EP0877136B1 - Doors for refrigerating rooms, in particular sliding doors, with external locking device and internal safety opening device - Google Patents

Doors for refrigerating rooms, in particular sliding doors, with external locking device and internal safety opening device Download PDF

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Publication number
EP0877136B1
EP0877136B1 EP98108052A EP98108052A EP0877136B1 EP 0877136 B1 EP0877136 B1 EP 0877136B1 EP 98108052 A EP98108052 A EP 98108052A EP 98108052 A EP98108052 A EP 98108052A EP 0877136 B1 EP0877136 B1 EP 0877136B1
Authority
EP
European Patent Office
Prior art keywords
door
hole
pin
rooms according
lock
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
EP98108052A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0877136A3 (en
EP0877136A2 (en
Inventor
Giuseppe Garrone
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.)
M.T.H. MANIFATTURE TECNOLEGNO HARTZ S.R.L.
Original Assignee
Mth Manifatture Tecnolegno Hartz 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.)
Filing date
Publication date
Application filed by Mth Manifatture Tecnolegno Hartz Srl filed Critical Mth Manifatture Tecnolegno Hartz Srl
Publication of EP0877136A2 publication Critical patent/EP0877136A2/en
Publication of EP0877136A3 publication Critical patent/EP0877136A3/en
Application granted granted Critical
Publication of EP0877136B1 publication Critical patent/EP0877136B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/021—Sliding doors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details

