阅读说明：本技术 一种可降解塑料包装袋的自动打结叠放装置 (Automatic knotting and stacking device for degradable plastic packaging bags ) 是由 陈可夏 陈通达 陈通庆 陈通子 于 2020-12-14 设计创作，主要内容包括：本发明涉及包装袋制袋技术领域,且公开了一种可降解塑料包装袋的自动打结叠放装置,包括工作台,工作台的下表面对称固定连接有支撑板,工作台的上表面转动安装有多个均匀分布的输送辊,工作台的上表面固定安装有与输送辊相对应的自动打结机,自动打结机顶部的中心处通过轴承座转动连接有螺纹杆,螺纹杆上套接有U型板,且U型板与螺纹杆螺纹连接,自动打结机的顶部固定连接有两个关于螺纹杆位置相对称的导向杆,U型板的水平部上对称开设有与导向杆匹配的导向孔。该可降解塑料包装袋的自动打结叠放装置,可以有效提高塑料包装袋自动打结的稳定性,而且方便打结后的塑料包装进行双工位互换叠放收集,从而有效提高塑料包装的加工效率。(The invention relates to the technical field of bag making of packaging bags, and discloses an automatic knotting and stacking device for degradable plastic packaging bags, which comprises a workbench, wherein a supporting plate is symmetrically and fixedly connected to the lower surface of the workbench, a plurality of uniformly distributed conveying rollers are rotatably mounted on the upper surface of the workbench, an automatic knotting machine corresponding to the conveying rollers is fixedly mounted on the upper surface of the workbench, a threaded rod is rotatably connected to the center of the top of the automatic knotting machine through a bearing seat, a U-shaped plate is sleeved on the threaded rod and is in threaded connection with the threaded rod, two guide rods with symmetrical positions relative to the threaded rod are fixedly connected to the top of the automatic knotting machine, and guide holes matched with the guide rods are symmetrically formed in the horizontal part of the U-shaped plate. This automatic knotting of degradable plastic packaging bag stacks device can effectively improve the automatic stability of knoing of plastic packaging bag, and the plastic packaging after conveniently knoing moreover carries out the duplex position interchange and stacks the collection to effectively improve plastic packaging's machining efficiency.)

1. The utility model provides an automatic knotting of degradable plastic packaging bag stacks device, includes workstation (1), its characterized in that: the automatic knotting machine is characterized in that a supporting plate (2) is symmetrically and fixedly connected to the lower surface of the workbench (1), a plurality of uniformly distributed conveying rollers (3) are installed on the upper surface of the workbench (1) in a rotating mode, an automatic knotting machine (4) corresponding to the conveying rollers (3) is installed on the upper surface of the workbench (1), a threaded rod (5) is rotatably connected to the center of the top of the automatic knotting machine (4) through a bearing seat, a U-shaped plate (6) is sleeved on the threaded rod (5), the U-shaped plate (6) is in threaded connection with the threaded rod (5), two guide rods (7) symmetrical about the position of the threaded rod (5) are fixedly connected to the top of the automatic knotting machine (4), guide holes matched with the guide rods (7) are symmetrically formed in the horizontal portion of the U-shaped plate (6), the guide rods (7) penetrate through the guide holes and are in sliding connection with the guide rods (7), the two ends of the U-shaped plate (6) are fixedly provided with U-shaped roller frames (8), the U-shaped roller frames (8) are rotatably provided with matched conveying compression rollers (9), one end of each U-shaped roller frame (8) is fixedly connected with a driving motor (10) through a rack, one end of each conveying compression roller (9) is fixedly connected with the output end of the driving motor (10), the roller shafts of the two conveying compression rollers (9) are fixedly sleeved with chain wheels (11), the two chain wheels (11) are sleeved with matched chains (12) together, two symmetrical stacking boxes (13) are arranged at the position of one end, far away from the conveying rollers (3), of the workbench (1), the two stacking boxes (13) are connected with the supporting plate (2) through a rotating positioning mechanism, and bearing plates (14) are fixedly connected to the side wall, close to the bottom end, of the supporting plate (2), and accept board (14) and be located and stack case (13) below setting, two stack two symmetrical riser (15) of fixedly connected with between case (13), be close to fixedly connected with commentaries on classics round pin (16) are located to the center of riser (15) lateral wall of workstation (1), and change round pin (16) and rotate with backup pad (2) that correspond through the bearing and be connected, another fixedly connected with turning handle (17) are located to the center of riser (15) lateral wall.

