JPH0146413B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device for a corrugated box making machine.

FIG. 1 shows a schematic structure of a conventional corrugated paperboard sheet feeding device 1. As shown in FIG. In FIG. 1, sheets 5 are stacked on a hopper portion formed by a front support 3 and a rear support 4 on a table 2. Further, a slide bar 6, which is slidably embedded in the table 2, is reciprocated by a crank mechanism 7.
The picker 8 is fixed to the slide bar 6, and the lowermost sheets 5 of the hopper section are kicked out one by one in the direction of the arrow by the picker 8 as the crank mechanism 7 is operated.

In front of the front plate 3, there are vertically feeding rolls 9, 10.
is provided, and the sheet 5 sent out from the hopper section
is sandwiched between upper and lower feed rolls 9 and 10, and is further sent to a subsequent process by the rotation of both rolls 9 and 10.

FIG. 2 is an enlarged detailed front view of section A in FIG.
b is processed in the previous step. FIG. 4 shows the state in which the sheet 5 passes between the upper and lower feed rolls 9 and 10.

In such a state, both upper and lower feed rolls 9,
The gap g of 10 is made smaller than the thickness t of the ruled line portions 5a and 5b by a separately provided gap adjustment device (not shown and not described). If you do not do this, the ruled line part 5
When a and 5b reach the positions of both upper and lower feed rolls 9 and 10, the feed force stops or decreases,
This is because the timing of processing such as printing processing or grooving processing, etc., which is processed with timing in the next process, is out of order, which becomes a cause of deterioration of product quality.

In addition, in this way, both the upper and lower feed rolls 9, 1
The sheet 5' that is sent out from 0 becomes more crushed (the shaded area in the figure) and reduces the strength of the corrugated box as a product. Therefore, when a high-strength corrugated box is required, there is a risk of rejecting the product. This led to disadvantages such as the loss of resources.

The present invention has been proposed in order to solve the above-mentioned conventional drawbacks, and at least one of the feed rolls is rotatably supported at both ends and adjacent to each other on a single shaft extending in the width direction. are arranged in a staggered manner, and adjacent ones on the shaft are rotatably supported on bearings arranged eccentrically with a phase shift of 180 degrees from each other, and the rollers are arranged in the same manner as a part of the feed roll. By providing a gear that meshes with the gear that rotationally drives the roll, we can provide a paper feeding device for a corrugated box making machine that does not cause feeding defects or crushing as in the past even when a plate-like object passes through the ruled line. That is.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is a plan view showing an outline of the first embodiment of the present invention. FIG. 6 is an enlarged plan view showing the detailed structure of both the upper and lower feed rolls shown in FIG. 5, and FIG. 7 is a cross-sectional view taken from C to C in FIG. 6.

Now, in Fig. 5, a plurality of upper feed rolls 2
0a, 20b...20n is one shaft 14
On the other hand, as shown in the figure, they are fitted in parallel to the sheet 5 in a staggered manner. In addition, the lower feed roll 20'a,
20'b...20'n is also one shaft 1
4' are arranged at symmetrical positions on a vertical line passing through the center of the upper feed rolls 20 groups. Note that the lower feed rolls 20' group have exactly the same configuration as the upper feed rolls 20 group, including its supporting method and drive device, so only the upper feed rolls 20 group will be described below.

Now, in Figures 6 and 7, shaft 1
4 is rotatably supported at both ends by frames 13, 13', and one shaft end is connected to a crank mechanism (not shown) which also serves to operate a kicker 8, which will be described later.
It is driven in synchronization with the speed of Kitsuka 8. In addition, a plurality of gears 16 are connected to the key 1 on the shaft 14.
It is fixed by 7. Furthermore, each gear 16
On the other hand, a pair of internal gears 18, 18 are fitted into the shaft 14 so as to mesh in a staggered manner as shown.

The outer periphery of the internal gear 18 is provided with a (for example, rubber) lining 19 that increases the coefficient of friction with paper.
It is configured as an upper feed roll 20. That is,
The roll 20 is provided on a support 21 or 22,
Bearings 2 adjacent to each other on the shaft 14 are eccentrically arranged with a phase shift of 180° from each other.
It is rotatably supported by 3. Further, the supports 21 and 22 are the frames 13 and 22, respectively.
13' is supported at both ends by a crossbeam 24 (FIG. 7).

The relationship between the gap g between the upper and lower feed rolls 20, 20' shown in FIG. 7 and the thickness T of the sheet 5 and the thickness t of the ruled line part shown in FIG. 3 is such that T>g>t. It has been adjusted in advance. This adjustment can be performed by freely changing the gap g using a separately provided well-known adjustment mechanism, but its explanation will be omitted here.

Next, the operation of the first embodiment will be described. In FIG. 7, the operation in which the corrugated cardboard sheet 5 is kicked out in the direction of the arrow by the kicker 8 is the same as the conventional one. 6 and 7, when the shaft 14 is rotated by a motor (not shown), the upper feed rolls 20 are rotated via each gear 16, and at the same time, the lower feed rolls 20' which are similarly operated are rotated. The sheet 5 can be propelled in the direction of the arrow by frictional force.

