JPH0645354Y2 - Blade height adjustment device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a cutting processing apparatus for obtaining a blank for box making by performing a required grooving and slicing on a corrugated cardboard sheet and changing the order of the processed sheet according to the order change. The present invention relates to a blade height adjusting device that can adjust the protruding height of a groove cutting blade or a square cutting blade even when the thickness changes, and can shorten the cycle time accompanying an order change.

(Prior Art) In order to make a corrugated cardboard sheet cut into a predetermined length, as shown in FIG. 17, prior to that, the sheet is subjected to required groove cutting (slotting) and vertical ruled lines (creasing), At the same time, it is necessary to obtain a blank 1 in which the margin 1a is cut into diagonal corners if necessary. A device (generally referred to as a flexographic printer slotter) that is preferably used for that application is configured by arranging units such as a flexographic printing machine, a creaser, and a slotter in series, and is required for a corrugated cardboard sheet that passes through these units. In addition to the printing, the creasing and other processes such as slotting and slicing are sequentially performed.

Since the present invention relates to an improvement of a grooving device (hereinafter also referred to as "slotter") having a square cutting blade, a schematic mechanism of this slotter will be described first. FIG. 13 shows a slotter incorporated in a flexographic printer slotter as the above-mentioned compound device. This slotter comprises a groove cutting blade 14 and two receiving blades 16, 16 arranged in a vertical relationship. It has 10 inside. By horizontally supplying the corrugated cardboard sheet 12 between the groove cutting blade 14 and the receiving blade 16, the sheet 12
The required slotting process is applied to the end portion in the width direction of the. Further, as shown in the drawing, feed rollers 34, 34 are respectively arranged in an up-and-down relationship on the upstream side and the downstream side across the groove cutting means 10, and the feed rollers 34 feed the corrugated board sheet 12.

As shown in FIG. 14, the slotter frame (not shown) has a slotter shaft 18 and a blade shaft 20 that rotate in opposite directions in synchronization with the supply speed of the corrugated board sheet 12 in a vertical relationship. It is arranged. On both shafts 18 and 20, ring bodies 22 and 24 made of discs having a predetermined thickness are set bolts 2 facing each other.
Mounted by 6. The distance between the two ring bodies 22 and 24 is appropriately adjusted so as to be equivalent to the paper thickness of the corrugated board sheet 12 to be processed, so that the corrugated board sheet 12 supplied between the both ring bodies 22 and 24 is sandwiched. It can be fed downstream.

On the left side of the annular body 22 fixed to the slotter shaft 18, the annular body is
A sector-shaped groove cutting blade 14 is fixed by bolts 28 with a blade tip 14a slightly protruding outward in the radial direction from the outer peripheral surface of 22. Further, on the left side of the annular body 24 fixed to the receiving blade shaft 20 (on the same side as the groove cutting blade 14), the pair of receiving blades 16 and 16 are provided with the groove cutting blade 1.
It is attached with bolts 32 while holding a spacer 30 slightly thicker than 4. Then, by rotating the slotter shaft 18 and the blade shaft 20 in mutually opposite directions,
The groove cutting blade 14 is inserted between the receiving blades 16 and 16, and the both blades 1
A required slotting process is performed on the corrugated cardboard sheet 12 fed between 4 and 16.

In order to manufacture, for example, an A-type (JIS standard) cardboard box, it is necessary to process the cardboard sheet 12 as shown in FIG. Therefore, the slotter shaft 18 has four groove cutting blades 14
And the square cutting blade 50 is attached to one of the groove cutting blades 14 arranged on the outermost side in the axial direction. That is, thirteenth
As shown in the figure, a corner cutting holder 52 is disposed so as to be movable in the circumferential direction with respect to the groove cutting blade 14, and the corner cutting blade 50 orthogonal to the groove cutting blade 14 is attached to the holder 52. The ring-shaped body 22 is attached so that the ring-shaped body 50a projects radially outward from the outer peripheral surface of the ring body 22 by a predetermined length.

