Paper folding mechanism for powder packaging inner bag

Abstract

The utility model provides a paper folding mechanism for a powder packaging inner bag, and belongs to the technical field of medicine packaging equipment. The problem that an inner bag cannot be effectively folded through an existing powder packaging inner bag paper folding mechanism is solved. The paper pressing device comprises a horizontally-arranged bottom plate, a first baffle and a second baffle, a paper pressing space is formed between the first baffle and the second baffle, a pressing block is arranged in the paper pressing space, and the width of the pressing block in the direction perpendicular to the first baffle is smaller than the distance between the first baffle and the second baffle. A first sliding block and a second sliding block with the lower surfaces flush with the lower surface of the pressing block are arranged in the pressing block, and a driving structure used for driving the first sliding block to abut against the first baffle and driving the second sliding block to abut against the second baffle after the pressing block abuts against the bottom plate is further arranged in the pressing block. The folding marks can be formed between the first side attaching section and the bottom attaching section of the paper tape and between the second side attaching section and the bottom attaching section of the paper tape, the first side attaching section and the second side attaching section cannot be turned upwards after the paper tape is folded, and the folding effect is good.

Description

Technical Field

[0001] This utility model belongs to the technical field of pharmaceutical packaging equipment and relates to a paper folding mechanism for inner bags of powder packaging. Background Technology

[0002] Chinese patent discloses a secondary folding mechanism for the inner bag of an automatic powder packaging machine [authorization announcement number CN209305960U]. It includes a frame with a horizontal support surface, a first baffle perpendicular to the horizontal support surface and a second baffle opposite to and parallel to the first baffle on the frame. A U-shaped groove is formed between the first baffle and the second baffle. A pressing block is provided on the worktable for pressing the paper strip spanning between the first baffle and the second baffle into the U-shaped groove. The paper strip pressed into the U-shaped groove includes a bottom abutment section that abuts against the horizontal support surface, a side abutment section one that abuts against the first baffle and a side abutment section two that abuts against the second baffle. The frame is also provided with a push plate for abutting the side abutment section one, the side abutment section two, and the bottom abutment section together.

[0003] To prevent the pressed block from lifting the paper strip upwards, there must be gaps between the pressed block and both baffle one and baffle two. This will result in the pressed block not properly squeezing the connection points between side adhesive section one and side adhesive section two and the bottom adhesive section when it is pressed in. In other words, it will be impossible to form indentations between side adhesive section one and the bottom adhesive section, and between side adhesive section two and the bottom adhesive section. The folding effect will be poor. When the folded paper strip is pushed out of through slot two, side adhesive section one and side adhesive section two will unfold outwards at a certain angle due to tension, which is not conducive to putting it into the outer packaging bag. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a folding mechanism for powder packaging inner bags that provides a superior folding effect.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A paper-folding mechanism for an inner bag of powder packaging includes a horizontally arranged base plate, a first baffle vertically arranged on the base plate, and a second baffle arranged opposite to and parallel to the first baffle. A paper-pressing space is formed between the first baffle and the second baffle. A pressing block is provided in the paper-pressing space for pressing a paper strip spanning between the first baffle and the second baffle into the paper-pressing space. The width of the pressing block in the direction perpendicular to the first baffle is less than the distance between the first baffle and the second baffle. The pressing block is provided with a first slider and a second slider whose lower surfaces are flush with the lower surface of the pressing block. The pressing block is also provided with a driving structure for driving the first slider to abut the first baffle and for driving the second slider to abut the second baffle after the pressing block abuts the base plate.

[0007] Because the width of the pressure block in the direction perpendicular to the first baffle is less than the distance between the first and second baffles, a first slider and a second slider are respectively provided to form creases between the side-attachment section 1 and the bottom-attachment section, and between the side-attachment section 2 and the bottom-attachment section of the paper tape. When the pressure block presses the bottom-attachment section onto the base plate, the first slider presses onto the side-attachment section 1 under the action of the driving structure. An extrusion blade is formed between the side surface and the lower surface of the first slider, which compresses the area between the side-attachment section 1 and the bottom-attachment section, thus forming a crease. Similarly, when the pressure block presses the bottom-attachment section onto the base plate, the second slider presses onto the side-attachment section 2 under the action of the driving structure. An extrusion blade is formed between the side surface and the lower surface of the second slider, which compresses the area between the side-attachment section 2 and the bottom-attachment section, thus forming a crease.

