阅读说明：本技术 一种织物绗缝机 (Fabric quilting machine ) 是由 塞尔吉奥·贝尔达·纳瓦罗 何塞·维森特·阿尔贝罗·纳瓦罗 于 2020-05-07 设计创作，主要内容包括：本发明涉及一种织物绗缝机,包括至少三对驱动辊,织物可在驱动辊之间通过,一对辊为主动辊对,其余辊对为从动辊对,产生缝制区域和缝制后区域。每个辊对由两个相对设置的辊组成,两个辊与一组链条和链轮相关联,以使辊之间彼此以相反方向旋转。该机器还包括与成对的驱动辊相关联的气缸,用于改变棍对之间的距离,用于保持辊对彼此之间平行的稳定杆,缝纫头,以及用于独立控制所有成对的驱动辊和缝纫头的控制器,在缝制区域和缝制后区域对织物施加张力。(The invention relates to a fabric quilting machine, which comprises at least three pairs of driving rollers, wherein fabrics can pass between the driving rollers, one pair of rollers is a driving roller pair, and the other pairs of rollers are driven roller pairs, so that a sewing area and a sewn area are generated. Each roller pair consists of two oppositely disposed rollers associated with a set of chains and sprockets such that the rollers rotate in opposite directions to each other. The machine further includes an air cylinder associated with the pair of drive rollers for varying a distance between the pair of rollers, a stabilizer bar for maintaining the pair of rollers parallel to each other, a sewing head, and a controller for independently controlling all of the pair of drive rollers and the sewing head, applying tension to the fabric in the sewing area and the post-sewing area.)

1. A fabric quilting machine characterized by comprising:

-at least three pairs of driving rollers through which the fabric (1) can pass, one pair being a main roller pair (2), (2 '), the remaining pairs being a secondary roller pair (3), (3'), (4), (4 ') corresponding to said main roller pair (2), (2'), the arrangement being such as to form a sewing zone and a post-sewing zone, each pair consisting of two oppositely disposed rollers associated with a set of chains (5) and sprockets (6) so as to rotate in opposite directions with respect to each other, each pair of driving rollers being associated with a servomotor (7) and being provided with variable speed drives and gear reducers for varying the rotational speed and/or the degree of rotation of the rollers,

-a cylinder (8) associated with the drive roller for varying the distance between the pair of rollers,

-stabilizing bars (9) associated with each pair of drive rollers for maintaining the rollers in a parallel arrangement between the pairs,

-at least one independently arranged sewing head (10) arranged in the sewing area,

-a controller associated with each variable speed drive and servo motor (7) for controlling independently and simultaneously all the drive roller pairs and the sewing head (10) and varying the speed and rotation of the slave roller pairs (3), (3 '), (4 ') by controlling the master roller pairs (2), (2 ') and applying tension to the fabric in the sewing zone and the post-sewing zone.

2. The fabric quilting machine as claimed in claim 1, characterized in that the maximum tension applied to the fabric at the sewing region and the post-sewing region by said pair of slave rollers (3), (3 '), (4), (4') is 2000N.

3. The machine according to claim 1, characterized in that each pair of said driving rollers consists of a fixed roller (2), (3), (4) and a movable roller (2 '), (3'), (4 '), said fixed rollers (2), (3), (4) being driven by servomotors (7) and transmitting the motion to said movable roller (2'), (3 '), (4') through said chain (5) and said sprocket (6).

4. The machine according to claim 1, characterized in that each of said rollers (2), (2 '), (3 '), (4 ') has a diameter comprised between 75mm and 200 mm.

5. The machine according to claim 1, characterized in that each of said rollers (2), (2 '), (3 '), (4 ') has a wall thickness of 3-20 mm.

6. The fabric quilting machine as claimed in claim 1, characterized in that it is further provided with a pair of feed driving rollers (11), (11') and a stabilizer bar (9) connected to said cylinder (8), each feed driving roller (11) having a diameter of between 75mm and 200mm and a wall thickness of between 3mm and 20mm for introducing an unsewn fabric (1) into the machine and forming a pile region of the fabric (1) in front of a sewing region.

