Clamp and packaging machine

Abstract

The invention discloses a clamp and a packaging machine, which comprises a base, a turntable, a packaging bag and an actuator, and further comprises a fixed clamping plate, the movable clamping plate moves along an arc line and is in an attached or separated state with the fixed clamping plate, and the movable clamping plate is used for clamping the packaging bag in the attached state; the actuator can push the movable clamping plate to reciprocate; the transmission assembly converts linear motion of the actuator into arc motion of the movable clamping plate. The device has the beneficial effects that the structure of the movable clamping plate is re-designed, so that the movable clamping plate moves along an arc line to achieve opening and closing, the movable clamping plate can still avoid the moving path of the packaging bag when rotating by less than 90 degrees, the packaging bag can accurately move to the position between the movable clamping plate and the fixed clamping plate, and the placing accuracy of the packaging bag is improved; and through the design of the suction cups, the packaging bag can be sucked open while the packaging bag is fixed, so that the side wall of the packaging bag is in a separated state, and later feeding operation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging bag clamping, and more particularly to a clamp and a packaging machine. Background Art

[0002] Bag-feeding packaging machines are usually turntable-type and are usually used for packaging food. The packaging bags need to be fixed during operation. The existing packaging bag clamping components are usually divided into dynamic jaws and static jaws. The dynamic jaw and the static jaw are hinged, and the dynamic jaw rotates around the hinge to open and close. When the rotation range of the dynamic jaw is less than 90 degrees, it will interfere with the placement of the packaging bag. The packaging bag may be stuck outside the dynamic jaw and cannot be accurately moved to the position between the dynamic jaw and the static jaw. Therefore, a clamp is designed in which the dynamic jaw avoids interference with the packaging bag. Summary of the Invention

[0003] In view of the above defects, the present invention provides a clamp and a packaging machine to solve the above problems.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A clamp and packaging machine, comprising a base, a turntable, a packaging bag and an actuator, further comprising; fixed splint; The movable clamping plate moves along an arc and is in a state of being in contact with or separated from the fixed clamping plate, and is used to clamp the packaging bag in the contact state; The actuator can push the movable splint to move back and forth; The transmission assembly converts the linear motion of the actuator into the arc motion of the movable clamp.

[0005] Furthermore, the transmission assembly includes a bracket, which is provided with multiple pairs and fixedly connected to the turntable, a first bearing is provided at the upper end of the bracket, a fixed clamping plate is provided at the lower end of the bracket, a rotating shaft is installed on the inner ring of the first bearing, a first arc rod is installed at both ends of the rotating shaft, a rectangular hole is opened on the movable clamping plate, the first arc rod passes through the rectangular hole, and the end of the movable clamping plate away from the rectangular hole is used to clamp the packaging bag, a first compression spring is installed between the first arc rod and the movable clamping plate, and a blocking block is provided at one end of the first arc rod to prevent the movable clamping plate from falling; a connecting plate is installed at the telescopic end of the actuator, a first rack is provided on the connecting plate, and a first gear meshing with the first rack is installed on the rotating shaft, and the actuator extends to drive the movable clamping plate close to the fixed clamping plate.

[0006] Furthermore, it includes a suction cup, a second bearing is installed at the center of the rotating shaft, a half gear is installed on the outer ring of the second bearing, a second arc rod is installed on the half gear, the suction cup is installed on the second arc rod, a driving rod is installed on the connecting plate, a first tension spring is installed between the driving rod and the second arc rod, the first tension spring makes the suction cup stick to the packaging bag in a natural state, and a second rack that can engage with the half gear is provided on the driving rod, and the second arc rod is driven close to the packaging bag when the half gear is engaged with the second rack.

[0007] Furthermore, the movable clamping plate and the bracket are provided with holes for the first arc-shaped rod to pass through.

