ELEVATOR DOOR SYSTEM

Description

TECHNICAL FIELD OF THE INVENTION

[0001] The invention relates to an elevator door system which is used in multi-storey structures and in all kinds of buildings, the elevator system provides the saving of energy by reducing the opening distance travelled by the elevator door mechanisms.

[0002] The invention particularly relates to an elevator door system used in elevators, which enables rails to be retracted or extended within the door mechanism by reducing the distance of the moving rails by maintaining a constant entrance distance between the building floor and the elevator cabin, and which saves energy by actuating a door skate system by means of a door skate system motion mechanism.

BACKGROUND TO THE INVENTION

[0003] Transportation systems are one of the most popular and fastest developing and competitive sectors nowadays. The construction of multi-storey buildings for people's needs, comfort and natural environmental conditions has also increased the research and development works of companies operating in elevator systems.

[0004] Nowadays, elevators are used in homes and offices etc. indoor places. These elevators have automatic floor doors and interior safety cabin doors. The operating systems and the low strength of these structures cause continuous failure and safety breaches.

[0005] In the prior art, there are typically three different kinds of automatic build floor doors for elevator systems: right hand side telescopic collapsing doors, left hand side telescopic collapsing doors, and central opening system; in addition to an interior cabin safety door. The automatic floor doors function by manual movement and since the elevator shaft side walls stay close to the door edge concrete and side wall concrete areas during mounting due to the sizes and dimensions of the mechanism, it causes friction and narrow space. This reduces the quality of system operation and creates a safety flaw.

[0006] The fixed rail dimension disclosed in the above said mechanism is a measure of the total length of the cabin entrance space distance and the collapsing distance of the door with regard to the opening direction. This length not only causes additional material costs but also causes loss of energy due to longer movement during operation.

[0007] In the prior art, during mounting of the floor doors, even though attention is given to balance plummet dimensions, retraction of the right, left, front, rear, and diagonal plummets during bolting and welding fixation, and not recognizing this situation during dimensional checks, causes the floor storey door fixing mounting operation to be repeated. This causes mounting difficulty, loss of human efforts and waste of labour hours.

[0008] The improper installation of the automatic doors in the elevator systems used in the prior art leads to mounting difficulties and prevents the elevator systems from operating efficiently due to not being 100% plummet.

[0009] In the prior art, the size of the mechanism fixed rail being close to the shaft side walls causes friction at the door edge concrete. This causes a safety flaw.

[0010] In the prior art, the fact that there is no fixed balance indicator on the door causes the measurement to be lost from the plummet. As a result, when the door opening movement at the cabin floor is transferred to the manually moving floor door by the door skate system, the automatic doors cannot operate in the same harmony with the interior safety door and the aesthetic appearance is distorted. Due to this, efficient operation does not take place.

[0011] In the prior art, the length of the fixed rail dimension of the mechanism leads to material waste within the mechanism frame and the floor door frame. This increases material costs.

[0012] In the prior art, for the cabin interior safety automatic doors it is necessary to set more than one dimensions when the door centering operation is performed during the connection of the internal safety automatic door mechanism legs to the automatic door locking slides on the cabin. This requires long human power and time.

[0013] In the prior art, the interior safety automatic door fixing on the cabin, the automatic door model used while fixing on the L-type or vertical triangle leg models on the cabin top slides, fits 1/1 if it is procured from the manufacturer. If another model of cabin is purchased from another cabin manufacturer, the fixing leg does not fit the cabin top slides, and mounting difficulty is encountered. Cost burden is encountered when the cabin and the automatic door are purchased from the same manufacturer company.

[0014] In the prior art, during the door panel suspension operation after completion of the mounting operations, the panels are suspended depending on the cabin entrance distance, and it is not possible to adjust the height of the panel easily in accordance with the height of the panel when the interior safety automatic door is left above or below. When on the panels, said adjustment and fixing settings are checked again to reposition the interior safety automatic door mechanism to the panel length. This process leads to loss of human power and loss of time.

[0015] In the prior art, all the problems encountered in automatic floor door are also encountered since the floor door opening direction is directly proportional with the interior safety automatic opening direction. In order to eliminate this situation, the breaking operation of the side walls of the well called trimming is performed, or the opening direction of the internal safety automatic door is pulled to the end point in the opposite direction. In this case, adjustment of the door becomes difficult and efficient operation is restricted.

