JP2670975B2 - Bale waste paper unpacking supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for unpacking bale waste paper, and more specifically, a device for unpacking bale waste paper in which waste paper, which is a raw material for papermaking, is packed under pressure to form a slurry having a predetermined concentration. Regarding

[0002]

2. Description of the Related Art Conventionally, used paper used as a raw material for papermaking has a predetermined amount of used paper of 120 to 150 from the viewpoint of transportation and storage location.
A so-called bale waste paper with a weight of about 1 ton and a height of 1 m × width 1 m × length 2 m is produced by pressurizing at a high pressure of kg / cm ³ and solidifying. When such waste bale paper is used as a papermaking raw material, the waste bale paper is unpacked, dissolved in water, made into a slurry, and then sent to the papermaking process.

[0003]

At this time, the raw material concentration (slurry concentration) in the slurry must be kept within a substantially constant range in order to ensure stable productivity. For example, when the slurry concentration is high Then, there is a problem that a large load is applied to a pump that feeds the slurry, making it difficult to feed the liquid, and if the slurry concentration is low, the processing efficiency deteriorates.

Therefore, it is necessary to appropriately control the amount of waste paper and the amount of water supplied to the dissolving tank (pulper) that dissolves the unpacked used paper in water. However, when only the amount of water supplied to the dissolving tank is controlled. The amount of water that must be reduced when the amount of used paper supplied is small, which means that the amount of water to be processed relative to the size of the dissolving tank decreases. Conversely, when the amount of used paper supplied is large, the amount of water used increases when the amount of used paper is increased. The slurry will overflow.

From the above, in order to make the amount of slurry in the dissolving tank substantially constant and to stably obtain a predetermined processing amount, the amount of waste paper supplied to the dissolving tank in accordance with the slurry concentration in the dissolving tank The amount must be controlled to be approximately constant.

For this reason, as a device for unpacking and supplying a fixed amount of bale waste paper, a belt conveyor is arranged so as to face up and down, and an upper conveyor is rotated in a direction opposite to the direction of transport of the waste paper to recover bale waste paper. There is proposed a crushing unit for unpacking and a take-out conveyor provided with a weighing machine. This device is designed to regulate the speed of the upper and lower conveyors of the crushing section based on the signal from the weighing machine of the take-out conveyor, and thereby to quantitatively supply the bale waste paper while unpacking.

However, in the crushing section composed of the upper and lower conveyors, although the bale waste paper made of newspaper waste paper can be unpacked, one sheet is large in shape and soft,
For example, waste paper such as corrugated cardboard, high-quality paper, and raw materials for magazines causes a rotational movement between the upper and lower conveyors as the upper and lower conveyors move in opposite directions, and is formed into a cylindrical shape and crushed. I couldn't.

Therefore, the present invention sufficiently unpacks the bale waste paper made of various kinds of waste paper, controls the supply amount of the unpacked waste paper to the melting tank, and sends the waste paper as a slurry having a predetermined concentration to the next step. It is an object of the present invention to provide an unpacking and feeding device for used bale waste paper.

[0009]

In order to achieve the above-mentioned object, a bale waste paper unpacking and feeding apparatus according to the present invention comprises: a slat conveyor for bale waste paper unpacking with a variable lifting angle on the unloading section side; Of the tip of the slat conveyor
It is installed above the slat conveyor with a certain space.
Also, it moves in the direction opposite to the slat conveyor feeding direction.
An auxiliary conveyor for unloading , a dissolving tank for mixing waste paper unpacked with the slat conveyor and water to make the waste paper into a slurry state, and a slurry concentration measuring means for measuring a slurry concentration in the dissolving tank. A device for unpacking and supplying a bale waste paper supplied to the loading section side of the slat conveyor in the form of a slurry having a predetermined concentration, according to the slurry concentration measured by the slurry concentration measuring means. Slat conveyor speed and lift angle on the unloading side
It is characterized in that a control means for adjusting the degree is provided.

[0010]

According to the above construction, the large bale waste paper having a high center of gravity falls to the loading section side while rising on the loading section side of the slat conveyor, and is unpacked by the impact at the time of dropping. Ma
Also, it solidifies in a state of containing more water than ordinary waste paper
Burnt or entangled waste paper, some special
Do not drop used waste paper from the unloading side to the loading side.
Although it may rise to the tip of the unloading side,
However, the upper part of the
When it contacts the auxiliary conveyor, it falls to the loading side and falls.
Unpacked due to shock. Since the center of gravity of unpacked waste paper is low, it rises to the end on the unloading side and falls from the end. At this time, by adjusting the rising angle and speed of the slat conveyor, it is possible to control the carry amount of the unpacked waste paper.

