Bag unfolding mechanism and vacuum sealing machine

Abstract

The utility model discloses a bag unfolding mechanism and a vacuum sealing machine, belongs to the technical field of sealing machines, and can drive a movable seat through the matching of a second driving pin and a driving surface while sealing a packaging bag to achieve the effect of unfolding the packaging bag, so that the sealing quality of the vacuum sealing machine on the packaging bag can be improved. The bag unfolding mechanism comprises a supporting seat; comprising a first supporting surface; the two movable seats are arranged on the first supporting surface in a sliding manner, and driving surfaces are arranged on the movable seats; the power telescopic piece is arranged on one side of the supporting base, a clamping piece is arranged at the end of the power telescopic piece and arranged above the movable base, two second driving pins corresponding to the two driving faces one to one are arranged on the lower surface of the clamping piece, and the lower ends of the second driving pins are in driving fit with the driving faces; the two movable seats are symmetrically arranged relative to the power telescopic rod, and the driving face is configured to be capable of driving the two movable seats to move at least in the direction away from each other when the power telescopic rod moves.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sealing machine equipment technical field especially, relates to a kind of bag unfolding mechanism and vacuum sealing machine. BACKGROUND

[0002] In the field of food packaging, plastic packaging bag is sealed by using hot melt technology, and when hot melt sealing is performed, an extrusion member is generally used to extrude the mouth of the plastic packaging bag between heating members, and the mouth of the plastic packaging bag is heated and hot melt sealed by the heating members.

[0003] At present, the extrusion member and the heating member mostly use a direct extrusion method to clamp and hot melt the mouth of the packaging bag, and when the mouth of the packaging bag is not flat, direct clamping can cause the mouth of the packaging bag to wrinkle, thereby resulting in poor sealing quality of the packaging bag. SUMMARY

[0004] The utility model aims at solving the above-mentioned problem and provides a kind of bag unfolding mechanism and vacuum sealing machine.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a bag unfolding mechanism comprising:

[0006] a support seat comprising a first support surface;

[0007] a movable seat comprising two movable seats slidingly arranged on the first support surface, and a driving surface arranged on the movable seat;

[0008] a power telescopic member arranged on one side of the support seat, and having a clamping member arranged at the end portion thereof, the clamping member being arranged above the movable seat, and the lower surface of the clamping member being provided with two second driving pins corresponding to the two driving surfaces, the lower end portion of the second driving pin being drivingly engaged with the driving surface;

[0009] The two movable seats are symmetrically arranged about the power telescopic rod, and the driving surface is configured to drive the two movable seats to move at least in the direction away from each other when the power telescopic rod moves.

[0010] Further, along the telescopic direction of the power telescopic rod, the driving surface comprises a straight line segment and an arc segment, the arc segment is bent away from the other end of the straight line segment towards the direction close to the other driving surface, and the arc segment is arranged on the side of the straight line segment away from the power telescopic rod.

[0011] Further, one end of the second driving pin is connected with the clamping member, and the other end is coaxially rotatably provided with a rolling member adapted to the driving surface.

[0012] Further, perpendicular to the direction of the first support surface, the movable seat is provided with an arc-shaped hole, the lower end portion of the second driving pin extends into the arc-shaped hole, and the driving surface is the side surface of the two arc-shaped holes away from each other.

[0013] Further, a first pin is arranged on the support base perpendicularly to the first support surface and located at one side of the driving surface, and a second slot is further arranged on the movable base and in guiding connection with the first pin, and the second slot extends away from the driving surface.

[0014] Further, the movable base is provided with a clamping jaw assembly at one end away from the power telescopic rod, and the clamping jaw assembly is used for clamping the packaging bag.

[0015] Further, the clamping jaw assembly comprises a second arm hingedly connected to the movable base, a rotating rod drivingly connected to the second arm, one of the end of the rotating rod and the second arm is provided with a first slot, and the other is provided with a first driving pin extending into the first slot, and when the clamping jaw assembly is in a clamping state, the length direction of the first slot is perpendicular to the telescopic direction of the power telescopic rod.