7. The fabric quilting machine of claim 6, characterized in that a sensor (12) is further provided for measuring the linear length of the pile area of the fabric (1) in front of the sewing area.

8. The fabric quilting machine of claim 1, further comprising a pair of removing driving rollers (13), (13') for removing the sewn fabric (1), wherein the pair of removing driving rollers are connected to the cylinder (8) and the stabilizer bar (9), each of the rollers has a diameter of between 75mm and 200mm and a wall thickness of between 3mm and 20mm, and is configured to drive the sewn fabric (1) to form a pile region of the sewn fabric (1) after the sewn region.

9. The fabric quilting machine of claim 8, characterized in that a sensor (14) is further provided for measuring a linear length of a pile area of the fabric (1) after a post-sewing area.

10. The fabric quilting machine of claim 1 wherein at least one free roller (15) is located before the quilting region and at least one free roller (15) is located after the post-quilting region.

11. The fabric quilting machine as claimed in claim 1, characterized in that each of the drive rollers (2), (2 '), (3 '), (4 '), (11 ') and (13), (13 ') is covered with rubber.

Background

Machines for sewing one or more layers of cloth, commonly known as quilting machines, are apparatuses for making fabrics, such as those commonly used for making seat cushions, duvets, and the like. These machines generally consist, among other elements, of a series of rollers on which the fabric to be sewn is aligned, one or more sewing heads performing pattern sewing on the fabric as it moves forward through the machine.

However, the known quilting machines cannot perform pattern sewing accurately and uniformly along the fabric, which results in irregularities of the ends of the fabric, and may cause an impression in the sewing pattern that continuously moves back and forth during the sewing operation of the fabric.

In addition, quilting machines known in the art have fixtures to hold the fabric in a stationary position while the sewing head moves over its surface to create a sewing pattern. This type of quilting machine is long-lived and therefore not cost-effective for high volume operations.

In this sense, the applicant of the present invention has found that the above-mentioned problems need to be solved by an innovative and efficient solution which enables the efficient sewing of a fabric by precisely controlling the tension exerted on the fabric to be sewn in each area of the machine, and which allows it to move back and forth in the quilting machine.

Disclosure of Invention

The quilting machine of the present invention is aimed at solving the above-mentioned drawbacks, which makes it possible to obtain a quilted fabric while performing pattern sewing in an accurate and uniform manner, preventing unnecessary irregularities or indentations on the fabric.

The fabric quilting machine comprises:

at least three pairs of driving rollers between which the fabric to be sewn can pass tightly. Each pair consists of two correspondingly disposed rollers, preferably a fixed roller and a movable roller, and is connected to a set of chains and sprockets to counter-rotate the rollers with respect to each other, and the fabric is movable in the fabric quilting machine. Each pair of drive rollers is connected to a servo motor with a gear reducer and a variable speed drive.

-a controller associated with each variable speed drive and servo motor for independently and simultaneously controlling all drive rollers and the sewing head, controlling, determining the speed and degree of rotation of each pair of drive rollers. Thus, the controller can precisely execute a preset sewing pattern, transmit necessary commands to the variable speed drive and the servo motor, make one pair of driving rollers become a master pair, execute the sewing pattern on the fabric, and the remaining driving rollers become slave pairs, so that the fabric can move forward or backward in the machine in synchronization with the movement of the master pair, producing the desired sewing pattern. The slave roller pair drives the fabric and applies tension thereto, and has a sewing region in front of the master roller pair and a sewing region behind the master roller pair. Advantageously, the tension exerted on the fabric by the pairs of rollers prevents the fabric from creasing, thus producing a precise and non-irregular sewing pattern, since the main roller pair always receives the fabric in the presence of tension, irrespective of the direction in which the fabric moves forward in the machine.

The air cylinders associated with the pairs of driving rollers at each end allow to select the distance between the pairs of rollers and the pressure exerted on the fabric.

