EP2584087B1

EP2584087B1 - Machine for spreading out and loading flat clothing articles

Info

Publication number: EP2584087B1
Application number: EP20110380081
Authority: EP
Inventors: Dominique Garrone; Sylvain Duplouy; Manuel Gorriz
Original assignee: Girbau Robotics
Current assignee: Girbau Robotics
Priority date: 2011-10-17
Filing date: 2011-10-17
Publication date: 2015-03-25
Anticipated expiration: 2031-10-17
Also published as: EP2584087A1; ES2539424T3

Description

Technical Field

The present invention relates to a machine for spreading out and loading flat clothing articles to a laundry processing unit, such as an ironing machine, a dryer or the like. The machine of the present invention includes two or three loading stations served by respective operators for spreading and loading large flat clothing articles, such as sheets or tablecloths, in a semiautomatic loading mode, and alternatively allows spreading and loading small flat clothing articles, such as napkins, pillowcases, cloths or tablecloths in a manual loading mode.

Background of the Invention

Machines for spreading and loading flat clothing articles comprising a frame supporting a conveyor belt and two or more loading stations served by respective operators in a semiautomatic loading mode are known. Each loading station comprises a pair of loading and spreading clamps in which the corresponding operator secures two contiguous corners of a large flat clothing article, for example a sheet. These loading and spreading clamps are moved in a direction transverse to the forward direction of the conveyor belt such that they unfold the flat clothing article, position it facing a loading end of the conveyor belt and smoothen it. Deposition means then deposit an upper end of the flat clothing article on the conveyor belt and the movement of the conveyor belt loads the flat clothing article thereon and transfers it to the laundry processing unit.
Optionally, in the loading stations there are several pairs of loading clamps receiving the corners of the flat clothing article loaded by the corresponding operator and transfer them to a pair of spreading clamps which unfold, position and smoothen the flat clothing article, so that the deposition means can deposit it on the conveyor belt.
Some machines such as those described above which further include an alternative manual loading mode by means of which one or more operators can load small flat clothing articles such as napkins, pillowcases, cloths or tablecloths directly on the conveyor belt, are also known.
Document EP-A-1683908 describes an example of one of such machines of the prior art. Other known machines are described in EP-A-0554205 and JP-A-2002326000 .
Finally, document US-A1-0345087 discloses a machine for spreading and loading flat clothing articles, comprising all the features belonging to the preamble of independent claim 1.
These machines for spreading and loading flat clothing articles of the state of the art have in general one or more of the following drawbacks:

Risk for the operators due to the movements of the clamps which are necessarily fast if wanting to achieve a high productivity.
Productivity relatively limited by the time taken by the conveyor belt to load a flat clothing article, since the spreading clamps cannot spread and position a flat clothing article until the loading end of the conveyor belt is free to receive it and to not hinder the preceding flat clothing article.
Bad quality in depositing the flat clothing articles on the conveyor belt, for example the presence of folds and wrinkles due to the bad conditions in which the deposition is performed in machines of high productivity.
Large sizes of the machine, for example in those cases in which the transferring means are located at a height sufficient to keep certain movable elements away from the operators and thus reducing their risk.
Poor visibility of the small flat clothing articles deposited on the conveyor belt in the manual loading mode due to the concealment caused by protection elements partially removed for accessing the conveyor belt.

