limited. That is, the feeding of one corrugated cardboard sheet 12 is carried out by feed rollers 34 and 34 disposed upstream and downstream of the slotter shaft 18 and receiving blade shaft 20, respectively, and ring bodies 22 disposed on the shafts 18 and 20, respectively. 24. Therefore, when slotting the sheet 12, the corrugated cardboard sheet 12 is compressed by the ring bodies 22 and 24,
Since the sheet 12 can be fed while cutting grooves, the minimum width of the sheet 12 is determined by the distance 2. (See Figure 7).

However, when the slotter shaft 18 is raised once, the corrugated paperboard sheet 12 is no longer fed by the two rings 22 and 24, and therefore the minimum width dimension of the sheet 12 that allows feeding is inevitably required. is the center-to-center distance mix (ix=z
gt), and a sheet 12 having a width shorter than this cannot be fed.

Another method is to slide all the rings 22 on the slotter shaft 18 and move them toward the frame, thereby defining an area in the center of the sheet feeding area where the grooving blade 14 does not interfere with the corrugated sheet 12. Attempts have also been made to pass the corrugated cardboard sheet 12 through this region. However, even in this case, the sheet 12 cannot be fed under pressure by the ring bodies 22 and 24, and the disadvantage that the width dimension of the corrugated board sheet 12 is still limited remains.

Therefore, the corrugated sheet 12 is fed by a circumference other than the area where the groove cutting blade 14 provided on the ring body 22 is disposed. There is a drawback that it can only be applied. Furthermore, it is also possible to remove all the grooving blades 14 disposed on the slotter, but in this case, for example, when manufacturing A-type (JIS standard) corrugated boxes, 4 grooving blades 14 are removed per slotter shaft 18. Since the grooving blade 16 is required, a total of eight grooving blades 14 must be removed, which poses a problem of extremely complicated and time-consuming work.

It is also possible to move the slotter unit laterally away from the flexo printer slotter and remove it from the line, but in this case, a space is required to install the unit removed from the line, and in addition, the flow of the line The disadvantage is that it requires work to stop the system, which is time-consuming.

Purpose of the Invention The present invention has been proposed in order to suitably solve the various drawbacks of the above-mentioned grooving device. It is an object of the present invention to provide a means for easily feeding the line without stopping the line operation for a long time without being limited by the dimensions of the line.

Means for Solving the Problems In order to overcome the above-mentioned problems and suitably achieve the intended purpose, the present invention provides a slotter shaft that rotates in mutually opposite directions in synchronization with the feeding speed of the sheet material. and a receiving blade shaft are disposed in a vertical relationship, a grooving blade is disposed in relation to the ring body disposed on the inlet pick shaft, and a pair of groove cutting blades are disposed in relation to the ring body disposed on the receiving blade shaft. In a grooving device configured such that receiving blades are arranged at predetermined intervals in the axial direction and grooves are formed in a sheet-like material under the cooperative action of the grooving blades and the receiving blades, the axial center is aligned with the slotter shaft. an eccentric member that is offset and inserted, a holder that is rotatably fitted loosely around the outer periphery of the eccentric member and that identifies the grooving blade so that its cutting edge protrudes outward in a radial direction, and the holder that is attached to the eccentric member. By rotating the holder by a predetermined angle with respect to the eccentric member, the cutting edge of the grooving blade fixed to the holder is rotated in a radial direction from the annular body. It is characterized by being configured so that a position protruding outward and a position facing radially inward can be selected.

Embodiment Next, a preferred embodiment of the sheet material grooving device according to the present invention will be described below with reference to the accompanying drawings. Regarding the same members already shown in the slotter according to the conventional example explained in relation to FIGS. 7 and 8,
They will be designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 is a front sectional view of a grooving device according to the present invention,
FIG. 2 is a sectional view taken along the line ■-n in FIG. 1.

As shown in the drawings, the slotter shaft 18 is connected to the slotter shaft 18 through a key 36 and a locking mechanism (not shown).
An annular body 22 is disposed so as to be movable and adjustable by a required distance in the axial direction of the rotor 8, and an eccentric member 38 is disposed on the right side of this annular body 22 (in FIG. 2). This eccentric member 3
8 is set so that its axis C2 is offset by a distance e with respect to the axis C1 of the slotter shaft 18, and is extrapolated to the entrance pick shaft 18, as clearly shown in FIG. The ring body 22 and the eccentric member 38 have, as shown in FIG.
Through holes 22a and 38a are formed at corresponding positions, respectively, and a spline shaft 40 constituting a rotation means to be described later is inserted into these through holes 22a and 38a. Also, the eccentric member 38
A circumferential groove 38b is bored on the outer periphery of the side of the ring body 22 that contacts the side surface of the annular body 22, and a gear 46 disposed on the spline shaft 40 faces into the circumferential groove 38b.