2. The automatic knotting and stacking device of degradable plastic packing bags according to claim 1, wherein: the rotary positioning mechanism comprises a sliding groove (18) formed in the side wall of the supporting plate (2), a positioning rod (19) is arranged in the sliding groove (18) in a sliding mode, two positioning sleeves (20) matched with the positioning rod (19) are symmetrically and fixedly mounted on the outer side wall of the stacking box (13), the positioning rod (19) is fixedly sleeved with a sliding block (21) matched with the sliding groove (18), a spring (22) is fixedly connected between the sliding block (21) and the bottom of the sliding groove (18), the spring (22) is sleeved on the positioning rod (19) in a sleeved mode, one end of the positioning rod (19) slides to penetrate through the bottom of the sliding groove (18) and extends outwards, and the other end of the positioning rod (19) penetrates through a groove opening of the sliding groove (18) and extends into one of the positioning sleeves (20) corresponding to the other end.

3. The automatic knotting and stacking device of degradable plastic packing bags according to claim 1, wherein: the ball groove has been seted up to the symmetry on the inner wall of guiding hole, and installs ball (23) that match in the ball groove, ball (23) keep away from the one end of ball groove tank bottom and pass the notch in ball groove and outwards extend, and with the outer pole wall roll connection of guide bar (7).

4. The automatic knotting and stacking device of degradable plastic packing bags according to claim 1, wherein: and a limiting cap (24) is fixedly arranged at one end of the guide rod (7) far away from the automatic knotting machine (4).

5. The automatic knotting and stacking device of degradable plastic packing bags according to claim 1, wherein: and one end of the threaded rod (5) far away from the bearing seat is fixedly connected with a handle (25).

6. The automatic knotting and stacking device of the degradable plastic packing bag of claim 2, wherein: the utility model discloses a riser (15) of going back to, including riser, runner, commentaries on classics round pin (16) are kept away from the center department fixedly connected with bull stick (26) of riser (15) one end, bull stick (26) run through backup pad (2) and are set up, and bull stick (26) rotate with backup pad (2) and be connected, fixedly connected with indicator lever (27) on the pole wall that bull stick (26) are close to the tip, symmetry fixedly connected with pin (28) on the lateral wall of backup pad (2), and indicator lever (27) offset the setting with one of them pin (.

7. The automatic knotting and stacking device of the degradable plastic packing bag of claim 2, wherein: and a pull ring (29) is fixedly arranged at one end of the positioning rod (19) far away from the positioning sleeve (20).

Technical Field

The invention relates to the technical field of bag making of packaging bags, in particular to an automatic knotting and stacking device for degradable plastic packaging bags.

Background

The environment-friendly plastic bags are short for various biodegradable plastic bags, and with the development of science and technology, various materials capable of replacing traditional PE plastics appear, including high polymer materials such as PLA, PHAs, PBA, PBS and the like. Can replace the traditional PE plastic bag. The environmental protection plastic bag is widely applied at present: supermarket shopping bags, rolling freshness protection bags, mulching films and the like have large-scale application examples in China.

The required manual labor is great when producing the degradable plastic packaging bags, so people make the automatic knotting and stacking device of the degradable plastic packaging bags to reduce the labor intensity of workers, but the stability of the existing plastic packaging bags in the automatic knotting process is poor, and the knotted plastic packaging bags need to be stopped when reaching a load state in the stacking and collecting process, so that the processing efficiency of the plastic packaging bags is easily influenced.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an automatic knotting and stacking device for degradable plastic packaging bags, which has the advantages of automatic knotting stability and convenience for double-station exchange and stacking and collection, and solves the problems that in the prior art, the stability of the plastic packaging bags in the automatic knotting process is poor, and the knotted plastic packaging bags need to be shut down when reaching a load state in the stacking and collection process, so that the processing efficiency is easily influenced.