[0016] In the prior art, the interior safety automatic door on the cabin inside the automatic safety door is stretched depending on the traffic intensity during the operation period of the automatic door stabilization foot slides. When tilting to the right or left side occurs, friction occurs with the interior safety automatic door panels or narrowing occurs with the floor automatic door operating distance. This causes material damage.

[0017] When the prior art internal safety automatic door cabin is mounted over the cap, the size of the door mechanism protrudes to a large extent on the cabin, which causes the cabin suspension area to narrow down. This situation restricts the intervention of the elevator maintenance personnel due to the limited space of the elevator. The elevator maintenance personnel who cannot use this area has to control the elevator system manually by moving to the other part of the rear suspension of the cabin. As a result of this, the human body goes out of the cabin over the rear guardrail, and the head, arm, or body of the personnel may hit the counterweight in the elevator systems as result of carelessness, which causes injuries or even death.

[0018] In the prior art, the cabin top maintenance personnel needs to adjust the automatic floor door from the front side on the cabin. However, the large size of the internal safety door mechanism causes difficulties for the maintenance personnel.

[0019] In the prior art, when the counterweight application is made near the cabin, iron profiles of different geometry are applied to fix the counterweight rails. When this area applied is close to the interior safety automatic door mechanism fixed rail or the mechanism frame metal sheet, problems are encountered in some applications depending on the shaft size and this leads to elevator accidents and damages due to friction, getting caught etc.

[0020] Document FR2185226 discloses some improvements in sliding doors, in particular automatic door systems for elevators, hoists or the like; these door systems are of the type comprised by at least one sliding sheet provided with rollers cooperating with at least one guide and provided internally with runners having a sliding motion and mounted on a fixed guide, characterized by the fact that the rollers of each sheet are provided each one with: two annular rolling surfaces of convex profile cooperating with the two sections of a "V" shaped support rail. This document discloses a system according to the preamble of claim 1.

[0021] The US patent application number US77200885A (registration number US4588049) relates to double panels elevator sliding doors, in which each panel is associated to a panel suspension and guiding arrangement which comprises rollers cooperating with at least one guiding rail and through which the panel is slidably supported on the door frame. An extension of the guiding rails laterally beyond the door frame is avoided, in closing position of the door, through the provision of the panel suspension and guiding arrangement which is constructed to comprise a fixed guiding rail along which moves at least one roller movable with the panel, and a guiding rail movable with the panel and displaceable over a roller fixed in position. Such an arrangement facilitates the transportation, the handling and the mounting of doors, namely fully equipped landing doors, whether they be of the central opening or telescopic panel type.

[0022] Japanese patent JP2011144007A provides a door device for an elevator, which is reduced in size and extended in a service life, while being reduced in cost, such a door device for an elevator, having a pair of car doors (sliding doors) which are displaceable in the width direction of a car entrance; the car entrance is opened and closed by the displacement of the doors of each car; sliding door rails are installed at the upper part of the door of each car; the sliding door rails project from the door closed side ends of the door of the car in the width direction of the car entrance, respectively; guide support devices are mounted at the upper part of the car entrance; the guide support devices guide the sliding door rails in the width direction of the car entrance while supporting the sliding door rails.

[0023] In order to prevent the above said problems, the internal safety automatic door and automatic floor door options are utilized. For maintaining the cabin entrance, the width of the panel is narrowed down and the numbers are increased in order to reduce the size of the fixed mechanism rail or mechanism metal sheet in the direction of retracting or extending. Increasing the number of panels in the automatic door system is a factor that increases the cost burden.

[0024] As a result, a need has occurred for an economical and useful elevator automatic door for solving the above said prior art problems and bringing an improvement to the relevant technical field due to the inadequacy of the prior art solutions.

PURPOSE OF THE INVENTION

[0025] According to the various aspects, the present invention provides a solution to all the problems found and the above mentioned earlier prior art. The most important purpose of the present invention is to provide inwards and outwards movement capability to the rails located on the door mechanisms.

[0026] Another purpose of the invention is to reduce the motor movement of the cabin entrance distance by 50% with regard to the prior art systems with a 1/2 system, and still maintain the door opening distance.

