JP2704367B2 - Fixed-rate feeding device for cardboard cases - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for feeding fixed quantity of a corrugated cardboard case in a corrugated cardboard box making machine, and more particularly to a corrugated cardboard case which has been formed into a predetermined shape and has been subjected to a gluing step and a folding step for a body. The present invention relates to an apparatus that collectively supplies a set number of sheets to a next binding step.

[0002]

2. Description of the Related Art In general, a corrugated cardboard box forming process includes a paper feeding process for supplying corrugated paper cut into a predetermined shape,
A printing process for performing necessary printing on a predetermined portion of the corrugated paper, a process for forming a predetermined cut groove and a bent portion, a gluing process for connecting a body portion, and folding and bonding of the glued paper. The main operation steps are a step, a step of stacking a predetermined number of the obtained cardboard cases and sending them to a binding machine, and a step of bundling the sent cardboard cases.

[0003] In the flexo folder gluer of the cardboard case, the configuration of the apparatus is composed of six steps: a sheet feeding section, a flexographic printing section, a groove cutting section, a glue folding section (folder section) counter section, and a binding section. I have. Usually, the gluing step of the body, the folding step and the gluing step of the glued paper are abbreviated as a folder gluer step, but the cardboard case 2 that has passed through the folder section 1 shown in FIG. Counting, stacking, and discharging of the stack are performed while passing from 3 to the discharging unit 4, the second stacking weighing unit 5, and the discharging unit 6, and a predetermined number of counter processes are completed, and all final finishing processes are completed. To be commercialized.

[0004] More specifically, the cardboard case 2 discharged from the folder portion 1 is collected in the first stacking portion 3 constituting the counter portion by the first cardboard case stack 2a already stacked. The corrugated cardboard case 2 is then corrected by the right angle straightening plate 6 which reciprocates in the traveling direction A of the cardboard case 2 so that the adhesive surface of the cardboard case 2 is accurately bonded.

[0005] A predetermined number of cardboard cases 2 are stacked 2a.
When only the lowermost corrugated cardboard case 2 of the stack 2a is continuously moved in the advancing direction A along the approaching line of the first stacking section 3, the first rubber belt 7 having a strong frictional force restricts the limit plate 8 After passing through the gap opened at the lower end surface of the, it enters the discharge unit 4, continues traveling, and arrives at the second accumulation weighing unit 5. The sensor 9 counts when entering the second stacking and measuring section 5, and when the number of the stacks 2a of the corrugated cardboard case 2 reaches a predetermined number, the air cylinder 10 is operated and the reciprocating operation of the push-out plate 11 and the second cycle. Due to the rotation of the second rubber belt 12, the aggregate 2a is collectively fed onto the third rubber belt 13 of the discharge section 6 at the next stage, and the process proceeds to the next binding step. 14 is a holding plate for applying an appropriate pressure to the stack 2a, and 14a and 14a are holding levers.

[0006]

However, such a conventional fixed quantity feeding device for a corrugated cardboard case has various problems as described below. That is, with the recent mass production, the traveling speed of the cardboard case 2 is 5
m, and a process that completes with a predetermined change over time, such as drying of glue or drying of printing ink, tends to hinder the overall production speed.

In particular, the stack 2a of the cardboard case 2 in the first stacking section 3 is sequentially stacked in the presence of a pressure 36 by a blower 35 as shown in an enlarged view in FIG. While the posture is being corrected, the stack is pressed by the weight of the stack 2a itself, so that the bonding from the lower part of the cardboard case 2 approaches the completion in a timely manner. Rubber belt 7
When moving to the next step through the lower part of the limiting plate 8, if there is a corrugated cardboard case 2 that is not sufficiently adhered, even if it tries to advance in the A direction by the first rubber belt 7 that contacts the lower surface, it contacts the upper surface. There is a problem that the progress is hindered by the friction with the next corrugated cardboard case 2, and the bonded portion of the corrugated cardboard case 2 is peeled off, and a “shift” phenomenon occurs in the bonded portion of the glue.