Stabilizing bars connected to each pair of driving rollers, for keeping the rollers parallel to each other, preventing the fabric from being subjected to a greater pressure at one end of the machine than at the other, so that the tension exerted on the fabric to be quilted remains uniform over its entire width, ensuring the accuracy and precision of the sewing pattern.

-providing at least one separate sewing head in the sewing zone for sewing the fabric. The sewing head is moved vertically with respect to the direction of movement of the fabric in the machine to produce a sewing pattern.

Optionally, the fabric quilting machine of the present invention has two additional pairs of drive rollers, a feed drive roller pair and a removal drive roller pair, respectively, disposed before and after the slave roller pair, respectively, and connected to a stabilizer bar and an air cylinder, the functions of which are the same as those of the master roller pair and the slave roller pair described above. Thus, a pair of feed drive rollers introduces the unseated fabric into the machine and forms a pile area of fabric prior to the sewing area, where no tension is applied to the fabric.

Advantageously, the pile-up region before the sewing region is used to exclude external factors before the fabric quilting machine, such as the fabric production and handling processes before the quilting stage, from affecting the fabric to be sewn, which may avoid having to change the operations of subsequent sewing in the quilting machine as in the prior art. In order to determine the length of fabric present in the accumulation zone, the machine will optionally be equipped with a sensor for measuring the linear length of fabric in the accumulation zone, said sensor transmitting the measured length value to the controller so that it can act on the pair of feed drive rollers, varying their speed and rotation, to store the required amount of fabric in the accumulation zone before the sewing zone.

In a similar manner, optionally, a pair of removal drive rollers may be further provided to drive removal of the sewn fabric from the machine to create a pile area of the sewn fabric after the post-sewing area, thereby isolating the sewn fabric from external conditions behind the fabric quilting machine and preventing them from affecting the sewing operation. Optionally, a sensor is provided for measuring the linear length of the fabric, responsible for determining the length of fabric present in the accumulation zone after the sewing zone and transmitting the measured length value to the controller so that it can act on a pair of drive rollers driving the fabric being sewn, varying its speed and rotation to accumulate the desired amount of fabric in the sewing zone.

In order to provide a fabric with a large radius of curvature at the entrance and exit of the machine, the fabric quilting machine may further include at least one free roll before the sewing region and at least one free roll after the sewing region.

Finally, each roller of a fabric quilting machine is optionally covered with rubber or similar material to increase the coefficient of friction between the roller and the fabric, facilitate movement of the fabric within the machine, and minimize damage to the surface thereof.

In summary, the configuration of the fabric quilting machine enables accurate quilted patterns to be obtained, since the tension applied to the fabric can be always controlled and the main roller pair and the sub roller pair are coordinated, thereby minimizing defects, creases and irregularities in the fabric, and also enabling the fabric to move forward in both directions of the quilting machine to meet the requirements of the sewing mode or the production process itself.

Drawings

In addition, as will be described below, and to assist a better understanding of the characteristics of a preferred practical embodiment according to the invention, a set of drawings is attached as an integral part of the description, which describes, by way of illustration and not by way of limitation, the following:

fig. 1 is a cross-sectional view showing a fabric quilting machine and a fabric to be sewn according to an object of the present invention.

Fig. 2 shows a partial illustration of a perspective view of the rear of a fabric quilting machine.

Figure 3 shows a detailed schematic of a set of chains and sprockets used to transmit motion between the rollers making up each pair of rollers.

Fig. 4 shows a partial illustration of a front perspective view of a fabric quilting machine.

Detailed Description

As shown in fig. 1, 2 and 4, in the present preferred embodiment, the fabric quilting machine includes five pairs of drive rollers through which the fabric 1 formed of two outer layers and one or more intermediate fill layers passes closely. Each of the rollers constituting the pair of rollers rotates in the opposite direction to the other roller, driving the fabric 1 to be movable back and forth in the fabric quilting machine. As shown in fig. 2 and 4, the rollers 2, 3, 4, 11 and 13 are fixed by means of a gear reducer and a variable speed drive and are connected to the servomotor 7, while the rollers 2 ', 3 ', 4 ', 11 ' and 13 ' are movable. A cylinder 8 is connected to each end of each pair of rolls and can vary the pressure exerted on the web 1 by varying the distance between the rolls.