A holder 42 is rotatably fitted loosely around the outer periphery of the eccentric member 38, and an internal gear 42a is formed on the inner peripheral surface of the holder 42 corresponding to the circumferential groove 38b provided in the eccentric member 38. (See Figure 4). Further, an annular regulating member 44 is fixed to the eccentric member 38, and the regulating member 44 and the ring body 22 are connected to each other.
A holder 42 is held between the two to regulate the position in the axial direction. The holder 42 is dimensioned so that when the outer circumference of the eccentric member 38 is rotated, its outer circumferential surface does not protrude outward in the radial direction from the outer circumferential surface of the annular body 22.

As shown in the drawing, a fan-shaped grooving blade 14 having a cutting edge 14a projecting outward in the radial direction is identified in the holder 42, and this grooving blade 14 cooperates with receiving blades 16, 16, which will be described later. Under the action, the corrugated sheet 12 can be slotted. Here, the length of the groove cutting blade 14 protruding from the outer peripheral surface of the holder 42 is
18 degrees around the eccentric member 38 by a rotating means to be described later.
.

A position where the cutting edge 14a protrudes radially outward beyond the outer peripheral surface of the ring body 22 when rotated (see Fig. 1)
and a position facing radially inward (see FIG. 6).

As shown in Figures 2 and 3, the slotter frame (
(not shown) parallel to the slotter axis 18,
A spline shaft 40 constituting a rotating means for the holder 42
is provided, and this spline shaft 40 is connected to the slotter shaft 18.
With the rotation of the slotter shaft 18, the slotter shaft 18 can revolve around the slotter shaft 18. The spline shaft 4o is provided with a gear 46, as described above, at a position facing the circumferential groove 38b formed in the eccentric member 38. ! ! , 46 and the internal gear 42a of the holder 42 mesh with each other. As a result, if the spline shaft 4o is rotated in a predetermined direction, the gear 4
6 and the internal gear 42a.

The holder 42 can be rotated about the length of the eccentric member 38.

Further, since the teeth *, 46 are arranged to be slidable in the axial direction of the spline shaft 4o, when the order of the corrugated cardboard sheet 12 is changed, the ring body 22 and the eccentric member 38 can be moved along the slotter shaft 18. When the gear 46 is moved in that direction, the gear 46 also moves in the axial direction.

As described above, the slotter shaft 18 is provided with a ring body 22, an eccentric shaft 38, and a plurality of groove cutting blades 14 arranged in relation to the ring body 22 and eccentric shaft 38.
However, one spline shaft 40 is commonly inserted therethrough. Therefore, by rotating one spline shaft 40, all the grooving blades 14 disposed on the slotter shaft 18 can be simultaneously rotated with respect to the eccentric shaft 38.

Although not shown, the Tffi movement mechanism of the spline shaft 40 includes, for example, a gear disposed at the shaft end of the spline shaft 4o, and an internal gear meshed with the gear disposed on the frame, so that both gears are always meshed. In this state, the slotter shaft 18 is rotated together with the slotter shaft 18. When moving the position of the groove cutting blade 14, the rotation of the slotter shaft 18 is stopped and the internal gear is rotated by the drive device. As a result, the gear meshing with the internal gear rotates, and the spin shaft 4
0 and the gear 46 that meshes with the internal gear 42a of the holder 42 are rotated, and the holder 42 can rotate around the outer circumference of the eccentric member 38.

The mechanism on the side that receives the grooving blade 14 has the same configuration as the conventional one, and the ring body 24 is fixed to the receiving blade shaft 20 via a fixing key 48 and a locking mechanism (not shown). A pair of receiving blades 16, 16 are fixed to this ring body 24 with bolts 82 while holding the spacer 30 between them. By inserting the groove cutting blade 14 between the receiving blades 16, 16, it is possible to cut a long and narrow groove in the corrugated cardboard sheet 12.

The diameter of the spacer 30 is set to a size that does not interfere with the grooving blade 14 when the grooving blade 14 enters between the receiving blades 16, 16, as shown in the figure.

Next, the actual use of the groove cutting device according to this embodiment configured as described above will be explained. First, when slotting the printed corrugated cardboard sheet 12, as shown in FIG.
4a is set to protrude radially outward beyond the outer periphery of the ring body 22. When the slotter shaft 18 and the receiving blade shaft 20 are rotated in mutually opposite directions in this state, the fifth
As shown in the figure, the cutting edge 14a of the grooving blade 14 is connected to the double receiving blade 16.
. At this time, the corrugated sheet 12 is inserted into the slotter shaft 18
Since the sheet 12 is held between the circumferential rings 22 and 24 disposed on the receiving blade shaft 20, the sheet 12 is reliably fed.

