JPH0755472B2 - Grooving device for sheet material - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grooving device for sheet-like materials, and more specifically, to a grooving device for performing a required thin slice on a corrugated board sheet to obtain a blank for box making. The present invention relates to a grooving device capable of smoothly feeding a sheet without restricting the sheet size even when the sheet is simply passed without grooving.

Prior Art In order to make a corrugated cardboard sheet cut into a predetermined length, it is necessary to obtain a blank in which the sheet is subjected to required groove cutting (slotting) and vertical ruled lines (creasing) in advance, A composite device called a flexographic printer slotter is preferably used for that purpose. This device is configured by arranging units such as a flexographic printing machine, a creaser, and a slotter in series, and performs required printing on corrugated cardboard sheets that pass through these units and performs various processes such as creasing and slotting. It is designed to be applied sequentially.

Since the present invention relates to an improvement of a groove cutting device (hereinafter also referred to as "slotter"), a schematic mechanism of this slotter will be described first. FIG. 7 shows a slotter incorporated in the flexographic printer slotter. This slotter has a groove cutting blade 14 and two blades 16, 1 arranged in a vertical relationship.
A groove cutting means 10 composed of 6 and 6 is provided inside. By horizontally feeding the corrugated cardboard sheet 12 between the groove cutting blade 14 and the receiving blade 16, the required slotting process is applied to the end portion of the sheet 12 in the width direction. Cardboard sheet
Since the slot 12 needs to be subjected to a plurality of slotting processes in the width direction, two slotters are arranged in series in the flow direction of the corrugated board sheet 12.

In the slotter frame (not shown), as shown in FIG. 7, a slotter shaft 18 and a blade shaft 20 that rotate in opposite directions in synchronization with the feeding speed of the corrugated board sheet 12 are arranged in a vertical relationship. It is arranged. On both shafts 18 and 20, ring bodies 22 and 24 each made of a disk having a predetermined thickness are respectively set bolts 2 facing each other.
Mounted by 6. The distance between the two ring bodies 22, 24 is set in advance so as to be equivalent to the paper thickness of the corrugated board sheet 12, whereby the corrugated board sheet 12 supplied between the both ring bodies 22, 24 is sandwiched downstream. It can be delivered to.

As shown in FIG. 8, an annular body 22 fixed to the slotter shaft 18 is provided.
On the left side of the blade, the cutting edge is radially outward from the outer peripheral surface of the ring body 22.
A sector-shaped groove cutting blade 14 is fixed by a bolt 28 by slightly projecting 14a. Further, a pair of receiving blades 16, 16 are provided on the left side of the ring body 24 fixed to the receiving blade shaft 20 (on the same side as the groove cutting blade 14).
However, the bolts 32 are attached with the spacer 30 having a thickness slightly larger than that of the groove cutting blade 14 sandwiched therebetween. 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 and 16, and the corrugated cardboard sheet 1 fed between the both blades 14 and 16 is fed.
The required slotting process is applied to 2. As shown in FIG. 7, feed rollers 34, 34 are arranged in an up-and-down relationship on the upstream side and the downstream side with the grooving means 10 interposed therebetween, and these feed rollers 34 mainly feed the corrugated board sheet 12. It

Problems to be Solved by the Invention As described above, in general, the corrugated paperboard sheet 12 often needs to be subjected to the required printing before the creasing process and the slotting process required for the box making. However, some users who are currently using the flexographic printer slotter sometimes request that the printed corrugated cardboard sheet 12 be directly passed through the apparatus and discharged to the outside without being subjected to the slotting process. 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 board sheet 12, and the sheet 12 is allowed to pass and be discharged in a state where slotting cannot be performed.

However, in this case, there is a drawback that a complicated mechanism for raising the slotter shaft 18 is required and the width dimension of the corrugated board sheet 12 to which the slotter can be fed is limited. That is, the feeding of the corrugated cardboard sheet 12 is performed by the feed rollers 34, 34 respectively arranged on the upstream side and the downstream side of the slotter shaft 18 and the receiving blade shaft 20, and the respective ring bodies 22, arranged on the shafts 18, 20. 24 and by. Therefore, sheet slotting
When applied to 12, the corrugated cardboard sheet 12 is pinched by the ring members 22 and 24, and the sheet 12 can be fed while cutting the groove, so that the minimum width dimension of the sheet 12 is set to the ring members 22 and 24. each distance to the center from the center of the feed rollers 34, 34 l ₁ (7
(See the figure).

