EP2921269B1 - Blockspannvorrichtung und stammsäge mit einer solchen spannvorrichtung - Google Patents

Blockspannvorrichtung und stammsäge mit einer solchen spannvorrichtung Download PDF

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Publication number
EP2921269B1
EP2921269B1 EP14425031.3A EP14425031A EP2921269B1 EP 2921269 B1 EP2921269 B1 EP 2921269B1 EP 14425031 A EP14425031 A EP 14425031A EP 2921269 B1 EP2921269 B1 EP 2921269B1
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EP
European Patent Office
Prior art keywords
clamping device
base plate
clamps
log
arm
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.)
Active
Application number
EP14425031.3A
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English (en)
French (fr)
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EP2921269A1 (de
Inventor
Giovanni Bertoli Barsotti
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.)
Universal Tissue Technology Srl
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Universal Tissue Technology Srl
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.)
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Publication date
Application filed by Universal Tissue Technology Srl filed Critical Universal Tissue Technology Srl
Priority to ES14425031.3T priority Critical patent/ES2634017T3/es
Priority to EP14425031.3A priority patent/EP2921269B1/de
Priority to PL14425031T priority patent/PL2921269T3/pl
Publication of EP2921269A1 publication Critical patent/EP2921269A1/de
Application granted granted Critical
Publication of EP2921269B1 publication Critical patent/EP2921269B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/11—Machines or methods used for cutting special materials for cutting web rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely

Definitions

  • the present disclosure generally relates to a log clamping device, and more particularly to a log clamping device associated with a cutting machine.
  • the cutting machine is applied to cut "logs" comprising web material wound on tubular winding cores.
  • the log clamping device clamps the log in the cutting process.
  • the disclosure also relates to a log saw comprising a clamping device.
  • a log such as a wound tissue log is cut into rolls of smaller size by a blade or knife, e.g. a rotating circular knife, in a cutting machine.
  • the log is held and supported by a clamping device in the cutting process.
  • a typical clamping device is configured for securing logs of constant size.
  • Related structures of prior clamping devices may need to be replaced when the size of the logs is changed in order to properly clamp, making it inconvenient or inefficient to change log diameters. Therefore, there is a need for more efficient or flexible clamping systems for cutting logs.
  • GB-A-547 112 describes a device according to the preamble of claim 1.
  • the invention is defined in claim 1.
  • the clamping device can further be comprised of at least one post.
  • the base plate can be moveably connected to the at least one post.
  • the post can be in the form of a screw, and the base plate can be threadedly engaged with the at least one post.
  • the base plate moves relative to the frame via the rotation of the at least one post.
  • the clamping device can comprise a pair of arms moveably disposed on the base plate.
  • the pair of clamps can be connected to the pair of the arms respectively.
  • a follower can be rotatably formed or mounted on each arm.
  • a profile can be fixed on the frame corresponding to the follower. The profile has a surface on which the follower moves along to change the distance between the arms.
  • the follower on one arm and a corresponding profile are symmetrical with respect to the follower on another arm and another corresponding profile relative to a vertical plane parallel to the longitudinal axis of the log and passing through a central region of the clamping device.
  • one clamp is fixed onto one arm, and another clamp is pivotably connected to another arm.
  • the another clamp can be capable of rotating between a clamping position and an open position, to facilitate advancing of the log through the clamping device during the cutting process.
  • An arm actuator can be connected to each arm for changing the distance between the arms.
  • the invention concerns a log cutting machine comprising a log advancing conveyor, a log cutting knife and a log clamping device as disclosed herein.
  • a clamping device 1 in accordance with an exemplary embodiment of the present disclosure is shown for holding and supporting a circumferential surface 101 of a log 100 in a cutting process, in which the log 100 is cut by a cutting machine into rolls of smaller sizes.
  • the log 100 can be a tissue log or other kinds of web material wound on a tubular winding core 102.
  • the cutting machine also named log saw machine, is comprised of a log advancing conveyor and a log cutting knife, which can be e.g. a circular rotating knife. These components of the log saw are well known to those skilled in the art and are not described in greater detail herein.
  • the clamping device shown in FIG. 2 has two clamping units 2 and 3 for holding two lanes of logs 100.
  • the two clamping units 2 and 3 have similar structures.
  • the clamping device may have one clamping unit for holding a single log 100, or may be provided with more than two clamping units for holding more than two logs 100.
  • the clamping device having one clamping unit is set forth as an example for a detailed description as follows.
  • the clamping device comprises a frame 10, a supporting beam 11 fixed on the frame 10, a base plate 12, a pair of arms 131, 132 disposed on the base plate 12 and a pair of clamps 141, 142 respectively connected to the arms 131, 132.
  • the clamp 141 is fixed on the arm 131.
  • the clamp 142 is pivotably connected to the arm 132, and is capable of rotating and shifting between a clamping position and an open position.
  • the log 100 is supported on the supporting beam 11. As shown in FIG.
  • the supporting beam 11 when the clamp 142 is in the clamping position, the supporting beam 11 locates at a bottom of the circumferential surface 101 of the log 100 and the clamps 141, 142 are symmetrically located at opposite sides of the circumferential surface 101 of the log 100.
  • the supporting beam 11 and the clamps 141, 142 cooperate to secure the log 100 for facilitating the cutting process of the log 100.
  • the clamp 142 When the clamp 142 is in the open position (dotted lines shown in FIG. 2 ), the log 100 will be unrestrained among the supporting beam 11 and the clamps 141, 142.
  • the supporting beam 11, in typical embodiments, does not move vertically when the base plate 12 moves vertically, but remains at a substantially constant elevation to support logs.
  • the minor distance d between the clamps 141, 142 increases allowing the log 100 to move between the clamps 141, 142 more easily to allow new regions of the log 100 to be cut.
  • Multiple pairs of arms and clamps can be arranged along the axial direction of the log 100 as desired.
  • Two clamps 142a, 142b are shown in FIG. 1 and are distributed along the axial direction of the log 100. Accordingly, the supporting beam 11 can extend to a predetermined length along the axial direction of the log 100 for holding the log 100.
  • the clamps 141, 142 may have a curved shape in some embodiments.
  • the clamps 141, 142 can be configured to include sub-clamps for increasing a contacting surface between the clamps 141, 142 and the log 100.
  • the clamps 142a, 142b shown in FIG. 1 each have two sub-clamps 145 and in some embodiments may present a U shape or other suitable shapes.
  • the distance between the sub-clamps 145 of the clamp 142a is smaller than that of the clamp 142b.
  • the clamp 141 can have a similar structure to the clamp 142, but need not similar but may have any suitable shape known in the art.
  • the arms 131, 132 can each include sub-arms for connecting a corresponding sub-clamp 145.
  • the clamp 142 is connected to an actuator 15.
  • the actuator 15 drives the rotation of the clamp 142 relative to the arm 132 between the clamping position and the open position.
  • the actuator 15 is positioned beneath the base plate 12, and penetrates through the base plate 12 to connect the clamp 142.
  • the actuator 15 can be a pneumatic cylinder, a hydraulic cylinder or other equivalent structures.