[0027] Another purpose of the invention is to reduce energy consumption by providing a 100% increase in the life of the motor and by reducing 50% of the displacement distance travelled by the mechanisms actuated by the door motor.

[0028] Another purpose of the invention is to provide the ease assembly of the elevator opening and closing mechanisms, and also to allow them to be easily adjustable. In this way, the purpose is to reduce the loss of time in the required labour hour needed for installation and maintenance without deteriorating safety and control..

[0029] Another important purpose of the invention is to provide the rails located on the mechanism system with 1/2 motion capability, and allow the automatic door opening direction to be met by the moving rails located within the own mechanism thereof, and thus keep the shaft side walls away from the movable mechanism and ensure easy mounting and practical adjustment opportunity.

[0030] Another purpose of the invention is to provide mounting advantage in the plummet by means of the fixed balance indicator of the automatic door mechanism.

[0031] Another purpose of the invention is to eliminate the friction at the shaft side wall in accordance with the opening direction of the automatic door by means of the movable mechanism rail.

[0032] Another purpose of the invention is to provide cost advantage without the need for using an additional mechanism metal sheet, since it is mounted in the automatic door frame.

[0033] Another purpose of the invention is to provide a cost advantage by shortening the moving rails in the mechanism by ½ working technique.

[0034] A further purpose of the invention is to prevent the motor providing the movement of the ½ motion mechanism rails from narrowing down the cabin entrance space in accordance with the opening direction against the 50% motion restriction.

[0035] Another purpose of the invention is to eliminate the need for the prior art cabin cap (frontal) piece and to provide cost advantage in cabin production by mounting its own mechanism metal sheet at this area.

[0036] Another purpose of the invention is to be compatible with all types and models of domestic and imported product cabins.

[0037] Another purpose of the invention is to eliminate the need for the mechanism fixing L and right triangle leg attachment apparatuses.

[0038] Another purpose of the invention is to prevent the need for cabin top automatic door fixing metal sheet slides for the cabin manufacturer companies. In this way, cabin manufacturers will ensure cost advantage by not producing cabin top slides.

[0039] Another purpose of the invention is that since the cabinet is mounted on the cap (frontal) section with its own mechanism metal sheet, the internal safety automatic door centering allows for the possibility to work in the center without having to center and adjust since there are individual cabin entries.

[0040] Another purpose of the invention to retract the mechanism moving rails within its own mechanism metal sheet when the ½ movable mechanism rails close the elevator system door and start moving. In this way, when the elevator system is in motion, the situations of friction with the shaft side wall, deformation, and hitting are eliminated and accidents are avoided.

[0041] Another purpose of the invention is that the cabin can be mounted on the cap (frontal) area so that the right, left and front side bending comes to 0% position and thus prevents possible damages and accidents by maintaining the working distance between the building floor automatic door system and the elevator system while the elevator system is in motion.

[0042] Another purpose of the invention is to provide mounting on the cabin cap (frontal) area, and therefore it does not protrude upwards on the cabin so that the elevator maintenance personnel can use this area and easily access the cabin top auxiliary panel of the elevator system and prevent the risk for the personnel to encounter the balance counterweight and thus increase the safety of the maintenance personnel.

[0043] Another purpose of the invention is to provide a lower cost advantage compared to other systems since the cabin has the same size with the cap frontal region.

[0044] Another purpose of the invention is to prevent the friction, getting caught, collision and elevator accidents which may occur in this area by means of the internal safety automatic door mechanism moving rail by means of the internal safety automatic door opening mechanism and the internal safety automatic door opening direction of the counterbalance weight.

[0045] Another purpose of the invention is to ensure that when the elevator system reaches the designated floor, it uses all the space up to the shaft side walls while the automatic door is opened and thus eliminate the need for using a wide mechanism and a system with an increased number of door panels with regard to the dimensions and sizes of the shaft.

[0046] In the light of the above mentioned purposes, the invention provides an elevator door system used in elevators, eliminating the problems encountered in the prior art embodiments, by means of providing energy saving with a system change by maintaining a constant entrance distance between the building floor and the elevator cabin, and thus facilitating maintenance and repair operations, and comprising a rail system for reducing the opening distance, carrying the door panels thereon and thus providing motion to the door panels, and allowing the movable rails to be retracted or extended within the door mechanism by reducing the distance thereof, and a door skate system motion mechanism transmitting the motion coming from the motor to the door skate system. The rail system is provided with an equal width as the elevator door entrance distance, and thus the problem in the prior art of the necessity for having a difference in this size is eliminated.

