WO2019111081A1 - Trolley for sliding doors - Google Patents

Trolley for sliding doors Download PDF

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Publication number
WO2019111081A1
WO2019111081A1 PCT/IB2018/059122 IB2018059122W WO2019111081A1 WO 2019111081 A1 WO2019111081 A1 WO 2019111081A1 IB 2018059122 W IB2018059122 W IB 2018059122W WO 2019111081 A1 WO2019111081 A1 WO 2019111081A1
Authority
WO
WIPO (PCT)
Prior art keywords
respect
cavity
trolley
axis
wheel
Prior art date
Application number
PCT/IB2018/059122
Other languages
French (fr)
Inventor
Stefano CAIONE
Original Assignee
Cisaplast S.P.A.
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 Cisaplast S.P.A. filed Critical Cisaplast S.P.A.
Priority to EP18812300.4A priority Critical patent/EP3721038B1/en
Publication of WO2019111081A1 publication Critical patent/WO2019111081A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E05D15/06—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
    • E05D15/0621—Details, e.g. suspension or supporting guides
    • E05D15/0626—Details, e.g. suspension or supporting guides for wings suspended at the top
    • E05D15/063—Details, e.g. suspension or supporting guides for wings suspended at the top on wheels with fixed axis
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00—Suspension arrangements for wings
    • E05D15/06—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
    • E05D15/0621—Details, e.g. suspension or supporting guides
    • E05D15/0626—Details, e.g. suspension or supporting guides for wings suspended at the top
    • E05D15/063—Details, e.g. suspension or supporting guides for wings suspended at the top on wheels with fixed axis
    • E05D15/0634—Details, e.g. suspension or supporting guides for wings suspended at the top on wheels with fixed axis with height adjustment
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/60—Suspension or transmission members; Accessories therefor
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/64—Carriers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/20—Application of doors, windows, wings or fittings thereof for furniture, e.g. cabinets
    • E05Y2900/204—Application of doors, windows, wings or fittings thereof for furniture, e.g. cabinets for display counters, e.g. for refrigerated counters

