Extensible multi-line checkweigher with frame

Abstract

The invention relates to the technical field of checkweighers, in particular to an extensible multi-line checkweigher with a frame, which comprises a weighing platform, conveying belts are arranged right above and obliquely above the weighing platform, cross beams are arranged on two sides of the two conveying belts, two connecting frames are mounted between the two cross beams on two sides of one conveying belt, and the two connecting frames are connected with the weighing platform. The two connecting frames located over the weighing table are connected with the weighing table through supporting pieces, two round rollers used for supporting the conveying belts are arranged between the conveying belts, the ends of the round rollers are rotationally connected with the cross beams, and a plurality of detachable hollow air bag strips are installed on the outer surfaces of the conveying belts at equal intervals. The air bag strip is arranged in the width direction of the conveying belt, the two ends of the air bag strip are open, and a reset piece used for enabling the air bag strip to restore to the original shape is installed in the air bag strip. Cylindrical or spherical objects are prevented from rolling randomly on the conveying belt to influence weight detection.

Description

Technical Field

[0001] The present invention is an extensible multi-line weight checker with a frame, belonging to the technical field of weight checkers. Background Art

[0002] A weight checker, also known as a weight sorter, is an automatic weight checking device widely used in production lines in industries such as pharmaceuticals, food, and chemicals. It can detect overweight and underweight unqualified products on the production line in real time and online. The weight checker eliminates the problems of long traditional inspection time and inability to continuously check weight, greatly improving the working efficiency of the weighing operation. The weight checker includes at least two belt conveyors connected end to end. One belt conveyor conveys items to another belt conveyor. The belt conveyor includes a looped conveyor belt. When the motor in the belt conveyor works, it drives the conveyor belt to rotate through a round roller. Then, the rotating conveyor belt realizes the conveyance of items. When the items have a cylindrical or spherical shape, since the surface of the conveyor belt is horizontal, the cylindrical or spherical products are likely to roll after moving onto the conveyor belt, affecting the normal use of weight checking. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an extensible multi-line weight checker with a frame to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention is realized through the following technical solutions: An extensible multi-line weight checker with a frame includes a weighing table. Above the weighing table and obliquely above it are provided conveyor belts. On both sides of the two conveyor belts are provided crossbeams. Between the two crossbeams on one side of one conveyor belt are installed two connecting frames. The two connecting frames above the weighing table are connected to the weighing table through support members. Between the conveyor belts are provided two round rollers for supporting the conveyor belts. The ends of the round rollers are rotatably connected to the crossbeams. On the outer surface of the conveyor belt are equidistantly installed a plurality of detachable hollow airbag strips. The airbag strips are arranged along the width direction of the conveyor belt. Both ends of the airbag strip are open. Inside the airbag strip is installed a restoring member for restoring the airbag strip to its original state.

[0005] Specifically, the restoring member includes a strip. Inside the lower part of the airbag strip is installed a strip. Both ends of the strip are connected and fixed with end caps. The two end caps are respectively installed at both ends of the airbag strip. In the middle of one side surface of the end cap is provided a ventilation hole. On the upper surface of the strip are installed a plurality of positioning sleeves. The plurality of positioning sleeves are equidistantly arranged along the length direction of the strip. Inside the positioning sleeve is installed a spring. One end of the spring extends outside the positioning sleeve and is connected and fixed with a support head. The support head is in contact with the inner wall of the airbag strip.

[0006] Specifically, a first plane is machined on one side of the airbag strip close to the conveyor belt, the strip is attached to the first plane, a second plane is machined on the outer surface of the end cap, and the second plane is attached to the first plane.

[0007] Specifically, a convex strip is connected and fixed to the outer surface of the airbag strip. The convex strip is arranged along the length direction of the airbag strip. The convex strip and the airbag strip are of an integrally formed structure. A plug-in groove is machined on the side of the convex strip facing away from the airbag strip. A plurality of plug-in strips matching the plug-in groove are equidistantly fixed on the outer surface of the conveyor belt, and the plug-in strips are inserted into the plug-in groove.

