JPH06898A - Blank bending device in box making machine - Google Patents

Abstract

(57) [Summary] [Purpose] To realize a blank bending apparatus capable of normally bending even a blank having a large width dimension and easily changing the dimension in a short time. [Structure] Between two sets of folding units 11, a lower auxiliary belt conveyor 21 for mounting a blank central portion and an upper auxiliary belt conveyor 27 for pressing a blank central portion are provided.
The lower auxiliary belt conveyor 21 can be raised and lowered, and can be lowered and retracted when not in use. The upper auxiliary belt conveyor 27 can be moved up and down and the flow method position can be adjusted. When not in use, the upper auxiliary belt conveyor 27 can be moved up and moved in the downstream direction to be retracted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-making machine for producing a folding box made of paper, and a blank-folding device for folding a flat-shaped blank while transporting the blank. At the same time, the present invention relates to a blank folding device that raises the outer portions of these folds upward and folds them inward along two folds extending in the flow direction of the belt conveyor.

[0002]

2. Description of the Related Art A blank bending device of this type is provided on the left and right sides.
A pair of folding units having adjustable spacings according to the spacing of the two folding lines of the blank to be folded, each folding unit placing the inner side of the folding line of the blank on it. A lower belt conveyor to be conveyed, and an upper belt conveyor which is provided on the upper part of the upstream portion of the lower belt conveyor and presses the blank onto the lower belt conveyor, and the lower belt conveyor travels while twisting upward from the side to fold the blank. It consists of a folding belt that bends the outer side of the muscle inward.

The folding device can be used with blanks of different sizes by varying the spacing of the folding units. When processing a blank having a large width with this device, if the space between both folding units is expanded, the central portion of the blank hangs down due to its weight, making normal bending difficult.

As a countermeasure against this, a device provided with three bending units has been proposed and used. With this device,
For small width blanks, use only the two adjacent folding units and avoid the rest of the folding units, for large width blanks use both end folding units The folding unit is designed to remove the folding belt and use it as a lower belt conveyor and an upper belt conveyor only to support the blank.

In this device, the work of attaching and detaching the folding belt is required as the size is changed, and the work efficiency is reduced.

[0006]

Therefore, according to the present invention, even a blank having a large width dimension can be normally bent,
Moreover, it is an object of the present invention to obtain a blank bending apparatus that can be easily changed in a short time.

[0007]

According to the present invention, two sets of right and left are provided.
It has a folding unit whose spacing can be adjusted according to the spacing of the two folding lines of the blank to be folded, and each of the folding units carries the inner side of the folding line of the blank and conveys it. Belt conveyor, provided on the upper portion of the upstream portion of the lower belt conveyor, the upper belt conveyor to press the blank to the lower belt conveyor, and running while twisting upward from the side of the lower belt conveyor, the fold outside portion of the blank In a blank folding device consisting of a folding belt that bends inwardly upward, it is provided between both folding units and can be raised and lowered, and can be raised to put a blank and lowered to bring both lower belt conveyors close to each other. It is installed between the lower auxiliary belt conveyor and both folding units, and can be moved up and down and its position can be adjusted in the flow direction, and it is lowered to lower the blank to the lower auxiliary bell. Pressed against the conveyor, and ensures the transport of the blank, a blank folding apparatus in manufacturing box machine, characterized in that an auxiliary belt conveyor on which to be close to rise to both upper belt conveyor.

[0008]

EXAMPLES Hereinafter, examples illustrating the present invention will be specifically described.

In this blank folding device 10, 2
A pair of folding units 11 and 11 'are provided in parallel to the left and right. The folding units 11 and 11 'are symmetrical and basically have the same configuration.

The folding units 11, 11 'include a lower belt conveyor 12, 12' and an upper belt conveyor 13, 13 '.
And folding belts 14 and 14 '.

The lower belt conveyors 12 and 12 'are provided at the inner upper ends of the lower frames 15 and 15' and are driven by power to run horizontally, and the blank 16 is placed horizontally on the lower belt conveyors 12 and 12 '. Transport from right to left. The lower frames 15, 15 ′ can be moved in the left-right direction of the flow of the blank along the rail bodies 17, 17 to adjust the distance between them, and the fold lines 18, 1 to be bent of the blank 16 can be adjusted.
8'is set so that it is located just outside the lower belt conveyors 12, 12 '. In addition, the fold lines 18 and 18 'are
It has already been formed by the previous process.

The upper belt conveyors 13, 13 'are provided on the upper frames 19, 19', and the lower belt conveyors 12, 13 '
It is located at the upper part of the upstream portion of 12 ', driven, and presses the blank 16 against the lower belt conveyor. The reason why the upper belt conveyor is provided only in the upstream portion is that both side portions of the blank are folded up to the upper portion after the middle stream portion. The upper frames 19 and 19 'are rail bodies 20 and 2
It can be moved to the left or right along 0 and is set to be located just above the lower belt conveyors 12, 12 '.

The folding belts 14, 14 'are provided on the lower frames 15, 15', and the lower belt conveyors 12, 1 '
It gradually rises vertically from the outside of 2 ', and is further driven by being driven while being twisted so as to overlap with the lower belt conveyor, and the outer portions of the fold lines 18, 18' of the blank 16 are bent inward.