Therefore, the concentration of the slurry in the dissolution tank is measured by the slurry concentration measuring means, and the rising angle and speed of the slat conveyor are adjusted according to the slurry concentration to control the amount of waste paper supplied to the dissolution tank. A slurry having a predetermined concentration can be obtained. That is, when the measured slurry concentration is low, the rising angle on the unloading unit side is reduced , and the speed of the slat conveyor is increased to increase the amount of waste paper supply, and when the slurry concentration is high, the rising angle on the unloading unit side is increased. And slat comb
Slower yard speed to reduce waste paper supply.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to an embodiment shown in the drawings. FIG. 1 is a system diagram showing the overall configuration of the unwrapping supply device for used bale waste paper according to the present invention, FIG. 2 is an explanatory view of a slat conveyor, and FIG. 3 is an explanatory view of a measuring device as a slurry concentration measuring means.

The unwrapping supply device for waste bale paper shown in FIG.
A supply conveyor 2 for supplying the bale waste paper 1, a slat conveyor 3 and an auxiliary conveyor 4 for unpacking and quantitatively supplying the bale waste paper 1, and a dissolving tank 5 for dissolving the unpacked waste paper in water to form a slurry. A meter 6 and a calculator 7 which are slurry concentration measuring means for measuring the concentration of the slurry dissolved in the dissolving tank 5, and a control for controlling the slat conveyor 3 in accordance with the slurry concentration obtained by the calculator 7. And part 8.

The slat conveyor 3 has a plurality of slat link plates continuously attached to a conveyor chain. As shown in FIG. 2, a loading section side conveyor frame 31 for guiding the conveyor chain and a loading / unloading unit are provided. By connecting the conveyor belt 32 to the conveyor belt 32 at the hinge portion 33, the rising angle of the conveyor frame 32 at the unloading portion can be changed. The loading section side conveyor frame 31 is fixed to the supply conveyor 2 side in a substantially horizontal direction, and the loading section side conveyor frame 32 is provided.
Activates the cylinder 34 supporting the frame 32 to increase the lifting angle by 3 around the hinge 33.
It is configured to be adjustable in the range of 5 to 45 degrees.

The hinge portion 33 is provided at the center point between the guide portion 35 of the upper loading side conveyor chain and the guide portion 36 of the lower return side conveyor chain of the slat conveyor 3. Therefore, when the lifting angle of the unloading section side conveyor frame 32 is changed, the length of the lower return side conveyor chain changes by an amount corresponding to the change of the length of the upper loading side conveyor chain. You can change the rising angle without. For example, the unloading section side conveyor frame 32
When the ascending angle is increased, the stroke of the upper loading-side conveyor chain is shortened, but the stroke of the lower return-side conveyor chain is correspondingly increased, and the overall length of the conveyor chain is always kept constant. Thereby, it becomes possible to extremely easily adjust the rising angle of the unloading side conveyor frame 32 while simplifying the configuration of the slat conveyor 3.

The auxiliary conveyor 4 provided above the tip end of the slat conveyor 3 on the unloading section side is a slat conveyor in which a number of slat link plates are continuously attached to a conveyor chain, like the slat conveyor 3. Thus, the moving direction of the auxiliary conveyor 4 is set to be opposite to the used paper feeding direction of the slat conveyor 3. The distance between the auxiliary conveyor 4 and the slat conveyor 3 is set to be narrow at the front end on the used paper delivery side and sufficiently wide at the base side.

The auxiliary conveyor 4 supports the loading section side end of the slat conveyor 3 by means of a shaft 41. The loading section side defines only the lower limit position and the loading section side can freely rotate upward. Even if a large lump of waste paper enters between the slat conveyor 3 and the auxiliary conveyor 4, the unloading section side of the auxiliary conveyor 4 rotates upward to release the stress, It is designed to prevent damage to both conveyors.

