JP2014015285A - Unloading method of printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an unloading method where a plurality of newspaper bundles can be made on an unloading conveyer moving at a constant speed without using a rear cutting plate only unloading printed matter held one by one by a plurality of grippers moving at a constant speed.SOLUTION: A plurality of unloading apparatuses 32a-32j unloading printed matter N by releasing grippers 31 are arranged at a constant interval Dp in a moving direction of the grippers 31. When the plurality of the unloading apparatuses are operated sequentially from an upstream side and the printed matter is unloaded, a relational equation denoted as LDp-(S+NL)>0 is satisfied (wherein, LDp=(Dn-1)×Dp; S=(LDp-Gp)×FCv; FCv=Cv/Gv; NL is length (mm) of printed matter; Dn is the number of unloading apparatuses; Dp is interval (mm) between unloading apparatuses; Gp is interval (mm) between grippers; Cv is moving speed (m/s) of unloading conveyer; Gv is moving speed (m/s) of grippers; and Gv>Cv).

Description

  The present invention is to unload a printed product, which is gripped by each of a plurality of grippers moving at a constant speed, onto an unloading conveyor moving at a constant speed, and to produce a plurality of printed bundles on the unloading conveyor. The present invention relates to a method for unloading printed matter.

  For example, a newspaper is used as the printed matter. A newspaper printed by a rotary press is cut and folded by a folding machine and is discharged from a folding conveyor of the folding machine in a state where a part is stacked in a tile shape. These newspapers are grabbed partly by a plurality of grippers attached to the circulating chain at regular intervals, and are transported to the conveyor in front of the counter stacker at the shipping station where the number of copies is sorted for the dealer. The newspaper is unloaded.

  By the way, in a rotary press, there may be uneven print quality due to instability of water and ink supply at the start of printing and sudden changes in printing conditions during printing. May be necessary. In addition, it is necessary to determine whether or not it is good before and after the paper splicing operation.

  For this reason, a range of discrimination is automatically or manually specified from newspapers gripped by a gripper and continuously conveyed, and once unloaded from the gripper onto the unloading conveyor in the middle of transportation, a multi-stage type is formed as a newspaper bundle. The paper is fed into a paper discharge rack or the like.

  Specifically, the conventional method is described. Unloading newspapers with a single unloading device on the unloading conveyor creates a continuous flow of newspapers stacked in tiles on the unloading conveyor. A cutting plate is inserted in the middle of the flow to stop the subsequent flow, and completely separates the trailing edge of the previously fed newspaper and the leading edge of the stopped newspaper. The newspapers that have been sent in advance become one newspaper bundle and are stored as a bundle in a paper discharge rack waiting in front of the flow. While the succeeding newspaper is stopped, the paper discharge rack is gradually lowered, and when the upper paper discharge rack is lowered to the fixed position, the back plate is lifted, and the paper stack is lowered to the predetermined position. Stored. In this way, a newspaper bundle is fed into each paper discharge rack by sequentially separating the flow of newspapers with a back-cutting plate. Then, the newspaper bundle is sequentially taken out from the paper discharge rack that has been lowered to the newspaper receiving position, and the quality is determined.

  As described above, Patent Documents 1 and 2 describe a technique for producing a plurality of newspaper bundles on a conveyor using a back-cutting plate. It is necessary to read the interval between newspapers stacked in tiles with high accuracy and operate the back-cutting plate at high speed. Furthermore, there is a problem that the number of back cuts (number of newspaper bundles) is restricted because newspapers increase in a dam shape after the back cut.

  Therefore, there has been a demand for a technique for producing a plurality of newspaper bundles on a conveyor without using a back-cutting plate.

Japanese Patent Laid-Open No. 5-178522 JP-A-8-133555

  The problem to be solved by the present invention is to unload the printed matter, which is gripped by each of the plurality of grippers moving at a constant speed, onto the unloading conveyor moving at a constant speed as in the conventional case. An object of the present invention is to provide an unloading method capable of producing a plurality of newspaper bundles on an unloading conveyor without using a plate.

One embodiment of the present invention is to unload a printed product that is moved at a constant speed and gripped by each of a plurality of grippers arranged at regular intervals onto an unloading conveyor that moves at a constant speed. A method for unloading a printed material on which a plurality of bundles of printed materials are produced, wherein a plurality of unloading devices for unloading the printed material by opening the gripper are arranged at regular intervals in the moving direction of the gripper. The following relational expression (1) is satisfied when the loading device is sequentially operated from the upstream side to unload the printed matter.
LDp− (S + NL)> 0 (1)
Here, LDp = (Dn−1) × Dp,
S = (LDp−Gp) × FCv,
FCv = Cv / Gv,
NL is the length of the printed material (mm)
Dn is the number of unloading devices,
Dp is the distance between unloading devices (mm),
Gp is the distance between grippers (mm),
Cv is the moving speed of the unloading conveyor (m / s),
Gv is the moving speed (m / s) of the gripper.
Gv> Cv.