Disclosure of the Invention

The present invention aims to solve the aforementioned and other drawbacks by providing a machine for spreading out and loading flat clothing articles, comprising a frame in which there is supported at least one conveyor belt moving in a loading direction and having a loading end frontally covered by a protective cover. The machine comprises first and second loading stations located adjacent to first and second side ends of the protective cover, respectively, and first and second pairs of spreading clamps movable along a guide rail transverse to said loading direction of the conveyor belt.
Driving means independently move the first spreading clamps along the guide rail between a receiving position, in which the first spreading clamps are adjacent to one another in said first loading station and arranged for catching respective contiguous corners of a first flat clothing article manually loaded by a first operator, and a spread out position, in which the first spreading clamps are separated from one another holding said first flat clothing article hanging by gravity and spread out with respect to said loading end of the conveyor belt with its upper edge taut. Similarly, the driving means independently move the second spreading clamps along the guide rail between a receiving position, in which said second spreading clamps are adjacent to one another in said second loading station for catching respective contiguous corners of a second flat clothing article manually loaded by a second operator, and a spread out position, in which the second spreading clamps are separated from one another holding said second flat clothing article hanging by gravity and spread out with respect to said loading end of the conveyor belt with its upper edge taut.
The machine further comprises deposition means for depositing an upper end of said first and second flat clothing articles on the conveyor belt from the position in which they are supported by the first and second spreading clamps when they are in the mentioned spread out position.
The mentioned protective cover is movable and has a pressing edge at a lower end. The driving means move the protective cover between a free passage position, in which said pressing edge is at a distance from the frame sufficient to allow the passage of the first and second flat clothing articles held and moved by the first or second spreading clamps between their receiving and spread out positions, and a retaining position, in which the pressing edge is applied against the frame catching therebetween the first or second flat clothing article spread out and held by the first or second spreading clamps in the spread out position. When the spreading clamps release the corners of the first or second flat clothing article, the latter is supported between the pressing edge of the protective cover and the frame while said deposition means act.
Throughout this description, the term "first flat clothing article" is used to designate any flat clothing article loaded by the first operator in the first loading station and the term "second flat clothing article" is used to designate any flat clothing article loaded by the second operator in the second loading station.
The deposition means comprise, in an embodiment, at least one blowing nozzle fixed to the protective cover and arranged for blowing an airflow on an upper part of the flat clothing article which is being supported by the pressing edge of the protective cover once the pair of first or second spreading clamps have released the contiguous corners of the flat clothing article for depositing the upper part of the flat clothing article on the loading end of the conveyor belt. Additionally, the flat clothing article is pressed against the upper surface of the conveyor belt by press wheels installed at the ends of press arms or is attracted by suction against the upper surface of the conveyor belt by means of a suction chamber through openings existing in the conveyor belt.
The movable protective cover provided with the mentioned pressing edge acts as a safety element against risks for the operators and furthermore, in cooperation with the deposition means, assures that the flat clothing articles are deposited in a regular and reliable manner on the conveyor belt, without folds or wrinkles.
In an embodiment, the machine comprises a separator element moved by driving means between a separating position and a retracted position in coordination with the movements of the protective cover between their free passage position and retaining position, respectively. In the separating position, a separating edge of said separator element is at a distance from the protective cover sufficient to allow the passage of the first and second flat clothing articles held and moved by the first or second spreading clamps between their receiving and spread out positions when the protective cover is in the free passage position, at the same time that said separating edge of the separator element keeps the first or second flat clothing article sufficiently separated from the loading end of the conveyor belt to not interfere with a first or second flat clothing article previously deposited and which is being moved by the conveyor belt. In the retracted position which corresponds to the retaining position of the protective cover, the separator element is not in contact with the first or second flat clothing article and leaves the loading end of the conveyor belt free to allow the upper part of the first or second flat clothing article caught between the pressing edge of the protective cover and the frame to be deposited on the conveyor belt by the deposition means.
This separator element contributes to increase the productivity of the machine since it allows spreading and positioning a flat clothing article with respect to the loading end of the conveyor belt by the spreading clamps while another preceding flat clothing article, which is still being transported by the conveyor belt, is partially arranged on the conveyor belt and with one part thereof hanging by gravity from the loading end.
Another safety element against risks for the operators in an embodiment of the machine of the present invention consists of safety screens preventing the operators from being able to be harmed by the spreading clamps while the same are moved at high speed between their receiving and spread out positions. Thus, the first and second loading stations comprise respective first and second access protection screens moved by driving means between an open position and a closed position. In the open position, the first and second access protection screens allow the access of the first or second operator to the corresponding pair of first or second spreading clamps when the same is in the receiving position, and in the closed position the first and second access protection screens prevent the access of the first or second operator to the corresponding pair of first or second spreading clamps.
The first and second loading stations further comprise respective first and second inner protection screens moved by driving means between an open position and a closed position. In the open position, said first and second inner protection screens allow the movements of the corresponding pair of first or second spreading clamps between their receiving and spread out positions, and in the closed position the first and second inner protection screens prevent the access of the first or second operator to the corresponding pair of first or second spreading clamps when the same are not in the first or second loading station.
The driving means of the first and second access protection screens and of the first and second inner protection screens are controlled by control means such that when one of the loading stations has its access protection screen in its open position, then the inner protection screen of the same loading station is in its closed position, whereas the access protection screen of the other loading station is in its closed position, and the corresponding inner protection screen is in its open position, and vice versa.
In an embodiment, the machine comprises a third loading station configured to be used by a third operator. This third loading station is located between the first and second loading stations facing the conveyor belt and in communication with an opening formed in the protective cover. In this case, the first, second and third loading stations include respective pairs of first, second and third loading clamps moved by driving means in a direction parallel to the loading direction between a loading position and a transferring position. In the loading position, the pairs of first, second and third loading clamps are in a position suitable for receiving contiguous corners of the first, second and third flat clothing articles manually loaded by the first, second and third operators. In the transferring position, the pairs of first, second and third loading clamps are adjacent to one of the pairs of first and second spreading clamps and transfer said contiguous corners of the first, second and third flat clothing articles to the pairs of first and second spreading clamps.
Throughout this description, the term "third flat clothing article" is used to designate any flat clothing article loaded by the third operator in the third loading station.
In this embodiment of the machine with three loading stations, the aforementioned first and second access protection screens of the first and second loading stations, when they are in their closed positions, prevent the access of the first or second operator to the respective first and second pairs of loading clamps when the same are in the loading position, and the third loading station comprises a third access protection screen moved by driving means between an open position and a closed position. In the open position, said third access protection screen allows the access of the third operator to the corresponding pair of third loading clamps when the same is in the loading position, and in the closed position the third access protection screen prevents the access of the third operator to the corresponding pair of third loading clamps.
The three loading stations include respective first, second and third intermediate screens moved by driving means between a closed position and an open position. In the closed position, the first, second and third intermediate screens are interposed between the pairs of first, second and third loading clamps and the pairs of first and second spreading clamps when the latter are in the receiving position, such that they prevent the access of the corresponding first, second or third operator to the first and second spreading clamps when the corresponding first, second and third access protection screens are in their open position. In the open position, the first, second and third intermediate screens allow the movements of the pairs of first, second and third loading clamps between their loading and transferring positions.
In an embodiment, the movements of the loading clamps between their loading positions and their delivery positions are driven by driving means controlled by control means configured for stopping said driving means in the event that the loading clamps encounter a resistance above a predetermined threshold during their movements between the loading positions and the delivery positions. This eliminates or reduces to the minimum the risk of injury for the operator in the event that he/she puts his/her hands between the loading clamps and the spreading clamps. With this control system for controlling the movements of the loading clamps, the function of the access protection screens may be unnecessary, therefore the access protection screens can be omitted.
The first, second and third loading stations described above allow the machine of the present invention to function in a semiautomatic loading mode in which the corresponding operators manually load two contiguous corners of the flat clothing article to the clamps and the machine automatically performs the subsequent operations of spreading, positioning and depositing and transporting the flat clothing article. However, the machine of the present invention is prepared to function in a manual loading mode, in which one or more, generally up to three, operators can load small flat clothing articles directly on the loading end of the conveyor belt.
To that end, the protective cover is installed in a casing portion, which is in turn connected to the frame of the machine by a casing hinge. In the embodiment with two loading stations, the casing portion together with the protective cover can pivot with respect to the frame between a semiautomatic loading position and a manual loading position. In said semiautomatic loading position the protective cover frontally covers the loading end of the conveyor belt such that the large flat clothing articles can be loaded through the loading stations in the semiautomatic loading mode as has been described above. Contrarily, in said manual loading position the protective cover is lifted up and exposes the loading end of the conveyor belt such that it allows one or more operators to manually load small flat clothing articles directly on the loading end of the conveyor belt in the manual loading mode. In this manual loading position the protective cover is lifted up sufficiently to provide the operators with good visibility of the clothing articles deposited.
In the embodiment with three loading stations, the protective cover is also installed in the mentioned casing portion similarly to the embodiment with two loading stations, and the third loading station is directly connected to the casing portion. Thus, the casing portion pivots together with the protective cover and the third loading station between the semiautomatic loading position and the manual loading position. In the semiautomatic loading position, the protective cover and the third loading station are in an operative condition. In the manual loading position, the protective cover and the third loading station are in inoperative positions and are lifted up sufficiently to provide the operators with good visibility of the clothing articles deposited.
Both in the embodiment with two loading stations and in the embodiment with three loading stations, the protective cover is connected to the casing portion by a cover hinge, such that the protective cover can pivot about said cover hinge between the free passage position and retaining position. The driving means are operatively connected to the protective cover and to the casing portion to drive the movements of the protective cover between the free passage position and retaining position with respect to the casing portion, which is performed when the casing portion is in the semiautomatic loading position.

