JP6999492B2 - Sheet product splitter - Google Patents

Description

The present invention relates to a splitter that splits a corrugated board sheet stack into blank stacks along a cut line.

In the manufacture of corrugated cardboard products, in order to make effective use of the material, the corrugated cardboard sheet of the material is punched out so that multiple blanks are connected via a cut line having a joint, and a large number of these sheets are stacked. A step of dividing a heavy body into a blank product weight along a cut line to obtain a blank of a product may be adopted.

As a splitter that divides a sheet product into a blank product in such a manufacturing process, the applicant proposes the one described in Patent Document 1 below.

As shown in FIG. 10, this splitter supplies the sheet stacking bodies 100 to the upper surfaces of the adjacent base conveyors 51 and 52, and presses plates 3 and 3 on both sides of the sheet stacking bodies 100 with the cut line 101 sandwiched between them. While holding down from above by 4, one of the base conveyors 51 is swung by the swing cylinder 11, and the roller 14 is made to rise up the ramp 15, so that the sheet stack 100 is placed along the cut line 101, and the blank stack 102, After being divided into 103, it is sent out from the base conveyors 51 and 52.

In this splitter, one pressing plate 3 is suspended and supported on the fixed frame 10 side via an elevating cylinder 16, and the elevating cylinder 16 is suspended and supported on the fixed frame 10 side and the pressing plate 3 side via rotating shafts 17 and 18, respectively. It is linked. Then, the pressing plate 3 swings independently of the base conveyor 51, so that the sheet stack 100 can be supplied even from the side of the base conveyors 51 and 52.

Japanese Unexamined Patent Publication No. 2016-132075

However, Patent Document 1 has not presented a mechanism capable of converting the supply direction of the sheet stack 100 and the discharge direction of the blank stacks 102 and 103 after the split into the inside of the splitter.

Further, in this splitter, since the sheet stack 100 is pressed from above by the pressing plates 3 and 4 in a state where the sheet stack 100 is placed on the belts of the base conveyors 51 and 52, there is a problem that dented press marks are likely to remain on the sheet stack 100. was there.

Further, when the downstream side of the base conveyors 51 and 52 is a conveyor curved with a small radius of curvature, if the feed of the base conveyors 51 and 52 is increased, the blank stack 102 discharged from the base conveyors 51 and 52 is discharged. , 103 may deviate from the conveyor.

Therefore, it is an object of the present invention to provide a splitter which is provided with a specific means for improving the degree of freedom of line arrangement in a factory and can efficiently divide a sheet stack without leaving scratches such as press marks. ..

In order to solve the above-mentioned problems, in the present invention, the sheet stacks are supplied to the upper surfaces of adjacent bases, and both side portions of the sheet stacks sandwiching the cut line are pressed from above by pressing plates. Then, the one base is swung so that the outer end portion away from the other base moves up and down, the sheet stack is divided into blank stacks along the cut line, and the blank stack is divided into the blank stacks. In the splitter of the sheet stack sent from the base,
The supply direction of the sheet stack to the base and the discharge direction of the blank stack from the base intersect with each other.
The base includes a table having a slot extending in the supply direction of the sheet stack, and a belt conveyor having a transport direction facing in the length direction of the slot, and the belt of the belt conveyor moves up and down as the belt conveyor moves up and down. The structure is such that the carrier side protrudes upward from the slot or sinks downward.
Above the base, a pusher that advances and retreats in the discharge direction of the sheet stack is provided.
With the belt conveyor of the base raised, the sheet stack is placed on the carrier side of the belt protruding upward from the slot, and the sheet stack is supplied above the table by feeding the belt. Being done
With the belt conveyor lowered and the sheet stack placed on the upper surface of the table, the sheet stack is pressed by the pressing plate.
After the sheet stack is divided into blank stacks along the cut line, the pressing of the sheet stack by the pressing plate is released.
The pusher was advanced, and the blank stack was pushed by the pusher and discharged.

Further, it is assumed that the slot is not located below the pressing center line of the pressing plate to which the elevating cylinder for pressing the sheet stack is connected to the base, and the upper surface of the table exists. I did.

Further, after the sheet stack is divided into blank stacks along the cut line,
The base belt conveyor rises once and is slightly driven, the blank stacks are separated from each other, and the belt conveyor descends again.
After that, the blank product was pushed by the pusher and discharged.