(II) technical scheme

In order to realize the purposes of automatic knotting stability and convenient double-station exchange, stacking and collection, the invention provides the following technical scheme: an automatic knotting and stacking device of degradable plastic packaging bags comprises a workbench, wherein a supporting plate is symmetrically and fixedly connected to the lower surface of the workbench, a plurality of uniformly distributed conveying rollers are installed on the upper surface of the workbench in a rotating mode, an automatic knotting machine corresponding to the conveying rollers is installed on the upper surface of the workbench, a threaded rod is connected to the center of the top of the automatic knotting machine in a rotating mode through a bearing seat, a U-shaped plate is sleeved on the threaded rod and is in threaded connection with the threaded rod, two guide rods are fixedly connected to the top of the automatic knotting machine, the positions of the two guide rods are symmetrical with respect to the threaded rod, guide holes matched with the guide rods are symmetrically formed in the horizontal part of the U-shaped plate, the guide rods penetrate through the guide holes and are arranged and are in sliding connection with the guide holes, U-shaped roller frames are fixedly installed at the two ends of the U-shaped plate, and matched, the end part of one of the U-shaped roller frames is fixedly connected with a driving motor through a frame, one end of each conveying compression roller is fixedly connected with the output end of the driving motor, the roller shafts of the two conveying compression rollers are fixedly sleeved with chain wheels, and the two chain wheels are sleeved with matched chains together, two symmetrical stacking boxes are arranged at one end of the workbench far away from the conveying roller, the two stacking boxes are connected with the supporting plate through a rotary positioning mechanism, a bearing plate is fixedly connected on the side wall of the supporting plate close to the bottom end, the bearing plate is arranged below the stacking boxes, two symmetrical vertical plates are fixedly connected between the two stacking boxes, a rotating pin is fixedly connected at the center of the side wall of the vertical plate close to the workbench, and the rotating pin is rotatably connected with the corresponding supporting plate through a bearing, and the center of the other vertical plate side wall is fixedly connected with a rotating handle.

Preferably, the rotational positioning mechanism is including seting up the sliding tray on the backup pad lateral wall, it is provided with the locating lever, two to slide in the sliding tray symmetrical fixed mounting has with locating lever assorted position sleeve on the lateral wall of stacking the case, the fixed sliding block that has matcing with the sliding tray that cup joints on the locating lever, fixedly connected with spring between sliding block and the sliding tray tank bottom, and the spring housing establishes and sets up on the locating lever, the tank bottom and the outside extension that the sliding tray was run through in the one end slip of locating lever, the other end of locating lever passes the notch of sliding tray and extends to setting up in one of them corresponding position sleeve.

Preferably, the ball groove has been seted up to the symmetry on the inner wall of guiding hole, and installs the ball that matches in the ball groove, the ball is kept away from the one end of ball groove tank bottom and is passed the notch in ball groove and outwards extend, and with the outer pole wall roll connection of guide bar.

Preferably, one end of the guide rod, which is far away from the automatic knotting machine, is fixedly provided with a limiting cap.

Preferably, one end of the threaded rod, which is far away from the bearing seat, is fixedly connected with a handle.

Preferably, the center department fixedly connected with bull stick that riser one end was kept away from to the bull pin, the bull stick runs through the backup pad setting, and the bull stick rotates with the backup pad to be connected, fixedly connected with indicator lever on the pole wall that the bull stick is close to the tip, symmetry fixedly connected with pin on the lateral wall of backup pad, and indicator lever and one of them pin counterbalance set up.

Preferably, one end of the positioning rod, which is far away from the positioning sleeve, is fixedly provided with a pull ring.

