EP0442723A1 - Appareil pour faire se chevaucher les pièces d'une pile de tissu - Google Patents

Appareil pour faire se chevaucher les pièces d'une pile de tissu Download PDF

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Publication number
EP0442723A1
EP0442723A1 EP91301165A EP91301165A EP0442723A1 EP 0442723 A1 EP0442723 A1 EP 0442723A1 EP 91301165 A EP91301165 A EP 91301165A EP 91301165 A EP91301165 A EP 91301165A EP 0442723 A1 EP0442723 A1 EP 0442723A1
Authority
EP
European Patent Office
Prior art keywords
stack
conveyor
workpieces
roller
holding
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
EP91301165A
Other languages
German (de)
English (en)
Other versions
EP0442723B1 (fr
Inventor
Hubert Blessing
Ted M. Ray
Lawrence Wafford, Jr.
Lennart E. Lindstedt
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.)
Levi Strauss and Co
Original Assignee
Levi Strauss and Co
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 Levi Strauss and Co filed Critical Levi Strauss and Co
Publication of EP0442723A1 publication Critical patent/EP0442723A1/fr
Application granted granted Critical
Publication of EP0442723B1 publication Critical patent/EP0442723B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65H29/66—Advancing articles in overlapping streams
    • B65H29/6654—Advancing articles in overlapping streams changing the overlapping figure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/60—Loosening articles in piles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance

Definitions

  • This invention relates generally to the handling of flexible planar objects, and more particularly to the shingling of such objects when presented in stack form.
  • a workpiece stack can be created by repeatedly folding a piece of fabric onto itself and then cutting a single pattern clear through all layers of the multiple-folded cloth. This produces a stack comprised of flexible planar objects of uniform size, oriented such that all edges of each object are juxtaposed with the corresponding edges of each immediately adjacent object. This arrangement produces a stack with ends defined by the two outermost planar objects, and sides defined by the juxtaposed edges of the several juxtaposed objects, which sides are all approximately perpendicular to the two parallel planes containing the end members of the stack.
  • the foregoing and additional objectives are accomplished to shingle a stack of the type previously described.
  • the present invention subjects the stack to a two-part process.
  • the first step in the process forms an initial shingle and the second step further decreases the amount of overlap between adjacent workpieces.
  • each workpiece is exposed as each underlying workpiece is displaced relative to its immediate neighbor during the shingling process.
  • the stack is first placed on the platform of the rough shingler assembly.
  • a clamp or similar means, is applied to the stack, preferably nearer to one end, such that the workpieces are immobilized relative to one another within a region near the clamp.
  • the rough shingler then bends the stack.
  • each workpiece shifts laterally relative to adjacent workpieces at the end of the stack past the bend and opposite the clamp.
  • the clamp prevents any such shift or displacement within the region of the stack to which it is applied.
  • the other end of the stack is clamped. The first clamp is released and the stack is then unbent. The initial displacement has been carried through the entire stack.
  • This process may be repeated indefinitely, so long as the top workpiece in the stack continues to overlap the bottom workpiece and both clamps firmly hold both top and bottom workpieces. The longer the workpieces relative to the distance between the clamps and the thickness of the stack the more the stack can be shingled.
  • the rough shingled stack is next treated by a spreader assembly.
  • the spreader assembly includes at least one roller subassembly positioned above a conveyor belt on which the partially shingled stack is riding.
  • the axle of the roller subassembly lies in a plane parallel to the conveyor and at an angle perpendicular to the direction of the conveyor belt.
  • the stack is positioned upon the conveyor so that its open side faces the roller subassemblies and the direction of the conveyor. In the open side of a shingled stack each underlapping workpiece is exposed. In the closed side, each underlapping workpiece is hidden.
  • a preshingled stack is driven under a roller subassembly or series of subassemblies.
  • the subassembly is lowered so that the rollers of the subassembly are brought into contact with the open side of the stack.
  • the rollers operate to recline and further shingle the stack. They do so by a combination of roller rotation in the same direction as the direction of the stack in combination with the application of pressure onto the shingled stack.
  • Figure 1 illustrates one arrangement of the preferred embodiment. This arrangement demonstrates a close spacial proximity that is appropriate for rough shingler assembly 100 and spreader assembly 200, in view of the close temporal proximity in which the two assemblies operate during the particular shingling process disclosed herein, as well as in the overall manufacturing process.
  • a fabric workpiece stack is placed upon rough shingler platform 110.
  • the rough shingler platform 110 comprises two adjoining subplates, primary subplate 112 and secondary subplate 114.
  • the axis 116 of the platform 110 joins the two subplates 112 and 114.
  • a primary clamp 118 is positioned to clamp a stack 122 of objects against the primary subplate 112 and a secondary clamp 120 is positioned to clamp the same stack 122 against the secondary subplate 114.
  • the sides of the stack which will be offset in a shingled fashion are preferably parallel to the axis 116.
  • Figures 2A through 2F show the sequence of steps taken by the rough shingler 100.
  • Figure 2A shows that a workpiece stack has been delivered to the platform 110. This may be done through any standard means such as by a conveyor.
  • the stack 120 straddles the axis 116 and is positioned under both primary clamp 118 and secondary clamp 120.
  • the primary clamp 118 is activated to firmly grasp the stack 122.
  • the activation of the clamps may be controlled by mechanical, pneumatic, hydraulic or other means and is preferably automatically controlled. This action holds the workpieces in the stack immobile relative to one another in the region near to the primary clamp 118.
  • the secondary subplate 114 is rotated about the axis 116 bending the workpieces.
  • the subplate 114 may be controlled by mechanical, pneumatic, hydraulic or other means. These control means are preferably automatically actuated in sequence with the clamps. Any suitable control means may be used.
  • Each workpiece is bent around the axis 116. However, each workpiece that is successively farther from the platform 110 is bent through an arc having a larger radius of curvature. Accordingly, because each workpiece is the same length the ends of the stack positioned over the secondary subplate 114 are displaced from one another. The larger the angle that the secondary subplate rotates through, the larger the displacement of the ends of the stack 122.
  • the ends will be displaced whether the secondary subplate 114 is rotated upward or downward (as shown). It should be noted that if the subplate 114 is rotated upward the open end of the stack will be at the opposite end of the stack. Depending upon the characteristics of the workpiece attempting to rotate the subplate 114 up may tend to buckle the fabric and fail to shingle the stack 122.
  • Figure 2D shows that the secondary clamp 120 is activated to firmly grasp the stack 122. This action holds the workpieces in the stack immobile relative to one another in the region near to the secondary clamp 120.
  • Figure 2E shows that the primary clamp 118 is deactivated. The workpieces are no longer immobile relative to one another over the primary subplate 112.
  • Figure 2F secondary subplate 114 is returned to its starting position parallel to primary subplate 112. Because the workpieces are no longer bent through various radii of curvature the amount displacement between the ends of the stack 122 held by the secondary clamp 120 is transferred throughout the stack 122.
  • Additional displacement of the workpieces may be obtained by repeating that part of the process described above, so long as previous displacement has not removed any workpieces from the areas subject to detachable affixation by clamps 118 and 120 and so long as the top workpiece still overlies at least in part the bottom workpiece.
  • the rough shingling operation may not be able to achieve sufficient shingling for suitable handling in subsequent operations.
  • the spreader assembly 200 is used to spread the shingled stack out even more.
  • the rough shingled stack is transported from the rough shingler 100 to the spreader assembly 200.
  • the stack may be transported by any known method such as a conveyor.
  • the spreader assembly 200 shown in Figure 3 comprises a conveyor 210 which transports the stack 122 therethrough. Additionally, roller assemblies 220 are utilized to spread out the fabric.
  • the roller assemblies include a roller 222 driven by a belt 224 in the direction of the conveyor 210 and supported by a moveable arm 226. Positive pressure is exerted against the conveyor 210 by the roller 222 through an air cylinder 228. Springs, weight or other means may be used.
  • the open edge of the stack 122 is driven under the roller 222 by the conveyor 210.
  • the stack 122 forces the roller 222 to rise up and ride along the stack 122. Because the workpieces are compressible, a small wave is developed due to the pressure of the roller 222 on the stack 122. This wave is pushed through the stack thereby increasing the amount of shingling (spreading out the stack 122).
  • the size of the rollers 222 are preferably selected to have an appropriate angle of attack to the stack 122 based upon the amount of shingle expected. Thus, rollers of different sizes can be used throughout a single shingle spreader assembly as shown in Figure 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Pile Receivers (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP91301165A 1990-02-13 1991-02-13 Appareil pour faire se chevaucher les pièces d'une pile de tissu Expired - Lifetime EP0442723B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47947290A 1990-02-13 1990-02-13
US479472 1990-02-13