[0008] Such a "shift" phenomenon is a factor that hinders the progress of the subsequent steps, and also has a problem that the accuracy and strength of the product are adversely affected. This will be described in more detail. There are two types of the above-mentioned "displacement" depending on the type of the machine. As shown in Fig. 7, A is the width in the traveling direction, and L is the width in the traveling direction of the cardboard case 2. In this case, when the cardboard case 2 is “upside-printed / folded down”, the sheet is shifted to the “reverse C” shape by a distance a with respect to the bonding portion 15, and the cardboard case 2 is “printed down / folded up”. In the case of (1), the sheet is shifted to the “C” shape by the distance “b” with respect to the bonding portion 15 as shown in FIG.

As shown in FIG. 9 in an enlarged manner, the corrugated cardboard case 2 in which the above-mentioned inverted C-shaped "displacement" has occurred enters the second collecting / measuring section 5 by means of the first rubber belt 7, and the collecting body 2a
When the pushing plate 11 pushes the stack 2a with the operation of the air cylinder 10 after the measurement, the rear end portion of the corrugated cardboard case 2 pushes the pushing plate 1 as shown by the broken line C.
As a result, the cardboard case 2 does not come to a horizontal state, and the subsequent cardboard case 2 collides with the rear end of the corrugated cardboard case 2 in which the "displacement" has occurred, causing a trouble called "jam-up". . In the case of the corrugated cardboard case 2 displaced in a C shape, the upside down of the corrugated cardboard case 2 is reversed, but similarly, it is likely to cause a jam.

The corrugated cardboard case weighing and discharging apparatus shown in FIG. 5 includes a first collecting section 3, a discharging section 4 and a second collecting section.
It is composed of an accumulating and weighing unit 5 and a discharge unit 6, and the main parts of the apparatus are arranged in a plane, so that the overall length becomes long, and the installation occupation area in a factory or the like becomes large. is there.

Therefore, the present invention solves the above-mentioned disadvantages of the conventional fixed quantity feeding device for a corrugated cardboard case, so that even if the traveling speed of the corrugated cardboard case is increased, the adhesive such as glue drying or printing ink drying can be obtained. Corrugated cardboard case where the process does not hinder the overall production speed and eliminates the "displacement" phenomenon that easily occurs at the bonded part of the adhesive or the peeling of the adhesive part due to the unbonded cardboard case It is an object of the present invention to provide a fixed-quantity feeding device.

[0012]

According to the present invention, in order to achieve the above object, a corrugated cardboard case which has been molded into a predetermined shape and has been subjected to a gluing step and a folding step of a body has been set in advance in an accumulation section. An upper fork and a lower fork which are arranged so as to be able to enter and retreat into an accumulation section located in the traveling direction of the corrugated cardboard case, in a fixed-quantity feeding device configured to accumulate a predetermined number of sheets and supply the same to a next binding step. And a servomotor for controlling the movement of the upper and lower forks into and out of the stacking section, and a predetermined amount of a corrugated cardboard case, which is disposed below the lower fork and is vertically movable and stacked on the lower fork. A receiving table to which the aggregates are transferred, and a discharge conveyor with a lifting device for transporting the aggregates received on the receiving table to the next step. Become, times by the servo motor
Rolled gears on both upper and lower forks
The fork on one side
Moves in the direction of travel and the other fork moves backward
Provided is a fixed-rate feeding device for a corrugated cardboard case which is configured to move in a predetermined direction.

[0013] Also, above screwed a gear rotatably supported screw shaft to the servo motor to convey the torque of the geared motor, a servo motor with a change in the traveling direction width length of the corrugated board Is changed so that the protruding length of the upper fork and the lower fork into the collecting portion is appropriately changed.

[0014]

According to the fixed quantity feeding device for a cardboard case, when the cardboard case enters the collecting section, the cardboard case is formed as an appropriate integrated body on the upper fork by protruding the upper fork by a predetermined length in the traveling direction. Be loaded. At that time, by rotating the servo motor, the upper fork moves in the retreating direction at the same time as the lower fork moves in the advancing direction, and the stacked body loaded on the upper fork is moved to the lower fork, and further moved. Subsequent cardboard cases are continuously loaded on the lower fork.