Definitions

  • the present invention relates to a trolley for sliding doors, in particular for sliding doors of gates and/or of pieces of furniture, such as for example cup boards or refrigerated display units.
  • sliding doors generally are provided with one or more trolleys which allow the door to slide along a predetermined direction by coupling to a corresponding guiding track.
  • Each of these trolleys generally comprises a body adapted to be integrally fixed to the sliding door and a plurality of wheels which are rotatably coupled to said body and which are adapted to rotate along the surfaces of the guid ing track.
  • an embodiment of the present invention makes available a trol ley for sliding doors, comprising:
  • - locking means adapted to lock the second body with respect to the first body in a plurality of different relative positions between those al lowed by the connecting means.
  • the aforesaid connecting means may be adapted to allow translational and/or rotational displacements of the second body with respect to the first body in a plane perpendicular to the rotation axis of the first wheel.
  • the connecting means may be adapted to allow rotational displacements of the second body with respect to the first body about an oscillation axis parallel and eccentric with respect to the rotation axis of the first wheel.
  • one aspect of the invention provides for the connecting means to be further adapted to allow rotational displacements of the second body with respect to the first body about an axis of revolution parallel and eccentric with respect to the oscillation axis.
  • one embodiment of the present invention provides for the connecting means to comprise:
  • One aspect of this embodiment provides for the first pin and the second pin to be made in a single body.
  • Another aspect of this embodiment provides for the connecting means to comprise a manoeuvring body integrally joined to the second pin on the op posite side with respect to the first pin and positioned outside the seat of the first body.
  • the manoeuvring body is accessible for the users who may thus ad just the position of the second body with respect to the first body by simply manually rotating the manoeuvring body.
  • the manoeuvring body may be shaped so as to radially protrude with respect to the second pin.
  • the manoeuvring body may be gripped and operated more conveniently by the users.
  • the manoeuvring body may be shaped like a disc arranged co axially with respect to the second pin.
  • the manoeuvring body substantially takes on the configuration of a knob that is easy and convenient to operate.
  • the manoeuvring body may be made in a single body with the second pin.
  • Another aspect of the invention provides for the locking means of the second body with respect to the first body to comprise a device adapted to prevent reciprocal rotations between the first body and the second body about the ax is of revolution.
  • the aforesaid device may comprise:
  • the interference member substantially serves as bolt, thus prevent ing any rotation of the second body about the axis of revolution in a simple and effective manner.
  • the first cavities may be ob tained along a perimeter edge of the manoeuvring body.
  • the first cavities take on the shape of grooves that have the advantage of also allowing an improved gripper by the users.
  • the interference member may be a screw adapted to freely pass in one between the first and the sec ond cavity and to be screwed into the other.
  • a different aspect of the invention provides for the locking means to comprise at least one device adapted to prevent reciprocal rotations between the sec- ond body and the first body about the oscillation axis.
  • said device may comprise:
  • a clamping member suitable to be inserted into the first cavity and second cavity, in order that the second body is tightened onto the first body.
  • the device effectively is capable of preventing any rotation of the second body with respect to the first body about the oscillation axis in a sim ple and effective manner.
  • the first cavity may be shaped like a circular hole.
  • the first cavity is rather simple to obtain and may also face the sec ond cavity not only for different angular positions of the second body about the oscillation axis, but also for different angular positions thereof about the axis of revolution.
  • the second cavity may be obtained in the second body coaxially to the rotation axis of the first wheel. Thanks to this solution, it advantageously is possible to obtain both the sec ond cavity and the coupling seat for the first wheel substantially with one me chanical processing operation alone, thus simplifying and speeding up the production of the second body of the trolley.
  • a further aspect of the invention provides for the clamping member to com prise a screw passing through the first cavity with clearance and having a first end screwed into the second cavity, and a ring nut having greater sizes than the first cavity and placed at the second end of the screw.
  • This aspect provides a rather simple and reliable solution for locking the sec ond body with respect to the first body in multiple angular positions about the rotation axis.
  • the ring nut may be for example, made in one piece with the screw.
  • the locking means may com prise two of the aforesaid devices adapted to prevent the reciprocal rotations between the second body and the first body about the oscillation axis, each of which may have the same features already outlined above.
  • a different aspect of the invention provides for the trolley to also comprise a second wheel, which is rotatably coupled to the second body according to a rotation axis parallel and eccentric with respect to the rotation axis of the first wheel.
  • the coupling between the trolley and the relative guid ing track advantageously is more permanent.
  • the second wheel may lie substantially coplanar to the first wheel.
  • the trolley may comprise a fur ther wheel, which is rotatably coupled to the second body according to a rota tion axis orthogonal to the rotation axis of the first wheel.
  • This further wheel has the advantage of rolling in contact with a surface of the guiding track that is substantially orthogonal to the surface on which the first wheel rotates, so that it is possible to ensure a permanent positioning of the trolley in two directions.
  • the rotation axis of said further wheel may lie in a plane which al so contains the oscillation axis of the second body with respect to first body, whereas the rotation axes of the first and second wheels may be symmetri cally arranged on opposite sides of said plane. Thanks to this solution, the arrangement of the wheels of the trolley is optimal to ensure a permanent and safe coupling of the trolley to the corresponding guiding track.
  • Figure 1 is a front view of a refrigerated display unit according to an embodi ment of the present invention.
  • Figure 2 is section ll-ll of figure 1.
  • Figure 3 is the detail III of figure 2.
  • Figure 4 is an exploded view of a trolley of a sliding door of the display unit of figure 1.
  • Figure 5 is a front view of the trolley of figure 4.
  • Figure 6 is a top view of the trolley of figure 5.
  • Figure 7 is section VII-VII of figure 5, in slightly enlarged scale.
  • Figure 8 is section VIII-VIII of figure 5, in slightly enlarged scale.
  • Figure 9 is section IX-IX of figure 5, in slightly enlarged scale.
  • Figures 1 and 2 show a sliding door system, indicated as a whole with 100, which is applied to a refrigerated display unit 105 adapted to contain com sharpal products, typically perishable food products, for allowing the opening and the subsequent closing thereof each time one of these products is to be introduced into or extracted from the display unit 105.
  • a refrigerated display unit 105 adapted to contain com sharpal products, typically perishable food products, for allowing the opening and the subsequent closing thereof each time one of these products is to be introduced into or extracted from the display unit 105.
  • the sliding door system 100 it is not excluded in other embodiments for the sliding door system 100 to be applied to non-refrigerated display units or to other types of pieces of furniture, such as for example, cupboards, nor is it excluded for it to be used to open/close a gate, for example a gate that puts two adjacent rooms of a building in communication.