[0008] Specifically, the cross-section of the plug-in strip is "T"-shaped, and the cross-section of the plug-in groove is "T"-shaped.

[0009] Specifically, two symmetrically arranged frame plates are provided on the upper side of the conveyor belt on the upper side of the inclined weighing platform. The frame plates are arranged on the feeding side of the conveyor belt on the upper side of the inclined weighing platform. L-shaped rods are connected and fixed to the middle positions of the opposite sides of the two frame plates. The vertical parts of the L-shaped rods are connected and fixed to the cross beam. A rectangular groove is formed by downward depression on the upper surface of the frame plate. An extension plate is inserted into the rectangular groove. The upper end of the extension plate extends to the outside of the rectangular groove. Two threaded holes are opened on the opposite sides of the two frame plates. The threaded holes communicate with the rectangular groove. A positioning screw for restricting the relative position between the extension plate and the frame plate is threadedly connected in the threaded hole.

[0010] Specifically, a support arm is installed on one side of the weighing platform. The support arm is of a hollow structure and is of an L-shaped structure. A display is connected and fixed to the upper end of the vertical part of the support arm.

[0011] Specifically, one end of a round roller in the conveyor belt is connected and fixed to the output end of a servo motor. The servo motor is installed on the side of the cross beam facing away from the conveyor belt.

[0012] Specifically, the support member includes a connecting plate. Two horizontally arranged connecting plates are provided directly above the weighing platform. The two ends of the connecting plate are respectively connected and fixed to two connecting frames directly above the weighing platform. Two symmetrically arranged rib plates are installed between the two connecting plates. A vertical rod is installed at the middle position of the lower surface of the rib plate. The lower end of the vertical rod is connected and fixed to a bottom plate, and the bottom plate is installed on the upper surface of the weighing platform.

[0013] Advantages of the present invention:

[0014] 1. A rib is fixedly connected to the outer surface of the airbag strip, and a plug-in groove is formed in the rib along the length direction of the rib, so that a plurality of plug-in strips on the surface of the conveyor belt are respectively inserted into the plug-in grooves on the corresponding airbag strips, realizing the assembly of the airbag strips and the conveyor belt, facilitating the disassembly and assembly of the airbag strips and the conveyor belt. Since the plug-in strips are made of rubber material and the ribs are also made of rubber material, after the plug-in strips are inserted into the plug-in grooves, there is a large frictional force between the plug-in strips and the inner wall of the plug-in grooves, thereby preventing the plug-in strips from moving randomly out of the plug-in grooves.

[0015] 2. A first plane is machined at the inner bottom of the airbag strip, and the slat is installed on the first plane, thereby increasing the connection range between the slat and the airbag strip, making the second plane on the end cover fit with the first plane, thus facilitating the assembly of the end cover and the airbag strip. The end cover realizes the support for the end of the airbag strip, and at the same time facilitates restricting the slat within the airbag strip. Under the support of the spring, the support head contacts the inner wall of the airbag strip, keeping the airbag strip in a state with an internal cavity. At the same time, when the airbag strip is deformed by an object being squeezed and then the object is removed, the airbag strip returns to its original shape under the action of the spring's resilience force.

[0016] 3. When a cylindrical or spherical object is conveyed onto the conveyor belt, the cylindrical or spherical object will squeeze the airbag strip. At this time, the springs at the parts of the airbag strip squeezed by the cylindrical or spherical object are compressed, while the springs at the parts of the airbag strip not in contact with the cylindrical or spherical object are not compressed. Thus, the middle parts of multiple airbag strips in contact with the cylindrical or spherical object are compressed and the two end parts are not compressed. The air in the compressed airbag strips is discharged through the ventilation holes on the end cover. When the airbag strip returns to its original shape, air will enter the airbag strip through the ventilation holes. Thus, multiple airbag strips form a structure conforming to the surface shape of the cylindrical or spherical object, realizing the restriction of the position of the cylindrical or spherical object and preventing the cylindrical or spherical object from rolling randomly on the conveyor belt and affecting the weight inspection.