Further, an anvil 17 having the same width dimension as that of the square cutting blade 50 is disposed on the receiving blade shaft 20 facing the square cutting blade 50, and the cutting edge 50a of the square cutting blade 50 contacts the outer peripheral surface of the anvil 17. In contact with each other, the corrugated cardboard sheet 12 is subjected to required corner cutting processing. In addition,
The diameter of the anvil 17 is set to the same size as the receiving blade 16 (see FIG. 14). The corner cutting blade 50 is disposed so as to be movable in the radial direction with respect to the holder 52, and the corrugated cardboard sheet 12 according to the order change is adjusted by appropriately adjusting the protrusion amount of the blade edge 50a from the outer peripheral surface of the ring body. It is possible to cope with the change of the thickness dimension of.

(Problems to be Solved by the Invention) The corrugated board sheet 12 has various standards such as single-sided corrugated board, double-sided corrugated board, and double-sided corrugated board, and the thickness dimensions are different according to the standard. As described above, although the thickness dimension varies depending on the standard, the same grooving device has been conventionally used for grooving these various sheets 12.

However, the corner cutting blade 50 disposed in the groove cutting device having the above-described structure is subjected to the corner cutting by bringing the cutting edge 50a into contact with the outer peripheral surface of the anvil 17. Therefore, when changing the order, by moving the receiving blade shaft 20 by an appropriate moving means and adjusting the distance between the two ring bodies 22 and 24 to correspond to the paper thickness of the processed sheet, the cutting edge 50a of the square cutting blade 50 It was necessary to adjust the amount of protrusion incidentally.

For example, when the order is changed from a double-sided corrugated board sheet (Fig. 13) to a double-sided corrugated board sheet (Fig. 15), first, the slotter shaft 18 is rotated by a required angle, and the square cutting blade disposed on the groove cutting blade 14 is rotated. Move 50 to a workable position. In this state, the operator manually inserts the cutting edge of the square cutting blade 50.
Adjust the protruding height of 50a. At this time, since the adjustment is not performed in the state where the cutting edge 50a is actually in contact with the anvil 17, the slotter shaft 18 is rotated after the adjustment, and the cutting edge 50a of the square cutting blade 50 is suitable for the anvil 17. It is necessary to confirm whether or not they come into contact with each other (see Fig. 16). If the proper adjustment is not made,
It was necessary to readjust the protruding height of 50a, which was extremely complicated and time-consuming. Further, the adjustment of the square cutting blade 50 must be performed in a narrow space inside the device, which is a dangerous work.

Further, the adjustment of the square cutting blade 50 must be always performed when the thickness dimension of the sheet 12 is changed, and it is the current situation that a lot of time is required for the manual adjustment work.
However, in the corrugated board manufacturing industry where it is necessary to cope with order changes accompanying complicated small-lot production as it is now, it is extremely important to shorten the cycle time in the adjustment work. It did not fully respond to the request.

Further, the amount of protrusion of the cutting edge 14a of the groove cutting blade 14 from the outer peripheral surface of the annular body requires complicated manual work, and cannot be easily adjusted. Therefore, in the conventional grooving device, even in the corrugated cardboard sheets 12 having different thickness dimensions, in order to be able to perform the slotting process commonly to all of them, the cutting edge 14a of the grooving blade 14
The protrusion height from the outer circumferential surface of the ring body was set in advance to a dimension that allows optimal slotting for a sheet having the largest thickness dimension, for example, double-sided corrugated board. Regardless of the thickness of the cardboard sheet 12, the groove cutting blade 14
It is empirically known that the corrugated paperboard sheet 12 can be provided with a sharp cut groove by setting the depth l ₁ (see FIG. 14) entering between 16 and 16 to be about 2 mm.

However, when the thickness of the corrugated cardboard sheet 12 is changed due to the order change, as shown in FIGS. 14 and 16, the size of the groove cutting blade 14 between the receiving blades 16 and 16 is l ₁ to l ₂ (l It changes to ₁ <l ₂ ). Therefore, the cut end of the groove lacks sharpness and becomes dirty, which causes a problem of quality deterioration.

(Object of the Invention) The present invention has been proposed in order to preferably solve the above-described various drawbacks existing in the height adjustment of the blade in the groove cutting device, and the thickness dimension of the sheet-shaped material. It is an object of the present invention to provide a means capable of shortening the cycle time by rapidly adjusting the height of the blade when the blade is changed.