[0008] In the above-mentioned powder packaging inner bag folding mechanism, the pressing block is provided with a T-shaped groove extending in a direction perpendicular to the first baffle and penetrating the lower surface of the pressing block. The first slider and the second slider are slidably disposed in the T-shaped groove. A relief cavity communicating with the T-shaped groove is provided above the T-shaped groove. The upper ends of the first slider and the second slider respectively extend into the relief cavity. A first spring is provided between the first slider and one side of the relief cavity, and a second spring is provided between the second slider and the other side of the relief cavity. Under the action of the first spring and the second spring, the first slider and the second slider move inward along the T-shaped groove.

[0009] Under the action of the first and second springs, the first and second sliders move inward into the T-slot. At this time, the width of the entire assembly consisting of the first slider, the second slider, and the pressure block in the direction perpendicular to the first baffle is less than the distance between the first and second baffles, allowing the assembly to smoothly enter the paper pressing space. After the pressing is completed, when the driving structure no longer acts on the first and second sliders, the first and second springs will also cause the first and second sliders to move into the T-slot.

[0010] In the above-mentioned powder packaging inner bag folding mechanism, the relief cavity has a guide rod arranged perpendicular to the first baffle. There are two guide rods, which are respectively arranged close to the side of the relief cavity. The first slider and the second slider are slidably sleeved on the guide rod. The first spring and the second spring mentioned above are respectively sleeved on the same guide rod.

[0011] The two guide rods are parallel to each other. The guide rods can not only guide the first and second sliders, but also limit the first and second springs to prevent them from falling off.

[0012] In the above-mentioned powder packaging inner bag folding mechanism, the top of the relief cavity is provided with a guide cavity that communicates with the relief cavity and extends vertically. The upper part of the guide cavity is provided with a guide hole that communicates with the guide cavity. The driving structure includes a push block that is slidably fitted in the guide cavity and a push rod that is slidably fitted in the guide hole. The lower end of the push rod is fixedly connected to the push block. The upper end of the push rod is provided with a limiting flange. A third spring that acts on the limiting flange is sleeved on the push rod. The lower end of the third spring acts on the pressure block. When the push block moves downward, it can drive the first slider and the second slider to move outward along the T-shaped groove.

[0013] The diameter of the guide hole is smaller than the minimum width of the cross-section of the guide cavity. Under the action of the third spring, the push block abuts against the upper surface of the guide cavity. When the push rod presses down, it will drive the pressure block, the first slider and the second slider to move downward together. When the lower surface of the pressure block abuts against the upper surface of the bottom plate, the push rod continues to move downward. During this process, the push block squeezes the first slider and the second slider, causing them to move outward along the T-slot until the outer sides of the first slider and the second slider abut against the first baffle and the second baffle respectively, so that the bottom abutment section, the side abutment section one and the side abutment section two are pressed tightly respectively, and creases are formed at the connection between the side abutment section one and the bottom abutment section and the side abutment section two and the bottom abutment section.

[0014] The push block is located between the two guide rods, and it will not touch the guide rods when the push block moves up and down.

[0015] In the above-mentioned powder packaging inner bag folding mechanism, the first slider has a first guide surface on the side facing the first slider, and the second slider has a second guide surface on the side facing the first slider. The maximum distance between the first guide surface and the second guide surface is greater than the width of the push block in the direction perpendicular to the first baffle.

[0016] When the push block is pressed down, it squeezes the first guide surface and the second guide surface respectively, causing the first slider and the second slider to move outward along the T-shaped groove.

[0017] In the above-mentioned powder packaging inner bag folding mechanism, the lower ends of the first baffle and the second baffle are respectively provided with through grooves that are attached to the upper surface of the bottom plate. The through grooves extend in a direction perpendicular to the first baffle, and the width of the through grooves is smaller than the width of the pressing block in the direction parallel to the first baffle.