[0017] 4. According to the height of the object, adjust the length of the extension plate within the frame plate. Then, the height of the structure formed by the extension plate and the frame plate changes. After the structure formed by the extension plate and the frame plate meets the height requirement of the object, use the positioning screws to limit the relative position of the extension plate and the frame plate. Thus, it is applicable to the guiding and limiting of objects with different heights. The structure formed by the two extension plates and the frame plate restricts the movement trajectory of the object on the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 It is a schematic structural diagram of a stretchable multi-line weight checker with a frame according to the present invention;

[0020] Figure 2Schematic diagram of the assembly of the airbag strip, round roller and conveyor belt in a stretchable multi-line weighing scale with a frame according to the present invention;

[0021] Figure 3 For Figure 2 Enlarged view at position A in;

[0022] Figure 4 3D view of the conveyor belt in a stretchable multi-line weighing scale with a frame according to the present invention;

[0023] Figure 5 For Figure 4 Enlarged view at position B in;

[0024] Figure 6 Schematic diagram of the assembly of the convex strip and the airbag strip in a stretchable multi-line weighing scale with a frame according to the present invention;

[0025] Figure 7 For Figure 6 Enlarged view at position C in;

[0026] Figure 8 Schematic diagram of the assembly of the end cover and the slat in a stretchable multi-line weighing scale with a frame according to the present invention;

[0027] Figure 9 For Figure 8 Enlarged view at position D in;

[0028] Figure 10 Schematic diagram of the assembly of the frame plate, extension plate, cross beam and conveyor belt in a stretchable multi-line weighing scale with a frame according to the present invention;

[0029] Figure 11 Schematic diagram of the assembly of the extension plate and the frame plate in a stretchable multi-line weighing scale with a frame according to the present invention;

[0030] Figure 12 Schematic diagram of the assembly of the connecting plate and the weighing table in a stretchable multi-line weighing scale with a frame according to the present invention;

[0031] In the figure: 1. weighing table, 2. servo motor, 3. support arm, 4. display, 5. connecting frame, 6. cross beam, 7. round roller, 8. conveyor belt, 9. airbag strip, 10. end cover, 11. insertion strip, 12. convex strip, 13. insertion slot, 14. first plane, 15. slat, 16. positioning sleeve, 17. spring, 18. support head, 19. ventilation hole, 20. L-shaped rod, 21. positioning screw, 22. extension plate, 23. frame plate, 24. threaded hole, 25. connecting plate, 26. rib plate, 27. vertical rod, 28. bottom plate. Detailed implementation manners

[0032] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0033] Please refer to Figure 1 and Figure 12 , the present invention provides a technical solution: a stretchable multi-line weighing scale with a frame, including a weighing platform 1. One side of the weighing platform 1 is provided with a support arm 3. The support arm 3 is of a hollow structure and an L-shaped structure. The upper end of the vertical part of the support arm 3 is connected and fixed with a display 4. Above the weighing platform 1 and obliquely above it are provided with conveyor belts 8. On both sides of the two conveyor belts 8 are provided cross beams 6. Between the two cross beams 6 on both sides of one conveyor belt 8 are installed two connecting frames 5. Above the weighing platform 1 are provided two horizontally arranged connecting plates 25. The two ends of the connecting plates 25 are respectively connected and fixed with the two connecting frames 5 above the weighing platform 1. Between the two connecting plates 25 are installed two symmetrically arranged rib plates 26. In the middle position of the lower surface of the rib plate 26 is installed a vertical rod 27. The lower end of the vertical rod 27 is connected and fixed with a bottom plate 28. The bottom plate 28 is installed on the upper surface of the weighing platform 1. The bottom plate 28, the vertical rod 27, the rib plate 26 and the connecting plate 25 together play a role in connecting the weighing platform 1 and the two connecting frames 5 above the weighing platform 1. The connecting frame 5 obliquely above the weighing platform 1 is connected to other support frames.