[0016] Further, the end of the second arm away from the hinged position is provided with a first clamping jaw, and a second clamping jaw is arranged on the movable base at one side of the second arm close to the power telescopic rod, and the end of the rotating rod is provided with a second arm drivingly connected to the first arm.

[0017] Further, the second clamping jaw and the second arm are detachably fixedly connected through a locking screw, and the second driving pin is arranged at the end of the locking screw.

[0018] Further, the application also provides a vacuum sealing machine comprising the bag unfolding mechanism, and further comprising two rotating discs arranged in parallel and at intervals, a plurality of vacuum chambers are uniformly arranged between the two rotating discs in the circumferential direction, and a plurality of the bag unfolding mechanisms are uniformly arranged in the vacuum chambers in the interval direction of the two rotating discs.

[0019] Compared with the prior art, the end of the movable base is provided with the clamping jaw assembly, the two side edges of the packaging bag can be clamped by the two clamping jaw assemblies on the two movable bases, the cover of the vacuum chamber seals the mouth of the chamber body, at this time, the cover of the vacuum chamber corresponds to the clamping member, the heating member is arranged on the cover, then the vacuum chamber is evacuated, thereby the air in the packaging bag is sucked, then the power telescopic rod is elongated, the clamping member is driven to move towards the cover, in the process of movement, the two movable bases can be driven away from each other by the second driving pin acting on the driving surface, thereby the packaging bag can be pulled to the two sides, it is guaranteed that the mouth of the packaging bag can be unfolded, and in the process of movement of the clamping member, the mouth of the packaging bag can be pressed to the heating member on the cover, the heating member is heated to seal, the movable base can be driven by the cooperation of the second driving pin and the driving surface while sealing the packaging bag, the effect of unfolding the packaging bag is achieved, thereby the sealing quality of the vacuum sealing machine to the packaging bag can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Structure diagram of the vacuum chamber in the vacuum sealing machine Figure 1 .

[0021] Figure 2 Structure diagram of the vacuum chamber in the vacuum sealing machine Figure 2 .

[0022] Figure 3 As shown in the structure diagram of the partial enlargement of A-1 in the utility model. Figure 2

[0023] As shown in the structure diagram of the partial enlargement of A-1 in the utility model. Figure 4 Figure 3 As shown in the structure diagram of the partial enlargement of A-1 in the utility model.

[0024] Figure 5 Structure diagram of the hidden chamber body in the vacuum chamber of the vacuum sealing machine Figure 3 .

[0025] Figure 6 Structure diagram of the bag unfolding mechanism.

[0026] Figure 7 As shown in the structure diagram of the partial enlargement of B-1 in the bag unfolding mechanism of the utility model. Figure 6

[0027] As shown in the structure diagram of the partial enlargement of C in the bag unfolding mechanism of the utility model when the clamping member and the movable seat are hidden. Figure 8 Figure 7 Structure diagram of the bag unfolding mechanism of the utility model.

[0028] Figure 9 Structure diagram of the bag unfolding mechanism of the utility model.

[0029] In the figure: 1, vacuum chamber; 10, chamber body; 11, chamber cover; 12, support rod; 2, bag unfolding mechanism; 201, first driving pin; 21, power telescopic member; 22, clamping member; 220, silica gel pad; 221, second driving pin; 222, rolling member; 23, support seat; 24, movable seat; 240, second slot; 241, driving surface; 2410, straight section; 2411, arc section; 242, second arm; 243, pin shaft; 245, first clamping jaw; 246, second clamping jaw; 25, first pin; 3, rotating rod; 31, first arm; 310, first slot; 201, connecting member; 5, rotating disc. DETAILED DESCRIPTION

[0030] ​​The utility model will be further described in detail in connection with the drawings. The drawings are simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the relevant components of the utility model.