Fig. 2 and 3 show in detail a set of chains 5 and sprockets 6 responsible for transmitting the movement of the fixed rollers 2, 3, 4, 11 and 13 to the movable rollers 2 ', 3 ', 4 ', 11 ' and 13 '.

As shown in fig. 1, 2 and 4, in one mode of operation of the fabric quilting machine, an unsewn fabric 1 is introduced through a lower portion thereof and moved vertically forward by the machine. The three free rollers 15 guide the movement of the fabric 1, increasing its radius of curvature, helping it to enter the machine smoothly, while the fabric 1 is driven by a pair of feed drive rollers 11, 11', creating a pile area of the fabric 1. As described above, the pile-up region can isolate the sewing operation from external conditions prior to entering the fabric quilting machine. A sensor 12, preferably a sensor roller, for measuring the linear length of the fabric to determine the amount of fabric 1 present in the accumulation zone, after which this information is sent to a controller to adjust the speed and degree of rotation of the pair of feed drive rollers 11, 11'.

Then, a pair of slave roller pairs 3, 3' drive the fabric 1, introducing the fabric 1 into a sewing area, in which one or more sewing heads 10 (up to 8 sewing heads) perform a sewing operation. The sewing head 10 is laterally and independently moved while the fabric 1 is vertically moved forward in both directions of the forward movement, thereby generating a sewing pattern. Advantageously, the use of multiple sewing heads can increase production speed.

Subsequently, the sewn fabric 1 is driven by the main roller pair 2, 2 'and then driven by the sub roller pair 4, 4' to enter the sewn region.

Up to this point, the pair of slave rollers 3, 3 ' and 4, 4 ' of the driving roller apply a maximum tension of 2000N to the fabric 1 at the sewing area and the post-sewing area, and at this time, the pair of master rollers 2, 2 ' always receive the tensed fabric, so that it is possible to ensure the accuracy and correct execution of a predetermined sewing pattern, preventing the fabric from being wrinkled during the forward and backward movement of the fabric 1.

Advantageously, as mentioned above, the controller can control all the pairs of rollers simultaneously, so that the main pair of rollers 2, 2 'performs the sewing pattern and the movement of driving and tensioning the fabric 1 from the pairs of rollers 3, 3', 4 'is synchronized with the driving of the main pair of rollers 2, 2'.

On the other hand, the pair of removing driving rollers 13, 13' drives the sewn fabric 1 after passing through the three free rollers 15, the three free rollers 15 increasing the radius of curvature of the sewn fabric 1, forming a pile area at the exit of the fabric quilting machine, in which a minimum tension is applied to the fabric 1, and making the sewing operation and the operation after the fabric quilting machine not affected by external factors. In this accumulation area, a sensor 14 for measuring the linear length of the fabric 1 is arranged, preferably a distance sensor, responsible for sending to the controller information related to the amount of fabric 1 accumulated in said area for adjusting a pair of driving rollers 13, 13' driving the sewn fabric 1.

As can be seen from the above figures, each pair of driving rollers is associated with a stabilizer bar 9, the stabilizer bar 9 serving to maintain the parallel position between the rollers of the pair, preventing the fabric 1 from being subjected to a greater pressure at one end of the machine than at the other, thus improving the quality of the sewing pattern performed.

Advantageously, the above arrangement allows the controller to act on the various servomotors 7 and variable speed drives to move the fabric 1 in two directions, i.e. forwards or backwards through the fabric quilting machine, according to the predetermined sewing pattern and production needs.

The rollers forming each transmission pair have a diameter of between 75mm and 200mm, preferably 140 mm, and a wall thickness of between 3mm and 20mm, preferably 8 mm. These dimensions may provide the roll with the stiffness needed to prevent vibration and deformation.

Finally, it should be pointed out that the driving rollers may be covered with rubber or similar material to increase the friction coefficient with the fabric 1 to be quilted, to facilitate the movement of the fabric 1 and to protect its surface.