However, when the slotter shaft 18 is raised, the corrugated paperboard sheet 12 is no longer fed by the two ring bodies 22, 24. Therefore, the sheet 12 that inevitably enables feeding
The minimum width dimension of the both feed rollers 3 located on the upstream side and the downstream side of the sheet 12 in the feeding direction with the groove cutting means 10 interposed therebetween.
The distance between the centers of 4 and 34 is l ₂ (l ₂ = 2l ₁ ), and the sheet 12 having a width dimension shorter than this cannot be fed.

As another means, all the ring bodies 22 are slid on the slotter shaft 18 and moved to the frame side, whereby an area where the groove cutting blade 14 does not interfere with the corrugated cardboard sheet 12 is defined in the central portion of the sheet feeding area. Attempts have also been made to pass the corrugated cardboard sheet 12 in this area. But even in this case,
It is impossible to press and feed the sheet 12 by the ring members 22 and 24, and the problem that the width dimension of the corrugated board sheet 12 is still limited remains.

Therefore, the corrugated board sheet 12 is fed by a circumference other than the area where the groove cutting blades 14 arranged in the ring body 22 are arranged. This is an extremely short corrugated board sheet.
There is a drawback that can be applied only to 12. Further, it is possible to remove all the groove cutting blades 14 arranged on the slotter,
In this case, for example, when manufacturing an A type (JIS standard) cardboard box, four groove cutting blades 16 are required for one slotter shaft 18, so a total of eight groove cutting blades 14 must be removed. However, there is a problem that it is an extremely complicated and time-consuming operation.

It is also possible to laterally retract the slotter unit from the flexographic printer slotter to remove it from the line, but in this case, a space for installing the unit removed from the line is required, and the flow of the line is also added. There is a disadvantage that it takes time to stop the work.

OBJECT OF THE INVENTION The present invention has been proposed in order to suitably solve the above-mentioned drawbacks existing in the grooving device, and when slotting is not required, the sheet-shaped material It is an object of the present invention to provide a means capable of easily feeding a line without stopping the operation of the line for a long time without being limited in size.

Means for Solving the Problems In order to overcome the above-mentioned problems and preferably achieve the intended purpose, the present invention provides a slotter shaft that rotates in mutually opposite directions in synchronization with the feeding speed of a sheet material. And the receiving blade shaft are arranged in a vertical relationship, the groove cutting blade is arranged in relation to the ring body arranged on the slotter shaft, and a pair of receiving members is arranged on the ring body arranged on the receiving blade shaft. In a grooving device configured to dispose the blades at predetermined intervals in the axial direction and perform the grooving of the sheet-like material under the cooperation of the grooving blade and the receiving blade, the axis center is eccentric to the slotter shaft. An eccentric member that is positioned and externally inserted, a holder that is rotatably fitted around the outer periphery of the eccentric member, and that holds the groove cutting blade so that its cutting edge projects outward in the radial direction; And a rotation means for rotating the holder by a rotation means to rotate the holder to a predetermined position with respect to the eccentric member. By rotating the blade at an angle, the cutting edge of the groove cutting blade fixed to the holder can be selected from a position projecting radially outward from the ring body and a position facing radially inward. Characterize.

Embodiments Next, a groove cutting device for a sheet material according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. Regarding the same members already mentioned in the slotter according to the conventional example described with reference to FIGS. 7 and 8,
The same reference numerals are used for the description, and detailed description thereof will be omitted.

FIG. 1 is a front sectional view of a groove cutting device according to the present invention,
FIG. 2 is a sectional view taken along the line II-II in FIG. As shown in the drawing, an annular body 22 is arranged on the slotter shaft 18 via a key 36 and a lock mechanism (not shown) so that the annular body 22 can be moved and adjusted by a required distance in the axial direction of the slotter shaft 18. An eccentric member 38 is arranged on the right side (in FIG. 2) of the ring body 22. As clearly shown in FIG. 1, the eccentric member 38 is set so that its axis C ₂ is displaced from the axis C ₁ of the slotter shaft 18 by a distance e, and the eccentric member 38 is extrapolated to the slotter shaft 18. Has been done. As shown in FIG. 2, the ring body 22 and the eccentric member 38 are provided with through holes 22a, 38a at corresponding positions, and the through holes 22a, 38a are provided with a spline which constitutes a rotating means described later. The shaft 40 is inserted. Further, a peripheral groove 38b is formed in the outer periphery of the side where the eccentric member 38 contacts the side surface of the ring body 22,
In the circumferential groove 38b, the gear 4 arranged on the spline shaft 40
6 is facing.