Brief Description of the Drawings

The foregoing and other features and advantages will be better understood from the following detailed description of exemplary embodiments with reference to the attached drawings, in which:

Fig. 1 is a schematic plan view of a machine for spreading out and loading flat clothing articles according to a first embodiment of the present invention with two loading stations in a semiautomatic loading mode and with protection screens in a first position;
Fig. 2 is a schematic plan view of the machine of Fig. 1 in the semiautomatic loading mode and with the protection screens in a second position;
Fig. 3 is a side view of the machine of Fig. 1 in the semiautomatic loading mode with a protective cover in a free passage position;
Fig. 4 is a side view of the machine of Fig. 1 in the semiautomatic loading mode with the protective cover in a retaining position;
Fig. 5 is a side view of the machine of Fig. 1 showing a first loading station in the semiautomatic loading mode;
Fig. 6 is a side view of the machine of Fig. 1 in a manual loading mode;
Fig. 7 is a plan view of the machine of Fig. 1 in the manual loading mode;
Fig. 8 is a schematic plan view of a machine for spreading out and loading flat clothing articles according to a second embodiment of the present invention with three loading stations in a semiautomatic loading mode;
Fig. 9 is a side view of the machine of Fig. 8 in the semiautomatic loading mode with a protective cover in a free passage position;
Fig. 10 is a side view of the machine of Fig. 8 in the semiautomatic loading mode with the protective cover in a retaining position;
Fig. 11 is a side view of the machine of Fig. 8 showing a third loading station in the semiautomatic loading mode; and
Fig. 12 is a side view of the machine of Fig. 8 in a manual loading mode.