[0008] Furthermore, the transmission assembly also includes a rotating plate installed on the turntable, the rotating plate is divided into L-shaped plate 1 and L-shaped plate 2, the L-shaped plate 1 and L-shaped plate 2 are hinged to the turntable and arranged oppositely, a long hole is provided on the L-shaped plate 1, a pin passing through the long hole is installed on the L-shaped plate 2, a third tension spring is installed between the L-shaped plate 1 and the L-shaped plate 2, a hollow tube is installed at one end of the rotating plate, a connecting rod 1 is provided in the hollow tube, a third compression spring is installed between the connecting rod 1 and the hollow tube, a swing rod is hingedly installed on the hollow tube, the movable splint is fixedly connected to the swing rod, the fixed splint is fixedly connected to the hollow tube, a connecting rod 2 is provided between the swing rod and the connecting rod 1, and a roller is installed at one end of the connecting rod 1; The telescopic end of the actuator is equipped with a roller shaft that contacts the rotating plate, and the telescopic end of the actuator is equipped with an arc plate that contacts the roller; A first internally threaded tube is installed on the first L-shaped plate. The internal threads of the first internally threaded tube are connected with bolts, and the bolts are used to limit the distance between the first L-shaped plate and the second L-shaped plate.

[0009] Furthermore, the rotating plate and the hollow tube are in a hinged state, an external threaded shaft is hingedly installed on the hollow tube, a second internal threaded tube is hingedly installed on the rotating plate, and the external threaded shaft is inserted into the second internal threaded tube.

[0010] Furthermore, a pair of second arc-shaped rods may be provided and symmetrically arranged, and the movement directions of the second arc-shaped rods at different positions of the symmetrical arrangement are opposite.

[0011] Furthermore, the clamps are installed at the working end of the packaging machine, and the clamps are provided in several pairs.

[0012] The beneficial effects of the present invention are as follows: by redesigning the movable clamping plate structure, the movable clamping plate can be moved along an arc line to achieve opening and closing, so that when the movable clamping plate is rotated less than 90 degrees, it can still avoid the moving path of the packaging bag, so that the packaging bag can be accurately moved between the movable clamping plate and the fixed clamping plate, thereby improving the accuracy of packaging bag placement; The suction cup design can suck the bag apart while fixing it, so that the side walls of the bag are separated, which is convenient for subsequent feeding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a clamp and a packaging machine according to the present invention; Figure 2 is a schematic diagram of a first embodiment of a transmission assembly; Figure 3 It is a schematic diagram of a half gear; Figure 4 is a schematic side view of the bracket; Figure 5is a front view schematic diagram of the bracket; Figure 6 is a schematic diagram of a second embodiment of a transmission assembly; Figure 7 is a schematic top cross-sectional view of connecting rod 1; In the figure, 1, base; 2, turntable; 3, packaging bag; 4, actuator; 5, fixed splint; 7, movable splint; 8, transmission assembly; 811, bracket; 812, first bearing; 813, rotating shaft; 814, first arc rod; 815, rectangular hole; 816, first compression spring; 817, connecting plate; 818, first rack; 819, first gear; 821, suction cup; 822, second bearing; 823, half gear; 824, second arc rod; 825, driving rod; 826, first Extension spring; 827, second rack; 831, rotating plate; 8311, L-shaped plate one; 8312, L-shaped plate two; 832, long hole; 833, pin; 834, third extension spring; 835, hollow tube; 836, connecting rod one; 837, third compression spring; 838, swing rod; 839, connecting rod two; 840, roller; 841, roller shaft; 842, arc plate; 843, first internally threaded tube; 844, bolt; 845, externally threaded shaft; 846, second internally threaded tube. DETAILED DESCRIPTION

[0014] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0015] This application provides a clamp and packaging machine, please refer to Figure 1-Figure 7 : It includes a base 1, a turntable 2, a packaging bag 3 and an actuator 4, and also includes; Fixed splint 5; The movable clamping plate 7 moves along an arc and is in a state of contact or separation with the fixed clamping plate 5, and is used to clamp the packaging bag 3 in the contact state; The actuator 4 can push the movable splint 7 to move back and forth; The transmission assembly 8 converts the linear motion of the actuator 4 into the arc motion of the movable clamping plate 7.

