US3306413A - Apparatus for stopping mechanically driven presses - Google Patents

Apparatus for stopping mechanically driven presses Download PDF

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Publication number
US3306413A
US3306413A US584295A US58429566A US3306413A US 3306413 A US3306413 A US 3306413A US 584295 A US584295 A US 584295A US 58429566 A US58429566 A US 58429566A US 3306413 A US3306413 A US 3306413A
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United States
Prior art keywords
flywheel
shaft
press
coupling
lever
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Expired - Lifetime
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US584295A
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English (en)
Inventor
Weber Alfred
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/02—Screens or other safety members moving in synchronism with members which move to and fro
    • F16P3/04—Screens or other safety members moving in synchronism with members which move to and fro for machines with parts which approach one another during operation, e.g. for stamping presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/10—Brakes specially adapted for presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/02—Clutches in which the members have interengaging parts disengaged by a contact of a part mounted on the clutch with a stationarily-mounted member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F16D11/02—Clutches in which the members have interengaging parts disengaged by a contact of a part mounted on the clutch with a stationarily-mounted member
    • F16D11/06—Clutches in which the members have interengaging parts disengaged by a contact of a part mounted on the clutch with a stationarily-mounted member with clutching members movable otherwise than only axially, e.g. rotatable keys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D67/00—Combinations of couplings and brakes; Combinations of clutches and brakes
    • F16D67/02—Clutch-brake combinations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/001—Safety devices for guarding the human operator of punch presses or like machine tools performing an opening and closing travel
    • F16P3/003—Safety devices for guarding the human operator of punch presses or like machine tools performing an opening and closing travel by application of a specific control arrangement, e.g. specific switching systems or two-hand control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P7/00—Emergency devices preventing damage to a machine or apparatus
    • F16P7/02—Emergency devices preventing damage to a machine or apparatus by causing the machine to stop on the occurrence of dangerous conditions therein