  • the sliding door system 100 comprises at least one door 110, for example a panel or any other separating partition, which is adapted to close a passage, or more generally, an opening that puts an inner volume of the display unit 105 in communication with the outside.
  • the door 1 10 is adapted to slide with respect to the display unit 105 along a preset straight sliding direction A that generally is parallel to the larger faces of the door 1 10 so as to be displaced, manually or in motorized manner, be tween a first position in which it closes the aforesaid opening, and a second position in which it opens the opening.
  • the display unit 105 in the example shown comprises two doors 110, which are adapted to slide in the same sliding direction A, by overlapping each oth er during the passage between the respective closed position and the re spective open position.
  • Each door 1 10 may have a dome shape and may be clear, for example made of glass, in order to allow the products contained inside the display unit 105 to be seen also when the door 110 is in the closed position thereof.
  • the display unit 105 (or any other piece of furniture or gate to which the door 1 10 may be applied) may comprise a corresponding guiding track 1 15 that extends parallel to the sliding direction A, to allow the sliding of the door 1 10.
  • the guiding track 1 15 has a substantially L-shaped cross section that makes available two reciprocally orthogonal sliding surfac es 120 and 125.
  • the door 110 is provided with at least one trolley 130 in order to couple to the guiding track 1 15, more preferably with at least two aligned trolleys 130 spaced apart from each other (only one of which is shown in figure 3), which trolley is adapted to slide in the guiding track 1 15.
  • the trolley 130 essentially comprises two separate bod ies, of which a first body 135 adapted to be permanently fixed to the door 1 10 and a second body 140 that has at least one wheel adapted to roll in contact with one of the surfaces of the guiding track 115.
  • the trolley 130 may comprise for example, a first wheel 145 which is rotata bly coupled to the second body 140 so as to be adapted to rotate on itself about a predetermined rotation axis B.
  • This first wheel 145 may be adapted to roll in contact on the sliding surface 120 of the guiding track 1 15 (see fig. 3).
  • the rotatable coupling between the first wheel 145 and the second body 140 may be obtained by means of a support pin 150 having axis coinciding with the rotation axis B.
  • This support pin 150 may be freely inserted (preferably with small clearance) into a central hub of the first wheel 145 and may be coaxially and permanent ly fixed at a corresponding hole 155 obtained in the second body 140 (see figure 7).
  • the support pin 150 may also have an enlarged head, having greater diame ter with respect to the hub of the first wheel 145 so that the latter is axially in terposed and locked between the head of the support pin 150 and the sec ond body 140.
  • the support pin 150 is made in the shape of a screw adapted to be simply screwed into the hole 155 of the second body 140.
  • the trolley 130 may also comprise a second wheel 160, which may also be adapted to roll in contact on the sliding surface 120 of the guiding track 1 15.
  • the second wheel 160 is rotatably coupled to the second body 140 so as to rotate on itself about a predetermined rotation axis C, which preferably is parallel to and spaced apart from, that is eccentric, or better yet offset, with respect to the rotation axis B of the first wheel 145.
  • the second wheel 160 has the same outer diameter as the first wheel 145 and may lie coplanar to the latter so that the first and the second wheels 145 and 160 substantially are aligned with each other.
  • the rotatable coupling between the second wheel 160 and the second body 140 may be obtained with similar methods to the first wheel 145, i.e. by means of a support pin 165 having axis coinciding with the rotation axis C, which may be freely inserted (preferably with small clearance) into a central hub of the second wheel 160 and may be coaxially and permanently fixed at a corresponding hole 170 obtained in the second body 140 (see fig. 7).
  • the support pin 165 which may be made in the form of a screw adapted to be screwed into the hole 170, may also have an enlarged head having great- er diameter with respect to the hub of the second wheel 160 so that the latter is axially interposed and locked between the head of the support pin 165 and the second body 140.
  • the trolley 130 may comprise a third wheel 175, which may be adapted to roll in contact on the sliding surface 125 of the guiding track 1 15 (see fig. 3).
  • the rotation axis D of the third wheel 175 may lie in a reference plane Q which is parallel to the rotation axis B of the first wheel 145 but which is spaced apart therefrom (see fig. 7).
  • the rotation axis B of the first wheel 145 may be arranged on the opposite side of the reference plane Q with respect to the rotation axis C of the second wheel 160, and preferably at the same distance.
  • the reference plane Q defined by the rotation axis D may also be orthogonal to the plane Q’ containing both the rotation axes B and C of the first and sec ond wheels 145 and 160, which may therefore be arranged substantially in symmetrical manner (see fig. 5).
  • the third wheel 175 lies on a plane parallel to and spaced apart with respect to the plane Q’ containing the rotation axes B and C.
  • the rotatable coupling between the third wheel 175 and the second body 140 may be obtained by means of a support pin 180 having axis coinciding with the rotation axis D, which may be freely in serted (preferably with small clearance) into a central hub of the third wheel 175 and may be coaxially and permanently fixed at a corresponding hole 185 obtained in the second body 140.
  • the support pin 180 which may be made in the form of a screw adapted to be screwed into the hole 185, may also have an enlarged head having great er diameter with respect to the one of the hub of the third wheel 175 so that the latter is axially interposed and locked between the head of the support pin 180 and the second body 140.
  • the second body 140 may have a rear flat surface 190, which substantially is orthogonal to the rotation axis B of the first wheel 145 and is adapted to rest coplanar in contact on a corresponding front flat sur face 195 of the first body 135 (see also figures 7 to 9).
  • the first body 135 may also comprise a rear flat surface 200, which prefera bly is parallel to the front flat surface 195 so that the first body 135 substan tially has the shape of a plate between the two front 195 and rear 200 flat surfaces.
  • This plate may be firmly joined to a base flange 205, which preferably is or thogonal to the front flat surface 195 and is adapted to be fixed - for example by bolting - to the door 1 10 to which the trolley 130 is to be applied (see fig. 3).
  • the plate and the base flange 205 may be made in a single body.
  • the first and the second bodies 135 and 140 are reciprocally connected by means of connecting means configured so as to allow the second body 140 to perform rotational and/or translational displacements while remaining in contact on the front flat surface 195 of the first body 135.
  • the connecting means may be configured to allow the second body 140 to perform rotational displacements with respect to the first body 135 by rotating about an oscillation axis E, which preferably is parallel to, but spaced apart from, that is eccentric or more precisely offset, with respect to the rotation axis B of the first wheel 145 (see fig. 5).
  • the oscillation axis E may lie in the reference plane Q defined previously with reference to the rotation axis D of the third wheel 175 and preferably close to the plane Q’ in which both the rotation axes B and C of the first and second wheels 145 and 160 lie.