Definitions

  • the present invention refers to a door for refrigerating rooms, in particular a sliding door, comprising a door-lock.
  • refrigerator rooms of large dimensions both for fruits preservation and meat preservation and/or freezing, consist of a chamber with insulated walls, which may also be built into a masonry room.
  • An opening to get access inside the refrigerating room is closed by a door that can be normally opened like a book or be sliding on guides.
  • Said doors are generally closed externally by various kinds of locking devices.
  • Locking devices can be realized to be used by anybody wanting to enter the refrigerating room or be equipped with a key for controlled access to the room.
  • Said locking devices generally consist of two parts, one part carrying a locking mechanism, i.e. a door-lock, and the other part carrying the means onto which the locking mechanism of the first part engages.
  • One part i.e. the door-lock, is assembled on the door external face and the other part on the fixed wall outside the room, near the relevant opening.
  • This kind of locking is rather complex and expensive as it requires assembly of a number of parts as well as a substantially exact coupling of the part assembled on the door with the one assembled on the room wall.
  • locking devices are provided with means which can release the locking mechanism by a simple pressure of one's hand and open the door by the pressure of said hand or both hands and/or the weight of one's body.
  • the present invention refers to a door having the features disclosed in the preamble of claim 1 which follows known doors of this Kind are disclosed in US-A-3 678 716 and US-A-2 207 568.
  • the present invention is based on the acknowledgment that through an appropriate configuration all locking elements may be assembled within the door thickness.
  • Fig. 1 showing schematically a room section with the door in closed position according to the present invention
  • number 1 indicates the opening to get access inside a room
  • number 2 a sliding door
  • number 3 the room walls defining the width of the opening
  • number 4 a elements or means to lock sliding of the door 2 for its opening (the arrow indicates the opening direction of the door 2), to hinder access inside the room.
  • Fig. 2 showing a horizontal section of a door-lock assembled on the room door according to the present invention
  • number 2 indicates the door
  • number 3 a wall defining the width of the room opening
  • number 4 the means to lock the sliding of the door 2
  • number 5 a door-lock.
  • the special configuration of the door-lock 5 and its position along a horizontal axis laying in the door plane 2 allows its insertion within the door thickness and without any element in sight on the door front face 2.
  • the external room wall has no elements cooperating with the door-lock for the locking of the door 2, since locking is obtained through the locking means 4 located on the internal part of the door 2.
  • Number 6 indicates a flanged tube made of plastic material, containing the door-lock 5 and inserted in a cylindrical seat obtained transversally in the thickness of the door 2.
  • Said tube 6 has a flange 7 which has the function of allowing the fixing of the tube 6 to the edge of the door 2 by means of screws, and has holes 8 and 8' (Fig. 5) for accommodating a pin 9 to stop rotation of the door-lock, as described later.
  • Number 10 indicates a properly configured casing tc accommodate the locking element 4 in its rest position as better represented in Fig. 3.
  • Said casing 10 is located in a recess on the internal part of the door 2 and has two holes on its side surfaces, which are indicated with number 11 and 12, respectively.
  • Said hole 11 contains the non flanged end of the tube 6, whereas the hole 12 is supporting an end of the door-lock 5 with an interposed bushing 13 in plastic material, acting as a frictionless bearing the rotation of the door-lock during closing and/or opening operations of the door 2.
  • Number 14 indicates a first metal small block of extended solid ring section and with rounded off ends, whose width is equal to or slightly smaller than the inside diameter of the tube 6.
  • Said first small block 14 has some mechanisms inside, known as such, which control a vertical movement of the pin 9 through a key.
  • said first small block 14 has an appendix 15 having a rectangular section, in a central position on one end, whose length is equal to and/or smaller than the length of the small block 14 and whose width is smaller than the width of the small block 14; said protozoon 15 has a hole 16 for a fastening gudgeon pin 17 to go through (Fig. 6).
  • Number 18 indicates a second cylindrical small block whose diameter is equal to and/or smaller than the inside diameter of the tube 6, which has a groove 19 on one end suitable to accommodate the appendix 15 of the first small block 14; moreover, it also presents a through-hole 20 perpendicular to said groove suitable to accommodate the gudgeon pin 17, as represented in Fig. 6.
  • Said gudgeon pin 17 connects the first small block 14 with the second cylindrical small block 18.
  • Said second cylindrical small block 18 has a groove 21 of semicircular section over all its outside perimeter apt to accommodate a pin 22.
  • Said pin 22 locks the second cylindrical small block 18 in the tube 6 cooperating with a hole 23 on the tube 6 as represented in Fig. 4.
  • Said pin 22 has an equal to and/or slightly smaller diameter than the width of the semicircular groove 21.
  • the height position of the axis of the hole 23 is in line with the outside diameter of the second cylindrical small block.
  • Number 24 indicates a portion of the second cylindrical small block 18 with a smaller diameter to reduce the friction of the block 18 with the tube 6 when said small block 18 is rotating within the tube 6.
  • said second cylindrical block 18 has a hole 25 of a truncated cone shape perpendicular to its horizontal axis and parallel to the pin axis 9 of the first small block 14. Said hole 25 is used to connect and control the locking means 4.
  • Number 26 indicates the body of the locking means 4, which is substantially configured as a rectangle parallelepiped with a semicylindrical base 27 and open on its front (Fig. 3).
  • Said base 27 has a through-hole 28 over its whole horizontal length whose diameter is equal to and/or slightly larger than the diameter of the cylinder 18 of the door-lock 5.
  • said base 27 has a central upright hole 34 connecting the hole 28 with the higher portion of the body 26.
  • Said hole 34 has a ring 35 increasing its length, which is obtained half on the body 26 and half on a lid 33 (Fig. 3).
  • Said three walls 29, 30 and 30' are connected to each other on the top by a horizontal wall 31, whose depth equals half the depth of side walls 30 and 30'.
  • Said upper wall 31 has an upright groove 32 of semicircular section on its center.
  • Number 33 indicates a closing lid for the front part of the locking element.
  • the section of said lid 33 is in the form of an upturned "L", with the shorter side closing the body upper part 26 striking against the wall 31.
  • Said shorter side has centrally on its free end an upright groove of semicircular section which, coupled with the groove 32 of the wall 31, form a hole 36 as represented in Fig. 8, whose diameter is smaller than the diameter of the hole 34.
  • the longer side of the lid 33 closes the open side of the body 26.
  • Said lid 33 is fastened with screws to the body 26 in a generally known manner.
  • Number 37 indicates a round pin having a first part with a diameter equal to and/or slightly smaller than the diameter of the hole 34, whose end protrudes out of the body 26 through the hole 34 itself, a second central part with a diameter equal to and/or slightly smaller than the diameter of the hole 36, whose size is smaller compared with the hole 36, thus forming a step between the two parts, and a third part with a smaller diameter than the diameter of the second part, which protrudes out of the body 26 through the hole 36 and is used as a connection for a knob 38.
  • Said first part of the pin 37 has a truncated cone end whose dimensions are equal to the truncated cone hole 25 in the cylinder 18, wherein it is inserted for the locking means 4 to be integral with the door-lock 5.