[0034] Refer to Figures 1 - 3 , between the conveyor belts 8 are provided two round rollers 7 for supporting the conveyor belts 8. The ends of the round rollers 7 are rotatably connected to the cross beams 6. One end of one of the round rollers 7 inside the conveyor belt 8 is connected and fixed with the output end of the servo motor 2. The servo motor 2 is installed on the side of the cross beam 6 away from the conveyor belt 8. When the servo motor 2 works, it drives the round roller 7 to rotate, so as to achieve the purpose of driving the conveyor belt 8 to rotate.

[0035] Refer to Figures 1 - 7, a plurality of detachable hollow airbag strips 9 are equidistantly installed on the outer surface of the conveyor belt 8. The airbag strips 9 are arranged along the width direction of the conveyor belt 8. Both ends of the airbag strips 9 are open. A convex strip 12 is fixedly connected to the outer surface of the airbag strip 9. The convex strip 12 is arranged along the length direction of the airbag strip 9. The convex strip 12 and the airbag strip 9 are of an integrally formed structure. A plug-in groove 13 is machined on the surface of the convex strip 12 facing away from the airbag strip 9. The cross-section of the plug-in groove 13 is in a "T" shape. A plurality of plug-in strips 11 matching with the plug-in groove 13 are fixedly arranged equidistantly on the outer surface of the conveyor belt 8. The cross-section of the plug-in strip 11 is in a "T" shape. The plug-in strip 11 is inserted into the plug-in groove 13. A convex strip 12 is fixedly connected to the outer surface of the airbag strip 9, and a plug-in groove 13 arranged along the length direction of the convex strip 12 is opened on the convex strip 12, so that the plurality of plug-in strips 11 on the surface of the conveyor belt 8 are respectively inserted into the plug-in grooves 13 on the corresponding airbag strips 9, realizing the assembly of the airbag strips 9 and the conveyor belt 8, facilitating the disassembly and assembly of the airbag strips 9 and the conveyor belt 8. Since the plug-in strip 11 is made of rubber material and the convex strip 12 is also made of rubber material, after the plug-in strip 11 is inserted into the plug-in groove 13, there is a large frictional force between the plug-in strip 11 and the inner wall of the plug-in groove 13, thereby preventing the plug-in strip 11 from moving randomly out of the plug-in groove 13.

[0036] Refer to Figures 1 - 9 , a slat 15 is installed at the lower inner position of the airbag strip 9. Both ends of the slat 15 are fixedly connected with end caps 10. The two end caps 10 are respectively installed at both ends of the airbag strip 9. A ventilation hole 19 is opened at the middle position of one side surface of the end cap 10. A plurality of positioning sleeves 16 are installed on the upper surface of the slat 15. The plurality of positioning sleeves 16 are equidistantly arranged along the length direction of the slat 15. A spring 17 is installed in the positioning sleeve 16. One end of the spring 17 extends to the outside of the positioning sleeve 16 and is fixedly connected with a support head 18. The support head 18 is in contact with the inner wall of the airbag strip 9. A first plane 14 is machined on one side of the airbag strip 9 close to the conveyor belt 8. The slat 15 is attached to the first plane 14. A second plane is machined on the outer surface of the end cap 10. The second plane is attached to the first plane 14. The first plane 14 is machined at the inner bottom of the airbag strip 9, and the slat 15 is installed on the first plane 14, thereby increasing the connection range between the slat 15 and the airbag strip 9, making the second plane on the end cap 10 fit with the first plane 14, thereby facilitating the assembly of the end cap 10 and the airbag strip 9. The end cap 10 realizes the support of the end of the airbag strip 9, and at the same time facilitates the restriction of the slat 15 in the airbag strip 9. Under the support of the spring 17, the support head 18 is in contact with the inner wall of the airbag strip 9, keeping the airbag strip 9 in a state with an internal cavity. At the same time, when the airbag strip 9 is deformed by an object and the object is removed, the airbag strip 9 returns to its original state under the action of the resilience of the spring 17.