  • the connecting means may comprise a seat 210, for example a cylindrical hole, which may be obtained in the second body 140, for example in the rear flat surface 190, with longitudinal axis coinciding with the oscillation axis E, and a first pin 215, for example a cylindrical section pin, which may protrude from the first body 135, for example from the front flat surface 195, and is adapted to be coaxially and rotatably inserted into the corresponding seat 210 so as to define, with the latter, a rotary torque having rotation axis coin ciding with the oscillation axis E.
  • a seat 210 for example a cylindrical hole, which may be obtained in the second body 140, for example in the rear flat surface 190, with longitudinal axis coinciding with the oscillation axis E
  • a first pin 215, for example a cylindrical section pin which may protrude from the first body 135, for example from the front flat surface 195, and is adapted to be coaxially and rotatably inserted into the corresponding seat
  • the connecting means may also be configured to allow the second body 140 - and with it also the corresponding oscillation axis E - to perform further rota tional displacements with respect to the first body 135 by rotating about an axis of revolution F, which preferably is parallel to, but spaced apart from, that is eccentric or more precisely offset, with respect to the oscillation axis E (see figures 5 and 9).
  • the connecting means may comprise a seat 220, for example a cylindrical hole, preferably a through hole, which may be obtained in the first body 135, for example in the front flat surface 195, with longitudinal axis coinciding with the axis of revolution F, and a second pin 225, for example a cylindrical section pin, which is integral ly joined to an end of the first pin 215 and, protruding from the second body 140, for example from the rear flat surface 190, is adapted to be coaxially and rotatably inserted into the corresponding seat 220 so as to define, with the latter, a rotary torque having rotation axis coinciding with the axis of revo lution F.
  • a seat 220 for example a cylindrical hole, preferably a through hole, which may be obtained in the first body 135, for example in the front flat surface 195, with longitudinal axis coinciding with the axis of revolution F
  • a second pin 225 for example a cylindrical section pin, which is integral ly joined to an end
  • first and the second pins 215 and 225 may be made in a single body so as to obtain a single monolithic component that extends be tween the first and the second bodies 135 and 140.
  • the outer diameter of one of the two pins in the example of the second pin 225 may be greater than the outer diameter of the other pin in the example of the first pin 215, and the difference between these two diameters preferably is equal to or greater than twice the distance that separates the axis of revo lution F from the oscillation axis E.
  • first pin 215 it is important for the first pin 215 to be parallel and eccentric with respect to the second pin 225 so that any rotation of the latter about the axis of revolution F results in a corresponding revolu tion displacement of the second body 140 and also of the relative oscillation axis E.
  • the connecting means may further comprise a manoeuvring body 230, which is firmly joined to the end of the second pin 225, opposite to the first pin 215, so as to be positioned outside the seat 220 of the first body 135, protruding axially with respect to the rear flat surface 200 (see fig. 9).
  • the manoeuvring body 230 may be made in a single body with the second pin 225.
  • the manoeuvring body 230 may be shaped like a disc, which may be arranged coaxially and may have a greater diameter with respect to the second pin 225 so as to protrude radially with respect to the latter and di rectly face onto the rear flat surface 200 of the first body 135.
  • These two bodies are to be permanently locked in the predetermined position after adjusting the position of the second body 140 with respect to the first body 135 using the above-described levels of freedom.
  • the trolley 130 generally is provided with locking means which are adapted to lock the second body 140 with respect to the first body 135 in a plurality of different relative positions between those al lowed by the connecting means.
  • the aforesaid locking means may comprise (see fig. 4) a plurality of first cavities 235 obtained in the manoeuvring body 230 at eccentric position with respect to the axis of revolution F, at least one second cavity 240 obtained in the first body 135 in such position as to be aligned with each of the first cavities 235 following the rotation of the second pin 225 about the axis of revolution F, and finally an in- terference member 245 adapted to be inserted into the second cavity 240 and the first cavity 235 aligned therewith.
  • the second cavity is made in the form of a hole with axis parallel to the axis of revolution F, which may be obtained on the rear surface 200 of the first body 135 that faces the manoeuvring body 230, while the first cavities 235 are obtained along the perimeter edge of the manoeuvring body 230, preferably in the form of slots with open profile or grooves.
  • the first cavities 235 are obtained in the form of through holes distributed along a circumference centred in the axis of revolution F.
  • the interference member 245 may be a screw that is inserted simultaneously into the second cavity 240 and into the first cavity 235 aligned thereto, for ex ample a screw that passes freely in the first cavity 235 and is screwed into the second cavity 240 or vice versa.
  • first cavi ties 235 could be obtained in the first body 135 while the second cavity 240 could be obtained in the manoeuvring body 230.
  • the manoeuvring body 230 could comprise a single slot or groove adapted to face a plurality of holes distributed about the axis of revo lution F and obtained in the first body 135, for example on the rear flat sur face 200, following the rotation of the second pin 225 about the axis of revo lution F.
  • the locking means may further comprise at least one device or more prefer ably, two devices which are individually adapted to lock the first and the sec ond bodies 135 and 140 with respect to the rotations about the oscillation ax is E.
  • each of these devices may comprise a first cavity 250 obtained in the first body 135 at eccentric position with respect to the oscillation axis E, and a second cavity 255 obtained in the second body 140, which has smaller sizes with respect to the first cavity 250 and is adapted to face the latter for various angular positions of the second body 140 about the oscillation axis E, and a clamping member 260 adapted to be inserted into said first cavity 250 and into said second cavity 255, when they are reciprocally facing each other, to tighten the second body 140 on the first body 135.
  • the first cavity 250 may be shaped like a through hole, for example having circular shape, which may be obtained between the front flat surface 195 and the rear flat surface 200 of the first body 135, while the second cavity 255 may be shaped like a hole obtained in the second body 140, for example at the rear flat surface 190.
  • the second cavity 255 may possibly be partially delimited by a bushing 265, which may protrude axially from the rear flat surface 190 of the second body 140 so as to also be adapted to be inserted into the first cavity 250.
  • the outer diameter of the bushing 265 is less than the inner diameter of the first cavity 250 so as to ensure a sufficient clearance so that the second body 140 may be displaced with respect to the first body 135.
  • the clamping member 260 may comprise a screw, which passes through the first cavity 250 with ample clearance and has a first end screwed into the second cavity 255, and a ring nut 270 having greater sizes than the first cavi ty 250, which is placed at the second end of the screw to which it is con strained at least in axial direction.
  • the ring nut 270 may be a disc having larger diameter with re spect to the first cavity 250 and may possibly be made in a single body with the screw.
  • the second cavity 255 of each of the above-described devices may be arranged coaxial to and possibly communicating respectively with the hole 155 in which the support pin 150 of the first wheel 145 engages and with the hole 170 in which the support pin 165 of the second wheel 160 engages so that each of the pairs of these cavities may be obtained substantially with a single mechanical processing operation, thus simplifying the manufacturing of the second body 140.