  Another aspect of the present invention is to unload a printed product, each of which is gripped by a plurality of grippers arranged at regular intervals and moving at a constant speed, onto an unloading conveyor that moves at a constant speed. A method of unloading a printed material for producing a plurality of printed material bundles on a conveyor, wherein a plurality of unloading devices that unload the printed material by opening the gripper are arranged at regular intervals in the moving direction of the gripper. When producing a bundle of printed materials, unload the printed material using one of the unloading devices on the downstream side of the plurality of unloading devices, and when producing a bundle of printed materials for the second and subsequent times, A plurality of unloading devices are sequentially operated from the unloading device upstream of the unloading device used when producing the bundle of the first printed matter among the plurality of unloading devices. Characterized by satisfying (1) It is intended.

  According to the present invention, a plurality of unloading devices for unloading the printed matter by opening the gripper are arranged so as to satisfy the relational expression (1). Multiple newspaper bundles can be produced on the conveyor.

The structure of the newspaper carrier equipment which conveys the newspaper continuously discharged | emitted from a rotary press in a newspaper printing equipment to the counter stacker of a shipping packing room is shown. The detailed structure of the principal part of an intermediate unloading part is shown. The mode of unloading of printed matter (newspaper) in the example of the present invention is shown. The unloaded newspaper shows that it has overtaken the previously unloaded newspaper.

  Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 shows the structure of a newspaper carrier facility for transporting newspapers continuously discharged from a rotary press in a newspaper printing facility to a counter stacker at a shipping station.

  Newspapers printed by the rotary press are cut and folded by the folding machine 10 and are discharged from the discharge conveyor 11 of the folding machine in a state where parts are stacked in tiles. These newspapers are gripped part by part by a plurality of grippers attached to the chain 30a circulating in the guide 30 at regular intervals in the loading section 20, and the counter stacker of the shipping station 40 in which the number of copies is sorted for a store. 41a and 41b are transported to the front conveyors 42a and 42b, and the newspapers are unloaded on the conveyors 42a and 42b.

  As explained above, in a rotary press, uneven printing quality may occur due to instability of water and ink supply at the start of printing and sudden changes in printing conditions during printing. It may be necessary to determine whether or not. In addition, it is necessary to determine whether or not it is good before and after the paper splicing operation. For this reason, a range of discrimination is automatically or manually specified from newspapers held by the gripper and continuously conveyed, and the intermediate unloading unit 50 in the middle of conveyance temporarily unloads from the gripper onto the unloading conveyor 51. As a bundle of newspapers, it is fed into a multistage discharge rack 53 via an introduction conveyor 52.

  In the present embodiment, the unloading method of the present invention is applied to the intermediate unloading portion 50. FIG. 2 shows a detailed configuration of the main part of the intermediate unloading part.

  As described with reference to FIG. 1, a plurality of grippers 31 are attached to the chain 30 a circulating in the guide 30 at a constant interval Gp (mm). Each gripper 31 moves leftward in FIG. 2 at a constant speed Gv (m / s). A plurality of unloading devices are arranged along the chain 30a at a constant interval Dp (mm) in the moving direction of the gripper 31. In this embodiment, ten unloading devices 32a to 32j are arranged. Each of the unloading devices 32a to 32j includes an actuator. By operating the actuator, the gripper 31 is opened, and the newspaper N held by each of the plurality of grippers 31 is moved at a constant speed Cv (m / s). The unloading conveyor 51 is unloaded.

  Here, in the intermediate unloading section 50, the moving speed Gv of the gripper 31 is made larger than the moving speed Cv of the unloading conveyor 51. That is, when Gv = Cv, since it is difficult for the newspaper to unload on the unloading conveyor 51 even when the gripper 31 is opened, Gv> Cv. If the difference between Cv and Gv is too small, the unloading conveyor needs to be long, and if the difference is too large, the unloading pitch becomes too small, which hinders the conveying posture. Therefore, Cv / Gv = FCv = 0.5 to 0.8 is preferable.