(III) advantageous effects

Compared with the prior art, the invention provides an automatic knotting and stacking device for degradable plastic packaging bags, which has the following beneficial effects:

1. the automatic knotting and stacking device of the degradable plastic packaging bags comprises a workbench, a conveying roller, an automatic knotter, a threaded rod, a U-shaped plate, a guide rod, a U-shaped roller frame, a conveying compression roller, a driving motor, a chain wheel, a chain and a stacking box, wherein the threaded rod is rotated and is in sliding connection with the guide rod, so that the rotational freedom degree of the U-shaped plate is limited, the threaded rod can drive the U-shaped plate in threaded connection to lift when rotating, the U-shaped plate drives the U-shaped roller frame to lift synchronously, the distance between the conveying compression roller and the workbench is convenient to adjust, the conveying compression roller and the workbench are suitable for plastic packaging bags with different thicknesses, the plastic packaging bags are placed on the workbench and are convenient to be conveyed through the conveying roller, meanwhile, the driving motor is started to drive one conveying compression roller to rotate, the chain wheel is matched with the chain for transmission, and, the back is carried via the conveying roller to the plastic packaging bag, not only make things convenient for the plastic packaging bag to pass automatic knot tying machine automatically through carrying the compression roller, carry the compression roller moreover and can produce certain pressure to the plastic packaging bag at the rotation in-process, guarantee that the plastic packaging bag can not take place the offset when passing through automatic knot tying machine, thereby improve the automatic stability of knoing of plastic packaging bag, effectively guarantee the quality of knoing of plastic packaging bag, after the plastic packaging bag is knoed and is accomplished, automatic transport is to stacking the incasement and stack the collection automatically.

2. The automatic knotting and stacking device of the degradable plastic packaging bags comprises stacking boxes, a bearing plate, a vertical plate, a rotating pin, a rotating handle, a sliding groove, a positioning rod, a positioning sleeve, a sliding block and a spring, wherein when the plastic packaging bag in one stacking box reaches a collecting load, the positioning rod is pulled to drive the sliding block to slide along the sliding groove and compress the spring, so that the positioning rod is separated from the positioning sleeve, the rotating handle can drive the rotating pin to rotate, so that the two stacking boxes are subjected to position replacement, then the positioning rod is loosened, the spring drives the positioning rod to reset so as to be inserted into the corresponding positioning sleeve, so that the position of the transposed stacking box is conveniently locked, when the two stacking boxes are subjected to position replacement, the collected plastic packaging bags automatically fall onto the bearing plate, centralized collection is convenient, and the other empty stacking box can continue to collect and stack plastic packaging bags, the machine does not need to be stopped, so that the processing efficiency of the plastic packaging bag is effectively improved.

Drawings

Fig. 1 is a schematic structural view of an automatic knotting and stacking device for degradable plastic packaging bags according to the present invention;

FIG. 2 is a schematic structural view of a connecting part of two conveying press rollers of the automatic knotting and stacking device for degradable plastic packaging bags according to the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 1;

fig. 4 is an enlarged view of a portion B in fig. 1.