Detailed Description of Exemplary Embodiments

First referring to Figs. 1 to 7, there is shown a machine for spreading out and loading flat clothing articles according to a first embodiment of the present invention, which comprises a frame 10 supporting a conveyor belt 30 having a considerably horizontal or slightly inclined upper section moving in a loading direction D. The conveyor belt 30 has a loading end 30a on which there is deposited a duly spread out and positioned upper part of flat clothing articles A1, A2, and an unloading end 30b, from which the spread out flat clothing articles A1, A2 are transferred to a laundry processing unit 33, such as an ironing unit or a folding unit, schematically depicted by means of dashed lines. Flat clothing articles are understood as linen elements and other clothing for use in the home, hospitals, hotels, restaurants, etc., such as tablecloths, napkins, sheets, pillowcases, and cloths, among others.
The mentioned loading end 30a of the conveyor belt 30 is covered frontally by a protective cover 11, and the machine of this first embodiment includes first and second loading stations 1, 2 adjacent to first and second side ends of said protective cover 11, beyond corresponding first and second side ends 30c, 30d of the conveyor belt 30. The first and second loading stations 1, 2 are used by respective first and second operators P1, P2 in a semiautomatic loading mode.
Along the width of the conveyor belt 30 and of the first and second loading stations 1, 2 there is extended a guide rail 8 arranged in a direction transverse to said loading direction D of the conveyor belt 30. A pair of first spreading clamps 4a, 4b are installed on corresponding first carriages 6a, 6b which are independently moved by driving means along said guide rail 8 between a receiving position, in which said first spreading clamps 4a, 4b are adjacent to one another in said first loading station 1 (Fig. 1), and a spread out position, in which the first spreading clamps 4a, 4b are separated from one another and positioned facing the loading end of the conveyor belt 30 (Fig. 2).
Similarly, a pair of second spreading clamps 5a, 5b are installed on corresponding second carriages 7a, 7b which are moved independently by driving means along the guide rail 8 between a receiving position, in which said second spreading clamps 5a, 5b are adjacent to one another in said second loading station 2 (Fig. 2), and a spread out position, in which the second spreading clamps 5a, 5b are separated from one another and positioned facing the loading end of the conveyor belt 30 (Fig. 1).
When the pair of first spreading clamps 4a, 4b is in its receiving position in the first loading station 1 (Fig. 1), the first operator P1 searches for contiguous corners of a first flat clothing article A1 and catches them manually to the first pair of spreading clamps 4a, 4b. Once the corners are caught, a swift movement of the first spreading clamps 4a, 4b towards their spread out position (Fig. 2) spreads the first flat clothing article A1 until its upper edge is taut and positions it facing the conveyor belt 30. At the same time that first spreading clamps 4a, 4b position the first flat clothing article A1 in the spread out position, the pair of second spreading clamps 5a, 5b is in its receiving position in the second loading station 2 (Fig. 2), and the second operator P2 searches for contiguous corners of a second flat clothing article A2 so as to catch them manually to the second pair of spreading clamps 5a, 5b. Next, a swift movement of the second spreading clamps 5a, 5b towards their spread out position (Fig. 1) spreads the second flat clothing article A2 until its upper edge is taut and positions it facing the conveyor belt 30, while the pair of first spreading clamps 4a, 4b have swiftly returned to their receiving position in the first loading station 1 (Fig. 1), and the loading cycle will thus be repeated.
In the spread out position, the first and second spreading clamps 4a, 4b; 5a, 5b hold the corresponding first or second flat clothing article A1, A2 hanging by gravity inside a narrow pit (not shown) adjacent to the loading end 30a of the conveyor belt 30. From this spread out position, an upper part of the first and second flat clothing articles A1, A2 is deposited on the loading end 30a of the conveyor belt 30 by deposition means which will be explained in detail below, and the first and second flat clothing articles A1, A2 are transported in the loading direction D by the conveyor belt 30 and transferred to the laundry processing unit 33.
The first and second loading stations 1, 2 define respective enclosures in which there are positioned the pairs of first and second spreading clamps 4a, 4b; 5a, 5b when they are in their receiving positions, and said enclosures have respective windows through which the first and second operators P1, P2 access the enclosures. The first and second loading stations 1, 2 comprise respective first and second access protection screens 13, 14 located in said windows and are moved vertically by driving means between an open position (indicated by means of dashed lines in Figs. 1 and 2) and a closed position (indicated by means of solid lines in Figs. 1 and 2). The first and second loading stations 1, 2 also comprise respective first and second inner protection screens 15, 16 moved vertically by driving means between an open position (indicated by means of dashed lines in Figs. 1 and 2) and a closed position (indicated by means of solid lines in Figs. 1 and 2).
Thus, the first and second access protection screens 13, 14 are in positions approximately parallel to the protective cover 11 and substantially aligned therewith, whereas the first and second inner protection screens 15, 16 are in positions substantially perpendicular to the first and second access protection screens 13, 14. The driving means of the first and second access protection screens 13, 14 and of the first and second inner protection screens 15, 16 can be, for example, linear actuators 34 (Fig. 5) driven by fluid-dynamic or electric energy.
In the open position, the first and second access protection screens 13, 14 allow the access of the first or second operator P1, P2 to the corresponding enclosure of the first or second loading station 1, 2 where the pair of first or second spreading clamps 4a, 4b; 5a, 5b is located when the same is in the receiving position, and in the closed position, the first and second access protection screens 13, 14 close the mentioned windows and prevent the access of the first or second operator P1, P2 to the corresponding pair of first or second spreading clamps 4a, 4b; 5a, 5b.
When the first and second inner protection screens 15, 16 are in the open position, they allow the movements of the corresponding pair of first or second spreading clamps 4a, 4b; 5a, 5b between their receiving positions inside the corresponding enclosure of the first or second loading station 1, 2 and their spread out positions facing the loading end 30a of the conveyor belt 30. When the first and second inner protection screens 15, 16 are in the closed position, they prevent the access of the first or second operator P1, P2 to the corresponding pair of first or second spreading clamps 4a, 4b; 5a, 5b when the same are not in the first or second loading station 1, 2, i.e., when they are in their spread out positions or being moved at high speed towards or from their spread out positions facing the loading end 30a of the conveyor belt 30.
