US3864540A - Control arrangement for actuating a switching contact on a movable machine part - Google Patents

Control arrangement for actuating a switching contact on a movable machine part Download PDF

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Publication number
US3864540A
US3864540A US199594A US19959471A US3864540A US 3864540 A US3864540 A US 3864540A US 199594 A US199594 A US 199594A US 19959471 A US19959471 A US 19959471A US 3864540 A US3864540 A US 3864540A
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US
United States
Prior art keywords
switching contact
flat band
actuating member
actuating
switching
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.)
Expired - Lifetime
Application number
US199594A
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English (en)
Inventor
Wilhelm Saumer
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.)
KLOECKNER FERROMATIK GmbH
KLOECKNER-FERROMATIK GmbH
Original Assignee
KLOECKNER FERROMATIK GmbH
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
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Publication of US3864540A publication Critical patent/US3864540A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/06—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using cams, discs, rods, drums or the like
    • G05B19/063—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using cams, discs, rods, drums or the like for sequential programme-control without delivering a reference value

Definitions

  • ABSTRACT [21] APPL 199,594 A control arrangement for actuating switching contacts.
  • the arrangement comprises at least one switching contact which coacts with a control surface Foreign APPhcatmn Priority Data mounted on an actuating member.
  • the actuating Nov. 21, 1970 Germany 2057277 member and the switching contact move relatively to each other, said movement corresponding to the [52] US. Cl. 200/153 R, 200/47, 200/286, movement of a machine part in a machine.
  • the actua- 317/DIG. 2 tion of the switching Contact is effected by the change [51] Int. Cl. H01] 36/00 in distance between the control surface and the [58] Field of Search...
  • control surface is mounted on 200/38 C, 61.14, 61.18, 61.13; 317/DlG. 2; one side of the actuating member and is formed by 340/259 means of a flexible flat band which can be adjusted along a plane parallel to the path of the control switch [56] References Cited relative to the actuating member.
  • the invention relates to a control arrangement for actuating a switching contact mounted on a movable machine part.
  • the actuating member has a control surface and the arrangement operates by a relative movement taking place between the control surface of the actuating member and switching contact.
  • the switching contact is actuated when there occurs a change in distance between the control surface and the switching Contact.
  • the switching contacts are actuated by adjustable cams. Since these cams only close the switching contacts in accordance with their effective length for a short period of time, it is necessary to provide in the electric control system of the machine a so-called memory switch" if the machine function controlled by the switching contact is to continue. In such a known arrangement, an increased wear is placed on the switching means, in particular when the switching contact is to be actuated several times during the movement of the machine part.
  • control bars for actuating switching contacts for extended periods of time; these control bars maintain the switching Contact closed over an effective length corresponding to the extent of movement'of a machine part.
  • control bar has a length corresponding to the length of the relative movement of the machine part. If it is desired that the contact is effected only at the end of the relative movement of the machine part, then it is necessary to have the necessary length of the control bar project from the mounting arrangement. This type of known arrangement, therefore, requires a considerable amount of space which makes it difficult to install the arrangement and to mount other machine parts around it.
  • the adjustement of the control arrangement can thus be effected without the use of so-called memory switches.”
  • This object of the invention is accomplished by providing a control surface mounted on one side of an actuating member and which is formed by a flat band extending parallelly to the actuating member and being provided with an adjusting mechanism which serves to adjust the effective length of the control surface formed by the flat band.
  • This type of an actuating member can coact with all types of switching contacts.
  • the actuating member can coact with switching contacts that make actual physical contact with the flat band or with switching contacts that do not come into contact with the flat band. It isnecessary, however, to provide a flat, metallic band in the latter case.
  • one end of the flat band may be secured to a shaft which is rotatably mounted in the actuating member and is biased by a torsion spring so as to spool the flat band onto it.
  • the other end of the flat band is secured to an adjusting member the position of which can be adjusted in the longitudinal direction of the flat band on the actuating member.
  • the adjusting member determines the switching point of the switching contact.
  • FIG. 1 is a schematic crosssectional elevational view of a control arrangement in accordance with this invention in which the switching contacts are of the non-contacting type;
  • FIG. 2 is a schematic plan view of the control arrangement of FIG. 1;
  • FIG. 3 is a schematic elevational cross-sectional view of a second embodiment of the control arrangement
  • FIG. 4 is a cross-sectional schematic elevational view of a third embodiment of the control arrangement of the invention.