Hereinafter, an embodiment of a method for unloading the newspaper N in the intermediate unloading section 50 shown in FIG. The set values in this example are as follows.
・ Length of newspaper N NL = 273mm
-Number of unloading devices Dn = 10
・ Distance between unloading devices Dp = 127mm
・ Gpipper gap Gp = 63.5mm
・ Gripper moving speed Gv = 1.6 m / s
Unloading conveyor speed factor FCv = Cv / Gv = 0.7
・ Movement speed of unloading conveyor Cv = 1.12m / s
・ Unloading device pitch coefficient FDp = Dp / Gp = 2
・ Total length of unloading device LDp = (Dn−1) × Dp = 1143 mm

  In this embodiment, the printing speed of the rotary press is 180,000 copies / h (one-shot 90,000 copies / h), and Gv = Gp × for a gripper with Gp = 63.5 mm to grip all the newspapers. Since it is the number of copies per hour, Gv = 63.5 × 90,000 / h = 63.5 × 25 / s = 1.6 m / s. In this embodiment, FCv = 0.7, so Cv = 1.12 m / s.

  FIG. 3 shows how the newspaper N is unloaded in this embodiment. In the present embodiment, the first newspaper bundle is produced using only the most downstream unloading device 32j.

  That is, as shown in FIG. 3A, while the newspaper N gripped by the gripper 31 passes through the intermediate unloading section 50, the gripper grips the newspaper instructed to start unloading by the unloading device 32j on the most downstream side. When 31a arrives, the unloading operation is started.

  At this time, the relationship between the gap Gp between the grippers (interval between newspapers before unloading) and the interval Cp between newspapers unloaded on the unloading conveyor 51 is Cp = Gp × FCv. Since the moving speed Gv of the gripper 31 is larger than the moving speed Cv of the unloading conveyor 51, FCv = Cv / Gv <1 and Cp <Gp. That is, when only one unloading device (the most downstream unloading device 32j) is used for unloading, the newspaper bundle N1 stacked with a certain interval Cp is produced from the above relationship (FIG. 3B). reference).

  In the present embodiment, the number of copies of a single bundle of newspapers is 40. Therefore, the gripper 31b of the 41st copy counting from the newspaper first unloaded by the unloading device 32j at the most downstream position is the unloading device 32a at the uppermost stream. Is reached, the uppermost unloading device 32a is also activated to produce the second newspaper bundle. At this time, the number of newspapers unloaded by the most downstream unloading device 32j is 23 parts, and thereafter, the 17th newspaper located between the most downstream unloading device 32j and the most upstream unloading device 32a is the highest. Unloading is performed by the downstream unloading device 32j.

  In the present embodiment, in order to produce the second newspaper bundle N2, the unloading started at the most upstream unloading device 32a is set to only 4 parts, and from the next fifth part, the unloading device 32b From the next 9th part, the operation of the unloading device is sequentially switched to the downstream while unloading 4 parts each by the unloading device 32c in the order of the unloading device 32c. In other words, the unloading devices 32a to 32j are sequentially operated from the upstream side to unload four parts at a time by one unloading device.

  At this time, between the rear end of the last newspaper of the first newspaper bundle N1 and the front end of the first newspaper of the second newspaper bundle N2 (the newspaper unloaded by the uppermost unloading device 32a). Is obtained from the following relationship.

Considering the position of the most upstream unloading device 32a as a reference, the advance distance S of the newspaper on the unload conveyor is the length obtained by multiplying the distance (LDp-Gp) the gripper has advanced by the unload conveyor speed factor FCv.
S = (LDp−Gp) × FCv
Here, LDp is (Dn−1) × Dp.

And the said clearance gap A is represented by the following formula | equation.
A = LDp- (S + NL)

That is, if this gap A is larger than 0, that is, the following relational expression (1) is satisfied, a gap is formed between the first newspaper bundle N1 and the second newspaper bundle N2, and a plurality of one-sheet newspaper bundles are formed. Can be made.
LDp− (S + NL)> 0 (1)

  In this embodiment, LDp = (Dn−1) × Dp = (10−1) × 127 = 1143 mm, S = (LDp−Gp) × FCv = (1143-63.5) × 0.7 = 755.65 mm NL = 273 mm, A = 1143− (755.65 + 273) = 114.35 mm, and a gap A of 114.35 mm is formed between the first newspaper bundle N1 and the second newspaper bundle N2. .

Further, in the second newspaper bundle N2, the interval between newspapers on the unloading conveyor 51 at the time of switching the unloading device (unloading position) is distinguished from the above-described interval Cp between normal newspapers. Assuming CCp, CCp = ((FDp + 1) × FCv × Gp) − (Gp × FDp)

Here, since FCv × Gp = Cp and Gp × FDp = Dp,
CCp = ((FDp + 1) × Cp) −Dp, and in the example, CCp = 6.35 mm.