  • Said third section of the pin 37 is threaded all its length, where the knob 38 is screwed on.
  • Number 39 indicates a spiral spring inserted in the central part of the pin 37.
  • Said spring 39 works under compression and is assembled preloaded; it is kept in position by the tooth resulting from the difference of diameter between the first and second part of the pin 37 and the internal surface of both the upper wall 31 of the body and the shorter side of the lid 33.
  • Said spring 39 is provided to keep the truncated cone end of the first section of the pin 37 inserted in position in the truncated cone hole 25 of the cylinder 18, making the locking means 4 integral with the door-lock 5.
  • Number 42 indicates a control knob for door-lock 5 rotation.
  • Said knob 42 has a central slot whose size is equal to and/or larger than the section of the first small block 14. Moreover, it has an internal circular centering crown on a ring 44 of the tube 6. To improve knob rotation control, the circular crown is knurled.
  • the knob 42 is fastened by a threaded dowel, which is pressure screwed on the block 14 in a generally known manner.
  • Fig. 3 which represents a vertical section of a door locking device according to the present invention
  • number 4 indicates the locking means both in a locking position for allowing the door 2 to slide (solid line) and in a rest position (dashed line), number 2 the door, number 18 the cylindrical small block and number 37 the pin connecting the door-lock 5 with the locking means 4.
  • Fig. 4 representing in section a detail of the locking elements in the horizontal direction of the door-lock 5 in the tube 6 fastened internally to the door 2
  • number 6 indicates the flanged tube containing the door-lock 5
  • number 18 the second cylindrical small block
  • number 21 a semicircular throat on the small block
  • number 23 the through-hole on the tube 6
  • number 22 the locking pin of the small block 18 in the tube 6 and consequently locking of the door-lock 5.
  • the pin 22 in the through-hole 23 and in the throat 21 will not let the door-lock to be extracted any more from the tube when the latter is inserted within the door thickness and fastened therein.
  • Fig. 5 representing in section a detail of the locking system of the door-lock rotation
  • number 6 indicates the tube where the door-lock 5 is inserted
  • number 9 the rotation stop pin of the door-lock 5
  • number 14 the small block carrying the control elements of the pin 9 and number 8 and 8' the holes engaging the pin 9.
  • the figure represents the door-lock position during the door closing stage, i.e. with the locking means 4 in a horizontal position.
  • Figs. 7 and 8 representing two traverse sections of the locking means 4
  • number 26 indicates the body of the locking means 4
  • numbers 29, 30, 30' and 31 the walls forming the upper part of the locking means 4
  • number 33 the closing lid of the upper front section of the locking means 4.
  • Number 36 indicates the hole formed by coupling the semicircular groove 32 of the wall 3 1 with the semicircular groove of the shorter lid wall 33.
  • Number 34 indicates the through-hole for pin 37, numbers 40 and 41 the two bosses defining the run of the locking means 4.
  • the body 26 of the locking means 4 is provided with bosses 40 and 41, to lock the movement of the locking means 4 when it reaches the closure and/or opening position, striking on the casing 10.
  • the opening from inside the room can be obtained by pressing a button instead of pulling a knob.
  • number 45 indicates a locking element.
  • Number 46 indicates the body of the locking element 45, which is substantially configured as a rectangle parallelepiped with a semicylindrical base 47 and is open on the front.
  • Said base 47 has a through-hole 48 over all its length, whose diameter is equal to and/or slightly larger than the diameter of the cylinder small 18 of the door-lock 5.
  • said base 47 has a central vertical hole 49 connecting the hole 48 with the upper part of the body 46.
  • Said three walls 50, 51 and 51' are connected between each other on the top by a horizontal wall 52, whose depth equals half the depth of the side walls 50 and 50'.
  • Said upper wall 52 has two vertical grooves 53 of semicircular section.
  • Number 54 indicates a closing lid for the front section of the locking element.
  • Said lid 54 has the form of an upturned "L”, whose shorter side closes the upper part of the body 46 striking against the wall 52.
  • Said shorter side has two vertical grooves of semicircular section on its free end, which have the same center distance of the grooves 53 of the wall 52, so as to form two holes 55 when they are coupled together.
  • the longer side of the lid 54 closes the open side of the body 46.
  • Said lid 54 is fastened to the body 46 in a generally known manner with screws.
  • Number 56 indicates a pin having a first lower portion with a diameter equal to and/or slightly smaller than the diameter of the hole 49, whose end protrudes out of the body 46 through the hole 49, and a second portion with a larger diameter than the first portion and the hole 49, thus forming a step between the two parts. Said step works as a stop for the run of the pin 56.
  • Said first portion of the pin 56 has a truncated cone configuration, whose dimensions are equal to those of the truncated come hole 25 of the small cylinder 18 where it will be inserted for the locking element 4 to become integral with the door-lock 5.
  • Said second portion of the pin 56 has small teeth 57 over all its length.
  • Numbers 58 and 58' indicate two small gear wheels keyed on two small shafts on the wall 50 of the body 46, which engage the teeth 57 of the pin 56.
  • Numbers 59 and 59' indicate two vertically sliding elements within the body 46.
  • Said sliding elements 59 and 59' have a first portion 60 of rectangular section with an indented area engaging both gear wheels 58 and 58' and a second portion 61 of circular crown section protruding out of the body 46 through the holes 55.
  • Number 62 indicates a spiral spring assembled between the pin 56 and the internal surface of the upper wall of the body 46.
  • the spring 62 keeps the truncated cone end of the first portion 60 of the pin 56 inserted in the truncated cone hole 25 of the small cylinder 18, for the locking element 4 to become integral with the door-lock 5.
  • Number 63 indicates a knob having two pins 65, which are driven into the hole 64 of the second portion 61 of both sliding elements 59 and 59' to fasten the knob 63 to the locking element 45.
  • both sliding elements 59 and 59' are in their striking position against the internal surface of the upper wall 52 of the body 46.
  • the knob 63 is at distance from the body 46 since the second portion 61 of both sliding elements 59 and 59' where it is fastened to is protruding out of the body 46.
  • Said gear wheels 58 and 58' are connected with the pin 56 and cause the latter to make a movement upwards to release the pin from the door-lock.
  • the locking element 4 released from the door-lock falls down by gravity and the door will open.
  • Guides or guide lengths obtained in a generally known manner are provided on the body 46 to ensure a straight linear motion without side movements of the sliding elements 59 and 59' as well as of the pin 56.
  • a further embodiment such as in the instance of refrigerating rooms working at low temperatures, has a condense-proof wire heater 43 on aluminum foil added to the casing 10, in order to avoid blocking of the pin 37, as this would make it difficult for the door to be opened from inside the room.
  • a push switch actuated by the boss 41 of the locking element 4 may be inserted in the casing 10, to enable the motor operation only when the locking element 4 is in the closed position.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
  • Closures For Containers (AREA)
  • Wing Frames And Configurations (AREA)
  • Special Wing (AREA)
  • Lock And Its Accessories (AREA)
EP98108052A 1997-05-05 1998-05-04 Doors for refrigerating rooms, in particular sliding doors, with external locking device and internal safety opening device Expired - Lifetime EP0877136B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO970384 1997-05-05
IT97TO000384A IT1294382B1 (it) 1997-05-05 1997-05-05 Porte per celle refrigerate, in particolare porte scorrevoli, con chiusura esterna e con apertura interna di sicurezza.