(Means for Solving the Problems) In order to overcome the above-mentioned problems and preferably achieve the intended purpose, the present invention is arranged in a vertical relationship with a sheet feeding path sandwiched therebetween. A slotter shaft and a receiving blade shaft that rotate in mutually opposite directions in synchronism with the feeding speed of the sheet-shaped material, an annular body concentrically arranged on the slotter shaft, and concentrically arranged on the receiving blade shaft. And a square cutting blade provided on the ring body of the slotter shaft so as to project outward in the radial direction, and an anvil arranged concentrically on the ring body of the receiving blade shaft, and the square cutting blade. In a processing device configured to perform corner cutting processing on the sheet-like material in cooperation with an anvil, the slotter shaft is rotatably loosely fitted to the outer circumference of a ring arranged in the annular body of the slotter shaft. An eccentric cam that is displaced with respect to the axis of the holder, and a holder that is rotatably supported by the ring body. A square cutting blade whose blade edge is arranged to project outward in the radial direction and whose bottom surface is slidably mounted on the outer peripheral cam surface of the eccentric cam, and the eccentric cam that rotates with respect to the ring. And a rotating means for moving the eccentric cam with respect to the ring, whereby the cutting edge of the square cutting blade arranged in the holder is radially outward from the outer peripheral surface of the annular body. It is characterized in that the amount of protrusion is adjusted.

Similarly, in order to overcome the above-mentioned problems and preferably achieve the intended purpose, another invention of the present application is to arrange the sheet-shaped material in a vertical relationship with a sheet feeding path interposed therebetween, and to feed the sheet-shaped material. A slotter shaft and a receiving blade shaft that rotate in mutually opposite directions in synchronism with the feed rate, an annular body that is concentrically fixed to the slotter shaft, and an annular body that is concentrically fixed to the receiving blade shaft. A groove cutting blade provided on the annular body of the slotter shaft so as to project outward in the radial direction, and a receiving blade concentrically fixed to the annular body of the receiving blade shaft, and the groove cutting blade and the receiving blade. In the processing device configured to perform grooving processing on the sheet-shaped material under the cooperative action of, the shaft of the slotter shaft is rotatably loosely fitted to the outer periphery of a ring disposed on the annular body of the slotter shaft. An eccentric cam that is eccentric to the center and a pressing plate that is clamped by the ring body and moves in the radial direction. A groove cutting blade that is movably disposed and has an engaging portion formed at the lower end thereof swingably fitted in an eccentric groove formed in the eccentric cam, and a rotation blade that rotates the eccentric cam with respect to the ring. When the eccentric cam is rotated with respect to the ring by the rotating means, the cutting edge of the groove cutting blade movably arranged on the ring body is radially outward from the outer peripheral surface of the ring body. It is characterized in that it is configured so that the amount of protrusion toward one side can be adjusted.

(Effect of the Invention) In the first invention in which the sheet-shaped material is square-cut, after moving the square-cutting blade to a position where it does not interfere with the anvil,
The receiving blade shaft is moved closer to the slotter shaft, and the distance between the two ring-shaped bodies arranged on both shafts is adjusted to about the thickness of the sheet material. Then, when the eccentric cam is rotated in the predetermined direction on the outer circumference of the ring by the rotating means, the square cutting holder is rotated in the required direction, and the protrusion height of the cutting edge of the square cutting blade from the outer peripheral surface of the ring body is adjusted. You can do it.

Also, in the second invention for grooving a sheet material,
The receiving blade shaft is moved closer to or away from the slotter shaft, and the distance between the two ring-shaped bodies arranged on both shafts is adjusted to the thickness of the double-sided sheet material. When the eccentric cam is rotated around the outer periphery of the ring in a predetermined direction, the groove cutting blade is slidably fitted in the eccentric groove formed in the eccentric cam, so that the groove cutting blade moves in the radial direction. Then, the height of the blade edge protruding from the outer peripheral surface of the ring body is adjusted.

(Embodiment) Next, a blade height adjusting device according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments.
The same members already described in the slotter according to the conventional example described with reference to FIGS. 13 to 16 are designated by the same reference numerals, and detailed description thereof will be omitted.