Figures 8 and 9 show the vertical feed roll 2 at this time.
0 and 20' and the state of engagement with the seat 5. In FIG. 8, the leading end of the sheet 5 is first moved between the upper feed roll 20b and the lower feed roll 20'.
b, the sheet 5 is advanced in the direction of the arrow, and the ruled line portion 5a of the sheet 5 is moved further by the upper and lower feed rolls 20b,
20'b is shown when it is located on a straight line connecting both centers 0b and 0'b. In addition, as shown in FIG. 8, two sets of rolls 2 are arranged in a staggered manner.
Distance l between roll centers 0a and 0b of 0a and 20b
is set smaller than the outer diameter of the rolls 20a, 20b.

At this time, the leading end of the sheet 5 is already being propelled in the direction of the arrow by both the upper and lower feed rolls 20a, 20'a. Then, when the sheet 5 reaches the position shown in FIG. 9, it is propelled by both the upper and lower feed rolls 20b, 20b. Thereafter, the sheet 5 passes through the ruled line portion 5b in the same manner, and the sheet 5 is continuously and smoothly propelled.

Next, FIGS. 10 and 11 show the first part of the device of the present invention.
This is a simplified summary of the eighth embodiment. Therefore, FIG. 10A shows what has already been described as the first embodiment of the present invention. The explanation will be given below in order.

B in FIG. 10 corresponds to the second embodiment,
The upper feed roll 20 group, the shaft 14, and other structures are completely the same as in the first embodiment (Fig. 5,
6 and 7). Also, the structure of the bottom feed is
A known conveyor 25 is provided in place of the group of lower feed rolls 20' in the embodiment. This 10th
The operation of the embodiment in FIG.

Next, FIG. 10C corresponds to the third embodiment, and FIGS. 12 and 13 show the specific embodiment. Since the upper feed mechanism and the lower feed mechanism in this third embodiment are completely symmetrical, only the upper feed roll device will be described below.

In FIG. 12 or 13, shaft 2
6 is fixed at both ends to the frames 13, 13', and a plurality of eccentric bosses 2 are provided on the shaft 26.
7 adjacent ones are fixed in a staggered position by keys 28 with a phase shift of 180° from each other. A gear 30 is attached to the outer periphery of each eccentric boss 27 via a bearing 29, and a lining 19 (for example, a rubber lining) is provided on the outer periphery of the boss portion of the gear 30 to improve the frictional force with the seat 5. )
is applied, and the upper feed rolls 31a, 31b...31
forming n.

Next, in FIG. 13, each pair of gears 30a
, 30b, 30c, 30d, . . . , and 30n, gears 32 are provided at positions that mesh with both of them, and each gear 32 is fixed on a shaft 33 by a key 34 in a skewer shape. Shaft 33
is rotatably supported at both ends by frames 13, 13', and can be connected from one shaft end to the crank mechanism for driving the screwdriver (FIG. 1, 7) in the same manner as described above.

Next, to explain the operation of the third embodiment, in FIG. 13, when the shaft 33 is driven in accordance with the paper passing speed by the kicker (FIG. 7, FIG. 8), each gear 32
The rotation is simultaneously transmitted to each pair of gears 30 groups, and rotation in the direction of the arrow is given to the upper feed rolls 31 group. Similarly to the first embodiment, the group of lower feed rolls 31' is operated in the same manner, and the sheet 5 can be propelled in the direction of the arrow.

Next, FIG. 10D corresponds to the fourth embodiment, and the structure of the upper feed roll group 31 and other components is completely the same as that of the third embodiment (FIGS. 12 and 13).
Further, the lower feed mechanism is the lower feed roll 3 of the third embodiment.
As in the second embodiment, a known conveyor 25 is provided in place of the group 1'. In the fourth embodiment, the lower feed roll 3 described in the third embodiment
This embodiment is similar to the third embodiment except that the function of group 1' is performed by conveyor 25.

Next, FIG. 11A shows a fifth embodiment, in which the upper feed roll 20 group is the same as the first or second embodiment described above (FIG. 10A and B), and the lower feed roll 10 is the same as the conventional one. (Fig. 2, 10).

And the upper feed roll 2 in the fifth embodiment
The operation of the 0 group is exactly the same as in the first or second embodiment. Further, the operation of the lower feed roll 10 is similar to that of the conventional roll.

14 and 15 show the state of engagement between the vertical feed roll and the sheet 5 in the fifth embodiment. Now, in FIG. 14, when the ruled line part 5a of the sheet 5 reaches the lower part of the upper feed roll 20b, the leading end of the sheet 5 has already reached the upper feed roll 20a.
It is propelled in the direction of the arrow by the lower feed roll 10. Next, when the sheet 5 reaches the position shown in FIG. 15, the sheet 5 is continuously propelled in the direction of the arrow at a constant speed by the upper feed roll 20b and the lower feed roll 10.