A holder 42 is rotatably fitted around the outer periphery of the eccentric member 38, and a circumferential groove 38b of the holder 42 is provided in the eccentric member 38.
An internal gear 42a is formed on the inner peripheral surface corresponding to (see FIG. 4). An annular restricting member 44 is fixed to the eccentric member 38, and the holder 42 is sandwiched between the restricting member 44 and the annular body 22 to restrict the position in the axial direction. The holder 42 is set to have a size such that the outer peripheral surface of the holder 42 does not project radially outward from the outer peripheral surface of the ring body 22 when the outer peripheral surface of the eccentric member 38 is rotated.

As shown in the drawing, a fan-shaped groove cutting blade 14 having a blade tip 14a protruding outward in the radial direction is fixed to the holder 42, and the groove cutting blade 14 and receiving blades 16, 16 described later cooperate with each other. Under,
The corrugated cardboard 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 1 when the holder 42 is rotated 180 ° around the eccentric member 38 by a rotating means described later.
Dimension that 4a can be selected as either a position that projects radially outward from the outer peripheral surface of the ring body 22 (see FIG. 1) or a position that faces radially inward (see FIG. 6) It is set in advance.

As shown in FIGS. 2 and 3, between the slots (not shown) of the slotter, parallel to the slotter shaft 18,
A spline shaft 40, which constitutes a rotating means of the holder 42, is provided, and the spline shaft 40 can revolve around the slotter shaft 18 as the slotter shaft 18 rotates. On the spline shaft 40, the gear 46 is arranged at a position facing the circumferential groove 38b formed in the eccentric member 38 as described above, and the gear 46 and the internal gear 42a of the holder 42 mesh with each other. Accordingly, when the spline shaft 40 is rotated in a predetermined direction, the holder 42 is rotated around the eccentric member 38 under the meshing action of the gear 46 and the internal gear 42a.

Further, since the gear 46 is slidably arranged in the axial direction of the spline shaft 40, the ring body 22 and the eccentric member 38 are attached to the slotter shaft 18 when the order of the corrugated board sheet 12 is changed.
When moved axially along, the gear 46 also moves axially therewith.

As mentioned above, the slotter shaft 18 has an annular body 22, an eccentric shaft 3
8 and a plurality of groove cutting blades 14 arranged in relation to this are arranged, with respect to each ring body 22 and eccentric shaft 38, 1
The spline shaft 40 of the book is commonly inserted. Therefore, by rotating one spline shaft 40, all the groove cutting blades 14 arranged on the slotter shaft 18 can be simultaneously rotated with respect to the eccentric shaft 38.

As a drive mechanism of the spline shaft 40, although not shown, for example, a gear is arranged at the shaft end of the spline shaft 40, and an internal gear that meshes with this gear is arranged in the frame, and both gears are always meshed. In the state, it is rotated together with the slotter shaft 18. When the position of the groove cutting blade 14 is moved, the rotation of the slotter shaft 18 is stopped and the internal gear is rotated by the drive device. As a result, the gear that meshes with the internal gear rotates, and the gear 46 that meshes with the spline shaft 40 and the internal gear 42a of the holder 42 rotates.
The holder 42 can rotate on the outer circumference of the eccentric member 38.

The mechanism on the side that receives the groove cutting 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 fixed key 48 and a lock mechanism (not shown). This ring 24
Further, the pair of receiving blades 16 and 16 are fixed by the bolts 32 while the spacer 30 is sandwiched. Then, by inserting the groove cutting blade 14 between the both receiving blades 16 and 16, the cardboard sheet 12
An elongated groove can be opened. The diameter of the spacer 30 is set so that the groove cutting blade 14 does not interfere with the groove cutting blade 14 when the groove cutting blade 14 enters between the receiving blades 16, 16 as shown in the drawing.

Next, the actual use of the grooving device according to this embodiment having the above-described configuration will be described. First, in the case where the printed corrugated cardboard sheet 12 is subjected to slotting, as shown in FIG.
Is set so as to project radially outward from the outer circumference of the ring body 22. When the slotter shaft 18 and the blade receiving shaft 20 are rotated in the opposite directions in this state, the cutting edge 14a of the groove cutting blade 14 enters between the blades 16, 16 as shown in FIG.
A required slotting process is performed on the corrugated cardboard sheet 12 fed between the shafts 18 and 20. At this time, the corrugated cardboard sheet 12 is a double ring body provided on the slotter shaft 18 and the blade receiving shaft 20.
Since the sheet 12 is nipped by the sheets 22, 24, the sheet 12 is reliably fed.