[0037] After the cylindrical or spherical article is conveyed onto the conveyor belt 8, the cylindrical or spherical article presses against the airbag strip 9. At this time, the spring 17 at the position where the airbag strip 9 is pressed by the cylindrical or spherical article is compressed, and the spring 17 at the position where the airbag strip 9 does not contact the cylindrical or spherical article is not compressed. As a result, the middle part of multiple airbag strips 9 in contact with the cylindrical or spherical article is compressed and the two end parts are not compressed. The air in the compressed airbag strip 9 is discharged through the ventilation holes 19 on the end cover 10. When the airbag strip 9 returns to its original state, air will enter the airbag strip 9 through the ventilation holes 19. Thus, multiple airbag strips 9 form a structure that conforms to the surface shape of the cylindrical or spherical article, realizing the limitation of the position of the cylindrical or spherical article and preventing the cylindrical or spherical article from rolling randomly on the conveyor belt 8 and affecting the weight inspection.

[0038] Refer to Figure 1 , Figure 10 and Figure 11 , there are two symmetrically arranged frame plates 23 on the upper side of the conveyor belt 8 on the upper side and obliquely above the weighing table 1. The frame plates 23 are arranged on the feeding side of the conveyor belt 8 on the upper side and obliquely above the weighing table 1. At the middle position of the opposite sides of the two frame plates 23, L-shaped rods 20 are fixedly connected. The vertical part of the L-shaped rod 20 is fixedly connected to the cross beam 6. The upper surface of the frame plate 23 is recessed downward to form a rectangular groove. An extension plate 22 is inserted into the rectangular groove. The upper end of the extension plate 22 extends outside the rectangular groove. Two threaded holes 24 are opened on the opposite sides of the two frame plates 23. The threaded holes 24 communicate with the rectangular groove. A positioning screw 21 for restricting the relative position between the extension plate 22 and the frame plate 23 is threadedly connected in the threaded holes 24. According to the height of the article, the length of the extension plate 22 in the frame plate 23 is adjusted. Furthermore, the height of the structure formed by the extension plate 22 and the frame plate 23 changes. When the structure formed by the extension plate 22 and the frame plate 23 meets the height requirement of the article, the relative position between the extension plate 22 and the frame plate 23 can be restricted by using the positioning screw 21. Thus, it is applicable to the guiding and limiting of articles with different heights. The structure formed by the two extension plates 22 and the frame plate 23 restricts the movement trajectory of the article on the conveyor belt 8.

[0039] Although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-line checkweigher with an extendable frame, comprising a weighing platform (1), characterized in that: A conveyor belt (8) is provided directly above and obliquely above the weighing platform (1), and a crossbeam (6) is provided on both sides of the two conveyor belts (8). Two connecting frames (5) are installed between the two crossbeams (6) on both sides of one conveyor belt (8), and the two connecting frames (5) located directly above the weighing platform (1) are connected to the weighing platform (1) through a supporting member. Two rollers (7) for supporting the conveyor belt (8) are provided between the conveyor belts (8), and the ends of the rollers (7) are rotatably connected to the crossbeam (6). A plurality of detachable hollow airbag strips (9) are equidistantly installed on the outer surface of the conveyor belt (8), and the airbag strips (9) are arranged along the width direction of the conveyor belt (8). Both ends of the airbag strips (9) are open, and a reset member for restoring the airbag strip (9) to its original state is installed in the airbag strip (9).