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  • Mechanical Engineering (AREA)
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Abstract

A trolley (130) for sliding doors (110) is described, comprising: a first body (135) adapted to be permanently fixed to a sliding door (110), a second body (140), at least one first wheel (145) rotatably coupled to the second body (140) according to a predetermined rotation axis (B), connecting means adapted to allow relative displacements of the second body (140) with respect to the first body (135), and locking means adapted to lock the second body (140) with respect to the first body (135) in a plurality of different relative positions between those allowed by the connecting means.

Description

TROLLEY FOR SLIDING DOORS
Technical field
The present invention relates to a trolley for sliding doors, in particular for sliding doors of gates and/or of pieces of furniture, such as for example cup boards or refrigerated display units.
Background art
As is known, sliding doors generally are provided with one or more trolleys which allow the door to slide along a predetermined direction by coupling to a corresponding guiding track.
Each of these trolleys generally comprises a body adapted to be integrally fixed to the sliding door and a plurality of wheels which are rotatably coupled to said body and which are adapted to rotate along the surfaces of the guid ing track.
Although this is a consolidated solution, it has the drawback that small mounting and/or manufacturing errors of the trolleys and/or of the guiding track may cause an imperfect coupling of these components, with the conse quence that the sliding door may take on an incorrect position that worsens the exterior aspect of the gate or of the piece of furniture to which it is ap plied, and which at times may limit the functionality thereof.
Description of the invention
In light of that disclosed above, it is an object of the present invention to overcome, or at least mitigate, the mentioned drawbacks of the known tech nique, preferably within the context of a simple and rational solution and at a contained cost.
These and other objects are achieved thanks to the characteristics of the in vention as set forth in the independent claim 1. The dependent claims in stead simply outline preferred or particularly advantageous aspects of the in vention.
In particular, an embodiment of the present invention makes available a trol ley for sliding doors, comprising:
- a first body adapted to be permanently fixed to a sliding door,
- a second body, - at least one first wheel rotatably coupled to the second body according to a predetermined rotation axis,
- connecting means adapted to allow relative displacements of the sec ond body with respect to the first body, and
- locking means adapted to lock the second body with respect to the first body in a plurality of different relative positions between those al lowed by the connecting means.
Thanks to this solution, it advantageously is possible to adjust the position of the wheel(s) with respect to the body of the trolley, thus compensating for any coupling errors that could arise between the trolley itself and the corre sponding guiding track, and therefore ensuring the correct positioning and operation of the sliding door.
According to one aspect of the present invention, the aforesaid connecting means may be adapted to allow translational and/or rotational displacements of the second body with respect to the first body in a plane perpendicular to the rotation axis of the first wheel.
Thereby, it advantageously is possible to adjust the position of the wheel(s) without modifying the lying plane thereof.
According to another aspect of the invention, the connecting means may be adapted to allow rotational displacements of the second body with respect to the first body about an oscillation axis parallel and eccentric with respect to the rotation axis of the first wheel.
Thanks to this solution, it advantageously is possible to adjust the position of the wheel(s) by varying the orientation of the second body with respect to the first body.
In this context, one aspect of the invention provides for the connecting means to be further adapted to allow rotational displacements of the second body with respect to the first body about an axis of revolution parallel and eccentric with respect to the oscillation axis.
This solution has the advantage of significantly increasing the possibility of adjusting the relative position of the second body with respect to the first body. In greater detail, one embodiment of the present invention provides for the connecting means to comprise:
- a first pin rotatably received inside a corresponding seat of the second body thus forming a rotary torque therewith having a rotation axis co inciding with the oscillation axis, and
- a second pin integrally joined to the first pin and rotatably received in side a corresponding seat of the first body thus forming a rotary torque therewith having a rotation axis coinciding with the axis of revolution.
Thereby, a rather simple solution advantageously is provided to achieve the envisaged levels of freedom between the second body and the first body of the trolley.
One aspect of this embodiment provides for the first pin and the second pin to be made in a single body.
This solution allows simplifying making and mounting the connecting means. Another aspect of this embodiment provides for the connecting means to comprise a manoeuvring body integrally joined to the second pin on the op posite side with respect to the first pin and positioned outside the seat of the first body.
Thereby, the manoeuvring body is accessible for the users who may thus ad just the position of the second body with respect to the first body by simply manually rotating the manoeuvring body.
According to one aspect of this embodiment, the manoeuvring body may be shaped so as to radially protrude with respect to the second pin.
Thanks to this solution, the manoeuvring body may be gripped and operated more conveniently by the users.
For example, the manoeuvring body may be shaped like a disc arranged co axially with respect to the second pin.
Thereby, the manoeuvring body substantially takes on the configuration of a knob that is easy and convenient to operate.
According to a further aspect of this embodiment, the manoeuvring body may be made in a single body with the second pin.
This solution allows simplifying making and mounting the connecting means. Another aspect of the invention provides for the locking means of the second body with respect to the first body to comprise a device adapted to prevent reciprocal rotations between the first body and the second body about the ax is of revolution.
Thanks to this solution, it advantageously is possible to keep the second body locked with respect to the first body in a desired angular position with respect to the axis of revolution.
For example, the aforesaid device may comprise:
- a plurality of first cavities obtained in one between the manoeuvring body and the first body in an eccentric position with respect to the axis of revolution,
- a second cavity obtained in the other one between the manoeuvring body and the first body, which is positioned so as to align with each of the first cavities following the rotation of the second pin about the axis of revolution, and
- an interference member adapted to be inserted inside the second cavity and the first cavity aligned thereto.
Thereby, the interference member substantially serves as bolt, thus prevent ing any rotation of the second body about the axis of revolution in a simple and effective manner.
According to one aspect of this embodiment, the first cavities may be ob tained along a perimeter edge of the manoeuvring body.
Thanks to this solution, the first cavities take on the shape of grooves that have the advantage of also allowing an improved gripper by the users.
According to another aspect of this embodiment, the interference member may be a screw adapted to freely pass in one between the first and the sec ond cavity and to be screwed into the other.
Thereby, it advantageously is ensured that the interference member remains stopped in the position in which it locks the rotations of the second body with respect to the axis of revolution.
A different aspect of the invention provides for the locking means to comprise at least one device adapted to prevent reciprocal rotations between the sec- ond body and the first body about the oscillation axis.
Thanks to this solution, it advantageously is possible to keep the second body locked with respect to the first body, in a desired angular position with respect to the oscillation axis.
For example, said device may comprise:
- a first cavity obtained in the first body in an eccentric position with re spect to the oscillation axis,
- a second cavity obtained in the second body, which exhibits smaller sizes than the first cavity and is adapted to face the latter for different angular positions of the second body with respect to the first body about the oscillation axis, and
- a clamping member suitable to be inserted into the first cavity and second cavity, in order that the second body is tightened onto the first body.
Thereby, the device effectively is capable of preventing any rotation of the second body with respect to the first body about the oscillation axis in a sim ple and effective manner.
According to one aspect of this embodiment, the first cavity may be shaped like a circular hole.
Thereby, the first cavity is rather simple to obtain and may also face the sec ond cavity not only for different angular positions of the second body about the oscillation axis, but also for different angular positions thereof about the axis of revolution.
According to another aspect of this embodiment, the second cavity may be obtained in the second body coaxially to the rotation axis of the first wheel. Thanks to this solution, it advantageously is possible to obtain both the sec ond cavity and the coupling seat for the first wheel substantially with one me chanical processing operation alone, thus simplifying and speeding up the production of the second body of the trolley.
A further aspect of the invention provides for the clamping member to com prise a screw passing through the first cavity with clearance and having a first end screwed into the second cavity, and a ring nut having greater sizes than the first cavity and placed at the second end of the screw.
This aspect provides a rather simple and reliable solution for locking the sec ond body with respect to the first body in multiple angular positions about the rotation axis.