The bale waste paper 1 supplied from the supply conveyor 2 to the loading section side of the slat conveyor 3 is conveyed to the loading section set at a predetermined rising angle by the operation of the slat conveyor 3, and has a high center of gravity. Large-sized bale waste paper and large lumps fall to the loading section side while rising on the unloading section side. The bale waste paper or the lump of waste paper that has dropped to the loading side is unpacked by the impact of its own drop, and rises again to the loading side. The waste paper, which has a predetermined size due to the unpacking, is raised to the end on the unloading side and supplied to the melting tank 5 from the end. Furthermore, a piece of waste paper of a certain size that could not be fully unpacked in one drop,
It is unpacked to a predetermined size while repeating the fall from the unloading side to the loading side.

Further, solidified paper containing more water than normal waste paper, entangled waste paper, and some special waste paper are loaded from the unloading side. Although it may rise to the tip of the unloading side without falling to the side of the loading section, even in such a case, if the size is a predetermined size or more, the load is loaded when the upper part comes into contact with the auxiliary conveyor 4. It falls to the side of the department and is unpacked due to the impact of falling.

The relationship between the ascending angle on the unloading side of the slat conveyor 3 and the supply amount of unpacked waste paper is, for example, when the ascending angle is 35 degrees, the entire amount is conveyed and supplied, and the ascending angle is 45 degrees. Sometimes it is hardly conveyed. Therefore, by adjusting the ascending angle on the unloading side within this range, it is possible to arbitrarily control the supply amount of unpacked waste paper.

The slat conveyor 3 is provided with a sensor 38 for detecting the amount of waste paper on the conveyor 3, and when the amount of waste paper on the slat conveyor 3 becomes less than a predetermined amount, the supply conveyor 2 is turned off. It is configured to feed the waste bale paper 1 that is operatively stocked on the conveyor onto the slat conveyor 3.

The dissolving tank 5 dissolves and dilutes the dilution water supplied from the dilution water supply pipe 51 and the used paper unpacked and supplied by the slat conveyor 3 by a stirring blade (not shown). The used paper in the slurry state is slurried in the dissolution tank 5, is withdrawn from the slurry delivery pipe 52 at the bottom of the bath, is sent by the pump 53 to the next step via the delivery pipe 54, and a part of the waste paper is sent. , And is sent to the measuring device 6.

As shown in FIG. 3, the measuring device 6 includes a slurry container 62 having a flange portion 61 on an outer edge of an upper edge thereof, and a slurry supply pipe 63 for supplying the slurry from the dissolution tank 5 into the slurry container 62. A weighing scale 64 for measuring the weight of the slurry container 62, a receiving tank 65 provided on the outer peripheral side of the slurry container 62 for receiving the slurry overflowing from the upper edge of the slurry container 62, and a receiving tank 65 inside the receiving tank 65. It is composed of a lead-out pipe 66 for leading out the overflowed slurry and returning it to the dissolution tank 5.

This measuring instrument 6 uses the fact that the fluidity of the slurry changes depending on the slurry concentration, and is more accurate than the case where the slurry concentration is simply determined by measuring the weight of the slurry accumulated in the container and calculating the slurry concentration from the specific gravity difference. Various measurements can be performed. That is, since the fluidity of the slurry decreases as the concentration thereof increases, the fluidity decreases as the concentration of the slurry increases, and the amount of the slurry accumulated on the collar 61 increases, and the weight of the slurry is increased by the weight of the slurry container. Since it adds to the weight of the slurry in 62, the amount of change in weight measured by the weight scale 64 becomes large. Therefore, the change in the slurry concentration can be accurately measured, and the control accuracy can be improved.

The computing unit 7 calculates the slurry concentration from the weight measured by the weight scale 64 of the weighing unit 6 based on the preset relationship between the slurry concentration and the weight. The density is output to the control unit 8.

The control unit 8 controls the rotation speed of the motor 37 of the slat conveyor 3, a position controller 82 for detecting the rising angle of the slat conveyor 3 on the unloading side, and the cylinder 34. It comprises a position detector 83 provided in the part and a driver 84 for expanding and contracting the cylinder 34 by the output of the position controller 82 to change the rising angle of the slat conveyor 3 on the unloading side.