[0031] Example one

[0032] Please refer to Figures 6-8 The technical scheme of the utility model is as follows: a bag unfolding mechanism 2 comprises:

[0033] A support seat 23 comprises a first support surface;

[0034] Two movable seats 4 are slidably arranged on the first support surface, and the movable seats are provided with driving surfaces 241;

[0035] A power telescopic member 21 is arranged on one side of the support seat 23, and the end portion is provided with a clamping member 22, which is arranged above the movable seat 24. The lower surface of the clamping member 22 is provided with two second driving pins 221 corresponding to the two driving surfaces 241. The lower end of the second driving pin 221 is drivingly connected with the driving surface 241.

[0036] The two movable seats are symmetrically arranged about the power telescopic rod, and the driving surface 241 is configured to drive the two movable seats to move at least in the direction away from each other when the power telescopic rod moves.

[0037] Specifically, it should be noted that Figures 1-5 The vacuum sealer comprises a plurality of vacuum chambers 1, and support rods 12 are arranged at both ends of the vacuum chambers 1. The support rods 12 are rotatably connected with two rotating discs 5 of the vacuum sealer. In the vacuum chamber 1, the vacuum chamber 1 comprises a chamber body 10 and a chamber cover 11, and a plurality of bag unfolding mechanisms 2 are arranged. Specifically, the bag unfolding mechanism 2 comprises a support seat 23, which is a rigid plate-shaped member and is detachably fixedly connected with the side wall of the vacuum chamber 1 and the chamber body 10. One plate surface of the support seat 23 is a first support surface. A power telescopic member 21 is arranged on the side wall of the chamber body 10 away from the chamber cover 11. Two movable seats 24 are symmetrically and spaced apart about the power telescopic member 21 on the first support surface. The movable seat 24 can be slidably connected with the first support surface. The end portion of the power telescopic rod is provided with a clamping member 22. The power telescopic rod can drive the clamping member 22 to move in the direction of the first support surface. The lower surface of the clamping member 22 is symmetrically provided with two second driving pins 221. The two movable seats 24 are provided with driving surfaces 241 adapted to the second driving pins 221. Figure 7In the initial state, the second driving pin 221 is located at one end of the driving surface 241. In the specific operation, the end of the movable seat 24 is provided with a clamping jaw assembly, and the two side edges of the packaging bag can be clamped by the two clamping jaw assemblies on the two movable seats 24. The cover 11 of the vacuum chamber 1 is sealed to the mouth of the chamber body 10. At this time, the cover 11 of the vacuum chamber 1 is in correspondence with the clamping piece 22, and the cover 11 is provided with a heating piece. Then, the vacuum chamber 1 is vacuumized, so that the air in the packaging bag is sucked. Then, the power telescopic piece 21 is elongated, and the clamping piece 22 is driven to move towards the cover 11. In the process of movement, the second driving pin 221 can drive the two movable seats 24 to move away from each other by acting on the driving surface 241, so as to pull the packaging bag to the two sides, so as to ensure that the mouth of the packaging bag can be flattened, and in the process of movement of the clamping piece 22, the mouth of the packaging bag can be pressed to the heating piece on the cover 11, and the heating piece is heated to seal the mouth. In this way, the movable seat 24 can be driven by the cooperation of the second driving pin 221 and the driving surface 241 while sealing the mouth of the packaging bag, so as to achieve the effect of unfolding the packaging bag, thereby improving the sealing quality of the packaging bag.

[0038] Further, as a specific embodiment, the clamping piece 22 is provided with a silica gel pad 220. By providing the silica gel pad 220, the surface of the packaging bag can be protected during hot pressing, and the pressure can be balanced and buffered to avoid uneven material surface or damage caused by uneven pressure.

[0039] Further, as a specific embodiment, the power telescopic piece 21 can be any one of a pneumatic telescopic rod, an electric telescopic rod and a hydraulic telescopic rod, preferably a pneumatic telescopic rod and an electric telescopic rod.