In this context, the ring nut may be for example, made in one piece with the screw.
This solution allows simplifying making and mounting the constraining means.
According to another aspect of the invention, the locking means may com prise two of the aforesaid devices adapted to prevent the reciprocal rotations between the second body and the first body about the oscillation axis, each of which may have the same features already outlined above.
Thereby, it advantageously is possible to make the locking of the second body more permanent with respect to the first body.
A different aspect of the invention provides for the trolley to also comprise a second wheel, which is rotatably coupled to the second body according to a rotation axis parallel and eccentric with respect to the rotation axis of the first wheel.
Thanks to this solution, the coupling between the trolley and the relative guid ing track advantageously is more permanent.
Preferably, the second wheel may lie substantially coplanar to the first wheel. According to another aspect of the invention, the trolley may comprise a fur ther wheel, which is rotatably coupled to the second body according to a rota tion axis orthogonal to the rotation axis of the first wheel.
This further wheel has the advantage of rolling in contact with a surface of the guiding track that is substantially orthogonal to the surface on which the first wheel rotates, so that it is possible to ensure a permanent positioning of the trolley in two directions.
Preferably, the rotation axis of said further wheel may lie in a plane which al so contains the oscillation axis of the second body with respect to first body, whereas the rotation axes of the first and second wheels may be symmetri cally arranged on opposite sides of said plane. Thanks to this solution, the arrangement of the wheels of the trolley is optimal to ensure a permanent and safe coupling of the trolley to the corresponding guiding track.
Brief description of the drawings
Further features and advantages of the invention will be more apparent after reading the following description provided by way of a non-limiting example, with the aid of the accompanying drawings.
Figure 1 is a front view of a refrigerated display unit according to an embodi ment of the present invention.
Figure 2 is section ll-ll of figure 1.
Figure 3 is the detail III of figure 2.
Figure 4 is an exploded view of a trolley of a sliding door of the display unit of figure 1.
Figure 5 is a front view of the trolley of figure 4.
Figure 6 is a top view of the trolley of figure 5.
Figure 7 is section VII-VII of figure 5, in slightly enlarged scale.
Figure 8 is section VIII-VIII of figure 5, in slightly enlarged scale.
Figure 9 is section IX-IX of figure 5, in slightly enlarged scale.
Detailed description
Figures 1 and 2 show a sliding door system, indicated as a whole with 100, which is applied to a refrigerated display unit 105 adapted to contain com mercial products, typically perishable food products, for allowing the opening and the subsequent closing thereof each time one of these products is to be introduced into or extracted from the display unit 105.
Flowever, it is not excluded in other embodiments for the sliding door system 100 to be applied to non-refrigerated display units or to other types of pieces of furniture, such as for example, cupboards, nor is it excluded for it to be used to open/close a gate, for example a gate that puts two adjacent rooms of a building in communication.
The sliding door system 100 comprises at least one door 110, for example a panel or any other separating partition, which is adapted to close a passage, or more generally, an opening that puts an inner volume of the display unit 105 in communication with the outside.
The door 1 10 is adapted to slide with respect to the display unit 105 along a preset straight sliding direction A that generally is parallel to the larger faces of the door 1 10 so as to be displaced, manually or in motorized manner, be tween a first position in which it closes the aforesaid opening, and a second position in which it opens the opening.
The display unit 105 in the example shown comprises two doors 110, which are adapted to slide in the same sliding direction A, by overlapping each oth er during the passage between the respective closed position and the re spective open position.
Each door 1 10 may have a dome shape and may be clear, for example made of glass, in order to allow the products contained inside the display unit 105 to be seen also when the door 110 is in the closed position thereof.
As shown in figure 3, the display unit 105 (or any other piece of furniture or gate to which the door 1 10 may be applied) may comprise a corresponding guiding track 1 15 that extends parallel to the sliding direction A, to allow the sliding of the door 1 10.
In the example illustrated, the guiding track 1 15 has a substantially L-shaped cross section that makes available two reciprocally orthogonal sliding surfac es 120 and 125.
The door 110 is provided with at least one trolley 130 in order to couple to the guiding track 1 15, more preferably with at least two aligned trolleys 130 spaced apart from each other (only one of which is shown in figure 3), which trolley is adapted to slide in the guiding track 1 15.
As shown in figure 4, the trolley 130 essentially comprises two separate bod ies, of which a first body 135 adapted to be permanently fixed to the door 1 10 and a second body 140 that has at least one wheel adapted to roll in contact with one of the surfaces of the guiding track 115.
The trolley 130 may comprise for example, a first wheel 145 which is rotata bly coupled to the second body 140 so as to be adapted to rotate on itself about a predetermined rotation axis B.
This first wheel 145 may be adapted to roll in contact on the sliding surface 120 of the guiding track 1 15 (see fig. 3).
The rotatable coupling between the first wheel 145 and the second body 140 may be obtained by means of a support pin 150 having axis coinciding with the rotation axis B.
This support pin 150 may be freely inserted (preferably with small clearance) into a central hub of the first wheel 145 and may be coaxially and permanent ly fixed at a corresponding hole 155 obtained in the second body 140 (see figure 7).
The support pin 150 may also have an enlarged head, having greater diame ter with respect to the hub of the first wheel 145 so that the latter is axially in terposed and locked between the head of the support pin 150 and the sec ond body 140.
In the specific example illustrated, the support pin 150 is made in the shape of a screw adapted to be simply screwed into the hole 155 of the second body 140.
The trolley 130 may also comprise a second wheel 160, which may also be adapted to roll in contact on the sliding surface 120 of the guiding track 1 15. The second wheel 160 is rotatably coupled to the second body 140 so as to rotate on itself about a predetermined rotation axis C, which preferably is parallel to and spaced apart from, that is eccentric, or better yet offset, with respect to the rotation axis B of the first wheel 145.
Preferably, the second wheel 160 has the same outer diameter as the first wheel 145 and may lie coplanar to the latter so that the first and the second wheels 145 and 160 substantially are aligned with each other.
The rotatable coupling between the second wheel 160 and the second body 140 may be obtained with similar methods to the first wheel 145, i.e. by means of a support pin 165 having axis coinciding with the rotation axis C, which may be freely inserted (preferably with small clearance) into a central hub of the second wheel 160 and may be coaxially and permanently fixed at a corresponding hole 170 obtained in the second body 140 (see fig. 7).
The support pin 165, which may be made in the form of a screw adapted to be screwed into the hole 170, may also have an enlarged head having great- er diameter with respect to the hub of the second wheel 160 so that the latter is axially interposed and locked between the head of the support pin 165 and the second body 140.
Finally, the trolley 130 may comprise a third wheel 175, which may be adapted to roll in contact on the sliding surface 125 of the guiding track 1 15 (see fig. 3).
The third wheel 175, which may have the same outer diameter as the first wheel 145, is rotatably coupled to the second body 140 so as to be adapted to rotate on itself about a predetermined rotation axis D, which is orthogonal and preferably not coplanar with respect to the rotation axis B of the first wheel 145.
For example, the rotation axis D of the third wheel 175 may lie in a reference plane Q which is parallel to the rotation axis B of the first wheel 145 but which is spaced apart therefrom (see fig. 7).
In particular, the rotation axis B of the first wheel 145 may be arranged on the opposite side of the reference plane Q with respect to the rotation axis C of the second wheel 160, and preferably at the same distance.
The reference plane Q defined by the rotation axis D may also be orthogonal to the plane Q’ containing both the rotation axes B and C of the first and sec ond wheels 145 and 160, which may therefore be arranged substantially in symmetrical manner (see fig. 5).
Preferably, the third wheel 175 lies on a plane parallel to and spaced apart with respect to the plane Q’ containing the rotation axes B and C.
As in the preceding cases, the rotatable coupling between the third wheel 175 and the second body 140 may be obtained by means of a support pin 180 having axis coinciding with the rotation axis D, which may be freely in serted (preferably with small clearance) into a central hub of the third wheel 175 and may be coaxially and permanently fixed at a corresponding hole 185 obtained in the second body 140.
The support pin 180, which may be made in the form of a screw adapted to be screwed into the hole 185, may also have an enlarged head having great er diameter with respect to the one of the hub of the third wheel 175 so that the latter is axially interposed and locked between the head of the support pin 180 and the second body 140.
As shown in figure 4, the second body 140 may have a rear flat surface 190, which substantially is orthogonal to the rotation axis B of the first wheel 145 and is adapted to rest coplanar in contact on a corresponding front flat sur face 195 of the first body 135 (see also figures 7 to 9).