(Regarding the Configuration of the Adjusting Device According to the First Invention) FIG. 1 is a front sectional view showing the adjusting device according to the first invention, and FIG. 2 is a sectional view taken along line II-II of FIG. . As shown in the drawing, an annular body 22 is disposed on the slotter shaft 18 via a key 36 and a lock mechanism (not shown) so as to be movable and adjustable by a required distance in the axial direction of the slotter shaft 18. . This ring 22 is, as shown in FIG.
Large-diameter portion 22 for feeding the corrugated cardboard sheet 12 in cooperation with
It is composed of a and a small diameter portion 22b protruding to the left of the large diameter portion 22a, and a ring 38 is externally fitted to the small diameter portion 22b. The ring 38 is integrally fixed to the ring body 22 by fixing a fixing member such as a bolt (not shown).

As shown in FIG. 1, the ring 38 is set so that its axis C ₂ is offset from the axis C ₁ of the slotter shaft 18 by a required distance. This is because the diameter of the ring 38 is set to be small when the turning means for the eccentric cam 44, which will be described later, is arranged, so that the mechanism can be downsized. That is, the ring of FIG.
Although 38 is drawn as a so-called eccentric ring, such eccentricity is not necessarily a requirement and may be concentric with the slotter shaft 18. In the ring body 22 and the ring 38,
As shown in FIG. 2, through holes 22c and 38a are formed at the corresponding positions, and a spline shaft 40 that constitutes a turning means described later is inserted into these through holes 22c and 38a. Further, an annular groove 22d is bored on the side surface of the annular body 22 that comes into contact with the side surface of the ring 38, and the annular gear 22d faces the gear 42 arranged on the spline shaft 40. It is slidably furnished.

An eccentric cam 44 having a shaft center C ₃ which is displaced by a distance e from the shaft center C _{2 of the} ring 38 is rotatably fitted around the outer periphery of the ring 38. That is, the ring 38 shown in FIG.
Is an eccentric ring as described above, the axis C ₃ of the eccentric cam 44 is drawn so as to be deviated from the axis C ₂ of the ring 38. However, since the ring 38 may be concentric with the slotter shaft 18, in this case, the axis C ₃ of the eccentric cam 44 may be deviated from the axis C ₁ of the slotter shaft 18. It will be good. The eccentric cam 44 has a ring 22
The internal gear 46 facing the annular groove 22d is fixed by the bolt 48, and the eccentric cam 44 is configured to rotate around the outer periphery of the ring 38 integrally with the internal gear 46. As shown in FIG. 2, the internal gear 46 projects inward in the radial direction from the inner peripheral surface of the eccentric cam 44, and this projecting portion is the ring 38 and the annular groove.
The position of the eccentric cam 44 is regulated in the axial direction by being sandwiched by 22d.

On the outer circumference of the end of the eccentric cam 44 where the internal gear 46 is disposed, a cut portion 44a concentric with the ring 38 is formed.
The fan-shaped groove cutting blade 14 is fixed to the ring body 22 in a state where the bottom surface of the groove cutting blade 14 is in stable contact. Therefore, as described later,
Even if the eccentric cam 44 is rotated around the outer circumference of the groove 38, the groove cutting blade 14 that abuts the breaking portion 44a is not moved by the cam action of the eccentric cam 44. This groove cutting blade 14 has a cutting edge 14a.
Is arranged so as to project radially outward from the outer peripheral surface of the ring body 22 by a required height, and the corrugated cardboard sheet 12 is subjected to slotting processing in cooperation with the receiving blades 16, 16 described later. ing.

As shown in FIG. 2 and FIG. 3, a square cutting holder 52 is arranged on the ring body 22 while being mounted on the outer peripheral surface of the eccentric cam 44 with the groove cutting blade 14 interposed therebetween. Grooving blade 14
A square cutting blade 50 orthogonal to is attached. In this square cut holder 52, a collar 54 is inserted into an arc-shaped long groove 52a formed in the holder 52, and a bolt 56 inserted into a through hole of the collar 54 is screwed into the groove cutting blade 14 and the ring body 22. It is installed by doing. In particular, as clearly shown in FIG. 5, a slight gap is formed between the flange 54a formed at the end of the collar 54 and the holder 52 facing the flange 54a. Therefore, the holder 52 can rotate within the required angle range with the bolt 56 as a fulcrum.