[0016] Specifically, in actual application, the external mechanism moves the packaging bag 3 to the position of the fixed clamping plate 5, and then controls the actuator 4 to extend, which drives the movable clamping plate 7 to move through the action of the transmission component 8. Since the movable clamping plate 7 moves in an arc, it can avoid the moving path of the packaging bag 3. The base 1, turntable 2, packaging bag 3 and actuator 4 are in the existing technology. The turntable 2 can drive multiple sets of fixed clamping plates 5 and movable clamping plates 7 to rotate along the turntable 2, and the turntable 2 is driven by an external power source.

[0017] The first embodiment of the transmission assembly 8, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The transmission assembly 8 includes a bracket 811, which is provided with multiple pairs and is fixedly connected to the turntable 2. The upper end of the bracket 811 is provided with a first bearing 812, and the fixed splint 5 is provided at the lower end of the bracket 811. The inner ring of the first bearing 812 is installed with a rotating shaft 813, and first arc rods 814 are installed at both ends of the rotating shaft 813. A rectangular hole 815 is opened on the movable splint 7, and the first arc rod 814 passes through the rectangular hole 815. The end of the movable splint 7 away from the rectangular hole 815 is used to clamp the packaging bag 3, and a first compression spring 816 is installed between the first arc rod 814 and the movable splint 7. A blocking block is provided at one end of the first arc rod 814 to prevent the movable splint 7 from falling; a connecting plate 817 is installed at the telescopic end of the actuator 4, and a first rack 818 is provided on the connecting plate 817. A first gear 819 meshing with the first rack 818 is installed on the rotating shaft 813, and the actuator 4 extends to drive the movable splint 7 close to the fixed splint 5.

[0018] Specifically in actual application, the actuator 4 is provided with multiple and is fixedly connected to the turntable 2, the bracket 811 is fixedly connected to the turntable 2, the movable clamping plate 7 is initially in an open state, the bracket 811 and the movable clamping plate 7 are provided with multiple pairs, when the packaging bag 3 moves to the position on the side of the fixed clamping plate 5, the actuator 4 is controlled to extend, and the extension of the actuator 4 drives the connecting plate 817 and the first rack 818 to move in the direction of the first gear 819, driving the first gear 819 to rotate clockwise, and the first gear 819 drives the rotating shaft 813, the first arc-shaped rod 814, and the movable clamping plate 7 to be close to the fixed clamping plate 5, at this time, the packaging bag 3 can be clamped; When the actuator 4 is shortened, it can drive the movable clamping plate 7 away from the fixed clamping plate 5, thereby releasing the packaging bag 3; The first bearing 812 enables the rotating shaft 813 to rotate stably.

[0019] Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , including a suction cup 821, a second bearing 822 is installed at the center of the rotating shaft 813, a half gear 823 is installed on the outer ring of the second bearing 822, a second arc rod 824 is installed on the half gear 823, the suction cup 821 is installed on the second arc rod 824, a driving rod 825 is installed on the connecting plate 817, a first tension spring 826 is installed between the driving rod 825 and the second arc rod 824, the first tension spring 826 naturally makes the suction cup 821 stick to the packaging bag 3, and a second rack 827 that can engage with the half gear 823 is provided on the driving rod 825. When the half gear 823 is engaged with the second rack 827, the second arc rod 824 is driven to approach the packaging bag 3.

