EP0531523A1 - Verriegelungsvorrichtung für eine transfereinrichtung - Google Patents

Verriegelungsvorrichtung für eine transfereinrichtung Download PDF

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Publication number
EP0531523A1
EP0531523A1 EP90907478A EP90907478A EP0531523A1 EP 0531523 A1 EP0531523 A1 EP 0531523A1 EP 90907478 A EP90907478 A EP 90907478A EP 90907478 A EP90907478 A EP 90907478A EP 0531523 A1 EP0531523 A1 EP 0531523A1
Authority
EP
European Patent Office
Prior art keywords
engaging
locking
transfer
locking device
main body
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
EP90907478A
Other languages
English (en)
French (fr)
Other versions
EP0531523A4 (en
EP0531523B1 (de
Inventor
Yuji 48 Obishi-Machi Hirota
Toshihiro 118 Shima-Machi O Tanaka
Nobuyuki 3-72 Nishikarumi-Machi Kaji
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.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Publication of EP0531523A1 publication Critical patent/EP0531523A1/de
Publication of EP0531523A4 publication Critical patent/EP0531523A4/en
Application granted granted Critical
Publication of EP0531523B1 publication Critical patent/EP0531523B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/055—Devices comprising a pair of longitudinally and laterally movable parallel transfer bars

Definitions

  • the present invention relates to a locking device for a transfer feeder employed in a transfer press.
  • a transfer feeder employed in the conventional transfer press is constructed to have a pair of transfer bars which are movable in two-dimensional or three-dimensional directions, and to clamp a work by means of a finger provided in opposition to these transfer bars for transporting the work.
  • the transfer bars are adapted to be driven in feeding direction, lifting direction and clamping direction by means of a cam driven to rotate by a driving force taken-off by a power take off of the transfer press.
  • a clutch, a brake and so forth are provided in the power take off for controlling transmission and blocking of the driving power.
  • the present invention is to solve the above-mentioned problems. Therefore, it is an object of the present invention to provide a locking device for a transfer feeder which can certainly lock transfer bars at desired positions so that the transfer bars and their driving portions will never initiate motion unexpectedly.
  • a locking device for a transfer feeder of a transfer press which transfer feeder includes a pair of transfer bars driven in two or three dimensional directions, which comprises engaging means provided in a drive mechanism of the transfer bar, locking means provided at a plurality of stationary portions of a press main body for engaging with the engaging means, and driving means for driving the locking means.
  • the engaging means comprises a plurality of engaging plates fixed on a feed carrier and equalizer bar provided in lift/clamping mechanism and having a plurality of engaging holes formed in alignment in the longitudinal direction with a regular interval
  • the locking means comprises a plurality of locking pins provided at plurality of portions of the press main body respectively in opposition to the engaging plates and movable in axial and lateral directions by means of the driving means to engage with one of a plurality of the engaging holes.
  • each of the engaging plates has dogs at predetermined positions corresponding to each engaging holes, and engagement and release of the locking pin relative to the engaging holes is controlled by detecting one of the dogs by means of a detector.
  • the engaging means comprises a engaging plate secured on the press main body in upright fashion and having a plurality of engaging holes formed in alignment in a feed direction of a feed carrier with a regular interval, an engaging portion having a plurality of recessed grooves formed in the a clamping drive lever in alignment in the longitudinal direction thereof with a regular interval and an engaging portion having a plurality of recessed grooves formed in a lifting drive lever in alignment in the longitudinal direction thereof with a regular interval
  • the locking means comprises a plurality of locking cylinders secured on the feed carrier and two portions of the press main body respectively in opposition to the engaging plate and two engaging portions to engage with respective one of engaging holes and recessed groove.
  • the locking cylinder is placed at locking position by a biasing means and at an unlocking position by a hydraulic pressure.
  • the locking device for mechanically locking the drive mechanisms for driving the transfer bars in feeding, lifting and clamping directions even when engineer performs maintenance or repair by entering into the transfer feeder, the transfer bars or its driving portions will never move unexpectedly due to their own weight or so forth to ensure safety in maintenance and repairing operations.
  • the reference numeral 1 denotes a main body of a transfer press, which includes a moving bolster 2 .
  • a pair of transfer bars 4 of a transfer feeder 3 are provided above the moving bolster 2 .
  • the transfer bars 4 are provided in parallel relationship orienting in parallel to the transfer direction of not shown works.
  • the transfer bars 4 are adapted to be driven in three-dimensional directions of feeding direction, lifting direction and clamping direction by a driving force taken off by a not shown power take off provided in the main body of the press 1 .
  • a locking device 7 according to the present invention is provided in the vicinity of a feed carrier 5a of a feed drive mechanism 5 or an equalizer bar 6 provided in a lift and clamp mechanisms (both being not shown).
  • the locking device 7 has an engaging plate 8 fixedly secured on the feed carrier 5a or the equalizer bar 6 .
  • the engaging plate 8 is formed with a plurality of engaging holes 8a aligned in the longitudinal direction with a regular interval and dogs 8b at the positions corresponding to the engaging holes 8a .
  • the dogs 8b are adapted to be detected by means of a detector 9 , such as a proximity switch, movable along the engaging plate 8 .
  • the detector 9 is mounted on a sliding member 7b movably supported on a base 7a of the locking device 7 via a bracket 10 .
  • a thread shaft 12 which is rotatingly driven by a feeding motor 11 is engaged with the lower portion of the sliding member 7b so that the sliding member 7b is driven to move along the engaging plate 8 by means of the feeding motor 11 .
  • the sliding member 7b carries a locking pin 13 in opposition to the engaging plate 8 , which lock pin 13 has a tip end entering into the engaging hole 8a of the engaging plate 8 to lock the engaging plate 8 .
  • the locking pin 13 is normally biased toward the engaging plate 8 by means of a compression spring 14 so as to establish locking for the engaging plate by the effect of the compression spring 14 .
  • the rear end of the locking pin 13 is connected to a hydraulic cylinder 15 so as to unlock the engaging plate in response to a hydraulic pressure supplied from a pressurized fluid source 18 via an electromagnetic valve 16 and a piping 17 .
  • the reference numeral 19 denotes a detector for detecting locking and unlocking states of the locking pin 13 .
  • the detector 9 Since the detector 9 is provided on the sliding member 7b , the detector 9 detects the dogs 8b of the engaging plate 8 . In response to a signal from the detector 9 , an electromagnetic valve 16 is switched from a communicating position 16a to a drain position 16b so that a work fluid in the hydraulic cylinder is drained.
  • the locking pin 13 is projected in the direction toward the engaging plate 8 by the action of the compression spring 14 and thus inserted into the engaging hole 8a at the corresponding position to the detected dog 8b . Therefore, the feed carrier 5a or the equalizer bar 6 of the lifting and clamping mechanisms fixed to the engaging plate 8 can be mechanically locked. Therefore, unexpected movement of the transfer bars due to its own weight during maintenance or repairing operation can be certainly prevented.
  • a press main body 21 takes off the driving force for rotatingly driving a cam shaft 26 by the taken off driving force.
  • a feeding cam 26a , a clamping cam 26b and a lifting cam 26c are provided on the cam shaft 26 .
  • a feed carrier 7 is driven by the feeding cam 6a .
  • a clamping drive lever 8 is driven by the clamping cam 6b .
  • a lifting drive lever 9 is driven by the lifting cam 6c .
  • the transfer bars 4 are driven in a three-dimensional directions, i.e. feeding and returning direction, clamping and unclamping direction and lifting and lowering direction, by the feed carrier 7 , the clamping drive lever 8 and the lifting drive lever 9 .
  • Locking devices 10 are respectively provided in the vicinity of the feed carrier 7 , the clamping drive lever 8 and the lifting drive lever 9 .
  • the locking device 10 provided for the feed carrier 7 has locking cylinders 11 arranged at both sides of the feed carrier 7 .
  • a piston rod 11a projected from the locking cylinder 11 is adapted to insert the tip end portion thereof into an engaging hole 12a of an engaging plate 12 provided on the upright side 1a of the press main body 1 for locking the feed carrier.
  • the locking devices 10 provided in the vicinity of the clamping drive lever 8 and the lifting drive lever 9 have locking cylinders 11 which are constructed to engage the tip ends of the piston rods 11b to a plurality of recess form engaging portions 8a and 9a respectively aligned in the longitudinal directions of the clamping drive lever 8 and the lifting drive lever 9 .
  • the locking cylinders 11 are mounted on a stationary portion, such as a bed of the press main body 1 by means of brackets 10a . As shown in Figs. 3 and 4 , the interior space of the lock cylinder 11 is divided into a pressure chamber 111 and a spring chamber 112 by the piston 11a . A hydraulic pressure is supplied to the pressure chamber 111 from a pressurized fluid source 13 via an electromagnetic valve 14 . On the other hand, a compression spring 11c for biasing the piston 11a in the locking direction is housed within the spring chamber 112 .
  • a dog 15 is carried on the tip end of the actuation rod.
  • a lock detector 16 comprising a proximity switch is adapted to detect the dog 15 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Advancing Webs (AREA)
EP90907478A 1990-05-25 1990-05-25 Verriegelungsvorrichtung für eine transfereinrichtung Expired - Lifetime EP0531523B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1990/000676 WO1991018691A1 (en) 1990-05-25 1990-05-25 Locking device of transfer feeder