Publications (2)

Publication Number Publication Date
EP0442723A1 true EP0442723A1 (fr) 1991-08-21
EP0442723B1 EP0442723B1 (fr) 1995-07-26

Family

ID=23904157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91301165A Expired - Lifetime EP0442723B1 (fr) 1990-02-13 1991-02-13 Appareil pour faire se chevaucher les pièces d'une pile de tissu

Country Status (5)

Country Link
EP (1) EP0442723B1 (fr)
JP (1) JP2603570B2 (fr)
AT (1) ATE125514T1 (fr)
CA (1) CA2036146C (fr)
DE (1) DE69111484T2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107915089A (zh) * 2018-01-05 2018-04-17 海宁市力天袜业有限公司 一种制袜用布料展铺机
CN108517677A (zh) * 2018-02-28 2018-09-11 海宁市现代汽车座套有限公司 一种车用遮光防晒罩生产裁切设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110438789B (zh) * 2019-08-05 2021-11-05 张刚 一种用于布艺加工的高精度裁布机
CN112048898B (zh) * 2020-09-18 2022-03-22 宇诚信用评价咨询(湖北)有限公司 一种纺织用纺织材料断切装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008890A (en) * 1975-01-29 1977-02-22 Vanguard Machinery Corporation Method and apparatus for transporting materials
GB2061235A (en) * 1979-10-23 1981-05-13 Grapha Holding Ag Conveying and diverting device for a stream of overlapping printed sheets
EP0075121A1 (fr) * 1981-09-18 1983-03-30 Ferag AG Dispositif pour étirer des produits plats délivrés en formation imbriquée, en particulier des produits imprimés
US4727784A (en) * 1986-05-20 1988-03-01 Bernal Rotary Systems, Inc. Web cut blank piling method and apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS534231B2 (fr) * 1972-04-24 1978-02-15
US4214744A (en) * 1978-06-08 1980-07-29 Molins Machine Company, Inc. Snubbing apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008890A (en) * 1975-01-29 1977-02-22 Vanguard Machinery Corporation Method and apparatus for transporting materials
GB2061235A (en) * 1979-10-23 1981-05-13 Grapha Holding Ag Conveying and diverting device for a stream of overlapping printed sheets
EP0075121A1 (fr) * 1981-09-18 1983-03-30 Ferag AG Dispositif pour étirer des produits plats délivrés en formation imbriquée, en particulier des produits imprimés
US4727784A (en) * 1986-05-20 1988-03-01 Bernal Rotary Systems, Inc. Web cut blank piling method and apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107915089A (zh) * 2018-01-05 2018-04-17 海宁市力天袜业有限公司 一种制袜用布料展铺机
CN108517677A (zh) * 2018-02-28 2018-09-11 海宁市现代汽车座套有限公司 一种车用遮光防晒罩生产裁切设备

Also Published As

Publication number Publication date
CA2036146C (fr) 1994-11-15
EP0442723B1 (fr) 1995-07-26
DE69111484T2 (de) 1996-03-07
JPH07304531A (ja) 1995-11-21
JP2603570B2 (ja) 1997-04-23
DE69111484D1 (de) 1995-08-31
ATE125514T1 (de) 1995-08-15

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