A packaging bag sealing device

Abstract

The utility model discloses a packing bag seal technical field's a packing bag seal device, including frame, hinged setting first swing arm and second swing arm on the frame, and the end of first swing arm and second swing arm is provided with heat seal block respectively, and the one end of second swing arm away from heat seal block extends and is provided with swing arm, and the middle part between swing arm and first swing arm is provided with connecting rod, to be used for when one of swing arms is driven to rotate and drive another swing arm opening and closing, the scheme is through setting swing arm on second swing arm, and the middle part between swing arm and first swing arm is provided with connecting rod, so that second swing arm can drive first swing arm synchronous opening and closing when rotating, simple structure, compared with the gear meshing split -gate mode without return gap, make the opening synchronous degree is high, is favorable to with packing bag separation.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag sealing, specifically to a packaging bag sealing device. Background Technology

[0002] Heat sealing is a common sealing method for food packaging bags. It usually uses a pair of heat sealing blocks to close and heat-press at the sealing position at the top of the packaging bag. In the existing technology, the heat sealing blocks can be set to be split or one heat sealing block can be stationary while the other heat sealing block moves.

[0003] The above hot pressing methods require a driving device. The split hot pressing method generally uses two swing arms to open and close the valves. The two swing arms are designed with a linkage structure to facilitate synchronous opening and closing. In the existing technology, the linkage structure is complex and may have rotational backlash (such as gear meshing) that may cause asynchronous opening and closing. Therefore, a sealing device with a simple structure and synchronous opening and closing is needed. Utility Model Content

[0004] The purpose of this utility model is to provide a packaging bag sealing device that solves the problems of asynchronous opening or complex linkage structure in existing sealing devices.

[0005] This utility model achieves the above objectives through the following technical solutions: A packaging bag sealing device includes a frame, a first rotating arm and a second rotating arm hinged to the frame, a heat sealing block is provided at the end of the first rotating arm and the second rotating arm respectively, and a swing arm is provided at the end of the second rotating arm away from the heat sealing block. A connecting rod is provided between the swing arm and the middle of the first rotating arm to drive the other rotating arm to open and close when one of the rotating arms is driven to rotate.

[0006] As a preferred embodiment of this utility model, the first rotating arm and the second rotating arm are each a set. The first rotating arm is connected to the frame via the same first rotating shaft and is rotatably connected to the frame. The second rotating arm is connected to the frame via the same second rotating shaft. This embodiment makes the rotation of the two sets of rotating arms stable by setting up a double-linked first rotating arm and second rotating arm and connecting them to the frame via rotating shafts.

[0007] As a preferred embodiment of this utility model, the connecting rod is L-shaped and has a pair. The two ends of the connecting rod are respectively provided with a first shaft body connected to the swing arm and a second shaft body connected to the first rotating arm. A connecting rib is also provided between the two connecting rods. By setting the L-shaped connecting rod, this embodiment can connect from the swing arm to the middle part of the first rotating arm, which overcomes spatial interference compared with conventional connecting rod structures.

[0008] As a preferred embodiment of this utility model, the rotating arm is driven to rotate by a telescopic drive unit mounted on the frame. One end of the telescopic drive unit is hinged to the frame, and the other end is hinged to one of the rotating arms. This embodiment is driven by a telescopic drive unit, which can be configured as a cylinder with its tail end hinged to the frame and its output end hinged to the first rotating arm.

[0009] As a preferred embodiment of the present invention, a first mounting base is provided at the end of the first rotating arm, and a first heat sealing block is provided on the first mounting base.

[0010] In a preferred embodiment of this utility model, a second mounting base is provided at the end of the second rotating arm, and at least a pair of slide rods are slidably disposed on the second mounting base. The slide rods are connected to a second heat-sealing block, and an elastic element is also provided between the second mounting base and the second heat-sealing block. A limit cap is provided at the end of the slide rod away from the second heat-sealing block, and a positioning limit protrusion is provided on the surface of the limit cap. A groove corresponding to the limit protrusion is provided on the surface of the second mounting base. This embodiment enables a movable connection between the second heat-sealing block and the second mounting base, and provides pressure during hot pressing through the elastic element, preventing the unstable stroke of the telescopic drive unit from causing excessive or insufficient hot pressing pressure, which would reduce the accuracy of stroke control.

[0011] As a preferred embodiment of this utility model, an elastic pad is provided at the sliding engagement point between the slide rod and the second mounting base. The elastic pad between the second swing arm and the slide rod allows for a small amount of radial movement, so that after the second swing arm swings to drive the second heat sealing block to contact the first heat sealing block, the first swing arm continues to apply force to overcome the elastic element and has a certain degree of freedom with the slide rod.