The first body 135 may also comprise a rear flat surface 200, which prefera bly is parallel to the front flat surface 195 so that the first body 135 substan tially has the shape of a plate between the two front 195 and rear 200 flat surfaces.
This plate may be firmly joined to a base flange 205, which preferably is or thogonal to the front flat surface 195 and is adapted to be fixed - for example by bolting - to the door 1 10 to which the trolley 130 is to be applied (see fig. 3).
For example, the plate and the base flange 205 may be made in a single body.
The first and the second bodies 135 and 140 are reciprocally connected by means of connecting means configured so as to allow the second body 140 to perform rotational and/or translational displacements while remaining in contact on the front flat surface 195 of the first body 135.
Thanks to this solution, it indeed advantageously is possible to vary the recip rocal position between the first and the second bodies 135 and 140 and therefore the relative position of the wheel(s) 145, 160 and 175 with respect to the door 110 to which the trolley 130 is fixed.
For example, the connecting means may be configured to allow the second body 140 to perform rotational displacements with respect to the first body 135 by rotating about an oscillation axis E, which preferably is parallel to, but spaced apart from, that is eccentric or more precisely offset, with respect to the rotation axis B of the first wheel 145 (see fig. 5).
In particular, the oscillation axis E may lie in the reference plane Q defined previously with reference to the rotation axis D of the third wheel 175 and preferably close to the plane Q’ in which both the rotation axes B and C of the first and second wheels 145 and 160 lie.
As illustrated in figures 4 and 9, to achieve this level of rotational freedom, the connecting means may comprise a seat 210, for example a cylindrical hole, which may be obtained in the second body 140, for example in the rear flat surface 190, with longitudinal axis coinciding with the oscillation axis E, and a first pin 215, for example a cylindrical section pin, which may protrude from the first body 135, for example from the front flat surface 195, and is adapted to be coaxially and rotatably inserted into the corresponding seat 210 so as to define, with the latter, a rotary torque having rotation axis coin ciding with the oscillation axis E.
The connecting means may also be configured to allow the second body 140 - and with it also the corresponding oscillation axis E - to perform further rota tional displacements with respect to the first body 135 by rotating about an axis of revolution F, which preferably is parallel to, but spaced apart from, that is eccentric or more precisely offset, with respect to the oscillation axis E (see figures 5 and 9).
To achieve this further level of rotational freedom, the connecting means may comprise a seat 220, for example a cylindrical hole, preferably a through hole, which may be obtained in the first body 135, for example in the front flat surface 195, with longitudinal axis coinciding with the axis of revolution F, and a second pin 225, for example a cylindrical section pin, which is integral ly joined to an end of the first pin 215 and, protruding from the second body 140, for example from the rear flat surface 190, is adapted to be coaxially and rotatably inserted into the corresponding seat 220 so as to define, with the latter, a rotary torque having rotation axis coinciding with the axis of revo lution F.
For example, the first and the second pins 215 and 225 may be made in a single body so as to obtain a single monolithic component that extends be tween the first and the second bodies 135 and 140.
The outer diameter of one of the two pins in the example of the second pin 225 may be greater than the outer diameter of the other pin in the example of the first pin 215, and the difference between these two diameters preferably is equal to or greater than twice the distance that separates the axis of revo lution F from the oscillation axis E.
Regardless of these considerations, it is important for the first pin 215 to be parallel and eccentric with respect to the second pin 225 so that any rotation of the latter about the axis of revolution F results in a corresponding revolu tion displacement of the second body 140 and also of the relative oscillation axis E.
To activate this revolution displacement, the connecting means may further comprise a manoeuvring body 230, which is firmly joined to the end of the second pin 225, opposite to the first pin 215, so as to be positioned outside the seat 220 of the first body 135, protruding axially with respect to the rear flat surface 200 (see fig. 9).
The manoeuvring body 230 may be made in a single body with the second pin 225.
For example, the manoeuvring body 230 may be shaped like a disc, which may be arranged coaxially and may have a greater diameter with respect to the second pin 225 so as to protrude radially with respect to the latter and di rectly face onto the rear flat surface 200 of the first body 135.
These two bodies are to be permanently locked in the predetermined position after adjusting the position of the second body 140 with respect to the first body 135 using the above-described levels of freedom.
To achieve this effect, the trolley 130 generally is provided with locking means which are adapted to lock the second body 140 with respect to the first body 135 in a plurality of different relative positions between those al lowed by the connecting means.
For example, to lock the first and the second bodies 135 and 140 with re spect to the rotations about the axis of revolution F, the aforesaid locking means may comprise (see fig. 4) a plurality of first cavities 235 obtained in the manoeuvring body 230 at eccentric position with respect to the axis of revolution F, at least one second cavity 240 obtained in the first body 135 in such position as to be aligned with each of the first cavities 235 following the rotation of the second pin 225 about the axis of revolution F, and finally an in- terference member 245 adapted to be inserted into the second cavity 240 and the first cavity 235 aligned therewith.
In the example illustrated, the second cavity is made in the form of a hole with axis parallel to the axis of revolution F, which may be obtained on the rear surface 200 of the first body 135 that faces the manoeuvring body 230, while the first cavities 235 are obtained along the perimeter edge of the manoeuvring body 230, preferably in the form of slots with open profile or grooves.
However, it is not excluded in other embodiments for the first cavities 235 to be obtained in the form of through holes distributed along a circumference centred in the axis of revolution F.
The interference member 245 may be a screw that is inserted simultaneously into the second cavity 240 and into the first cavity 235 aligned thereto, for ex ample a screw that passes freely in the first cavity 235 and is screwed into the second cavity 240 or vice versa.
It is worth noting that alternatively to what is described above, the first cavi ties 235 could be obtained in the first body 135 while the second cavity 240 could be obtained in the manoeuvring body 230.
For example, the manoeuvring body 230 could comprise a single slot or groove adapted to face a plurality of holes distributed about the axis of revo lution F and obtained in the first body 135, for example on the rear flat sur face 200, following the rotation of the second pin 225 about the axis of revo lution F.
The locking means may further comprise at least one device or more prefer ably, two devices which are individually adapted to lock the first and the sec ond bodies 135 and 140 with respect to the rotations about the oscillation ax is E.
As illustrated in figures 4 and 7, each of these devices may comprise a first cavity 250 obtained in the first body 135 at eccentric position with respect to the oscillation axis E, and a second cavity 255 obtained in the second body 140, which has smaller sizes with respect to the first cavity 250 and is adapted to face the latter for various angular positions of the second body 140 about the oscillation axis E, and a clamping member 260 adapted to be inserted into said first cavity 250 and into said second cavity 255, when they are reciprocally facing each other, to tighten the second body 140 on the first body 135.
In the example illustrated, the first cavity 250 may be shaped like a through hole, for example having circular shape, which may be obtained between the front flat surface 195 and the rear flat surface 200 of the first body 135, while the second cavity 255 may be shaped like a hole obtained in the second body 140, for example at the rear flat surface 190.
The second cavity 255 may possibly be partially delimited by a bushing 265, which may protrude axially from the rear flat surface 190 of the second body 140 so as to also be adapted to be inserted into the first cavity 250.
The outer diameter of the bushing 265 is less than the inner diameter of the first cavity 250 so as to ensure a sufficient clearance so that the second body 140 may be displaced with respect to the first body 135.
The clamping member 260 may comprise a screw, which passes through the first cavity 250 with ample clearance and has a first end screwed into the second cavity 255, and a ring nut 270 having greater sizes than the first cavi ty 250, which is placed at the second end of the screw to which it is con strained at least in axial direction.
For example, the ring nut 270 may be a disc having larger diameter with re spect to the first cavity 250 and may possibly be made in a single body with the screw.
Thereby, by tightening the screw in the second cavity 255, the first body 135 is clamped between the ring nut 270 and the second body 140, which is therefore prevented from being displaced due to the effect of the friction gen erated between the rear flat surface 190 of the second body 140 and the front flat surface of the first body 135.
Preferably, the second cavity 255 of each of the above-described devices may be arranged coaxial to and possibly communicating respectively with the hole 155 in which the support pin 150 of the first wheel 145 engages and with the hole 170 in which the support pin 165 of the second wheel 160 engages so that each of the pairs of these cavities may be obtained substantially with a single mechanical processing operation, thus simplifying the manufacturing of the second body 140.
Obviously, an expert in the field may make several technical-applicative mod ifications to all that above, without departing from the scope of the invention as hereinbelow claimed.

