US3874282A - Domestic refuse compactor - Google Patents

Domestic refuse compactor Download PDF

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Publication number
US3874282A
US3874282A US390707A US39070773A US3874282A US 3874282 A US3874282 A US 3874282A US 390707 A US390707 A US 390707A US 39070773 A US39070773 A US 39070773A US 3874282 A US3874282 A US 3874282A
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United States
Prior art keywords
refuse
key switch
cam
locking
compactor
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
US390707A
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English (en)
Inventor
Keizi Oouchi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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Filing date
Publication date
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Publication of US3874282A publication Critical patent/US3874282A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B30B9/3007—Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/30—Presses specially adapted for particular purposes for baling; Compression boxes therefor
    • B30B9/3003—Details
    • B30B9/3032—Press boxes

Definitions

  • a domestic refuse compactor comprising a'cabinet PP bio-1390507 with a front entrance, a device for compressing or crushing refuse, an arrangement for holding a refuse- 30 F
  • 2 2 refuse-container holding arrangement in the inner pol sition for compaction.
  • the key switch mechanism is operatively connected to the locking mechanism so [56] References C'ted that it can work only when the latter is operable, and UNITED STATES PATENTS has a cam which can close a microswitch for power 3.613.560 10/1971 Bottus et al 100/53 supply and, at the same time, actuate a spring-loaded 3.654.855 4/1972 Longo 100/229 A to er f the lock mechanism to lock the door sel Tang X curely the machine is in Operation 3,772,984 1 1/1973 Karls ct a1 100/229 A 4 Claims, 4 Drawing Figures L x l 3 7 r 2 FT /4 DOMESTIC REFUSE COMPACTOR BACKGROUND OF THE INVENTION
  • This invention relates to a domestic refuse compactor and is particularly concerned with a compactor that compresses and packs the household trash, such as wastepaper and newspaper, rags, emptied cartons, cans and bottles, and garbage, into paper bags for efficient
  • the domestic refuse compactors hitherto proposed have been usually equipped with two or three safety devices, quite common in types, to protect the users.
  • the ordinary safety devices include, for example, keyoperated, door or drawer, and emergency stop switches.
  • the key-operated switch designed to preclude playful handling of the machine by children, comprises a cylinder key or other key means built in the compactor cabinet and is associated with a switch for closing a power supply circuit only when a key is inserted into the switch.
  • the door or drawer switch is actuated by the movement of a door or drawer of the compactor so as to shut off the power supply when the door or drawer is opened for placement of refuse into the compactor.
  • the emergency stop switch cuts off the power circuit in case of an emergency.
  • Another object of the invention is to provide a compactor wherein the reaction force of a return spring provided in the door or drawer lcok mechanism is utilized to press and hold in position the cam for actuating the key switch and lock mechanism when the cam has been turned beyond its dead center, thereby avoiding the possibility of the cam being brought back past its dead center by the vibration of the compactor and thus stopping the machine.
  • FIG. 1 is a right side view, partly broken away, of an embodiment of the present invention
  • FIG. 2 is an enlarged sectional view of a portion of the embodiment shown in FIG. 1;
  • FIG. 3 is an inside view as seen in the direction of an arrow III in FIG. 2;
  • FIG. 4 is a schematic diagram of the electric circuitry for the embodiment.
  • FIG. 1 there is illustrated a portion of a domestic refuse compactor l equipped with safety devices according to the invention, partly broken away to show the construction.
  • On the machine base 2 is mounted an electric motor 3, and four frame members 4 are held upright.
  • a ram 5 Surrounded by these frame members 4 is a ram 5, which is adapted to move up and down along the frame members serving as guide rails.
  • the ram 5 has a ram head 5a secured to its underside and also carries spherical nuts (not shown) attached by a housing 6 in a self-aligning manner. The nuts are in thread engagement with two screw shafts 7 at the right and left of the cabinet.
  • screw shafts 7 are rotatably journaled in the base 2 so that, when the rotational power motor 3 is transmitted thereto via transmitting means such as gearing or roller chain (not shown), the shafts rotate to move the spherical nuts in their axial directions. In this way the rotational power is converted into the vertical motion of the ram 5 to which the nuts are attached.
  • a ram 5 and ram head 5a there is placed an open-top refuse box 8 on base 2.
  • the inner side of a door 10 turnably hinged at its lower end to a stationary pin 9 on base 2 is disengageably connected to the front side of refuse box 8.
  • a handle 11 is provided at the upper end of door 10, and above the handle there are mounted a key switch mechanism 12 and a door lock mechanism 13. In contact with the lower part of the rear side of refuse box 8, a safety switch 14 is fixed to base 2. In the state shown, the switch at the rear of refuse box 8 is closed, thereby establishing the power supply circuit.
  • the arrangement is such that, when door 10 is opened, refuse box 8 inclines frontward thereby opening the safety switch and shutting off the power supply.
  • FIGS. 2 and 3 illustrate the details of the key switch mechanism. 12 and door lock mechanism 13.
  • a key 15 a front panel 16 of the cabinet, a bracket 17 supporting a microswitch to be described later, and a lock nut 18 fixing a cylinder key body 19 to front panel 16.
  • This lock nut 18 also secures bracket 17 to front panel 16.
  • Cylinder key body 19 comprises an inner cylinder 19a adapted to be re volved by key and an outer cylinder 19b that accommodates the inner cylinder revolvably therein.
  • Outer cylinder 19b is formed with a steplike extension 19c at its internal end.