[0012] The beneficial effects of this utility model are as follows: This solution sets a swing arm on the second rotating arm and sets a connecting rod between the swing arm and the first rotating arm, so that the second rotating arm can drive the first rotating arm to open and close synchronously when rotating. The structure is simple and there is no backlash compared with the gear meshing method, which makes the opening synchronization high and is conducive to separation from the packaging bag. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is the front view of the present invention; Figure 4 This is a side view of the present invention; Figure 5 For the present utility model Figure 3 Enlarged view of the structure of section A in the middle; In the diagram: 1. Frame; 2. First rotating arm; 201. First rotating shaft; 202. First mounting base; 203. First heat-sealing block; 3. Second rotating arm; 301. Second rotating shaft; 302. Swing arm; 303. Second mounting base; 304. Slide rod; 305. Second heat-sealing block; 306. Limit cap; 307. Elastic pad; 308. Limiting protrusion; 309. Elastic element; 4. Connecting rod; 401. First shaft; 402. Second shaft; 5. Telescopic drive unit; 6. Electrically controlled heating unit. Detailed Implementation

[0014] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0015] Example 1 like Figure 1-5 As shown, a packaging bag sealing device includes a frame 1, a first rotating arm 2 and a second rotating arm 3 hinged to the frame 1. Heat sealing blocks are respectively provided at the ends of the first rotating arm 2 and the second rotating arm 3. A swing arm 302 is provided at the end of the second rotating arm 3 away from the heat sealing block. A connecting rod 4 is provided between the swing arm 302 and the middle of the first rotating arm 2 for driving the other rotating arm to open and close when one of the rotating arms is driven to rotate. An electrically controlled heating part 6 is provided on the heat sealing block for controlling the temperature of the heat sealing block.

[0016] This solution features a swing arm 302 mounted on the second rotating arm 3, with a connecting rod 4 positioned between the swing arm 302 and the first rotating arm 2. This allows the second rotating arm 3 to synchronously open and close the first rotating arm 2 during rotation. The structure is simple and, compared to gear-operated opening methods, has no backlash, resulting in high opening synchronization and facilitating separation from the packaging bag. In use, as... Figure 3 As shown, when the second rotating arm 3 is driven to rotate clockwise, the swing arm 302 rotates clockwise instantaneously, causing the connecting rod 4 to translate (or approximately translate) to the right, thereby driving the first rotating arm 2 to rotate and open with the second swing arm 3.

[0017] Preferably, the first rotating arm 2 and the second rotating arm 3 are each a set. The first rotating arm 2 is connected to the frame 1 through the same first rotating shaft 201 and is rotatably connected to the frame 1. The second rotating arm 3 is connected to the frame 1 through the same second rotating shaft 301. In this embodiment, by setting up a double-linked first rotating arm 2 and second rotating arm 3 and connecting them to the frame 1 through rotating shafts, the two sets of rotating arms can rotate stably.

[0018] Preferably, the connecting rod 4 is L-shaped and has a pair. The two ends of the connecting rod 4 are respectively provided with a first shaft 401 connected to the swing arm 302 and a second shaft 402 connected to the first rotating arm 2. A connecting rib is also provided between the two connecting rods 4. In this embodiment, by setting the connecting rod 4 to be L-shaped, it can be connected from the swing arm 302 to the middle part of the first rotating arm 2, which overcomes spatial interference compared with conventional connecting rod structures.

[0019] The rotating arm is driven to rotate by a telescopic drive unit 5 mounted on the frame 1. One end of the telescopic drive unit 5 is hinged to the frame 1, and the other end is hinged to one of the rotating arms. The telescopic drive unit 5 can be configured as a cylinder, with its tail end hinged to the frame and its output end hinged to the first rotating arm.

[0020] Example 2 Unlike Embodiment 1, in this application, the second rotating arm 3 is movably connected to its corresponding heat-sealing block. For details, please refer to [link to related documentation]. Figure 3-5 The first rotating arm 2 has a first mounting base 202 at its end, and a first heat-sealing block 203 is mounted on the first mounting base 202. The second rotating arm 3 has a second mounting base 303 at its end, and at least one pair of sliding rods 304 are slidably mounted on the second mounting base 303. The sliding rods 304 are connected to the second heat-sealing block 305. An elastic element 309 is also provided between the second mounting base 303 and the second heat-sealing block 305. A limit cap 306 is provided at the end of the sliding rod 304 away from the second heat-sealing block 305. The surface of the limit cap 306 is provided with a positioning limit protrusion 308, and the surface of the second mounting base 303 is provided with a groove corresponding to the limit protrusion 308. This design allows the second heat-sealing block 305 and the second mounting base 303 to be movably connected. The elastic element 309 provides the pressure during hot pressing. The elastic element 309 is a spring to prevent the hot pressing pressure from being too high or too low due to the unstable stroke of the telescopic drive part 5, which would reduce the accuracy of stroke control.