The machine comprises control means which control the driving means moving the first and second access protection screens 13, 14 and the first and second inner protection screens 15, 16 such that when the first access protection screen 13 is in its open position (Fig. 1), then the first inner protection screen 15 is in its closed position, the second access protection screen 14 is in its closed position, and the second inner protection screen 16 is in its open position, and when the first access protection screen 13 is in its closed position (Fig. 2), then the first inner protection screen 15 is in its open position, the second access protection screen 14 is in its open position, and the second inner protection screen 16 is in its closed position.
This alternating movement of the protection screens provides a very high level of safety for the first and second operators P1, P2 against the risk of being harmed by the first and second spreading clamps 4a, 4b; 5a, 5b being moved at high speed. The opening of the access protection screens informs the first and second operators P1, P2 when a flat clothing article A1, A2 can be introduced and establishes the cycle rate.
Referring especially to Figs. 3 and 4, the mentioned protective cover 11 frontally covering the loading end 30a of the conveyor belt 30 is movable and has a pressing edge 12 at a lower end facing the frame 10. The protective cover 11 is connected to a casing portion 17 by means of a cover hinge 18, and driving means 20, such as fluid-dynamic cylinders or the like, are operatively connected to the protective cover 11 and to the casing portion 17 to drive pivoting movements of the protective cover 11 about the cover hinge 18 between a free passage position (Fig. 3), in which said pressing edge 12 is at a distance from the frame 10 sufficient to allow the passage of the first and second flat clothing articles A1, A2 when they are held and moved by the pair of first or second spreading clamps 4a, 4b; 5a, 5b between their receiving and spread out positions and insufficient to allow the access of the hands of the operator to dangerous areas of the machine where the spreading clamps 4a, 4b; 5a, 5b move at high speed, and a retaining position (Fig. 4), in which the pressing edge 12 is applied against the frame 10 catching therebetween the first or second flat clothing article A1, A2 while the same is spread out and held by the first or second spreading clamps 4a, 4b; 5a, 5b in their spread out position.
Once the protective cover 11 has reached its retaining position (Fig. 4), the pair of first or second spreading clamps 4a, 4b; 5a, 5b releases the contiguous corners of the first or second flat clothing article A1, A2, such that the latter is caught and supported by the pressing edge 12 against the frame 10. Then the mentioned deposition means act, which in the illustrated example comprise an blowing nozzle 21 fixed to the protective cover 11 and arranged to blow an airflow on an upper part of the first or second flat clothing article A1, A2 comprised between the pressing edge 12 and the pair of first or second spreading clamps 4a, 4b; 5a, 5b. When the airflow contacts the first or second flat clothing article A1, A2 it deposits the upper part thereof on the loading end 30a of the conveyor belt 30.
Above the conveyor belt 30, the deposition means further comprise a plurality of press wheels 22 installed at the ends of corresponding movable press arms 23 driven to press the upper part of the first or second flat clothing article A1, A2 against the loading end 30a of the conveyor belt 30. In the embodiment illustrated, the blowing nozzle 21 has the shape of a longitudinal slot formed in a hollow profile extending along the protective cover, although alternatively there could be a plurality of individual blowing nozzles. Likewise, the press wheels 22 could be replaced with a suction chamber (such as the suction chamber 32 shown in Figs. 9-12) connected to a vacuum source and arranged below an upper section of the conveyor belt to attract by suction the first or second flat clothing article A1, A2 through openings existing in the conveyor belt.
The protective cover 11 is installed in a casing portion 17, which is in turn connected to the frame 10 by a casing hinge 19 about which said casing portion 17 together with the protective cover 11 can pivot with respect to the frame 10 between a semiautomatic loading position (Figs. 3, 4 and 5) and a manual loading position (Fig. 6). In said semiautomatic loading position, the protective cover 11 frontally covers the loading end 30a of the conveyor belt 30 and its pressing edge 12 is in an operative condition, as has been described above. In said manual loading position, the casing portion 17 and the protective cover 11 are lifted upwards exposing the loading end 30a of the conveyor belt 30 to allow one or more operators to load small flat clothing articles Ap1, Ap2, Ap3 directly on the loading end 30a of the conveyor belt 30 in a manual loading mode.
As shown in Fig. 7, in the manual loading mode, each operator deposits the small flat clothing articles Ap1, Ap2, Ap3 in a sector of the conveyor belt 30.
Figs. 8 to 12 describe a machine for spreading out and loading flat clothing articles according to a second embodiment of the present invention, which comprises a third loading station 3 added to the basic configuration with two loading stations 1, 2 of the first embodiment.
As shown in Fig. 8, in this second embodiment, the mentioned third loading station 3 is located in a central area of the machine, between said first and second loading stations 1, 2 and facing the conveyor belt 30. The protective cover 11 has an opening (not shown) in register with the third loading station 3, and a third operator P3 is in charge of serving the third loading station 3 in the semiautomatic loading mode. The enclosures defined by the first, second and third loading stations 1, 2, 3 protrude outwards in relation with the protective cover 11, and have associated therewith respective pairs of first,second and third loading clamps 24a, 24b; 25a, 25b; 26a, 26b moved by driving means in a direction substantially perpendicular to the guide rail 8 between a loading position and a transferring position. The pairs of first and second spreading clamps 4a, 4b; 5a, 5b maintain the same configuration as in the first embodiment, and the pairs of first, second and third loading clamps 24a, 24b; 25a, 25b; 26a, 26b provide a significant increase of productivity and allow keeping the hands of the operators away from the first and second spreading clamps 4a, 4b; 5a, 5b, which move at high speed.
In said loading position, the pairs of first, second and third loading clamps 24a, 24b; 25a, 25b; 26a, 26b are adjacent to the windows of the enclosures defined by the first, second and third loading stations 1, 2, 3, such that they can receive contiguous corners of the first, second and third flat clothing articles A1, A2, A3 manually loaded by the corresponding first, second and third operators P1, P2, P3. In said transferring position, the pairs of first, second and third loading clamps 24a, 24b; 25a, 25b; 26a, 26b transfer the contiguous corners of the first, second and third flat clothing articles A1, A2, A3 to one of said pairs of first and second spreading clamps 4a, 4b; 5a, 5b.