Definitions

  • This invention relates to an apparatus for stopping mechanically driven presses, by means of a brake, employing a rotary key coupling with an arrester ring the cams of which co-operate with a displaceable member.
  • Brakes acting on the eccentric shaft of a press have already been proposed; these may be electrically controlled by scanning or sensor contacts and are intended to arrest the press in case of accident.
  • been proposed which are intended to effect cushioned disengagement of the rotary key coupling, so that fracture of the rotary key or of other machine parts is avoided.
  • these proposed devices do not take into account the fact that the flywheel or cogwheel which continues to rotate constitutes a great source of danger.
  • an apparatus for stopping mechanically driven presses by mean-s of a brake comprising a rotary key coupling and an arrester ring having cams or the like which co-operate with a displaceable member, wherein a brake is arranged adjacent the flywheel of the press and the displaceable member is mounted for displacement by a cam or the like of the arrester ring and is mechanically coupled with a switch arranged to cut off the press drive and with means for actuating the brake.
  • This arrangement offers the advantage over the previously known presses that in case of danger not only the press is switched off, but the flywheel of the press is also stopped. This is effected by the displaceable member which is coupled with the brake-actuating mechanism.
  • the arrangement also provides an improved safety factor in that the displaceable member simultaneously actuates a cut-off switch of the press drive.
  • the displaceable member is resiliently mounted in a guide of a pivotal control lever, and has a wedge-shaped ramp face co-operating with a stationary stop.
  • the displaceable member acquires in this manner its axial component of movement for actuating the brake and for switching off the press drive, thereby preventing fracture and all its detrimental consequences.
  • the displaceable member carries a projection in the range of movement of which the cut-off switch is located.
  • the brake block is mounted obliquely and, in the disengaged position, bears with one face against the load arm of a bell-crank lever, the forcearm of which co-operates with the locking lever of the brake lever arrangement.
  • This force-arm is advantageously loaded with a weight which actuates tightening of the brake when the bell-crank lever is released by the locking lever.
  • the mechanical coupling between the displaceable member and the cut-off switch has a smaller play than that between the member and the brake.
  • FIG. 1 is a partly exploded side elevation of a press of which a few parts are omitted;
  • FIG. 2 is a fragmentary view in the direction of arrow H of FIG. 1;
  • FIG. 3 is a view partially in section through the rotary key coupling
  • FIG. 4 is a section on the lines 4-4 of FIG. 3 showing the coupling in its released position
  • FIG. 5 is a section on the same lines as FIG. 4, but showing the coupling in its engaged condition
  • FIG. 6 is a section on the lines 66 of FIG. 3 showing the coupling in its released condition
  • FIG. 7 is a section on the same lines as FIG. 6 showing the coupling in its engaged position
  • FIG. 8 is a section on the lines 8-8 of FIG. 3 showing a coupling in released position
  • FIG. 9 is a section on the same lines as FIG. 8 showing the coupling in engaged position.
  • FIGS. 3 to 9 inclusive for a description of the rotary key coupling between the flywheel and the shaft and the manner of operation of this coupling by the arrester ring, the shaft 2 is coupled and de-coupled to the flywheel 3 by means of a rotary coupling member 4.
  • the relationship between these parts is shown most clearly in FIGS. 3, 8 and 9.
  • the rotary key coupling is always engaged with the arrester ring 6 and this relationship is shown most clearly in FIGS. 3, 4 and 5.
  • the arrester ring 6 carries a pair of cams or abutment members 8 and 9.
  • FIGS. 6 and 7 which are both sectional views on the lines 6-6 of FIG. 3, a biasing spring member 60 is shown, which normally biases the rotary coupling member 4 toward coupling position as shown in FIG. 5. If the shaft 2 is rotated backward, the arresting ring 6 can be moved to flywheel coupling position as shown in FIGS. 5, 7 and 9. The rotary coupling key 4 is thus rotated on its own axis.
  • the rotary key coupling In normal operation of the press, the rotary key coupling is in the position where the flywheel 3 is coupled to the shaft 2 and following one revolution of the press, the abutment 10 is placed into the path of the cams 8 and 9 which is effective to de-couple the flywheel from the shaft at the end of the press stroke.
  • the present invention is concerned with preventing dam-age to the press in the event that for some reason at the end of a press cycle, the rotary key coupling jams or breaks in some manner which prevents de-coupling of the flywheel from the shaft.
  • the arrester ring 6 carries two cams 8 and 9. Into the range of movement of these cams 8, 9, projects lug 10 of a displaceable stopping member 11, which is mounted on arm 12 of a control lever 14 pivotable about pin 13. To this end, the free end of the lever arm 12 is fork-shaped and the two branches 15 of the fork are connected by a bolt 16. In guide 17 constituted by the fork branches 15 and the bolt 16 of the lever arm 12, the displaceable member is maintained by a stem 18 in the position, shown in FIG. 1, bearing against the bolt 16. The stem 18 is located in a recess 19 of the lever arm 12 and is under the action of cup springs 20.
  • the lug 10 of the member 11 On its underside, the lug 10 of the member 11 has a ramp face 21, which co-operates with a stationary stop 22 when the lug 10 is acted on by one of the cams 8 or 9 of the arrester ring 6. Owing to the face 21 sliding on the stop 22, the member 11 executes a movement into the position 23 indicated by broken lines.
  • References 24 and 25 designate an engaging rod linkage to be actuated in a known manner; the lever 25 pivots about hinge point 26 and during a movement in the direction of arrow 27 raises setting lever 28, so that the control lever 14 is pivoted about its center of rotation 13 to the position indicated by broken lines, thus moving the lug 10 out of engagement with cam 8 or 9. In this state, the press is operative. During this sequence of movements, the member 11 pivots together with the arm 12 of the control lever 14, without being axially displaced in relation to its guide 17.
  • FIG. 1 shows the position with the brake block 31 retracted. End 33 of the brake block 31 bears against a compression spring 34, which in turn has a counter-bearing 35. Compression screw 36 serves for releasing the brake block 31 from the flywheel 32 in case the force of the spring 34 should not be suflicient to effect this.
  • Face 37 of the brake block 31 is formed as a wedge surface.
  • roller 38 of load arm 39 of a bell-crank lever 41 which is pivotable about axis 40.
  • the force arm 42 of lever 41 is under the loading of a weight 43 and is extended at one end to a grip 44.
  • This force arm 42 is within the range of movement of a locking lever 45, which is mounted on shaft 46.
  • the shaft 46 is mounted in the machine frame 1, in bearings 47 and 48, and carries on its other end a trip lever 49 on which rod 50 rests.
  • Rod 50 is guided in bearing 51 in the machine frame 1, and has two adjusting rings 52 and 53 which define the range of its axial movement.
  • a compression spring 54 is provided between the adjusting ring 53 and the bearing 51.
  • the locking lever is associated with a safety bolt 55.
  • the member 11 has a projection 56 in the range of movement of which there is located operating lever 57 of cut-otf switch 58 of the press drive motor (not shown).
  • the member 11 with its lug 10 is brought within the range of movement of the rotating cams 8, 9 of the arrester ring 6 (see FIG. 1) by actuating the engaging rod engagement 24, 25, 28.
  • the cams 8, 9 meets the lug 10
  • the latter is pivoted downward against the section of the springs 20, so that the face 21 engages and runs on the stationary stop 22.
  • the control lever 14 pivots about its pin 13.
  • end 59 of the member 11 first runs the distance a whereby the projection 56 actuates the lever 57 and the cut-off switch 58, so that the drive motor of the press is stopped.
  • the arm 42 of the lever 41 is raised by means of the grip 44, so that the compression spring 34 can move the brake block 31 in the direction opposite to that of arrow 62. If the force of the spring is insuflicient to effect this, then the disengaging screw 36 can be actuated.
  • the lever arm 42 is raised, the lug 61 of the locking lever 45 is again engaged, so that the situation shown in FIGS. 1 and 2 is re-established.
  • a rotary drive press comprising in combination:
  • the means for releasing said rotary coupling comprise an arrester ring mounted for rotation with said shaft, said ring in- 5 eluding cam means on its outer periphery; and movable abutment means positioned to be engaged by said cam means following each cycle of the press.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US584295A 1963-08-28 1966-09-06 Apparatus for stopping mechanically driven presses Expired - Lifetime US3306413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0035177 1963-08-28