In other words, the interval between the normal newspapers Cp = FCv × Gp = 0.7 × 63.5 = 44.45 mm is narrower by 38.1 mm. This value is the dimension that shortens the total length of a group of newspaper bundles each time the unloading device is switched once. When 40 newspapers are unloaded with only one unloading device, the total length L ₄₀ from the top of the first copy to the rear end of the 40th copy is L ₄₀ = (Cp × 39) + NL = (44. 45 × 39) + 273 = 2008.5 mm
On the other hand, the total length L ₄₀₉ when switching is performed 9 times with 10 unloading devices is L ₄₀₉ = L ₄₀ − (Cp−CCp) × 9
= 2008.5- (44.45-6.35) × 9 = 1665.6,
The overall length of the newspaper bundle is greatly reduced.

  Here, the interval CCp between the newspapers on the unloading conveyor 51 at the time of switching the unloading device (unloading position) is CCp> from the viewpoint of eliminating the running of the newspaper in the newspaper bundle and maintaining a good conveying posture. Most preferably, it is zero. That is, considering the state in which the newspaper bundle is fed into the paper discharge rack, when CCp> 0, the newspaper stack hits the back plate of the paper discharge rack in order from the lower newspaper, so the newspaper bundles are stacked on the paper discharge rack in an orderly manner. . However, even if CCp <0, the newspaper bundle can be conveyed, and in reality, CCp = −Cp (−44.45 mm in this embodiment) is allowed.

  The reason will be described with reference to FIG. FIG. 4 shows a state where the unloaded newspaper has overtaken the previously unloaded newspaper, that is, a state where CCp <0. In this state, when the absolute value of CCp is small, the upper newspaper is sent to the paper discharge rack with the lower newspaper slightly covered with the lower newspaper. However, since the covered portion is small, the impact hit the back plate of the paper discharge rack. The top of the lower newspaper and the upper newspaper are easy to line up, and the stack of newspapers stacks neatly. However, when the absolute value of CCp is increased, the upper and lower newspapers are likely to be displaced due to the upper newspaper covered by the lower newspaper even when the shock hits the back plate of the paper discharge rack. In addition, the tip of the upper newspaper is easily bent, and the newspaper bundle on the paper discharge rack is easily disturbed. If the newspaper bundle is disturbed, it is impossible to efficiently judge the quality of the newspaper, and a folded newspaper cannot be sold even if it is a good paper. In order to reliably prevent such a problem from occurring, it is considered that the limit is up to CCp = −Cp. Therefore, it is preferable to satisfy CCp ≧ −Cp.

  Returning to the description of the unloading method according to FIG. 3, in order to produce the second newspaper bundle N2, as described above, the unloading position is sequentially changed from the most upstream unloading device 32a (unloading position) to the downstream side, When unloading is completed by the seventh unloading device 32g, the remaining three unloading devices have 12 parts (three unloading devices x 4) and the number of copies that have passed through the most upstream unloading device 32a. Match. At this time, in order to produce the third newspaper bundle N3, as shown in FIG. 3D, the thirteenth newspaper held by the gripper 31c is unloaded by the most upstream unloading device 32a. Thereafter, in the same manner as the production of the second newspaper bundle N2, the third newspaper bundle N3 is produced while changing the unloading position for four copies per unloading device. In parallel, in order to produce the second newspaper bundle N2, unloading from the eighth unloading device 32h to the most downstream unloading device 32j is completed (FIG. 3 (e)).

  As described above, when the second and subsequent newspaper bundles are produced, the newspapers are unloaded when the first newspaper producing the newspaper bundle reaches the uppermost unloading device 32a, and then sequentially downstream. Change the unloading position.

  By repeating the above operations, a plurality of newspaper bundles separated in sequence can be produced. The produced newspaper bundle is fed into the multistage discharge rack 53 via the introduction conveyor 52 as described with reference to FIG. The introduction conveyor 52 may be provided with a partition plate mechanism in order to widen a gap (interval) between the newspaper bundles. In the present invention, since the gap A between the newspaper bundles is larger than 0, the partition plate mechanism can be realized by a simple mechanism and control as compared with the conventional back plate mechanism.