  • control arrangement schematically illustrated in 'FIG. 1 includes a frame 11 and a switching contact 15 which undergo a relative movement with respect to each other so that the switching contact A will reach the position B.
  • the sides of the frame 11 facing each other have mounted thereon clamping means 12 and 13 which serve to support an elastic flat band 14.
  • a rail 21 is also mounted between the frame 11.
  • An adjusting member is mounted on the rail 21.
  • This adjusting member 19 has a pair of clamping members 19a and 1911 through which there is threadably mounted an adjusting bolt 20.
  • the adjusting member 19 is further provided with two idle rollers'l7 and 18, mounted at different levels, which guide the flat elastic band 14 onto two different levels.
  • the left portion of the flat band 14 which extends from the left idle roller 17 to the clamping means 12 is spaced only a short distance from the switching contact when it is in the position B while the distance between the flat band 14 and the switching contact when it is in the position A is substantially larger.
  • the rail 21 has a longitudinal slit 22 along which the adjusting member 19 is slidably, movably mounted.
  • the adjusting member 19 has an indicia marking projection 19c which coacts with a scale 28 arranged on the upper part of the rail 21. In this way the adjustment of the adjusting member 19 can be repeated by observing at all times the position of the adjusting member 19 with respect to the rail 21.
  • the control arrangement illustrated in FIGS. 1 and 2 can, for example, be used for controlling the movement of an injection molding machine, wherein the control contacts determine the limits of the opening movement of a molding tool.
  • the switching contacts illustrated in FIGS. 1 and 2, which are of the non-contacting type, may have inductive coils 16 arranged therein, which, when approaching the metallic flat band 14, bring about a change in the inductive current in the coil. This change in current serves for actuating the switching contact.
  • the switching contact 15 in the embodiment illustrated in FIG. 3, there are provided two adjusting members 19 and 23 in order to provide two switching points during the relative movement between the switching contact 15 and the frame 11.
  • the illustrated position A of the contact switch 15 the latter is open. It is closed when the switching point B is reached and remains closed during the traverse of the control paths B-D. Thus the switching contact 15 remains closed when it reaches the position C.
  • the switching contact is released and remains open while reaching, for example, the position E due to the change in distance between the switching contact 15 and the metallic band 14. Should the frame 11 move now in the opposite direction relative to the contact 15, then when the position D is reached, the contact switch 15 is again closed.
  • This type of control can, for example, be used to actuate in an injection mechanism of an injection molding machine wherein the switching contact 15 is closed once it reaches the position B and the ejection mechanism is moved back to the exit position when the switching contact has reached the position D.
  • flat band 14 is not supported at opposite ends in the frame 35.
  • An adjusting member 27 is secured to the free end of the flat band 14.
  • a shaft 34 onto which the flat band is spooled.
  • the shaft 34 is mounted in a magazine-type housing 33 which forms an extension of the rail 39 and a unit with the frame 35.
  • the shaft 34 is rotatably mounted in the housing 33 and is biased in the direction ofthe arrow 32 by means of a non-illustrated torsion spring. so that the flat band 14 is maintained under tension by means of the torsion spring which acts on the flat band 14 via the idle roller 31.
  • the switching point ofthe non-contacting type of control switch 15 is determined by the position of the adjusting member 27.
  • the position of the adjusting member 27 is adjuated by means of loosening the setting bolt 30 so that the frictional engagement between the members 37 and 29 is released due to the unscrewing of the setting bolt 30 and the adjusting member 27 can be slidably moved along the rail 39. Simultaneously with the movement of the setting member 27, the flat band 14 is unspooled or spooled onto the shaft 34.
  • the non-contacting control switch 15 is closed when it reaches the position B, while it remains open in the position A.
  • actuating member and switching contact being adapted to move relative to each other, said movement corresponding to the movement of a part of said machine
  • said switching contact being adapted to be actuated by said flat band when said switching contact has reached a predetermined first position relative to said flexible flat band and being adapted to be deactuated when said switching contact has moved from said first position to a predetermined second portion relative to said flat band;
  • a shaft rotatably mounted in said actuating member and being biased to rotate in one direction, one end of said flexible flat band being secured to said shaft and the other end of said flat band being secured to said adjusting means, said adjusting means being adjustably movably mounted longitudinally with respect to said flat band on said actuating member.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Control Of Position Or Direction (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US199594A 1970-11-21 1971-11-17 Control arrangement for actuating a switching contact on a movable machine part Expired - Lifetime US3864540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702057277 DE2057277A1 (de) 1970-11-21 1970-11-21 Steuereinrichtung zur Betaetigung von Steuerungskontakten an bewegten Maschinenteilen