[0047] The door skate system motion mechanism comprises:

• stabilizer pulleys providing balance and strength to the system when the elevator door system is opened, by making pressure on the support force stabilizer from below and above,
• a first pulley used for increasing the displacement distance of the support force stabilizer,
• a second pulley located on the door skate system motion mechanism (6) and transferring the incoming movement to the door skate system,
• a distance lever located on the door skate system motion mechanism and restricting the displacement distance, and,
• a motion pin allowing the up-and-down movement of the system to be on a single line.

FIGURES FOR BETTER UNDERSTANDING OF THE INVENTION

[0048] 

Figure 1 is a perspective view showing the elevator system according to the invention.

Figure 2 is a front view of the elevator system according to the invention.

Figure 3 is a rear view of the elevator system according to the invention.

Figure 4 is a closed position view of the elevator system according to the invention.

Figure 5 is a front perspective view of the door skate system motion mechanism located in the elevator system according to the invention.

Figure 6 is a rear view of the door skate system motion mechanism located in the elevator system according to the invention.

Figure 7 is a front view of the door skate system motion mechanism located in the elevator system according to the invention.

Figure 8 is a side perspective view of the door skate system motion mechanism located in the elevator system according to the invention.

REFERENCE NUMBERS

[0049] 

1. Rail System

2. Movable Panel Hanger Plate

3. Guide Rail Carrier System

4. Support Force stabilizer

5. Motor Motion System

6. Door skate System Motion Mechanism

6.1. Stabilizer Pulley

6.2. First Pulley

6.3. Second Pulley

6.4. Distance Lever

6.5. Motion Pin

7. Balance Plummet Indicator

8. Mechanism Frame

9. Motion Transmitter

10. Panel Connection 1/1 Hanger Plate

11. Safety Plug Contact

12. Door skate

DETAILED DESCRIPTION OF THE INVENTION

[0050] The elevator system according to the invention consists of the components of a rail system (1), a movable panel hanger plate (2), a guide rail carrier system (3), support force stabilizer (4), a motor motion system (5), a door skate system motion mechanism (6), a balance plummet indicator (7), a mechanism frame (8), a motion transmitter (9), a panel connection 1/1 hanger plate (10), a safety plug contact (11), and a door skate (12). The door skate system motion mechanism (6) comprises the main components of a stabilizer pulley (6.1), a first pulley (6.2), a second pulley (6.3), a distance lever (6.4), and a motion pin (6.5).

[0051] As best shown in figures 1, 2, 3 and 4, the system is shown from different angles and in closed and open positions. The invention comprises a rail system (1) for reducing the opening distance of the system, and for carrying the door panels thereon and thus providing motion to the door panels, and allowing the movable rails to be retracted or extended within the door mechanism by reducing the distance thereof; a movable panel hanger plate (2) used for adjusting the door panel up and down during the suspension operation and for providing motion in the opening-closing direction; a guide rail carrier system (3) used for guiding the rail system (1) when the body is fixed; a support force stabilizer (4) used for counterweight balancing during complete opening and complete closing of the door panel with the movement of the rail system (1); a motor motion system (5), the motor motion system (5) operates in a section which has been reduced by a 50% motion displacement restriction but still allows 100% opening of the door panels;, a door skate system motion mechanism (6) for moving the door skate (12) system after the interior safety door panels are closed and providing harmonious operation with the floor door; a balance plummet indicator (7) positioned on the floor door frame and interior safety automatic door and showing the plummet values of the fixed mounted door mechanisms; a mechanism frame (8) for carrying the system and performing the tasks of frame and cabin in addition to cap; a motion transmitter (9) transmitting motion between the pulley guide rail; a panel connection 1/1 hanger plate (10) mounted on the movable rail for carrying the panel in a movable manner and for providing connection to the rear first panel with 1/1 ratio; a safety plug contact (11) used for safety in the system; and a door skate (12) system transferring the motion to the panels.

[0052] The most important novelty in the present invention is provided by the elements of the rail system (1) and of the door skate system movement mechanism (6). In this feature, the absence of a single rail, and having a rail system (1), which shortens the elevator opening distance, provides saving space in the elevator and saves energy by facilitating maintenance and repair operations.