[0021] It should be noted that the spring is always in a charged state, and it maintains the charged state under the action of the limit cap 306. Since the sliding between the slide rod 304 and the second mounting base 303 has a degree of freedom in the radial direction, the limit protrusion 308 mates with the groove, so that the second heat sealing block 305 maintains the angle and prevents the second heat sealing block 305 from sagging. When the second heat sealing block 305 presses the packaging bag, the second rotating arm 3 continues to rotate, and the force is applied to the second heat sealing block 305 through the spring. The force applied by the spring will not cause excessive force. When there is a slight difference in the stroke of the second rotating arm 3, it will not cause a sudden increase / decrease in pressure. After the heat pressing is completed, the telescopic drive part 5 retracts and the two sets of rotating arms open.

[0022] An elastic pad 307 is provided at the sliding engagement point between the slide rod 304 and the second mounting base 303. The elastic pad 307 between the second swing arm 3 and the slide rod 304 allows for a small amount of radial movement, so that after the second swing arm 3 swings to drive the second heat sealing block 305 to contact the first heat sealing block 203, the first swing arm has a certain degree of freedom with the slide rod when it continues to apply force to overcome the elastic element.

[0023] like Figure 3 As shown, when the telescopic drive unit 5 retracts, the second rotating arm 3 and the swing arm 302 rotate clockwise, and the connecting rod 4 drives the first swing arm 2 to rotate counterclockwise, thus completing the opening. During heat sealing and pressing, the second rotating arm 3 rotates counterclockwise and the first rotating arm 2 rotates clockwise. When the second heat sealing block 305 contacts the packaging bag, the second rotating arm 3 continues to swing at a small angle, causing the limit cap 306 to leave contact with the second mounting base 303. Then, the spring force pre-stored by the spring is applied to the second heat sealing block 305 to complete the heat sealing.

[0024] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A packaging bag sealing device, characterized in that, The device includes a frame (1), a first rotating arm (2) and a second rotating arm (3) hinged on the frame (1). The ends of the first rotating arm (2) and the second rotating arm (3) are respectively provided with heat sealing blocks. The second rotating arm (3) extends to the end away from the heat sealing block and is provided with a swing arm (302). A connecting rod (4) is provided between the swing arm (302) and the middle of the first rotating arm (2) to drive the other rotating arm to open and close when one of the rotating arms is driven to rotate.

2. The packaging bag sealing device according to claim 1, characterized in that, The first rotating arm (2) and the second rotating arm (3) each have a set. The first rotating arm (2) is connected to the frame (1) through the same first rotating shaft (201) and is rotatably connected to the frame (1). The second rotating arm (3) is connected to the frame (1) through the same second rotating shaft (301).

3. The packaging bag sealing device according to claim 1, characterized in that, The connecting rod (4) is L-shaped and has a pair. The two ends of the connecting rod (4) are respectively provided with a first shaft (401) connected to the swing arm (302) and a second shaft (402) connected to the first rotating arm (2). A connecting rib is also provided between the two connecting rods (4).

4. A packaging bag sealing device according to claim 1, characterized in that, The rotating arm is driven to rotate by a telescopic drive unit (5) mounted on the frame (1). One end of the telescopic drive unit (5) is hinged to the frame (1), and the other end is hinged to one of the rotating arms.

5. A packaging bag sealing device according to claim 2, characterized in that, The first rotating arm (2) is provided with a first mounting base (202) at its end, and a first heat sealing block (203) is provided on the first mounting base (202).

6. A packaging bag sealing device according to claim 2, characterized in that, The second rotating arm (3) is provided with a second mounting base (303) at its end. At least one pair of slide rods (304) are slidably provided on the second mounting base (303). The slide rods (304) are connected to a second heat sealing block (305). An elastic element (309) is also provided between the second mounting base (303) and the second heat sealing block (305). A limit cap (306) is provided at the end of the slide rod (304) away from the second heat sealing block (305). A positioning limit protrusion (308) is provided on the surface of the limit cap (306), and a groove corresponding to the limit protrusion (308) is provided on the surface of the second mounting base (303).

7. A packaging bag sealing device according to claim 6, characterized in that, An elastic pad (307) is provided at the sliding engagement point between the slide rod (304) and the second mounting base (303).

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