JPH05124135A - Apparatus for processing corrugated cardboard sheet - Google Patents

Abstract

PURPOSE:To perform the slot processing of a long corrugated cardboard sheet without scaling up an apparatus as a whole and to prevent the synchronizing inferiority and tunning inferiority with a printing part by converting the uniform velocity rotation of a main motor to non-uniform velocity rotation before transmitting the same to the cylinder of a slot means. CONSTITUTION:The main motor 11 of a box making machine rotates a drive gear 13 through the output shaft 12 thereof 'and the intermediate gear 14 meshed with the drive gear 13 is supported on a rotary shaft 15. A non-circular gear 16 is supported on the other part of the rotary shaft 15 and the non-circular gear 17 meshed with the non-circular gear 16 is connected to a cylinder 18 to convert the uniform velocity rotation of the main motor 11 to non-uniform velocity rotation to transmit the same to the cylinder. The non-circular gears 16, 17 are NC-gears due to a CAP/CAMP system and have a circular shape whose outer shape is eccentric but an oval gear, a sine function gear, a corrected sine function gear or a logarithmic spiral gear may be used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated board sheet processing apparatus suitable for slotting a corrugated cardboard case for packing a long construction material such as aluminum sash.

[0002]

2. Description of the Related Art A box making machine in a corrugated board manufacturing machine includes, for example, as shown in FIG. 5, a sheet supply section 2 for supplying a corrugated board sheet 1 and a printing section 3 for printing on the corrugated board sheet 1.
, A creaser slot part 4 for making a ruled line on the corrugated cardboard sheet 1 with a creaser die, and a slot part 5 for making a notch
And a sending section 6. Conveying rollers 7 and 8 are appropriately arranged above and below the conveying line L of the corrugated board sheet 1.

Then, the corrugated cardboard sheets 1 on which the kickers 2a of the sheet supply unit 2 are stacked are fed to the printing unit 3 from the lowest one. In the printing unit 3, the corrugated cardboard sheet 1 that has been fed is printed in a predetermined color and then fed to the creaser slot unit 4. In the creaser slot section 4,
Ruled lines are applied to the bent portions by the rotation of the pair of upper and lower creaser slots 4a and 4b, and then the slot portion 5 is formed.
Is fed to.

In the slot portion 5, a pair of upper and lower rotary blades 9,
A cut is made in the front and rear of the corrugated board sheet 1 by one rotation of 10, and the paper is fed to the delivery unit 6. In the sending-out unit 6, the pair of upper and lower conveyors 6a and 6b sends out to a stacker or the like. Also, the slot portion 5 may be a double cylinder type in which the rotary blades 9 and 10 are separately provided.

[0005]

Although there is no problem in manufacturing a normal cardboard case in the slot portion having the above-mentioned structure, for example, in household appliances such as refrigerators and projectors and aluminum sash. When a corrugated cardboard case for packaging such building materials is manufactured and processed, it cannot be manufactured as it is because there is a limit to the diameter of the slot processing with one rotation of the cylinder of the slot portion. Further, increasing the diameter of the cylinder or increasing the distance within the double cylinder increases the size of the entire apparatus and increases the cost. Further, there is also a method of controlling the rotation of the cylinder by an isolated servo motor, but there are problems that the cost is increased and that synchronous synchronization with the printing unit and the like cannot be obtained at the same time.

The present invention has been made in view of the above problems, and it is possible to perform slot processing of a long corrugated cardboard sheet without increasing the size of the entire apparatus, and to prevent synchronization failure and synchronization failure with a printing section or the like. The purpose of the present invention is to provide a corrugated cardboard sheet processing device without worry.

[0007]

In order to achieve the above object, in the present invention, a sheet feeding section for supplying a corrugated board sheet, a printing section for printing the corrugated board sheet, a creaser section for forming a ruled line on the corrugated board sheet, In a box-making machine equipped with a slot for making cuts, etc., where each part is driven by the main motor and transmission means, the non-constant rotation of the main motor is controlled by the non-constant rotation of the non-circular gears. The cardboard sheet processing apparatus is characterized in that the cardboard sheet processing apparatus is characterized in that it is transmitted to the cylinder of the slot section.

[0008]

The rotation of the main motor is transmitted to the cylinder of the slot as unequal speed rotation by the unequal speed rotation means formed by a combination of non-circular gears provided in the drive system. Then, for example, when the front part of the long corrugated cardboard sheet passes below the cylinder, the cylinder rotates at the same speed as or slightly higher than the conveying speed of the long corrugated cardboard sheet, and the rotary blade attached to the cylinder performs predetermined slot processing. To do.