Then, when the printed corrugated cardboard sheet 12 is passed through the slotter and discharged out of the machine without being subjected to the slotting process, the spline shaft 40 is rotated clockwise by the driving means (not shown) described above. Rotate to. Here, the gear 46 disposed on the spline shaft 40 and the internal gear of the holder 42
Since it is meshed with 42a, this causes the holder 42 to rotate clockwise around the outer periphery of the eccentric member 38. Then, as shown in FIG. 6, when the holder 42 is rotated 180 °, the holder 4
The cutting edge 14a of the groove cutting blade 14 arranged in 2 is located radially inward of the ring body 22 and does not interfere with the corrugated board sheet 12 fed between the shafts 18 and 20. Then, when the rotation of the spline shaft 40 is stopped, the holder 42 is positionally fixed on the eccentric member 38 under the meshing of the gear 46 and the internal gear 42a. As described above, the slotter shaft 18 is provided with a plurality of groove cutting blades 14, but each groove cutting blade 14 has a common spline shaft.
Since it is moved by 40, the switching operation can be performed in a short time.

When the operation of the slotter is started with the above adjustments, both shafts 18 and 20 start to rotate, but the groove cutting blade 14 causes the corrugated cardboard sheet 12 fed between the shafts 18 and 20. The sheet 12 is not slotted. Here, since the positions of the ring bodies 22 and 24 do not change, the corrugated board sheet 12 can be fed by both ring bodies 22 and 24.

Effect of the Invention As described above, according to the sheet-shaped material grooving device of the present invention, the holder to which the grooving blade is fixed is simply operated by rotating the holder around the eccentric member by a predetermined angle. The presence or absence of slotting can be selected. Moreover, even if slotting is not performed, the corrugated cardboard sheet can be fed without any trouble, so that it can be used for short sheets, and the switching can be performed quickly, improving work efficiency. There is a beneficial effect such as being able to.

[Brief description of drawings]

The drawings show one embodiment of the grooving device for sheet-like material according to the present invention. Fig. 1 is a front sectional view of the grooving device according to the present invention, and Fig. 2 is II- of Fig. 1. II sectional view, 3rd
1 is a partially cutaway perspective view showing a schematic configuration of the apparatus shown in FIG. 1, FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2, and FIG. 7 is a partial front sectional view showing a rotated state, and FIG. 6 is a partial front sectional view showing a state where only the holder is rotated 180 ° in the state shown in FIG.
FIG. 8 is a front sectional view of a groove cutting device according to the prior art, and FIG. 8 is a right side view of FIG. 12 …… Corrugated sheet, 14 …… Grooving blade 14a …… Blade edge, 18 …… Slotter shaft 20 …… Receiving blade shaft, 22,24 …… Annular body 38 …… Eccentric member, 40 …… Spline shaft 42 …… Holder, 42a …… Internal gear 46 …… Gear

Claims (2)

[Claims] 1. A slotter shaft (18) and a blade shaft (2) that rotate in opposite directions in synchronization with the feeding speed of a sheet material (12).
0) is arranged in a vertical relationship with the slot body (22) arranged on the slotter shaft (18) in relation to the groove body (14), and the receiving blade shaft (20) A pair of receiving blades (16, 16) are axially arranged at predetermined intervals on the ring body (24) arranged in A grooving device configured to perform grooving of a sheet-like material (12) below, an eccentric member (38) externally inserted with a shaft center eccentric to the slotter shaft (18), and the eccentric member (38). A holder (42) rotatably fitted around the outer circumference of the groove cutting blade (14) so that the cutting edge (14a) of the groove cutting blade (14) projects outward in the radial direction; and an eccentric member (38) for the holder (42). ) Rotating means (40, 42a, 46) for rotating the holder (42) by the rotating means (40, 42a, 46) by a predetermined angle with respect to the eccentric member (38). By letting the Da cutting edge of fixed slotting blade (42) (14) (14a)
The sheet-shaped material grooving device is configured so that a position protruding radially outward from the ring body (22) and a position facing radially inward can be selected. 2. The rotating means comprises a spline shaft (40) arranged parallel to the slotter shaft (18) and a gear (46) slidably arranged in the axial direction of the spline shaft (40). And the gear (46) formed on the inner peripheral surface of the holder (42).
The grooving device for a sheet-like material according to claim 1, characterized in that it comprises an internal gear (42a) meshing with the internal gear (42a).