Publications (3)

Publication Number Publication Date
EP0531523A1 true EP0531523A1 (de) 1993-03-17
EP0531523A4 EP0531523A4 (en) 1993-10-20
EP0531523B1 EP0531523B1 (de) 1997-08-13

Family

ID=13986529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907478A Expired - Lifetime EP0531523B1 (de) 1990-05-25 1990-05-25 Verriegelungsvorrichtung für eine transfereinrichtung

Country Status (4)

Country Link
EP (1) EP0531523B1 (de)
KR (1) KR960008686B1 (de)
DE (1) DE69031282T2 (de)
WO (1) WO1991018691A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102091803A (zh) * 2011-03-29 2011-06-15 桐庐百力锁具厂 一种锁具打孔机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0116684A1 (de) * 1982-09-24 1984-08-29 L. SCHULER GmbH Pressen-Einheit mit zugleich mit dem Werkzeugwechsel aus zutauschenden Greiferschienen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5749029U (de) * 1980-09-04 1982-03-19
JPH0618676B2 (ja) * 1984-10-23 1994-03-16 株式会社小松製作所 プレス用材料搬送装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0116684A1 (de) * 1982-09-24 1984-08-29 L. SCHULER GmbH Pressen-Einheit mit zugleich mit dem Werkzeugwechsel aus zutauschenden Greiferschienen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9118691A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102091803A (zh) * 2011-03-29 2011-06-15 桐庐百力锁具厂 一种锁具打孔机
CN102091803B (zh) * 2011-03-29 2012-07-04 桐庐百力锁具厂 一种锁具打孔机

Also Published As

Publication number Publication date
DE69031282T2 (de) 1998-01-02
EP0531523A4 (en) 1993-10-20
KR960008686B1 (ko) 1996-06-29
KR930700230A (ko) 1993-03-13
EP0531523B1 (de) 1997-08-13
WO1991018691A1 (en) 1991-12-12
DE69031282D1 (de) 1997-09-18

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