When the intermediate portion of the long corrugated cardboard sheet passes under the cylinder, the cylinder rotates at a low speed by the non-uniform speed rotating means. Then, when the rear part of the long corrugated cardboard sheet passes below the cylinder, the cylinder rotates at the same speed as or slightly higher than the conveying speed of the long corrugated cardboard sheet, and the rotary blade mounted on the cylinder performs predetermined slot machining. Such slot processing is continuously performed on the conveyed long corrugated cardboard sheet.

[0010]

EXAMPLE An example of the embodiment of the corrugated board sheet processing apparatus according to the present invention will be described below for processing a long corrugated board sheet.
A detailed description will be given with reference to the drawings. FIG. 1 is a schematic plan view showing a first embodiment of the corrugated board sheet processing apparatus according to the present invention. FIG. 2 is a schematic cross-sectional view showing a meshing state of the non-circular gears by cutting along the line AA in FIG. Also,
FIG. 3 is a diagram showing the relationship between the conveying speed of a long corrugated cardboard sheet and the rotational speed of a cylinder that rotates unequally, and FIG. 4 is a plan view of a long corrugated cardboard sheet that has been slotted. Further, FIG. 5 is a schematic explanatory view of a box making machine in the corrugated board manufacturing machine.

In FIG. 5, the box making machine has a supply unit 2 for sequentially supplying the stacked long corrugated cardboard sheets 1 to a printing unit 3 and a product name, a manufacturing company name, the number of stored products, etc. in the long corrugated cardboard sheet 1. A printing section 3 for printing, a creaser slot section 4 for applying a ruled line to a bent portion by rotating a pair of upper and lower creaser slots 4a, 4b, and a pair of upper and lower rotary blades 9,
The slot portion 5 which is cut by the rotation of 10 and the conveying portion 6 which sends out the predetermined printing, ruled lines and notches to the next process side by a pair of upper and lower conveying conveyors 6a and 6b.
It consists of Conveying rollers 7 and 8 are appropriately arranged above and below the conveying line L of the corrugated board sheet 1.

In FIG. 1, 11 is a main motor in a box making machine, which rotates a drive gear 13 by an output shaft 12. An intermediate gear 14 that meshes with the drive gear 13 is pivotally supported by a rotary shaft 15. The non-circular gear 1 is provided on the other side of the rotary shaft 15.
6 is pivotally supported. Non-circular gear 1 that meshes with non-circular gear 16
A cylinder 7 is connected to the cylinder 18 and converts the uniform speed rotation of the main motor 11 into a non-uniform speed rotation and transmits the ununiform speed rotation. Reference numeral 19 is a differential device. The non-circular gear 16 and the non-circular gear 17 are CA
The NC-gear according to the D / CAM system is a perfect circle with an eccentric outer shape as shown in the figure, but may be an elliptical gear, a sine function gear, a modified sine function gear, a logarithmic spiral gear, or the like.
Further, the non-circular gears 16 and 17 constitute non-constant speed rotation means. The rotation of the cylinder 18 is transmitted via the rotation shaft 20. The differential device 19 is provided in the cylinder 18 during normal operation.
It is for moving.

FIG. 3 is a diagram showing the relationship between the conveyance speed of the long corrugated cardboard sheet 1 conveyed at a constant speed and the cylinder 18 rotating at a non-constant speed, wherein the vertical axis represents speed and the horizontal axis represents time. 1
The dashed line indicates the transport speed of a long corrugated cardboard sheet transported at a constant speed (high speed). Further, the chain double-dashed line indicates the rotation speed of the cylinder 18 which is rotated at a non-uniform speed by the non-uniform-speed rotation means. The cylinder 18 includes a rotary blade 9,
Only during the slot processing operation of the long corrugated cardboard sheet 1 by 10, the rotation speed is the same as or slightly higher than the conveying speed of the long corrugated cardboard sheet 1.

As described above, the cylinder 18 is slowly rotated when the intermediate portion m of the long corrugated cardboard sheet 1 is passed, and the cylinder 18 is rotated at a high speed when the front and rear end slots 1a and 1b are partially passed. The long corrugated cardboard sheet 1 as shown in FIG.