  • a motor 150 is used to move a pusher (shown behind the right-hand log in Figs. 2 , 4 and 5 ) that moves the log 100 into position to be clamped and moves the log 100 away from the clamps 141, 142 after cutting is completed.
  • the supporting beam 11 extends upwardly from the frame 10 and comprises two troughs 111, 112.
  • the section profile of the supporting beam 11, including the respective troughs, is substantially a Y shape or a V shape, though other shapes may be contemplated such as a more curved, less angular shape capable of holding the log 100.
  • the troughs 111, 112 contact and help support the bottom of the circumferential surface 101 of the log 100.
  • An advancing conveyor e.g. an endless belt or chain, can be guided in the beam 11.
  • Log pushers can be connected to the advancing conveyor, for pushing the logs in an advancing direction through the log saw or log cutting machine.
  • Figs. 2 , 4 and 5 the log pushers are shown behind the right-hand log, while the pushers are omitted from the left-hand log.
  • the logs slide, under the thrust of the pushers, on the surfaces of the troughs 111, 112.
  • the clamping device may further comprise a cam mechanism corresponding to each arm 131(132).
  • the cam mechanism comprises a profile 16 fixed on the frame 10, and a follower 17 disposed on the arm 131(132) to match with the profile 16.
  • the profiles 16 for the two cam mechanisms corresponding to the arms 131, 132 may be symmetrical relative to the center of the two clamping units 2, 3, as shown in FIG. 2 and FIG. 4 , or, in other words, can be mirror images of one another reflected about a vertical plane parallel to the axis of the logs and normal to the plane of FIG. 2 , passing through a central region of the clamping device.
  • the profile 16 shown in the embodiment has a bottom end near the base plate 12 and an opposite top end far from the base plate 12.
  • the profile 16 as depicted has a surface 161 matching with the follower 17, and gradually slant from the bottom end to the top end thereof.
  • the distance between the two profiles 16 increases gradually from the bottom ends to the top ends thereof.
  • the follower 17 moves along the surface 161 of the corresponding profile 16
  • the distance between the two arms 131, 132 is changed gradually. More specifically, when the follower 17 moves upwardly along the surface 161 from the bottom end to the top end of the profile 16, the distance between the arms 131, 132 is increased gradually.
  • the follower 17 moves downwardly along the surface 161 from the top end to the bottom end of the profile 16, the distance between the arms 131, 132 is decreased gradually.
  • the base plate 12 is moveably connected to at least one post 18.
  • FIG. 2 shows two posts 18 connecting the base plate 12.
  • the posts 18 are depicted as screws, and the base plate 12 is threadedly engaged with the posts 18, though other mechanisms may be used for moving the base plate 12.
  • the posts 18 as shown can be rotated by a motor 19, and the base plate 12 is moved along the posts 18.
  • the motor 19 can be fixed on the frame 10.
  • the arms 131, 132 are moveably connected to the base plate 12.
  • the arms 131, 132 can be slidably disposed on the base plate 12.
  • rails 121 and tracks 122 are formed between the arms 131, 132 and the base plate 12 to accomplish the slidable movement between the arms 131, 132 and the base plate 12.
  • the follower 17 is rotatably arranged on the arm 131, 132 and engages with the surface 161 of the profile 16 fixed on the frame 10. Through the motion of the follower 17, the arm 131, 132 can slide on the base plate 12, and the distance between the clamps 141, 142 (as well as that between the arms 131, 132) can be changed. The follower 17 can also be controlled to stop at a desired position to maintain a fixed distance between the arms 131, 132. In alternate embodiments, the follower 17 can be driven directly by a motor (not shown) or other power supply or other device such as an airbag or pneumatic cylinder (not shown).
  • the distance between the clamps 141, 142 and the supporting beam 11 i.e., the vertical position of the clamps 141, 142, the arms 131, 132, and the base plate 12
  • the arms 131, 132 can slide on the base plate 12 and the distance between the arms 131, 132 (i.e., the horizontal position of the arms 131, 132 and the clamps 141, 142) can be adjusted.
  • the supporting beam 11 and the clamps 141, 142 can be adjusted to hold and support logs 100 with different diameter, and there is no need to replace relative parts of the clamping device, which is more convenient and rapid in production.
  • the operation principles of the clamping device provided in the present disclosure will be more detailed described as follows referring to FIG 3 and FIG 4 .
  • the logs 200 shown in FIG 3 and FIG. 4 have a larger diameter than the logs 100 shown in FIG. 1 and FIG. 2 .
  • the clamping device as shown in FIG. 1 and FIG. 2 needs to hold and support the logs 200 as shown in FIG. 3 and FIG. 4 , the posts 18 rotate, and the base plate 12 moves upwardly to increase the distance between the supporting beam 11 and the clamps 141, 142; at the same time, the follower 17 rotates and moves upwardly along the surface 161 of the profile 16, and the arms 131, 132 slide on the base plate 12, whereby the distance between the arms 131, 132 and between the clamps 141, 142 is increased.
  • the log 200 can be inserted among the supporting beam 11 and the clamps 141, 142.
  • the log 200 is then secured by the supporting beam 11 and the clamps 141, 142 after a reversed rotation of the clamp 142, where the clamp 142 is in the clamping position.
  • each arm 131, 132 is connected to an arm actuator 20.
  • the arm actuator 20 may be an electric, pneumatic, or hydraulic actuator, and may comprise an electric motor.
  • the horizontal positions of the arms 131, 132 on the base plate 12 can be changed by the driving of the arm actuator 20. In other words, the distance between the arms 131, 132 can be adjusted by the driving of the arm actuator 20. In such way, the horizontal positions of the arms 131, 132 and the vertical positions of the arms 131, 132 can be controlled independently.
  • the arm actuator 20 can be a rack and pinion system formed between the arms 131, 132 and the base plate 12.
  • the moveable connection between the base plate 12 and the post 18 is not limited to screws.
  • Other systems such as linear actuators, or rack and pinion can also be formed between the base plate 12 and the post 18 to accomplish the vertical position adjustment of the base plate 12.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Jigs For Machine Tools (AREA)

