JP2736719B2 - Blank folding machine in box making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box folding machine for manufacturing a folding box made of paper, and a blank folding apparatus for folding a flat blank while transporting the blank. The present invention relates to a blank folding device that lifts the outer portions of these folds 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 apparatus of this type has two
A set of folding units, the spacing of which is adjustable in accordance with the spacing of the two creasing lines of the blank to be bent, each folding unit resting on the inside of the folding line of the blank A lower belt conveyor to be conveyed, an upper belt conveyor provided at an upper portion of an upstream portion of the lower belt conveyor, and pressing the blank against the lower belt conveyor, and a running while twisting upward from a side of the lower belt conveyor to fold the blank. It consists of a bent belt that bends the muscle outer part upward and inward.

[0003] The folding apparatus can be used for blanks of different sizes by changing the spacing of the folding units. When a blank having a large width is machined by this apparatus, if the interval between both folding units is increased, the central portion of the blank hangs down due to its weight, and normal folding becomes difficult.

[0004] As a countermeasure, an apparatus having three sets of bending units has been proposed and used. In this device,
For blanks with a small width, use only two adjacent folding units, and do not use the remaining folding units. For blanks with a large width, use folding units at both ends and The folding unit removes the folding belt and uses it to support the blank as only the lower belt conveyor and the upper belt conveyor.

In this device, the work of attaching and detaching the bending belt is required in accordance with the change in the dimensions, and the work efficiency is reduced.

[0006]

Therefore, according to the present invention, even a blank having a large width can be normally bent.
It is another object of the present invention to obtain a blank bending apparatus that can easily change dimensions in a short time.

[0007]

SUMMARY OF THE INVENTION The present invention provides two sets of right and left,
It has a bending unit whose interval can be adjusted according to the interval between two fold lines of the blank to be bent, and each of the bending units carries the folding line inside of the blank and transports it. A belt conveyor, an upper belt conveyor provided at an upper portion of an upstream portion of the lower belt conveyor, for pressing a blank against the lower belt conveyor, and running while twisting upward from a side of the lower belt conveyor, and an outer portion of a folding line of the blank. In a blank folding apparatus comprising a bending belt for bending an inward and upward, provided between both folding units, it can be moved up and down, can rise and put a blank, can descend and can approach both lower belt conveyors. It is provided between the lower auxiliary belt conveyor and both folding units so that it can be moved up and down and the position can be adjusted in the flow direction. 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]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention.

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

The folding units 11 and 11 'are composed of lower belt conveyors 12 and 12' and upper belt conveyors 13 and 13 '.
And folding belts 14, 14 '.

The lower belt conveyors 12, 12 'are provided at the upper inside portions of the lower frames 15, 15', are driven by power, run horizontally, and place a blank 16 on it horizontally. Carry from right to left. The lower frames 15, 15 'can be moved in the left and right direction of the flow of the blank along the rail bodies 17, 17 to adjust the distance between each other.
8 'is set to be located at the outer end of the lower belt conveyors 12, 12'. In addition, the folding lines 18, 18 '
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 'are provided.
It is located at the upper part of the upstream part of 12 ', runs following, and presses the blank 16 against the lower belt conveyor. The reason that the upper belt conveyor is provided only in the upstream portion is that after the middle stream portion, both side portions of the blank are folded up to the upper portion. The upper frames 19, 19 'are
It can be moved right and left along 0 and is set to be located exactly on the lower belt conveyors 12, 12 '.

[0013] The folding belts 14, 14 'are provided on the lower frames 15, 15', and the lower belt conveyors 12, 1 '.
From the outside of 2 ′, it rises gradually vertically, and furthermore, it is driven by power while being twisted so as to overlap on the lower belt conveyor and travels, and the outer portions of the creasing lines 18 and 18 ′ of the blank 16 are bent upward and inward.

A lower auxiliary belt conveyor 21 is attached to a lower auxiliary frame 22 at a lower portion between the bending units 11 and 11 ', and is driven by power. The lower auxiliary frame 22 is capable of adjusting the position in the left and right direction along the rail bodies 23, 23, and the upper part 24 is connected to the base 25.
Are attached by links 26, 26.
For this reason, the links 26, 26 can be moved up and down by loosening the attachment screws once and rotating them, and when the tops 24 are raised (shown by solid lines in FIG. 1), the lower auxiliary belt Conveyor 21 can load 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 ′, thereby enabling the two lower belt conveyors 12 and 12 ′ to approach each other.