Publications (1)

Publication Number Publication Date
US3864540A true US3864540A (en) 1975-02-04

Family

ID=5788728

Family Applications (1)

Application Number Title Priority Date Filing Date
US199594A Expired - Lifetime US3864540A (en) 1970-11-21 1971-11-17 Control arrangement for actuating a switching contact on a movable machine part

Country Status (11)

Country Link
US (1) US3864540A (enrdf_load_stackoverflow)
JP (1) JPS519909B1 (enrdf_load_stackoverflow)
AT (1) AT306160B (enrdf_load_stackoverflow)
CH (1) CH528785A (enrdf_load_stackoverflow)
DE (1) DE2057277A1 (enrdf_load_stackoverflow)
ES (1) ES396838A1 (enrdf_load_stackoverflow)
FR (1) FR2115882A5 (enrdf_load_stackoverflow)
GB (1) GB1366109A (enrdf_load_stackoverflow)
IT (1) IT946058B (enrdf_load_stackoverflow)
NL (1) NL7116061A (enrdf_load_stackoverflow)
SE (1) SE368465B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5270004U (enrdf_load_stackoverflow) * 1975-11-19 1977-05-25

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874239A (en) * 1958-06-27 1959-02-17 Doneit Frederick Program timing switch assembly
US2911634A (en) * 1957-02-25 1959-11-03 Muirhead & Co Ltd Protective apparatus for electrosensitive paper recorders
US3525829A (en) * 1968-10-30 1970-08-25 Fredric S Miller Cycle timer
US3548138A (en) * 1968-07-18 1970-12-15 Bell Telephone Labor Inc Rolamite pushbutton switch
US3562464A (en) * 1968-10-07 1971-02-09 Tektronix Inc Cam actuated switch having movable and fixed contacts on circuit board
US3626129A (en) * 1970-01-21 1971-12-07 Koehring Co Position control device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2911634A (en) * 1957-02-25 1959-11-03 Muirhead & Co Ltd Protective apparatus for electrosensitive paper recorders
US2874239A (en) * 1958-06-27 1959-02-17 Doneit Frederick Program timing switch assembly
US3548138A (en) * 1968-07-18 1970-12-15 Bell Telephone Labor Inc Rolamite pushbutton switch
US3562464A (en) * 1968-10-07 1971-02-09 Tektronix Inc Cam actuated switch having movable and fixed contacts on circuit board
US3525829A (en) * 1968-10-30 1970-08-25 Fredric S Miller Cycle timer
US3626129A (en) * 1970-01-21 1971-12-07 Koehring Co Position control device

Also Published As

Publication number Publication date
AT306160B (de) 1973-03-26
FR2115882A5 (enrdf_load_stackoverflow) 1972-07-07
GB1366109A (en) 1974-09-11
NL7116061A (enrdf_load_stackoverflow) 1972-05-24
JPS519909B1 (enrdf_load_stackoverflow) 1976-03-31
ES396838A1 (es) 1974-06-16
DE2057277A1 (de) 1972-07-27
CH528785A (de) 1972-09-30
SE368465B (enrdf_load_stackoverflow) 1974-07-01
IT946058B (it) 1973-05-21

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