Claims (16)

  1. Eine Klemmvorrichtung zum Klemmen eines Blocks, wobei die Klemmvorrichtung umfasst:
    einen Rahmen (10);
    einen Tragholm (11), der auf dem Rahmen zum Unterstützen des Blocks (100, 200) befestigt ist;
    ein Paar Klemmen (141, 142) zum Klemmen des Blocks; und
    eine Basisplatte (12) zum Tragen des Paars Klemmen (141, 142), wobei das Paar Klemmen auf der Basisplatte (12) bewegbar angeordnet ist, um den Abstand zwischen den Klemmen (141, 142) zu verändern, dadurch gekennzeichnet, dass
    die Basisplatte (12) auf dem Rahmen (10) bewegbar angeordnet ist, um den Abstand zwischen den Klemmen (141, 142) und dem Tragholm (11) zu verändern, wodurch sie es gestattet, dass die Klemmvorrichtung geeignet ist, um Holzklötze verschiedener Durchmesser zu klemmen.
  2. Die Klemmvorrichtung gemäß Patentanspruch 1, weiterhin aufweisend mindestens einen Pfosten (18), wobei die Basisplatte (12) bewegbar mit dem mindestens einen Pfosten verbunden ist.
  3. Die Klemmvorrichtung gemäß Patentanspruch 2, wobei der mindestens eine Pfosten (18) eine Schraube ist, während die Basisplatte (12) mit dem mindestens einen Pfosten (18) mittels Gewinde in Eingriff steht und die Basisplatte (12) sich relativ zum Rahmen (10) über die Drehung des mindestens einen Pfostens (18) bewegt.
  4. Die Klemmvorrichtung gemäß Patentanspruch 1 oder 2, weiterhin umfassend ein Paar Arme (131, 132), die auf der Basisplatte (12) bewegbar angeordnet sind, wobei das Paar Klemmen (141, 142) mit dem Paar Armen (131, 132) entsprechend verbunden ist.
  5. Die Klemmvorrichtung gemäß Patentanspruch 4, wobei ein Folger (17) drehbar auf jedem Arm (131, 132) gebildet ist, während ein Profil (16) auf dem Rahmen (10) befestigt ist, das dem Folger (17) entspricht, wobei das Profil (16) eine Oberfläche (161) aufweist, auf der der Folger (17) sich entlangbewegt, um den Abstand zwischen den Armen (131, 132) zu verändern.
  6. Die Klemmvorrichtung gemäß Patentanspruch 5, wobei der Folger (17) auf einem Arm (131) und ein entsprechendes Profil (16) symmetrisch sind bezogen auf den Folger (17) auf einem anderen Arm (132) und ein anderes entsprechendes Profil (16) relativ zu einer vertikale Ebene parallel zur Längsachse des Blocks und verlaufend durch eine mittige Region der Klemmvorrichtung.
  7. Die Klemmvorrichtung gemäß Patentanspruch 4 oder 5 oder 6, wobei eine Klemme (141) auf einem Arm (131) befestigt ist und eine andere Klemme (142) ist schwenkbar mit einem anderen Arm (132) verbunden, und wobei die andere Klemme (142) in der Lage ist zwischen einer Klemmposition und einer offenen Position zu drehen.
  8. Die Klemmvorrichtung gemäß einem der Patentansprüche 4 bis 7, wobei ein Arm-Stellglied (20) mit jedem Arm (131, 132) verbunden ist, um den Abstand zwischen den Armen (131, 132) zu verändern.
  9. Die Klemmvorrichtung gemäß Patentanspruch 4, wobei eine Schiene (121) und eine Spur (122) zwischen dem Arm (131, 132) und der Basisplatte (12) gebildet sind, um eine verschiebbare Bewegung zwischen dem Arm (131, 132) und der Basisplatte (12) bereitzustellen.
  10. Die Klemmvorrichtung gemäß Patentanspruch 9, wobei ein Folger (17) auf jedem Arm (131, 132) angeordnet ist, während ein Profil (16) auf dem Rahmen (10) befestigt ist, das dem Folger (17) entspricht, wobei das Profil (16) eine Oberfläche (161) aufweist, auf der sich der Folger (17) entlangbewegt, um die Position des Arms (131, 132) auf der Basisplatte (12) zu verändern, wodurch die Position einer entsprechenden Klemme (141, 142) auf der Basisplatte (12) verändert wird.
  11. Die Klemmvorrichtung gemäß Patentanspruch 9 oder 10, wobei ein Arm-Stellglied (20) mit jedem Arm (131, 132) verbunden ist, um die horizontale Position des Arms (131, 132) auf der Basisplatte (12) zu verändern.
  12. Die Klemmvorrichtung gemäß einem der Patentansprüche 4, 9 bis 11, wobei eine Klemme (141) des Paars von Klemmen (141, 142) auf einem Arm (131) des Paars von Armen (131, 132) befestigt ist und eine andere Klemme (142) des Paars von Klemmen (141, 142) ist schwenkbar mit einem anderen Arm (132) des Paars von Armen (131, 132) verbunden und in der Lage, sich zwischen einer Klemmposition und einer offenen Position zu drehen.
  13. Die Klemmvorrichtung gemäß Patentanspruch 12, weiterhin aufweisend ein Stellglied (15), das die andere Klemme (142) des Paars von Klemmen (141, 142) verbindet, wobei das Stellglied (15) die andere Klemme (142) des Paars von Klemmen (141, 142) antreibt, um die Drehung der anderen Klemme des Paars von Klemmen zwischen der Klemmposition und der offenen Position anzutreiben.
  14. Die Klemmvorrichtung gemäß Patentanspruch 13, wobei das Stellglied (15) unterhalb der Basisplatte (12) angeordnet ist und sich durch die Basisplatte (12) erstreckt, um die andere Klemme (142) des mindestens einen Paars Klemmen (141, 142) zu verbinden.
  15. Die Klemmvorrichtung gemäß einem der Patentansprüche 4, 9 bis 13, wobei der mindestens eine Pfosten (18) eine Schraube ist, während die Basisplatte (12) mit dem mindestens einen Pfosten (18) mittels Gewinde in Eingriff steht und die Basisplatte (12) bewegt sich relativ zum Rahmen (10) über die Drehung des mindestens einen Pfostens (18), um die vertikale Position der Basisplatte (12) zu verändern, wodurch die vertikale Position des Paars Klemmen (141, 142) verändert wird; wobei ein Motor (19) vorzugsweise bereitgestellt ist zum Antreiben des mindestens einen Pfostens (18), und wobei der Motor (19) vorzugsweise auf dem Rahmen (10) befestigt ist.
  16. Eine Blockschneidmaschine, umfassend einen Block-Vorschubförderer, ein Block-Schneidmesser und eine Block-Klemmvorrichtung gemäß einem der vorhergehenden Patentansprüche.
EP14425031.3A 2014-03-19 2014-03-19 Blockspannvorrichtung und stammsäge mit einer solchen spannvorrichtung Active EP2921269B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES14425031.3T ES2634017T3 (es) 2014-03-19 2014-03-19 Dispositivo de sujeción de rodillos y sierra de rodillos que comprende dicho dispositivo
EP14425031.3A EP2921269B1 (de) 2014-03-19 2014-03-19 Blockspannvorrichtung und stammsäge mit einer solchen spannvorrichtung
PL14425031T PL2921269T3 (pl) 2014-03-19 2014-03-19 Urządzenie do mocowania beli i maszyna do cięcia beli zawierająca urządzenie do mocowania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14425031.3A EP2921269B1 (de) 2014-03-19 2014-03-19 Blockspannvorrichtung und stammsäge mit einer solchen spannvorrichtung