Further, a stopper 58 is arranged on the ring body 22 radially outward of the position where the dicing holder 52 is arranged, and the stopper 58 regulates the rotation range of the dicing holder 52. Stopper 58
A pressing pin 60 projecting inward in the radial direction is provided on the inner surface of the slicing holder 52 opposed to the slicing holder 52. The pressing pin 60 is elastically attached to the slicing holder 52 by a compression spring 62 as shown in FIG. Are abutted against each other. That is, the diced holder 52 is
The pressing pin 60 constantly presses the outer periphery of the eccentric cam 44, and prevents the holder 52 from moving during processing.

A spline shaft 40, which constitutes a rotating means of the eccentric cam 44, is arranged in parallel with the slotter shaft 18 between frames of the slotter (not shown). The spline shaft 40 rotates with the rotation of the slotter shaft 18. And is configured to revolve around the slotter shaft 18. The spline shaft 40 is provided with the gear 42 as described above at a position facing the annular groove 22d bored in the ring body 22, and is fixed to the gear 42 and the eccentric cam 44 so that the same ring groove 22d is formed. The facing internal gear 46 meshes with it. Thus, when the spline shaft 40 is rotated in a predetermined direction, the eccentric cam 44 rotates around the ring 38 under the meshing action of the gear 42 and the internal gear 46.

Since the gear 42 is slidably arranged in the axial direction of the spline shaft 40, the ring body 22 and the ring 38 are moved in the axial direction along the slotter shaft 18 when the order of the corrugated board sheet 12 is changed. When this happens, the gear 42 also moves axially with it.

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. And when adjusting the protrusion amount of the square cutting blade 50,
The rotation of the slotter shaft 18 is stopped and the internal gear is rotated by a drive device. As a result, the gear that meshes with the internal gear rotates, the gear 42 that meshes with the spline shaft 40 and the internal gear 46 of the eccentric cam 44 rotates, and the eccentric cam 44 can rotate on the outer periphery of the ring 38. Become.

The mechanism on the side for receiving the groove cutting blade 14 has the same structure as the conventional one, and the ring body 24 is fixed to the receiving blade shaft 20 by the fixing key 49 and a locking mechanism (not shown). This ring 24
The pair of receiving blades 16 and 16 are fixed by bolts 32 with the spacer 30 held therebetween. 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.

In addition, at a position facing the square cutting blade 50, the anvil 17
Are fixed and fixed by the bolts 32, and the cutting edge 50a of the square cutting blade 50 is brought into contact with the outer peripheral surface of the anvil 17 so that the corrugated cardboard sheet 12 is subjected to the required square cutting process.

(Regarding Operation of First Invention) Next, with respect to the operation of the first invention, the actual use thereof will be described. As shown in FIG. 6, when the slotter shaft 18 and the receiving blade shaft 20 are rotated in opposite directions, the cutting edge 14a of the groove cutting blade 14 is rotated.
The double-sided corrugated cardboard sheet 12 fed between the two receiving blades 16 and 16 and fed between the two shafts 18 and 20 is subjected to the required slotting process. Further, by the square cutting blade 50 arranged in the ring body 22,
The corrugated cardboard sheet 12 is subjected to a slicing process for forming an allowance.

Next, if the order is changed, double-sided corrugated sheet will be used with the device.
When performing slotting and slicing processing on 12, the slotter shaft 18 is first rotated to move the slicing blade 50 to a position where it does not interfere with the anvil 17 as shown in FIG. Then, the receiving blade shaft 20 is moved closer to the slotter shaft 18 by a required moving mechanism, and the distance between the two ring bodies 22 and 24 arranged on both shafts 18 and 20 is set to the double-sided corrugated cardboard sheet 12. Adjust to the equivalent of the paper thickness. Also, the spline shaft 40,
It is rotated in a predetermined direction by the driving means (not shown) described above. Here, since the gear 42 arranged on the spline shaft 40 and the internal gear 46 arranged on the eccentric cam 44 mesh with each other,
As a result, the eccentric cam 44 is rotated around the outer circumference of the ring 38 in a predetermined direction.