In the figure: 1 workbench, 2 supporting plates, 3 conveying rollers, 4 automatic knotting machines, 5 threaded rods, 6U-shaped plates, 7 guide rods, 8U-shaped roller frames, 9 conveying compression rollers, 10 driving motors, 11 chain wheels, 12 chains, 13 stacking boxes, 14 bearing plates, 15 vertical plates, 16 rotating pins, 17 rotating handles, 18 sliding grooves, 19 positioning rods, 20 positioning sleeves, 21 sliding blocks, 22 springs, 23 rolling balls, 24 limiting caps, 25 handles, 26 rotating rods, 27 indicating rods, 28 stop rods and 29 pull rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an automatic knotting and stacking device for degradable plastic packaging bags comprises a workbench 1, wherein a supporting plate 2 is symmetrically and fixedly connected to the lower surface of the workbench 1, a plurality of uniformly distributed conveying rollers 3 are rotatably mounted on the upper surface of the workbench 1, an automatic knotting machine 4 corresponding to the conveying rollers 3 is fixedly mounted on the upper surface of the workbench 1, a threaded rod 5 is rotatably connected to the center of the top of the automatic knotting machine 4 through a bearing seat, a U-shaped plate 6 is sleeved on the threaded rod 5, the U-shaped plate 6 is in threaded connection with the threaded rod 5, two guide rods 7 are fixedly connected to the top of the automatic knotting machine 4, the positions of the guide rods 5 are symmetrical, guide holes matched with the guide rods 7 are symmetrically formed in the horizontal part of the U-shaped plate 6, the guide rods 7 pass through the guide holes and are slidably connected with the guide rods 7, U-shaped roller frames 8 are fixedly mounted at the two, and the U-shaped roller frames 8 are rotatably provided with matched conveying compression rollers 9, the end part of one U-shaped roller frame 8 is fixedly connected with a driving motor 10 through a frame, one end of each conveying compression roller 9 is fixedly connected with the output end of the driving motor 10, the roller shafts of the two conveying compression rollers 9 are fixedly sleeved with chain wheels 11, the two chain wheels 11 are commonly sleeved with matched chains 12, two symmetrical stacking boxes 13 are arranged at the position of one end of the workbench 1 far away from the conveying rollers 3, the two stacking boxes 13 are connected with the supporting plate 2 through a rotating positioning mechanism, a bearing plate 14 is fixedly connected on the side wall of the supporting plate 2 close to the bottom end and is arranged below the stacking boxes 13, two symmetrical vertical plates 15 are fixedly connected between the two stacking boxes 13, a rotating pin 16 is fixedly connected at the center of the side wall of the vertical plate 15 close to the workbench 1, and the rotating pin 16 is rotatably connected with the corresponding supporting plate 2 through a bearing, the center of the side wall of the other vertical plate 15 is fixedly connected with a rotating handle 17, a threaded rod 5 is rotated, the U-shaped plate 6 in threaded connection is in sliding connection with a guide rod 7, so that the rotational freedom degree of the U-shaped plate 6 is limited, the threaded rod 5 can drive the U-shaped plate 6 in threaded connection to lift when rotating, the U-shaped plate 6 drives a U-shaped roller frame 8 to lift synchronously, the distance between a conveying compression roller 9 and a workbench 1 is convenient to adjust, the conveying compression roller is suitable for plastic packaging bags with different thicknesses, the plastic packaging bags are placed on the workbench 1 and are convenient to convey through a conveying roller 3, meanwhile, a driving motor 10 is started to drive one conveying compression roller 9 to rotate, a chain wheel 11 is matched with a chain 12 for transmission, the other conveying compression roller 9 is convenient to rotate synchronously and equidirectionally, after the plastic packaging bags are conveyed through the conveying roller 3, the plastic packaging bags are, and carry compression roller 9 and can produce certain pressure to plastic packaging bag at the rotation in-process, guarantee that plastic packaging bag can not take place the offset when passing through automatic knotter 4 to improve the automatic stability of knoing of plastic packaging bag, effectively guarantee plastic packaging bag's the quality of knoing, after the plastic packaging bag is knoed, automatic transport is to stacking the case 13 interior automatic stacking collection of carrying on.

The rotary positioning mechanism comprises a sliding groove 18 arranged on the side wall of the supporting plate 2, a positioning rod 19 is arranged in the sliding groove 18 in a sliding manner, positioning sleeves 20 matched with the positioning rod 19 are symmetrically and fixedly arranged on the outer side walls of the two stacking boxes 13, a sliding block 21 matched with the sliding groove 18 is fixedly sleeved on the positioning rod 19, a spring 22 is fixedly connected between the sliding block 21 and the bottom of the sliding groove 18 and sleeved on the positioning rod 19, one end of the positioning rod 19 penetrates through the bottom of the sliding groove 18 in a sliding manner and extends outwards, the other end of the positioning rod 19 penetrates through the notch of the sliding groove 18 and extends into one corresponding positioning sleeve 20, when a plastic packaging bag in one stacking box 13 reaches a collecting load, the positioning rod 19 is pulled to drive the sliding block 21 to slide along the sliding groove 18 and compress the spring 22, so that the positioning rod 19 is separated from the positioning sleeve 20, and the rotary handle 17 can drive, make two and stack case 13 and carry out the position replacement, then loosen locating lever 19, spring 22 drives locating lever 19 and resets and makes it and the inserting of corresponding position sleeve 20 close, thereby conveniently carry out the position locking to stacking case 13 after the transposition, two stack case 13 position when replacing, the plastic packaging bag of collection will fall to automatically on accepting the board 14, conveniently concentrate and collect, and another empty case 13 that stacks can continue to carry out the plastic packaging bag and stack the collection, need not to shut down the operation, thereby effectively improve the machining efficiency of plastic packaging bag.