The controller 8 operates so as to reduce the amount of used paper supplied to the dissolving tank 5 when the slurry concentration calculated by the calculator 7 is high, and increases the amount of used paper supplied to the dissolving tank 5 when the slurry concentration is low. Works like. That is,
When the slurry concentration obtained by the calculator 7 is high, the speed controller 81 lowers the rotation speed of the motor 37 to decelerate the slat conveyor 3 and raises the unloading side to reduce the amount of used paper supply. On the other hand, when the slurry concentration obtained by the calculator 7 is high, the speed controller 81 increases the rotation speed of the motor 37 to speed up the slat conveyor 3 and lowers the unloading side to increase the amount of used paper supply. .

In this way, the concentration of the slurry in the dissolution tank 5 is continuously measured by the measuring device 6, and the amount of waste paper supplied from the slat conveyor 3 is adjusted according to the slurry concentration at that time, whereby the dissolution is performed. The concentration of the slurry in the tank 5 can be controlled to a substantially constant concentration, and the raw material concentration of the slurry to be sent to the next step can be kept substantially constant.

[0029]

As described above, in the unpacking and feeding device for bale waste paper according to the present invention, the rising angle on the unloading side is variable.
Slat conveyor for unwrapping bale waste paper and the slats
The slat conveyor is located above the tip of the conveyor on the unloading side.
Slat conveyor, which is installed at a predetermined interval from the
Auxiliary conveyor for collapsing cargo that moves in the opposite direction to the delivery direction
And waste paper and water unpacked on the slat conveyor
It is equipped with a dissolution tank that mixes
Therefore, large waste bale paper with a high center of gravity
Dropped to the loading side while climbing the unloading side
However, it will be unpacked due to the impact of falling,
Also solidified in a state of containing a large amount of water, entangled
Shaped waste paper and some special condition waste paper
From the loading side to the loading side without dropping from the loading side to the loading side.
However, even in such a case, the
For the upper size, the upper part contacts the auxiliary conveyor
At that point, it falls to the loading side and is unpacked due to the impact of dropping.
Since that, the bale waste paper comprising various waste paper can be supplied to the dissolution tank continuously sufficiently <br/> unpack, moreover, the slurry concentration measuring means for measuring the slurry density in the dissolving tank,
Slurry concentration measured by the slurry concentration measuring means
Slat conveyor speed and unloading side rise according to
Control means for adjusting the angle, the slurry concentration
Slats according to the slurry concentration measured by the measuring means
It is possible to control the conveyor speed and the lifting angle on the unloading side.
By this, the amount of waste paper supplied into the dissolution tank can be accurately adjusted, and the slurry having a predetermined concentration can be stably sent to the next step, and the efficiency of the paper manufacturing step can be improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a systematic diagram showing an overall configuration of an unpacking supply device for bale waste paper.

FIG. 2 is an explanatory diagram of a slat conveyor.

FIG. 3 is an explanatory diagram of a measuring device that is a slurry concentration measuring unit.

[Explanation of symbols]

1 ... Bale waste paper, 2 ... Supply conveyor, 3 ... Slat conveyor, 4 ... Auxiliary conveyor, 5 ... Melting tank, 6 ... Measuring device, 7 ... Computing device, 8 ... Control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Katsumata 2 at 49 Kusawa, Fuji City, Shizuoka Prefecture Katsuma Welding Industry Co., Ltd. (72) Inventor Fumiko Katsuma 2 2 at 49 Hisawazawa, Fuji City, Shizuoka Prefecture Katsumata Welding Co., Ltd. (56) References JP-A-5-9882 (JP, A) JP-A-5-337453 (JP, A) JP-A-5-72109 (JP, A) Actual development Sho-54-129603 (JP, U) )

Claims (1)

(57) [Claims] 1. A slat conveyor for unpacking bale waste paper, which has a variable rising angle on the unloading side, and the slat conveyor.
Place the slat conveyor above the tip of the unloading side of the yard.
Delivery of slat conveyors at regular intervals
Auxiliary conveyor for crushing goods that moves in the opposite direction,
Includes a dissolving tank to unpacking used paper and slurry waste paper is mixed with water in the slat conveyor, and a slurry concentration measuring means for measuring the slurry concentration in the dissolution tank, loading of the slat conveyor A device for unpacking bale waste paper supplied to the unit side and supplying it in the form of a slurry having a predetermined concentration, the speed of the slat conveyor and the unloading unit according to the slurry concentration measured by the slurry concentration measuring means. unpacking feeder bale waste paper, characterized in that it comprises a control means for adjusting the angle of elevation of the side.