GB2036699A - Sheet delivery apparatus - Google Patents

Sheet delivery apparatus Download PDF

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Publication number
GB2036699A
GB2036699A GB7938699A GB7938699A GB2036699A GB 2036699 A GB2036699 A GB 2036699A GB 7938699 A GB7938699 A GB 7938699A GB 7938699 A GB7938699 A GB 7938699A GB 2036699 A GB2036699 A GB 2036699A
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GB
United Kingdom
Prior art keywords
sheet
gripper
gripper carriage
path
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7938699A
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GB2036699B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polygraph Leipzig Kombinat Veb
Original Assignee
Polygraph Leipzig Kombinat Veb
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polygraph Leipzig Kombinat Veb filed Critical Polygraph Leipzig Kombinat Veb
Publication of GB2036699A publication Critical patent/GB2036699A/en
Application granted granted Critical
Publication of GB2036699B publication Critical patent/GB2036699B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/041—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands and introducing into a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/683—Slowing-down from chain delivery

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Discharge By Other Means (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Abstract

A sheet delivery apparatus for use with a sheet-processing machine comprises a sheet delivery station, a conveyor (1) displaceable along an arcuate path portion (1.1) in the region of the sheet delivery station, means defining an arcuate sheet gripper carriage path portion (16) concentric with the arcuate conveyor path portion (1.1), a plurality of sheet gripper carriages (5) displaceable along the arcuate sheet gripper carriage path portion, and a plurality of coupling means such as rods (2) each coupling a respective sheet gripper carriage (5) to a respective portion of the conveyor for displacement of the sheet gripper carriages (5) on advancement of the conveyor (1). Said conveyor portions are at a spacing from one another which is equal to the length of the arcuate conveyor path portion (1.1). The gripper carriages are retarded before entering the arcuate portion of their path and accelerated before leaving it. <IMAGE>