[0020] Specifically, in practical applications, in order to quickly open the packaging bag 3, the suction cup 821 needs to suck the packaging bag 3 and move it. Through the action of the second bearing 822, the second arc-shaped rod 824 can rotate freely relative to the rotating shaft 813. When the actuator 4 extends, it drives the connecting plate 817, the driving rod 825, and the second rack 827 to move toward the position of the half gear 823. Since the initial section of the driving rod 825 is not provided with teeth, the second rack 827 does not drive the second curved rod 824 to rotate during the initial movement of the driving rod 825. However, since the second curved rod 824 is not loaded, the driving rod 825 moves, and the first tension spring 826 is used to rotate 90 degrees clockwise, thereby driving the suction cup 821 to contact the packaging bag 3. The external device is controlled to generate negative pressure on the suction cup 821, thereby sucking one side of the packaging bag 3. After that, the control actuator 4 is extended again. At this time, the second rack 827 is engaged with the half gear 823, driving the half gear 823 to rotate counterclockwise. The half gear 823 drives the second curved rod 824 and the suction cup 821 that sucks the packaging bag 3 to rotate counterclockwise, thereby sucking the packaging bag 3 and making the opening of the packaging bag 3 open. The above operation is suitable for packaging bags 3 with thicker side walls. The side walls of the packaging bag 3 are relatively strong. The force generated by the deformation of the packaging bag 3 can resist the electrostatic adsorption force of the inner wall of the packaging bag 3 and the vacuum suction before opening. The movable splint 7 is arranged on both sides of the packaging bag 3, and the suction cup 821 is arranged in the middle of the packaging bag 3. The actuator 4 can be extended and retracted once to complete the operation of the movable splint 7 clamping and the suction cup 821 adsorbing and opening. The following steps describe in detail the process of the movable splint 7 clamping and the suction cup 821 adsorbing and opening. Step 1; the first curved rod 814 and the second curved rod 824 are initially in an open state, which is state 1; when the actuator 4 is extended, it simultaneously drives the first rack 818 and the drive rod 825 to move toward the direction of the packaging bag 3; The first rack 818 directly drives the first arc-shaped rod 814 to rotate 90 degrees clockwise through the first gear 819, and the first rack 818 is meshed with the upper end of the first gear 819; The driving rod 825 drives the second curved rod 824 to rotate 90 degrees clockwise through the first tension spring 826. At this time, the first curved rod 814 and the second curved rod 824 are in the same position; this is state 2; Step 2: As the actuator 4 continues to extend; The first rack 818 continues to drive the first curved rod 814 to rotate clockwise via the first gear 819. The first curved rod 814 passes through the holes in the bracket and the movable clamping plate 7. While maintaining the packaging bag 3, the movable clamping plate 7 and the first curved rod 814 can slide relative to each other to facilitate the rotation of the second curved rod 824. The second rack 827 meshes with the lower end of the half gear 823. The driving rod 825 drives the second rack 827 to engage with the lower end of the half gear 823, driving the second rack 827 to rotate counterclockwise. The first tension spring 826 is compressed and deformed, thereby driving the suction cup 821 to move counterclockwise, so that the packaging bag 3 is in the open state. The external opening device is then used to open the packaging bag 3. This is state three. When the actuator 4 is shortened, the above operation can be reversed to achieve reset.

[0021] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 5 The movable splint 7 and the bracket 811 are provided with holes for the first arc rod 814 to pass through.

[0022] Specifically in practical applications, the provision of the through hole facilitates the passage of the first arc-shaped rod 814 .

[0023] The second embodiment of the transmission assembly 8, referring to Figure 1 、 Figure 6 、 Figure 7 The transmission assembly 8 also includes a rotating plate 831 installed on the turntable 2. The rotating plate 831 is divided into an L-shaped plate 1 8311 and an L-shaped plate 2 8312. The L-shaped plate 1 8311 and the L-shaped plate 2 8312 are hinged to the turntable 2 and arranged opposite to each other. A long hole 832 is provided on the L-shaped plate 1 8311. A pin 833 passing through the long hole 832 is installed on the L-shaped plate 2 8312. A third tension spring 834 is installed between the L-shaped plate 1 8311 and the L-shaped plate 2 8312. A hollow tube 835 is mounted on one end of the rotating plate 831. A connecting rod 1 836 is mounted in the hollow tube 835. A third compression spring 837 is mounted between the connecting rod 1 836 and the hollow tube 835. A swing rod 838 is hingedly mounted on the hollow tube 835. The movable clamping plate 7 is fixedly connected to the swing rod 838. The fixed clamping plate 5 is fixedly connected to the hollow tube 835. A connecting rod 2 839 is mounted between the swing rod 838 and the connecting rod 1 836. A roller 840 is mounted on one end of the connecting rod 1 836. The telescopic end of the actuator 4 is equipped with a roller shaft 841 that contacts the rotating plate 831, and the telescopic end of the actuator 4 is equipped with an arc plate 842 that contacts the roller 840; A first internally threaded tube 843 is installed on the L-shaped plate 1 8311 . The first internally threaded tube 843 is internally threaded with a bolt 844 . The bolt 844 is used to limit the distance between the L-shaped plate 1 8311 and the L-shaped plate 2 8312 .