  • a cam 21 for actuating the microswitch and lock mechanism is fastened to the inner cylinder 1911 by a screw 20.
  • the cam is formed with an outward protuberance 21a which, when the cam has been turned to the position indicated by solid lines in FIG. 3, engages with the steplike extension to keep the cam from further turning. It is so designed that, whenever its protuberance 21a and extension 19c engage in the manner described, the cam is in the position slightly beyond its dead center as indicated by the solid lines in FIG. 3. As cam 21 moves past the dead center, the actuating lever. 23 of a microswitch 22 is pushed to close the power circuit. At the same time, a stopper 24 is pushed down against the reaction force of a return spring 25 to enter holes 26 superposedly formed in the I door 10 and the handle 11.
  • the compactor ac cording to this invention is operated in the following manner.
  • stopper 24 of door lock mechanism 13 will work, without fail, to lock the door 10.
  • the microswitch 22 is opened and the power circuit is thereby cut off.
  • Return spring 25 also serves to prevent the loosening of cam 21 because it absorbs the vibration of the compactor in operation.
  • Theelectric circuitry including safety switch 14 and microswitch 22 is schematically shown in FIG. 4.
  • a starting switch 28 of the repulsion type Adjacent to these switches, a starting switch 28 of the repulsion type, which is closed as long as it is depressed and is opened upon releasing by the user, is arranged in parallel to a top limit switch 29, which is opened when ram 5 has ascended to its preset upper position and is closed as the ram commences the downward movement.
  • safety switch 14 Beyond these switches is located safety switch 14 and, still farther, as shown, there are provided motor 3 and a change-over switch 30 (which changes the connection of starting coil upon the initiation of the upward or downward movement of ram 5 over to a forward or reverse run). Although, these components constitute the power supply circuit. The circuit thus established is cut off if any one of the safety switch 14, microswitch 22, and emergency stop switch 27 is opened.
  • the user In order to operate the compactor, the user inserts key 15 into a corresponding slot and turns it thereby actuating microswitch 22 and then presses starting switch 28. This closes the power circuit and enables motor 3 to drive screw shafts 7, which in turn begin to bring ram 5 downward.
  • the downward movement of ram 5 immediately causes the top limit switch to close, whereby the circuit is kept closed even after the user has released the starting switch, and the ram continues to come down, either compressing or crushing the refuse in the box.
  • change-over switch 30 enables the ram to shift its direction, this time upward. As soon as the ram reaches its upper position, the top limit switch is actuated to shut off the power supply. The ram thus completes one cycle of operation.
  • the invention is not limited thereto but the combination of the let-down type door and refuse box may be supplanted by any other convenient combination, for example, by an arrangement wherein the refuse box of the illustrated embodiment takes the form of a drawer that can be drawn out frontward or an arrangement using a common door that can be swung open sidewise to the right or left. It should.
  • the user who desires to start the machine simply inserts .a key into the key slot and turns. This enables the actuating lever of the microswitch of the key switch mechanism to be raised by the cam while, at the same time, the
  • stopper of the lock mechanism is pushed down againstthe reaction force of the return spring to get into the holes of the door and handle. Thus, as long as the microswitch is closed, the door remains locked.
  • the stopper of the lock mechanism is unable to fit into the holes of the door and handle. Consequently, the stopper cannot be pushed down to its lower limit of travel and the cam cannot be turned, and hence the microswitch of the key switch mechanism cannot be closed.
  • the possiblity of the switch of the key switch mechanism being turned open by the vibration of the machine in operation is eliminated by the provision of the safety devices in accordance with this invention.
  • a further advantage is that the safety system provided by the invention is more inexpensive than the ordinary arrangement in which the door lock mechanism is installed independently of the other safety devices.
  • a safety key switch device comprising:
  • microswitch means for actuating the locking means, a cam member installed in the key switch device in such a manner that it moves upon actuation to a position which simultaneously closes the microswitch means and actuates the locking means,
  • said locking means includes return spring means for pressing an end of said locking means against the cam member, wherein said cam member has a configuration which is longer in one of its length and its width,
  • said key switch device includes means to stop the cam member in said position slightly beyond its dead center when the key switch device is actuated, so that the spring means operates to avoid movement of the cam out of said position, and
  • the device is operationally connected with a machine in such a manner that the locking means locks a door of the machine when actuated and the microswitch means actuates an electric motor drive of the machine when closed.
  • a domestic refuse compactor comprising a cabinet base, compressing-crushing means installed on the base to compress or crush refuse contained in refuse receiving means,
  • the locking means is a stopper, wherein the locking means further comprises means for holding the refuse receiving means selectively movably between a preset inner position for compaction on the base and an outer exposed position where the compact mass of refuse is to be removed from the compactor, and wherein the locking means locks the refuse receiving holding means in a preset position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Refuse Receptacles (AREA)
US390707A 1972-08-30 1973-08-23 Domestic refuse compactor Expired - Lifetime US3874282A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47086188A JPS4942165A (ja) 1972-08-30 1972-08-30