[0040] Further, as a specific embodiment, referring to Figure 7 , Further, as a specific embodiment, referring to Figure 8 , along the telescopic direction of the power telescopic rod, the driving surface 241 comprises a straight line segment 2410 and an arc segment 2411. The arc segment 2411 is bent away from one end of the straight line segment 2410 towards the other driving surface 241, and the arc segment 2411 is arranged on the side of the straight line segment 2410 away from the power telescopic rod. Specifically, the driving surface 241 is arranged on the side away from each other of the two second driving pins 221. In the initial state, the second driving pin 221 corresponds to the straight line segment 2410. When the power telescopic rod is elongated, the second driving pin 221 can move from the straight line segment 2410 to the arc segment 2411, so as to drive the movable seat 24 to the two sides by the arc segment 2411.

[0041] Further, as a preferred embodiment, one end of the second driving pin 221 is connected with the clamping member 22, and the other end is coaxially provided with a rolling member 222 which is adapted to the driving surface 241. Specifically, the rolling member 222 is preferably a rolling bearing. By providing the rolling member 222, the sliding friction between the driving surface 241 and the second driving pin 221 can be converted into rolling friction, thereby reducing the friction and the wear, and prolonging the service life of the driving surface 241 and the second driving pin 221.

[0042] Further, as a preferred embodiment, with reference to Figure 7 、 Figure 8 , the movable seat 24 is provided with an arc-shaped hole in a direction perpendicular to the first supporting surface, the lower end of the second driving pin 221 extends into the arc-shaped hole, and the driving surface 241 is a side surface of the arc-shaped hole which is away from the other side surface. Specifically, by providing the arc-shaped hole and the driving surface 241 as a side surface of the arc-shaped hole, the arc-shaped hole further includes an inner side surface which is parallel to the driving surface 241. By cooperating the inner side surface with the second driving pin 221, when the power telescopic rod is retracted, the movable seat 24 can be driven to return to the direction of approaching each other by the cooperation of the inner side surface of the arc-shaped hole and the second driving pin 221, thereby ensuring that the two movable seats 24 can return, and ensuring the effective performance of the next bag opening operation.

[0043] Further, as a specific embodiment, in a direction perpendicular to the first supporting surface, the supporting seat 23 is provided with a first pin 25 which is located at one side of the driving surface 241, and the movable seat 24 is further provided with a second slot 240, the first pin 25 is guided and cooperated with the second slot 240, and the second slot 240 extends in a direction away from the driving surface 241. Specifically, the second slot 240 is linearly arranged and perpendicular to the extension direction of the power telescopic rod. By cooperating the first pin 25 with the second slot 240, the movable seat 24 can be limited in the extension direction of the power telescopic rod, and the movable seat 24 can be ensured to move in a direction perpendicular to the extension direction of the power telescopic rod, thereby ensuring the performance of the bag opening operation.

[0044] Further, as a specific embodiment, the end of the movable seat 24 which is away from the power telescopic rod is provided with a clamping jaw assembly which is used for clamping the packaging bag.

[0045] Further, as a specific embodiment, with reference to Figure 3 、 Figure 4 、 Figure 7The specific structure of the clamping jaw assembly is that the clamping jaw assembly comprises a second arm 242 hingedly connected to the movable seat 24, a rotating rod 3 drivingly connected with the second arm 242, and one of the end of the rotating rod 3 and the second arm 242 is provided with a first strip-shaped hole 310, and the other is provided with a first driving pin 201 extending into the first strip-shaped hole 310. When the clamping jaw assembly is in the clamping state, the length direction of the first strip-shaped hole 310 is perpendicular to the telescopic direction of the power telescopic member 21.