When the number of the stacks reaches a predetermined number initially set, the lower fork moves in the retreating direction, and at the same time, the upper fork moves in the advancing direction and returns to the state of protruding toward the stacking section. Then, the stack is received by the receiving table arranged below the lower fork and waiting for ascending, and after being laid, the receiving table is lowered to be flush with the discharge conveyor with the lifting device, and the stack is moved to the next stage. Conveyed to the process.

The gear engaged with the servomotor is engaged with the upper fork and the lower fork at the same time. When changing the position of the servomotor, the torque of the geared motor is transmitted to the screw shaft via the gear. Thereby, it becomes possible to move the servo motor rotatably supported at the other end of the screw screw shaft to an optimum position in accordance with the traveling direction width of the corrugated cardboard case. The protrusion length can be changed.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment of a constant-rate feeding device for a cardboard case according to the present invention. In the side view of the main part of the present embodiment shown in FIG. 1, reference numerals 16 and 17 denote folding belts for transporting the cardboard case 2 from the folder section 1 to the first accumulation section 3, and 19 denotes a folding belt disposed in the first accumulation section 3. An upper fork, 20 is a lower fork disposed below the upper fork 19, 33 is a right angle straightening plate, 21 is A
The C servomotor 22 is a gear that rotates upon receiving the output of the AC servomotor 21. The gear 22 is located between the upper fork 19 and the lower fork 20 and meshes with both forks 19,20.

Reference numeral 23 denotes a receiving table which is disposed below the lower fork 20 and transfers the integrated body 2a of the cardboard case 2 from the lower fork 20. Reference numeral 24 denotes a cylinder which moves the receiving table 23 up and down as shown by an arrow D. , 2
Reference numeral 5 denotes a discharge conveyor with a lifting device, and the discharge conveyor 25 with the lifting device is a lifter 25a provided below.
As a result, it is possible to move up and down as shown by arrow E. 26 is a pressure conveyor. The arrow A in the figure is the direction of travel of the cardboard case 2, and the arrow B is the direction of retreat.

The operation of this embodiment will be described below.
First, the folding belt 16 in the folder 1
The corrugated cardboard case 2 that has passed between the upper and lower portions 17 enters the first stacking section 3 while being counted by the sensor 18. At this time, the upper fork 19 is moved from the folder section 1 toward the first stacking section 3 by the cardboard case 2. About 70 of full width L
% To 80% of the length of this upper fork 1
9, a predetermined number of cardboard cases 2 are received and stacked as an integrated body 2a.

In this embodiment, when five corrugated cardboard cases 2 are stacked as the stack 2a on the upper fork 19, the upper fork 19 is moved backward by the rotation of the gear 22 meshed with the AC servomotor 21 as shown in FIG. Go to
Since the gear 22 rotated by the AC servomotor 21 meshes with both the upper fork 19 and the lower fork 20 as described above, the lower fork 20 moves in the direction indicated by A at the same time as the upper fork 19 retreats in the B direction. Go to

Then, the five stacks 2a of the cardboard case 2 loaded on the upper fork 19 are transferred to the lower fork 20, and the subsequent cardboard case 2 is continuously moved to the lower fork. 20. The stack 2a is straightened by the right angle straightening plate 33 so that the adhesive surface of the corrugated cardboard case 2 is accurately bonded.
When the case or the 20 case is reached, the lower fork 20 moves in the retreating direction indicated by B by the rotation of the gear 22.
At the same time, the upper fork 19 moves in the traveling direction A from the folder section 1 and returns to a state in which it protrudes in the direction of the first accumulation section 3.

When the lower fork 20 retreats in the direction B, the stack 2a is received without any impact on the receiving table 23 which has been waiting for ascending with the driving of the cylinder 24. The receiving table 23 is lowered as shown by the arrow D by the contracting operation of the cylinder 24, and is flush with the discharge conveyor 25 with the lifting device. The discharge conveyor 25 with the lifting device includes a roll 34 having a built-in motor for self-running, and transports the stack 2a toward the next binding machine. At this time, the plate 26 of the upper pressure conveyor 26
a slightly applies pressure to the upper surface of the stack 2a, and the final bonding of the glued portion is completed. By repeating the above operation, the fixed amount sending operation of the cardboard case 2 proceeds.