Further, when it is detected by the discharge sensor that the blank stack is pushed by the pusher and reaches the discharge side end portion of the base.
The forward speed of the pusher was reduced, and the blank stack was slowly sent out from the base.

Further, the blank stack pushed by the pusher started to be conveyed by the feed mechanism to the downstream process located on the discharge end side of the base, and the push output of the pusher stopped acting on the blank stack. When that is detected by the separation sensor,
It was assumed that the pusher retracted and returned to the start position without reaching the end position of the stroke.

In the sheet product splitter according to the present invention, the transport direction of the belt conveyor for supplying the sheet product and the advancing / retreating direction of the pusher for discharging the blank product after division intersect with each other. The transport direction of the sheet stack on the discharge side is changed, the degree of freedom of line arrangement in the factory can be improved, and it can be applied to factories with various layouts.

Further, since the sheet stack is pressed by the pressing plate on the table instead of on the belt of the belt conveyor, the press mark is less likely to remain on the blank stack.

Further, after the sheet stack is divided into blank stacks, the belt conveyor of one of the bases is slightly reversely driven to separate the blank stacks from each other. Therefore, the contact between the blank stacks causes the end of the blank to be separated. The flap part etc. will not be scratched.

Then, when the blank stack reaches the discharge side end of the base, the advance speed of the pusher is lowered so as to be slower than the transport speed of the feed mechanism to the downstream process, and the blank stack is transferred to the downstream process. Since the feed mechanism slowly feeds out from the base, even if the conveyor on the downstream side of the base is curved with a small radius of curvature, the deviation of the blank stack is prevented.

Further, when the blank stack starts to be conveyed by the feed mechanism to the downstream process, the pusher retracts and returns to the start position without reaching the end position of the stroke, so that the cycle time can be shortened and the productivity can be shortened. Can be improved.

Overall bird's-eye view of the splitter of the sheet stack according to the embodiment of the present invention. FIG. 1 is a schematic cross-sectional view taken along the line II showing the supply state of the sheet stack as above. FIG. 1 is a schematic cross-sectional view taken along the line II of FIG. 1 showing a pressed state of the sheet stack as above. FIG. 1 is a schematic cross-sectional view taken along the line II of FIG. 1 showing a split operation of the sheet stack as described above. FIG. 1 is a schematic cross-sectional view taken along the line II of FIG. FIG. 1 is a schematic cross-sectional view taken along the line II-II of FIG. FIG. 1 is a schematic cross-sectional view taken along the line II-II of FIG. 1 showing the first stage of discharging the blank product as above. FIG. 1 is a schematic cross-sectional view taken along the line II-II of FIG. 1 showing the second stage of discharging the blank stack as above. FIG. 1 is a schematic cross-sectional view taken along the line II-II of FIG. 1 showing the return operation of the pusher as above. Schematic cross-sectional view showing the split operation of the splitter described in Patent Document 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, in this splitter, the sheet stacking body 100 is supplied to the upper surfaces of the bases 1 and 2 adjacent to each other in parallel, and the pressing plates 3 hold both side portions sandwiching the cut line 101 of the sheet stacking body 100, respectively. While being pressed from above by 4 and 4, the one base 1 is swung so that the outer end portion away from the other base 2 moves up and down, and the sheet stack 100 is moved along the cut line 101 as a blank stack. It is divided into 102 and 103.

The sheet stacking body 100 is obtained by punching out a corrugated cardboard sheet with a die cutter to form a sheet 104 in which blanks 105 of two corrugated cardboard boxes are connected via a cut line 101 having a connecting portion, and a large number of the sheets 104 are stacked. Is. Then, when the sheet stack 100 is divided into the blank stacks 102 and 103 by this splitter, the blank 105 separated for each cardboard box can be obtained.

In this splitter, the bases 1 and 2 and the pressing plates 3 and 4 are provided inside the box-shaped fixed frame 10.

A roller conveyor 31 for supplying the sheet stack 100 is provided on the upstream side of the splitter, and a roller conveyor 32 for transporting the blank stacks 102 and 103 to the downstream process is provided on the downstream side of the splitter. The supply direction of the sheet stack 100 from the upstream side of the splitter to the bases 1 and 2 and the discharge direction of the blank stacks 102 and 103 from the bases 1 and 2 to the downstream side intersect at 90 °. There is.

A motor roller 5 is provided between the discharge ends of the bases 1 and 2 and the roller conveyor 32 as a feed mechanism for the blank stacks 102 and 103.