Since the eccentric cam 44 is eccentric with respect to the ring 38 by a predetermined distance as described above, the slicing holder 52 pressed and supported on the outer periphery of the eccentric cam 44 is rotated by the eccentric cam 44 so that the bolt 56 is rotated. Rotate in the required direction with the fulcrum as the fulcrum. Then, the protrusion height of the cutting edge 50a of the square cutting blade 50 from the outer peripheral surface of the ring body is the spline shaft at the time when it becomes the smallest.
Stop 40.

Next, the slotter shaft 18 is rotated, and as shown in FIG.
After moving the cutting edge 50a of the square cutting blade 50 to a position orthogonal to the anvil 17, the spline shaft 40 is rotated again. The rotation of the spline shaft 40 rotates the eccentric cam 44,
The square cutting holder 52 is rotated so that the square cutting blade 50 projects outward in the radial direction. Then, when the cutting edge 50a comes into contact with the anvil 17, the rotation of the spline shaft 40 is stopped. The eccentric cam 44 is positionally fixed on the ring 38 under the engagement of the gear 42 and the internal gear 46.

This adjustment work is performed by actually bringing the cutting edge 50a of the square cutting blade 50 into contact with the outer peripheral surface of the anvil 17, so that the square cutting blade 50 can be accurately adjusted with respect to the anvil 17 in a short time. Moreover, since this work is performed from outside the machine,
Workers can be freed from dangerous work.

(Regarding Adjusting Device According to Second Invention) FIG. 8 is a partially cutaway front view of the adjusting device according to the second invention.
FIG. 9 is a sectional view taken along line IX-IX in FIG. In the second invention, the groove cutting blades arranged on the slotter are configured to adjust the protruding height from the outer peripheral surface of the ring body, and the mounting structure of the eccentric cam, the rotating means and the like are the same as in the first invention. It is similar to the case of.

As shown in the figure, the ring 38 externally inserted into the small-diameter portion 22b of the ring body 22.
An eccentric cam 44 is rotatably fitted in the eccentric cam 44. A flange 64 is formed on the outer peripheral surface of the eccentric cam 44, and an annular groove 64a that is eccentric with respect to the ring 38 is formed on the end surface of the flange 64 that faces the ring body 22. An engaging portion 14b formed at a lower end of a groove cutting blade 14 described later is slidably engaged with the annular groove 64a, and the blade edge thereof is rotated as the eccentric cam 44 rotates.
The protrusion height of 14a from the outer peripheral surface of the ring body 22 is adjusted.

On the left side of the ring body 22, a fan-shaped groove cutting blade 14 is arranged so as to be radially movable with respect to the ring body 23 while being sandwiched between the ring body 22 and the pressing plate 66. That is, as shown in FIG. 8, long grooves 14c, 14c extending in the vertical direction are formed at predetermined positions of the groove cutting blade 22, and a ring 68 is loosely fitted in the long groove 14c. Then, the groove cutting blade 14 is attached by screwing the bolt 70, which is commonly inserted into the through holes of the pressing plate 66 and the ring 68, to the ring body 22. Where the ring 68
The thickness dimension of is set to be slightly thicker than the thickness dimension of the groove cutting blade 14, thereby forming a slight gap between the ring body 22 and the holding plate 66, and the groove cutting blade 14 has the long groove 14c. , 14c
It is configured to be movable in the radial direction by the length of.

Further, as shown in FIG. 10, the holding plate 66 has a female screw hole 66a.
And a disc spring 72 is disposed at a position facing the groove cutting blade 14 of the female screw hole 66a. The disc spring 72 is screwed into the female screw hole 66a and is pressed against the groove cutting blade 14 by a set screw 74. Therefore, even if a gap is formed between the ring body 22 and the holding plate 66, the groove cutting blade 14 is pressed against the side surface of the ring body by the disc spring 72 and stably held, and is easily moved during the slotting process. It is configured not to do.

As shown in FIGS. 9 and 10, an engaging portion 14b is formed at the lower end of the groove cutting blade 14 so as to project in the arrangement direction of the eccentric cam 44. The engaging portion 14b is attached to the eccentric cam 44. It is slidably fitted in the formed annular groove 64a. This annular groove 6
Since 4a is eccentric with respect to the ring 38 as described above, the eccentric cam 44 is rotated around the outer periphery of the ring 38 via the rotating means, so that the groove cutting blade 1 that engages with the annular groove 64a.
4 moves in the radial direction along the long grooves 14c, 14c.