In the above description of the operation, when the cardboard case 2 enters the first stacking section 3 from the folder section 1,
If the entire length of the cardboard case 2 is short without the upper fork 19, the cardboard case 2 may fall down with the front down, but in this embodiment, the upper fork 19 is The upper fork 19 is arranged so as to protrude in the direction of the first accumulation portion 3 from the upper fork 19.
Thereby, about five cases of the cardboard case 2 can be received without difficulty, and can be transferred onto the lower fork 20 and stacked as the stack 2a.

If the cardboard case 2 that has entered the first stacking section 3 from the folder section 1 has a feeding error or a bending error, it may cause trouble in the subsequent steps. The restoration work is performed by retracting both the lower fork 19 and the lower fork 20. During this recovery operation, the meshing state between the fork on the other side and the gear 22 is released while the fork on one side of the upper fork 19 or the lower fork 20 is retracted, and the fork is moved in the retreating direction.

FIG. 2 shows a control example of the AC servomotor 21.
4 through FIG. As described above, it is necessary that 70 to 80% of the width L in the traveling direction of the cardboard case 2 protrudes from the folder portion 1 toward the first accumulation portion 3 as described above. In particular, since the width L of the cardboard case 2 varies depending on the application, the length of the upper fork 19 protruding in the traveling direction must be appropriately changed.

Therefore, as shown in FIG. 2, the gear 22 receiving the rotational force of the AC servomotor 21 is
And the lower fork 20 at the same time, and the AC servomotor 21 itself is provided with frames 27,
28, it is slidable in the left-right direction. Reference numeral 29 denotes a geared motor. A gear 31 that meshes with an output gear 30 of the geared motor 29 is screwed to a screw screw shaft 32, and the other end of the screw screw shaft 32
It is rotatably supported by the C servo motor 21.

Therefore, when the position of the AC servomotor 21 is changed to the left or right in accordance with the change of the width L of the cardboard case 2 in the traveling direction, the geared motor 29 is driven to rotate, and this torque is output by the output gear. The AC servomotor 21 transmitted from the gear 30 to the screw screw shaft 32 via the gear 31 and the other end of the screw screw shaft 32 is rotatably supported is moved from the position of U1 shown in FIG. 2 to U2 shown in FIG.
, And further to the position U3 shown in FIG. The geared motor 29 starts rotating in response to a command from a computer (not shown), and changes the AC servomotor 21 to an optimal position in accordance with the width L of the cardboard case 2 in the traveling direction. The length of the upper fork 19 protruding in the traveling direction A can be appropriately changed according to the width L of the upper fork 19.

[0028]

As described above in detail, according to the apparatus for quantitatively delivering corrugated cardboard products according to the present invention, the corrugated cardboard case is formed by projecting the upper fork in the traveling direction when the corrugated cardboard case enters the collecting section. The upper fork is moved in the retreating direction and the lower fork is simultaneously moved in the advancing direction by the drive of the servomotor to transfer the stack to the lower fork. When the stack reaches a predetermined number, the lower fork is moved. It is possible to transport the stack to the next step by the discharge conveyor with the lifting device after the stack is set back on the receiving table arranged below and the traveling speed of the cardboard case with mass production. Even if the speed becomes high, the process can be performed without being affected by processes such as drying of the glue or the printing ink,
Overall production speed can be increased.

In particular, when moving to the next step from the lowermost part of the corrugated cardboard case in the accumulating portion, even if there is a corrugated cardboard case that is not sufficiently bonded, the peeling phenomenon of the bonded portion or the "adhesive bonded portion" Since the "displacement" phenomenon does not occur, there is no "jam-up" trouble caused by the subsequent cardboard case hitting the rear end of the corrugated cardboard case, and the subsequent process progresses The effect of eliminating obstructive factors and having a favorable effect on the accuracy and strength of the obtained product can be obtained.

Further, it is possible to transmit the rotational force of the geared motor to the screw shaft in accordance with the width of the cardboard case in the traveling direction, and to move the servomotor to an optimum position. By changing the protrusion length, different types of cardboard cases can be quickly handled.