Description

SPECIFICATION Sheet delivery apparatus The present invention relates to a sheet delivery apparatus for use in a sheet-processing machine such as a printing machine.
It is known in flyer sheet deliverers to reduce the conveying speed of a sheet to be deposited at the instant when the sheet is deposited in order to obtain a well layered stack.
DD-PS 87 048 discloses an apparatus in which a chain is deflected by a deflecting wheel arranged eccentrically of a circular arcuate gripper carriage deflection path. The axis of the chain deflection wheel is arranged below the centre point of the gripper carriage deflection path.
After depositing the sheet, the speed of the gripper carriage is again increased up to the chain speed.
The retardation and acceleration of the gripper carriage leads to dynamic forces which cause high loading of chains, gripper carriages and their guides.
Apart from increasing wear in the gripper carriages and chains, the running precision of the entire printing machine is impaired, whereby the performance capability of the printing machine and the operational reliability of the flyer sheet deliverer are restricted.
According to the present invention, there is provided a sheet delivery apparatus for use with a sheet-processing machine, comprising a sheet delivery station, a conveyor displaceable along a path having an arcuate portion in the region of the sheet delivery station, means defining a sheet gripper carriage path having an arcuate portion concentric with the arcuate portion of the conveyor path, a plurality of sheet gripper carriages displaceable along the sheet gripper carriage path, and a plurality of coupling means each coupling a respective sheet gripper carriage to a respective portion of the conveyor for displacement of the sheet gripper carriages on advancement of the conveyor, said conveyor portions being at a spacing from one anotherwhich is equal to the length of the arcuate portion of the conveyor path.
Awheel may be provided with such a great diameter that a gripper carriage is disposed at the starting point of an acceleration phase when a subsequent gripper carriage is at a starting point of a retardation phase. Acceleration and retardation distance are traversed by two adjacent gripper carriages in the same phase so that the driving torque fluctuations occurring through the necessary retardation are compensated by the thereby required acceleration. The geometric relationships between the diameter of the wheel and the arcuate portion of the gripper carriage path and the length of the coupling means may be such that the coupling means during the guidance of the gripper carriages on the arcuate portion of the gripper carriage path is almost tangential to the arcuate portion of the gripper carriage path.The dynamic additional loadings for gripper carriage guide elements such as the arcuate portion of the gripper carriage path, rollers, and roller pins are thereby almost zero in the arcuate region.
An embodiment of the present invention will now be more particularly described by way of example and with reference to the accompanying drawing in which Figure 1 shows a flyer sheet deliverer in a sheet deposit region and Figure 2 shows driving torque fluctuations of two gripper carriages moving through the deposit region.
Figure 1 shows a side elevation of a flyer sheet deliverer in a sheet deposit region. The flyer sheet deliverer comprises a chain circle 1, to which are fastened gripper carriages 5 moved in a gripper carriage guide 4 by guide rods 2 in a gripper carriage articulation point 3. Several gripper carriages 5 are equally spaced from one another on the flyer sheet deliverer. The deflection of the gripper carriages takes place through a circularly arcuate gripper carriage path 6, centrally of which is arranged a wheel 7 having a greater radius, for the chain circle 1. The diameter of the wheel 7 is such that the part of the circular arc 1.1, forming the chain circle 1, of the wheel 7 has a legnth which corresponds to the spacing of two adjacent gripper carriage articulation points 3.
The geometric relationships of wheel 7, arcuate gripper carriage path 6 and guide rods 2 relative to one another are such that the guide rod 2 during the entire circular arc phase of the gripper carriage 5 is tangential to the arcuate gripper carriage path 6.
A sheet 8 is taken over by the gripper carriage 5 from the last printing unit (not shown) of a printing machine, conveyed over a deposit stack 9, freed and deposited on the stack 9. To reduce the motional energy of the sheet 8 at the sheet deposit location, the gripper carriage 5.1 with the sheet 8 is slowed down.
The retardation starts at the point V1 when the gripper carriage articulation point 3 enters into the circular path 1.1 and at the point V2. From the point V2 to B1, the gripper carriage 5 moves at constant speed and is subsequently accelerated up to the point B2.
Through the retardation of the gripper carriage 5.1 from the point V1to V2 and the acceleration of the gripper carriage 5.2 from B1 to B2 fluctuations of the driving torque are caused in the uniformly moved driving system of the machines.
The driving torque fluctuations, which occur at the carriage drive shaft (not shown), are illustrated in Figure 2. The moments M are negative in the region V1to V2 and positive in the region B1 to B2. The positive and negative moments are equal. Since the spacing between the points V1 and B1 correspond to a mach i n e eycle, they significantly compensate each other. The particular advantage of the compensation is that the unavoidable discontinuity phases occurring during each carriage retardation are utilized for compensation of the fluctuations of the driving torque.
1. A sheet delivery apparatus for use with a
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Sheet delivery apparatus The present invention relates to a sheet delivery apparatus for use in a sheet-processing machine such as a printing machine. It is known in flyer sheet deliverers to reduce the conveying speed of a sheet to be deposited at the instant when the sheet is deposited in order to obtain a well layered stack. DD-PS 87 048 discloses an apparatus in which a chain is deflected by a deflecting wheel arranged eccentrically of a circular arcuate gripper carriage deflection path. The axis of the chain deflection wheel is arranged below the centre point of the gripper carriage deflection path. After depositing the sheet, the speed of the gripper carriage is again increased up to the chain speed. The retardation and acceleration of the gripper carriage leads to dynamic forces which cause high loading of chains, gripper carriages and their guides. Apart from increasing wear in the gripper carriages and chains, the running precision of the entire printing machine is impaired, whereby the performance capability of the printing machine and the operational reliability of the flyer sheet deliverer are restricted. According to the present invention, there is provided a sheet delivery apparatus for use with a sheet-processing machine, comprising a sheet delivery station, a conveyor displaceable along a path having an arcuate portion in the region of the sheet delivery station, means defining a sheet gripper carriage path having an arcuate portion concentric with the arcuate portion of the conveyor path, a plurality of sheet gripper carriages displaceable along the sheet gripper carriage path, and a plurality of coupling means each coupling a respective sheet gripper carriage to a respective portion of the conveyor for displacement of the sheet gripper carriages on advancement of the conveyor, said conveyor portions being at a spacing from one anotherwhich is equal to the length of the arcuate portion of the conveyor path. Awheel may be provided with such a great diameter that a gripper carriage is disposed at the starting point of an acceleration phase when a subsequent gripper carriage is at a starting point of a retardation phase. Acceleration and retardation distance are traversed by two adjacent gripper carriages in the same phase so that the driving torque fluctuations occurring through the necessary retardation are compensated by the thereby required acceleration. The geometric relationships between the diameter of the wheel and the arcuate portion of the gripper carriage path and the length of the coupling means may be such that the coupling means during the guidance of the gripper carriages on the arcuate portion of the gripper carriage path is almost tangential to the arcuate portion of the gripper carriage path.The dynamic additional loadings for gripper carriage guide elements such as the arcuate portion of the gripper carriage path, rollers, and roller pins are thereby almost zero in the arcuate region. An embodiment of the present invention will now be more particularly described by way of example and with reference to the accompanying drawing in which Figure 1 shows a flyer sheet deliverer in a sheet deposit region and Figure 2 shows driving torque fluctuations of two gripper carriages moving through the deposit region. Figure 1 shows a side elevation of a flyer sheet deliverer in a sheet deposit region. The flyer sheet deliverer comprises a chain circle 1, to which are fastened gripper carriages 5 moved in a gripper carriage guide 4 by guide rods 2 in a gripper carriage articulation point 3. Several gripper carriages 5 are equally spaced from one another on the flyer sheet deliverer. The deflection of the gripper carriages takes place through a circularly arcuate gripper carriage path 6, centrally of which is arranged a wheel 7 having a greater radius, for the chain circle 1. The diameter of the wheel 7 is such that the part of the circular arc 1.1, forming the chain circle 1, of the wheel 7 has a legnth which corresponds to the spacing of two adjacent gripper carriage articulation points 3. The geometric relationships of wheel 7, arcuate gripper carriage path 6 and guide rods 2 relative to one another are such that the guide rod 2 during the entire circular arc phase of the gripper carriage 5 is tangential to the arcuate gripper carriage path 6. A sheet 8 is taken over by the gripper carriage 5 from the last printing unit (not shown) of a printing machine, conveyed over a deposit stack 9, freed and deposited on the stack 9. To reduce the motional energy of the sheet 8 at the sheet deposit location, the gripper carriage 5.1 with the sheet 8 is slowed down. The retardation starts at the point V1 when the gripper carriage articulation point 3 enters into the circular path 1.1 and at the point V2. From the point V2 to B1, the gripper carriage 5 moves at constant speed and is subsequently accelerated up to the point B2. Through the retardation of the gripper carriage 5.1 from the point V1to V2 and the acceleration of the gripper carriage 5.2 from B1 to B2 fluctuations of the driving torque are caused in the uniformly moved driving system of the machines. The driving torque fluctuations, which occur at the carriage drive shaft (not shown), are illustrated in Figure 2. The moments M are negative in the region V1to V2 and positive in the region B1 to B2. The positive and negative moments are equal. Since the spacing between the points V1 and B1 correspond to a mach i n e eycle, they significantly compensate each other. The particular advantage of the compensation is that the unavoidable discontinuity phases occurring during each carriage retardation are utilized for compensation of the fluctuations of the driving torque. CLAIMS
1. A sheet delivery apparatus for use with a sheet-processing machine, comprising a sheet delivery station, a conveyor displaceable along a path having an arcuate portion in the region of the sheet delivery station, means defining a sheet gripper carriage path having an arcuate portion concentric with the arcuate portion of the conveyor path, a plurality of sheet gripper carriages displaceable along the sheet gripper carriage path, and a plurality of coupling means each coupling a respective sheet gripper carriage to a respective portion of the conveyor for displacement of the sheet gripper carriages on advancement of the conveyor, said conveyor portions being at a spacing from one another which is equal to the length of the arcuate portion of the conveyor path.
2. An apparatus as claimed in claim 1, wherein the conveyor comprises a chain.
3. An apparatus as claimed in either claim 1 or claim 2, wherein the coupling means each comprise a rod member.
4. An apparatus as claimed in any one of the preceding claims, comprising a wheel defining the arcuate portion of the conveyor path.
5. An apparatus as claimed in any one of the preceding claims, so arranged that the coupling means extend tangentially to the arcuate portion of the sheet gripper carriage path during displacement of the sheet gripper carriages along the arcuate portion of the sheet gripper carriage path.
6. A sheet delivery apparatus substantially as hereinbefore described with reference to the accompanying drawings.
GB7938699A 1978-11-08 1979-11-08 Sheet delivery apparatus Expired GB2036699B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD20895178A DD140134A1 (en) 1978-11-08 1978-11-08 BOW MACHINERY FOR ARC-MACHINING MACHINES, ESPECIALLY PRINTING MACHINES