A swing cylinder 11 which is an air cylinder is provided below one of the bases 1. As shown in FIG. 2, the swing cylinder 11 is tilted outward toward the upper side, is fixed to the lower beam of the fixed frame 10 at a predetermined angle, and the upper end portion thereof is connected to the outer end portion of the frame of the base 1 by the connecting shaft 12. It is rotatably connected via. Further, a plurality of linear guides 13 are arranged in parallel with the swing cylinder 11 in the same mounting manner.

Further, a roller 14 is rotatably provided on the lower side at the inner end portion of one base 1 located on the other base side, and below the roller 14 is rotatably provided on a support column rising from the lower beam of the fixed frame 10. , A ramp 15 that rises from the inside to the outside is provided.

Then, as shown in FIGS. 3 and 4, when the swing cylinder 11 is expanded and contracted, the outer end portion of the base 1 moves up and down so as to draw an arc-shaped locus, and the roller 14 rolls along the inclined path 15. It moves and the base 1 swings between a horizontal state and an upwardly inclined state about a virtual rotation axis located above the fixed frame 10.

On the other hand, the other base 2 has both ends fixed to the fixed frame 10 in the width direction and does not swing.

On the other hand, as shown in FIGS. 2 and 3, the pressing plates 3 and 4 are suspended and supported on the upper beam of the fixed frame 10 via an elevating cylinder 16 which is an air cylinder.

As shown in FIGS. 3 and 4, the upper portion of the elevating cylinder 16 is swingably connected to the upper beam of the fixed frame 10 via a rotating shaft 17, and the pressing plates 3 and 4 are connected to the lower portion of the elevating cylinder 16. Is oscillatingly connected via a rotating shaft 18.

As a result, the pressing plate 3 passively swings in contact with the sheet stack 100, independently of the swing of the base 1. It should be noted that only one of the pressing plates 3 actually swings in the split operation of the sheet stacking body 100.

Further, as shown in FIG. 1, a plurality of linear guides 19 are arranged in parallel with the elevating cylinder 16 in the same mounting manner, and the linear guides 19 swing in the same manner as the elevating cylinder 16. The pressing plates 3 and 4 are moved up and down according to the height of the sheet stacking body 100 by the expansion and contraction drive of the elevating cylinder 16.

Further, as shown in FIGS. 2 and 6, the bases 1 and 2 are conveyed in the length direction of the table 21 having a plurality of parallel slots 21a extending in the supply direction of the sheet stack 100 and the slots 21a. It includes a directional belt conveyor 22.

The upper surface of the table 21 is finished to be smooth in order to minimize friction with the sheet stack 100.

The belt conveyor 22 has a structure in which the belt conveyor 22 moves up and down by the operation of the elevating cylinder 23 having a short stroke, and the carrier side of the thin string-shaped belt 22a protrudes upward or sinks downward from the slot 21a as the belt moves up and down with respect to the table 21.

The drive pulley 22b that rotationally drives the belt 22a is located below the pressing center line of the pressing plates 3 and 4 to which the elevating cylinder 16 that presses the seat stacking body 100 is connected to the bases 1 and 2, and is located in this portion. The slot 21a is divided in the length direction so that the slot 21a is not located and the upper surface of the table 21 is present.

As shown in FIG. 6, a pusher 24 that advances and retreats in the discharge direction of the sheet stacking body 100 is provided above the bases 1 and 2. The pusher 24 is driven horizontally and moves along the guideway 24a and the guide rod 24b.

A discharge sensor 25 is provided on the portion of the bases 1 and 2 facing the discharge side end so as to be located above the outside of the motor roller 5. The discharge sensor 25 detects the blank stacks 102 and 103 that are pushed and conveyed by the pusher 24.

The pusher 24 is provided with a separation sensor 26. The separation sensor 26 detects that the blank stacks 102 and 103 have started to be conveyed by the motor roller 5 and have separated from the pusher 24.

An operation panel 27 for setting the operation of the splitter is provided on one upper side of the fixed frame 10. Further, an openable door 28 having a hinge at the lower portion is provided on one side surface of the fixed frame 10, and the door 28 is held horizontally in an open state so that the blank 105 can be inspected on the upper surface thereof. It has become.

When the sheet stack 100 is divided by using such a splitter, the bases 1 and 2 become horizontal, the belt conveyor 22 rises with respect to the table 21, and the pressing plates 3 and 3 are divided. With the 4 raised, the sheet stack 100 is placed on the belt 22a of the belt conveyor 22 from the roller conveyor 31 and fed.