Publications (3)

Publication Number Publication Date
EP0877136A2 EP0877136A2 (en) 1998-11-11
EP0877136A3 EP0877136A3 (en) 1999-11-03
EP0877136B1 true EP0877136B1 (en) 2004-03-10

Family

ID=11415696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98108052A Expired - Lifetime EP0877136B1 (en) 1997-05-05 1998-05-04 Doors for refrigerating rooms, in particular sliding doors, with external locking device and internal safety opening device

Country Status (4)

Country Link
EP (1) EP0877136B1 (enrdf_load_stackoverflow)
AT (1) ATE261534T1 (enrdf_load_stackoverflow)
DE (1) DE69822247D1 (enrdf_load_stackoverflow)
IT (1) IT1294382B1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2179743B1 (es) * 2000-08-10 2004-06-16 Infraca, S.L. Palanca para apertura exterior de puerta corrediza de camara frigorifica.
ES2177413B1 (es) * 2000-08-10 2004-08-16 Infraca, S.L. Palanca para apertura interior de puerta corrediza de camara frigorifica.
US11905741B2 (en) 2020-12-03 2024-02-20 Haier Us Appliance Solutions, Inc. Releasable locking mechanism for a refrigerated appliance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2207568A (en) * 1938-05-09 1940-07-09 C V Hill & Company Inc Latch mechanism for cold storage doors and the like
DE1096244B (de) * 1959-04-14 1960-12-29 Gust Kuhs Fa Einlassschloss, insbesondere fuer Schiebetueren
US3115763A (en) * 1961-05-18 1963-12-31 Mosler Harbor Metal Products C Lock for sliding doors
US3678716A (en) * 1971-03-11 1972-07-25 Westinghouse Electric Corp Latch mechanism for refrigerators freezers and the like
DE2601671C3 (de) * 1976-01-17 1982-02-18 Gebr. Thome Kg, 7512 Rheinstetten Verschließeinrichtung für Schiebetürschränke
US4061372A (en) * 1976-04-05 1977-12-06 Blomberg Glass Secondary lock for sliding door or window
DE3019918A1 (de) * 1980-05-24 1981-12-03 Telewig Weigelt GmbH & Co KG, 4520 Melle Vorrichtung zum verschliessen von schieetueren fuer kuehl-, gefrier- u.dgl. unter dem eigengewicht der schiebetuer hermetisch absperrbare raeume

Also Published As

Publication number Publication date
ATE261534T1 (de) 2004-03-15
EP0877136A3 (en) 1999-11-03
DE69822247D1 (de) 2004-04-15
EP0877136A2 (en) 1998-11-11
ITTO970384A0 (enrdf_load_stackoverflow) 1997-05-05
ITTO970384A1 (it) 1998-11-05
IT1294382B1 (it) 1999-03-24

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