Publications (1)

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US3874282A true US3874282A (en) 1975-04-01

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JP (1) JPS4942165A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018148A (en) * 1975-09-16 1977-04-19 Broan Manufacturing Co., Inc. Latch for trash compactors
US4183295A (en) * 1978-03-20 1980-01-15 Peterson Robert A Trash compactor with cover mounted packing blade
US4580019A (en) * 1984-04-27 1986-04-01 Takigen Seizou Co., Ltd. Push-rotation type key switch device
US5795463A (en) * 1996-08-05 1998-08-18 Prokopowicz; Richard A. Oil demetalizing process
ES2214944A1 (es) * 2002-06-28 2004-09-16 Juan Manuel Gonzalez Villalba Compactador de residuos solidos urbanos.
US20070130711A1 (en) * 2005-12-09 2007-06-14 Jarmo Saarinen Mounting accessory for the cover plate of a handle
WO2009000092A1 (de) * 2007-06-25 2008-12-31 Gregor Schreier Kompakte presse mit druckfeder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613560A (en) * 1969-11-05 1971-10-19 Whirlpool Co Refuse compactor
US3654855A (en) * 1969-12-29 1972-04-11 Int Dynetics Corp Trash compaction unit
US3770930A (en) * 1972-01-03 1973-11-06 A Tang Microwave oven apparatus
US3772984A (en) * 1971-09-02 1973-11-20 Emerson Electric Co Compactor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613560A (en) * 1969-11-05 1971-10-19 Whirlpool Co Refuse compactor
US3654855A (en) * 1969-12-29 1972-04-11 Int Dynetics Corp Trash compaction unit
US3772984A (en) * 1971-09-02 1973-11-20 Emerson Electric Co Compactor
US3770930A (en) * 1972-01-03 1973-11-06 A Tang Microwave oven apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018148A (en) * 1975-09-16 1977-04-19 Broan Manufacturing Co., Inc. Latch for trash compactors
US4183295A (en) * 1978-03-20 1980-01-15 Peterson Robert A Trash compactor with cover mounted packing blade
US4580019A (en) * 1984-04-27 1986-04-01 Takigen Seizou Co., Ltd. Push-rotation type key switch device
US5795463A (en) * 1996-08-05 1998-08-18 Prokopowicz; Richard A. Oil demetalizing process
ES2214944A1 (es) * 2002-06-28 2004-09-16 Juan Manuel Gonzalez Villalba Compactador de residuos solidos urbanos.
US20070130711A1 (en) * 2005-12-09 2007-06-14 Jarmo Saarinen Mounting accessory for the cover plate of a handle
US7589291B2 (en) * 2005-12-09 2009-09-15 Abloy Oy Mounting accessory for the cover plate of a handle
WO2009000092A1 (de) * 2007-06-25 2008-12-31 Gregor Schreier Kompakte presse mit druckfeder

Also Published As

Publication number Publication date
JPS4942165A (ja) 1974-04-20

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