Along with this, the sheet stacking body 100 is conveyed by the belt conveyor 22, and both side portions sandwiching the cut line 101 are transferred to the upper surfaces of the bases 1 and 2, respectively. In this state, the sheet stack 100 is slightly lifted from the upper surface of the table 21.

Next, as shown in FIG. 3, the belt conveyor 22 descends with respect to the table 21, and the elevating cylinder 16 extends with the sheet stacking body 100 placed on the upper surface of the table 21, and the pressing plate 3 , 4 descends, and the seat stack 100 is pressed from above so as not to move with respect to the bases 1 and 2.

Then, as shown in FIG. 4, the swing cylinder 11 extends, the outer end portion of the base 1 is pushed diagonally outward and upward, rises so as to draw an arcuate locus, and the roller 14 walks on the ramp 15. Ascending, the base 1 swings upward. At this time, the elevating cylinder 16 is pushed up to the base 1 via the seat stacking body 100 and slightly contracts.

By such an operation, the sheet stack 100 is bent upward with respect to the portion mounted on the base 2 with the cut line 101 as an axis, and the cut line 101 is formed. Since both side portions are separated and the connecting portion of the cut line 101 is broken, the blank product is divided into blank stacks 102 and 103 along the cut line 101.

After that, as shown in FIG. 5, as the elevating cylinder 16 contracts, the pressing plates 3 and 4 rise, while the belt conveyor 22 of one of the bases 2 rises, and the belt conveyor 22 is slightly reversed and driven. , The blank stacks 102 and 103 are separated from each other.

When the blank stacks 102 and 103 are separated from each other, the belt conveyor 22 of the base 1 may be driven in the forward rotation, but the belt conveyor 22 of the base 2 which is horizontally fixed without tilting may be reversed. When driven, the blank stacks 102 and 103 are stable, and the stacking state does not collapse.

After the sheet stack 100 is divided in this way, as shown in FIG. 6, the belt conveyor 22 of the base 2 descends again, the pressing plates 3 and 4 completely rise, and the blank stacks 102 and 103. Ready to discharge.

From this state, as shown in FIG. 7, the pusher 24 advances, and the blank stacks 102 and 103 are pushed by the pusher 24 at high speed in the discharge direction. Along with this, the blank stacks 102 and 103 slide along the smooth upper surface of the table 21 and quickly move toward the discharge ends of the bases 1 and 2.

Then, as shown in FIG. 8, when the discharge sensor 25 detects that the discharge side ends of the bases 1 and 2 have been reached, the forward speed of the pusher 24 decreases at a predetermined timing, and the blank stack is formed. 102 and 103 are slowly sent out from the bases 1 and 2.

After that, as shown in FIG. 9, the blank stacks 102 and 103 started to be conveyed by the motor roller 5, and the separation sensor 26 detects that the push output of the pusher 24 no longer acts on the blank stacks 102 and 103. Then, the pusher 24 retracts and returns to the start position without reaching the end position of the stroke.

In the splitter of the sheet stack as described above, the transport direction of the belt conveyor 22 for supplying the sheet stack 100 and the advancing / retreating direction of the pusher 24 for discharging the blank stacks 102 and 103 after division intersect with each other. Therefore, the transport direction of the sheet stacking body 100 on the supply side and the discharge side can be changed, the degree of freedom of line arrangement in the factory can be improved, and it is possible to correspond to a factory having various layouts.

Further, the sheet stack 100 is pressed by the pressing plates 3 and 4 not on the upper surface of the belt of the belt conveyor 22 but on the upper surface of the table 21, and there is no slot 21a below the elevating cylinder 16 on which the strongest pressing force acts. , Press marks are less likely to remain on the blank stacks 102 and 103.

Further, after the sheet stack 100 is divided into the blank stacks 102 and 103, the belt conveyor 22 of one of the bases 2 is slightly reversely driven to separate the blank stacks 102 and 103 from each other, so that the blank stack 102 is separated from each other. , 103 will not scratch the flap portion at the end of the blank due to contact with each other.

Then, when the blank stacks 102 and 103 reach the discharge side ends of the bases 1 and 2, the forward speed of the pusher 24 decreases so as to be slower than the transport speed of the motor roller 5, and the blank stack 102 , 103 are slowly sent out from the bases 1 and 2 by the motor rollers 5, so that even if the roller conveyor 32 on the downstream side of the bases 1 and 2 is curved with a small radius of curvature, the rollers of the blank stacks 102 and 103 Deviation from the conveyor 32 is prevented, and the line arrangement in the factory can be compactly organized.