[0053] In another aspect of the invention, the door skate system motion mechanism (6) is the component providing movement to the door skate (12) system. In this way, the movement of the door skate system takes place not by a belt which is connected to the motor but by the door skate system motion mechanism (6). This feature allows the reduction of the operating distance, and at the same time ensures energy saving.

[0054] Figure 5, Figure 6, Figure 7, and Figure 8 show the front perspective, and rear, front, and side perspective views of the door skate system motion mechanism (6) located in the elevator system according to the invention.

[0055] The door skate system motion mechanism (6) comprises stabilizer pulleys (6.1) providing balance and strength to the system when the mechanism is opened, by making pressure on the support force stabilizer (4) from below and above; a first pulley (6.2) used for increasing the displacement distance of the support force stabilizer (4); a second pulley (6.3) for transferring the incoming movement to the door skate (12) system; a distance lever (6.4) for restricting the displacement distance; and a (6.5) for enabling the up-and-down movement of the system to be on a single line. By means of the above mentioned components, it is made possible to transfer the drive movement received from the motor to the door skate system motion mechanism (6), and to transfer the motion at the door skate system motion mechanism (6) to the door skate (12) system.

Claims

1. An elevator door system used in elevators for providing energy saving by means of an improved system that maintains a constant entrance distance between the building floor and the elevator cabin, and thus facilitates maintenance and repair operations, comprising:

• a rail system (1) that reduces the distance needed to be travelled for carrying the door panels thereon and thus for providing motion to the door panels, and allowing the movable rails to be retracted or extended within the door mechanism by reducing the distance thereof, and characterized in further comprising

• a door skate system motion mechanism (6) comprising a second pulley (6.3) located on said door skate system motion mechanism (6) for transferring the incoming movement to the door skate (12) system, and also comprising a first pulley (6.1) used for increasing the displacement distance of the support force stabilizer (4), and

• the rail system (1) having the same width length as with the elevator door entrance distance.

2. An elevator door system used in elevators according to claim 1, characterized in that the door skate system motion mechanism (6) comprises stabilizer pulleys (6.1) providing balance and strength to the system when the elevator door system is opened, by providing pressure on the support force stabilizer (4) from below and above.

3. An elevator door system used in elevators according to claim 1, characterized in that the door skate system motion mechanism (6) comprises a second pulley (6.3) located on said door skate system motion mechanism (6) for transferring the incoming movement to the door skate (12) system.

4. An elevator door system used in elevators according to claim 1, characterized in that the door skate system motion mechanism (6) comprises a distance lever (6.4) located on said door skate system motion mechanism (6) for restricting the displacement distance of the elevator door opening mechanisms.

5. An elevator door system used in elevators according to claim 1, characterized in that the door skate system motion mechanism (6) comprises a motion pin (6.5) located on said door skate system motion mechanism (6) for enabling the up-and-down movement of the system to be on a single line.

Ansprüche

1. Aufzugstürsystem, das in Aufzügen verwendet wird, um Energie durch ein verbessertes System zu sparen, das einen konstanten Eingangsabstand zwischen dem Gebäudeboden und der Aufzugskabine aufrechterhält und somit Wartungs- und Reparaturarbeiten erleichtert, umfassen:

• ein Schienensystem (1), das die Distanz reduziert, die zurückgelegt werden muss, um die Türpaneele darauf zu tragen und somit für die Bewegung der Türpaneele zu sorgen, und das es ermöglicht, dass die beweglichen Schienen innerhalb des Türmechanismus eingezogen oder ausgefahren werden können, indem ihre Strecke reduziert wird, und ferner umfassend,

• einen Bewegungsmechanismus (6) für das Torlaufsystem, der eine zweite Umlenkrolle (6.3) umfasst, die sich auf dem Bewegungsmechanismus (6) für das Torlaufsystem befindet, um die ankommende Bewegung auf das Torlaufsystem (12) zu übertragen, und der auch eine erste Umlenkrolle (6.1) umfasst, die zur Vergrößerung des Verschiebeabstands des Stützkraftstabilisators (4) verwendet wird, und

• das Schienensystem (1) hat die gleiche Breitenlänge wie der Eingangsabstand der Aufzugstür.