Next, when the printed corrugated cardboard sheet 12 is passed through the slotter without being subjected to slotting processing and discharged outside the machine, the spline shaft 40 is moved clockwise by the aforementioned driving means (not shown). Rotate it. here,
A gear 46 disposed on the spline shaft 40 and the holder 42
The holder 42 is rotated clockwise around the outer periphery of the eccentric member 38 because the holder 42 is in mesh with the internal gear 42a of the eccentric member 38. As shown in FIG. 6, when the holder 42 is rotated 180 degrees, the cutting edge 14a of the grooving blade 14 disposed on the holder 42 is located inside the ring body 22 in the radial direction, and both shafts 18 , 20. When the rotation of the spline shaft 40 is stopped, the holder 4
2 is fixed in position on the eccentric member 38. As mentioned above, the slotter shaft 18 is provided with a plurality of grooving blades 14, but each of the grooving blades 14 is connected to the common spline shaft 4.
0, the switching work can be done in a short time.

When the slotter starts operating with the above-mentioned adjustments made, both shafts 18 and 20 start rotating, but the grooving blade 14 cuts the cardboard sheet 12 fed between the shafts 18 and 20. , and therefore the sheet 12 is not slotted.
Since there is no fluctuation of 2.24 trttt, the corrugated sheet 12 can be fed by the circumferential ring 22.24.

Effects of the Invention As described above, according to the grooving device for sheet material according to the present invention, the holder with the grooving blade fixed thereto can be easily rotated by a predetermined angle around the eccentric member. You can choose whether or not to use slotting. Furthermore, even if slotting is not performed, corrugated cardboard sheets can be fed without any problems, so it is possible to handle short sheets, and changeover can be done quickly, improving work efficiency. It has beneficial effects such as being able to

[Brief explanation of the drawing]

The drawings show an embodiment of the groove cutting device for sheet material according to the present invention, and FIG. 1 is a front sectional view of the groove cutting device according to the present invention, and FIG. ■ Line cross section, 3rd
The figure is a partially cutaway perspective view showing the schematic configuration of the device shown in Figure 1, Figure 4 is a sectional view taken along line I'/-I'/ in Figure 2, and Figure 5 shows the slotter in the state shown in Figure 1. FIG. 6 is a partial front sectional view showing a state in which the shaft is rotated by 180 degrees, FIG. 6 is a partial front sectional view showing only the holder in the state shown in FIG. A front sectional view of such a groove cutting device, FIG. 8 is a right side view of FIG. 7. 12... Corrugated cardboard sheet 14... Grooving blade 14a... Cutting edge 18...
Slotter axis 20...Blade axis '22.2
4... Ring body 38... Eccentric member 4
o...Spline shaft 42...Holder
42a... Internal gear 46... Gear patent applicant Isowa Iron Works Co., Ltd. -■ FIG, 3 1 jj FIG, 4 FIG, 5 FIG, 6 /-n

Claims (1)

[Scope of Claims] [1] A slotter shaft (18) and a receiving blade shaft (20) that rotate in mutually opposite directions in synchronization with the feeding speed of the sheet material (12).
) are disposed in a vertical relationship, and a grooving blade (14) is disposed in relation to the ring body (22) disposed on the slotter shaft (18), and a groove cutting blade (14) is disposed in relation to the annular body (22) disposed on the slotter shaft (18). The arranged ring (2
A pair of receiving blades (16, 16) are arranged at a predetermined interval in the axial direction on the sheet material (12, 16) under the cooperative action of the groove cutting blade (14) and the receiving blade (16, 16). ), an eccentric member (38) is fitted onto the slotter shaft (18) with its axial center offset, and an eccentric member (38) is rotatably mounted on the outer periphery of the eccentric member (38). a holder (42) that is loosely fitted and fixes the grooving blade (14) so that its cutting edge (14a) projects outward in the radial direction; and the holder (42) is rotated relative to the eccentric member (38). The holder (42) is rotated by a predetermined angle with respect to the eccentric member (38) by the rotation means (40, 42a, 46). The cutting edge (14a) of the grooving blade (14) fixed to the ring body (22) can be selected between a position protruding radially outward from the ring body (22) and a position facing radially inward. A grooving device for sheet material, characterized by: [2] The rotating means includes a spline shaft (40) disposed parallel to the slotter shaft (18), a gear (46) disposed slidably in the axial direction of the spline shaft (40), The gear (4) is formed on the inner peripheral surface of the holder (42).
6) and an internal gear (42a) meshing with the groove cutting device for sheet material according to claim 1.