A lower auxiliary belt conveyer 21 is attached to a lower auxiliary frame 22 and is driven by power at a lower portion between the folding units 11 and 11 '. The lower auxiliary frame 22 can be adjusted in position in the left-right direction along the rail bodies 23, 23, and the upper portion 24 has a base portion 25.
Are attached by means of links 26, 26.
Therefore, the upper part 24 can be lifted and lowered by loosening the attachment screws of the links 26, 26 once and rotating them, and when the upper part 24 is raised (shown by the solid line in FIG. 1), the lower auxiliary belt The conveyor 21 can carry the blank 16 and when lowered (shown in phantom in FIG. 1),
The lower belt conveyors 12 and 12 ′ are located below the lower belt conveyors 12 and 12 ′, and the lower belt conveyors 12 and 12 ′ can be brought close to each other.

An upper auxiliary belt conveyor 27 is attached to an upper auxiliary frame 28 so as to be driven by the upper auxiliary frame 28 at an upper portion between the folding units 11 and 11 '. The upper auxiliary frame 28 includes an arm portion 29, a coupling portion 30 and a lower portion 31. The arm portion 29 includes the rail body 20,
It is attached to 20, is movable left and right along them, and extends long in the flow direction of the blank. Coupling part 30
Is attached to the arm portion 29, and its mounting position can be adjusted along the arm portion by loosening the set screw once. The lower portion 31 supports the upper auxiliary belt conveyor 27, slidably couples the guide rods 32, 32 extending upward to the joint portion 30, and further attaches the screw shaft 34 extending from the handle 33 at the upper end of the guide rod to the joint portion 30. It is possible to raise and lower by screwing and rotating the handle 33 and the screw shaft 34. For this reason, when the upper auxiliary belt conveyor 27 is lowered, the blank 16 is pressed against the lower auxiliary belt conveyor 21, and when the blank 16 is raised and moved to the downstream position, both upper belt conveyors 13 and 13 'can be brought close to each other. .

The blank bending apparatus 10 having the above-mentioned structure is used as follows.

When a blank having a large width is used, it is shown by a solid line. That is, the space between the folding units 11 and 11 'is widened so that the folding lines 18 and 18' to be folded are located at the outer ends of the lower belt conveyors 12 and 12 '. The lower auxiliary frame 22 is positioned substantially in the center of both folding units, and the upper portion 24 is raised so that the lower auxiliary belt conveyor 21 can carry the blank 16. Similarly, the upper auxiliary frame 28 is positioned substantially at the center of both folding units, and the lower portion 31 is lowered to press the blank 16 against the lower auxiliary belt conveyor 21. Further, at this time, the upper auxiliary belt conveyor 2
The downstream end of 7 is set as downstream as possible within the range where it does not interfere with bending.

When the bending process is performed in this manner, the central portion of the blank 16 does not hang down, and normal bending is realized. Further, since the upper auxiliary belt conveyor 27 extends in the downstream direction and presses the blank to a portion where the upper belt conveyors 13 and 13 'do not exist, the conveyance becomes stable and reliable.

When a blank having a small width is used, it is shown by an imaginary line. That is, the lower auxiliary belt conveyor 21 is lowered, the upper auxiliary belt conveyor 27 is raised and moved to the downstream side, the interval between the both folding units 11, 11 'is narrowed, and the folding is performed using only the both folding units. Perform processing.

[0020]

As described above, the blank bending apparatus of the present invention has the lower auxiliary belt conveyor and the upper auxiliary belt conveyor. Therefore, when a blank having a large width dimension is used, it is preferable to use them. Bending can be performed. Also, the lower auxiliary belt conveyor can be raised and lowered, and the upper auxiliary belt conveyor can be moved up and down and the position in the flow direction can be adjusted, so when using a blank with a small radial dimension, these auxiliary belt conveyors must be retracted. The bending process can be performed using only the bending unit. Further, since switching between use and retreat of the lower auxiliary pelt conveyor and the upper auxiliary belt conveyor can be performed easily and easily, it is possible to quickly respond to a blank dimension change and to improve work efficiency. .

Further, since the position of the upper auxiliary belt conveyor can be adjusted in the flow direction, the downstream end of the upper auxiliary belt conveyor can be extended in the downstream direction, and the blank can be pressed to a portion where the upper belt conveyor does not exist, so that the conveyance is stable and reliable. can do. Therefore, in particular, reliable processing can be realized even for a blank having a small contact area with the lower belt conveyor and being liable to be unstable in conveyance and having a small dimension in the flow direction.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same example.

[Explanation of symbols]

10 ... Blank folding device, 11, 11 '... Bending unit, 12, 12' ... Lower belt conveyor, 13, 13 '
... Upper belt conveyor, 14, 14 '... Folding belt, 1
6 ... Blank, 18, 18 '... Bent line, 21 ... Lower auxiliary belt conveyor, 22 Lower auxiliary frame, 27 ... Upper auxiliary belt conveyor, 28 ... Upper auxiliary frame.

Claims (1)

[Claims] 1. A pair of left and right blanks to be bent 2
It has a folding unit whose spacing can be adjusted according to the spacing between the folds of the strips, and each of these folding units has a lower belt conveyor that carries the inner folds of the blank and conveys it. It is installed on the upper part of the upstream part of the belt conveyor,
A blank folding device consisting of an upper belt conveyor that pushes a blank onto a lower belt conveyor, and a bending belt that runs while twisting upward from the side of the lower belt conveyor and bends the outer side of the fold line of the blank upward inward. In the above, between the folding unit and the lower auxiliary belt conveyor, which is provided between both folding units, can be raised and lowered, and can be raised to load a blank and lowered to bring both lower belt conveyors close to each other. An upper auxiliary belt that is installed and can be moved up and down and can be adjusted in the flow direction, and moves downward to press the blank onto the lower auxiliary belt conveyor to ensure the conveyance of the blank and to move up to bring both upper belt conveyors close to each other. A blank folding device in a box making machine, which has a conveyor.