Claims

1. A trolley (130) for sliding doors (1 10), comprising:
- a first body (135) adapted to be permanently fixed to a sliding door
(1 10),
- a second body (140),
- at least one first wheel (145) rotatably coupled to the second body (140) according to a predetermined rotation axis (B),
- connecting means adapted to allow relative displacements of the sec ond body (140) with respect to the first body (135), and
- locking means adapted to lock the second body (140) with respect to the first body (135) in a plurality of different relative positions between those allowed by the connecting means.
2. A trolley (130) according to claim 1 , wherein the connecting means are adapted to allow translational and/or rotational displacements of the second body (140) with respect to the first body (135) in a plane perpendicular to the rotation axis (B) of the first wheel (145).
3. A trolley (130) according to any one of the preceding claims, wherein the connecting means are adapted to allow rotational displacements of the second body (140) with respect to the first body (135) about an oscillation ax is (E) parallel and eccentric with respect to the rotation axis (B) of the first wheel (145).
4. A trolley (130) according to claim 3, wherein the connecting means are further adapted to allow rotational displacements of the second body (140) with respect to the first body (135) about an axis of revolution (F) parallel and eccentric with respect to the oscillation axis (E).
5. A trolley (130) according to claim 4, wherein the connecting means comprises:
- a first pin (215) rotatably received inside a corresponding seat (210) of the second body (140) thus forming a rotary torque therewith having a rotation axis coinciding with the oscillation axis (E), and
- a second pin (225) integrally joined to the first pin (215) and rotatably received inside a corresponding seat (220) of the first body (135) thus forming a rotary torque therewith having a rotation axis coinciding with the axis of revolution (F).
6. A trolley (130) according to claim 5, wherein the connecting means comprises a manoeuvring body (230) integrally joined to the second pin (225) on the opposite side with respect to the first pin (215) and positioned outside the seat (220) of the first body (135).
7. A trolley (130) according to claim 6, characterized in that the locking means comprises:
- a plurality of first cavities (235) obtained in one between the manoeu vring body (230) and the first body (135) in an eccentric position with respect to the axis of revolution (F),
- a second cavity (240) obtained in the other one between the manoeu vring body (230) and the first body (135), which is so positioned as to align with each of the first cavities (235) following rotation of the sec ond pin (225) about the axis of revolution (F), and
- an interference member (245) adapted to be inserted inside the sec ond cavity (240) and the first cavity (235) aligned thereto.
8. A trolley (130) according to any one of claims from 3 to 7, wherein the locking means comprises at least one device able to prevent reciprocal rota tions between the second body and the first body about the oscillation axis, said device comprising:
- a first cavity (250) obtained in the first body (135) in an eccentric posi tion with respect to the oscillation axis (E),
- a second cavity (255) obtained in the second body (140), which exhib its smaller sizes than the first cavity (250) and is adapted to face the latter for different angular positions of the second body (140) with re spect to the first body (135) about the oscillation axis (E), and
- a clamping member (260) suitable to be inserted into the first cavity (250) and second cavity (255), in order that the second body (140) is tightened onto the first body (135).
9. A trolley (130) according to claim 8, wherein the second cavity (255) is obtained in the second body coaxially with the rotation axis (B) of the first wheel (145).
10. A trolley (130) according to claim 8 or 9, wherein the clamping member (260) comprises a screw passing through the first cavity (250) with clearance and having a first end screwed into the second cavity (255), and a ring nut (270) having greater sizes than the first cavity (250) and placed at the second end of the screw.
11. A trolley (130) according to any one of the preceding claims, further comprising:
- a second wheel (160), which is rotatably coupled to the second body (140) according to a rotation axis (C) parallel and eccentric with re spect to the rotation axis (B) of the first wheel (145), and
- a further wheel (175), which is rotatably coupled to the second body (140) according to a rotation axis (D) orthogonal to the rotation axis (B) of the first wheel (145).
12. A trolley (130) according to claim 3 and 11 , wherein the rotation axis (D) of said further wheel (175) lies in a plane (Q) which also contains the oscilla tion axis (E) of the second body (140) with respect to first body (135), where as the rotation axes (B, C) of the first and second wheels (145, 160) are symmetrically arranged on opposite sides of said plane (Q).
PCT/IB2018/059122 2017-12-04 2018-11-20 Trolley for sliding doors WO2019111081A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18812300.4A EP3721038B1 (en) 2017-12-04 2018-11-20 Trolley for sliding doors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201700139278 2017-12-04
IT102017000139278 2017-12-04

Publications (1)

Publication Number Publication Date
WO2019111081A1 true WO2019111081A1 (en) 2019-06-13

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Application Number Title Priority Date Filing Date
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WO (1) WO2019111081A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100316A (en) * 1961-02-10 1963-08-13 Boiu Rudolph Reu Adjustable door hanger
EP0814226A1 (en) * 1996-06-18 1997-12-29 Koblenz S.r.l. Device for the adjustable connection of a sliding door wing to a furniture piece
EP2591189A1 (en) * 2010-07-07 2013-05-15 Assa Abloy Entrance Systems AB Wheel carriage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100316A (en) * 1961-02-10 1963-08-13 Boiu Rudolph Reu Adjustable door hanger
EP0814226A1 (en) * 1996-06-18 1997-12-29 Koblenz S.r.l. Device for the adjustable connection of a sliding door wing to a furniture piece
EP2591189A1 (en) * 2010-07-07 2013-05-15 Assa Abloy Entrance Systems AB Wheel carriage

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EP3721038B1 (en) 2022-03-02

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