The machine of this second embodiment comprises a separator element 9 in the shape of a plate located above the conveyor belt 30. This separator element is moved by driving means in coordination with the movements of the protective cover 11 between a separating position (Fig. 9) corresponding with the free passage position of the protective cover 11, and a retracted position (Fig. 10) corresponding with the retaining position of the protective cover 11. The mentioned driving means of the separator element 9 comprise, for example, a linear actuator 35 driven by fluid-dynamic or electric energy. The protective cover 11 maintains the same configuration as in the first embodiment, although in this second embodiment with three loading stations (Fig. 9), when the protective cover 11 is in its free passage position, it is further separated from the frame 10 in comparison with the first embodiment with two loading stations (Fig. 3).
In the mentioned separating position (Fig. 9), a separating edge 9a of said separator element 9 is at a distance from the protective cover 11, which is located in its free passage position. This distance is sufficient to allow the passage of the first, second and third flat clothing articles A1, A2, A3 (A1 in Fig. 9) held and moved by the first or second spreading clamps 4a, 4b; 5a, 5b between their receiving and spread out positions but insufficient to allow the access of the hands of an operator to dangerous areas of the machine where the spreading clamps 4a, 4b; 5a, 5b move at high speed. Furthermore, in this separating position, the separating edge 9a of the separator element 9 keeps the first, second or third flat clothing article A1, A2, A3 (A1 in Fig. 9) separated from the loading end 30a of the conveyor belt 30, which allows transporting a preceding flat clothing article A1, A2, A3 (A2 in Fig. 9) by the conveyor belt without hindering one another nor creating interferences.
The protective cover 11 allows a movement towards the operator P1, P2, P3 if the latter pulls the protective cover 11 outwards, in a direction opposite the frame 10, for example in the event that the operator P1, P2, P3 got his/her hands caught between the pressing edge 12 of the protective cover 11 and the frame 10, and control means are configured for stopping the operation of the machine in the event that one of the operators P1, P2, P3 pulls the protective cover 11 outwards. This feature is common for the embodiments with two and three loading stations.
In said retracted position (Fig. 10), the separator element 9 is retracted towards the inside of the machine and leaves the loading end 30a of the conveyor belt 30 free to allow depositing the first, second and third flat clothing articles A1, A2, A3. Thus, in this retracted position, the separator element 9 allows moving the protective cover 11 to its retaining position and the deposition means to deposit the upper part of the first, second or third flat clothing article A1, A2, A3 on the loading end 30a of the conveyor belt 30. The plate forming the separator element 9 is preferably round in shape to facilitate sliding the first, second and third flat clothing articles A1, A2, A3 thereon.
It must be pointed out that although this separator element 9 is essential for the second embodiment of the machine with three loading stations 1, 2, 3, it can also be applied to the first embodiment of the machine with two loading stations 1, 2, in which case it allows increasing the cycle speed without the risk of interference between the first and second flat clothing articles A1, A2.
Due to the presence of the separator element 9, in the second embodiment the deposition means comprise a suction chamber 32 (Figs. 9 to 12) instead of the press wheels 22 described above in relation with the embodiment with two loading stations. The suction chamber 32 is arranged below an upper section of the conveyor belt 30 and connected to a vacuum source (not shown). The conveyor belt 30 has openings, for example formed by separations between parallel bands forming the conveyor belt 30, and the suction chamber 32 acts to attract by suction the first, second or third flat clothing article A1, A2, A3 against the loading end 30a of the conveyor belt 30 through said openings of the conveyor belt 30. The suction chamber is also applicable to the first embodiment with two loading stations when the same incorporates the separator element 9.
In the second embodiment with three loading stations 1, 2, 3, when the first and second access protection screens 13, 14 of the first and second loading stations 1, 2 are in the closed position, they prevent the access of the first and second operators P1, P2 to the respective pairs of first and second loading clamps 24a, 24b; 25a, 25b, and the third loading station 3 comprises a third access protection screen 31 moved by driving means between an open position, in which said third access protection screen 31 allows the access of the third operator P3 to the corresponding pair of third loading clamps 26a, 26b when the same is in the loading position, and a closed position, in which said third access protection screen 31 prevent the access of the third operator P3 to the corresponding pair of third loading clamps 26a, 26b.
Furthermore, the first, second and third loading stations 1, 2, 3 include respective first, second and third intermediate screens 27, 28, 29 moved by driving means between a closed position and an open position. In the closed position, said first, second and third intermediate screens 27, 28, 29 are interposed between the pairs of first, second and third loading clamps 24a, 24b; 25a, 25b; 26a, 26b and the pairs of first and second spreading clamps 4a, 4b; 5a, 5b when the latter are in the receiving position, which occurs when the corresponding first, second and third access protection screens 13, 14, 31 are in their open position. In the open position, the first, second and third intermediate screens 27, 28, 29 are lifted up and allow the movements of the pairs of first, second and third loading clamps 24a, 24b; 25a, 25b; 26a, 26b between there loading and transferring positions.
The driving means moving the third access protection screen 31 between its open and closed positions comprise for example a linear actuator 34 driven by fluid-dynamic or electric energy, and the driving means moving the first, second and third intermediate screens 27, 28, 29 between their open and closed positions comprise for example respective linear actuators 36 driven by fluid-dynamic or electric energy.
In this second embodiment with three loading stations 1, 2, 3, the protective cover 11 is installed in the casing portion 17 in a manner similar to that described above in relation with the first embodiment with two loading stations, and the third loading station 3 is fixed to the same casing portion 17. The casing portion 17 herein is also connected to the frame 10 by a casing hinge 19 about which said casing portion 17 together with the protective cover 11 and the third loading station 3 can pivot with respect to the frame 10 between a semiautomatic loading position (Fig. 11) and a manual loading position (Fig. 12).
In the semiautomatic loading position (Fig. 11), the protective cover 11 is in an operative condition frontally covering the loading end 30a of the conveyor belt 30 and the third loading station 3 is also in an operative condition. In the manual loading position (Fig. 12), the protective cover 11 and the third loading station 3 are lifted in an inoperative condition such that they expose the loading end 30a of the conveyor belt 30 to allow one or more operators P1, P2, P3 to load small flat clothing articles Ap1, Ap2, Ap3 directly on the loading end 30a of the conveyor belt 30 in a manner similar to that described above in relation with the first embodiment with two loading stations (Fig. 7).
Modifications, variations and combinations will occur to a person skilled in the art from the embodiments shown and described without departing from the scope of the present invention as defined in the attached claims.