(Regarding Operation of Second Invention) Next, with respect to the operation of the second invention, the actual use thereof will be described. First, when performing slotting on the double-sided corrugated board sheet 12 with the slotter, as shown in FIG.
The dimension l ₁ of the cutting edge 14a of the groove cutting blade 14 that is inserted between the receiving blades 16 and 16 is set in advance so that the double-sided corrugated board sheet 12 can be optimally slotted. When the slotter shaft 18 and the receiving blade shaft 20 are rotated in opposite directions in this state, the cutting edge 14a of the groove cutting blade 14 enters between the receiving blades 16 and 16 and is fed between the shafts 18 and 20. The double-sided corrugated board sheet 12 is subjected to required slotting.

Next, if the order is changed, double-sided corrugated sheet will be used with the device.
When performing slotting on 12, first receive the blade 20
The moving mechanism is moved toward or away from the slotter shaft 18 to adjust the distance between the two ring members 22 and 24 arranged on the shafts 18 and 20 to the extent equivalent to the paper thickness of the double-faced corrugated cardboard sheet 12. Further, the spline shaft 40 is rotated in a predetermined direction by the driving means (not shown) described above. Here, since the gear 42 disposed on the spline shaft 40 and the internal gear 46 of the eccentric cam 44 mesh with each other, the eccentric cam 44 is thereby prevented from moving to the ring 38.
Is rotated in a predetermined direction.

As described above, since the engaging portion 14b of the groove cutting blade 14 is slidably fitted in the annular groove 64a of the flange 64 formed on the eccentric cam 44, the groove cutting blade 14 is configured to rotate the eccentric cam 44. Along with this, the ring 68 fitted in the long groove 14c is guided to move in the radial direction. Then, as shown in FIG. 12, the insertion dimension l ₂ of the cutting edge 14a of the groove cutting blade 14 between the receiving blades 16 and 16 allows the double-faced corrugated sheet 12 to be subjected to optimal slotting (l ₁ = l _{When 2} ) is reached, the rotation of the spline shaft 40 is stopped.

As described above, the slotter shaft 18 has a plurality of groove cutting blades 14
However, since the respective groove cutting blades 14 are moved by the common spline shaft 40, the switching work can be performed in a short time.

After starting the operation of the slotter after making the above adjustments, the double-sided corrugated sheet fed between the shafts 18 and 20 under the cooperation of the groove cutting blade 14 and the receiving blades 16 and 16. 12, the cutting edge is sharply slotted.

(Effects of the Invention) As described above, according to the blade height adjusting device of the present invention, when the thickness dimension of the sheet-shaped material is changed by changing the order, it is possible to simply rotate the eccentric cam. At work
It is possible to easily adjust the height at which the groove cutting edge and the square cutting edge protrude outward from the ring body in the radial direction. Moreover, since this work can be performed from the outside of the device, the worker can be freed from a complicated work that is dangerous, and the cycle time associated with the order change can be greatly shortened. Furthermore,
Since the grooving blade and the square cutting blade can be adjusted in the same state in which they are actually used, there is a beneficial effect such that accurate adjustment can be easily performed.

[Brief description of drawings]