[0018] After the paper tape forms a crease, a pusher plate is inserted through one of the slots. The pusher plate attaches the first side-attachment section to the bottom-attachment section. Then, the pusher plate rests against the crease between the second side-attachment section and the bottom-attachment section. The pusher plate extends into another slot, and under the action of the pusher plate and the second baffle, the second side-attachment section is attached to the upper side of the first side-attachment section. Because the width of the slot is smaller than the width of the pressure block in the direction parallel to the first baffle, the crease can be formed smoothly.

[0019] Compared with existing technologies, the folding mechanism of this powder packaging inner bag has the following advantages:

[0020] Because it has a first slider, a second slider and a driving structure, creases can be formed between the first side adhesive section and the bottom adhesive section of the paper tape, as well as between the second side adhesive section and the bottom adhesive section. When the paper tape is folded, the first side adhesive section and the second side adhesive section will not flip up, resulting in a good folding effect. The first slider and the second slider are driven by the push rod of the driving pressure block, which eliminates the need for additional structures. The overall structure is reasonably designed and ingeniously designed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the folding mechanism of the inner bag of powder packaging when the pressure block is not pressed in.

[0022] Figure 2 This is a left-right sectional view of the folding mechanism of the inner bag of the powder packaging when the pressure block is not pressed in.

[0023] Figure 3 This is a schematic diagram of the structure when the pressure block is pressed in during the folding mechanism of the inner bag of powder packaging.

[0024] Figure 4 This is a left-right sectional view of the folding mechanism of the inner bag of powder packaging when the pressure block is pressed in.

[0025] Figure 5 This is a front-to-back sectional view of the folding mechanism of the inner bag of powder packaging when the pressure block is pressed in.

[0026] In the diagram, 1 is the base plate; 2 is the first baffle; 3 is the second baffle; 4 is the pressure block; 5 is the first slider; 6 is the second slider; 7 is the T-slot; 8 is the clearance cavity; 9 is the first spring; 10 is the second spring; 11 is the guide rod; 12 is the guide cavity; 13 is the push block; 14 is the push rod; 15 is the limiting flange; 16 is the third spring; and 17 is the through groove. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figure 1The powder packaging inner bag folding mechanism shown includes a horizontally arranged base plate 1, a first baffle 2 vertically arranged on the base plate 1, and a second baffle 3 arranged opposite to and parallel to the first baffle 2. In this embodiment, the first baffle 2 is located on the right side, and the second baffle 3 is located on the left side, forming a pressing space between the first baffle 2 and the second baffle 3. A pressing block 4 is provided within the pressing space to press a paper strip spanning between the first baffle 2 and the second baffle 3 into the pressing space. The paper strip, with a V-shaped cross-section, contains powder, is folded again along its width, and then conveyed above the first baffle 2 and the second baffle 3. It is then cut by upstream scissors and the paper strip is then straddled between the first baffle 2 and the second baffle 3. To ensure the paper strip is completely pressed into the pressing space, the width of the pressing block 4 in the left-right direction is less than the distance between the first baffle 2 and the second baffle 3.

[0029] like Figure 2 As shown, the pressure block 4 contains a first slider 5 and a second slider 6, the lower surfaces of which are flush with the lower surface of the pressure block 4. The first slider 5 is located on the right side, and the second slider 6 is located on the left side. The pressure block 4 also contains a driving structure for driving the first slider 5 to the first baffle 2 and for driving the second slider 6 to the second baffle 3 when the pressure block 4 presses against the bottom abutment section on the bottom plate 1. When the pressure block 4 presses the bottom abutment section onto the bottom plate 1, the first slider 5 presses against the first side abutment section under the action of the driving structure. A pressing edge is formed between the side surface and the lower surface of the first slider 5, causing compression in the area between the first side abutment section and the bottom abutment section, resulting in a crease. Similarly, when the pressure block 4 presses the bottom abutment section onto the bottom plate 1, the second slider 6 presses against the second side abutment section under the action of the driving structure. A pressing edge is formed between the side surface and the lower surface of the second slider 6, causing compression in the area between the second side abutment section and the bottom abutment section, resulting in a crease.

[0030] like Figure 2 As shown, the pressure block 4 has a T-shaped groove 7 extending in the left-right direction and penetrating the lower surface of the pressure block 4. The first slider 5 and the second slider 6 are slidably disposed in the T-shaped groove 7. A relief cavity 8 communicating with the T-shaped groove 7 is provided above the T-shaped groove 7. The upper ends of the first slider 5 and the second slider 6 respectively extend into the relief cavity 8. A first spring 9 is provided between the first slider 5 and one side of the relief cavity 8, and a second spring 10 is provided between the second slider 6 and the other side of the relief cavity 8. Under the action of the first spring 9 and the second spring 10, the first slider 5 and the second slider 6 move inward along the T-shaped groove 7.