[0024] Specifically in actual application, the actuator 4 is provided with a fixed connection with the base 1, and the transmission assembly 8 can rotate around the turntable 2. When it rotates to the position of the actuator 4, the actuator 4 extends, driving the roller shaft 841 to move toward the rotating plate 831, so that the two rotating plates 831 rotate in opposite directions. Through the arrangement of the long hole 832 and the pin shaft 833, the L-shaped plate 1 8311 and the L-shaped plate 2 8312 can rotate synchronously, and the rotating plate 831 drives the hollow tube 835 to rotate, so that the hollow tube 835 is in an open state; at the same time, the extension of the actuator 4 also drives the arc plate 842 to contact with the roller 840, and the roller 840 drives the connecting rod 1 836 to move toward the position of the movable clamping plate 7, and finally makes the movable clamping plate 7 in an open state, which is convenient for clamping the packaging bag 3; When the actuator 4 is shortened, the third compression spring 837 causes the movable clamping plate 7 and the fixed clamping plate 5 to be in close contact with each other, and the third tension spring 834 causes the rotating plate 831 to actively rotate in opposite directions. Through the action of the first internally threaded tube 843 and the bolt 844, the distance between the L-shaped plate 1 8311 and the L-shaped plate 2 8312 can be limited.

[0025] Reference Figure 1 、 Figure 6 、 Figure 7 The rotating plate 831 and the hollow tube 835 are in a hinged state. An external threaded shaft 845 is hingedly installed on the hollow tube 835. A second internal threaded tube 846 is hingedly installed on the rotating plate 831. The external threaded shaft 845 is inserted into the second internal threaded tube 846.

[0026] Specifically, in practical applications, by setting the rotating plate 831 and the hollow tube 835 in a hinged state, the distance between the two movable clamping plates 7 can be adjusted to clamp packaging bags 3 of different widths.

[0027] Reference Figure 1 and Figure 2 The second arc-shaped rods 824 may be provided in a pair and symmetrically arranged, and the movement directions of the second arc-shaped rods 824 at different positions of the symmetrical arrangement are opposite.

[0028] Specifically in actual application, a pair of second arc-shaped rods 824 can be provided and symmetrically arranged, and the two suction cups 821 can be placed on both sides of the packaging bag 3 respectively, and sucked toward both sides synchronously. This method can more securely open the packaging bag 3 for later filling.

Claims

1. A clamp comprising a base (1), a turntable (2), a packaging bag (3) and an actuator (4), characterized in that: Also includes; fixed splint (5); The movable clamping plate (7) moves along an arc and is in a state of being in contact with or separated from the fixed clamping plate (5), and is used to clamp the packaging bag (3) in the contact state; The actuator (4) can drive the movable clamping plate (7) to move back and forth; The transmission assembly (8) converts the linear motion of the actuator (4) into the arc motion of the movable clamping plate (7).