1 is a front sectional view of a grooving device adopting the blade height adjusting device according to the first invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a device shown in FIG. FIG. 4 is an external perspective view showing the schematic configuration of FIG. 4, FIG. 4 is a schematic perspective view showing each member disposed on the slotter shaft in FIG. 3 in an exploded manner, and FIG. 5 is an enlarged cross-sectional view of the main part of the apparatus shown in FIG. , FIG. 6 is a partial front sectional view showing a state in which a double-sided corrugated board sheet is subjected to corner cutting processing, FIG. 7 is a partial front sectional view showing a state in which a double-sided corrugated board sheet is subjected to corner cutting processing, and FIG. A front sectional view of a groove cutting device adopting a blade height adjusting device according to a second invention, FIG. 9 is a sectional view taken along line IX-IX of FIG. 8, and FIG. 10 is a groove cutting blade in the device shown in FIG. FIG. 11 is a partial front sectional view showing a state in which a double-sided corrugated board sheet is subjected to slotting processing, 12 figure partial front sectional view showing a state of applying a slotting process on the corrugated fiberboard sheet, the
FIG. 13 is a front cross-sectional view showing a state in which a double-sided corrugated board sheet is slotted by a groove cutting device according to the related art,
FIG. 14 is a right side view showing the apparatus shown in FIG. 13 in which the square cutting blade is in contact with the outer peripheral surface of the anvil, and FIG.
FIG. 16 is a front cross-sectional view showing a state in which a double-faced corrugated board sheet is slotted by the device shown in FIG. FIG. 17 is a plan view of a blank that constitutes an A-type cardboard box. 12 …… Corrugated sheet, 14 …… Grooving blade 14a …… Blade edge, 16 …… Receiving blade 17 …… Anvil, 18 …… Slotter shaft 20 …… Receiving blade shaft, 22 …… Ring body 38 …… Ring, 40 ...... Spline shaft 42 …… Gear, 44 …… Eccentric cam 46 …… Internal gear, 50 …… Square cutting edge 50a …… Blade edge

Claims (2)

[Scope of utility model registration request] 1. A slotter shaft which is arranged in a vertical relationship with a feeding path of a sheet material (12) interposed therebetween and which rotates in mutually opposite directions in synchronization with a feeding speed of the sheet material (12). (18) and a blade shaft (20), an annular body (22) concentrically arranged on the slotter shaft (18), and an annular body (24) concentrically arranged on the blade shaft (20). ) And the ring body (22) of the slotter shaft (18)
Square cutting blade (50) that is provided so as to project radially outward
And an anvil (17) concentrically arranged on the ring body (24) of the receiving blade shaft (20), and the sheet is provided under the cooperation of the square cutting blade (50) and the anvil (17). In a processing device configured to perform square cutting on a material (12), a ring (38) arranged on the ring body (22) of the slotter shaft (18) is rotatably loosely fitted to the outer periphery of the ring (38). Slotter axis (1
8) The blade tip (50a) is projected outward in the radial direction by the eccentric cam (44) which is eccentric to the shaft center and the holder (52) which is rotatably supported by the ring body (22). A square cutting blade (50) that is disposed and has its bottom surface slidably mounted on the outer peripheral cam surface of the eccentric cam (44), and the eccentric cam (44) with respect to the ring (38). And a rotating means (40, 42, 46) for rotating the eccentric cam (44) with respect to the ring (38) by the rotating means (40, 42, 46). It is characterized in that the cutting edge (50a) of the square cutting blade (50) arranged in the holder (52) can be adjusted so as to adjust the amount of projection outward in the radial direction from the outer peripheral surface of the annular body (22). Tool height adjustment device. 2. A slotter shaft which is arranged in an up-and-down relationship with a feeding path of the sheet-shaped material (12) interposed therebetween and which rotates in mutually opposite directions in synchronization with the feeding speed of the sheet-shaped material (12). (18) and a blade shaft (20), an annular body (22) concentrically arranged on the slotter shaft (18), and an annular body (24) concentrically arranged on the blade shaft (20). ) And the ring body (22) of the slotter shaft (18)
Grooving blade (14) provided on the base so as to project radially outward
And a receiving blade (16) concentrically arranged on the ring body (24) of the receiving blade shaft (20), the groove cutting blade (14) and the receiving blade (1).
In a processing device configured to perform groove cutting on the sheet-like material (12) in cooperation with 6), a ring (38) disposed on the ring body (22) of the slotter shaft (18) The slotter shaft (1
8) An eccentric cam (44) that is eccentric to the axis, and a retaining plate (66) that is sandwiched between the ring body (22) and movably arranged in the radial direction. Eccentric groove (64a) with the joint (14b) formed in the eccentric cam (44)
A groove cutting blade (14) slidably fitted to the ring and rotation means (40, 42, 46) for rotating the eccentric cam (44) with respect to the ring (38). By rotating the eccentric cam (44) with respect to the ring (38) by rotating means (40, 42, 46), the groove cutting blade (14) movably arranged on the ring body (22). Cutting edge (14
A blade height adjusting device characterized in that a) is configured so as to be able to adjust the amount of protrusion from the outer peripheral surface of the annular body (22) in the radial direction.