[0031] Under the action of the first spring 9 and the second spring 10, the first slider 5 and the second slider 6 move inward into the T-shaped groove 7. At this time, the width of the whole consisting of the first slider 5, the second slider 6 and the pressure block 4 in the left-right direction is less than the distance between the first baffle 2 and the second baffle 3, allowing the whole to smoothly enter the paper pressing space. After the pressing is completed, when the driving structure no longer acts on the first slider 5 and the second slider 6, the first spring 9 and the second spring 10 will also cause the first slider 5 and the second slider 6 to move into the T-shaped groove 7.

[0032] like Figure 2 , Figure 4 and Figure 5 As shown, the clearance cavity 8 has two guide rods 11 arranged perpendicular to the first baffle 2. The guide rods 11 are located close to the sides of the clearance cavity 8. The first slider 5 and the second slider 6 are slidably mounted on the guide rods 11. The first spring 9 and the second spring 10, as described above, are respectively mounted on the same guide rod 11. The two guide rods 11 are parallel to each other. The guide rods 11 not only guide the first slider 5 and the second slider 6, but also limit the first spring 9 and the second spring 10 to prevent them from falling off.

[0033] like Figure 2 , 4 As shown in Figure 5, the top of the relief cavity 8 is provided with a guide cavity 12 that communicates with and extends vertically from the relief cavity 8. The upper part of the guide cavity 12 is provided with a guide hole that communicates with the guide cavity 12. The driving structure includes a push block 13 that is slidably fitted in the guide cavity 12 and a push rod 14 that is slidably fitted in the guide hole. The lower end of the push rod 14 is fixedly connected to the push block 13. The upper end of the push rod 14 is provided with a limiting flange 15. A third spring 16 that acts on the limiting flange 15 is sleeved on the push rod 14. The lower end of the third spring 16 acts on the pressure block 4. When the push block 13 moves downward, it can drive the first slider 5 and the second slider 6 to move outward along the T-groove 7.

[0034] The diameter of the guide hole is smaller than the minimum width of the cross-section of the guide cavity 12. Under the action of the third spring 16, the push block 13 abuts against the upper surface of the guide cavity 12. At this time, when the push rod 14 presses down, it will drive the pressure block 4, the first slider 5 and the second slider 6 to move downward together. When the lower surface of the pressure block 4 abuts against the upper surface of the bottom plate 1, the push rod 14 continues to move downward. During this process, the push block 13 squeezes the first slider 5 and the second slider 6 to make them move outward along the T-shaped groove 7 until the outer sides of the first slider 5 and the second slider 6 abut against the first baffle 2 and the second baffle 3 respectively, so that the bottom abutment section, the first side abutment section and the second side abutment section are pressed tightly respectively, and creases are formed at the connection between the first side abutment section and the bottom abutment section and the second side abutment section and the bottom abutment section.

[0035] The push block 13 is located between the two guide rods 11, and the push block 13 will not touch the guide rods 11 when it moves up and down.

[0036] like Figure 2 , 4 As shown in Figure 5, the first slider 5 has a first guide surface on the side facing the first slider 5, and the second slider 6 has a second guide surface on the side facing the first slider 5. The maximum distance between the first guide surface and the second guide surface is greater than the width of the push block 13 in the direction perpendicular to the first baffle 2. The push block 13 has a V-shaped cross-section. When the push block 13 is pressed down, it squeezes the first guide surface and the second guide surface respectively, causing the first slider 5 and the second slider 6 to move outward along the T-shaped groove 7.

[0037] like Figure 1-4 As shown, the lower ends of the first baffle 2 and the second baffle 3 are respectively provided with through grooves 17 that are attached to the upper surface of the bottom plate 1. The through grooves 17 extend in a direction perpendicular to the first baffle 2, and the width of the through grooves 17 is smaller than the width of the pressure block 4 in the direction parallel to the first baffle 2.