An upper auxiliary belt conveyor 27 is mounted on the upper auxiliary frame 28 so as to be driven and driven at an upper portion between the bending units 11 and 11 '. The upper auxiliary frame 28 includes an arm part 29, a coupling part 30, and a lower part 31. The arm part 29 includes the rail body 20,
20 and can be moved left and right along these, and extend long in the blank flow direction. Coupling part 30
Is attached to the arm portion 29, and its attachment position can be adjusted along the arm portion by loosening its 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 coupling portion 30, and further attaches a screw shaft 34 extending from the handle 33 at the upper end of the guide rod to the coupling portion 30. It can be moved up and down by screwing together 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. .

Since the blank folding apparatus 10 has the above configuration, it is used as follows.

In the case of using a blank having a large width, the blank is shown as a solid line. That is, the interval between the two folding units 11, 11 'is increased so that the folding lines 18, 18' to be folded are located at the outer ends of the lower belt conveyors 12, 12 '. The lower auxiliary frame 22 is located substantially at the center of both folding units, the upper part 24 is raised, and the lower auxiliary belt conveyor 21 places the blank 16 thereon. Similarly, the upper auxiliary frame 28 is located substantially at the center of both folding units, and the lower portion 31 is lowered so that the blank 16 is pressed 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 far downstream as possible without interfering with bending.

When the bending process is performed as described above, the center portion of the blank 16 does not sag, and normal bending can be realized. Further, since the upper auxiliary belt conveyor 27 extends in the downstream direction and presses the blank to the portion where the upper belt conveyors 13 and 13 'do not exist, the conveyance is stable and reliable.

In the case of using a blank having a small width dimension, the blank is shown as 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 two folding units 11 and 11 'is reduced, and the folding is performed using only the two folding units. Perform processing.

[0020]

As described above, the blank folding apparatus of the present invention has a lower auxiliary belt conveyor and an upper auxiliary belt conveyor. A bending process can be performed. In addition, the lower auxiliary belt conveyor can be raised and lowered, and the upper auxiliary belt conveyor can be moved up and down and adjusted in the flow direction. When using a blank with a small radial dimension, retract these auxiliary belt conveyors. The bending process can be performed using only the bending unit. Since the use of the lower auxiliary belt conveyor and the upper auxiliary belt conveyor can be easily switched between use and retraction, it is possible to quickly respond to a change in the dimensions of the blank and to increase the work efficiency. .

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

[Brief description of the drawings]

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

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

[Explanation of symbols]

10 blank blanking device, 11, 11 'bending unit, 12, 12' lower belt conveyor, 13, 13 '
... Upper belt conveyor, 14, 14 '... Bending belt, 1
6 blank, 18, 18 '... crease, 21 ... lower auxiliary belt conveyor, 22 lower auxiliary frame, 27 ... upper auxiliary belt conveyor, 28 ... upper auxiliary frame.

Claims (1)

(57) [Claims] 1. Two sets of left and right blanks to be bent 2
It has a bending unit whose interval can be adjusted in accordance with the interval of the fold line of the streak, and each of the bending units has a lower belt conveyor that carries and transports the inner side of the fold line of the blank; Installed above the upstream part of the belt conveyor,
An upper belt conveyor that presses a blank against a lower belt conveyor, and a blank folding device including a bending belt that travels while twisting upward from the side of the lower belt conveyor and bending an outer side of a folding line of the blank upward and inward. In, between the lower folding belt conveyor, which is provided between the two folding units, is capable of ascending and descending, rises and places a blank, and descends to allow both lower belt conveyors to approach each other, An upper auxiliary belt that is provided, can be moved up and down and can be adjusted in the flow direction, descends and presses the blank against the lower auxiliary belt conveyor, ensures the conveyance of the blank, and ascends so that both upper belt conveyors can approach each other A blank folding apparatus for a box making machine, comprising a conveyor.