2. Aufzugstürsystem, das in Aufzügen nach Anspruch 1 verwendet wird, dadurch gekennzeichnet, dass der Bewegungsmechanismus (6) des Türschlittensystems Stabilisierungsrollen (6.1) umfasst, die dem System Gleichgewicht und Festigkeit verleihen, wenn das Aufzugstürsystem geöffnet wird, indem sie von unten und oben Druck auf den Stützkraftstabilisator (4) ausüben.

3. Aufzugstürsystem, das in Aufzügen nach Anspruch 1 verwendet wird, dadurch gekennzeichnet, dass der Bewegungsmechanismus (6) des Türschlittensystems eine zweite Umlenkrolle (6.3) umfasst, die sich an dem Bewegungsmechanismus (6) des Türschlittensystems befindet, um die ankommende Bewegung auf das Türschlittensystem (12) zu übertragen.

4. Aufzugstürsystem, das in Aufzügen nach Anspruch 1 verwendet wird, dadurch gekennzeichnet, dass der Bewegungsmechanismus (6) des Türschlittensystems einen Abstandshebel (6.4) umfasst, der sich an dem Bewegungsmechanismus (6) des Türschlittensystems befindet, um den Verschiebungsabstand der Aufzugstüröffnungsmechanismen zu begrenzen.

5. Aufzugstürsystem, das in Aufzügen nach Anspruch 1 verwendet wird, dadurch gekennzeichnet, dass der Bewegungsmechanismus (6) des Türschlittensystems einen Bewegungsstift (6.5) umfasst, der sich auf dem Bewegungsmechanismus (6) des Türschlittensystems befindet, um zu ermöglichen, dass die Auf- und Abwärtsbewegung des Systems auf einer einzigen Linie erfolgt.

Revendications

1. Un système de porte d'ascenseur utilisé dans les ascenseurs pour réaliser des économies d'énergie grâce à un système amélioré qui maintient une distance d'entrée constante entre le sol du bâtiment et la cabine de l'ascenseur, et facilite ainsi les opérations d'entretien et de réparation, comprenant :

• un système de rails (1) qui réduit la distance à parcourir pour porter les panneaux de porte et donc pour fournir un mouvement aux panneaux de porte, et qui permet aux rails mobiles d'être rétractés ou étendus à l'intérieur du mécanisme de la porte en réduisant leur distance, et caractérisé en ce qu'il comprend également,

• un mécanisme de mouvement du système de patins de porte (6) comprenant une deuxième poulie (6.3) située sur ledit mécanisme de mouvement du système de patins de porte (6) pour transférer le mouvement entrant au système de patins de porte (12), et comprenant également une première poulie (6.1) utilisée pour augmenter la distance de déplacement du stabilisateur de la force d'appui (4), et

• le système de rails (1) a la même largeur et la même longueur que la distance d'entrée de la porte de l'ascenseur.

2. Un système de porte d'ascenseur utilisé dans les ascenseurs selon la revendication 1, caractérisé par le fait que le mécanisme de mouvement du système de patin de porte (6) comprend des poulies stabilisatrices (6.1) qui assurent l'équilibre et la force du système lorsque le système de porte d'ascenseur est ouvert, en exerçant une pression sur le stabilisateur de la force d'appui (4) par le bas et par le haut.

3. Système de porte d'ascenseur utilisé dans les ascenseurs selon la revendication 1, caractérisé par le fait que le mécanisme de mouvement du système de patins de porte (6) comprend une deuxième poulie (6.3) située sur ledit mécanisme de mouvement du système de patins de porte (6) pour transférer le mouvement entrant au système de patins de porte (12).

4. Un système de porte d'ascenseur utilisé dans les ascenseurs selon la revendication 1, caractérisé par le fait que le mécanisme de mouvement du système de patins de porte (6) comprend un levier de distance (6.4) situé sur ledit mécanisme de mouvement du système de patins de porte (6) pour limiter la distance de déplacement des mécanismes d'ouverture de la porte de l'ascenseur.

5. Un système de porte d'ascenseur utilisé dans les ascenseurs selon la revendication 1, caractérisé par le fait que le mécanisme de mouvement du système de patin de porte (6) comprend un axe de mouvement (6.5) situé sur ledit mécanisme de mouvement du système de patin de porte (6) pour permettre le mouvement de montée et de descente du système sur une seule ligne.

Drawing