[0038] After the paper tape forms a crease, a pusher plate is inserted through one of the slots 17. The pusher plate attaches the first side-attachment section to the bottom-attachment section. Then, the pusher plate abuts against the crease between the second side-attachment section and the bottom-attachment section. The pusher plate extends into another slot 17, and under the action of the pusher plate and the second baffle 3, the second side-attachment section abuts against the upper side of the first side-attachment section. Because the width of the slot 17 is less than the width of the pressure block 4 in the direction parallel to the first baffle 2, it ensures that the crease can be formed smoothly.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A folding mechanism for an inner bag of powder packaging, comprising a horizontally arranged base plate (1), a first baffle (2) vertically arranged on the base plate (1), and a second baffle (3) arranged opposite to and parallel to the first baffle (2), wherein a paper pressing space is formed between the first baffle (2) and the second baffle (3), and a pressing block (4) is provided in the paper pressing space for pressing a paper strip spanning between the first baffle (2) and the second baffle (3) into the paper pressing space, wherein the width of the pressing block (4) in the direction perpendicular to the first baffle (2) is less than the distance between the first baffle (2) and the second baffle (3), characterized in that, The pressure block (4) is provided with a first slider (5) and a second slider (6) whose lower surfaces are flush with the lower surface of the pressure block (4). The pressure block (4) is also provided with a driving structure for driving the first slider (5) to abut against the first baffle (2) and driving the second slider (6) to abut against the second baffle (3) when the pressure block (4) abuts against the bottom plate (1).

2. The powder packaging inner bag folding mechanism according to claim 1, characterized in that, The pressure block (4) is provided with a T-shaped groove (7) extending in a direction perpendicular to the first baffle (2) and penetrating the lower surface of the pressure block (4). The first slider (5) and the second slider (6) are slidably disposed in the T-shaped groove (7). A relief cavity (8) communicating with the T-shaped groove (7) is provided above the T-shaped groove (7). The upper ends of the first slider (5) and the second slider (6) respectively extend into the relief cavity (8). A first spring (9) is provided between the first slider (5) and one side of the relief cavity (8). A second spring (10) is provided between the second slider (6) and the other side of the relief cavity (8). Under the action of the first spring (9) and the second spring (10), the first slider (5) and the second slider (6) move inward along the T-shaped groove (7).

3. The powder packaging inner bag folding mechanism according to claim 2, characterized in that, The relief cavity (8) has a guide rod (11) arranged perpendicular to the first baffle (2). There are two guide rods (11) and they are respectively arranged close to the side of the relief cavity (8). The first slider (5) and the second slider (6) are slidably sleeved on the guide rod (11). The first spring (9) and the second spring (10) mentioned above are respectively sleeved on the same guide rod (11).

4. The powder packaging inner bag folding mechanism according to claim 2, characterized in that, The top of the relief cavity (8) is provided with a guide cavity (12) that communicates with the relief cavity (8) and extends vertically. The upper part of the guide cavity (12) is provided with a guide hole that communicates with the guide cavity (12). The driving structure includes a push block (13) that is slidably fitted in the guide cavity (12) and a push rod (14) that is slidably fitted in the guide hole. The lower end of the push rod (14) is fixedly connected to the push block (13). The upper end of the push rod (14) is provided with a limiting flange (15). A third spring (16) that acts on the limiting flange (15) is sleeved on the push rod (14). The lower end of the third spring (16) acts on the pressure block (4). When the push block (13) moves downward, it can drive the first slider (5) and the second slider (6) to move outward along the T-groove (7).

5. The powder packaging inner bag folding mechanism according to claim 4, characterized in that, The first slider (5) has a first guide surface on the side facing the first slider (5), and the second slider (6) has a second guide surface on the side facing the first slider (5). The maximum distance between the first guide surface and the second guide surface is greater than the width of the push block (13) in the direction perpendicular to the first baffle (2).

6. The powder packaging inner bag folding mechanism according to claim 1, characterized in that, The lower ends of the first baffle (2) and the second baffle (3) are respectively provided with through grooves (17) that are attached to the upper surface of the bottom plate (1). The through grooves (17) extend in a direction perpendicular to the first baffle (2), and the width of the through grooves (17) is less than the width of the pressure block (4) in the direction parallel to the first baffle (2).

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