[0046] Specifically, the second arm 242 is hingedly connected to the movable seat 24 through a pin shaft 243, the second arm 242 can rotate around the pin shaft 243, and the rotating rod 3 can drive the second arm 242 to rotate around the pin shaft 243, thereby realizing the opening and closing of the clamping jaw assembly. By adaptively arranging the first driving pin 201 and the first strip-shaped hole 310 on the rotating rod 3 and the second arm 242, and by extending the first driving pin into the first strip-shaped hole 310, the second arm 242 is driven to rotate when the rotating rod 3 rotates, thereby realizing the opening and closing of the clamping jaw assembly. When the clamping jaw assembly is closed, the length direction of the first strip-shaped hole 310 is perpendicular to the telescopic direction of the power telescopic member 21, thereby ensuring that the first driving pin 201 can slide in the first strip-shaped hole 310 when the movable seat 24 expands outward, and ensuring the smooth expansion of the movable seat 24.

[0047] Further, as a specific embodiment, reference is made to Figures 3-7 , the end of the second arm 242 away from the hinged position is provided with a first clamping jaw 245, and the movable seat 24 is provided with a second clamping jaw 246 on the side close to the power telescopic rod. The end of the rotating rod 3 is provided with the second arm 242, and the second arm 242 is drivingly connected with the first arm 31.

[0048] Specifically, as a preferred embodiment, the axis of the rotating rod 3 is perpendicular to the first support surface, and the first arm 31 is arranged on the upper side of the support seat 23. The upper end of the first arm 31 is non-rotationally connected with the upper end of the rotating rod 3, and the first arm 31 can be rotated when the rotating rod 3 rotates. As a specific embodiment, the first strip-shaped hole 310 is arranged on the first arm 31 and extends along the length direction of the first arm 31. The first driving pin is arranged on the end of the second arm 242, and the rotating rod 3 can drive the second arm 242 to rotate through the first arm 31 when the rotating rod 3 rotates, thereby achieving the opening and closing effect.

[0049] Further, as a preferred embodiment, reference is made to Figure 4 , Figure 7 The second clamping jaw 246 is detachably fixedly connected with the second arm 242 through a locking screw, and the second driving pin 221 is arranged on the end of the locking screw. By this arrangement, the overall structure can be simplified.

[0050] It should be noted that the rotating rod 3, i.e. the rod capable of rotating around its own axis, can be driven by any existing means such as a driving motor, a crank and connecting rod mechanism, etc., which is not limited here.

[0051] Embodiment two

[0052] The application also provides a vacuum sealing machine, referring to Figure 1 、 Figure 2 、 Figure 5 、 Figure 9 As a specific embodiment, the vacuum sealing machine comprises the bag unfolding mechanism 2 described above, and further comprises two rotating discs 5 arranged in parallel and at intervals, a plurality of vacuum chambers 1 are uniformly arranged between the two rotating discs 5 in the circumferential direction, and a plurality of the bag unfolding mechanisms 2 are uniformly arranged in the vacuum chambers 1 in the interval direction of the two rotating discs 5.

[0053] Specifically, the vacuum packaging machine comprises two rotating discs 5 arranged at intervals, a plurality of vacuum chambers 1 are arranged between the two rotating discs 5, and a plurality of bag unfolding mechanisms 2 are arranged in the vacuum chambers 1 at intervals. In the specific work, the end of the movable seat 24 is provided with a clamping jaw assembly, the two side edges of the packaging bag can be clamped by the two clamping jaw assemblies on the two movable seats 24, the chamber cover 11 of the vacuum chamber 1 seals the mouth of the chamber body 10, at this time the chamber cover 11 of the vacuum chamber 1 is in direct correspondence with the clamping piece 22, the heating piece is arranged on the chamber cover 11, then the vacuum chamber 1 is vacuumized, so as to suck the air in the packaging bag, then the power telescopic piece 21 is elongated to drive the clamping piece 22 to move towards the chamber cover 11, in the process of movement, the two movable seats 24 can be driven to move away from each other by the second driving pin 221 acting on the driving surface 241, so as to pull the packaging bag to the two sides, to ensure that the mouth of the packaging bag can be unfolded, and in the process of movement of the clamping piece 22, the mouth of the packaging bag can be pressed towards the heating piece on the chamber cover 11, the mouth of the packaging bag is sealed by the heating piece, in this way, the movable seat 24 can be driven by the cooperation of the second driving pin 221 and the driving surface 241 while the mouth of the packaging bag is sealed, to achieve the effect of unfolding the packaging bag, so as to improve the sealing quality of the packaging bag.