  In the above embodiment, the first newspaper bundle N1 is produced using only the most downstream unloading device 32j. However, the first newspaper bundle N1 is the most similar to the second and subsequent newspaper bundles. The unloading device 32a from the upstream side to the unloading device 32j at the most downstream side may be sequentially used to unload four parts at each unloading device. Also in this case, since the last newspaper of the first newspaper bundle N1 is unloaded by the unloading device 32j on the most downstream side, the relational expression (1) (LDp− (S + NL)> 0 as in the previous embodiment. ), It is possible to produce a plurality of newspaper bundles that are sequentially separated.

  Further, in this example, the number of newspaper bundles per segment is 40, and when making the second and subsequent newspaper bundles, all 10 unloading devices are used to unload four copies. The number of parts to be unloaded by each unloading device need not be equal. Further, depending on the number of newspaper bundles, not all unloading devices may be used. In this case, the total length of the unloading device to be used is the LDp.

  Here, in Table 1, the following parameters are changed to change the gap A (mm) between the newspaper bundles, the interval Cp (mm) between the normal newspapers, and the unloading device (unloading position). The result of calculating the distance CCp (mm) between newspapers, the distance Dp (mm) between unloading devices, and the total length LDp (mm) of the unloading devices is shown.

Parameters-Unloading conveyor speed factor FCv (Cv / Gv)
・ Unloading device pitch coefficient FDp (Dp / Gp)
・ Number of unloading devices (number used) Dn

  The length NL of the newspaper was 273 mm, and the gap Gp between the grippers was fixed at 63.5 mm.

  In Table 1, it is within the scope of the present invention that the gap A between newspaper bundles exceeds 0.

  The method for unloading printed matter of the present invention can be applied not only to the intermediate unloading section 50 described in the embodiment but also to the shipping place 40 shown in FIG. That is, the unloading method of the present invention is applied to the conveyors 42a and 42b in front of the counter stackers 41a and 41b of the shipping station 40, and a plurality of newspaper bundles separated on the conveyors 42a and 42b are produced. It can also be sent to the stackers 41a and 41b.

10 Folding machine 11 Discharge conveyor 20 Loading section 30 Guide 30a Chain 31, 31a, 31b, 31c Gripper 32a-32j Unloading device 40 Shipping place 41a, 41b Counter stacker 42a, 42b Conveyor 50 Intermediate unloading section 51 Unloading conveyor 52 Introduction Conveyor 53 Output rack N Newspaper (printed matter)
N1-N3 Newspaper bundle (bundle of printed matter)

Claims (2)

A printed product that is moved at a constant speed and gripped by each of a plurality of grippers arranged at regular intervals is unloaded on a unloading conveyor that moves at a constant speed, and a plurality of bundles of printed materials are placed on the unloading conveyor. A method for unloading a printed material to be produced,
When a plurality of unloading devices for unloading the printed material by opening the gripper are arranged at regular intervals in the direction of movement of the gripper, and when the printed materials are unloaded by sequentially operating the plurality of unloading devices from the upstream side, A method for unloading printed matter that satisfies the relational expression (1).
LDp− (S + NL)> 0 (1)
Here, LDp = (Dn−1) × Dp,
S = (LDp−Gp) × FCv,
FCv = Cv / Gv,
NL is the length of the printed material (mm)
Dn is the number of unloading devices,
Dp is the distance between unloading devices (mm),
Gp is the distance between grippers (mm),
Cv is the moving speed of the unloading conveyor (m / s),
Gv is the moving speed (m / s) of the gripper.
Gv> Cv. A printed product that is moved at a constant speed and gripped by each of a plurality of grippers arranged at regular intervals is unloaded on a unloading conveyor that moves at a constant speed, and a plurality of bundles of printed materials are placed on the unloading conveyor. A method for unloading a printed material to be produced,
When a plurality of unloading devices that open the gripper and unload the printed material are arranged at regular intervals in the movement direction of the gripper, and a first bundle of printed materials is produced, the downstream side of the plurality of unloading devices When the printed material is unloaded using one of the unloading devices to produce a bundle of the second and subsequent printed materials, the plurality of unloading devices are connected to the first unloading device. A method for unloading printed matter, which is sequentially operated from the unloading device upstream of the unloading device used when producing a bundle of printed matter, and satisfies the following relational expression (1).
LDp− (S + NL)> 0 (1)
Here, LDp = (Dn−1) × Dp,
S = (LDp−Gp) × FCv,
FCv = Cv / Gv,
NL is the length of the printed material (mm)
Dn is the number of unloading devices,
Dp is the distance between unloading devices (mm),
Gp is the distance between grippers (mm),
Cv is the moving speed of the unloading conveyor (m / s),
Gv is the moving speed (m / s) of the gripper.
Gv> Cv.

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