Further, in this embodiment, since the main part of the apparatus itself is not three-dimensionally arranged in the vertical direction as in the conventional example, the overall length is prevented from being lengthened, and the plant and the like are prevented from becoming long. The present invention has the effect of reducing the installation occupied area in, and is applied to a fixed-rate feeding device for a corrugated cardboard case for a box-making machine, as well as to accelerate the process.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a fixed quantity feeding device for a cardboard case according to the present invention.

FIG. 2 is a main part side view showing a control example of the servomotor in the embodiment.

FIG. 3 is a main part side view showing an example of a control mode of the servo motor.

FIG. 4 is a side view of a main part showing another example of a control mode of the servo motor.

FIG. 5 is a side view showing an example of a conventional fixed-rate feeding device for a cardboard case.

FIG. 6 is an enlarged side view of a main part showing a state of accumulation of a cardboard case in a conventional accumulation part.

FIG. 7 is a plan view showing a “shift” phenomenon occurring in the cardboard case.

FIG. 8 is a plan view showing another “deviation” phenomenon occurring in the cardboard case.

FIG. 9 is an enlarged side view of a main part showing an obstacle in a process due to occurrence of the “displacement”.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Folder part 2 ... Corrugated cardboard case 2a ... Aggregate 3 ... 1st accumulation part 16, 17 ... Folding belt 18 ... Sensor 19 ... Upper fork 20 ... Lower fork 21 ... AC servomotor 22 ... Gear 23 ... Receiving table 24 ... Cylinder 25 discharge conveyor with lifting device 26 pressure conveyor 27, 28 frame 29 geared motor 30 output gear 32 screw screw shaft 33 right angle straightening plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location B65H 31/32 B65H 31/32 (56) References JP-A-62-41160 (JP, A) JP-A-5-132218 (JP, A) JP-A-5-208774 (JP, A) JP-A-55-89158 (JP, A) JP-A-5-253897 (JP, A) JP-A-4-144835 (JP JP, A) JP-A-61-27869 (JP, A) JP-A-3-115056 (JP, A) JP-A-57-158640 (JP, U)

Claims (2)

(57) [Claims] 1. A corrugated cardboard case that has been formed into a predetermined shape and has been subjected to a gluing step and a folding step for a body has been collected into a predetermined number of sheets set in a stacking unit and supplied to a next binding step. An upper fork and a lower fork which are provided so as to be able to enter and retreat into an accumulation portion located in the traveling direction of the corrugated cardboard case, and the upper and lower forks enter and exit the accumulation portion. A servomotor for controlling the retreating operation, a receiving table which is disposed below the lower fork and is provided so as to be movable up and down, and to which a predetermined amount of a corrugated cardboard case stack laminated on the lower fork is transferred, and It becomes the received integrated body comprising a lifting device with discharge conveyor for conveying to the next step, depending on the servo motor
Gears that are rotationally driven between the upper and lower forks.
By arranging it so that it meshes with both,
The fork moves in the direction of travel and the other fork
A fixed quantity feeding device for a corrugated cardboard case characterized by moving in a retreating direction . (2)Formed into a predetermined shape and glued to the trunk
Collect the cardboard case after the process and folding process
In the stacking section, the sheets are collected in a predetermined number of
In the fixed-quantity feeding device that is designed to supply Into the stacking section located in the direction of travel of the cardboard case.
Upper fork and lower part that can be freely entered and retracted
Fork and stacking part of upper and lower forks
Servo motor that controls the approach and retreat operations inside
It is located under the fork and can be moved up and down.
A set of corrugated cardboard cases stacked on a fork
And the receiving table to which the
Discharge with lifting device that transports the collected assembly to the next process
And an outgoing conveyor, Rotate to above servo motor
Gears screwed to the freely supported screw screw shaft
Transfers the torque of the geared motor to advance the cardboard case.
Change the position of the servo motor with the change of the line width
Length of the upper fork and lower fork
Changed appropriatelyCharacterized byCorrugated cardboard
A constant-rate feeding device for the source.