阅读说明：本技术 改进的食物面团拉伸机 (Improved food dough stretching machine ) 是由 E·达拉丰塔纳 L·斯米德尔 于 2019-07-26 设计创作，主要内容包括：一种面团拉伸机(1),特别适用于拉伸比萨饼面团,其包括框架(11),与框架(11)相关联的是：待拉伸面团块的支承平面(14)；面团拉伸单元(2),布置在顶部并根据框架(11)的限定竖直轴线(Y)与支承平面(14)同轴；运动器件(15),用于使支承平面(14)朝向/远离面团拉伸单元(2)移动。面团拉伸单元(2)包括造形体(21),造形体(21)构造成与面团块接触；板(22),其中识别有多个径向凹槽(22a),每个径向凹槽可滑动地安置有用于面团块的造形元件(3)；运动学器件(4),其适用于移动造形元件(3)沿着径向凹槽(22a)朝向竖直轴线(Y)或远离轴线本身。运动学器件(4)包括：螺纹轴(41),螺纹轴(41)一端(41a)可操作地连接至机动器件(5),而相对端(41b)可旋转地与板(22)关联；中央芯部(42),设有固定在螺纹轴(41)上的螺母(42a)；多个杆(43),每个杆的一端(43a)铰接到造形元件(3)之一,相对端(43b)铰接到中央芯部(42)。运动学器件(4)适于当机动器件(5)使螺纹轴(41)旋转时实现多个杆(43)的圆规运动以及造形元件(3)随之朝向或远离竖直轴线(Y)的移位,引起中央芯部(42)取决于螺纹轴(41)的旋转方向的向下或向上移位。(Dough stretching machine (1), particularly for stretching pizza dough, comprising a frame (11), associated with which frame (11) are: a support plane (14) of the dough piece to be stretched; a dough stretching unit (2) arranged at the top and coaxial with the support plane (14) according to a defined vertical axis (Y) of the frame (11); movement means (15) for moving the support plane (14) towards/away from the dough stretching unit (2). The dough stretching unit (2) comprises a shaping body (21), the shaping body (21) is configured to contact the dough piece; a plate (22) in which a plurality of radial grooves (22a) are identified, each of which slidably houses a shaping element (3) for the dough piece; kinematic means (4) suitable for moving the shaped element (3) along the radial grooves (22a) towards the vertical axis (Y) or away from the axis itself. The kinematic device (4) comprises: a threaded shaft (41), one end (41a) of the threaded shaft (41) being operatively connected to the motorised means (5) and the opposite end (41b) being rotatably associated with the plate (22); a central core (42) provided with a nut (42a) fixed to the threaded shaft (41); a plurality of rods (43), each rod being hinged at one end (43a) to one of the shaping elements (3) and at the opposite end (43b) to the central core (42). The kinematic means (4) are adapted to effect, when the motorized means (5) rotate the threaded shaft (41), a compass movement of the plurality of rods (43) and a consequent displacement of the shaping element (3) towards or away from the vertical axis (Y), causing a downward or upward displacement of the central core (42) depending on the direction of rotation of the threaded shaft (41).)

1. A dough stretching machine (1), particularly suitable for stretching pizza dough, said dough stretching machine (1) comprising a frame (11) with which are associated:

-a support plane (14) for the dough piece to be stretched;

-a dough stretching unit (2), said dough stretching unit (2) being arranged on top and coaxial with said support plane (14) according to a vertical axis (Y) defined by said frame (11);

-movement means (15) for moving said support plane (14) towards/away from said dough stretching unit (2);

the dough stretching unit (2) comprises:

-a shaping body (21), the shaping body (21) being configured to be in contact with the dough piece;

-a plate (22) in which a plurality of radial grooves (22a) are identified, each radial groove (22a) slidably housing a shaping element (3) for the dough piece;

-kinematic means (4) adapted to move the shaping element (3) along the radial groove (22a) towards or away from the vertical axis (Y);

characterized in that said kinematic means (4) comprise:

-a threaded shaft (41) operatively connected at one end (41a) to the motorised means (5) and rotatably associated at the opposite end (41b) with the plate (22);

-a central core (42) provided with a nut (42a) fixed on the threaded shaft (41);

-a plurality of rods (43), each rod being hinged at one end (43a) to one of said shaping elements (3) and at the opposite end (43b) to said central core (42);

the kinematic means (4) are adapted to effect, when the motorized means (5) rotate the threaded shaft (41), a compass movement of the plurality of rods (43) and therefore a displacement of the shaping element (3) towards or away from the vertical axis (Y), causing a downward or upward displacement of the central core (42) according to the direction of rotation of the threaded shaft (41).

2. Dough stretching machine (1) according to the preceding claim, wherein said dough stretching unit (2) comprises means for displacing said shaped body (21), said shaped body (21) comprising at least one thrust pin (23), said thrust pin (23) having one end (23a) associated with said central core (42) and an opposite end (23b) adapted to push said shaped body (21) when said central core (42) is lowered, and an elastic unit (24) for controlling the displacement of said shaped body (21) when said shaped body (21) is moved by the abutment of said thrust pin (23).

3. Dough stretching machine (1) according to the preceding claim, wherein said elastic unit (24) comprises: a pin (241), said pin (241) being arranged through said plate (22) and having one end (241a) associated with said shaped body (21) and a handling head defined at the opposite end (241 b); an elastic element (242) arranged outside the pin (241), comprised between the manipulating head and the plate (22).

4. Machine (1) according to any one of the preceding claims, characterized in that said shaped body (21) comprises a forming plate provided with a plurality of projecting elements (21a), each having a profile directed towards said support plane (14) and adapted to come into contact with said dough piece to be stretched.

5. Machine (1) according to any one of the preceding claims, characterized in that each shaping element (3) comprises a sliding body (31), said sliding body (31) being arranged through the equivalent of said radial groove (22a) and having a first portion (31a) arranged above said plate (22) and hinged to one of said rods (43) and a second portion (31b) arranged below said plate (22) and associated with a shaped body (32) for stretching said dough piece.

6. Dough stretching machine (1) according to the preceding claim, wherein said forming body (32) has an L-shaped profile, wherein a larger side (322) associated with said second portion (31b) of said sliding body (31) and a smaller side (321) adapted to at least partially immerse into said dough piece are identified.

7. Method for stretching a dough piece using a dough stretching machine (1) according to any of claims 1 to 6, comprising the following operations:

-providing a dough piece to be stretched on the support plane (14);

-lifting the support plane (14) towards the dough stretching unit (2) according to the vertical direction (Y) until pressing the dough piece at least partially towards the shaping body (21) when configuring the dough stretching unit (2) in a position such that the plurality of rods (43) are arranged in the extended position and the shaping element (3) is arranged within the plate (22) perimeter;

-lowering the support plane (14) with respect to the shaped body (21) according to the vertical direction (Y);

-raising the central core (42) by means of rotating the threaded shaft (41) so that the shaping element (3) slides along the radial groove (22a) towards the vertical axis (Y);

-raising the support plane (14) towards the dough stretching unit (2) according to the vertical direction (Y) until the shaping element (3) is at least partially immersed in the dough piece;

-lowering the central core (42) by means of rotating the threaded shaft (41) to extend the plurality of rods (43) and moving the shaping element (3) towards the periphery of the plate (22) to stretch the dough piece.

8. Method according to the preceding claim, characterized in that said operation of lowering said support plane (14) with respect to said shaped body (21) is carried out simultaneously with said operation of raising said central core (42) by means of rotating said threaded shaft (41).

9. Method according to claim 7, characterized in that said operation of lowering said support plane (14) with respect to said shaped body (21) is carried out after said operation of raising said central core (42) by means of rotating said threaded shaft (41).