2. The extendable multi-line checkweigher with frame according to claim 1, characterized in that: The reset member comprises a slat (15), wherein the slat (15) is installed at a lower position inside the airbag strip (9), and both ends of the slat (15) are connected and fixed with end covers (10), and the two end covers (10) are respectively installed at the two ends of the airbag strip (9), and a vent hole (19) is opened at a middle position of one side of the end cover (10), and a plurality of positioning sleeves (16) are installed on the upper surface of the slat (15), and the plurality of positioning sleeves (16) are arranged equidistantly along the length direction of the slat (15), and a spring (17) is installed in the positioning sleeve (16), and one end of the spring (17) extends to the outside of the positioning sleeve (16) and is connected and fixed with a support head (18), and the support head (18) is in contact with the inner wall of the airbag strip (9).

3. The extendable multi-line checkweigher with frame according to claim 2, characterized in that: A first plane (14) is processed on one side of the airbag strip (9) close to the conveyor belt (8), and the strip (15) is in contact with the first plane (14). A second plane is processed on the outer surface of the end cover (10), and the second plane is in contact with the first plane (14).

4. The extendable multi-line checkweigher with frame according to claim 1, characterized in that: The outer surface of the airbag strip (9) is connected and fixed with a convex strip (12), the convex strip (12) is arranged along the length direction of the airbag strip (9), the convex strip (12) and the airbag strip (9) are an integrally formed structure, the side of the convex strip (12) facing away from the airbag strip (9) is processed with a plug-in groove (13), and the outer surface of the conveyor belt (8) is fixed with a plurality of plug-in strips (11) matching the plug-in grooves (13) at equal intervals, and the plug-in strips (11) are inserted into the plug-in grooves (13).

5. The extendable multi-line checkweigher with frame according to claim 4, characterized in that: The cross section of the plug-in strip (11) is in the shape of a letter "T", and the cross section of the plug-in slot (13) is in the shape of a letter "T".

6. The extendable multi-line checkweigher with frame according to claim 1, characterized in that: Two symmetrically arranged frame plates (23) are provided on the upper side of the conveyor belt (8) on the oblique upper side of the weighing platform (1). The frame plates (23) are arranged on the feeding side of the conveyor belt (8) on the oblique upper side of the weighing platform (1). An L-shaped rod (20) is connected and fixed to the middle position of the back sides of the two frame plates (23). The vertical part of the L-shaped rod (20) is connected and fixed to the crossbeam (6). The upper surface of the frame plate (23) is recessed downward to form a rectangular groove. An extension plate (22) is inserted in the rectangular groove. The upper end of the extension plate (22) extends to the outside of the rectangular groove. Two threaded holes (24) are provided on the back sides of the two frame plates (23). The threaded holes (24) are connected to the rectangular groove. The threaded holes (24) are threadedly connected to positioning screws (21) for limiting the relative position of the extension plate (22) and the frame plate (23).

7. The extendable multi-line checkweigher with frame according to claim 1, characterized in that: A support arm (3) is installed on one side of the weighing platform (1); the support arm (3) is a hollow structure; the support arm (3) is an L-shaped structure; a display (4) is connected and fixed to the upper end of the vertical portion of the support arm (3).

8. The extendable multi-line checkweigher with frame according to claim 1, characterized in that: One of the ends of the rollers (7) in the conveyor belt (8) is connected and fixed to the output end of the servo motor (2), and the servo motor (2) is installed on a side of the crossbeam (6) facing away from the conveyor belt (8).

9. The extendable multi-line checkweigher with frame according to claim 1, characterized in that: The support member comprises a connecting plate (25), two connecting plates (25) arranged horizontally are provided just above the weighing platform (1), two ends of the connecting plate (25) are respectively connected and fixed to two connecting frames (5) just above the weighing platform (1), two symmetrically arranged rib plates (26) are installed between the two connecting plates (25), a vertical rod (27) is installed at the middle position of the lower surface of the rib plate (26), the lower end of the vertical rod (27) is connected and fixed to a bottom plate (28), and the bottom plate (28) is installed on the upper surface of the weighing platform (1).

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