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Publication Number Publication Date
EP2921269A1 EP2921269A1 (de) 2015-09-23
EP2921269B1 true EP2921269B1 (de) 2017-05-10

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ES (1) ES2634017T3 (de)
PL (1) PL2921269T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109109059A (zh) * 2017-06-25 2019-01-01 周尧 一种无屑切割机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI598198B (zh) * 2015-06-18 2017-09-11 全利機械股份有限公司 卷筒裁切機之管狀夾持系統
CN107263147A (zh) * 2017-06-16 2017-10-20 无锡振华机械有限公司 可自动下料的杆/管状工件夹具

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GB547112A (en) * 1940-08-03 1942-08-13 Linde Air Prod Co Improvements in pressure butt-welding of hollow metal members
AT397224B (de) * 1991-05-14 1994-02-25 Wolf Systembau Gmbh & Co Kg Verfahren und vorrichtung zum herstellen von vierkantern aus baumstämmen od. dgl.
US6699113B2 (en) * 2001-10-12 2004-03-02 Arobotech Systems, Inc. Steady rest with vertical adjustment
CA2673269A1 (en) * 2009-04-09 2010-10-09 Ipex Inc. Support for tubing and method of using same
ITFI20120155A1 (it) * 2012-07-27 2014-01-28 Perini Fabio Spa "dispositivo per trattenere un prodotto allungato da tagliare e macchina troncatrice comprendente detto dispositivo"

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109109059A (zh) * 2017-06-25 2019-01-01 周尧 一种无屑切割机

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ES2634017T3 (es) 2017-09-26
EP2921269A1 (de) 2015-09-23
PL2921269T3 (pl) 2017-10-31

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