2. A clamp according to claim 1, characterized in that: The transmission assembly (8) includes a bracket (811), the bracket (811) is provided with multiple pairs and is fixedly connected to the turntable (2), the upper end of the bracket (811) is provided with a first bearing (812), the fixed clamping plate (5) is provided at the lower end of the bracket (811), the inner ring of the first bearing (812) is provided with a rotating shaft (813), the two ends of the rotating shaft (813) are provided with a first arc rod (814), a rectangular hole (815) is opened on the movable clamping plate (7), the first arc rod (814) passes through the rectangular hole (815), and the movable clamping plate (7) is away from the rectangular hole (81 One end of the actuator (4) is used to clamp the packaging bag (3), a first compression spring (816) is installed between the first arc rod (814) and the movable clamping plate (7), and a blocking block is provided at one end of the first arc rod (814) to prevent the movable clamping plate (7) from falling; a connecting plate (817) is installed at the telescopic end of the actuator (4), a first rack (818) is provided on the connecting plate (817), and a first gear (819) meshing with the first rack (818) is installed on the rotating shaft (813), and the actuator (4) extends to drive the movable clamping plate (7) to approach the fixed clamping plate (5).

3. A clamp according to claim 2, characterized in that: The invention comprises a suction cup (821), a second bearing (822) is installed at the center of the rotating shaft (813), a half gear (823) is installed on the outer ring of the second bearing (822), a second arc rod (824) is installed on the half gear (823), the suction cup (821) is installed on the second arc rod (824), a driving rod (825) is installed on the connecting plate (817), a first tension spring (826) is installed between the driving rod (825) and the second arc rod (824), the first tension spring (826) makes the suction cup (821) stick to the packaging bag (3) in a natural state, a second rack (827) that can mesh with the half gear (823) is provided on the driving rod (825), and the second arc rod (824) is driven to approach the packaging bag (3) when the half gear (823) and the second rack (827) are meshed.

4. A clamp according to claim 3, characterized in that: The movable clamping plate (7) and the bracket (811) are provided with holes for the first arc-shaped rod (814) to pass through.

5. The clamp according to claim 1, characterized in that: The transmission assembly (8) further includes a rotating plate (831) hingedly mounted on the turntable (2), the rotating plate (831) being divided into an L-shaped plate 1 (8311) and an L-shaped plate 2 (8312), the L-shaped plate 1 (8311) and the L-shaped plate 2 (8312) being hingedly mounted on the turntable (2) and arranged opposite to each other, the L-shaped plate 1 (8311) being provided with a long hole (832), the L-shaped plate 2 (8312) being provided with a pin (833) passing through the long hole (832), and a third tension spring (834) being installed between the L-shaped plate 1 (8311) and the L-shaped plate 2 (8312). A hollow tube (835) is installed at one end of the rotating plate (831), a connecting rod (836) is provided in the hollow tube (835), a third compression spring (837) is installed between the connecting rod (836) and the hollow tube (835), a swing rod (838) is hingedly installed on the hollow tube (835), the movable splint (7) is fixedly connected to the swing rod (838), the fixed splint (5) is fixedly connected to the hollow tube (835), a connecting rod (839) is provided between the swing rod (838) and the connecting rod (836), and a roller (840) is installed at one end of the connecting rod (836); The actuator (4) has a roller shaft (841) mounted on the telescopic end thereof and in contact with the rotating plate (831). The actuator (4) has an arc-shaped plate (842) mounted on the telescopic end thereof and in contact with the roller (840). A first internally threaded tube (843) is installed on the first L-shaped plate (8311), and a bolt (844) is connected to the internal thread of the first internally threaded tube (843). The bolt (844) is used to limit the distance between the first L-shaped plate (8311) and the second L-shaped plate (8312).

6. A clamp according to claim 5, characterized in that: The rotating plate (831) and the hollow tube (835) are in a hinged state. An external threaded shaft (845) is hingedly mounted on the hollow tube (835). A second internal threaded tube (846) is hingedly mounted on the rotating plate (831). The external threaded shaft (845) is inserted into the second internal threaded tube (846).

7. The clamp according to claim 3, characterized in that: The second arc-shaped rods (824) may be provided in a pair and symmetrically arranged, and the movement directions of the second arc-shaped rods (824) at different positions of the symmetrical arrangement are opposite.

8. A packaging machine comprising a clamp according to any one of claims 1 to 7, characterized in that: The clamps are installed at the working end of the packaging machine, and there are several pairs of clamps.

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