Next, the sixth embodiment is based on the method shown in FIG. 11(b), and its structure is the same as the fifth embodiment upside down. In this sixth embodiment, the upper feed roll 10 is replaced with the conventional lower feed roll 10 (see FIG.
0), and the action of the lower feed roll group 20' is the same as in the first embodiment.

Next, the seventh embodiment is of the type shown in FIG. 10 is arranged as is.

The operation of the upper feed roll 31 group in this seventh embodiment is the same as in the third or fourth embodiment, and the operation of the lower feed roll 10 is the same as in the conventional case. The engagement between the upper and lower feed rolls 31 and the 10 sheets 5 is exactly the same as that shown in FIGS. 14 and 15 as the fifth embodiment.

Next, the eighth embodiment is of the type shown in FIG. 11 D, in which the upper feed roll 10 is similar to the conventional lower feed roll (FIG. 2 10), and the lower feed roll 31' group is The structure is exactly the same as that of the third embodiment.

Now, in the eighth embodiment, the upper feed roll 10 is
The operation is the same as that of the conventional lower feed roll 10, and the function of the lower feed roll 31' group is completely the same as that of the third embodiment. Furthermore, the engagement between the upper and lower rolls and the sheet 5 is the same as that already described with reference to FIGS. 14 and 15 shown as the fifth embodiment.

Since the present invention is configured as described in detail above, the gap between the upper and lower feed rolls can be set to the maximum dimension that allows the sheet to be fed by frictional force with the roll surface, and the sheet can be moved between the upper and lower rolls. The sheet passes through the sheet only by being compressed within the elastic limit at , and the thickness of the sheet after passing completely restores to the thickness T before passing,
There is no need to worry about it collapsing. Further, in the present invention, at least one of the feed roll groups is arranged such that adjacent ones are arranged in a staggered manner on one shaft that is rotatably supported at both ends and extends in the width direction, and the shaft the ones that are adjacent to each other
It is rotatably supported by bearings that are arranged eccentrically with a 180° phase shift, and a gear that meshes with a gear that rotationally drives the roll is provided in a part of the feed roll, so that the rotation of adjacent rolls is The roll center spacing can be set smaller than the roll outer diameter, and the dimension from the tip of the corrugated sheet to the ruled line of the corrugated board is set very small.
Even if one of the rolls in the set is located at the ruled line, there is little risk that the other roll will come off from the ruled line to the leading edge of the sheet. Can be transported reliably. In addition, the present invention allows a plurality of rolls to be
By placing it on the shaft of the book, it is possible to
Compared to two sets of rolls placed on the drive shaft of a book, two
The roll center spacing of the set of rolls can be set to a small spacing that is less than or equal to the radius of the rolls. By setting the intervals to be small in this way, the degree of influence due to the position of the ruled lines can be made extremely small, and since there is only one shaft, the cost can be reduced compared to the conventional case of two shafts. Therefore, according to the present invention, it is possible to eliminate problems such as loss of sheet material and reduction in product strength due to crushing.

[Brief explanation of drawings]

Fig. 1 is a side view of a conventional corrugated sheet feeding device, Fig. 2 is an enlarged front view of section A in Fig. 1,
Figure 3 is a perspective view of the corrugated board sheet, Figure 4 is a perspective view of the cardboard sheet.
5 is a plan view showing the first embodiment of the transfer device of the present invention, FIG. 6 is an enlarged plan view of the main part in FIG. 5, and FIG.
The cross-sectional view from C to C in the figure, FIGS. 8 and 9 are explanatory diagrams showing the engagement state of the vertical feed roll and the sheet, respectively,
Figure 10 A, B, C, D, Figure 11 A, B, C,
D is the 1st, 2nd, 3rd, 4th, 5th, 6th, respectively.
12 is a detailed plan view of the upper feed roll group in FIG. 10 C, and FIG. -D sectional views, FIGS. 14 and 15 are explanatory diagrams showing the state of engagement between the vertical feed roll and the sheet in the fifth embodiment shown in FIG. 11A, respectively. Explanation of the main parts of the figure, 5...Sheet (plate-like body),
14, 14'...Shaft, 20a, 20b~2
0n...Top feed roll, 20'a, 20'b~2
0'n...Downward feed roll.

Claims (1)

[Claims] 1. In a device that transports a corrugated cardboard sheet by sandwiching it between a group of feed rolls arranged vertically, at least one of the feed roll groups is rotatably supported at both ends and is mutually supported on a single shaft extending in the width direction. The adjacent ones on the shaft are arranged in a staggered manner, and the adjacent ones on the shaft are arranged in a staggered manner.
A corrugated cardboard product, characterized in that it is rotatably supported by bearings that are arranged eccentrically with a 180° phase shift, and that a part of the feed roll is provided with a gear that meshes with a gear that rotationally drives the roll. Paper feeding device for box machine.