[0054] Obviously, the above embodiments are only examples for clearly illustrating, and are not limitation to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A bag unfolding mechanism, characterized by, The utility model relates to a packaging bag clamping device, including: Support seat (23); Including first support surface; Movable seat (24) including two, movable seat (24) are set up with the drive surface (241) on the sliding of first support surface; Power telescopic piece (21) are set up in one side of support seat (23), and the end is provided with the clamping piece (22), and the clamping piece (22) is set up above movable seat (24), and the lower surface of clamping piece (22) is provided with two second drive pin (221) with two drive surface (241) one to one correspondence, the lower end of second drive pin (221) is driven with drive surface (241) and cooperates; Two movable seat (24) are about power telescopic rod symmetry and set up, drive surface (241) is configured as, when power telescopic rod moves, can drive two movable seat (24) at least to the direction of moving away from each other.

2. A bag opening mechanism according to claim 1, wherein Along the telescopic direction of power telescopic rod, drive surface (241) includes straight line segment (2410) and arc segment (2411), and the one end of arc segment (2411) away from straight line segment (2410) is bent to the direction of being close to another drive surface (241), and arc segment (2411) is set up on the side of straight line segment (2410) away from power telescopic rod.

3. A bag opening mechanism according to claim 2, wherein One end of second drive pin (221) is connected with clamping piece (22), and the other end is coaxially rotatably provided with the rolling part (222) matched with drive surface (241).

4. A bag opening mechanism according to claim 3, wherein Perpendicular to the direction of first support surface, arc-shaped hole is set up on movable seat (24), the lower end of second drive pin (221) extends into the arc-shaped hole, and drive surface (241) is the side of the two arc-shaped holes away from each other.

5. A bag opening mechanism according to any one of claims 1 to 4, wherein Perpendicular to first support surface, first pin (25) is set up on support seat (23) and is located on the side of drive surface (241), and second strip-shaped hole (240) is further set up on movable seat (24), and first pin (25) and second strip-shaped hole (240) are guided and cooperated, and second strip-shaped hole (240) extends and is set up in the direction away from drive surface (241).

6. A bag opening mechanism according to any one of claims 1 to 4, wherein The end of movable seat (24) away from power telescopic rod is provided with a jaw assembly for clamping a packaging bag.

7. A bag opening mechanism according to claim 6, wherein The jaw assembly includes a second arm (242) hingedly connected to the movable seat (24), a rotating rod (3) drivingly connected to the second arm (242), one of the end of the rotating rod (3) and the second arm (242) is provided with a first strip-shaped hole (310), and the other is provided with a first drive pin (201) extending into the first strip-shaped hole (310), and when the jaw assembly is in a clamping state, the length direction of the first strip-shaped hole (310) is perpendicular to the telescopic direction of the power telescopic piece (21).

8. A bag opening mechanism according to claim 7, wherein The end of the second arm (242) away from the hinged position is provided with a first jaw (245), and a second jaw (246) is provided on the movable seat (24) on the side close to the power telescopic rod, and the end of the rotating rod (3) is provided with the second arm (242), and the second arm (242) is drivingly connected to the first arm (31).

9. A bag opening mechanism according to claim 8, wherein The second clamping jaw (246) is detachably fixedly connected with the second arm (242) through a locking screw, and the second driving pin (221) is arranged at the end of the locking screw.

10. A vacuum sealer characterized by comprising: The exhibition bag mechanism (2) comprises two rotating discs (5) arranged in parallel and at intervals, a plurality of vacuum chambers (1) are uniformly arranged between the two rotating discs (5) in a circumferential direction, and a plurality of the exhibition bag mechanisms (2) are uniformly arranged in the vacuum chambers (1) in an interval direction of the two rotating discs (5).

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