The ball groove has been seted up to the symmetry on the inner wall of guiding hole, and installs the ball 23 that matches in the ball groove, and the one end that ball 23 kept away from the ball groove tank bottom passes the notch in ball groove and outwards extends, and with the outer pole wall roll connection of guide bar 7, reduces the frictional force between guide bar 7 and the guiding hole.

One end of the guide rod 7 far away from the automatic knotter 4 is fixedly provided with a limiting cap 24, so that the guide rod is convenient to limit and avoid being separated.

One end of the threaded rod 5 far away from the bearing block is fixedly connected with a handle 25, so that the rotation of the threaded rod 5 is conveniently controlled.

The center department fixedly connected with bull stick 26 that riser 15 one end was kept away from to bull pin 16, bull stick 26 runs through the setting of backup pad 2, and bull stick 26 rotates with backup pad 2 to be connected, and bull stick 26 is close to fixedly connected with indicator bar 27 on the pole wall of tip, symmetry fixedly connected with pin 28 on the lateral wall of backup pad 2, and indicator bar 27 offsets with one of them pin 28 and sets up, conveniently rotates the location for two stack case 13 can 180 degrees transposition fast.

The end of the positioning rod 19 far away from the positioning sleeve 20 is fixedly provided with a pull ring 29, which is convenient for driving the positioning rod 19 to slide.

To sum up, the automatic knotting and stacking device of the degradable plastic packaging bags rotates the threaded rod 5, the U-shaped plate 6 connected with the thread is in sliding connection with the guide rod 7, so that the rotational freedom degree of the U-shaped plate 6 is limited, therefore, the threaded rod 5 can drive the U-shaped plate 6 connected with the thread to lift when rotating, the U-shaped plate 6 drives the U-shaped roller frame 8 to lift synchronously, thereby conveniently adjusting the space between the conveying compression roller 9 and the workbench 1 to adapt to the plastic packaging bags with different thicknesses, the plastic packaging bags are placed on the workbench 1 to be conveniently conveyed through the conveying roller 3, meanwhile, the driving motor 10 is started to drive one conveying compression roller 9 to rotate, the chain wheel 11 is matched with the chain 12 to drive the other conveying compression roller 9 to rotate synchronously and in the same direction, after the plastic packaging bags are conveyed through the conveying roller 3, the conveying compression roller 9 is not only convenient for the plastic packaging bags to automatically, the conveying compression roller 9 can generate certain pressure on the plastic packaging bags in the rotating process, so that the plastic packaging bags are prevented from being subjected to position deviation when passing through the automatic knotting machine 4, the stability of automatic knotting of the plastic packaging bags is improved, the knotting quality of the plastic packaging bags is effectively guaranteed, and the plastic packaging bags are automatically conveyed into the stacking box 13 to be automatically stacked and collected after being knotted; when one of the plastic packaging bags in the stacking box 13 reaches the collection load, the positioning rod 19 is pulled to drive the sliding block 21 to slide along the sliding groove 18 and compress the spring 22, so that the positioning rod 19 is separated from the positioning sleeve 20, the rotating handle 17 is rotated to drive the rotating pin 16 to rotate, so that the two stacking boxes 13 are subjected to position replacement, then the positioning rod 19 is loosened, the spring 22 drives the positioning rod 19 to reset to enable the positioning rod 19 to be inserted into the corresponding positioning sleeve 20, the position of the stacking box 13 after the position replacement is convenient to lock, when the positions of the two stacking boxes 13 are replaced, the collected plastic packaging bags automatically fall onto the bearing plate 14, the centralized collection is convenient, the other empty stacking box 13 can continue to stack and collect the plastic packaging bags, the shutdown operation is not needed, and the processing efficiency of the plastic packaging bags is effectively improved.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.