Publications (2)

Publication Number Publication Date
GB2036699A true GB2036699A (en) 1980-07-02
GB2036699B GB2036699B (en) 1982-12-22

Family

ID=5515220

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7938699A Expired GB2036699B (en) 1978-11-08 1979-11-08 Sheet delivery apparatus

Country Status (5)

Country Link
DD (1) DD140134A1 (en)
DE (1) DE2944167A1 (en)
GB (1) GB2036699B (en)
SE (1) SE7909215L (en)
SU (1) SU1054258A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766099A (en) * 1985-05-14 1988-08-23 Institut Francaise Du Petrole Catalyst for oil hydrorefining or mild hydrocracking of heavy oil charges to produce middle distillates

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD216219A1 (en) * 1983-06-30 1986-03-12 Polygraph Leipzig BOW MACHINERY FOR BOW-MACHINING MACHINES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766099A (en) * 1985-05-14 1988-08-23 Institut Francaise Du Petrole Catalyst for oil hydrorefining or mild hydrocracking of heavy oil charges to produce middle distillates

Also Published As

Publication number Publication date
GB2036699B (en) 1982-12-22
SU1054258A1 (en) 1983-11-15
DD140134A1 (en) 1980-02-13
SE7909215L (en) 1980-05-09
DE2944167A1 (en) 1980-05-22

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PCNP Patent ceased through non-payment of renewal fee