6 to 9 are process explanatory views showing a second embodiment of the long corrugated board sheet processing apparatus according to the present invention. The second example of this embodiment is of a double cylinder type in which cylinders 18a and 18b are arranged in parallel. Then, the rotary blade 9 for front slot machining is mounted on the cylinder 18a, and the rotary blade 10 for rear slot machining is mounted on the cylinder 18b.
Put on.

6 (a) and 6 (b) show a state in which the long corrugated cardboard sheet 1 is about to enter below the cylinder 18a of the slot portion 5, and both cylinders 18a and 18b are rotating at a low speed. FIGS. 7A and 7B show a state in which the front portion of the long corrugated cardboard sheet 1 passes below the cylinder 18a and the predetermined slot processing 1a is applied to the front portion of the long corrugated cardboard sheet 1. .. At this time, the cylinder 18a rotates at the same speed as or slightly higher than the conveying speed of the long corrugated cardboard sheet 1 by the combination of non-circular gears (not shown).
The cylinder 18b is rotating at a low speed.

FIGS. 8A and 8B show a state in which the intermediate portion 1 of the long corrugated cardboard sheet 1 passes below the cylinders 18a and 18b, and both cylinders 18a and 18b are rotating at a low speed. 9A and 9B show a state in which the rear portion of the long corrugated cardboard sheet 1 has passed below the cylinder 18b, and the predetermined slot processing 1b has been applied to the rear portion of the long corrugated cardboard sheet 1. At this time, the cylinder 18b rotates at the same speed as or slightly higher than the conveying speed of the long corrugated cardboard sheet 1 by the combination of non-circular gears (not shown). The cylinder 18a is rotating at a low speed. Then, a long corrugated cardboard sheet is provided with slot processing 1a, 1b as shown in FIG.

As described above, in the corrugated board sheet processing apparatus according to the present invention, the non-constant speed rotation of the main motor is transmitted to the cylinder of the slot section as the non-constant speed rotation by the non-constant speed rotation means by the combination of the non-circular gears. Only during slot processing, the conveying speed of the long corrugated cardboard sheet is set to be the same as or slightly higher than that of the long corrugated cardboard sheet, and the cylinder is rotated at a low speed when passing through the long intermediate portion. Therefore, it is possible to manufacture and process a corrugated cardboard case for packaging large products such as home electric appliances such as refrigerators and projectors and building materials such as aluminum sashes without increasing the size of the entire apparatus. In addition, stable slot processing can be performed without fear of misalignment with the printing section or the like.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an example of implementation of a corrugated board sheet processing apparatus according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing a meshed state of a non-circular gear cut along a line AA in FIG.

FIG. 3 is a relationship diagram of a conveyance speed of a long corrugated cardboard sheet and a rotation speed of a cylinder that rotates at a non-uniform speed.

FIG. 4 is a plan view of a slotted corrugated cardboard sheet.

FIG. 5 is a schematic explanatory view of a box making machine in the corrugated board manufacturing machine.

FIG. 6A is a process explanatory view showing a state in which a long corrugated cardboard sheet has entered. FIG. 6B is a plan view of the long corrugated cardboard sheet shown in FIG.

FIG. 7A is a process explanatory view showing a state in which the leading end side slot processing of a long corrugated cardboard sheet is performed. (B) is shown in Figure 7.
It is a top view of the long corrugated cardboard sheet of (a).

FIG. 8A is a process explanatory view showing an intermediate state of processing of a long corrugated cardboard sheet. FIG. 8B is a plan view of the long corrugated cardboard sheet shown in FIG.

FIG. 9A is a process explanatory view showing a state where slot processing is performed on the rear end side of the long corrugated cardboard sheet. (B)
FIG. 9 is a plan view of the long corrugated cardboard sheet of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Long cardboard sheet 5 Slot part 9, 10 Rotating blade 11 Main motor 13 Drive gear 14 Intermediate gear 16, 17 Non-circular gear 18, 18a, 18b Cylinder

Claims (1)

[Claims] 1. A sheet supply section for supplying a corrugated board sheet, a printing section for printing on the corrugated board sheet, a creaser section for making a ruled line on the corrugated board sheet, a slot section for making a notch, etc., and each section is driven by a main motor and transmission means. In a box-making machine that performs the above, a corrugated cardboard sheet characterized by converting the constant-velocity rotation of the main motor into the non-constant-speed rotation and transmitting it to the cylinder of the slot portion through the non-uniform-speed rotation means formed by combining non-circular gears. Processing equipment