Publications (1)

Publication Number Publication Date
US3306413A true US3306413A (en) 1967-02-28

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ID=7600823

Family Applications (1)

Application Number Title Priority Date Filing Date
US584295A Expired - Lifetime US3306413A (en) 1963-08-28 1966-09-06 Apparatus for stopping mechanically driven presses

Country Status (11)

Country Link
US (1) US3306413A (enrdf_load_stackoverflow)
AT (1) AT246573B (enrdf_load_stackoverflow)
BE (1) BE652407A (enrdf_load_stackoverflow)
CH (1) CH418831A (enrdf_load_stackoverflow)
DE (1) DE1502332C3 (enrdf_load_stackoverflow)
DK (1) DK106716C (enrdf_load_stackoverflow)
FR (1) FR1405090A (enrdf_load_stackoverflow)
GB (1) GB1026818A (enrdf_load_stackoverflow)
NL (2) NL6409836A (enrdf_load_stackoverflow)
NO (1) NO116745B (enrdf_load_stackoverflow)
SE (1) SE219138C1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107962093A (zh) * 2017-12-06 2018-04-27 郭文英 一种具有制动装置的卷板机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421053A1 (fr) * 1978-03-29 1979-10-26 Chapignac Ets Dispositif de securite pour presses a commande mecanique
DE9307904U1 (de) * 1993-02-19 1993-08-19 Frank Innovation GmbH, 40822 Mettmann Befestigungselement zur Befestigung von Gurten, Bändern oder Schlaufen an Kanten von flachen Werkstücken
CN111923485B (zh) * 2020-07-01 2022-03-04 浙江嘉轩机械有限公司 电动螺旋压力机的制动器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1681646A (en) * 1925-01-30 1928-08-21 Papas John Elias Safety device for power punch presses
US1706141A (en) * 1925-01-07 1929-03-19 Hamilton Press & Machinery Com Power-press control
US3084777A (en) * 1959-12-17 1963-04-09 Danly Mach Specialties Inc Mechanically operated friction clutch and brake assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706141A (en) * 1925-01-07 1929-03-19 Hamilton Press & Machinery Com Power-press control
US1681646A (en) * 1925-01-30 1928-08-21 Papas John Elias Safety device for power punch presses
US3084777A (en) * 1959-12-17 1963-04-09 Danly Mach Specialties Inc Mechanically operated friction clutch and brake assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107962093A (zh) * 2017-12-06 2018-04-27 郭文英 一种具有制动装置的卷板机
CN107962093B (zh) * 2017-12-06 2019-06-07 湘潭市智全机械有限公司 一种具有制动装置的卷板机

Also Published As

Publication number Publication date
NL128129C (enrdf_load_stackoverflow)
SE219138C1 (enrdf_load_stackoverflow) 1968-02-20
AT246573B (de) 1966-04-25
NL6409836A (enrdf_load_stackoverflow) 1965-03-01
BE652407A (enrdf_load_stackoverflow) 1964-12-16
NO116745B (enrdf_load_stackoverflow) 1969-05-12
DE1502332B2 (de) 1974-02-14
GB1026818A (en) 1966-04-20
DE1502332A1 (de) 1969-02-27
FR1405090A (fr) 1965-07-02
DK106716C (da) 1967-03-06
DE1502332C3 (de) 1974-08-29
CH418831A (de) 1966-08-15

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