Further, when the blank stacks 102 and 103 start to be conveyed by the motor rollers 5 on the downstream side of the bases 1 and 2, the pusher 24 retracts and returns to the start position without reaching the end position of the stroke, so that the cycle The time can be shortened and the productivity can be improved.

1, 2 Bases 3, 4 Pressing plate 5 Motor roller 10 Fixed frame 11 Swing cylinder 12 Connecting shaft 13 Linear guide 14 Roller 15 Slope 16 Elevating cylinder 17, 18 Rotating shaft 19 Linear guide 21 Table 21a Slot 22 Belt conveyor 22a Belt 22b Drive pulley 23 Lifting cylinder 24 Pusher 24a Guideway 24b Guide rod 25 Discharge sensor 26 Separation sensor 27 Operation panel 28 Door 31, 32 Roller conveyor 100 Sheet stacking body 101 Cut line 102, 103 Blank Stacking body 104 Sheet 105 Blank

Claims (5)

The sheet stack (100) is supplied to the upper surface of the adjacent bases (1, 2), and both side portions of the sheet stack (100) sandwiching the cut line (101) are pressed by pressing plates (3, 4), respectively. While being pressed from above, the one base (1) is swung so that the outer end portion away from the other base (2) moves up and down, and the sheet stack (100) is cut along the cut line (101). ) Is divided into blank stacks (102,103), and the blank stacks (102,103) are sent out from the base (1,2) in the splitter of the sheet stacks.
The supply direction of the sheet stack (100) to the base (1,2) intersects with the discharge direction of the blank stack (102,103) from the base (1,2).
The base (1,2) has a table (21) having a slot (21a) extending in the supply direction of the sheet stack (100), and the transfer direction is oriented in the length direction of the slot (21a). A belt conveyor (22) is provided, and the carrier side of the belt (22a) protrudes upward or sinks downward from the slot (21a) as the belt conveyor (22) moves up and down.
Above the bases (1, 2), pushers (24) that advance and retreat in the discharge direction of the sheet stack (100) are provided.
With the belt conveyor (22) of the base (1,2) raised, the sheet stack (100) is placed on the carrier side of the belt (22a) protruding upward from the slot (21a). , The sheet stack (100) is supplied above the table (21) by feeding the belt (22a).
With the belt conveyor (22) lowered and the sheet stack (100) placed on the upper surface of the table (21), the sheet stack (100) is moved by the pressing plates (3, 4). Pressed,
After the sheet stack (100) is divided into blank stacks (102,103) along the cut line (101), the pressing of the sheet stack (100) by the pressing plates (3,4) is released.
A sheet stack splitter comprising the pusher (24) advancing and the blank stack (102,103) being pushed and ejected by the pusher (24). In the splitter of the sheet stack according to claim 1, the pressing plate (3, 4) to which the elevating cylinder (16) for pressing the sheet stack (100) is connected to the base (1, 2). A sheet product splitter characterized in that the slot (21a) is not located below the pressing center line and the upper surface of the table (21) is present. In the sheet product splitter according to claim 1 or 2, after the sheet product (100) is divided into blank products (102,103) along the cut line (101).
The belt conveyor (22) of the base (2) is once raised and slightly driven, the blank stacks (102,103) are separated from each other, and the belt conveyor (22) is lowered again.
A splitter for the sheet stack, characterized in that the blank stack (102,103) is then pushed and ejected by the pusher (24). In the sheet product splitter according to any one of claims 1 to 3, the blank product (102,103) is pushed by the pusher (24) to the discharge side end of the base (1, 2). When the emission sensor detects that it has been reached from (25),
A sheet product splitter characterized in that the forward speed of the pusher (24) is reduced and the blank product (102,103) is slowly ejected from the base (1,2). In the sheet product splitter according to any one of claims 1 to 4, the blank product (102,103) pushed by the pusher (24) is located on the discharge end side of the base (1,2). When it is detected by the separation sensor (26) that the push output of the pusher (24) no longer acts on the blank product (102,103), it starts to be conveyed by the feeding mechanism to the downstream process.
A sheet product splitter characterized in that the pusher (24) retracts and returns to the start position without reaching the end position of the stroke.

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