Claims

A machine for spreading out and loading flat clothing articles, comprising:
a frame (10) supporting at least one conveyor belt (30) moving in a loading direction (D), and having a loading end (30a);

a protective cover (11) frontally covering said loading end (30a) of the conveyor belt (30);

driving means for moving said protective cover (11);

first and second loading stations (1, 2) adjacent to first and second side ends of said protective cover (11);

a pair of first spreading clamps (4a, 4b) moved independently by driving means along a guide rail (8) transverse to said loading direction (D) of the conveyor belt (30) between a receiving position, in which said first spreading clamps (4a, 4b) are adjacent to one another in said first loading station (1) for catching respective contiguous corners of a first flat clothing article (A1) manually loaded by a first operator (P1), and a spread out position, in which the first spreading clamps (4a, 4b) are separated from one another holding said first flat clothing article (A1)spread out with respect to said loading end (30a) of the conveyor belt (30);

a pair of second spreading clamps (5a, 5b) moved independently by driving means along said guide rail (8) between a receiving position, in which said second spreading clamps (5a, 5b) are adjacent to one another in said second loading station (2) for catching respective contiguous corners of a second flat clothing article (A2) manually loaded by a second operator (P2), and a spread out position, in which the second spreading clamps (5a, 5b) are separated from one another holding said second flat clothing article (A2) spread out with respect to said loading end (30a) of the conveyor belt (30); and

deposition means for depositing an upper end of said first and second flat clothing articles (A1, A2) on the conveyor belt (30) from said spread out position of the first and second spreading clamps (4a, 4b; 5a, 5b);

characterized in that said protective cover (11) is movable and has a pressing edge (12) at a lower end, and in that said driving means are suitable for moving the protective cover (11) between a free passage position, in which said pressing edge (12) is at a distance from the frame (10) sufficient to allow the passage of the first and second flat clothing articles (A1, A2) held and moved by the first or second spreading clamps (4a, 4b; 5a, 5b) between their receiving and spread out positions and insufficient to allow the access of the hands of the operator (P1, P2) to dangerous areas, and a retaining position, in which the pressing edge (12) is applied against the frame (10) catching therebetween the first or second flat clothing article (A1, A2) spread out and held by the first or second spreading clamps (4a, 4b; 5a, 5b) in their spread out position and supporting the first or second flat clothing article (A1, A2) while said deposition means act.
The machine for spreading out and loading flat clothing articles according to claim 1, characterized in that the machine comprises a separator element (9) moved by driving means in coordination with the movements of the protective cover (11) between a separating position, in which a separating edge (9a) of said separator element (9) is at a distance from the protective cover (11) sufficient to allow the passage of the first and second flat clothing articles (A1, A2) held and moved by the first or second spreading clamps (4a, 4b; 5a, 5b) between their receiving and spread out positions and insufficient to allow the access of the hands of the operator (P1,P2) to dangerous areas when the protective cover (11) is in the free passage position, and in which said separating edge (9a) keeps the first or second flat clothing article (A1, A2) separated from the loading end (30a) of the conveyor belt (30), and a retracted position, in which the separator element (9) leaves the loading end (30a) of the conveyor belt (30) free to allow depositing the first and second flat clothing articles (A1, A2) when the protective cover (11) is in the retaining position.
The machine for spreading out and loading flat clothing articles according to claim 1 or 2, characterized in that the first and second loading stations (1, 2) comprise respective first and second access protection screens (13, 14) moved by driving means between an open position, in which said first and second access protection screens (13, 14) allow the access of said first or second operator (P1, P2) to the corresponding pair of first or second spreading clamps (4a, 4b; 5a, 5b) when the same is in the receiving position, and a closed position, in which said first and second access protection screens (13, 14) prevent the access to the corresponding pair of first or second spreading clamps (4a, 4b; 5a, 5b).
The machine for spreading out and loading flat clothing articles according to claim 3, characterized in that the first and second loading stations (1, 2) comprise respective first and second inner protection screens (15, 16) moved by driving means between an open position, in which said first and second inner protection screens (15, 16) allow the movements of the corresponding pair of first or second spreading clamps (4a, 4b; 5a, 5b) between their receiving and spread out positions, and a closed position, in which said first and second inner protection screens (15, 16) prevent the access of the first or second operator (P1, P2) to the corresponding pair of first or second spreading clamps (4a, 4b; 5a, 5b) when the same are not in the first or second loading station (1, 2).
The machine for spreading out and loading flat clothing articles according to claim 4, characterized in that control means control said driving means of the first and second access protection screens (13, 14) and the first and second inner protection screens (15, 16) such that when the first access protection screen (13) is in its open position, then the first inner protection screen (15) is in its closed position, the second access protection screen (14) is in its closed position, and the second inner protection screen (16) is in its open position, and when the first access protection screen (13) is in its closed position, then the first inner protection screen (15) is in its open position, the second access protection screen (14) is in its open position, and the second inner protection screen (16) is in its closed position.
The machine for spreading out and loading flat clothing articles according to claim 1, characterized in that the protective cover (11) when it is in a semiautomatic loading position, allows an outward movement thereof in a direction opposite the frame (10), and control means are configured for stopping the operation of the machine in the event that one of the first, second and third operators (P1, P2, P3) pulls the protective cover (11) outwards.
The machine for spreading out and loading flat clothing articles according to any one of claims 2 to 6, characterized in that a third loading station (3) configured to be served by a third operator (P3) is located between said first and second loading stations (1, 2) facing said conveyor belt (30), and said first, second and third loading stations (1, 2, 3) include respective pairs of first, second and third loading clamps (24a, 24b; 25a, 25b; 26a, 26b) moved by driving means between a loading position, in which said pairs of first, second and third loading clamps (24a, 24b; 25a, 25b; 26a, 26b) can receive contiguous corners of the first,second and third flat clothing articles (A1, A2, A3) manually loaded by said first, second and third operators (P1, P2, P3), and a transferring position, in which the pairs of first, second and third loading clamps (24a, 24b; 25a, 25b; 26a, 26b) transfer said contiguous corners of the first, second and third flat clothing articles (A1, A2, A3) to one of said pairs of first and second spreading clamps (4a, 4b; 5a, 5b).
The machine for spreading out and loading flat clothing articles according to claim 7, characterized in that the movements of each of the pairs of first, second and third loading clamps (24a, 24b; 25a, 25b; 26a, 26b) between their loading positions and their delivery positions are driven by driving means controlled by control means configured for stopping said driving means in the event that the pair of first, second or third loading clamps (24a, 24b; 25a, 25b; 26a, 26b) encounters a resistance above a predetermined threshold during their movements between the loading positions and the delivery positions.
The machine for spreading out and loading flat clothing articles according to claim 7 or 8, characterized in that the first, second and third loading stations (1, 2, 3) include respective first, second and third intermediate screens (27, 28, 29) moved by driving means between a closed position, in which said first, second and third intermediate screens (27, 28, 29) are interposed between the pairs of first, second and third loading clamps (24a, 24b; 25a, 25b; 26a, 26b) and the pairs of first and second spreading clamps (4a, 4b; 5a, 5b) when the latter are in the receiving position and the corresponding first, second and third access protection screens (13, 14, 31) are in their open position, and an open position.
The machine for spreading out and loading flat clothing articles according to claim 9, characterized in that said first and second access protection screens (13, 14) of the first and second loading stations (1, 2) prevent the access of the first or second operator (P1, P2) to the respective first and second pairs of loading clamps (24a, 24b; 25a, 25b) when they are in the closed position, and said third loading station (3) comprises a third access protection screen (31) moved by driving means between an open position, in which said third access protection screen (31) allows the access of said third operator (P3) to the corresponding pair of third loading clamps (26a, 26b) when the same is in the loading position, and a closed position, in which said third access protection screen (31) prevent the access to the corresponding pair of third loading clamps (26a, 26b).
The machine for spreading out and loading flat clothing articles according to claim 1 or 2, characterized in that the protective cover (11) is installed in a casing portion (17) and said casing portion (17) is connected to the frame (10) by a casing hinge (19) about which said casing portion (17) together with the protective cover (11) can pivot with respect to the frame (10) between a semiautomatic loading position, in which the protective cover (11) frontally covers the loading end (30a) of the conveyor belt (30), and a manual loading position, in which the protective cover (11) exposes the loading end (30a) of the conveyor belt (30) to allow one or more operators to load small flat clothing articles (Ap1, Ap2, Ap3) directly on the loading end (30a) of the conveyor belt (30).
The machine for spreading out and loading flat clothing articles according to any one of claims 8 to 11, characterized in that the protective cover (11) and the third loading station (3) are installed in a casing portion (17) and said casing portion (17) is connected to the frame (10) by a casing hinge (19) about which said casing portion (17) together with the protective cover (11) and the third loading station (3) can pivot with respect to the frame (10) between a semiautomatic loading position, in which the protective cover (11) frontally covers the loading end (30a) of the conveyor belt (30) and the third loading station (3) is in a operative condition, and a manual loading position, in which the protective cover (11) exposes the loading end (30a) of the conveyor belt (30) to allow one or more operators to load small flat clothing articles (Ap1, Ap2, Ap3) directly on the loading end (30a) of the conveyor belt (30) and the third loading station (3) is in an inoperative condition.
The machine for spreading out and loading flat clothing articles according to claim 11 or 12, characterized in that the protective cover (11) is connected to said casing portion (17) by a cover hinge (18) about which the protective cover (11) pivots between said free passage position and retaining position, and driving means (20) are operatively connected to the protective cover (11) and to the casing portion (17) to drive the movements of the protective cover (11) between the free passage position and retaining position with respect to the casing portion (17) when the casing portion (17) is in the semiautomatic loading position.
The machine for spreading out and loading flat clothing articles according to any one of the preceding claims, characterized in that said deposition means comprise at least one blowing nozzle (21) fixed to the protective cover (11) and arranged for blowing an airflow on an upper part of the first or second flat clothing article (A1, A2) supported by the pressing edge (12) of the protective cover (11) when the pair of first or second spreading clamps (4a, 4b; 5a, 5b) have released said contiguous corners of the first or second flat clothing article (A1, A2) to deposit said upper part of the first or second flat clothing article (A1, A2) on the loading end (30a) of the conveyor belt (30).
The machine for spreading out and loading flat clothing articles according to claim 1, characterized in that the deposition means comprise a plurality of press wheels (22) installed at the ends of movable press arms (23) to press the upper part of the first or second flat clothing article (A1, A2) against the loading end (30a) of the conveyor belt (30).
The machine for spreading out and loading flat clothing articles according to claim 2 or 7, characterized in that the deposition means comprise a suction chamber (32) connected to a vacuum source and arranged below an upper section of the conveyor belt (30) to attract by suction the first, second or third flat clothing article (A1, A2, A3) against the loading end (30a) of the conveyor belt (30) through openings of the conveyor belt (30).